Chapter 1: Overview of foundation and foundation engineering construction.
Since the construction of Ming 'an Sports Equipment (Dongguan) Co., Ltd.-No.3 Workshop (newly-built) project undertaken by our company, our project department has successfully completed the construction of foundation and foundation sub-projects with the careful guidance and help of quality supervision station, urban construction office, design, survey, construction, supervision and other units in accordance with the requirements of design drawings and relevant construction specifications. Now, on behalf of the construction unit, I will briefly report to the leaders and experts on the construction and quality of this sub-project.
I. Overview of the Project
This project is the No.3 factory building of Ming 'an Sports Equipment (Dongguan) Co., Ltd. (newly built), with a total construction area of 5147.95m2. It is located in Longyan Community, Humen Town, Dongguan City, and invested and constructed by Ming 'an Sports Equipment (Dongguan) Co., Ltd., with Shaoguan Geological Engineering Survey Institute conducting geological survey on the project site, Guangdong Fanghua Engineering Design Co., Ltd. responsible for engineering drawing design, and Dongguan Guanye Architectural Design Institute Co., Ltd. responsible for engineering design.
This project is a newly-built five-story factory building with a building height of 23.95m m. According to the design drawings, the pile foundation of this project is in the form of prestressed concrete pipe pile foundation, the design strength of concrete is C80, and the type of pipe pile is PHC-A400(95). The design pile length is about 2 1m, and the total number of piles is 1 12. The bearing layer at the pile tip is strongly weathered granite, and the characteristic value of vertical bearing capacity of single pile is 1 100KN. The structure type is reinforced concrete frame structure, and the seismic fortification crack is 7 degrees. The seismic fortification category of the building is Class C, the safety level of the building structure is Class II, and the service life of the structure is 50 years.
The pile foundation engineering of this project was tested on May 30th, 20xx, and started formally the next day. Completed on June 30th, 20xx 1 1. The underground structure project officially started on June 20xx 13, and the underground structure sub-project was completed on July 22, 20xx.
Second, the labor organization and arrangement measures
Adequate labor input is a necessary factor to ensure the realization of the construction period. The choice of professional construction jobs and labor force must be made under the conditions of high quality and good technology. According to the characteristics of this project, the sectional cross flow construction operation shall be carried out reasonably. In strict accordance with the template engineering installation → reinforcement engineering installation → concrete engineering pouring, structural engineering construction shall be carried out.
In terms of labor demand, according to the characteristics of each sub-project and the requirements of time limit control, we should equip enough labor, establish a reward and punishment system, carry out labor competitions, do a good job in logistics support for team work and life, and ensure the smooth completion of construction tasks.
Third, the construction quality management control
In order to ensure that the design drawings and the quality objectives required by Party A are achieved, the project department strictly implements the ISO900 1 quality assurance system; In the whole underground structure engineering, the procedures of intermediate detection and multi-person acceptance are implemented; Regular quality inspection and improvement of work summary system.
1, during the construction process, the project department formulates the responsibilities of each post, implements total quality management, and ensures the construction quality; Establish and improve the two-level measurement handover system; Do a good job in construction production, measurement and acceptance; Construction technicians and management personnel shall arrange engineering tasks and technical disclosure work in strict accordance with the construction organization design scheme and relevant thematic schemes approved by relevant units, the construction drawings of this project, Code for Acceptance of Construction Quality of Concrete Structure Engineering (GB50204-20xx) and relevant laws, regulations and rules, and the disclosure contents include operating points, engineering quality requirements and safety precautions, and carefully check the implementation during the construction process.
2. Supervise Mishima's work in material acceptance, construction operation and quality inspection. All incoming materials shall be sampled and sent for inspection according to 100% supervision witness (see the table below for details). In short, all materials can only be used after re-inspection, and unqualified materials are prohibited from entering the site.
3. The construction technical data of building engineering is the original record of relevant parties such as construction management, quality control and technical measures, and is one of the important basis for project completion acceptance. The technical data of this project should be sorted, collected and classified timely and accurately in the process of project construction, so as not to lose, leak, be good and conform to the facts.
4. Engineering quality inspection should adhere to the "three inspections", that is, self-inspection, mutual inspection and handover inspection. Do not meet the quality requirements, and the next working procedure is not allowed. All concealed works must be accepted by Party A and the site supervisor in accordance with the regulations before entering the next working procedure.
5, subdivisional work quality control situation
5. 1 Pile Foundation Engineering
The pile foundation construction method of this project adopts hammer piling, and the pile hammer adopts 6.2-ton heavy hammer. The characteristic value of vertical bearing capacity of single pile is1100kn; After the pile foundation construction is completed, Party A entrusts Dongguan Construction Engineering Testing Center to carry out reflected wave detection and high strain dynamic test on the pipe pile. The test results show that the vertical ultimate bearing capacity of single pile is more than twice that of the designed single pile, which meets the design requirements.
This pile foundation project passed the self-inspection, and on August 18, 20xx, the supervision unit organized the Municipal Quality Supervision Station, Town Urban Construction Office, the construction unit, the design unit, the survey unit, the general contractor and the pile foundation subcontractor to carry out the acceptance of the pile foundation division. After the relevant units reached an agreement at the acceptance meeting, the acceptance evaluation results were qualified and they agreed to proceed to the next construction process.
5.2 template engineering
5.2. 1 For the installation of cast-in-place structure formwork, the formwork support system, column position, pad and installation sundries shall be cleaned in each acceptance batch according to the requirements of Code for Acceptance of Construction Quality of Concrete Structure Engineering (GB50204-2002); The position, exposed length and size of embedded parts and reserved holes are observed and detected by level or stay wire and steel rule, and the axial position, section size, height verticality, surface elevation difference and surface flatness of two adjacent plates of wall, column and beam are observed and detected by total station and steel rule, all of which meet the requirements.
5.2.2 In each acceptance batch, according to the requirements of Code for Acceptance of Construction Quality of Concrete Structure Engineering (GB50204-2002), the concrete strength of bottom formwork and its supports should be removed to ensure that the concrete surface and edges and corners are not damaged, and no impact load will be formed on the floor during formwork removal. The removed formwork and supports should be removed in time.
5.3 reinforcement engineering
All steel products in this project are produced by large factories, and have factory certificates. The incoming steel shall be witnessed and sampled according to the requirements of different manufacturers and different batches of 60T, and can be put into structural use only after passing the inspection by the inspection department. The scale of steel bar production, the length and angle of steel bar hook and the bending size of steel bar all meet the design and specification requirements; The processed semi-finished products shall be marked and stacked according to specifications to prevent pollution; Reinforcement shall be bound in strict accordance with the design requirements of drawings; Concrete cushion blocks shall be prefabricated according to the requirements of drawings, and the thickness of protective layer of steel bars shall be ensured. After the steel bar is installed and passed the self-inspection, Party A, design, supervision, quality supervision and other departments shall be notified in time for concealed acceptance, and the next working procedure can be carried out only after passing the inspection.
5.4 concrete engineering
Commercial concrete is used in this project, and the concrete manufacturer chooses Dongguan Zhenhuitong Concrete Co., Ltd., which is close to the construction site, to control the concrete pouring time.
5.4. 1 In each acceptance batch of concrete construction, according to the requirements of Code for Acceptance of Construction Quality of Concrete Structure Engineering (GB50204-20xx), the strength grade and slump of concrete are tested, and the samples are sampled and retained, and the initial setting time is controlled during concrete pouring. After concrete pouring, it shall be cured within 12h as required. Ensure the construction quality of the poured concrete.
5.4.2 The appearance quality and dimensional deviation of cast-in-place concrete structure shall meet the requirements of each acceptance batch in GB50204 Code for Quality Acceptance of Concrete Structure Engineering, and there shall be no serious defects such as exposed tendons, holes, slag inclusion, looseness and cracks in appearance; The size deviation of structure and use function is within the allowable range, which does not affect the structure performance and use function; Axis position, height verticality, elevation, section size, surface smoothness, and centerline position of reserved holes of walls, columns, beams and shear walls are all within the allowable range.
Four, safe production and civilized construction
In the construction of underground structure engineering, safety production and civilized construction have achieved the company's set goals, no safety accidents have occurred, and "prevention first, safety first" has been achieved. The main work is as follows.
1 First of all, safety education and safety learning begin with the team entering the site. Carry out all kinds of safety education and learning for all types of work, and at the same time hold regular safety meetings and meetings of company managers and team leaders. The team conducts safety self-inspection every day, and the construction management personnel organize safety inspection every week. The implementation of various safety systems and the timely rectification of hidden dangers provide safety guarantee for construction and production.
2. As an important event, the fire control work on the construction site was carried out, and various fire control systems were implemented, so that a special person was responsible for checking the fire hazards on the operation floor after work.
3. Safety and quality accidents: This project has received strong support and cooperation from the construction unit, supervision unit and quality supervision station from the very beginning, especially the staff of the supervision company, who take pains to stand by and supervise every day, and struggle with our employees in the front line of production, and put forward many valuable opinions on the quality and safety of this project, which has played a very good supervisory role for our company; Employees at all levels of our company abide by relevant management regulations and accept the management of the management department.
Five, foundation and foundation division project acceptance and summary
This project Ming 'an Sports Equipment (Dongguan) Co., Ltd.-No.3 workshop (newly built) has completed all the contents agreed in the design and construction contract, and the project quality conforms to the relevant provisions of the construction contract, relevant laws, regulations and mandatory standards:
1, construction quality acceptance of all kinds of subdivisional work;
2. The quality control information is basically complete;
3. Visual quality acceptance;
Our company believes that all aspects of the basic division construction of this project have achieved the established goals. After the inspection and appraisal of relevant materials by our company, our comprehensive evaluation of the acceptance of the basic branch project is: qualified.
Through the construction management of foundation and foundation engineering, we summarized the experience and learned the lesson. We hope that the leaders will put forward valuable opinions and suggestions on our work, and are determined to make continuous improvement in future construction management. Because of the strict requirements of the relevant units, our experience and technology in management and construction have been upgraded to a higher level, laying a good foundation for future engineering construction.
Construction unit (official seal): Dongguan Zhensheng Construction Engineering Co., Ltd.
Chapter II: Overview of Foundation and Foundation Acceptance Construction
I. Overview of the Project
Suzhou Railway Station Reconstruction Project is a large-scale railway transportation hub project integrating railway, urban rail and urban road traffic transfer. The project consists of three parts: the general speed station building on the south side, the intercity station building on the north side and the overhead waiting hall across the line. There are two floors above the ground, three underground floors, one above the ground, the first underground floor is the exit passage floor, the second underground floor is the waiting hall, and the second and third underground floors are the subway line 2 and 4 stations, with a total construction area of 857 17 square meters. The main structure of the station building is a reinforced concrete frame structure system. The first floor platform is a prestressed concrete box girder structure with a box girder span of 54.6 meters. The roof structure of the station building is a two-way spatial steel tube truss structure with a rhombic cross section, a rhombic width of 1 1m and a height of 8m.
The main structure of the station building is a reinforced concrete frame structure system, with post-grouting bored piles as the foundation, and the pile diameter is 1250 mm, and the bearing layer at the pile end is is?9 silt layer and? 10/0 clay layer. The pile tip enters the bearing stratum not less than 2m, and the pile length is about 45 ~ 66m. Among them, C35 concrete is used for pile foundation, C40 concrete is used for pile cap, basement floor and basement exterior wall (shrinkage-compensating concrete is required, impermeability grade is 1.2MPa, thickness of floor and exterior wall is 1m), C50 concrete is used for frame column, C45 concrete is used for frame beam and slab (polypropylene fiber is added), and the subway equipment building. Except for the wall and part of the floor, the other parts of the subway equipment room are all grade III steel. The first floor beam is designed with post-tensioned bonded prestress, and its prestressed tendons are 1860MPa, φs 15.2 low relaxation steel strand; Bonded prestress is set in the embedded corrugated pipe, which is grouted with M50 micro-expansive cement slurry after tensioning. KZ 1, KZ7, KZ8, KZ9 and KZ 10 adopt reinforced concrete structure, that is, the processed steel steel skeleton is embedded in reinforced concrete.
Second, the scope of acceptance
Concrete entity engineering of basement foundation and intercity station building foundation (including pile foundation, bottom plate, basement external wall, basement structural column, beam slab and external wall waterproofing). Due to the engineering characteristics and construction conditions, some areas and projects belonging to the foundation and foundation division were not included in the acceptance scope, specifically: underground masonry engineering, underground civil air defense engineering, subway design area and underground stairs (stairs 5, 6, 7 and 8, stairs 1, 2 and 3). See the attached drawings for details of the acceptance area.
The construction unit of this project is Shanghai Railway Bureau, the survey unit is Railway Fourth Survey and Design Institute, the design unit is China Architectural Design and Research Institute, the supervision unit is Shanghai Tianyou Engineering Consulting Co., Ltd., the construction unit is Suzhou Station Reconstruction Project Department of China Railway 12th Bureau Group, the pile foundation detection unit is Anhui China Railway Engineering Technology Service Co., Ltd., and the test detection unit is Suzhou Construction Engineering Quality Inspection Center.
Three. Brief introduction of construction process
From the drilling of 36# pile on February 6, 2008 to the grouting of kb52# pile on August 30, 2008, 555 piles have been completed, and 5 14 piles have been accepted according to the needs of the project. From July 2, 2008 1 to February 20081,the slope support of the 3 -6.5m-9.55m section of Area C was completed, during which 390,000 cubic meters of earthwork was excavated, and the slope support was completed18470m2; . From June 5438+ 10, 2008 to June 65438+June, 2009, the bottom plate of the equipment room of China Railway was poured, and the post-pouring belt of the north-south passage in the basement was poured, with about 36,000 cubic meters of concrete and 4,500 tons of steel bars. Complete the tensioning of prestressed tendons, including 25 items; Completion of steel skeleton hoisting, * * * about 300 tons. After nearly two years of hard construction, the main project construction task of Suzhou Station Intercity Station Building has been basically completed. During this period, the partial acceptance of engineering piles was carried out on August 1 1 2009.
During this period, under the strong support and supervision of Suzhou Station Engineering Command of Shanghai Railway Bureau and Shanghai Tianyou Engineering Consulting Co., Ltd., and under the strict quality control and construction specifications of all construction personnel, an effective quality management system and perfect technical guidance were formulated. Continuously strengthen the quality awareness education of all employees, give full play to the enthusiasm of the majority of employees, in order to improve product quality; And timely and effective communication with subcontractors, cooperate to reduce rework and time delay.
Fourth, the use of raw materials.
1, steel bar
The steel bars are mainly Shagang and Yonggang, among which, except the wall and some floors of the subway equipment room are Grade II steel, the rest are Grade III steel. Raw materials such as steel bars have quality guarantee and re-inspection report. Steel bar connection mainly adopts straight thread, and local welded joints are adopted. Material approach and field sampling are monitored by the supervisor, and the number of test pieces and test results meet the requirements of acceptance specifications. See table 1 for the data of related steel bar material report, steel bar connection and welding retest.
Step 2 be specific
The concrete is provided by Suzhou Hangxin Yongsheng Commercial Concrete Company, and the concrete has a mix ratio list of commercial concrete. During each construction, a supervisor will conduct on-site sampling and witness sampling, and the number of test blocks and test results meet the requirements of acceptance specifications. Among them, C35 concrete is used for pile foundation, C40 concrete is used for pile cap, basement floor and basement exterior wall (shrinkage-compensating concrete is required, impermeability grade is 1.2MPa, and the thickness of floor and exterior wall is 1m), C50 concrete is used for frame column (with polypropylene fiber), C45 concrete is used for frame beam and slab (with polypropylene fiber), and other subway equipment. See table 1 for relevant data of concrete certificate, mix ratio list, pressure test report and waterproof concrete impermeability report.
3. Prestressing
The first floor beam is designed as post-tensioned bonded prestress, and its prestressed tendons are 1860MPa grade, φs 15.2 low relaxation steel strand; Bonded prestress is set in the embedded corrugated pipe, which is grouted with M50 micro-expansive cement slurry after tensioning. Prestressed steel strand, anchorage, grouting cement and other materials have quality guarantee and retest report. During the construction process, the supervisor will conduct on-site sampling and witness sampling, and the number of test blocks and test results meet the requirements of the acceptance specification, and keep complete prestressed tensioning records. See table 1 for the data of relevant raw material inspection reports.
4. Waterproof material
Waterproof materials are produced by Shanghai Taian Engineering Industry Co., Ltd., and the records of each review are complete. Concealed works are accepted by supervision units and full-time quality inspectors, and concealed inspection records are made in detail. See table 1 for the data of waterproof material certificate and retest report.
5. Reinforced concrete structure
The steel skeleton is manufactured and installed by Lingxin (Nantong) Heavy Industry Co., Ltd., and has a complete quality certificate of steel skeleton and a quality certificate of high-strength bolts. The entry materials, steel bar welding inspection, supervision, witness sampling, number of specimen groups, number of weld inspection and test results all meet the requirements of acceptance specifications.
V. Quality Control (Concealed Acceptance)
In order to ensure the realization of the quality objectives of this project, a quality management leading group of the project department is established, which is composed of the project manager as the team leader, the chief engineer and deputy manager as the deputy team leader, the deputy chief engineer, the quality inspection engineer and the heads of relevant departments. Each ZuoYeDui has full-time quality engineers and each team has part-time quality inspectors, forming a three-level quality management system. Strengthen the quality self-inspection and self-control system headed by the first manager, improve the internal inspection system, fully equip the quality management personnel, implement the supervision separation system between the engineering management department and the quality management department, base on the self-inspection and self-control, implement the responsibility to the people, strictly assess the rewards and punishments, and establish the pre-inspection and re-inspection system for important engineering structures and concealed works. The self-inspection system consists of two levels: the project department and the construction team. The project department is the core of self-inspection and internal control. The quality management department of the project department is the implementation unit, with the cooperation of the laboratory; The construction team shall set up full-time quality inspectors to conduct inspections according to the inspection methods of "tracking inspection", "self-inspection", "re-inspection" and "sampling inspection", and strictly implement the quality one-vote veto system. According to relevant laws, standards, specifications, design documents, engineering contracts and construction technology requirements, the self-inspection system refines and decomposes the quality objectives, assigns special personnel to be responsible for key parts, important working procedures and key links, and carries out construction quality tracking control. Self-inspection personnel must monitor the construction quality of each construction link, and carry out pay-off measurement, material test, process technology inspection and quality tracking inspection at any time to ensure the timeliness and effectiveness of quality inspection and control. Consciously carry out self-inspection, mutual inspection and handover inspection in the construction process, organize quality inspection regularly and irregularly, and strictly implement the reward and punishment system to ensure the realization of the goal of creating excellence. Strictly implement the daily sampling inspection system of the ten-day inspection of the team and the monthly inspection of the project department, and carry out control inspection in strict accordance with the high-quality engineering standards. All concealed engineering projects shall be inspected step by step by the team, construction team and project department. After passing the inspection, it shall be rechecked together with the supervision engineer. The inspection results should be filled in the acceptance form and signed by both parties. The measurement data must be rechecked by changing hands, reviewed by the chief engineer and reported to the supervision engineer for approval. On-site survey baselines, leveling points and related signs must be re-measured regularly to ensure that the measurement accuracy meets the specification requirements.
In the process of construction, * * * formed 652 hidden records and 46 1 construction records. Among them, there are 447 hidden piles, 0/52 hidden steel bars/KLOC-,8 hidden steel ribs and 27 hidden coiled materials. 18 hidden reinforcement for slope support; There are 447 records of drilling, 1 record of construction acceptance of bored pile with mud retaining wall, 1 record of construction acceptance of reinforcing cage, 65+0 records of underwater concrete construction of bored pile, 5 records of groove inspection of foundation pit, 3 records of prestressed tensioning and 3 records of waterproof effect of basement, etc.
Chapter III: Overview of foundation and foundation sub-project construction.
I. Overview of the Project:
Construction unit: Liucun Community Economic Union;
Design unit: Guangzhou Huangpu Architectural Design Institute;
Supervision unit: Guangzhou Hongyuan Construction Engineering Consulting Co., Ltd.;
Construction unit: Changchun Construction Co., Ltd.
The industrial workshop of Liucun Community Economic Union is located on the east side of Lily Third Road in the East Zone of Guangzhou Development Zone. Its main building function is Liucun community industrial workshop, 1 building, with 5 floors. The project covers an area of about 17 12 square meters, with a total construction area of 8964 square meters. The height of the main body is18.6m; The first floor is 5 meters high, and the other floors are 3.4 meters high. The engineering structure is cast-in-place reinforced concrete frame structure.
The foundation adopts static pressure prestressed high-strength pipe pile, with specifications of 500, type A, pile wall thickness 100mm, pile strength not less than C80, single pile bearing capacity characteristic value 1700KN, pile length 15-20m, pile bottom entering fully weathered layer not less than 4.0m, and final pressure control conditions are recompression flotation machine for 3 times. The depth of pile delivery shall not exceed 2m, and the bearing stratum at the pile end shall be completely weathered granite. The reinforcement of this project adopts HPB235 and HRB400.
Second, the project construction
The static pressure pile construction was completed from June 4th, 20xx to June 30th, 20xx, with a total time of 24 days. * * * There are 175 piles. See Construction Record of Static Pressure Concrete Precast Piles for details.
Three. Foundation pile detection
After the foundation construction is completed, the construction unit will entrust the construction quality of Guangzhou Development Zone.
From June 26th, 20xx to June 27th, 20xx, the Quantity Testing Center conducted the vertical compressive static load test of single pile, and detected three piles. All three items meet the design requirements and pass the test. On July 3rd, 20xx, the foundation pile was tested by low-pressure strain method. There are 35 piles tested this time, of which 20 are Class I piles, accounting for 57.2% of the tested piles. Class II piles 15, accounting for 42.8% of the tested piles. Class I and Class II tests are all qualified.
Four, pile foundation, foundation treatment division project construction
1.20xx started on August 10, and was completed on October 22nd/20xx. *** 14 subdivisional work. All subdivisional work shall be submitted to the supervision unit for examination and approval, and the examination and approval are all qualified.
2. The reinforcing bars are HPB235 and HRB400. The concrete cushion adopts C 15, and the pile core, bearing platform and ground beam all adopt C30 commercial concrete. 1~4/A~B underground is a fire pool with high waterproof requirements. According to the design requirements, the underground floor slab and wallboard concrete are poured separately, with large formwork, and the joint between floor slab and wallboard is treated with steel plate water stop. Pumping is adopted for concrete pouring, with concrete strength C30 and impermeability grade S6.
3. During the whole construction process, we will conscientiously implement the relevant national norms and technical management regulations, and often organize construction personnel to learn operating procedures, safety regulations and regular inspections to improve the technical level of workers and management personnel.
4. To ensure structural safety and accurate geometric dimensions. In the axis, elevation review, hidden acceptance, etc. , strictly implement the sub-item quality inspection system, implement the system of team self-inspection, mutual inspection and handover inspection, and the responsibility lies with people, so that the previous procedure is unqualified and the next procedure is not allowed to be constructed, ensuring the engineering quality.
5. In order to control the engineering quality, a special construction scheme has been made for the sub-projects such as pile foundation, pile foundation and foundation treatment.
6. Strengthen the inspection, inspection and block management of raw materials entering the site. The materials used in the construction shall be inspected according to the design and specification requirements. Details are as follows:
No quality and safety accidents occurred during the construction of this project, and the construction quality met the design and specification requirements. In terms of engineering technical data and engineering quality inspection and evaluation, all kinds of raw materials can be sampled and submitted for inspection according to the national supervision and witness sampling regulations. All materials used in the construction site have product quality information such as factory certificate. Materials such as cement, steel bar, sand, concrete test block, etc. have passed the inspection and meet the use requirements; The concrete specimens made by random sampling and their strength meet the design requirements. We also noticed that the data of engineering quality evaluation were collected and arranged in time. After statistical calculation, all the data meet the requirements and are complete and effective. The basic branch project quality self-evaluation is qualified.
Verb (abbreviation of verb) safety and civilization
1. safety: the project department adheres to the policy of "safety first, prevention first", and is equipped with a safety director and two safety officers to establish and improve the responsibility system for production safety and provide safety education and technical disclosure to all construction personnel who enter the site. Personnel without safety education and training are not allowed to work at their posts, and personnel with special types of work must hold relevant certificates. The installation and use of all electrical equipment, wires and cables shall comply with relevant operating procedures; Full-time personnel are responsible for the daily safety work on site. The company and the project department should regularly check the site safety work, rectify hidden dangers in time, and record and compile safety management information according to relevant requirements. No industrial accidents occurred during the whole construction process.
2. Civilized construction: according to the requirements of Guangzhou civilized construction inspection score, establish a regular inspection system for on-site construction; Stacked materials shall be arranged according to the general layout of construction and managed by special personnel; During the construction, keep the site and roads unblocked and the drainage system in good use; Construction waste can be cleaned up in time to ensure the cleanliness of the site.
In the whole construction process, we got the full support and help from the construction unit, design unit, supervision unit, quality inspection station and other departments and relevant personnel, thanking them for their strict inspection and supervision of this project, thus ensuring the smooth completion of this project. Here, I sincerely thank all units and departments for their support and concern for our work, and sincerely invite you to put forward valuable opinions on the shortcomings in our work, so that we can continuously improve and achieve better results in our future work.
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