How the supervision engineer writes the side station supervision plan

The side station supervision plan includes the side station supervision scope, side station supervision content, side station personnel responsibilities, side station supervision procedures, etc. content. So, how should the supervision side station plan be written? Below is the method I compiled for the supervision engineer to write the supervision side station plan. I hope it will be helpful to you!

1. Scope of side station supervision:

Basic stage: earthwork backfilling, post-casting belt pouring, other structural concrete pouring, waterproof concrete pouring, membrane Processing of detailed structure of waterproof layer;

Main structure stage: beam-column node reinforcement concealment process and concrete pouring.

2. Side station supervision procedures:

1. For each sub-project that is subject to side station supervision, the contractor should submit a construction application to the project supervision department 24 hours in advance, and the general manager After the engineer confirms that the preparation work is ready, he signs the application form and arranges the side station supervision personnel to carry out the side station supervision.

2. The side station supervision personnel shall supervise at the construction site, promptly discover and deal with quality problems that arise during the side station supervision process, and keep the side station supervision records truthfully and accurately. If the supervision personnel of the side station and the on-site quality inspection personnel of the construction enterprise do not sign on the supervision record of the side station, the next construction process shall not be carried out.

3. When the side station supervision personnel are performing side station supervision, if they find that the construction enterprise has violated the mandatory standards for project construction, they should order the construction enterprise to make immediate rectifications; if it is found that its construction activities have or may endanger the quality of the project , shall report to the supervision engineer or chief supervision engineer in a timely manner, and the chief supervision engineer shall issue an order to partially suspend construction or take other emergency measures.

4. If side station supervision is not implemented or there is no side station supervision record for the construction of key parts and key processes that should be subject to side station supervision, the supervision engineer or chief supervision engineer shall not sign on the corresponding documents.

3. Responsibilities of on-site personnel:

1. Check the arrival of on-site quality inspection personnel of the construction unit, the arrival of special work personnel with certificates, and the preparation of construction machinery and building materials;

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2. Follow up on-site to supervise the construction execution plan of key parts, key processes and the construction standards of the project;

3. Verify the incoming building materials, building components, equipment and commercial concrete Quality inspection reports, etc., and can supervise the construction unit on site for inspection or entrust a qualified third party to conduct re-inspection;

4. Keep side station supervision records and supervision diaries, and keep the side station supervision original work material.

IV. Side station supervision content:

(1) Earthwork backfill quality supervision

1. The contractor should select advanced materials based on engineering geology, hydrology and other conditions. Prepare construction organization design or construction plan with the latest construction machinery and tools and reasonable construction methods, so as to carry out construction quickly, efficiently and cost-effectively.

2. Professional supervision engineers shall review the construction organization design or construction plan of the earthwork backfill project based on the civil construction drawings and engineering geological survey reports and supervise the implementation. The key is to control the backfill soil quality, backfill and compaction methods, and the dry soil mass density of the backfill soil to meet the design requirements and construction specifications.

3. Prior supervision of earthwork backfill construction quality

(1) Study the engineering geological survey report.

(2) Review the contractor’s construction organization design or construction technical plan.

(3) Review whether the backfill soil quality meets the design requirements.

4. Quality supervision during the construction process of earthworks

(1) The soil materials for backfill must comply with the design requirements and construction specifications.

(2) The fill must be compacted and compacted in layers according to regulations, and the sampling location and frequency must comply with the regulations.

When sampling and measuring the mass density of compacted dry soil, the pass rate should not be less than 90%. The difference between the lowest value of the mass density of unqualified dry soil and the design value should not be greater than 80kg/m2, and it cannot be concentrated in a certain area.

(2) Quality supervision of waterproof concrete projects

The waterproof concrete structure is both a load-bearing structure and waterproof. Basement leaks are primarily caused by poor construction quality. Supervision engineers should supervise contractors to strictly ensure construction quality.

1. Waterproof concrete construction process

Construction preparation → concrete cushion → erect one side of the formwork → tie steel bars → seal the other side of the formwork → pour concrete → curing → remove the formwork.

2. Prior supervision of waterproof concrete construction quality

(1) Review the contractor’s construction organization design or construction technical plan.

(2) Based on whether the groundwater contains corrosive media, review whether the selected cement variety is appropriate; the variety and dosage of admixtures should be determined by testing; the waterproof concrete mix ratio and anti-permeability label must be trial-matched Test and meet the design requirements; the quality and various indicators of concrete raw materials must comply with the construction and acceptance specifications.

(3) The groundwater level should be lowered to the lowest elevation of the bottom of the waterproofing project, and there should be no water in the foundation pit.

(4) The supply of concrete must satisfy the continuous pouring of the base plate without leaving any construction joints.

3. Quality supervision during the waterproof concrete construction process

(1) Review the positioning axis and elevation of the waterproof concrete project to ensure that it meets the design requirements. For the supervision of the formwork work of the floor and wall panels and the steel bar work, refer to the relevant parts of the main project.

(2) The number, buried location and elevation of wall-through pipe fittings and embedded pipe fittings must meet the design requirements; they must not be left out or drilled after construction: rust and welding slag should be removed from embedded pipe fittings , the embedded parts should be welded with water-stop rings and fixed firmly; both the single-embedded pipe and the wall casing need to be welded with water-stop rings and fully welded, and the embedded pipes should be welded firmly with the vertical and horizontal steel bars. After passing the inspection, apply for a concealed acceptance visa.

(3) Reinforced steel bars should be installed around the holes in accordance with the specifications; measures should be taken to prevent the concrete pouring under the holes from being dense, such as openings on the sides and leaving holes to ensure dense pouring.

(4) The electric wire conduit should ensure that no water enters the pipe, and it is strictly forbidden to squeeze the position of the electric wire conduit, switch box and other management parts during vibration.

(5) The base plate should be poured continuously, and no construction joints should be left. The horizontal construction joints of the wall panels should be set according to the design requirements and construction specifications: the construction joints should be processed according to the requirements of the design and construction acceptance specifications, that is, before pouring concrete, remove scum and chiseling, rinse and keep moist. First lay the cement mortar of the same grade and then pour the concrete.

(6) The treatment of the post-pouring belt; the formwork on both sides of the post-pouring belt must be made and installed to ensure that the concrete poured first is poured densely on both sides of the post-pouring belt; the difference between the post-pouring and the first-pouring The concrete time interval must meet the design requirements and be no less than 42 days; according to the design requirements, micro-expansion concrete is used to pour the post-pouring belt, and its strength level must not be lower than that of the concrete poured first, and it must be trial-mixed first, and the use is allowed only after the strength is qualified. Mix ratio; when pouring the strip after pouring, it must be treated according to the method of construction joints, and the curing period shall not be less than 28 days.

(7) The impermeability grade and strength grade of waterproof concrete must comply with the design requirements and construction specifications; the watering and curing of waterproof concrete shall not be less than 14 days and nights; if there is any doubt about the strength of waterproof concrete, you can Perform non-destructive testing.

(8) Before painting and filling the waterproof concrete structure, the appearance quality of the waterproof concrete must be checked to comply with the construction specifications, otherwise defects should be repaired. After passing the acceptance inspection, apply for a concealed project acceptance visa. The quality of the asphalt cement waterproofing layer must comply with the design requirements and construction specifications. After passing the acceptance inspection, apply for a concealed project acceptance visa.

(3) Quality Supervision of Concrete Projects

Concrete is a composite material composed of a variety of raw materials. The performance of concrete is not only related to the performance of its raw materials, but also to the mix ratio, especially the mix ratio. It is related to factors such as water-cement ratio, type and dosage of admixtures, concrete mixing, transportation, molding, and maintenance. When controlling the quality of concrete projects, professional supervision engineers must comprehensively consider the above-mentioned many factors or links that affect the performance of concrete, and take organizational and technical measures to ensure the quality of concrete projects.

1. Prior supervision of concrete project quality

(1) Review the construction organization design

① Be familiar with the general building plan and civil construction drawings, and according to the project Structural characteristics and specific conditions of the construction site, and review whether the organizational and technical measures taken in the construction organization design for concrete projects are reasonable. Special attention should be paid to the setting of the production, transportation and pouring sequence of concrete. For concrete construction in severe winter and hot summer, as well as the pouring of large-volume concrete, special construction plans should be formulated and corresponding measures should be taken.

② If concrete is mixed at the construction site, overall consideration should be given to the layout of the concrete mixing station, cement warehouse, and sand and gravel yard. The sand and gravel yard should be separated and the sand and gravel should not be mixed with each other; there should be a certain reserve The quantity can ensure continuous production of coagulation; the sand and gravel should be more convenient for entering, unloading and weighing.

③If you use commercial concrete, you should choose a commercial concrete station that is not too far away and has a production license. Propose concrete quality requirements at the unloading location based on construction requirements.

(2) Inspection of concrete production equipment and construction machinery

① The mixer should be equipped to meet the needs of the concrete pouring volume and there should be a backup mixer. The water adding system of the mixer should be accurate and reliable. *.

② Raw materials must be weighed, and the measuring device must be calibrated correctly.

③ The horizontal transport tools and vertical transport machinery of concrete should meet the requirements for the quantity of concrete poured, and the operation should be reliable. The performance of the vibrator (device) must be satisfactory.

④ Inspection The concrete upper slump and the test mold for making the test block must be matched.

(3) Supervision of raw materials

① The quality standards, inspection methods and approval procedures for cement, sand, stone, admixtures and concrete must be in accordance with relevant regulations and no harmful minerals should be used. of aggregate.

② Bulk cement should be stored according to categories, and bagged cement should be stored in batches by category on wooden partitions more than 300mm2 above the ground; the stacking height should not be too high, and effective measures should be taken to avoid moisture. Clumping.

③Sand and stones should be stored separately according to types and specifications on flat ground without water accumulation to avoid mixing with foreign matter.

④Admixtures should be stored according to different varieties and respective requirements to prevent mixing, and attention should be paid to the failure of expired additives. The water used for mixing concrete should meet the corresponding standards.

(4) Review the concrete mix ratio. According to the structural design requirements, professional supervision engineers check whether the concrete mix ratio is correct.

(5) Sign the concrete pouring order

The chief supervisory engineer signs the pouring order after the steel bar project, formwork project, water, electricity, heating, ventilation project and concrete pouring preparation acceptance are approved. make.

2. Quality supervision during the concrete construction process:

(1) Inspection of concrete mixing

Professional supervision engineers must pay attention to the concrete mixing process Carry out follow-up inspections, the inspection contents include:

① The weighing of raw materials and the control of water addition should be accurate;

② The order of adding materials and mixing time should meet the specification requirements;

③Measure the slump and randomly take samples to make test blocks.

(2) Concrete transportation

If commercial concrete is used, use a concrete mixer truck to transport it. Affected by time and temperature factors during transportation, the workability of concrete will decrease. Therefore, the slump should be measured at the pouring site.

After the workability is reduced, attention should be paid to the concrete pouring and vibrating process to avoid problems such as honeycombs and holes that are not dense during vibration.

The duration from when the concrete is discharged from the mixer to the completion of pouring shall not exceed the specifications.

(3) Concrete pouring, joining and vibrating

① The order and method of concrete pouring should be carefully considered in advance. For large volumes and large areas of concrete, the pouring, layering, and segmentation must be reasonable; the intervals between layers and segments must be planned well. Before the concrete of the previous layer or segment is initially set, the concrete of the next layer or segment must be poured and vibrated. The pounder should be inserted into the next layer.

② When pouring vertical structures, methods such as stringing holes and opening holes should be used according to the structural form to ensure that segregation does not occur during concrete pouring and that each part is poured densely.

③ Carefully pour the areas where there are many reinforcements and embedded parts, vibrate them tightly, and avoid touching the steel bars and embedded parts.

④Contractors should be urged to strengthen management and ensure that operators strictly follow concrete construction operating procedures.

(4) Maintenance of concrete

The maintenance of concrete is often not taken seriously. When concrete is poured in a natural environment, the water in the concrete will continue to lose during the setting process, making it difficult to maintain the cement. hydration reaction. Supervision engineers should attach great importance to this and urge contractors to send dedicated personnel to maintain the concrete. After concrete is poured, it is necessary to avoid the harmful effects of freezing and rapid changes in temperature. It is also necessary to prevent shock, vibration and premature loading during the hardening process. Specifically, contractors are not allowed to work on concrete until its strength reaches 1.2N/mm2.

(5) Inspection of concrete quality and repair of defects

① Determine whether the poured concrete reaches the strength required by the design based on the strength of the concrete test block, and inspect the concrete structure after the formwork is removed Whether the deviation exceeds the specification requirements;

② When honeycombs, pitted surfaces, exposed reinforcements or even holes are found in the concrete structure, the contractor is not allowed to repair it by himself, but must make detailed records and report it to a professional supervision engineer for inspection, and then Defects will be repaired according to their severity. Defects that affect structural performance must be studied and dealt with jointly with the design unit.

(4) Quality supervision of steel bar projects

Steel bar projects are the backbone of reinforced concrete structures. The pre-inspection of the steel bar project is to supervise the contractor's material quality, steel bar processing and binding, all of which must comply with the design drawings and construction specifications. 1. Be familiar with the structural construction drawings, and clearly design the types, specifications, binding requirements of steel bars, and the special treatment of reinforcement in certain parts of the structure. Drawing review records and design change notices related to changes in reinforcement should be marked on the corresponding structural drawings in a timely manner to avoid forgetting and causing mistakes. Understand the provisions of steel construction measures in the code.

2. Check the incoming inspection of raw materials

(1) The types of steel bars must meet the design requirements. The steel bars entering the site have factory quality certificates and test reports. The surface of the steel bars Or each bundle (coil) of steel bars should be marked.

(2) The performance of steel bars must meet the specification requirements. The steel bars entering the site should be inspected in batches according to heat (batch) number and diameter. Take samples according to relevant standards and conduct physical and mechanical property tests.

(3) Supervise the contractor to transport qualified steel into the steel bar yard in a timely manner, stack it neatly, put labels on it, and take effective measures to avoid corrosion or oil stains on the steel bars.

3. For the cutting and processing of steel bars, the contractor’s technicians should be required to conduct detailed technical explanations of the steel bar work. The supervision engineer should inspect the formed steel bars, find any problems, and promptly notify the contractor to make corrections.

4. When welding steel bars, professional supervision engineers should first check the welder’s welder examination certificate. Before formal welding, the welder must be supervised to conduct trial welding according to the on-site construction conditions. Only after passing the inspection can he be approved to work. The steel bar welded joints should comply with the specification requirements, and according to the relevant provisions of the "Steel Bar Welded Joint Test Methods", samples of the welded joints should be taken for inspection.

5. During the steel bar tying process, professional supervision engineers should go to the site to inspect, find problems, point them out in time, and ask them to correct them. After the steel bars are tied and the contractor passes the self-inspection, the steel bar project concealed acceptance form must be filled in.

(1) During the acceptance inspection, the professional supervision engineer should check the specifications, quantity, spacing, length, anchoring length, joint settings, etc. of the tied steel bars according to the structural construction drawings to see whether they meet the design requirements and structural measures;

(2) The stirrups in the stirrup density area of ??the frame nodes and the additional hanging bars or stirrups on the beams where concentrated loads are exerted must not be missed. Thick plates and wall panels with double-layer reinforcement , braces and hooks should be provided as required. The strength, thickness, and position of the pads used to control the protective layer of steel bars should comply with specification requirements.

6. The positions of embedded parts and reserved holes should be correct and secure, and the reinforcement of steel bars around the holes should meet the design requirements.

7. Reinforced steel bars shall not be used as arbitrary substitutes. If you want to use it instead, you must obtain the consent of the design unit and go through the change procedures. Professional supervision engineers shall inspect and accept the steel bars accordingly. When pouring concrete, professional supervision engineers should urge the contractor to send someone to arrange the steel bars.

(5) Quality supervision of membrane waterproofing layer project

1. Preliminary supervision of membrane waterproofing construction quality

(1) Check the materials used for membrane waterproofing Check whether the materials meet the design requirements and construction specifications, and check the certificate and test report.

(2) The base surface of the rolled material must be firm, dry, and free of sand and hollows; the surface of the base layer should be smooth, and the maximum gap between the base layer and the 2m ruler should not exceed 3mm. The surface should be clean; the yin and yang corners should be made into arcs or obtuse angles.

2. Quality supervision during the membrane waterproofing construction process

(1) Follow up to check whether the waterproofing materials meet the requirements, and check whether the cold base oil meets the requirements of the construction specifications. After passing the acceptance inspection, apply for a concealed project acceptance visa.

(2) The membrane waterproofing layer and its additional layer of deformation joints, embedded pipe fittings, yin and yang angles, turning points and other special parts must comply with the design requirements and construction specifications. After passing the acceptance Apply for concealed project acceptance visa.

(3) The laying method, overlapping and closing of the membrane waterproof layer must comply with the construction specifications. Make sure the bonding is firm and tight, the seams are tightly sealed, and there are no defects such as damage or hollowing. In addition, the paving thickness must also be ensured. The membrane waterproof layer and the protective layer are firmly bonded, tightly combined, and have uniform viscosity.

(4) After passing the acceptance of the membrane waterproof layer, apply for a concealed project acceptance visa.

3. When accepting the completion of the underground waterproofing project, the contractor should provide the following information

(1) Underground waterproofing project positioning and laying out measurement records and acceptance certificate;

(2) Raw material factory quality certification documents, test reports and inspection records, and mix ratio notices;

(3) Records of handling major technical issues during the construction process and engineering change records

(4) Concealed project acceptance record and sub-project quality inspection and evaluation form. ;