1. Project overview
This project is a * * * greening project, covering an area of * * square meters. The project was built by * * company, designed by * *, constructed by * * and supervised by * * supervision company.
1-2. Construction conditions
All kinds of sundries in the construction site of this project have not been completely removed, and water and electricity have been connected to the site, which does not meet the conditions of "three links and one leveling". There are many overlapping constructions with other construction units, so it is necessary to clean up and construct at the same time, and coordinate the construction with other construction units.
1-3. Quality objectives
The quality goal of this project is to ensure excellence and strive for excellence.
2. Construction deployment
2- 1. Division of construction stages
This project has a large quantity of work and a tight time limit. If it is completed on time and with good quality, it must be carefully planned, reasonably arranged, exchange needed goods, and flow production. This project is planned to be divided into civil engineering, water and electricity installation engineering, seedling planting, garden sketch, road laying and ancillary works.
2-2. Construction period
Planned commencement date: YY month day.
Planned completion date: year month day.
Total calendar duration: days
3. Construction preparation
3- 1. Technical preparation
3- 1- 1 Arrange technicians to be familiar with drawings and conduct the blue prints.the design.
3- 1-2 According to the requirements of quantities and time limit for a project in the drawings, the schedule and construction organization design shall be arranged.
3- 1-3 overhaul measuring instruments, and put forward a preliminary labor and material plan.
3-2. Covering Plan
3-2- 1 If Party A can do its best, Party A will provide 2 temporary offices, 2 material warehouses and 3 rooms for coordination. If you have difficulties, it is recommended to rent a house outside.
3-3. Workforce Plan
Six concrete workers
30 ordinary workers
6 technicians
2 electricians
Bricklayer 10 person
Other jobs 10 people
A total of 64 people.
The above are the workers in the peak period, which can be adjusted according to the actual situation during construction.
3-4. List of construction organization personnel (see attached table)
3-5. Construction electricity plan
Concrete mixer 1 35kw
Mortar machine 1 3kw
Two frog rammers (6kw)
p = 1. 1×(k 1σp 1)/cosφ
= 1. 1×0.7×44/0.65
=52kw
Therefore, the power supply load should not be less than 52kw.
3-6. Construction Water Plan
According to the structural characteristics of this project and considering the difficulty of local water use, it is necessary to drill a simple well for water supply.
4. The main division of the project construction method
4- 1. Civil engineering
The present situation of the ground is land surface, which needs to be leveled and compacted.
4-2. Road Laying Works
4-2- 1. Basic therapy
Before construction, the base should be cleaned up and the elevation should be strictly controlled.
4-2-2. Bricks and plates should be strictly selected before the construction of paving material surface, and bricks and plates with color difference and specifications exceeding the allowable deviation shall not be used. Strictly control the water cement ratio in construction. After construction, keep it moist with sawdust and maintain it with water.
4-3. Water and electricity installation project
Construction setting-out-trenching-embedded pipe anticorrosion-embedded pipeline-earthwork backfilling
4-4. Garden Sketch Project
Construction setting-out-foundation excavation and filling-electrical pipeline embedding-modeling-pouring or prefabrication-installation
4-5. Plant planting
The first is the planting of saplings.
1, preparation before planting
1. 1 seedling raising
According to the engineering design drawings, the variety, quantity and specification of seedlings, the supply source of seedlings, the transportation to the planting site and the method of second transportation are listed. To conform to the specifications, healthy growth, no pests and diseases of seedlings should be marked one by one. High-quality seedlings should have the following conditions: the root system is developed and complete, the main heel is short and straight, there are many lateral roots and fibrous roots near the rhizome, and the root system will not split after emergence; The seedlings are thick and straight, not in vain; The main lateral branches are evenly distributed, which can form a perfect crown; No insect pests and mechanical damage.
1.2 soil preparation and setting-out before planting
According to the requirements of design drawings, the soil quality of the planting site should basically meet the needs of plant growth. If the soil is found to be too poor, fill in the planting soil in front of the planting temple to ensure the survival of the plants.
According to the drawings, find out the actual planting position of seedlings at the scene, spread ash points with white ash, and carry out fixed-point pay-off. Generally, determinant pay-off method and equidistant arc pay-off method are used.
1.3 tree hole excavation
Generally, tree holes are excavated 1-2 days before seedlings are transported. The size of planting hole depends on soil ball and root system. The hole with the soil ball should be larger than the soil ball 16-20 cm, and the depth of the hole is generally deeper than the ball 10-20 cm. When planting bare-rooted seedlings, the root system should be fully extended, and the diameter of tree holes must be consistent to avoid it.
There is a "pot pit" with a big bottom and a small bottom, and the excavated topsoil and core soil should be piled up separately.
2, seedling planting construction points
2. 1 planting time: try to shorten the time difference between seedling raising and seedling loading, so that seedlings can be planted as soon as possible.
2.2 transportation of seedlings: during transportation, all plants must be packaged to ensure that they will not be harmed by adverse weather such as the sun and wind. The roots of bare-rooted plants should be stained with mud and wrapped in straw bags. Evergreen trees and shrubs should be packed with soil balls and grass bags, and the soil balls should be kept intact before planting at the site.
2.3 Seedling planting: put the root system or soil ball of the seedling into the tree hole and center it, then erect the tree to ensure vertical, and then backfill the planting soil in layers. Generally, each layer is 20-30cm long, and fertile topsoil should be filled first. After filling the soil, lift the roots slightly, lengthen the city roots, and compact the soil with a shovel until the pit is filled up. The soil trace should be slightly flat, slightly higher than the pit mouth, to prevent the collapse and sinking after planting, resulting in water accumulation and rot at the base of the trunk. After the pit soil is filled up, surround the trees with residual soil, build a water retaining cofferdam and tamp it to facilitate watering, and the height is not less than 15cm.
2.4 Watering of seedlings: It is best to water newly planted seedlings with natural water, and then water must be watered once within 48 hours, followed by the second water, and the third water should be watered within 5- 10 days after the second water. Pay attention to the water must be poured thoroughly. After the third watering, the weir should be sealed in time, and a mound of 20-30cm high should be planted around the base of the trunk to keep the moisture in the soil.
Second, the establishment of lawn.
1, site leveling
Because the leveling of the site is directly related to the quality of lawn growth in the future, this process is particularly important.
1. 1 Preliminary leveling: firstly, pick up the surface garbage, then plow the land to a depth of not less than 30cm, and then break the clods. For the land with more magazines, 10mm* 10mm sieve can be used for screening to ensure the removal of sundries, and then the land can be leveled with an iron rake. Land with poor soil quality needs to be partially or completely replaced. The depth of soil replacement shall not be less than 30cm. After changing the soil, pour water to make it sink and compact, and then fill it. Repeat several times until the site is flat.
1.2 Textile for weeding and pests before turf establishment: In order to prevent the growth of weeds after turf establishment, in addition to roots and grass roots during land preparation, 75- 100 g herbicides such as glyphosate and paraquat can be sprayed per mu, which is generally used one month before turf establishment. In order to prevent insect pests, pesticides such as methamidophos and phoxim can be sprayed one week before lawn planting to achieve the effect of pest control.
1.3 Fertilization before planting grass: evenly spread 3kg/m2 of decomposed organic fertilizer and 0.08kg/m2 of compound fertilizer on the leveled ground, then turn over the soil, rake it and prepare for sowing.
2, lawn planting construction
After the land is leveled and raked, the lawn can be planted.
2. 1 sowing mode: the sowing amount is generally 8- 10g/m2, and the sowing mode is a combination of sowing and mechanical sowing. After sowing, cover the soil in time with a thickness of 0.5- 1 cm, and then flatten it with an iron roller to ensure even emergence. Watering and moisturizing, you can cover the lawn with grass curtains to reduce watering. After the grass seedlings are in full bloom, take down the grass curtain. Pay attention to take down the curtains on cloudy days or before evening to prevent grass seedlings from being burned by direct sunlight.
2.2 Lawn planting method: Dig a ditch with a depth of 5cm with a row spacing of 20-30cm on the flat ground, put the shredded grass blocks into the ditch, then fill the soil and step on it. In order to improve the survival rate and shorten the slow seedling stage, we should pay attention to two points in the process of transplanting: first, provide the lawn with appropriate root protection soil; Second, the time from digging grass to planting grass should be shortened as much as possible, and it is best to dig grass and plant it on the same day. After planting, it is necessary to fully irrigate, remove weeds and maintain for one month to form turf.
5. Measures to ensure construction quality
5- 1. Organizational management measures
5- 1- 1 Establish the quality assurance system and secondary quality assurance system of the company and the project department (see the attached table for details).
5- 1-2 Implement the project management under the responsibility system of the project manager, establish an authoritative quality management organization and equip a full-time quality inspection team. Strengthen the idea of "quality first, service for users", conduct regular quality inspection and appraisal, implement quality notification method, do a good job in quality evaluation of various sub-projects, and reward the excellent and punish the poor.
5- 1-3 Strengthen the acceptance system of concealed works, and no construction is allowed without the approval of the owner and supervision unit.
5- 1-4 Adhere to the technical disclosure of each type of work. Before the construction of each working procedure, detailed technical disclosure shall be made to the operation team to ensure that each operator is familiar with the technical requirements and operation points.
5- 1-5 adopts the method of combining self-inspection, mutual inspection, handover inspection and professional inspection, and implements the system of listing the main types of work, grades and quality grades on the wall.
5-2. Technical management measures
5-2- 1 In order to ensure the engineering quality, the quality control flow chart has been compiled for the main subdivisional works (such as earthwork, stone installation and paving works, etc.). ).
5-2-2 Before construction, theodolite, level and process control quality inspection equipment used for measurement and positioning shall be qualified, and measuring instruments shall be tested according to measurement standards during use.
5-2-3 Axis positioning piles shall be strictly protected from damage, and shall be rechecked regularly during construction. Axis control piles and total elevation control points shall be approved in writing by the owner before use.
5-2-4 All measurement observation points must be buried reliably and firmly.
5-2-5 Strictly control the quality of materials. Sand and stone must have a quality inspection report when they enter the site, and they can only be used after passing the inspection; The cement entering the site must have appearance warranty and certificate of conformity, and be rechecked in the laboratory. It can only be used if it is qualified. Other materials, such as square bricks, bluestones, etc., must have a certificate of approval and be used after necessary tests.
5-2-6 The construction shall be carried out in strict accordance with the drawings, and the modification and change of the drawings encountered in the construction shall be approved by the owner and the relevant formalities shall be handled before it can be carried out.
5-2-7 All site operators must obey the guidance and supervision of construction technicians and supervisors.
5-3. Measures to ensure the construction period
5-3- 1 Make full preparations before commencement and construction stage, such as being familiar with drawings, hoisting materials, erection of overlay, mechanical equipment, labor organization, material procurement, etc.
5-3-2 Work out a scientific and reasonable construction organization design with strong operability, and do a good job in connecting each process to avoid slowdown and shutdown.
5-3-3 Try to use mechanical operation to reduce the waste of human resources and speed up the construction progress.
5-3-4 Some subdivisional works should be constructed at night, and special measures should be taken during holidays and busy farming seasons to ensure the normal progress of the works.
5-4. Measures to ensure safety
5-4- 1 A safety leading group headed by the project manager is set up on the construction site to strengthen safety management, fire control management, on-site security work and field appearance management, and strive for a civilized construction site.
5-4-2 All construction personnel entering the construction site must carry out safety education, carry out the spirit of relevant safety documents, and learn on-site rules and regulations, thus attracting great attention to safety.
5-4-3 Establish and improve various safety management systems, especially electrical and mechanical management. Non-professionals are not allowed to connect wires and operate machinery without permission.
5-4-4 Regularly check and maintain the electrical circuit and connect the leakage protection device of hand-held electric tools.
5-4-5 Construction personnel must wear safety helmets when entering the site, and it is forbidden to enter the site after drinking.
5-5. Other guarantee measures
5-5- 1 site civilized construction measures
5-5- 1- 1 Put up posters on the construction site and hold regular meetings to emphasize the importance of civilized construction. Clean roads and sites at any time, and it is forbidden to urinate in the construction area.
5-5- 1-2 All kinds of ground materials, stones and timber entering the site shall be piled up according to the site planning. The road surface should be hardened at the site so as to pile up materials such as sand and gravel.
5-5-2. Saving measures
5-5-2- 1 The picking plan of technicians should be more accurate to avoid material shortage or surplus. In the process of construction, a quota acquisition system should be implemented, and the remaining materials on that day should be transported back to the work shed or yard and warehouse, and they should not be thrown at will.
5-5-2-2 Strengthen site management, reasonably organize materials and semi-finished products to enter the site, and pile them up according to the construction organization design scheme to reduce secondary handling and loss.
5-5-2-3 In the paving project, layout should be reasonable, and frame joints should be retained to reduce the phenomenon of brick cutting and the breakage rate of bricks.
5-5-2-4 Strengthen quality control, avoid repeated operations and achieve one-time acceptance.
5-5-2-5 Reasonably arrange the comprehensive construction schedule, shorten the construction period, and reduce labor and mechanical costs.
5-5-3. Protective measures to prevent environmental pollution
5-5-3- 1 The sewage from washing the concrete mixer and mortar machine shall not flow randomly, but a sump can be dug and sealed at the construction site, and the sewage from washing the mixer and mortar machine will flow into the sump and be discharged into the sewer after settling. Clean up and transport construction waste at any time during the construction process and pile it in the designated place.
5-5-3-2 When placing noisy machinery, try to stay away from the dormitory area and use it as little as possible at night.
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