1. 1 construction drawings

1.2 main specifications and procedures

1. Code for Acceptance of Construction Quality of Foundation and Foundation Engineering (GB50202—2002)

2. Unified Standard for Acceptance of Construction Quality of Building Engineering (GB 50300-2001+0)

3. Technical specification for safe use of construction machinery JGJ33-200 1

1.3 construction organization design:

2. Project overview

Project overview: The construction scale covers an area of 19475 m2, with a building area of 83482m2.

Number of floors: aboveground 16, and underground 3.

The building eaves are 60 meters high.

Elevation 0.000 outdoor 53.00 basement 52.4- 13.7

The functional building area above ground is 56934m2, including 38750m2 office building, 20856m2 commercial building and 6000m2 library. The underground construction area is 26448m2.

Structure type frame-shear wall

Foundation form Raft foundation

According to the site and construction arrangement, slope is adopted around the foundation pit, and the slope gradient is 1∶0.2, and the slope is supported by soil nailing wall and bolting and shotcreting. Earthwork excavation adopts mechanical excavation, and the reserved soil layer at the basement is removed manually. The mechanical excavation volume is 170 136m3, and the manual excavation volume is 1925m3.

3. Construction deployment

According to the precipitation observation, after the excavation conditions are met, the excavation starts from the walking direction from west to east. Three WY 160 backhoe excavators, 20 dump trucks and 1 truck crane are used to lift the foundation pit soil when cleaning the foundation soil manually. The specific steps are as follows:

4. Operation process

4. 1 Earthwork Excavation

4. 1.65438+

4. 1.2 Mechanical excavation is carried out in three steps, the first step is to dig 3.5m, the second step is to dig 4.5m, and the third step is to dig 4.8m. 20cm soil layer is reserved for manual cleaning. (See chapter group of foundation pit excavation for details)

4. 1.3 The first step is to remove the surface muck layer to 2m below the natural floor, and proceed from west to east, and reserve a slope of 20cm for manual cleaning during excavation. Dig the foundation soil in the center of the foundation pit to -3.5m, and reserve 8m around it as the working face for anchor construction of soil nailing wall. Trim the slope with excavation, and carry out soil nailing wall construction of the slope (see dewatering slope protection scheme for details). When the concrete of the soil nailing wall reaches the allowable strength in the first step (generally, after the concrete of the soil nailing wall is sprayed 12h), the soil layer of the working face reserved around the first part is excavated, and the slope is trimmed along with the excavation to construct the soil nailing wall of the slope.

4. 1.4 The first step of digging is over, and the second step of digging is started after the concrete of soil nailing wall reaches the allowable strength. The excavator returns to the starting point of the first excavation, and carries out the second excavation to -8m along the first walking direction. The construction personnel shall do a good job in slope trimming and soil nailing wall construction at the same time.

4. 1.5 The second excavation is over, and the third excavation is started after the concrete of soil nailing wall reaches the allowable strength. The third step is to excavate to-12.8 m, and carry out slope trimming and soil nailing wall construction along with the excavation.

4. 1.6 When the excavation is within 50cm from the bottom of the pit, surveyors will copy out the 50cm horizontal line, nail the horizontal elevation Xiao Mu wedge on the groove help, copy out several datum points in the foundation pit, and pull the line for leveling.

4. 1.7. The width is 4m and the slope is 15. When the track is closed, most of the track soil will be poured out by two excavators, the rest will be cleaned manually, hoisted out by crane, and scaffolding will be set up for soil nailing wall construction.

4. 1.8 When the mechanical excavation reaches the last step, the surveyors will immediately release the basement slope line and the exploration points of the foundation trench drilling, and start the exploration and construction of the foundation trench drilling.

4. 1.9 After drilling, the foundation trench shall be accepted. After passing the test, manually excavate 20cm of reserved soil, measure 50cm standard ruler with a ruler, and check the elevation of the basement at any time. And the edge of the groove is placed on the cleaned substrate. Manual soil removal is backward. If the trolley must walk on the excavated foundation soil, it must be padded with wooden boards or thick iron sheets, and the foundation soil shall not be disturbed.

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4. 1. 1 1 During the construction period, standard piles, observation points and pipe networks should be well protected, and an application should be made to the relevant departments in time to deal with the cultural relics of ancient tombs.

4. 1. 12 In order to prevent groundwater and rainwater from soaking the bottom of the pool, a temporary drain with a width of 30cm and a width of 50cm is reserved along the edge of the foundation pit, and a temporary puddle is set at the corner. Each pit is equipped with a water pump, and the water in the pit can be pumped out at any time.

5. The earthwork excavation engineering quality acceptance standard

Inspection method of allowable deviation or allowable value of sequential items (mm)

column base

basis

Leveling the ground (road) basement in the pipeline at the excavation site of the foundation trench.

Manual machinery

Main control project 1 elevation -50 30 50-50 50 level inspection.

2 Length and width (measured from the design center line to both sides) +200

-50 +300

- 100 +500

-150+ 100- theodolite and steel rule measurement

3 Slope design requires observation or slope scale inspection.

General project 1 surface flatness 20 20 50 20 20 check with 2m guide rule and wedge feeler.

2. Observe the design requirements of basal soil or analyze soil samples.

Note: The ground (road) foundation deviation is only applicable to the foundation directly excavated and filled.

6. Main management measures

6. 1 technical measures for safety management and protection

As this project is a high-rise building with a construction area of 78,000m2, the site safety protection is strictly controlled in accordance with the occupational health and safety management manual and program documents of our company. Set up a safety management leading group at the site, and set up a full-time security officer at the site. The deputy manager in charge of production is fully responsible for safety production and various safety education activities, and the engineering department organizes relevant departments to inspect the site regularly, and organizes personnel to rectify in time when hidden dangers are found. Make sure there is no serious accident.

According to the construction situation in each stage, posters, color codes, signs and slogans are hung at entrances and exits and dangerous areas, and all kinds of protective components are protected in place. All kinds of signs should be hung in a conspicuous position, in line with OHSAS 1800 1 standard.

6. 1. 1 foundation pit protection

6. 1. 1. 1 During earthwork excavation, the underground pipe network should be proved to prevent accidents.

6. 1. 1.2 Two protective railings are set with φ48 steel pipes about 0.6m away from the edge of the foundation pit, with a spacing of 4m between vertical poles, which is higher than the natural terrace 1.8m, with a buried depth of 0.8m.. 120, a brick wall of 0.5m away from the foundation pit and a height of 30cm and a spacing of 240×240 brick columns. It is forbidden to pile soil, materials and parking tools within the range of 1m at the top of the foundation pit. Heavy trucks are not allowed to stay within 5m of the upper mouth of bolting and shotcreting support. All construction personnel are prohibited from jumping over protective railings. Warning signs should be set during foundation pit construction and red light signs should be added at night.

6. 1.2 Construction personnel outside the foundation pit are not allowed to throw things into the foundation pit. When passing tools under the foundation pit, they should be firmly connected before letting go.

6. 1.3 people under the pit should stay away from the edge of the foundation pit and rest on the slope to prevent carelessness.

6. 1.4 All construction machinery should obey the command, and personnel should stay away from the construction machinery as far as possible. If necessary, the operator should be informed first, and personnel should not approach before they react.

6.2 On-site fire control and safety management measures

6.2. 1 Establish a fire prevention leading group, a voluntary fire brigade, a security council and a comprehensive social management team at the construction site, set up a leading cadre to be specifically responsible for fire control work, and establish a system of holding a regular meeting once a month;

6.2.2 Adhere to the working principle of "prevention first, combining prevention with elimination" in the construction site work, conscientiously implement the Fire Protection Law of People's Republic of China (PRC) and the Fire Protection Regulations of XX City, implement the fire prevention responsibility system step by step, and extensively carry out various forms of mass publicity and education to ensure that everyone attaches importance to fire control work; At the same time, the fire protection work will be included in the production management agenda, and it will be planned, arranged, inspected, implemented and assessed together with production;

6.2.3 Before entering the site, all personnel participating in the construction shall be educated and inspected on "Four Preventions". Adhere to the education once a month and before major festivals and social and political activities, learn the rules and regulations of the site and national laws and regulations, so that every construction worker can achieve clear system, safe production and civilized construction;

6.2.4 Non-flammable materials should be used for temporary facilities on site, and the living, processing, storage and office of the construction site should be set separately from the projects under construction;

6.2.5 Special warehouse management shall be implemented for inflammable and highly toxic articles, and the procedures for entering and leaving the warehouse shall be strict. When operating inflammable and explosive dangerous chemicals, it is necessary to ensure good ventilation, and it is strictly forbidden to cross operations with electrical, welding and other open flame operations;

6.2.6 Strengthen the management of on-site naked fire operation and strictly use the fire examination and approval system. On-site hot work certificate shall be issued by the person in charge of safety in a unified way, with written technical disclosure on safety and fire prevention.

6.2.7 Smoking area shall be set up on site, smoking management requirements and signs shall be posted in obvious positions, and cigarette butts containers and fire fighting equipment shall be equipped. Smoking should be carried out in the smoking area, and smoking is prohibited in other parts of the site;

6.2.8 The erection of on-site lighting lines and the installation of various electrical equipment must be operated by formal electricians, and non-electricians are not allowed to operate;

6.2.9 The fire-fighting equipment on the construction site shall be inspected and maintained by security personnel to ensure that the fire-fighting equipment is in good condition and effective, and no one shall move or use it indiscriminately without authorization; The width of the road on the construction site is not less than 3.5m；;

6.2. 10 adheres to the principle of who is in charge, who is in charge, who is responsible for construction and who is responsible for the protection of key parts and finished products on site, and the responsibility is implemented to people. According to the actual situation, reduce the population and control by sections. Access personnel, specific measures shall be formulated by security personnel;

6.2. 1 1 Assign responsible and skilled personnel to operate and manage key parts of the site (such as transformer room, tower crane, warehouse, etc. ), establish and improve the post responsibility system and handover system, and carefully record the handover situation;

6.2. 12 Two entrances are reserved at the site to ensure the fence is in good condition. Entrance guards should strictly check the vehicles and personnel entering and leaving the site, and outsiders are not allowed to stay at the site. The doors and windows of the field office, dressing room and warehouse shall be firm and reliable. Build a bicycle shed on site, store it centrally and manage it by special personnel;

6.2. 13 Conduct a comprehensive inspection of the construction personnel entering the site, adhere to the principle of inspection before use, and keep a clear mind of key personnel and register them;

6.2. 14 Establish a guard system and a patrol shield system, assign special personnel to be on duty day and night, and make records on duty. Personnel and vehicles carrying building materials in and out of the site shall be issued with key cards, and other personnel who enter the site for contact business shall register and enter after being approved by the doorman;

6.2. 15 Firefighters check the power consumption on site every day, and attend a civilized construction inspection every ten days; Have the right to stop all acts in violation of regulations, and security cadres have the right to criticize, educate and punish those who violate public security and fire control regulations until the construction is stopped;

6.2. 16 Establish and improve the fire fighting archives, do a good job in data collection and sorting, and carefully record, sort out and refer to the accidents and various hidden dangers that occurred at the site.

6.3 field capacity management measures on the construction site

6.3. 1 The principle of "whoever is in charge is responsible" shall be implemented in the construction site, and the on-site project manager shall be fully responsible for the management of the construction site. All units and individuals related to the construction activities of construction projects must obey the management, and all subcontractors must accept the unified leadership, supervision and inspection of the general contractor.

6.3.2 According to the CIS standard of the group, draw the group logo, enterprise spirit and other contents on the walls and enclosures of the construction site, so as to be firm and beautiful. The main entrances and exits are located on the east side of the site, and the specific methods of the gates are implemented in accordance with the Corporate Image Visual Identification Standard Manual of the Group Company.

6.3.3 Erect three flagpoles at the construction site, and hang the national flag, the group flag and the owner's flag;

6.3.4 The front side of the gate of the construction site shall be provided with an engineering bulletin board with a size of not less than 700mm×500mm and imitation of Song Dynasty on a white background, indicating the name of the project, the construction area, the construction unit, the design unit, the supervision unit, the construction unit, the person in charge of the construction site and the opening and completion date. The setting height of signboard: the bottom edge is not less than 1.2m from the ground, and there are "one map, two boards and three boards" at the entrance that meet the requirements, namely, the construction site layout plan, safety counting board, construction site management system board, safety production management system board, fire control management system board and site sanitation system board;

6.3.5 All temporary materials set on site must meet the requirements. The field office uses the original two-story building; Temporary rooms such as kitchen, warehouse and cement silo. Should be covered with bricks, indoor height not less than 2.5m, leak-proof and moisture-proof, neat and beautiful.

6.3.6 Construction area, office area and living area shall be separated, and the construction site shall be afforested. Establish a strict management responsibility system, divide responsibility areas, set up clear signs, and assign responsibilities to people, so as to make the site and living area clean, civilized and orderly;

6.3.7 Set up bulletin boards and blackboard newspapers at the construction site. The slogans on the wall of the construction site and the outer wall of the dormitory reflect the group consciousness and enterprise spirit. All slogans and system cards on site are written in a standard, eye-catching and beautiful way, and kept in good condition;

6.3.8 The on-site construction road is concrete pavement, which should be kept smooth. It is forbidden to pile up materials and equipment on the pavement. There are practical drainage measures in rainy season, equipped with six 4-inch submersible pumps, and drainage ditches are set on site to discharge the rainwater on site into municipal rainwater pipes in time;

6.3.9 All temporary storage building materials entering the site shall be put in place according to the location specified in the floor plan, and all kinds of materials shall be put in classification code, and materials such as steel bars, pipe racks, squares and plates shall be put in a straight line, and shall not be mixed, so as to keep the site materials neat and uniform;

6.3. 10 Clean up the sundries scattered inside and outside the building in time, store the construction garbage and domestic garbage separately, and remove them in time; Keep the site clean and tidy, and arrange special personnel to clean the site every day;

6.3. 1 1 It is forbidden to pile materials and other items at the cantilever structure, and the finished products and semi-finished products entering the site have practical protection measures;

6.3. 12 It is forbidden to urinate anywhere on the construction site. Intentional violation, aggravated punishment. Construction personnel should save water and put an end to the phenomenon of running water and ever-burning lamps;

6.3. 13 The installation and use of power lines and facilities on the construction site must be carried out in accordance with the construction organization design, and it is forbidden to pull wires and connect electricity at will. Electric and gas welding operations must be operated by qualified welders, electricians and other professional and technical personnel;

6.3. 14 All kinds of machinery on the construction site must be parked neatly according to the position specified in the construction site management layout, maintained regularly, and a post responsibility system shall be established for all kinds of machinery operators, so that they can work with certificates, and it is forbidden to operate without certificates;

6.3. 15 Eliminate fire hazards, improve fire control facilities, strictly use fire system, and do a good job in fire control. All construction personnel must protect fire-fighting facilities, and shall not damage or misappropriate fire-fighting equipment and equipment, bury or occupy fire-fighting water sources, occupy fire-fighting space, block fire exits or smoke in the construction site;

6.3. 16 All personnel entering the construction site must wear safety helmets, and non-construction personnel are not allowed to enter the construction site;

6.3. 17 Take effective measures to control dust during construction. Woodworking room should be closed, and vibration construction machinery should take effective measures to reduce noise. Sprinkle water on site to reduce dust;

6.3. 18 All management personnel on the construction site should wear badges.

6.4 material grazing measures

6.4. 1 When materials enter the site, the storage areas of materials and tools divided in strict accordance with the construction plan shall be neatly arranged, and the responsible areas and persons shall be marked;

6.4.2 The storage area of various materials shall be compacted and leveled, and drainage facilities shall be provided;

6.4.3 The materials on the construction site shall be packed neatly and stably according to the specifications, so as to be flush and lined up, with clear identification specifications;

6.4.4 Cement shall be stored in the warehouse, locked and managed by special personnel. The stacking height shall not exceed 12 bags, and the gap between the bagged cement and the wall shall not be less than 15cm. Concrete is poured in a cement warehouse 20cm above the ground, the ground is polished with cement mortar, completely enclosed with hollow bricks, and two iron gates are set for feeding and discharging, and the principle of first-in and first-out is implemented.

6.4.5 Valuables, inflammable, explosive and toxic substances shall be put into storage in time, which shall be in the charge of a special warehouse and clearly marked;

6.4.6 Surplus materials and packaging containers shall be stored separately from finished raw materials. The supplier shall sign an agreement to recycle waste paint, oil and packaging containers in time to avoid pollution.

6.4.7 The material warehouse shall be kept clean, the material racks and materials shall be placed reasonably, and kept by special personnel, and strict procedures for receiving and returning materials shall be established;

6.4.8 Take necessary measures to prevent rain, moisture, sun, frost, water, explosion and damage according to the material performance;

6.4.9 Adhere to the system of material acceptance by two or more people, carefully accept the name, specification, model, packaging, trademark, quantity and quality of the materials entering the site, ask for the material certificate, and leave detailed records;

6.4. 10 Materials entering and leaving the site shall have strict inspection systems and procedures, and shall be carried out according to standard implementation procedures.

6.5 Environmental protection measures

According to the characteristics of the project location, combined with the provisions of our company's ISO 1400l management manual and program documents, a leading group for environmental protection work, headed by the project manager and attended by departments such as technology, production, materials and machinery, was established, and a self-assurance system for environmental protection on the construction site was established, and the responsibility was implemented to people. In view of the noise, dust and other pollution generated at the site, the following measures are taken to reduce all kinds of pollution and noise nuisance.

6.5. 1 Measures to prevent dust and air pollution

6.5. 1. 1 Earthwork shall be constructed by a qualified transportation unit, and a transportation contract shall be signed, which clearly defines the company's environmental protection requirements. At the entrance and exit of the construction site, special personnel should be assigned to clean the wheels, and pat off the dirt or cover the car tightly. The highest point of earthwork for carrying the project shall not exceed 50cm of the upper edge of the car trough, and the edge shall not be higher than the upper edge of the car trough 10cm. The loading of construction waste residue or other bulk materials shall not exceed the upper edge of the tank, and it is strictly forbidden to scatter along the way.

6.5. 1.2 The backfill soil reserved in this project shall be covered by spraying to prevent dust;

6.5. 1.3 concrete hardening treatment is adopted for the construction road. The hardened pavement at the entrance and exit shall not be less than the width of the exit, and a wheel washing device shall be set at the exit, and a special person shall be responsible for it;

6.5. 1.4 temporary sprinkler pipes, sprinklers and sprinkler equipment shall be set on the east and west sides of the site, and the site and living quarters shall be cleaned by sprinkling water according to the site conditions to prevent dust:

6.5. 1.5 Set up a garbage sorting station at the construction site, sort and clean up the construction garbage in time, and sprinkle water to reduce dust;

6.5. 1.6 Fine-grained loose materials such as cement that are easy to fly are arranged to be stored in the warehouse or tightly covered;

6.5. 1.7 The on-site canteen uses gas equipment and electric steamer for cooking, and adopts liquefied petroleum gas device;

6.5. 1.8 When the original building is demolished, water shall be sprinkled at any time to reduce the environmental pollution caused by dust.

6.5.2 Measures to prevent water pollution

6.5.2. 1 The temporary canteen shall be provided with an oil separation tank, and the oil slick and sundries shall be cleaned at least three times a month, and the sewage shall be discharged into the municipal sewage pipeline after filtration, sedimentation and oil separation.

6.5.3 Measures to prevent noise pollution

6.5.3. 1 On-site mixers, planers, chainsaws, air compressors and other machinery with strong noise shall be fully enclosed;

For tower cranes, excavators, loaders, electric hammers and other equipment that cannot be closed, 6.5.3.2 strictly controls the operation time. , shall not be open from 22 pm to 6 am the next day;

6.5.3.3 established a sound management system to control man-made noise, and the bell man commanded the tower crane to use radio communication equipment;

The noise value of 6.5.3.4 should be monitored according to the Noise Measurement Method of Construction Site (GB 12524). During the earthwork construction, it should not exceed 75 decibels during the day and 55 decibels at night, and should be detected frequently. (6: 00-22: 00 is daytime, and 22: 00-6: 00 is night)

6.5.3.5 completes the supervision and inspection of environmental protection on the construction site, conducts an environmental inspection at the beginning, middle and end of each month, takes corrective and preventive measures for existing problems in time, and keeps written records and files.

6.6 Environmental health management measures

6.6. 1 Site Environmental Sanitation Management

6.6. 1. 1 The construction site shall be arranged by designated personnel to keep the site clean and tidy. Do the construction site without water and vehicles without muck. Send someone to sprinkle water every day to clean the construction road and beautify the construction site;