Earth and stone construction plan

Preparation basis

1.1 Construction drawings

1.2 Main specifications and procedures

1. Foundation and foundation engineering construction quality acceptance specification GB50202— 2002

2. Unified Standard for Construction Quality Acceptance of Construction Projects GB50300—2001

3. Technical Regulations for Safety in the Use of Construction Machinery JGJ33—2001

1.3 Construction Organization Design:

2. Project Overview

Project Overview Construction scale covers an area of ??19475 m2 and construction area is 83482m2

Number of floors: 16 above ground and 3 underground floors

Building eaves height 60m

Elevation ±0.000 53.00 Outdoor 52.4 Base-13.7

The functional above-ground construction area of ??the building 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 arrangements, the foundation pit is surrounded by The slope is graded with a slope of 1:0.2, and the slope is supported by soil nail wall anchor spraying. Earth excavation will be carried out using mechanical large-scale excavation and manual removal of the reserved soil layer at the base. The amount of mechanical excavation is 170136m3, and the amount of manual excavation is 1925m3

3. Construction deployment

According to the precipitation observation, after the excavation conditions are met, excavation will begin in the direction from west to east. . Three WY160 backhoes, 20 dump trucks, and a truck crane are used (to lift the soil in the foundation pit when manually clearing the base soil layer). The specific steps are as follows:

4. Operation process

4.1 Earth excavation project

4.1.1 First place the slope top line and slope bottom line, and start excavation after re-testing and acceptance.

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. Reserve 20cm of soil for manual cleaning. (See foundation pit excavation profile for details)

4.1.3 The first step is to dig out the surface soil layer to 2m below the natural floor, proceed from west to east, and reserve side slopes during excavation. 20cm manual cleaning. Then dig the foundation soil in the center of the foundation pit to -3.5m, and reserve 8m around it to make a working surface for soil nail wall anchor construction. The slope will be trimmed as the soil is excavated, and the slope soil nail wall construction will be carried out (see the dewatering and slope protection plan for details) ). After the soil nail wall concrete reaches the allowable strength in the first step (usually 12 hours after the soil nail wall concrete injection is completed), the soil layer reserved around the first part of the working surface is excavated, and the slope is trimmed along with the excavation, and the slope is Soil nail wall construction.

4.1.4 The first step of excavation is completed, and the second step of excavation will begin after the soil-nailed wall concrete reaches the allowable strength. The excavator returns to the starting point of the first step of excavation and proceeds to the second step of excavation to -8m in the direction of the first step. The construction personnel also carry out slope modification and soil nail wall construction.

4.1.5 The second step of excavation is completed, and the third step of excavation will begin after the concrete of the soil nail wall reaches the allowable strength. The third step is to excavate to -12.8m, and carry out slope trimming and soil nail wall construction as the soil is excavated.

4.1.6 When the excavation is within 50cm from the bottom of the pit, the surveyor will draw out a 50cm horizontal line, nail horizontal elevation wooden wedges on the side of the trench, draw several datum points in the foundation pit, and pull through the line for leveling. .

4.1.7 The width of the bridleway is 4m and the slope is 15. When closing the horse track, two excavators were used to pour out most of the soil from the horse track. The remaining part was cleaned manually, lifted out by a crane, and scaffolding was set up for soil nail wall construction.

4.1.8 When the mechanical excavation reaches the last step, the surveyors immediately release the foundation slope line and foundation trench drilling point, and start the foundation trench drilling construction.

4.1.9 After the drilling is completed, the foundation trench shall be inspected and accepted. After passing the test, 20cm of reserved soil will be manually excavated, the 50cm standard rod shall be measured with a ruler, and the foundation elevation shall be checked at any time. And place the groove edge line on the cleaned base.

Manual soil removal is carried out backwards. If the trolley has to walk on the excavated base soil, it must be padded with wooden boards or thick iron sheets and the base soil must not be disturbed.

4.1.10 After the foundation trench is leveled, cover it with canvas at any time to prevent evaporation loss of moisture in the base soil, causing soil volume expansion, and proceed with the construction of next steps such as cushioning in a timely manner.

4.1.11 During construction, standard piles, observation points, and pipe networks should be protected, and ancient tomb cultural relics should be promptly applied to relevant departments for processing.

4.1.12 In order to prevent groundwater and rainwater from soaking the bottom of the tank, a 50cm wide temporary drainage ditch should be reserved 30cm away from the edge of the foundation pit, and temporary water pits should be set up at the corners. Each pit should be equipped with a pump The water pump can pump out the water accumulated in the pit at any time.

5. Quality acceptance standards for earthwork excavation projects

Item order items allowable deviation or allowable value (mm) Inspection method

Column base

Foundation trench excavation site leveling pipe inland (road) surface base layer

Artificial machinery

Main control project 1 Elevation -50 ±30 ±50 -50 -50 Level inspection

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

-50 +300

-100 +500

-150 +100 — Measure with theodolite and steel ruler

3 Slope design requires observation or inspection with a slope ruler

General items 1 Surface smoothness 20 20 50 20 20 Use 2m ruler and wedge feeler gauge to check

2 Base soil design requires observation or soil sample analysis

Note: The deviation of the ground (road) surface base is only applicable The base layer of the ground (road) surface is made directly on the excavation and filling.

6. Main management measures

6.1 Safety management and protective technical measures

Since this project is a high-rise building with a construction area of ??78,000 m2, according to our company’s professional Health and safety management manuals and procedural documents strictly control on-site safety protection. A safety management leading group is set up on site, and a full-time safety officer is assigned to the construction site. The deputy manager in charge of production is fully responsible for production safety and various safety education activities. The engineering department organizes relevant departments to conduct regular inspections of the site, and promptly organizes personnel to make rectifications if hidden dangers are discovered. Guaranteed no major accidents.

Posters, color codes, signs and slogans will be hung at the entrance, exit and dangerous areas according to the construction status of each stage, and all protective parts will be in place. All kinds of signs should be hung together and in eye-catching locations, complying with OHSAS18001 standards.

6.1.1 Protection of foundation pits

6.1.1.1 The underground pipe network must be explored during earth excavation to prevent accidents.

6.1.1.2 Set up two protective railings with φ48 steel pipes around 0.6m away from the edge of the foundation pit. The spacing between the poles is 4m, 1.8m above the natural floor, and the burial depth is 0.8m. Build a 120 brick wall 30cm high 0.5m away from the edge of the foundation pit, with 240×240 brick columns spaced 6m apart. It is not allowed to pile soil, pile materials and park machinery within 1m of the upper edge of the foundation pit. Heavy vehicles are not allowed to stay within 5m of the upper entrance of the anchor shotcrete support. Construction workers are strictly prohibited from jumping over the protective railings. Warning signs will be installed during foundation pit construction, and red light signs will be added at night.

6.1.2 Construction workers outside the foundation pit are not allowed to throw debris into the foundation pit, and when passing tools down the foundation pit, they must hold them firmly before letting go.

6.1.3 Personnel under the pit should rest away from the edge of the foundation pit and the grading area to prevent accidents.

6.1.4 Construction machinery must obey all commands, and personnel should try to stay away from the construction machinery. If necessary, notify the operator first and wait for a response before approaching.

6.2 On-site fire protection management measures

6.2.1 Establish a fire prevention leadership group, volunteer fire brigade, security committee, and comprehensive social management group at the construction site, and set up a leading cadre to specify Responsible for fire protection work, and establish a system of holding regular meetings every month;

6.2.2 The construction site work adheres to the work policy of "prevention first, combining prevention and fire protection", and conscientiously implements the "Chinese People's Congress and In accordance with the National Fire Protection Law and XX City's Fire Protection Regulations, we have implemented the fire prevention responsibility system step by step, and used various forms to conduct extensive publicity and education to the masses to ensure that everyone pays attention to fire protection work; at the same time, fire protection work has been included in the production management agenda. , have the same plan, layout, inspection, implementation, and evaluation as production;

6.2.3 All personnel participating in construction must undergo "four prevention" education and examinations before entering the site. Insist on conducting education once a month and before major festivals and social and political activities to learn various rules and regulations on site and national laws and regulations, so that each construction worker can achieve clear systems, safe production, and civilized construction;

6.2. 4 Non-flammable materials are used for temporary facilities on site, and the living, processing, warehousing, offices and projects under construction at the construction site are set up separately;

6.2.5 Classified special warehouse management of flammable and highly toxic items, strict management Warehouse entry and exit procedures. When operating flammable and explosive chemical dangerous goods, good ventilation must be ensured, and cross-operation with electrical, welding and other open flame operations is prohibited;

6.2.6 Strengthen the management of on-site open flame operations and strictly enforce the fire approval system. On-site fire certificates shall be issued by the security personnel in charge, and shall have written safety and fire prevention technical explanations.

6.2.7 Set up a smoking area on site, post smoking management requirements and signs in a prominent position, and provide cigarette butt containers and fire extinguishing equipment. Smoking should be done in the smoking area, and smoking is prohibited elsewhere on site;

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

6.2.9 Fire-fighting equipment at the construction site must be inspected, repaired, and inspected by security personnel. Ensure that fire extinguishing equipment is intact and effective, and do not allow others to move or use it without authorization; the width of the road at the construction site shall not be less than 3.5m;

6.2.10 For the protection of key parts and finished products on site, adhere to the principle of who is in charge and who According to the principle of whoever is responsible for the construction, who is responsible, the responsibility should be assigned to the person, and according to the actual situation on site, we should reduce the entrance and exit population and implement segmentation control. Specific measures for entry and exit of personnel shall be formulated by security personnel;

6.2.11 Equip key parts of the site (such as power distribution rooms, tower cranes, warehouses, etc.) with responsible and skilled personnel for operation and management, and establish Improve the job responsibility system and shift handover system, and carefully prepare shift records;

6.2.12 Leave two entrances and exits on site, and ensure that the walls are in good condition. Entrance and exit guards must strictly inspect vehicles and personnel entering and exiting, and no entry or exit should be allowed on site. Retain outsiders. Doors and windows of on-site offices, locker rooms, and warehouses must be strong and reliable. Set up bicycle sheds, centralized storage, and dedicated management on site;

6.2.13 Conduct a thorough review of construction personnel entering the site, adhere to the principle of review first before use, and be aware of key personnel and register them ;

6.2.14 Establish a guard system and a patrol protection system, set up two shifts of dedicated personnel on duty day and night, and keep records of duty. Passports must be issued for people and vehicles carrying construction materials in and out of the site, and other personnel who enter the construction site for business contact must be registered and can only enter with the permission of the guard;

6.2.15 Fire protection officer every day Conduct inspections on the use of fire and electricity at the construction site, and participate in civilized construction inspections every ten days; have the right to stop all violations of regulations, and security cadres have the right to criticize and punish those who violate public security and fire protection regulations until construction is stopped;

6.2.16 Establish and improve fire protection files, collect and organize information, and carefully record, organize, and record accidents and various hidden dangers that occur on site for future reference.

6.3 Construction site management measures

6.3.1 The construction site implements the principle of "whoever is in charge is responsible". The construction site project manager is fully responsible for the construction site management work, and everything is related to Units and individuals related to the construction activities of construction projects must obey management, and each subcontracting unit must accept the unified leadership, supervision and inspection of the general contracting unit;

6.3.2 The walls and fences at the construction site shall be according to the group’s regulations The group logo, corporate spirit and other contents are drawn according to CIS standards, making them solid and beautiful. Set up a main entrance and exit on the east side of the site, and the specific gate practices shall be implemented in accordance with the group company's corporate image visual identity specification manual;

6.3.3 Erect three flagpoles at the construction site to hoist the national flag, group and owner logo flags;

6.3.4 Set up a project sign in an obvious place in front of the gate of the site, no less than 700mm × 500mm, with white background and black imitation Song characters, indicating the name of the project, construction area, construction unit, design unit, supervision The unit, construction unit, and person in charge of the construction site set the completion date. The height of the signboard: the bottom edge is not less than 1.2m from the ground, and "one picture, two signs and three boards" with content that meets the requirements are set up inside the door, namely: construction site floor plan, safety counting sign, construction site management system sign, and safety production management System board, fire protection management system board, site sanitation system board;

6.3.5 Various temporary materials installed on site must meet the requirements. The on-site office uses the original two-story building; temporary buildings such as kitchens, warehouses, cement warehouses, etc. are made of bricks and covered with roofs. The indoor height is not less than 2.5m, and they are leak-proof and moisture-proof to meet the needs of use and are neat and beautiful; < /p>

6.3.6 Separate the construction area, office area and living area, and arrange greening on the construction site. Establish a strict management responsibility system, divide responsibility areas, set up obvious signboards, assign responsibility to different areas, and make the site and living area clean, civilized, and orderly;

6.3.7 Setting up work on the construction site Bulletin board, blackboard newspaper. The slogans on the site walls and dormitory exterior walls reflect the group consciousness and entrepreneurial spirit. All slogans and system signs on site should be written in a standardized, eye-catching and beautiful manner, and should be kept in good condition;

6.3.8 The construction road on site is a concrete pavement, which should be kept smooth. It is forbidden to pile materials and equipment on the road; there are feasible drainage measures in the rainy season. , equipped with 6 4-inch submersible pumps, and drainage ditches are set up on site to drain on-site rainwater into municipal rainwater pipes in a timely manner;

6.3.9 All temporarily stored construction materials entering the site must be in the location specified on the floor plan. Place them in place, and place all types of materials in categories. Steel bars, shelf tubes, square timbers, boards and other materials should be placed in the same line without mixing, and keep the materials on site neat and unified;

6.3.10 Inside and outside the building Clean up scattered debris in a timely manner, store construction waste and domestic waste separately, and remove them in a timely manner; keep the site clean and tidy, and arrange for dedicated personnel to clean the site every day;

6.3.11 It is strictly prohibited to stack materials and other materials on cantilevered structures Articles, finished and semi-finished products entering the site must have feasible protection measures;

6.3.12 Open defecation is strictly prohibited in the construction site. Intentional violation will result in increased penalties. Construction workers should save water and eliminate the phenomenon of long running water and long-lasting lights;

6.3.13 The installation and use of electrical lines and electrical facilities at the construction site must be erected in accordance with the construction organization design, and arbitrary wire connections are strictly prohibited. . Electrical and gas welding operations must be performed by qualified welders, electricians and other professional technicians;

6.3.14 All types of machinery at the construction site must be parked neatly and regularly in accordance with the locations specified in the construction site management floor plan. Carry out maintenance, establish a job responsibility system for various machinery operators, ensure that they work with certificates, and operations without certificates are strictly prohibited;

6.3.15 Eliminate fire hazards, improve fire-fighting facilities, strictly use fire systems, and do a good job Firefighting work. All construction workers must protect fire-fighting facilities, and are not allowed to damage or misappropriate fire-fighting equipment and equipment without authorization, are not allowed to bury or occupy fire-fighting water sources, are not allowed to occupy fire prevention distances, block fire-fighting passages, and are not allowed to 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 the construction process.

Enclose the woodworking room and take effective measures against vibrating construction machinery to reduce noise. Sprinkle appropriate amounts of water on site to reduce dust;

6.3.18 All management personnel at the construction site should wear badges.

6.4 Material management measures

6.4.1 When materials enter the site, the material storage area divided strictly according to the construction plan should be placed neatly, and the responsible area and responsible person should be marked;

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6.4.2 The storage area for various materials and tools should be compacted and leveled, with drainage facilities;

6.4.3 Materials and tools at the construction site should be stacked neatly and stably according to specifications, so that they are aligned at one end and in one line. , the markings are standardized and clear;

6.4.4 The cement is stored in the warehouse, with the door locked and managed by dedicated personnel. The stack height does not exceed 12 bags, and the gap between the bagged cement and the wall is not less than 15cm. The cement warehouse is poured Concrete 20cm above the ground, and the ground is calendered with cement mortar, fully enclosed with hollow bricks, and equipped with two iron doors for entry and exit, and the first-in, first-out principle is implemented;

6.4.5 Valuables, Flammable, explosive and toxic materials should be put into storage in a timely manner, managed by a special warehouse, and obvious signs should be added;

6.4.6 Remaining materials and packaging containers should be organized and classified, and stored separately from finished raw materials. Waste paint and oil materials should be stored separately. and packaging containers signed with the supplier, and the supplier will recycle them in a timely manner to avoid causing pollution;

6.4.7 The material warehouse should be kept clean, the material racks and materials should be reasonably placed, and should be kept by dedicated personnel. Establish strict procedures for receiving and returning materials;

6.4.8 Take necessary rain-proof, moisture-proof, sun-proof, anti-freeze, waterproof, explosion-proof and damage-proof measures for material storage at the construction site according to the material properties;

6.4.9 Adhere to the material acceptance system of more than two people, carefully inspect the product name, specification, model, packaging, trademark, quantity, and quality of the incoming materials, ask for material certificates, and leave detailed records;

6.4.10 There must be strict inspection systems and procedures for materials entering and exiting the site, and standards implementation procedures must be followed.

6.5 Environmental Protection Measures

Based on the characteristics of the location of the project, combined with the provisions of our company’s ISO1400l management manual and program documents, a project manager-led team was established consisting of technology, production, The environmental protection work leading group composed of materials, machinery and other departments has established a self-guarantee system for environmental protection at the construction site to ensure that responsibilities are assigned to each person. The following measures will be taken to reduce noise, dust and other pollution generated on site to reduce various types of pollution and noise nuisance to residents.

6.5.1 Measures to prevent dust and air pollution

6.5.1.1 The earthwork shall be constructed by a qualified transportation unit, and a transportation contract shall be signed, in which the company's environmental requirements shall be specified. Set up dedicated personnel to clean the wheels at the entrance and exit of the site, and take down the soil on the vehicle or cover it tightly. The highest point of the earthwork carried shall not exceed 50cm above the upper edge of the vehicle trough, and the edge shall not be 10cm higher than the upper edge of the vehicle trough. Construction debris or other bulk materials shall be loaded Materials shall not exceed the upper edge of the trough and shall not be spilled along the way;

6.5.1.2 The backfill soil reserved for the project shall be sprayed and covered to prevent dust;

6.5 .1.3 Adopt concrete hardening treatment for the construction road. The hardened road surface at the entrance and exit shall not be smaller than the width of the exit. A device for washing wheels shall be installed at the exit and a dedicated person shall be responsible for it;

6.5.1.4 On the east and west sides of the site Set up a temporary water pipe for sprinkling, and set up a sprinkler with sprinkler equipment. Sprinkle and clean the site and living area according to the site conditions to prevent dust:

6.5.1.5 Set up at the construction site At the garbage sorting station, construction garbage should be sorted and cleaned in a timely manner, and water should be sprayed to reduce dust;

6.5.1.6 Cement and other fine-grained bulk materials that are easy to fly should be stored in the warehouse or tightly covered;

6.5.1.7 The on-site canteen uses gas equipment and electric steamers for cooking, and uses liquefied petroleum gas equipment;

6.5.1.8 When dismantling the original building, sprinkle water at any time to reduce dust pollution to the environment.

6.5.2 Measures to prevent water pollution

6.5.2.1 A grease trap should be set up in the temporary canteen. Oil slicks and debris should be cleaned up no less than three times a month. The sewage should be filtered, sedimented and separated. The oil is then discharged into municipal sewer lines.

6.5.3 Measures to prevent noise pollution

6.5.3.1 On-site mixers, electric planers, electric saws, air compressors and other strong noisy machinery must be fully enclosed in sheds;

6.5.3.2 For equipment that cannot be closed, such as tower cranes, excavators, loaders, electric hammers, etc., the operating hours are strictly controlled and no operations are allowed from 22:00 in the evening to 6:00 in the morning of the next day;

6.5 .3.3 Establish and improve the management system for controlling man-made noise, and use radio communication equipment for signal workers' control tower cranes;

6.5.3.4 Noise value monitoring shall be carried out in accordance with the "Measurement Method for Noise at the Boundary of Construction Sites" (GB12524), during the earthwork construction stage Do not exceed 75 decibels during the day and 55 decibels at night, and test frequently; (6:00-22:00 is daytime, 22:00-6:00 is nighttime)

6.5.3.5 Do We will do a good job in supervision and inspection of environmental protection at the construction site. We will conduct inspections on various environmental work at the beginning, middle and end of each month, take corrective and preventive measures in a timely manner for existing problems, and do a good job in writing records and archiving.

6.6 Environmental sanitation management measures

6.6.1 On-site environmental sanitation management

6.6.1.1 A dedicated person should be assigned to the construction site to be responsible for tidying up and keeping the site clean and hygienic. Ensure that there is no accumulation of water at the construction site and that vehicles do not leave the site with sediment. Send people to sprinkle water every day to clean the construction roads, green and beautify the construction site;