20 17 model essay on special construction scheme for safety protection 1 1. basis of compilation
(1) Two-stage construction drawing design document of Nanwei 4th Road underpass tunnel project in Shannan New District of Huainan City.
⑵ The implementation construction organization design of south latitude 4th Road underpass tunnel project in Shannan New District of Huainan City.
(3) Relevant national safety operation procedures and relevant safety regulations.
(4) Construction safety inspection standard (JGJ59-99).
2. Project overview
The project scope of Nanwei 4th Road Tunnel starts from the east of Jinger South Road 12, starts from k0+48 1, ends at the west of Jinger South Road 13, and ends at k0+984, with a total length of 503m ... The tunnel under Nanwei 4th Road is a shallow tunnel with a main starting point of K0+49/KLOC. Among them, the buried length of the tunnel is 182m, the open-cut length is 299m, and cut and cover construction is adopted.
3. Structure diagram
3. 1 construction preparation
3. 1. 1 indoor technical preparation
(1) The project department has conducted pre-job safety training and safety disclosure for the construction personnel according to the standardized requirements;
(2) Seriously implement the safety technical standards, specifications, procedures and regulations, methods, instructions and decisions issued by superiors, and organize workers to study before construction in strict accordance with the safety construction specifications; Strictly implement the listing system;
⑶ Measures for construction safety, quality, progress, environmental protection, soil and water conservation and civilized construction have been formulated to ensure construction safety, quality and progress.
3. 1.2 site technical preparation
Collect all kinds of external technical data involved in the construction operation layer. Living and office facilities are complete to meet the needs of management and technical personnel entering the site for living and office.
3.2 Site preparation
(1) The construction access road and the temporary bridge have been connected, which can ensure the construction transportation, and the three links and one leveling on the construction site;
⑵ The materials and safety warning signs required for the safety fence of foundation pit excavation have entered the site.
3.3 Machinery and staffing
Main mechanical equipment: 4 electric welding machines and 2 cutting saws.
Staffing: 4 welders, 6 bricklayers and 6 handymen.
4. Construction requirements
4. 1 construction preparation
(1) Before construction, the technical personnel of the engineering department shall measure and pay off, reasonably arrange the investment of construction equipment and personnel, and prepare all kinds of materials and safety warning signs required for safety protection in advance;
(2) Full-time security officer directs construction equipment to ensure safe construction;
4.2 Construction Technology
4.2. 1 construction process
Measuring unreeling? Masonry 20cm high 12 brick wall? Install vertical steel pipes? Welding transverse steel pipes and steel bars? Apply safety warning paint? Hang a safety mesh safety net.
Fence setting
Because the excavation depth is more than 2m, it is required to set up safety protective railings and hang a dense mesh safety net to prevent danger. Set up a safety fence according to the following requirements:
(1) All safety fence railings are connected by welding;
(2) The exposed height of the vertical pole is 1.2m, the buried depth is 50cm, and it is set inside the open drain outside the foundation pit, and the horizontal spacing of the vertical pole is 2m;
(3) The crossbar is double-layered up and down with a spacing of 60cm.
④ Brick walls with a height of 20cm and a height of 12 shall be set at the bottom, and steel bars shall be set horizontally 3cm above the brick surface, which is convenient for hanging a safety net.
(5) The upper and lower foundation pits are reserved with a width of100 cm;
6. The railings should be painted with black and yellow paint, with a spacing of 40 cm, as a warning;
⑦ Hang a dense mesh safety net on the railing;
End up hanging safety warning signs in the eye-catching position of the railing (warning signs are uniformly produced and distributed by the project department). 5 Safety objectives, safety assurance system and measures
5. 1 security objectives
Insist? Safety first, prevention first? Policy, establish and improve the safety management organization, improve the safety production guarantee system, put an end to particularly serious, extraordinarily serious and extraordinarily serious accidents, put an end to fatal accidents and traffic accidents, and prevent the occurrence of general accidents. Put an end to all liability accidents and ensure that people's lives and property are not damaged. Create a safe production standard site.
5.2 Safety Management Organization
Project intends to set up a safety production leading group, with the project manager as the team leader, the deputy manager as the deputy team leader, and the heads of various functional departments and construction labor teams as team members. Safety and Quality Department is responsible for project safety supervision and daily work. The construction site is equipped with two part-time safety officers who are responsible for the safety and security of all employees. The team shall have full-time security officers, and the team shall have part-time security officers to form a safety system with full participation.
5.3 Safety guarantee system
7.3. 1 Establish the responsibility system for production safety.
The team and the leaders of the project department headed by the project manager signed a letter of responsibility for safety assurance, making it clear that the project manager is the first person responsible for production safety and the deputy project manager is the person directly responsible for production safety.
The project manager signs the responsibility certificate for production safety with the relevant departments and the person in charge of the construction labor service team, the deputy project manager signs the responsibility certificate for production safety with key positions, and the chief project engineer signs the responsibility certificate for technical safety with the competent engineer.
Implement the responsibility system for project safety management at all levels and establish the responsibility system for production safety at all levels; Establish various safety production rules and regulations, and prepare safety operation procedures for each type of work; Establish an internal evaluation system; Ensure that safety assurance measures are implemented at all levels.
7.3.2 Safety production guarantee system
According to the requirements of GB/T2800 1-2008 occupational health and safety management system standard, the project safety production guarantee system is established, the safety guarantee responsibility system is formulated, and safety contracts are signed step by step to achieve the goal of full participation and comprehensive management. Strictly implement the current technical specifications for highway engineering construction safety. And in strict accordance with the guarantee plan and the safety requirements of the special construction team for management and implementation. While preparing the construction technical scheme, prepare the corresponding safety technical measures for each sub-project to ensure the realization of safety management objectives.
5.4 Safety production guarantee measures
5.4. 1 Establish and improve various safety systems.
According to the unit's safety production management measures, combined with the characteristics of this project, formulate targeted safety management system; Operating requirements and safe operating system of all kinds of machinery; Electricity safety instructions and line erection and maintenance operation system; Serving road traffic and maintaining the operating system; Safe working system for aerial work; Safe operation system of the construction site; Fire prevention and wind prevention measures at the construction site; Safe operating system for lifting operation; Setting and maintenance measures of various safety signs.
5.4.2 Education and training on production safety
Before the start of each working procedure of foundation pit excavation, the security department or the engineering department shall conduct pre-job safety education for all employees and make records. The contents of education include: safety technical knowledge, operating rules of each type of work, safety system, engineering characteristics and hazards of engineering projects, etc. Only after passing the exam can they go to work. The Construction Technology Department organizes technical disclosure for employees, explaining the main points of operating procedures, the hazards of the project, taking corresponding preventive measures, and matters needing attention in construction. Personnel engaged in electrical appliances, lifting, aerial work, welding, motor vehicle driving, tensioning and other special types of work have received professional training. Party B can only work with certificates after obtaining the safety operation certificate. In addition to general safety education, professional safety technical training for this type of work is also carried out.
In addition to the daily general safety education and publicity, the full-time safety officer of the project should also make full use of blackboard newspapers, warning signs and other forms to popularize safety knowledge.
Strengthen safety awareness by deepening safety education. Construction personnel must receive safety education and technical training before taking up their posts, remember? Safety first? The safety officer insists on the purpose of holding relevant certificates.
5.4.3 Strengthen site management to promote safety in production.
Strengthening site safety management is the key to improve construction safety. On-site safety management aims at creating a safety production standard site, and comprehensively implements various rules and regulations and safety technical measures for safety production. Production personnel must be in charge of safety, and all levels from the project manager to the team leader should put safety construction in the first place, be strict in requirements and management, grasp typical examples and set an example, and constantly improve the management level of safety production.
20 17 Model essay on special construction scheme for safety protection 2 I. Basis for compilation
1, the building construction safety inspection standard (JGJ59? 99)
2, Hebei province "building construction safety inspection standards" implementation details
3. Practical building construction safety manual
4, construction organization design and construction drawings
Second, the project overview
Qinhuangdao coastline landscape construction project bird natural history project is located in the bird ecological protection viewing area at the southern end of the planned land, northeast of the intersection of Gechi Road and Haibin Avenue. The building is one floor, with a building height of 9.3m, a total construction area of 1949.5m2 and a construction area of 29 16. 1m2, in which the outdoor wooden platform and trestle have a construction area of 966.6. The construction project is a Class II building, with a fire resistance rating of Class I and a waterproof rating of Class II. The 50-year high tide level 1.923m, and the seismic fortification intensity are all 7 degrees. The design grade of foundation is Grade B, the seismic grade of frame structure is Grade III, and the design service life of structure is 50 years. During the construction period, a tower crane and two material hoists are set as the main vertical transportation tools.
Third, the content of safety protection
1、? Sambo? Mainly refers to the safety protection articles often used in the construction site: safety helmet, safety belt and safety net. ? Sambo? The quality and correct use of products are very important for giving full play to their safety protection functions and preventing accidents.
2、? Four? Mainly refers to the stairs, elevator wellhead, reserved holes, manhole, etc. Appear in the process of building construction. The above-mentioned holes in the project under construction should be protected according to the specific conditions, and corresponding protection measures should be taken according to the requirements of the specification.
3. In the construction site, when there is no enclosure on the edge of the working face or the enclosure height is less than 80cm, it is called edge operation, such as the edge of foundation pit, the edge of unloading platform, the edge of frame structure floor roof and the edge of overhanging eaves. When working near the border, solid and feasible safety protection facilities must be set up.
4. Other protective parts include: cross-operation parts, etc.
? Four? Other openings should be equipped with protective railings, stamping parts, safety nets and protective doors according to the actual situation.
(1) Protection of various reserved holes
1) The openings on floors, roofs and platforms with short sides less than 25cm but more than 2.5cm must be covered with solid cover plates, and the cover plates must ensure that they do not move.
2) The holes with a side length of 2550cm on the floor surface, the holes when installing prefabricated components, and the holes formed by temporary missing parts shall be covered with wood and bamboo cover plates, which shall remain stable and shall not be moved.
3) For the hole with a side length of 50 150cm on the floor, fasteners should be set to buckle the steel pipe grid, and wooden scaffolding or bamboo basketry should be spread all over; Or use the steel mesh that runs through the concrete slab as a protective net (the spacing between steel meshes shall not be greater than 20cm).
4) The hole above the floor is longer than 150cm. A protective railing with a height of 1.2m must be set around the hole, and a safety flat screen should be set below the hole.
5) Garbage wells and flues should be eliminated with the building or installation of floor slabs, or protected with reference to reserved holes. In the construction of pipeline wells, in addition to the above requirements, obvious signs should be set up.
6) For the vertical hole on the wall, all the holes that fall to the ground shall be equipped with stereotyped and tooled protective doors (the spacing between the door grids should not be greater than 15cm) or protective railings (the height should not be less than 1.2m, with upper and lower passages), and foot boards shall be set.
7) When the vertical hole runs from the bottom to the floor or the window sill with the bottom below 80cm, if the lateral drop is more than 2m, a temporary guardrail with a height of 1.2m shall be added.
8) Other vertical holes and openings that are in danger of falling to people and things nearby should be covered or protected, and measures should be taken to fix their positions.
(2) Protection of stairs
1) stair handrails should be installed in time after the stair tread is removed, otherwise the height along both sides of the stair section should be 1. 1.2m high protective railing.
2) In addition to setting protective doors (fences) as required, a safety flat net should be fixed on the first floor of the well, and a safety flat net should be hung on every two floors until10m.
Trilateral protection
Border protection must be based on different border workplaces, set up different protective facilities, such as protective railings and safety nets.
1, limb protection shall meet the following requirements:
(1) Around the foundation pit, protective railings shall be set around the balcony, material platform and platform, awning and cornice, and roof and floor without external scaffolding. (2) Stairs and stairs constructed in layers must be fortified with railings. .
(3) Temporary guardrails should also be set on both sides of the passage connecting vertical transportation facilities such as material hoists and external elevators with buildings, and safety protection sheds should be installed on the upper part of the ground passage. For all kinds of vertical transportation receiving platforms, in addition to the protective railings on both sides, the platform mouth should also be provided with safety doors or movable protective railings.
2. Specifications and connection requirements of limb protective railings
(1) Steel pipe handrails and handrails are made of Ф 48 steel feet.
⑵ The diameter of the upper reinforcement shall be not less than 16mm, the diameter of the lower bar shall be not less than 14mm, and the diameter of the railing post shall be not less than 18 mm, which shall be fixed by electric welding or galvanized steel wire binding.
3, limb protective railing erection requirements:
(1) protective railings should be composed of upper and lower railings and handrails, and the height of the upper pole from the protective surface is
1.0? 1.2mm； The height of the lower rod from the protection surface is 0.5? 0.6 meters. The maximum spacing between railings should not exceed 2m. Protective railings shall be closed with safety net.
(2) Fixation of protective railings and handrails:
(1) When it is fixed around the foundation pit, the steel pipe can be inserted into the ground for 50? 70cm deep, the distance between the steel pipe and the pit edge should not be less than1000 mm.
(2) When the concrete floor, roof or wall is fixed, the embedded parts can be welded with steel pipes or steel bars.
(3) The overall structure of the railing and its connection with the crossbar should enable the protective railing to bear the external force in any direction of 1kn anywhere on the upper pole. When there is the possibility of crowd, vehicle collision or object collision at the railing position, the cross-sectional area of the crossbar should be increased or the railing spacing should be encrypted.
(4) The protective railing must be closed with a safety net from top to bottom. A firmly fixed skirting board with a height of not less than 18cm should be set at the bottom of the railing, and the gap between the skirting board and the bottom should not be greater than 10 mm. ..
5] The railings on both sides of the receiving platform must be covered with safety nets from top to bottom.
[6] The railing of the railing should not be damaged by the protruding cantilever end.
Once the bar around the protective railing should have a gap of not less than 40 mm with other objects ... Being when the outside of the limb, in addition to the protective railing, the exposed facade must be fully enclosed with a safety net or other reliable measures.
Verb (abbreviation of verb) safety technical measures
1. After the erection of safety net and federated eye network, it can only be used after the acceptance of the project department.
4. After the erection of safety protection facilities on the construction site, they can be used only after passing the inspection by the project manager department.
3. Set up qualified protection facilities, and do not dismantle them at will.
2. Check regularly. If unqualified parts are found, they must be rectified.
5. Wear seat belts when necessary to protect the border.
20 17 Model essay on special construction scheme for safety protection 3 I. General situation of the project
The first phase of Qingxian Longxin Electronic Equipment Co., Ltd. is located in the northwest corner of the intersection of South Ring East Road and Central Street, with a total construction area of 7,804 square meters.
Second, the purpose of preparation
In the construction of high-rise buildings, falling from high places and object strikes account for a large proportion of production accidents. The protection of aerial work in this project is mainly to prevent falling objects and falling objects in the construction stage, and the protection of the main structure in the construction stage is the most important. There are many people and vehicles around this unfinished building project. Therefore, it is necessary to strengthen the border protection of the project to avoid casualties and property losses.
This project should meet the particularity of the owner's use requirements, so the safety work during construction is very important, especially the prevention of high-altitude objects. According to the characteristics of high-rise buildings in this project, it is very necessary and urgent to take corresponding preventive measures.
Third, the basis of preparation
1, project construction drawings.
2, the building construction safety inspection standard JGJ59
3, the construction enterprise safety production evaluation standard "JGJ/T77.
4. Environmental Sanitation Standard for Construction Sites (JJ146)
5. Several Provisions on Prevention of Falling Accidents in Building Engineering, J.Z. [2003] No.82.
6. Technical Code for Safety of Working at Height in Building Construction (JGJ80-9 1)
7. Classification of Work at Height GB3608-83
8. Technical Specification for Safety Protection Facilities on Construction Site DB42/535-2009
9. The fourth edition of Building Construction Manual.
4. Security deployment
Section 65438 +0 (1) protection form
Vertical protection of steel mesh: the facade of each cantilever layer in the east, south and north of the main building is sealed with 1.5CM* 1.5CM rhombic steel mesh.
Safety protection shed protection: When the access road facing the street, the access road in the field, the access road entering and leaving the building, the ground feed inlet of the construction elevator and the working channel of the material elevator are within the falling radius of the building or within the fluctuation range, protective sheds and protective passages must be set up.
Section 2 (2) Vertical Protection of Steel Mesh
1, the steel mesh shall be rhombic steel mesh with a mesh diameter of not less than 2.5mm. 。
2. The step distance of the horizontal ledger of the cantilever outer frame is 1.8m, so the vertical width of the steel mesh is 1m, and the steel mesh can be overlapped within the same step distance, which is convenient for the installation of the steel mesh. The vertical and horizontal overlap shall be at least 150mm, and the spacing between binding points shall not be greater than 400 mm ..
3. The steel mesh is fixed on the outside of the steel pipe outside the outer frame with 14# iron wire.
4, limb steel mesh head into the floor at least 3 meters long.
5, the underlying hard isolation should be at least 200mm, and hard isolation template lap, and nailed down.
6. In the construction stage of the main structure, the sixth floor of the construction operation layer is required as the turnover height of the steel mesh, and the cantilever layer of the main operation must be closed with steel mesh.
7. After the completion of the main structure construction, in the commercial stage of Zhong Bai, within the falling radius of the corresponding building, the steel mesh with a height of 2m is vertically protected on each layer of cantilever hard isolation.
Section 3 (3) Safety Protection Shed
The erection of the safety protection shed of this project is strictly in accordance with the relevant provisions in Chapter VII of DB42, the local standard of Hubei Province, Technical Specification for Safety Protection Facilities on Construction Sites. After the installation is completed, it will be accepted by the security department and the technical department, and then submitted to the supervisor for acceptance.
1. material
A48 steel pipe, right-angle fastener, butt fastener, rotary fastener, dense mesh safety net, bamboo string piece, yellow and black paint.
Step 2 Prepare for work
Organize materials such as protective shed to enter the site in advance, and coordinate the labor force to carry out the main structure construction. The following work must be completed as soon as possible before the construction of protective shed: external wall decoration construction? Outside the frame demolition? Waterproof construction of basement roof? Square ground building.
3, site protective shed erection layout
According to Article 7. 1.5 of Technical Specification for Safety Protection Facilities on Construction Sites? For buildings with a height of more than 30m, the length of entrance and exit passages shall not be less than 5m. The protection radius of the field protective shed should be calculated from the outer edge of the outer frame. Therefore, according to the requirements of relevant codes and storeys, and considering the commercial image of Zhong Bai Supermarket, the width of the protective shed on the east side of this project is 12m (from the outer wall), which also meets the protection range of the possible falling radius of the tower crane. Both? Safety first, prevention first? It is necessary to negotiate with the owner to meet the safety protection requirements to ensure the effective protection radius-at least 5 meters from the edge of the outer frame.
4, protective shed erection requirements
(1) The clear height of this protective shed is 4.5m (which can be adjusted according to the awning at the entrance), and it is erected with 6m long steel pipes.
(2) The protective shed column is a 400*400 column composed of four steel pipes.
(3) The protective shed is set in two layers, with an upper spacing of 800 and a lower spacing of 700.
(4) At the top of the protective shed, double-layer bidirectional orthogonal bamboo scaffold boards are laid, and the protective fence and baffle are tightly closed. Which is used for the top floor of the protective shed within the falling radius of the main building? =2.5 thick steel plate for hard isolation, laying bidirectional bamboo raft at the bottom.
(5) Steel plates shall overlap 5 cm and be welded securely by electric welding. The bamboo rope net overlaps the steel plate by at least 50 cm.
(6) All steel pipes are painted with yellow paint, and the top of the protective shed is also sprayed with yellow paint.
(7) A dense mesh safety net shall be hung on the top of the protective shed, and it shall be fastened with no less than 14# iron wire.
Measures to prevent objects from hitting accidents 1. All employees attach importance to and implement their responsibilities.
The project should attach great importance to safety work, formulate a safe production responsibility system suitable for the construction project according to the actual situation, and clarify the safety responsibilities of managers at all levels and workers of all types of work, and make it clear through education and training, signing a target responsibility book and signing a construction safety contract. Really implement the safety responsibility layer by layer. 2. Strictly control technical measures.
(1) implementation? Sambo? protective measure
Safety helmet, safety belt and safety net are recognized as safety by construction workers? Sambo? To save the lives of millions of workers, it must be used correctly.
(2) execution? Five sides? protective measure
In the process of construction, double fences or safety nets with a height of 1m must be set around the balcony without railings, around the roof without external frame protection, around the floors of frame engineering, on both sides of the runway (ramp) and outside the unloading platform. It is strictly forbidden to pile up items at the edge of the floor 1 m.
(3) In strict accordance with the plan.
3, do a good job in safety education and training activities.
Improve the quality of workers' work and strengthen the education and training of safety team. Correct bad habits and prohibit throwing building materials, sundries, garbage and tools down or up; The tools used must be put into a tool bag or toolbox.
4. Hold the shelf ten times.
5. Complete the main structure project as soon as possible.
6. Put up safety warning signs on site reasonably.
7, strengthen the safety education of workers in the process of construction work, and create a good safety atmosphere.