Ø Due to the low flow rate of the outlet, it is necessary to cut the concrete wall that has been poured within the calibration range of the drawing, partially remove it under water, and install the new trash rack in the specified range under the premise of cutting the new outlet. . And do a good job in pipeline inspection and related camera work.
2.2 Construction process
Ø Construction preparation → construction enclosure and safety sign setting → support scaffolding erection → scribing positioning → rhinestone drilling and wire saw cutting → underwater installation → underwater inspection camera → cleaning the site,
2.3 Project scale
The number of projects in this project includes:
Ø Local scaffolding;
Ø Diamond wire saw cutting;
Ø Drilling holes in water drills;
Ø Underwater lifting;
Ø Underwater camera;
Ø Clean up on site.
2.4 Underwater cutting construction process
Ø According to the site survey, the working environment can be carried out by means of a diamond wire saw with a rhinestone cutting block. The volume of the cut block is: 2.5M x 2.2M x 0.3M. The cut position line is shown in the cutting diagram.
The operation process of this program is as follows:
2.4.1 Preparation before entering the construction site
Ø Firstly carry out the commissioning of construction machinery and the safety of personnel admission, and implement the power supply, water source and warehouse and staff office and accommodation conditions required for construction. Partial scaffolding is set up on the site, and the top of the pipe and the legs are made of wood.
2.4.2 Safety / Danger / Work Area Warning and Maintenance
Ø Professional guardianship in the demolition area, protective equipment such as life jackets and helmets are all in place.
Ø 2.4.3 Scaffolding installation
2.4.4 Cutting range stakeout
Ø According to the construction drawings, the site is staked out and confirmed by the owner and the supervisor. The cutting route plan is:
For the outlet wall panel, the cutting unit is 2.2m~2.5m square, and the thickness is about 0.3m. According to the above principle, the cutting route is sequentially marked within the actual cutting range.
2.4.5 Wire saw installation and operation
Ø According to the cutting route, drill a Φ55 through hole every 2-3m to facilitate the chain to pass through. Install the expansion screw in place to secure the cutter and guide pulley. The schematic diagram of the installation of the diamond wire saw is as follows:
The diamond wire saw uses the Hilti WS15, the operation of the cutting tool, and follows the operating instructions.
Hilti WS15 diamond wire saw cutting bridge picture
Hilti WS15 diamond wire saw cutting floor picture 1
Hilti WS15 diamond wire saw cutting floor picture 2
Ø The operation of the diamond wire saw is carried out by our company, and non-operators are not allowed to operate.
2.4.6 Rhinestone installation and operation
Ø Before the cutting, the water and electricity required by the drilling rig will be equipped to the site. The construction personnel are required to cut strictly according to the cutting position line. The hole position is required to be accurate, and the position deviation should not exceed 10mm. The lap factor between the hole and the hole does not exceed 15%.
Chapter III Overall Deployment and Guarantee Measures
3.1 Principles of construction deployment
Ø According to the scale and characteristics of the project, combined with the actual situation on the site, the construction should be arranged reasonably.
Actively respond to the owners' requirements for project quality, select experienced project managers and technicians, well-trained construction teams, well-equipped mechanical equipment, and adopt advanced construction plans to reasonably organize and arrange the construction of this tender section.
Ø Respond positively to the owner's requirements regarding the contract period, and take various effective measures to protect.
3.2 Duration guarantee measures
Ø Due to the heavy engineering tasks and short construction period of this tender section, in order to ensure that the bidding section project is completed on time and according to the quantity, and the characteristics of this bidding section project are also proposed, the following construction period guarantee measures are proposed:
3.2.1 Organizational guarantee
Ø Shorten the construction preparation period and enter the site construction early. If the unit wins the bid, within 1 day after the contract is signed, the main management personnel of the project will be in place, and together with the site conditions, we will go all out to organize the relevant personnel to construct temporary facilities, arrange construction preparation and prepare technical and economic documents for the construction of the project.
Ø Do a good job of standardized construction, improve construction progress through reasonable construction organization and correct construction methods.
Ø Strengthen management, improve the internal economic contract responsibility system, and use economic levers to fully mobilize the enthusiasm and consciousness of the employees, as the organization and ideological guarantee during the period of guarantee.
3.2.2 Labor guarantee
Ø According to the overall construction schedule, make a labor use plan to ensure sufficient labor and ensure the normal construction of the project.
3.2.3 Equipment Assurance
Ø Do a good job in the use, maintenance and repair of the equipment, and often use vulnerable parts to ensure
Ø The normal operation of various equipments to improve their utilization.
3.2.4 Technical guarantee
Ø Do a good job in the overall planning and network planning of the project, set the stage objectives, and arrange the construction process scientifically and reasonably. By analyzing the time of each construction process, special measures are taken to minimize the weak links affecting the progress, and the cycle time of each construction process can be shortened scientifically and reasonably to improve the construction progress. At the same time, firmly grasp the management and construction of key processes to ensure the construction period and quality of key process construction.
Ø According to the requirements of the overall construction schedule, prepare monthly and ten-day construction production plans, establish a production analysis conference system, check and check, find gaps, find reasons, improve management, and promote construction.
Ø Organize technical and quality management personnel to learn the bidding documents, technical specifications and construction supervision procedures, and accurately grasp the standards and procedures required by the project.
Ø Strengthen technical management and process management to prevent rework due to work errors and affect normal construction progress.
Chapter IV Construction Organization and Construction Coordination
4.1 Organizational settings
Ø In order to complete the bidding project with high quality and on schedule, it is proposed to be a project manager with the qualification of project manager and rich construction experience. At the same time, organize an efficient and capable construction team to fully implement project management for this project.
Ø The construction organization is shown in Figure 3.
In order to ensure the progress of the project, the construction personnel can adjust at any time according to actual requirements.
Table 5 Construction equipment and tools table
4.3 Construction coordination
Ø Develop preventive measures and management measures to prevent possible safety and quality problems according to the requirements of the design documents and various problems in the construction work that may occur during the construction process. Defining the responsibility of construction to ensure that the instructions or coordination of the owner and the supervision engineer are effectively implemented.
Ø After winning the bid, contact the owner, supervisor and design unit in time to carry out the design technology before the start of construction.
Ø Implement quality control, inspection and management systems. All finished products, semi-finished products, equipment and materials entering the site shall be checked with the supervision engineer to check whether the qualifications and reputation of the production unit meet the requirements of the project.
Ø During the construction, strictly follow the guidelines that the previous process is unqualified and the next process is not constructed, so that the supervision engineer can carry out the work smoothly.
Chapter V Schedule
5.1 Basis for preparation
Ø Characteristics and design requirements of this project.
Ø Reinforce the design and construction drawings and related technical specifications.
Ø The actual situation at the construction site.
Ø The equipment, material resources and economic and technical strength of my unit.
5.2 Construction schedule
Ø The construction period of the project is tentatively set at 20 normal working days.
Chapter VI Engineering Assurance Measures
6.1 Duration guarantee measures
Ø After the contract is signed, our unit immediately organizes the main management personnel of the project and other relevant personnel to enter the scene within one day to carry out intense and orderly work. Carry out detailed construction survey, measurement, re-testing and other temporary engineering planning and design, personnel, materials, equipment and equipment quickly entered the market. Organize production and living facilities to go hand in hand, arrange construction as soon as possible, and minimize the construction preparation period.
Ø Organize the transfer of construction machinery, equipment and materials, and urgently use mechanical equipment to enter the construction site as soon as possible to meet the construction needs.
Ø Investing and enriching the practical experience, with the young and powerful cadres and the construction team with strong construction experience and strong combat capability, according to the unified deployment of the leaders, equipped with adequate and reasonable construction workers and mechanical equipment to undertake the construction tasks of this tender.
Ø Strengthen the on-site construction and organization command, so that the command is correct, the command is effective, the efficiency is high, and the ability to respond is strong.
Ø Establish and improve the post responsibility system, the construction personnel shall be responsible for the appointment, strict technical standards, technological measures, clear construction discipline, and construction according to design requirements.
Ø Carefully arrange construction organization, strengthen management, compile and implement construction organization design, gradual responsibility, implementation, and continuous optimization in practice. The key to the realization of construction organization is to strengthen management, and it must have a high starting point, high quality and strict requirements.
Ø Grasp the construction of the program and standardization of construction. Through reasonable organization and correct construction methods, the production capacity will be formed as soon as possible, the construction progress will be improved, and the construction will be completed on schedule.
Ø Do a good job in the overall planning of the project, scientific organization, reasonable arrangement, and balanced production. Firmly grasp the management and construction of key processes, control cycle time, reduce process overlap time, and improve construction efficiency.
Ø Focus on relying on scientific and technological progress. With new technology, the key processes use machinery with high construction efficiency. To solve the construction technical problems affecting the construction progress, organize research, fully listen to the rationalization proposals in various aspects and carry out small reform activities to improve the construction progress.
Ø According to the production plan, the material supply plan will be prepared, and the order will be advanced, and sufficient stock will be provided to ensure the supply of engineering materials.
Ø In the construction, use microcomputer to manage, use microcomputer to analyze and process construction data, select decision mathematical model, combine relevant data and external information, make decisions with computer to implement scientific management of construction.
Ø Mechanical equipment should not be overloaded during use, or expand the scope of use arbitrarily, and should be used strictly in accordance with the conditions specified in the mechanical instruction manual.
Ø In places where machinery is parked centrally, fire-fighting equipment and anti-theft measures must be provided.
Ø Important machinery should have spare parts for the whole machine or part of the assembly to ensure the normal operation of the machine.
6.2 Project Quality Assurance Measures
6.2.1 Quality assurance system operating mechanism
Ø In order to implement the “100-year plan, quality-oriented†policy and ensure the quality of the project, a complete quality assurance system must be established. The organization of the quality assurance system of this project is shown in the following figure.
6.2.2 Quality Duties
1) Project Manager
Ø Host a comprehensive work to ensure full compliance with project contract requirements.
Ø Responsible for the construction progress, safety, quality, construction period and cost, and civilized construction of the construction projects.
Ø Responsible for the effective operation of the quality system in the project department and internal and external coordination in the quality system operation process, and improve its operating environment to ensure the quality of the project.
2) Technical Deputy Manager
Ø Responsible for the construction technology work of the project department, presided over the preparation of the construction organization design and quality plan, clarify its technical guarantee and quality assurance requirements, and strengthen the control of the construction process.
Ø Grasp the technical guarantee requirements of key and special processes and strengthen the control of the construction process.
Ø Responsible for final inspection and testing, and organize the completion of the project.
3) Engineering Technology Department
Ø Organize the construction organization design and quality plan, be responsible for process control, carry out construction technical foundation for major technical difficulties, key and special processes, and be responsible for the guidance and review of the construction plan.
Ø The organization measurement group controls the inspection equipment and the project control measurement of the project.
Ø Guide the laboratory to control the inspection and test conditions.
Ø Organize engineering protection and delivery work, and be responsible for the application of statistical technology.
Ø Organize the standards and main village plans for purchasing products.
Ø Organize the review and disposal of non-conforming products and assist the chief engineer to organize the completion of the project.
Ø Preside over the development of corrective actions and preventive measures, and verify the effectiveness of their implementation.
4) Department of Mechanical and Electrical Materials
Ø Responsible for material procurement and organize material inspection and testing.
Ø Responsible for organizing the implementation, use, maintenance and management of mechanical equipment.
6.2.3 Engineering Quality Assurance Technical Measures
Ø Carefully organize the construction, which is completed by a professional team familiar with the construction process.
Ø With the project manager as the head, implement the division of responsibility system for the project quality and implement it in a practical manner, so that all staff fully realize the importance of ensuring the quality of the project.
Ø Technical delivery and technical training for the employed personnel, special types of work must be certified.
Ø At the same time as the main materials enter the site, it is required to have the relevant certificates, inspection reports and other relevant certificates, and send them to the construction unit and the supervision unit for verification, and then confirm the qualified before they can be used.
Ø Strengthen construction quality inspection and acceptance work. Execute the project quality inspection system, do a good job in the hidden inspection and pre-inspection of each sub-project, and timely report the results of the project quality inspection to the construction unit and the supervision unit, and confirm it by on-site inspection. After issuing the engineering inspection approval letter Only the next process can be carried out. The opinions of the construction unit and the supervision unit should be taken seriously and rectified in time.
Ø Give full play to the role of quality inspectors. The quality inspectors carefully supervised and inspected the materials entering the site, and found that the unqualified items were reported in time and stopped. Track and inspect the whole process of construction technology to stop illegal operations. Responsible for pre-inspection and conceal inspection of each operation process, responsible for quality inspection and engineering acceptance of construction process.
Chapter VII Safe Production and Civilized Construction
7.1 Safety objectives and safety commitments
Ø To achieve no engineering accidents and major equipment and personal injury accidents, it is determined to achieve "five eliminations", that is, to prevent construction deaths; to prevent multiple casualties; to eliminate major mechanical accidents; to eliminate major traffic accidents; to prevent major fire accidents.
7.2 Security Assurance Measures
Ø Conscientiously implement the national safety production and labor protection guidelines, policies and regulations, as well as the state's regulations on safety production.
Ø Strengthen the safety production education of employees, improve the safety awareness of employees, firmly establish the idea of ​​“safety firstâ€, and adhere to the principle of “safe production and prevention as the mainstayâ€.
Ø Establish and improve a safety production assurance system, establish and implement a safety production responsibility system, clarify the responsibilities of personnel at all levels, and do a good job in the safety production of this project.
Ø Establish a comprehensive management office. The daily office is located at the construction site and is responsible for explosion protection, fire prevention, flood prevention, anti-theft, and engineering security.
Ø The project department sets up a full-time safety officer with full responsibility at the site to inspect the construction safety on the site. As long as someone is working, there must be a safety officer on site to detect potential safety hazards at any time and correct and improve at any time.
Ø Implement a safety production and certification system. For those who are engaged in special types of work, that is, electricians, welders, etc., they are required to have an operation permit to work.
Ø Before the implementation of the project, conduct safety production education for all employees involved in the construction of the project, and organize employees to study the “Regulationsâ€, “Regulations†and “Safe Production Practices†issued by the State Council, the provincial and other departments, etc. And work must be strictly observed in the construction.
Ø Before the implementation of the project, comprehensive safety inspections shall be carried out on the mechanical equipment and construction facilities invested in the project. Equipment and facilities that have not been inspected and accepted by the relevant departments are not allowed to be used. If the safety regulations are not met, they must be rectified and improved immediately.
Ø When the project is implemented, the construction shall be carried out in strict accordance with the requirements of the implementation of the construction organization design and safety production measures approved by the relevant units. Operators must strictly abide by their duties, perform their duties, and abide by safe production practices.
Ø When the project is implemented, it regularly organizes inspections of safety activities, checks the implementation of safety production measures, studies the safety hazards existing in the construction, and timely supplements and improves safety measures.
Ø Wear life jackets and helmets for waterwork.
Ø The scaffolding is erected firmly, and the probe board is not allowed on the springboard. When transporting tools, materials, etc. on the springboard, it must be transported with brown rope and must not be thrown up and down.
Ø Regularly maintain the construction equipment to ensure that the safety device is sensitive and reliable, and the protective cover is intact; at the same time, the safe power management is ensured to ensure that the power distribution and distribution meets the requirements of “four defensesâ€; the selection of transmission lines, distribution boxes and leakage switches should be consistent with Regulatory requirements. Electrical equipment and lighting have good grounding, zero-connection protection, and lightning protection facilities in locations that may be subject to lightning strikes.
Ø Set up temporary facilities such as material storage in strict accordance with the relevant provisions of fire prevention and explosion protection; the temporary facilities area is equipped with fire-fighting equipment.
Ø The fire protection work implements the principle of “prevention first, anti-disintegrationâ€. Implement fire protection regulations, regulations and fire protection technical specifications.
Ø The construction site implements a step-by-step fire safety responsibility system, organizes fire brigades on site, and establishes a duty, reporting, learning, and training system. Establish an assessment, reward and punishment system for implementing the safety responsibility system, and reward and punish.
Ø Carry out regular fire and explosion safety inspections, timely stop and correct illegal and illegal behaviors, and prevent and eliminate hidden dangers. For fire hazards that are difficult to eliminate, emergency measures must be taken to ensure safety.
Ø Use electrical equipment in accordance with technical specifications and operating procedures. Install electrical equipment, perform cutting operations, etc., and operate by qualified professional technicians.
Ø The storage and storage of construction materials meet the fire safety requirements, and the flammable and explosive materials are stored in a special library.
Ø Participants such as staff quarters and material warehouses should be assigned to special personnel for management and preventive measures should be taken to prevent theft.
Ø All kinds of cases and disasters occurred at the construction site should be reported to the public security organs immediately, and the site should be protected and the public security organs should cooperate with the public security organs.
7.3 Safety procedures for construction personnel
Ø Do not place flammable or explosive materials in the work area. Smoking and use of open flames are strictly prohibited in places where fireworks are prohibited.
Ø Construction maintenance personnel must wear work clothes or logo clothing on the road, reflective work clothes at night, and dress code must comply with the relevant provisions of labor protection.
Ø Construction maintenance personnel should pay attention to safety when working on the road, and should not be outside the operation area.
Ø Strictly follow the operating procedures and use the mechanical equipment safely and reasonably according to the requirements of the equipment manual.
Ø The use of construction maintenance equipment strictly implements the principles of fixed person, fixed machine and responsibility.
Ø It is strictly forbidden to put inflammable and explosive materials in the parking place and operation place of construction maintenance equipment. Fireproof, anti-theft, anti-corrosion and other measures are required. The equipment for multi-shift operation should be handled by a special person. There is a detailed record of handover, and equipment overload is strictly prohibited. With the operation of the disease, the abnormal situation was found to be promptly excluded or repaired. It is strictly forbidden to use in the absence of lubricating oil, hydraulic oil, coolant, etc. It is forbidden to use lubricating oil, hydraulic oil, coolant, etc. that do not meet the requirements of this machine.
Ø It is forbidden to disassemble auxiliary equipment, parts and random parts at will, and arbitrarily change the equipment organization.
Ø Mechanical equipment must not be repaired, maintained, lubricated, reinforced, etc. under operation, and must be checked after shutdown.
Ø The mechanical operation table in the construction and maintenance operation area should have sufficient lighting facilities, and the lamps should be complete and effective to meet the needs of night work.
Ø After the operation, the mechanical appearance should be cleaned and regularly maintained according to the mechanical maintenance regulations.
7.4 Adhere to civilized construction
Ø Strict product protection measures and systems, temporary facilities and various materials, components and semi-finished products are neatly stacked.
Ø The construction site is smooth, the roads are smooth, the drainage facilities are proper, the water and electricity lines are neat, the equipment is in good condition, the use is reasonable, and the construction work meets the fire and safety requirements.
Ø On-site mechanical equipment, stored at fixed points, in compliance with mechanical safety regulations, often keep the fuselage and surrounding environment clean, mechanical identification, numbering is obvious, safety device is reliable.
Ø Keep the construction site clean and tidy, so that the live material is cleaned.
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