Project Overview
Due to the low flow rate at the outlet, it is necessary to cut through the poured concrete wall within the calibration range specified in the drawing. Part of the wall needs to be removed underwater, and a new trash rack should be installed in the designated area, while ensuring that the new outlet is properly cut. Additionally, pipeline inspection and related camera work must be completed thoroughly.
2.2 Construction Process
The construction process includes: project preparation → setting up construction enclosures and safety signs → erecting support scaffolding → marking and positioning → diamond wire cutting and water drilling → underwater installation → underwater camera inspection → cleaning the site.
2.3 Project Scope
The scope of this project includes:
- Local scaffolding setup
- Diamond wire cutting
- Water drilling
- Underwater lifting
- Underwater camera inspection
- Site cleanup
2.4 Underwater Cutting Construction Process
Based on the site survey, the working environment allows for the use of a diamond wire saw equipped with a rhinestone cutting block. The volume of the cut block is 2.5m x 2.2m x 0.3m, and the cutting line is shown in the cutting diagram.
The operation process is as follows:
2.4.1 Pre-Construction Preparation
Firstly, commission construction machinery and ensure personnel safety. Implement power supply, water source, warehouse, and staff office and accommodation conditions required for construction. Set up partial scaffolding on-site, with wooden tops and legs.
2.4.2 Safety and Warning Measures
Professional guards are assigned to the demolition area, and all protective equipment such as life jackets and helmets are fully available.
2.4.3 Scaffolding Installation
Scaffolding is erected according to the construction plan and design requirements.
2.4.4 Staking Out the Cutting Area
Based on the construction drawings, the site is staked out and confirmed by the owner and supervisor. The cutting route is marked sequentially within the actual cutting range, with each cutting unit being 2.2m to 2.5m square and a thickness of approximately 0.3m.
2.4.5 Diamond Wire Saw Installation and Operation
According to the cutting route, drill a Φ55 hole every 2-3 meters to allow the chain to pass through. Install expansion screws to secure the cutter and guide pulley. The schematic diagram of the diamond wire saw installation is as follows:
Hilti WS15 diamond wire saw cutting bridge image
Hilti WS15 diamond wire saw cutting floor image 1
Hilti WS15 diamond wire saw cutting floor image 2
The operation of the diamond wire saw is carried out by our company, and only trained operators are allowed to operate it.
2.4.6 Rhinestone Installation and Operation
Before cutting, ensure that the required water and electricity for the drilling rig are available on-site. Construction personnel must strictly follow the cutting position line. The hole positions must be accurate, with a deviation not exceeding 10mm. The overlap between holes should not exceed 15%.
Chapter III Overall Deployment and Guarantee Measures
3.1 Principles of Construction Deployment
Based on the scale and characteristics of the project, combined with the actual situation on site, the construction should be arranged reasonably. We actively respond to the owner's requirements for project quality, select experienced project managers and technicians, well-trained construction teams, and advanced construction plans to organize and manage the tender section effectively.
3.2 Duration Guarantee Measures
Given the heavy workload and short construction period, we have proposed the following measures to ensure timely completion of the tender section:
3.2.1 Organizational Guarantee
Shorten the construction preparation period and enter the site early. If the bid is won, the main management team will be in place within one day after signing the contract. Together with the site conditions, we will organize relevant personnel to construct temporary facilities and prepare technical and economic documents for the project.
3.2.2 Labor Guarantee
Make a labor usage plan based on the overall construction schedule to ensure sufficient labor and maintain normal construction progress.
3.2.3 Equipment Assurance
Ensure proper use, maintenance, and repair of equipment. Keep spare parts ready for vulnerable components to ensure the normal operation of all equipment and improve their utilization rate.
3.2.4 Technical Guarantee
Do a good job in the overall planning and network planning of the project, set stage objectives, and arrange the construction process scientifically. Analyze the time for each construction process, take special measures to minimize weak links, and shorten the cycle time of each process to improve construction progress. At the same time, focus on managing key processes to ensure both construction period and quality.
Chapter IV Construction Organization and Coordination
4.1 Organizational Setup
To complete the tender project with high quality and on schedule, we propose appointing a project manager with the qualification and rich experience. An efficient and capable construction team will be organized to fully implement project management for this project.
The construction organization is shown in Figure 3.
| Project Responsible |
| Site Construction Management |
| Technical Support |
| Construction Team Leader |
| Construction Team Leader |
| Construction Team Leader |
| Figure 3 Construction Staff Organization Chart |
In order to ensure the project's progress, construction personnel can be adjusted as needed according to actual requirements.
4.3 Construction Coordination
Develop preventive and management measures to avoid potential safety and quality issues as outlined in the design documents and during the construction process. Define the responsibilities of the construction team to ensure that the owner’s and supervisor’s instructions are effectively implemented.
Contact the owner, supervisor, and design unit promptly after winning the bid to conduct design and technical reviews before the start of construction.
Implement quality control, inspection, and management systems. All finished products, semi-finished products, equipment, and materials entering the site must be checked by the supervising engineer to ensure they meet the project’s requirements.
During construction, strictly follow the principle that the next process cannot proceed if the previous one is unqualified, enabling smooth work for the supervising engineer.
Chapter V Schedule
5.1 Basis for Preparation
The characteristics and design requirements of the project, reinforced design and construction drawings, the actual site conditions, and the equipment, material resources, and technical capabilities of our unit serve as the basis for scheduling.
5.2 Construction Schedule
The project's construction period is tentatively scheduled for 20 normal working days.
Chapter VI Engineering Assurance Measures
6.1 Duration Guarantee Measures
After signing the contract, our unit immediately organizes the main project management personnel and other relevant personnel to enter the site within one day to carry out intense and orderly work. Conduct detailed construction surveys, measurements, re-testing, and other temporary engineering planning and design, quickly bring personnel, materials, and equipment to the site, and organize production and living facilities simultaneously to begin construction as soon as possible, minimizing the preparation period.
Organize the transfer of construction machinery, equipment, and materials, and urgently bring mechanical equipment to the site to meet construction needs.
Invest in practical experience and assign young, strong cadres and construction teams with strong construction experience and combat capability to undertake the construction tasks of this tender, according to the unified deployment of the leaders.
Strengthen on-site construction and command, ensuring correct and effective command, high efficiency, and strong response capability.
Establish and improve the post responsibility system, where construction personnel are responsible for appointments, strict adherence to technical standards, clear construction discipline, and construction according to design requirements.
Carefully plan the construction organization, strengthen management, compile and implement the construction organization design, gradually assign responsibilities, implement them, and continuously optimize in practice. The key to realizing the construction organization is to strengthen management, which requires a high starting point, high quality, and strict requirements.
Focus on constructing the program and standardizing the construction. Through reasonable organization and correct construction methods, production capacity is formed as soon as possible, construction progress is improved, and the construction is completed on schedule.
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.
Focus on relying on technological progress. Use new technology and high-efficiency construction machinery for key processes to solve construction technical problems affecting progress. Organize research, listen to rationalization proposals, and carry out small reforms to improve construction progress.
Prepare material supply plans according to the production plan, advance orders, and provide sufficient stock to ensure the supply of engineering materials.
Use microcomputers to manage construction, analyze and process construction data, select decision-making mathematical models, combine relevant data and external information, make decisions using computers, and implement scientific management of construction.
Mechanical equipment should not be overloaded or used beyond its intended scope, and must be used strictly according to the conditions specified in the machine instruction manual.
In areas where machinery is parked centrally, fire-fighting equipment and anti-theft measures must be provided.
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
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 Responsibilities
1) Project Manager
Host comprehensive work to ensure full compliance with project contract requirements.
Responsible for the construction progress, safety, quality, construction period, and cost of the construction projects.
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
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.
Grasp the technical guarantee requirements of key and special processes and strengthen the control of the construction process.
Responsible for final inspection and testing, and organize the completion of the project.
3) Engineering Technology Department
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.
The organization measurement group controls the inspection equipment and the project control measurement of the project.
Guide the laboratory to control the inspection and test conditions.
Organize engineering protection and delivery work, and be responsible for the application of statistical technology.
Organize the standards and main village plans for purchasing products.
Organize the review and disposal of non-conforming products and assist the chief engineer to organize the completion of the project.
Preside over the development of corrective actions and preventive measures, and verify the effectiveness of their implementation.
4) Department of Mechanical and Electrical Materials
Responsible for material procurement and organize material inspection and testing.
Responsible for organizing the implementation, use, maintenance and management of mechanical equipment.
6.2.3 Engineering Quality Assurance Technical Measures
Carefully organize the construction, which is completed by a professional team familiar with the construction process.
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.
Technical delivery and technical training for the employed personnel, special types of work must be certified.
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.
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.
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
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
Conscientiously implement the national safety production and labor protection guidelines, policies, and regulations, as well as the state's regulations on safety production.
Strengthen the safety production education of employees, improve the safety awareness of employees, firmly establish the idea of "safety first", and adhere to the principle of "safe production and prevention as the mainstay".
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.
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.
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.
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.
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 "Regulations", "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.
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.
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.
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.
Wear life jackets and helmets for waterwork.
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.
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.
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.
The fire protection work implements the principle of “prevention first, anti-disintegrationâ€. Implement fire protection regulations, regulations and fire protection technical specifications.
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.
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.
Use electrical equipment in accordance with technical specifications and operating procedures. Install electrical equipment, perform cutting operations, etc., and operate by qualified professional technicians.
The storage and storage of construction materials meet the fire safety requirements, and the flammable and explosive materials are stored in a special library.
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.
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
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.
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.
Construction maintenance personnel should pay attention to safety when working on the road, and should not be outside the operation area.
Strictly follow the operating procedures and use the mechanical equipment safely and reasonably according to the requirements of the equipment manual.
The use of construction maintenance equipment strictly implements the principles of fixed person, fixed machine and responsibility.
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.
It is forbidden to disassemble auxiliary equipment, parts and random parts at will, and arbitrarily change the equipment organization.
Mechanical equipment must not be repaired, maintained, lubricated, reinforced, etc. under operation, and must be checked after shutdown.
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.
After the operation, the mechanical appearance should be cleaned and regularly maintained according to the mechanical maintenance regulations.
7.4 Adhere to Civilized Construction
Strict product protection measures and systems, temporary facilities and various materials, components and semi-finished products are neatly stacked.
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.
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.
Keep the construction site clean and tidy, so that the live material is cleaned.
Wuxi Jinle Automobile Motor Factory , https://www.wxjldj.com