1. Attach importance to risk assessment and strengthen source prevention and control.
The rail transit project has a tight schedule and heavy tasks. Lines 2 and 3 under construction are about to open for operation, and lines 5 and 6 are under construction, and it is planned to open for operation during the Twelfth Five-Year Plan period. The complex construction environment and changeable special geological conditions have brought great security risks. How to predict and control the safety risks in engineering construction, and do well in behavior management, construction management, risk management and emergency treatment are the keys to realize the safety production in rail transit engineering construction.
Therefore, the pre-control degree of safety risk assessment should be implemented to reduce safety risks through effective identification, risk assessment, hierarchical pre-control and expert pre-control. At the same time, it is necessary to strengthen the prevention of inevitable security risks and formulate special emergency plans to ensure that security risks are controlled.
(1) Implement a safety risk grading assessment system.
Risk classification requires all construction, construction and design units to establish a safety risk assessment system and carry out multi-level risk assessment at all stages of rail transit project planning, design and construction.
(2) Actively resolve risks and reduce construction difficulty.
For the identified security risks, take targeted measures to effectively prevent, reduce or even eliminate security risks in advance.
(3) Highlight key points and strengthen government supervision.
For unavoidable major hazard sources, strengthen supervision measures to prevent pre-control safety risks.
2. Pay attention to process control and strengthen various safety measures.
In the construction stage of rail transit project, according to the management idea of moving the gateway forward and shifting the center of gravity, the effective implementation of dynamic management, process control, supervision measures and code of conduct is strengthened through refined, informational and procedural management means, and the implementation of risk prevention is linked with performance appraisal and reward and punishment system to ensure the safe and stable production situation of rail transit project construction.
(1) Implement third-party monitoring.
On the basis of monitoring by the construction unit, the construction unit must entrust a third-party monitoring unit to monitor the project itself and the surrounding houses, roads and pipelines, check the monitoring data of the construction unit, and prevent the behavior of concealing or modifying the data. When the set warning value and control value are reached, targeted measures should be taken as soon as possible for disposal.
(2) Conduct pre-construction condition acceptance of key nodes.
Before the excavation of deep foundation pit engineering with high safety risk, the construction of shield entering and leaving tunnels, the construction of communication passages, and the construction of tunnels crossing buildings, rivers, bridges or existing subway lines, the construction unit shall organize the survey, design, construction, supervision and other units to carry out pre-construction condition acceptance, and the government departments shall focus on supervision.
(3) Dynamic management of potential safety hazards
Through on-site investigation by full-time safety personnel, inspection by project department, quarterly inspection by construction unit, inspection by construction supervision unit and supervision by competent department, multi-level and rolling investigation and rectification of potential safety hazards have been realized; File and register the discovered safety hazards, track and eliminate them, find one place, register one place, rectify one place, review one place, and manage dynamically, leaving no loopholes or dead ends.
(4) Implement information monitoring measures.
In view of the difficulty of rail transit engineering construction and the complex and changeable geological conditions, in order to improve the level of information construction, a platform system for rail transit engineering safety risk management and a video monitoring system for inter-station construction were established. It has played a positive role in finding dangerous situations in time, reporting them in time, handling them in time and controlling the further development of dangerous situations.
(5) Strictly control the geological advance.
Complex geological conditions have always been a difficult point in the safety control of rail transit engineering construction. The competent government departments clearly require that supplementary ground exploration, geophysical exploration and other means must be taken to comprehensively grasp the hydrogeological and engineering geological conditions for complex geological conditions; All participating units also attach great importance to geological exploration and control of unfavorable geological conditions, strengthen supplementary exploration and geological advance prediction in construction, and strive to minimize risks.
(6) Improve the safety quality of employees.
All construction units take active actions to carry out training and education with their own characteristics.
(7) Strengthen management personnel and improve safety management ability.
The construction units of rail transit projects shall inspect and assess the arrival and performance of construction and supervision personnel according to the contract. Those who are not in place or fail to perform their duties shall be dealt with according to the terms of breach of contract.
(8) Strengthen the integration of design, construction and management, improve the ability of safety prevention, form a cross, interactive, complementary and optimized behavior mechanism in construction drawing design, disclosure, professional integration and on-site construction, establish a comprehensive safety prevention mechanism, solve the problem of disconnection between design, construction and management, and enhance the overall coordination of design, construction and management.
(9) Reasonable division of bidding and strict market access.
In the case of tight construction period and heavy tasks, the intensive and flat management of rail transit construction will be realized by reasonably dividing the blocks and implementing large blocks or even whole-line bidding, which will play a positive role in promoting the safe production of engineering construction. First of all, the reasonable division of blocks reduces the number of blocks, at the same time reduces the engineering interface, reduces obstacles and ensures the smooth progress of construction; Secondly, improving the market access threshold by refining the conditions of bidders is conducive to the selection of excellent enterprises and the standardization and order of competition in the construction market; Thirdly, a reasonable increase in the number of blocks will make construction enterprises attach importance to the project and actively increase the investment in technical strength and equipment. In the situation that the management resources and technical resources of rail transit construction are very tight, it will be helpful to introduce outstanding talents to strengthen the management of project quality and safety and improve the management level.
3. Pay attention to emergency management and strengthen the handling of dangerous situations.
The complexity, diversity and uncertainty of the surface building (structure) environment, underground pipeline environment, engineering geology and hydrogeology environment faced by rail transit construction increase the construction difficulty and safety risk, and accidents and dangers are inevitable. In order to control the development of dangerous situations to the maximum extent, reduce losses and ensure the safety of life and property of the public, government departments and rail transit project contractors actively strengthen emergency management.
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