1. Preparation for concrete pool construction
(1) Sign a construction safety agreement with the owner and organize employees to carry out HSE education before the site. Personnel who are required to work with certificates shall be trained and qualified before taking up their posts with certificates.
(2) on the basis of hazard identification and risk analysis, formulate hazard reduction and control measures and emergency treatment measures, and organize disclosure according to the HSE Disclosure Management Regulations of the Project Department, so that employees can master the skills and consciousness of hazard control and emergency treatment.
(3) confirm the ability and physical condition of the construction workers to engage in special operations, and carry out and implement according to the Management Regulations on Occupational Health Examination and Management Regulations on Occupational Disease Prevention and Control of the Project Department.
(4) Equipped with construction equipment and facilities that meet the requirements of safety and environmental protection. Project manager: person in charge of HSE: person in charge of security: person in charge of civil construction HSE: construction team
(5) Set up temporary facilities for construction and living such as on-site offices, lounges and warehouses, as well as fixed parking places for construction vehicles, which must meet the management requirements of HSE.
(6) The life logistics facilities such as canteen and drinking water shall meet the requirements of the Management Regulations on Cooking, Drinking and Sanitary Facilities of the Project Department.
(7) Configure necessary fire-fighting facilities and equipment and set up various safety signs and placards in accordance with the Regulations on Fire Safety Management and the Regulations on HSE Identification Management of the Project Department.
(8) provide the necessary places, facilities, equipment, vehicles and personnel for on-site rescue according to the requirements of the owner.
2. The construction scheme of cast-in-place reinforced concrete pool includes the following four aspects:
1. Foundation reinforcement
In order to reduce foundation settlement and improve foundation bearing capacity, the foundation reinforcement treatment adopts replacement filling method, that is, sand cushion method. So as to ensure that the structural settlement is flexible and uniform.
2. Optimize the concrete mixture ratio
① In order to prevent the concrete itself from leaking, impermeable concrete is adopted, with the impermeability grade S6.
② Because mass cast-in-place reinforced concrete is prone to shrinkage cracks, in order to improve the anti-cracking performance of concrete, a proper amount of HEA high-efficiency waterproofing agent is mixed into impermeable concrete
and the vertical expansion joint spacing is set, and the expansion joint spacing of sedimentation tank is about 45 meters.
3. Internal and external waterproofing agents
① The water facing surface of the pool wall is coated with JK25 water-based high-efficiency silicone waterproofing agent.
② Paint cyanation on the outside of the pool wall
③ Do you need to do basic treatment before waterproofing agent construction? Ensure that there are no pores and other attachments on the concrete surface? Then paint a waterproof agent on the clean
surface.
4. Other measures
① Treatment of through-wall bolts
② Strictly control the slump of concrete at about 12+1mm?
(3) Strengthen the contact with the design, and change the reinforcement method of casing and other places to prevent the reinforcement from being too dense and affecting the vibrating compactness of concrete.
(4) strengthen the monitoring in the construction process, and provide sufficient construction tools and inspectors.
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