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Precautions for waterproof board construction

RELEASE TIME :

2022-11-03 11:58

Precautions for waterproof board construction

Tunnel and underground engineering waterproof system failure refers to the use of waterproof systems and materials, due to external effects of erosion damage or weakening of internal materials, resulting in weakened or complete loss of the ability to resist the groundwater environment. It is of great significance to analyze and study the failure influencing factors and mechanisms of different underground engineering in different groundwater environmental media, as well as the influence of the materials produced by the failure materials on the surrounding structural properties. Evaluation indexes and failure detection methods of various failure influencing factors of underground engineering waterproof system are established.

防水板施工注意事项

Waterproof plate is also called geomembrane. It is customary to say that the thickness >=0.8mm geomembrane is waterproof plate, said that thickness <0.8mm geomembrane is waterproof plate. It is a kind of impervious material made of polymer as the basic raw material, divided into homogeneous waterproof board and composite waterproof board. Its main function is to prevent liquid leakage and gas volatilization.

Raw materials generally include polyethylene (LDPE), high-density polyethylene (HDPE), vinyl/vinyl acetate copolymer (EVA), polyvinyl chloride (PVC), vinyl acetate modified asphalt (ECB), etc. Waterproof board is a new type of impermeable and waterproof geotextile, mainly used in various fields of liquid isolation and other protection, but also plays a strengthening and protection role. Waterproof plate is mainly used for earthwork dam, rockfill dam, masonry dam, concrete dam, tailings dam, sewage reservoir dam, channel, liquid storage tank and other engineering seepage prevention, subway, basement, tunnel seepage prevention lining, highway, railway foundation seepage prevention, as well as the use of filament geotextile and bentonite waterproof blanket geotextile materials in household waste landfill.

Precautions for construction of waterproof plate on rock surface:

Rock surface construction is different from some conventional ground construction. Due to the particularity of the working environment, more points need to be paid attention to in the construction process. Especially waterproof plate material. Waterproof board and bentonite waterproof blanket materials in the construction process, due to some external factors, easy to damage, and then affect the quality of laying and construction quality. Therefore, before paving work, first check that the rock surface is smooth and there are no protruding sharp stones. For some prominent parts, it should be cleaned up, and difficult to clean parts can be removed and smoothed. When using the waterproof sheet material for the outer layer, ensure that the waterproof sheet is against the rock surface. Fixed waterproof board material, the anchor should be nailed in the four corners as far as possible, so that the fixed effect is better, waterproof board material also has relatively loose activity space.

In the process of construction of waterproof SLATE pavement, some slope conditions often occur because of human error. These slope lineaments should follow the principles of early inspection, early detection and early welding repair. Avoid more damage to the later laying work. After the laying of waterproof board material is basically completed, in order to complete further fixing, it is also necessary to cooperate in the production process. A professional technician is usually assigned to supervise the site work during construction. The purpose of the supervisor is to check at all times whether the waterproof plate has been pulled, fallen or damaged. Damaged areas need to be repaired in time.

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