Well sealing device

Abstract

The invention relates to the technical field of engineering construction and discloses a well sealing device. The well sealing device comprises a sleeve, a slurry injection pipe and a switch assembly.The first end of the sleeve stretches into a well pipe. The sleeve and the well pipe are sealed and fixedly connected. The slurry injection pipe is arranged in the sleeve. The first end of the slurryinjection pipe is exposed to the second end of the sleeve. The slurry injection pipe and the sleeve are sealed and fixedly connected. The switch assembly is arranged on the first end of the slurry injection pipe. According to the invention, the sleeve and the well pipe are sealed and fixedly connected, and the slurry injection pipe and the sleeve are sealed and fixedly connected, so slurry is injected into a pit bottom precipitation well from the slurry injection pipe; after the slurry injection, the switch assembly is closed, so confined water in the pit bottom precipitation well will not flow into a foundation pit and flow under the base plate from the pit bottom precipitation well to damage the base plate; and waterproof quality of the base plate can be ensured.

Description

technical field [0001] The invention relates to the technical field of engineering construction, in particular to a well sealing device. Background technique [0002] During the construction process, the condition of the groundwater system is complex and changeable, and the dewatering at well points around large foundation pits cannot fully meet the on-site dewatering requirements. Therefore, the method of dewatering at the bottom of the foundation pit must be used for foundation pit dewatering, and the water under the pit is mostly confined water. Therefore, the pressure relief and drainage of the pit bottom water and the sealing of the well have become important and difficult points. [0003] Due to the difficulty of groundwater dewatering in deep and large foundation pits, the dewatering of many tube wells around foundation pits cannot meet the construction requirements, and dewatering at the bottom of foundation pits has become an inevitable task. Many sites will use pit...

AI Technical Summary

Problems solved by technology

[0003] Due to the difficulty of groundwater dewatering in deep and large foundation pits, the dewatering of many tube wells around foundation pits cannot meet the construction requirements, and dewatering at the bottom of foundation pits has become an inevitable task. Many sites will use pit bottom tube well dewatering or light well point dewatering. Encountered problems such as well closure

If the groundwater is unpressurized water sealing well procedure is relatively easy, you can directly seal the well with concrete before pouring the bottom slab concrete, if the groundwater is pressurized water, then directly plugging and pouring concrete will form a water system, and the waterproof quality of the bottom slab cannot be guaranteed

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