A deep foundation pit underground continuous wall pipe gushing repairing device and method

By using the main drill bit and anchor drill bit to drill and grout holes in the underground continuous wall, the low reliability problem of the water-blocking steel plate sealing method was solved, and a high-quality and durable seepage repair effect was achieved without affecting the appearance of the wall.

CN117431946BActive Publication Date: 2025-10-10NANCHANG RAIL TRANSIT GRP LTD CORP +2
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Patent Information

Application Number
CN202311678434.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-12-08
Publication Date
2025-10-10
Estimated Expiration
2043-12-08

AI Technical Summary

Technical Problem

In the existing technology, underground continuous wall pipe burst repair uses water-blocking steel plates to block the water, which has low reliability, is prone to failure after a long time, and affects the flatness of the wall.

Method used

A deep foundation pit underground continuous wall pipe burst repair device is used, which includes a shell assembly, a drill bit assembly and a drive assembly. A main drill bit and multiple self-propelled anchor drill bits are used to drill holes in the wall and then inject cement slurry to form a sealing slurry. The main drill shaft and anchor drill shaft remain in the slurry as a bearing structure.

Benefits of technology

The repair quality is good, the durability is high, it is not easy to recur, and it does not affect the smoothness of the wall appearance, providing reliable seepage protection.

✦ Generated by Eureka AI based on patent content.
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Abstract

The application provides a deep foundation pit underground continuous wall pipe gushing repairing device and method, and belongs to the field of foundation pit construction. In the related art, a water-stopping steel plate is generally arranged on the wall and is poured with the wall body to form a whole, so that seepage repair is realized. However, with the accumulation of time, the risk of failure and recurrence is high. The device comprises a shell assembly, a drill bit assembly and a driving assembly. The drill bit assembly comprises a main drill bit and a self-advancing anchor drill bit. The driving assembly comprises a driving ring, a main drill shaft and an anchor drill shaft. The anchor drill shaft comprises a flexible shaft section and a guide section. The device is installed at a pre-drilled hole at a seepage position of the wall body. When the driving assembly works, the main drill bit is driven to continue drilling along the hole, and the multiple anchor drill bits are laterally drilled into the soil layer behind the wall. Then, cement slurry is injected to diffuse along the path of the drill bit, form a plugging slurry body, and the drill shaft remains in the slurry body as a bearing structure. In summary, the quality of the repair by using the device and the method is reliable, the durability is high, and the recurrence is not easy.
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