Wharf foundation pit water stopping, reducing, draining and intercepting integrated system

By integrating the water-stop curtain, dewatering well, and drainage structure into an integrated foundation pit system, the problems of water stoppage, dewatering, drainage, and interception under complex hydrogeological conditions in wharf foundation pit construction were solved, achieving stable drying of the foundation pit and safe construction.

CN122304382APending Publication Date: 2026-06-30CHINA RAILWAY GUANGZHOU ENG GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA RAILWAY GUANGZHOU ENG GRP CO LTD
Filing Date
2026-04-08
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

The construction of the wharf foundation pit faces complex hydrogeological conditions, especially the shallow groundwater level and high permeability. It is affected by dynamic hydraulic conditions such as tidal rise and fall, flood impact and wave climbing. In addition, the foundation pit is deep, large in area, and close to hydraulic structures, and the requirements for water control such as stopping, lowering, draining and intercepting are strict.

Method used

An integrated system consisting of a water-stop curtain, dewatering wells, drainage structures, and interception structures is adopted. The water-stop curtain blocks groundwater seepage, the dewatering wells actively drain groundwater, the drainage structure quickly discharges accumulated water, and the interception structure intercepts surface runoff, forming a three-dimensional prevention and control system.

Benefits of technology

This achieved the blocking of hydraulic connections between the inside and outside of the foundation pit and multi-level dewatering, ensuring the bottom of the pit is dry, enhancing foundation stability, reducing operation and maintenance costs, and improving construction safety and efficiency.

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Abstract

This application relates to the technical field of foundation pits, and in particular to an integrated system for stopping, lowering, draining, and intercepting water in a wharf foundation pit. The system includes a foundation pit body, a water-stopping curtain, dewatering wells, a drainage structure, and an intercepting structure. The water-stopping curtain is installed along the edge of the top of the foundation pit body to block or extend the hydraulic channel between the interior and exterior groundwater. The dewatering wells are located inside the opening at the top of the foundation pit body to allow groundwater to infiltrate and to extract the infiltrated groundwater. The drainage structure is installed around the bottom of the foundation pit body to drain accumulated water from within the foundation pit body. The intercepting structure is located outside the top opening of the foundation pit body to block external water inflow. The technical solution provided in this application integrates four functional modules—water stopping, dewatering, drainage, and intercepting—to form a three-dimensional, full-cycle foundation pit water hazard prevention and control system.
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