Underground continuous wall construction method

By real-time monitoring and automatic adjustment of mud properties, combined with precise sediment detection and trench wall evaluation, the problems of unstable trench walls and inaccurate sediment control in the construction of diaphragm walls have been solved, improving construction efficiency and quality reliability.

CN121345113BActive Publication Date: 2026-07-21BEIJING URBAN CONSTR XINJIE RAIL TRANSIT ENG CONSULTING CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING URBAN CONSTR XINJIE RAIL TRANSIT ENG CONSULTING CO LTD
Filing Date
2025-10-11
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

In the construction of diaphragm walls, the dynamic changes in mud properties lead to instability of the trench walls and inaccurate control of sediment at the bottom of the trench, affecting construction efficiency and quality, and lacking real-time data and quantitative control.

Method used

The mud performance is monitored in real time using an online mud densitometer and a Marshall funnel viscometer. The mud density and viscosity are adjusted by automatically adding bentonite slurry and carboxymethyl cellulose solution. The thickness of the sediment is detected by combining the air lift device for hole cleaning and the measuring rope. The central processing unit is used to achieve automatic emergency reinforcement. The tank wall is evaluated and repaired in conjunction with scanning imaging equipment and a micro pressure sensor array.

Benefits of technology

It enables real-time dynamic control of mud properties, ensuring the stability of the tank wall and thorough removal of sediment, improving the accuracy and reliability of construction, and reducing uncertainties and rework probability during construction.

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Abstract

The present application relates to a kind of underground continuous wall construction method, belong to the deep foundation support construction technology field in building construction, mainly solve the technical problem that the mud performance is not stable and causes the slot wall collapse in the process of underground continuous wall grooving and the difficult control of sedimentation.The method is guided by reinforced concrete guide wall, uses hydraulic grab to excavate 6m to 8m long, 20m to 50m deep slot section, and real-time monitoring mud density and viscosity, by adding bentonite slurry so that density is maintained at 1.1g / cm 3 To 1.3g / cm 3 , add carboxymethyl cellulose solution to maintain the viscosity of marshall funnel at 40s to 50s;After hole cleaning, ensure that the sediment thickness is less than 100mm, then lower the reinforcement cage and use the duct method to pour underwater concrete.The method can effectively ensure the stability of the slot wall and the quality of concrete pouring, improve the integrity and impermeability of the wall, mainly used for deep foundation pit support, underground structure impermeability and load-bearing wall construction.
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