Seepage deformation control method for foundation adjacent to existing high-rise building in canal foundation pit excavation process

By combining the steel plate buried depth, foundation pit precipitation depth and seepage deformation control index (SCI) for data processing, the combination of steel plate buried depth and foundation pit precipitation depth is optimized and the combination of steel plate buried depth and foundation pit precipitation is set up around the foundation pit for water separation treatment, which solves the problems of the foundation pit not meeting the standards and the unreasonable steel plate buried depth during the excavation of canal foundation pit, and effectively control seepage deformation and reduce construction costs.

CN119711537APending Publication Date: 2025-03-28广西平陆运河建设有限公司
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Patent Information

Application Number
CN202411840369.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-13
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

During the excavation of canal foundation pits, it is difficult for the existing technology to effectively control the foundation pit precipitation and steel plate burial depth, resulting in the foundation pit precipitation not meeting the standards or the steel plate burial depth is unreasonable, which increases construction costs and affects the foundation stability of surrounding buildings.

Method used

By combining the steel plate buried depth, foundation pit precipitation depth and seepage deformation control index (SCI) for data processing, the combination of steel plate buried depth and foundation pit precipitation depth is optimized, steel sheet piles are set up around the foundation pit for water isolation treatment, and anti-absorbent silicone particles are filled between the steel sheet piles and the inner wall of the foundation pit to enhance the water isolation ability.

Benefits of technology

A comprehensive analysis and control of the seepage deformation of canal foundation pits has been achieved, which reduces the deformation risk caused by seepage, ensures the smooth progress of the project, and reduces construction costs and construction volume.

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Abstract

The invention discloses a seepage deformation control method for a foundation adjacent to an existing high-rise building in the excavation process of a canal foundation pit, and relates to the technical field of foundation pit construction. The seepage deformation control method for the foundation adjacent to the existing high-rise building in the excavation process of the canal foundation pit comprises the following steps that a, a temporary cofferdam is arranged on the side, close to a river channel, in the foundation pit; b, a pumping well is arranged to lower the water level in the foundation pit; c, calculating deformation caused by seepage; d, calculating a seepage deformation control index SCI; e, the SCI value is analyzed, and whether additional measures are taken to strengthen seepage control or not is determined according to the SCI value; and f, the design is optimized, the combination of the steel plate burial depth and the foundation pit dewatering depth is adjusted, and steel plate piles are arranged around the foundation pit for water insulation treatment. According to the method, the steel plate burial depth, foundation pit dewatering and the seepage deformation control index SCI are combined, comprehensive analysis and control over seepage deformation of the canal foundation pit can be achieved, a more scientific basis is provided for engineering design, and safety and stability of the foundation pit in the construction process can be guaranteed.
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