土工基础

土工基础 ›› 2025, Vol. 39 ›› Issue (3): 443-449.

• 专题论述 • 上一篇    下一篇

基坑工程中深厚软粘土土层参数与被动加固区关系研究

徐书平1，汪紫璇1，柯芊芊1，危正平2，钟 明3，胡 磊4   

  1. （1.武汉轻工大学 土木工程与建筑学院，武汉 430023；2.武汉正洪岩土工程有限公司，武汉 430000；3.武汉地质勘察基础工程有限公司，武汉 430050；4.武汉安振岩土工程有限公司，武汉 430080)
  • 收稿日期:2023-06-11 修回日期:2023-10-09 出版日期:2025-06-30 发布日期:2025-08-05
  • 作者简介:徐书平（1965-），男，教授，高级工程师，研究方向为岩土工程。
  • 基金资助:
    武汉市城建局科技计划项目（202147）

Relationship Between Soil Parameters of Deep Soft Clay and Passive Reinforcement Zone in a Deep Excavation Project

XU Shuping1, WANG Zixuan1, KE Qianqian1, WEI Zhengping2, ZHONG Ming3， HU Lei4   

  1. (1.School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023；
    2.Wuhan Zhenghong Geotechnical Engineering Co. Ltd., Wuhan 430000；
    3.Wuhan Geological Survey Foundation Engineering Co. Ltd., Wuhan 430050；
    4.Wuhan Anzhen Geotechnical Engineering Co. Ltd., Wuhan, 430080)
  • Received:2023-06-11 Revised:2023-10-09 Online:2025-06-30 Published:2025-08-05

摘要： 在软土基坑场地，由于软土具有含水量丰富、强度低等工程特性，在基坑工程中常导致基坑变形过大进而造成安全事故，因此基坑强度控制的设计理念已经转变为对基坑变形控制的理念。为了减小软土基坑的变形，《湖北省基坑工程技术规程》(DB42/T159-2012)定性地规定了采用水泥土搅拌桩对被动区按阶梯模式加固这一方式，但对于加固宽度、深度未给出具体的理论依据。基于此，依据软土的强度参数大小，按极限平衡法确定基坑加固体宽度，并进行数值模拟，分析加固区变形特点与变形规律，得出了土层强度参数与加固体宽度的相对关系，并结合实际工程监测数据与数值模拟结果进行对比，验证了所采取的加固方法的可行性。

关键词: 被动区加固, 抗隆起, 抗剪强度参数, 数值模拟

Abstract: In deep excavation sites, due to the engineering characteristics of the high water content and the low strength of soft soils, the excessive deformation of the deep excavation often leads to safety hazards. Therefore, the design concept of the deep excavation strength control has been transformed into a concept of the deformation control of the excavated area. To reduce the deformation of the deep excavation in soft soils, the Hubei Provincial Technical Specifications for Foundation Excavation Engineering (DB42/T159-2012) qualitatively stipulates the use of cement-soil mixing columns to improve the passive zone in a stepped pattern, but no specific theoretical basis is provided for the width and depth of the reinforcement. Based on the strength parameters of soft soils, the width of the excavated area with the added solid is determined using the limit equilibrium method, and the numerical simulation is conducted to analyze the deformation characteristics of the reinforcement area. The relative relationship between the soil layer strength parameters and the width of added solid is obtained, and the feasibility of the adopted reinforcement method is verified by comparing the actual engineering monitoring data with numerical simulation results.

Key words: Passive Reinforcement Zone, Resistance to Heave, Shear Strength Parameters, Numerical Simulation

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