半刚性桩复合地基的作用机理及案例分析

Case History of a Semi-Rigid Composite Ground and Its Working Mechanism

随着复合地基技术的不断发展和改进,在工程实际中以水泥土桩为代表的半刚性桩地基处理技术也越来越受到工程技术人员的广泛关注。对于半刚性桩的加固机理、受力特点,破坏形式及处理后桩间土的承载力特征值变化都成为研究的重点。主要分析研究了半刚性桩复合地基的加固机理、受力特点、破坏形式。采用工程实例论证了半刚性桩的作用机理和受力特点,并且根据工程实例的现场检测结果,推导计算出本工程采用半刚性桩进行地基处理后桩间土的地基承载力的提高比例,为同类型工程提供了宝贵的实践经验及参数参考价值。

With the continuous development and improvement of composite foundation technology,the soil improvement technology of the semi-rigid columns represented by the cement mixed soil column has drawn more and more attention by engineers and technicians in the engineering practice.The improvement mechanism,stress-strain characteristics,failure modes and bearing capacity characteristic value of the soil among columns after the treatment of the semi-rigid columns have become the focus of the study.In this paper,the reinforcement mechanisms,stress-strain characteristics and failure modes of the semi-rigid column composite ground are evaluated and analyzed.The working mechanisms and stress-strain characteristics of the semi-rigid column are demonstrated by an engineering case history.Based on the field test results,the increased ratio of foundation bearing capacity of soils among columns after the ground improvement with the semi-rigid columns is also evaluated in this project.This can provide valuable practical experiences and a reference point for similar projects in the future.