摘要
全风化花岗岩风化程度高,其广泛分布在我国华南、西南地区。虽然其仍具有一定的强度和稳定性,但其岩水稳定性差、水敏性强,在富水全风化花岗岩地层修建隧道时,易出现围岩大变形、突变失稳、坍塌等灾害,给隧道建设带来极大的安全隐患。因此,研究富水全风化花岗岩隧道的变形特征和控制技术至关重要。通过三轴压缩试验方法,研究了扰动土样的配置、应力-应变关系曲线特性和破坏形态分析。结果表明:不同含水率下的全风化花岗岩试样破坏形式一致,在压缩过程中均没有出现剪切带,而是产生较大的塑性变形,其最终的形态为中间大两边小的“腰鼓状”。
Fully weathered granite has a high degree of weathering and is widely distributed in south China and southwest China.Although it still has a certain strength and stability,due to poor rock water stability and strong water sensitivity,when constructing tunnels in water rich fully weathered granite formations,disasters such as large deformation,sudden instability,and collapse of the surrounding rock are prone to occur,posing great safety hazards to tunnel construction.Therefore,it is crucial to study the deformation characteristics and control technology of the water-rich weathered granite tunnel.The triaxial compression test method is used to study the configuration of disturbed soil samples,the characteristics of stress-strain curves and the analysis of failure patterns.The results show that the failure forms of the weathered granite samples under different moisture content are the same,and there is no shear zone in the compression process,but large plastic deformation occurs,and the final shape is"waist drum"with large middle and small two sides.
作者
涂久根
王传飞
罗鹏彬
TU Jiugen;WANG Chuanfei;LUO Pengbin(Project Construction Management Company,Jiangxi Communications Investment Group Co.,Ltd.,Nanchang,Jiangxi Province,330008 China;East China University of Technology,Nanchang,Jiangxi Province,330013 China)
出处
《科技资讯》
2025年第20期226-229,共4页
Science & Technology Information
关键词
软弱围岩
三轴压缩试验
应力-应变关系曲线
坍塌
风险控制
Weak surrounding rock
Triaxial compression test
Stress-strain relationship curve
Collapse
Risk control
