巨型牵引式滑坡灾变与稳定性分析及防治技术研究

Study on the catastrophe and stability analysis and prevention technology of giant traction landslide

受持续强降雨的影响,龙怀高速公路K112+210~+520右侧高边坡发生近200万m3的巨型滑坡.为进行滑坡处治设计,本文结合滑坡现场的工程地质条件、周边环境及工程建设活动特点,分析了该滑坡产生的机理及稳定性,提出了“卸载+预应力抗滑桩+钢花管注浆+排水”的综合处治措施,并采用有限元软件Midas-GTS建立典型断面模型分析处治方案的可行性.结果表明:处治后的坡体稳定系数满足规范要求,处治方案较为可靠.

Affected by continuous heavy rainfall,a giant landslide of nearly 2 million m3 occurred on the right side of K112+210~+520 high slopeof Longchuan-Huaiji Expressway.In order to carry out the design of landslide treatment,combined with the engineering geological conditions,surrounding environment and the characteristics of engineering construction activities of the landslide site,this paper analyzes the mechanism and stability of the landslide,puts forward the comprehensive treatment measures of"unloading+pre-stressed anti-slide pile+steelpipe grouting+drainage",and uses the finite element software Midas-GTS to establish a typical section model to analyze the feasibility of the treatment scheme.The results show that the stability coefficient of the slope after treatment meets the requirements of the specification,and the treatment scheme is more reliable.