摘要
滑坡是我国最常见的地质灾害之一。老滑坡体加上断层破碎带的影响往往导致工程滑坡成因机理更为复杂。针对广东大潮高速公路K20工点滑坡案例的破坏情况,通过现场调研和地质勘测确定该滑坡工程的变形特征,探讨了受老滑坡及断层带控制的滑坡致灾机理,并且对该处滑坡进行了稳定性分析。结果表明:该处为老滑坡地貌,地质构造是形成老滑坡的控制因素,公路路堑边坡开挖引起的坡体应力状态改变诱发了老滑坡的复活,降雨集中将加剧复活滑坡的灾害风险。针对上述分析结果,在该处滑坡原设计的基础上,提出了抗滑桩支档、锚索锚杆格梁和综合排水等综合性整治措施。
Landslide is one of the most common geological disasters in China.The influence of old landslide and fault fracture zone often leads to the more complicated mechanism of engineering landslide.According to the landslide case of K20 construction site in Dapu-Chaozhou expressway,the deformation characteristics of the landslide project are determined through field investigation and geological survey.The mechanism of landslide disaster controlled by the old landslide and fault zone is discussed,and the stability of the landslide is analyzed.The results show that the landform is old landslide,the geological structure is the control factor of forming old landslide,the change of stress state of slope caused by the excavation of road cutting slope induces the revival of old landslide,and the concentration of rainfall will aggravate the disaster risk of revival landslide.According to the above analysis results,on the basis of the original design of the landslide,the comprehensive treatment measures such as anti slide pile support+anchor bolt grid beam+comprehensive drainage are put forward.
作者
马定乐
万琪
晏长根
潘春为
华勇
MA Ding-le;WAN Qi;YAN Chang-gen;PAN Chun-wei;HUA Yong(Guangdong Transportation Industrial Investment Co.,Ltd.,Guangdong Guangzhou 510000,China;School of highway,Chang'an University,Shanxi Xi'an 710064,China)
出处
《防灾减灾学报》
2021年第2期18-24,共7页
Journal of Disaster Prevention And Reduction
基金
国家自然科学基金(41927806)。
关键词
老滑坡
断层带
稳定性分析
致灾机理
整治措施
old landslide
fault zone
stability analysis
disaster mechanism
treatment measures
