【摘要】 因基坑边坡变形导致周边建筑物变形甚至破坏出现安全事故的事件时有发生,了解边坡变形破坏特征和诱发因素是杜绝此类事故发生的有效途径。以巴东县文化广场基坑边坡为例,调查了场地外动力条件、地表裂隙空间展布和形态特征,研究了地表裂隙发育规律和受力特征。研究表明:文化广场及其邻近地区工程地质条件复杂、地质环境脆弱是导致边坡变形的内在因素;文化广场施工开挖是诱发裂隙形成的主要外动力因素;降雨作用则加剧了边坡变形的程度。应用FLAC软件验证了降雨和人工开挖对基坑边坡顶部变形的影响,结果表明与现场调查情况基本一致。最后,在此基础上,提出了相应的防治措施。更多还原

【Abstract】 Deformation of excavation slope can lead to the deformation or even destruction of its nearby buildings,threatening the safety of people’s life and assets. An effective way to prevent such accidents is to have adequate knowledge of the deformation and damage characteristics,along with the inducing factors. Herein we took the excavation slope at the Cultural Square in Badong county as an example,and investigated the site’s external dynamic conditions,inspected the spatial distribution and morphological characteristics of the surface fissures and analyzed its development patterns and mechanical characteristics. The study shows that the complex engineering geological conditions and weak geological environment are internal factors that lead to the deformation of the foundation pit slope; while the excavation is the major external dynamic factor that induces fissures,and precipitation intensifies the deformation of the excavation slope. Furthermore,FLAC software was used to verify the influence of excavation process and precipitation on ground surface deformation,which is consistent with the site investigation result. Finally,corresponding prevention measures are put forward.更多还原