某砂质边坡采用土钉墙支护坍塌机理分析与探讨

Analysis and discussion on collapse mechanism of soil nail wall support in a sandy slope

砂质边坡采用土钉墙支护结构在施工过程中容易发生坍塌事故,这与边坡土质有一定的关系,也与设计缺陷、违章作业、施工措施不当、监测及管理不到位等有关系。本文根据某基坑工程实例,深入分析了本案例砂质边坡坍塌的根本原因是违章作业,次要原因是设计、施工及管理上存在一定的不足。最后作者总结出当砂质边坡采用土钉墙支护时,应根据砂质边坡的特点及土钉墙支护结构受力特点来进行合理的设计和制定针对性的施工措施来确保边坡的稳定,为以后砂质边坡采用土钉墙支护时提供参考和借鉴。

The soil nail wall supporting structure of sandy slope is prone to collapse in the construction process,which has certain relationship with the soil quality of the slope,as well as design defects,illegal operations,improper construction measures,inadequate monitoring and management,etc.Based on an example of a foundation pit engineering,this paper deeply analyzes that the primary cause of sandy slope collapse in this case is illegal operation and the secondary reason is the insufficiency in design,construction and management.Finally,the author summarizes that when the sandy slope is supported by soil nail wall,it is necessary to make reasonable design and specific construction measures according to the characteristics of the sandy slope and the stress characteristics of the soil nail wall supporting structure to ensure the stability of the slope,so as to provide reference for the later sandy slope when using soil nail wall support.