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某基坑南侧支护工程原采用土钉墙支护,在土钉墙施工过程中,因遇连续降雨,靠近基坑南侧边坡处的地下排水管道由于排水不畅而导致雨水倒流进入土钉墙内;加上不规范的施工方法,致使正在施工中的土钉墙及边坡出现大面积的坍塌。针对这一工程事故进行详细地分析计算,在确定事故原因之后,对原设计方案作出调整;重新施工时,改用锚杆与砖墙组合方案。并对黄土地区土钉墙的施工提出了几点建议:注意排水、规范施工、动态设计以及信息化施工。
In the process of soil nailing wall construction, due to continuous rainfall, the underground drainage pipe near the slope on the south side of the foundation pit is caused by backflow of rain water due to the poor drainage Soil nail wall; with non-standard construction methods, resulting in construction of soil nail wall and slope collapse occurred in large areas. A detailed analysis and calculation of this project accident, after determining the cause of the accident, to make adjustments to the original design; re-construction, the switch to the combination of anchor and brick wall program. And put forward some suggestions on soil nailing wall construction in loess area: pay attention to drainage, standard construction, dynamic design and information construction.