土钉支护在黄土基坑中工作性能的试验研究

Study on the Working Performance of Soil Nailing in Loess Foundation Pit

为研究黄土基坑土钉支护结构中支护钉的工作性能,在某黄土基坑土钉支护现场选择1根试验钉进行拉拔试验,测试土钉受力后的内力分布及位移变化。试验结果表明,土钉在黄土基坑中有较好的工作性能,采用常规计算方法设计黄土工程中的土钉偏于保守。该试验对于改进黄土基坑土钉支护结构的设计方法具有一定的现实指导意义。

To study the working performance of soil nailing in loess foundation pit,pull-out test is carried out on one pilot soil nailing. The internal force distribution and the displacement varition of the soil nailing which has been loaded are studied. The result shows that the working performance of soil nailing in loess foundation pit is better, it is conservative to design soil nailing in loess foundation pit with the conventional calculation method. This test can be used to guide the design of soil nailing in loess foundation pit.