土钉轴力值的计算研究

STUDY ON CALCULATION OF AXIAL FORCE OF SOIL NAIL

对土钉墙基坑支护土钉轴力进行研究,为土钉墙基坑支护技术的应用提供技术支持。室内试验模型按照“相似模型的几何长度与变形时间成反比”的相似法则进行设计,共进行了两组模型试验:粘土土钉墙试验、砂土土钉墙试验。将采用新方法计算的土钉轴力值与试验实测值进行对比,结果表明:(1)传统的土钉轴力计算理论是不能计算模型试验中土钉轴力的;(2)采用新计算方法计算出的模型试验的土钉轴力是可靠的。

The axial force of soil nailing in soil nailing wall foundation pit is studied, which provides technical support for the application of soil nailing wall foundation pit support technology. The laboratory test model was designed according to the similarity rule that “the geometric length of similar model is inversely proportional to the deformation time”. Two groups of model tests were carried out: clay soil nailing wall test and sand soil nailing wall test. The results show that :(1) the traditional theory of soil nail axial force calculation cannot calculate the soil nail axial force in model test;(2) The axial force of soil nail in model test calculated by the new method is reliable.