论文部分内容阅读
为了揭示土钉+水泥土搅拌桩复合土钉墙的受力规律,采用数值模拟方法,建立了整体三维有限元计算模型,模型考虑了基坑的空间作用,克服了二维平面或局部三维有限元模型的不足,模拟了复合土钉墙的施工过程,分析了土钉的轴力,计算结果表明:(1)基坑的“角点效应”对土钉轴力的影响范围约为0.5倍的开挖深度;(2)每排土钉轴力峰值处距开挖面0.2~0.25倍的钉长;(3)中下部土钉受力较大.
In order to reveal the stress of soil nailing + cement-soil mixing pile composite soil nailing wall, a three-dimensional finite element model was established by numerical simulation. The model considered the space effect of foundation pit and overcame the two-dimensional plane or local finite three- This paper simulates the construction process of composite soil nailing wall and analyzes the axial force of soil nailing. The calculation results show that: (1) the influence of “corner effect” of foundation pit on the axial force of soil nail is about 0.5 times the excavation depth; (2) Each row of soil nail peak axial force from the excavation surface 0.2 ~ 0.25 times the length of the nail;