摘要
在确保安全的前提下,为有效节约深基坑支护工程的成本,经常使用土钉与桩锚联合支护结构。但目前为止该联合支护结构没有一个可靠的位移计算方法。为研究土钉与桩锚联合支护结构变形的规律,建立了三维有限元模型,对其变形机制进行了动态分析。通过与工程实例数据对比表明,三维有限元分析成果与实际监测数据较接近。其中上部的土钉支护位移呈楔体状,并且滑裂面随开挖深度加大向后缘发展,土钉逐渐远离滑裂面,对整体稳定影响越来越小。三维有限元为土钉与桩锚联合支护结构提供了可靠的位移计算方法,并可预测每一工况变形,为设计及施工提供重要参考。
Under the premise of ensuring safety, for the effective conservation of urban excavation project cost, soil nail walland pile anchor combined support structure often used. But so far, there is not a reliable method for calculating thedisplacement of the structure. In order to study the deformation of soil nail wall and pile anchor combined support structure,the 3D finite element model is established, and the dynamic analysis of the deformation is carried out. Compared with theengineering example, the results show that the 3D finite element analysis results are close to the actual monitoring data. Thedisplacement of the upper soil nailing is in a wedge shape, and the sliding surface is developed along with the excavationdepth and the sliding surface is developed along with the excavation depth. The soil nail is far away from the sliding surface,and the effect on the overall stability is smaller and smaller. 3D finite element method provides a reliable displacementcalculation method for soil nail wall and pile anchor combined support structure, and can predict the deformation of eachworking condition, which provides an important reference for the design and construction.
作者
潘启钊
林本海
PAN Qi-zhao;LIN Ben-hai(Shenzhen Gongkan Geotechnical Group Co..Ltd, Shenzhen 518000, China;Research Center of Underground Engineering and Geological Hazard, Guangzhou University, Guangzhou)
出处
《建筑监督检测与造价》
2016年第4期12-18,共7页
Supervision Test and Cost of Construction
关键词
土钉
联合支护
有限元
水平位移
soil nail wall
combined support
finite element
horizontal displacement
