毛竹复合土钉墙水平位移影响因素数值分析研究  

Numerical Analysis of Factors Affecting Horizontal Displacements of Composite Moso Bamboo Soil Nailing Walls

作　　者：戴自航[1,2] 欧煜 

机构地区：[1]福州大学岩土工程研究所,福建福州350108 [2]卧龙岗大学土木采矿和环境工程学院

出　　处：《水利与建筑工程学报》2014年第6期14-20,49,共8页Journal of Water Resources and Architectural Engineering

基　　金：福建省自然科学基金资助项目(2011J01308)

摘　　要：针对软土基坑毛竹复合土钉墙支护对变形预测和控制等方面研究的不足,采用考虑毛竹土钉和毛竹排桩与土体的相互作用以及土体加、卸载条件下变形模量不同的有限元法,建立某基坑支护设计剖面的平面应变有限元模型。计算并分析了毛竹复合土钉墙支护结构的变形规律,并对影响坡面水平位移的因素,即毛竹土钉的倾角、长度、间距、布置形式,毛竹排桩的长度、数量,土体参数以及开挖的坡度进行了详细的定性分析与定量评价,其结论可以为进一步认识毛竹复合土钉墙支护结构的作用机理提供依据,同时可为设计施工提供参考。In view of the insufficient research on predicting and controlling deformations of composite moso bamboo soil nailing walls ,the plane-strain finite element model was established by using the finite element method based on a de-signed profile of the excavation pit support structure .In the process of establishing this model ,the interaction mechanism of the nail-soil and pile-soil ,the differences of the deformation moduli of the soil under loading or unloading conditions were considered ,and the deformation laws of this sort of retaining structure was analyzed .In addition ,the qualitative analysis and evaluations on multiple influencing factors including the inclination angles ,lengths ,allocations and intervals of soil nails ,the lengths and the numbers of rows of piles ,the soil parameters ,as well as the excavation angles ,which affected the horizontal displacements of soil nailing walls were carried out in detail .The research outcomes can provide some basis for better comprehension on the working performance of composite moso bamboo soil nailing walls and can be of some referential value to the design and construction of these walls .

关 键 词：毛竹复合土钉墙 水平位移 影响因素 数值分析 

分 类 号：J753[艺术—舞蹈]