双排桩复合土钉支护基坑的工程实例分析  

Analysis of behavior of nailing supported wall with double-row-pile in excavation

作　　者：杜烨[1] 王君鹏[2] 严平[3] 

机构地区：[1]山东科技大学矿山灾害预防控制教育部重点实验室,山东青岛266510 [2]青岛理工大学,山东青岛266520 [3]浙江大学,杭州310027

出　　处：《工程勘察》2010年第1期33-36,共4页Geotechnical Investigation & Surveying

基　　金：山东科技大学科学研究"春蕾计划"项目资助(2008BWZ001)

摘　　要：通过一个具体的工程实例,采用数值分析的方法,模拟基坑开挖过程中双排毛竹桩复合土钉支护结构的受力性状,并与实测结果进行了比较,探讨了影响双排桩复合土钉支护基坑侧向变形和体系内力的因素。通过有限元数值分析结果与现场实测数据对比表明,二维有限元数值分析在一定程度上能够反映现场双排桩复合土钉支护基坑开挖的变形和内力分布情况。计算结果表明:土钉中的内力与其位置有较大的相关性,中上部的土钉受力较大,底部的土钉受力较小;各层土钉轴力是在开挖下一层土体时引起的,并且随着开挖进行,土钉的轴力逐渐增大;双排桩的刚度对基坑的侧向位移有较大影响。The behavior of a nailed retaining wall with double-row-pile was analyzed through a case by using 2D FEM analysis. The retaining walls with double-row-pile were used for excavation work of a built foundation. The calculated results were compared with the field measured values. The results show that the numerical analysis can simulate field performance fairly well. The distribution of tension force in nail and stiffness of double-row-pile were discussed. The results show that stiffness of double-row-pile has great influence on the lateral displacements of the nailed walls.

关 键 词：基坑工程 双排桩 土钉支护 有限元 侧向变形 

分 类 号：TU472.99[建筑科学—结构工程]