桩基逆作法在桥梁深水基础中的应用  

Application of Pile Foundation Constructed in Reverse Order to Deep Water Foundation of Bridge

作　　者：徐国平[1] 龚维明[2] 付佰勇[3] 高衡[1] 刘高[3] 黄李骥[3] 

机构地区：[1]中交公路规划设计院有限公司,北京市100088 [2]东南大学土木工程学院,南京市210096 [3]中交公路规划设计院有限公司桥梁技术研究中心,北京市100088

出　　处：《公路》2009年第10期6-11,共6页Highway

基　　金：国家863计划专题课题;项目编号2007AA11Z102

摘　　要：基于琼州海峡跨海通道工程研究中提出的沉箱与钢管桩逆作法复合基础型式,对桩基逆作法在桥梁深水基础中的应用进行了初步介绍。论述了该方法的简化设计分析理论、适用范围、施工可行性以及预期效果等内容。简化计算表明桩基逆作法在水深较深、软弱土层厚、土层渗透性较好、表层土强度相对较高的桥梁基础中具有较好的适用性。该方法考虑了桩土共同作用,并使部分沉降发生在施工阶段,具有工后沉降可控、造价低等优点。Application of pile foundation constructed in reverse order to deep water foundation is primarily introduced on the basis of the composite foundation of caisson and steel pipe piles proposed in the research of connecting line bridge across the Qiongzhou Strait. Simplified analysis theory, scope of application, feasibility of construction and desired effect are all presented in turn. Calculation shows that the reverse order method has good feasibility in foundation with the construction conditions of deep water, deep soft soil layers, good permeability of soil layers, high strength of topsoil. This method could consider the pile-soil interaction and make part of settlement to occur in the construction stage. Thus small post construction settlement and low cost are the advantages for foundations of this method.

关 键 词：逆作法 复合基础 桩土共同作用 沉降控制 

分 类 号：TU473.2[建筑科学—结构工程]