木桩桩间土承载力系数及地基沉降系数反演计算  

Back Analysis of Bearing Capacity and Settlement Coefficients of Soil Among Timber Piles

作　　者：廖镜旺 刘川顺[1] 刘勇 LIAO Jingwang;LIU Chuanshun;LIU Yong(State Key Laboratory of Water Resources and Hydropower Engineering,Wuhan University,Wuhan 430072)

机构地区：[1]武汉大学水资源与水电工程国家重点实验室,武汉430072

出　　处：《土工基础》2023年第1期74-77,共4页Soil Engineering and Foundation

基　　金：国家自然科学基金(51879203)。

摘　　要：木桩用于小型工程软土地基处理,造价低、取材容易、施工便捷,因而得到广泛应用。木桩复合地基设计可按黏结材料桩复合地基计算,但现有桩基设计规范缺乏关于桩间土承载力发挥系数β和沉降经验系数φs的取值标准,而这两个值是复合地基设计的重要参数,直接影响工程的安全和造价。运用Plaxis软件模拟计算杉木桩复合地基竖向应力和沉降,并根据有限元计算结果反演β和φs这两个经验系数的取值,从而方便基层设计人员直接套用桩基规范公式进行木桩复合地基设计。考虑到木桩的这两个经验系数的取值可能受木桩类型、土层分布、土层物理力学参数等因素影响,因此木桩经验系数有待通过更多工程的计算分析和实际应用的积累得到完善。The timber pile is widely used in the soft soil improvement of small projects because of its low cost,easy material source and convenient construction.The design of composite foundation of timber pile can be estimated according to the composite foundation of cement-material columns.However,the existing design code of pile foundation lacks the values of the coefficientβof the bearing capacity of soil among timber piles and the empirical coefficient of settlementφs,which are important parameters of the composite foundation design and directly affect the safety and cost of the project.In this paper,PLAXIS software is used to simulate the estimating of Chinese fir timber pile composite foundation,and two empirical coefficients can be obtained from the back analysis,which can be used for a reference in the practical engineering application.

关 键 词：木桩复合地基 地基处理 淤泥质土地基 桩间土承载力发挥系数 沉降经验系数 

分 类 号：TU473[建筑科学—结构工程]