摘要
为了寻求深层搅拌桩复合地基沉降计算的简便方法,根据已有的研究成果,进行了桩与桩周土间摩檫力分布规律的假设和简化,运用单位元法推导了深层搅拌桩复合地基沉降计算公式和设计用曲线,同时采用轴对称有限元法,对一实际工程的实测成果进行了分析。计算结果表明:文中理论计算的各级荷载下的沉降量值介于分层总和法与有限元法计算值之间,但文中方法比有限元计算法简单,比分层总和法更合理。
In order to seek a simple theoretical approach to predict the settlement of composite ground reinforced by deep-mixing pile group,assumptions and simplifications of the distribution behavior of skin friction between the pile and the surrounding soil were made based on previous researches.Then a calculation formula and curves of practical data for settlement of the composite ground were derived with the application of unit cell method(UCM).The field test data of a project were analyzed by axi symmetric FEM.It is shown that the calculated value of layer-wise summation method(LSM),the proposed method and FEM are all larger than field test value under each grade of load;and the proposed solution is between that of LSM(high)and FEM(low).Thus,the method proposed is simpler than FEM and more rational than LSM.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2002年第3期309-315,320,共8页
Rock and Soil Mechanics
基金
教育部优秀青年教师教学和科研奖励基金资助
关键词
复合地基
沉降
单位元法
有限元法
分层总和法
composite ground
settlement
unit cell method(UCM)
finite element method(FEM)
layer-wise summation method(LSM)
