考虑分层填筑及地应力平衡的挡土墙数值仿真
摘要:针对重力式挡土墙墙后分层填土对墙身受力影响的问题,深入研究分析墙背土压力动态变化值及规律性,利用大型通用有限元分析软件ADINA,建立了平面应变单元及墙、土接触单元的有限元计算模型,并且综合考虑墙后回填土Mohr-Coulomb材料本构模型,初始地应力场平衡、墙后回填土分层碾压填筑,设置墙、土之间的接触受力进行有限元分析计算,最终采用库仑主动土压力理论计算、预埋土压力仪器监测与有限元仿真计算结果进行对比分析,能够准确地反映墙后回填土因分层填筑而导致土压力变化的规律及三者偏差幅度规律,为同类重力式挡土墙在土基上的设计和施工提供科学的技术支撑和经验参考。
Abstract:Focusing on the influence of layered soil filling behind the gravity retaining wall on the stress of the wall body, the dynamic change value and regularity of earth pressure behind the wall are studied and analyzed. The finite element calculation model of plane strain element and contact element of wall and soil is established by using the large-scale general finite element analysis software ADINA, and the Mohr-Coulomb material constitutive model of backfill behind the wall is comprehensively considered. The initial ground stress field is balanced, the backfill behind the wall is compacted and filled in layers, and the contact forces between the wall and the soil are set for finite element analysis and calculation. Finally, the Coulomb active earth pressure theory, the embedded earth pressure monitoring instrument and the finite element simulation results are used for comparative analysis, which can accurately reflect the law of the earth pressure change caused by layered filling of the backfill behind the wall and the deviation amplitude of the three. The law of degree provides scientific technical support and experience reference for the design and construction of similar gravity retaining wall on soil foundation.
中文标题：
考虑分层填筑及地应力平衡的挡土墙数值仿真
Numerical Simulation of Retaining Wall Considering Layered Filling and Initial Ground Stress Balance
作者：
张红叶
Zhang Hongye
作者简介:张红叶,女,1987年生,江苏盐城人,硕士研究生,工程师,主要从事混凝土结构设计与检测。E-mail:1033461990@qq.com
通讯地址：
盐城市建设工程质量检测中心有限公司, 江苏盐城 224000
YanchengCityConstructionEngineeringQualityInspectionCenterCo.,Ltd.,Yancheng224000,Jiangsu,China
中图分类号:TU431
doi:10.3969/j.issn.1007-2993.2021.01.006
出版物：岩土工程技术
收稿日期:2019-12-10
网络出版日期:2021-07-06
刊出日期:2021-07-06
关键词:重力式挡墙,初始地应力,分层碾压填筑,接触面单元,主动土压力
Key words:gravity retaining wall,initial ground stress of foundation,layered compacted filling,contact unit,active earth pressure
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