摘要
为了揭示黄土高填方的沉降规律,并预测其工后沉降,对某高填方的监测成果进行分析,将FEM数值计算与分层迭代反演方法结合,对高填方的工后沉降进行反演预测。分析结果表明:填方体自身沉降占总沉降的63%而原地基沉降占37%,施工期产生沉降的主要原因是非饱和土孔隙气压密及排气固结,原地基和填方厚度的不均匀是地表差异沉降的主要原因。分层迭代反演法与FEM结合能更精确的反映施工加载对填土形变参数的影响,采用反演参数预测沉降值与现有实测数据吻合较好。
In order to reveal the settlement behaviors of high filled embankment and to predict the post-construction settlement, the long-term in-situ monitoring data of a certain high filled loess embankment were analyzed with the FEM computation and the method of layered iteration to inversely predict the post-construction settlement. The results show that the settlement of the embankment itself is the main part of the total settlement and accounts for 63% of the total settlement, while the original ground settlement accounts for 37%. The construction settlement is mainly caused by the compression of the pore air and exhaust consolidation. The uneven foundation and different heights are the main reasons of differential surface settlement.
作者
葛苗苗
李宁
张炜
郑建国
朱才辉
GE Miaomiao LINing ZHANG Wei ZHENG Jianguo ZHU Caihui(Institute of Geotechnical Engineering, Xi＇an University of Technology, Xi＇an, Shaanxi 710048, China School of Civil Engineering, LanzhouJiaotongUniversity, Lanzhou, Gansu 730070, China , China Jikan Research Institute of Engineering Investigation and Design Co., Ltd., Xi＇an, Shaanxi 710043, China)
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2017年第3期745-753,共9页
Chinese Journal of Rock Mechanics and Engineering
基金
国家科技支撑计划项目(2013BAJ06B02)
国家自然科学基金资助项目(51179153
51308456)~~
关键词
土力学
黄土高填方
沉降监测
孔隙水压
反演分析
工后沉降
soil mechanics
high filled loess embankment
settlement monitoring
pore water pressure
inversion analysis
post construction settlement
作者简介
葛苗苗（1988-），女，2011年毕业于西安理工大学水利水电工程专业，现为博士研究生，主要从事黄土高填方沉降预测及岩土工程数值仿真分析方面的研究工作。E-mail：gemiaomiao163@163．com
