岩土工程学报2024，Vol.46Issue(4)：764-773,10.DOI:10.11779/CJGE20220928
刚性挡土墙后轻量土静止土压力特性模型试验研究
Model tests on earth pressure at rest of light weight soil behind rigid retaining walls
摘要
Abstract
To study the reduction mechanism of earth pressure on retaining wall for light weight soil,the model tests on a large-scale rigid retaining wall are conducted.The uniform loads are applied on the filling surface by heavy stacking.When the remolded loess and light weight soil are used as backfilling behind the wall,the distribution laws of earth pressure at rest are analyzed respectively.The results show that the earth pressure at rest of the light weight soil gradually increases with the increase of curing period,but the increase range gradually decreases.The earth pressures at rest of the remolded loess and the light weight soil increase approximately linearly with the increase of filling depth.Moreover,they gradually increase with the increase of the upper loads,and the increase range of earth pressure at rest for the remolded loess is obviously larger than that of the light weight soil.By comparing their earth pressures at rest,it is found that the light weight soil has an obvious pressure reduction effect,and the greater the uniform loads applied on the filling surface,the better the pressure reduction effects of the light weight soil.The coefficient of earth pressures at rest of the remolded loess and light weight soil is not constant.The range of coefficient of earth pressure at rest for the remolded loess is 0.34～0.78,and that of the light weight soil is 0.22～0.55.When the uniform loads are applied on the surface of the filling,the traditional earth pressure theory has a high applicability to calculate the earth pressure at rest of the remolded loess,but the calculation error of the light weight soil is larger.Based on the model tests and traditional earth pressure theory,a modified formula for the earth pressure at rest for the light weight soil is proposed.It is found that the relative error is mainly 1.01%～23.13%.The characteristics of earth pressure at rest of the light weight soil are revealed through the model tests and theoretical calculation,which is of great significance to improving the earth pressure theory of the light weight soil.关键词
轻量土/静止土压力/静止土压力系数/修正公式/模型试验Key words
light weight soil/earth pressure at rest/coefficient of earth pressure at rest/modified formula/model test分类
建筑与水利引用本文复制引用
侯天顺,张建成,舒博..刚性挡土墙后轻量土静止土压力特性模型试验研究[J].岩土工程学报,2024,46(4):764-773,10.基金项目
国家自然科学基金项目(51509211) （51509211）
中国博士后基金项目(2016M602863) （2016M602863）
陕西省留学人员科技活动择优资助项目(2018031) （2018031）
陕西省社会发展科技攻关项目(2015SF260) （2015SF260）
陕西省博士后基金项目(2017BSHYDZZ50) （2017BSHYDZZ50）
西安市岩土与地下工程重点实验室开放基金项目(XKLGUEKF21-02) （XKLGUEKF21-02）
陕西省自然科学基金项目(2024JC-YBMS-354) （2024JC-YBMS-354）
