基于FLAC3D的某酒厂高填方地基变形分析

Analysis of deformation of high fill foundation of a winery based on FLAC3D

以郎酒厂约40m厚的高填方工程为背景,通过室内大型试验获取填料物理力学特性与本构模型参数,分析高填方地基沉降变形机理,采用FLAC3D有限差分软件建立三维模型,利用自主开发Duncan-ChangE-B本构模型对填筑体在施工期不同高度下的沉降变形进行分析。结果表明:在土石比为3:7的泥质灰岩填料预测施工期高填方沉降时,Duncan-Chang E-B本构模型具有较好的适用性;施工期高填方地基沉降量随填筑高度呈指数关系增长,同时,高填方原地基所处应力也不断增大,且表现为距离基底越近所受应力越大。

Taking the 40 m-thick high-fill project of Lang Distillery as the background, the physical and mechanical properties of the filler and the constitutive model parameters were obtained through large-scale indoor experiments, and the mechanism of settlement and deformation of the high-fill foundation was analyzed. The Duncan-Chang EB constitutive model was developed to analyze the settlement and deformation of the filling body at different heights during the construction period. The results show that the Duncan-Chang EB constitutive model has good applicability when argillaceous limestone with a soil-to-rock ratio of 3:7 predicts the settlement of high fills during construction;The height increases exponentially, and at the same time, the stress on the original foundation of the high fill is also increasing, and it shows that the closer the distance to the base, the greater the stress.