|Table of Contents|

Analysis on settlement deformation law and influencing factors of loess high fill foundation(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2023年03期
Page:
161-169
Research Field:
岩土工程
Publishing date:

Info

Title:
Analysis on settlement deformation law and influencing factors of loess high fill foundation
Author(s):
ZHAO Zhuangfu1; 2;  ZHU Yanpeng1; 2;  YE Shuaihua1; 2
(1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China; 2. Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, Gansu, China)
Keywords:
loess high fill;  deformation law;  sensitivity analysis method;  numerical model;  influencing factor
PACS:
TU444
DOI:
10.19815/j.jace.2022.01037
Abstract:
In order to study the settlement deformation law and influencing factors of loess high fill foundation under different lateral constraint conditions, numerical models of flat fill foundation, sticking slope fill foundation and gully fill foundation were established using the finite element software PLAXIS3D. The settlement deformation laws of high fill foundation after construction were summarized, and the sensitivity analysis method was used to analyze the influencing factors of settlement deformation of loess high fill foundation. By comparing the theoretical calculation results in the literature, the effectiveness of the numerical model was proved. The study results show that different lateral constraint conditions have a significant impact on the settlement deformation of high fill foundation. The stronger the lateral constraint, the smaller the settlement deformation of the high fill, and vice versa. Among them, the settlement deformation of the flat fill foundation is the largest, followed by the sticking slope fill foundation, and the settlement deformation of the gully fill foundation is the smallest. The deformation control effect of the gully fill foundation with symmetrical terrain distribution is better than that of asymmetric terrain. As the filling height and filling speed increase, the post construction settlement of the fill foundation will also increase. Improving the compactness of the fill can significantly reduce settlement, but changing the thickness of the in-situ foundation treatment and the width of the valley bottom has a relatively small impact on settlement deformation.

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Last Update: 2023-05-20