考虑荷载及含水率变化的黄土高填方地基沉降变形计算  

Calculation of Settlement and Deformation of Loess High Fill Foundation Considering Load and Moisture Content Change

作　　者：赵壮福 朱彦鹏[2] 李莲 丁佳玥 ZHAO Zhuangfu;ZHU Yanpeng;LI Lian;DING Jiayue(Department of Civil Engineering,Chengdu Technological University,Yibin 644000,China;School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]成都工业学院土木工程系,四川宜宾644000 [2]兰州理工大学土木工程学院,兰州730050

出　　处：《成都工业学院学报》2024年第4期15-20,共6页Journal of Chengdu Technological University

基　　金：成都工业学院人才项目博士基金(2023RC050);成都工业学院实验室开放基金(2023LOF011)。

摘　　要：黄土高填方的沉降变形控制是工程建设中的重点和难点,基于分层总和法的思想,通过引入Gunary应力应变模型和割线模量法,提出考虑荷载变化和含水率变化的黄土高填方地基沉降变形计算方法。结合算例,对高填方地基的沉降变形进行预测及验证。结果表明,黄土高填方沉降变形的主要来源是施工期间因荷载变化而引起的沉降。随着填土高度的增加,因含水率发生变化产生的广义增湿湿陷沉降占总沉降的比例逐渐增加。压实度控制对高填方工程至关重要,压实度越高,总沉降量越小。研究成果丰富了黄土高填方地基沉降变形的计算理论,为黄土高填方工后沉降和湿陷沉降的研究提供理论依据,对黄土高填方工程的施工和工后沉降控制具有一定的参考价值。Settlement deformation control of loess high fill is the key and difficult point in engineering construction.Based on the idea of layerwise summation method,by using the Gunary stress-strain model and secant modulus method,the calculation method of settlement deformation of loess high fill foundation considering load change and water content change was put forward.Combined with an example,the settlement deformation of high fill foundation was predicted and verified.The results show that the main source of settlement deformation of loess high fill is the settlement caused by load change during construction.With the increase of filling height,the proportion of generalized humidification and collapsible settlement caused by the change of water content to the total settlement increases gradually.The control of compactness is crucial to high fill engineering.The higher the compactness,the lower the total settlement.The research results of this paper enrich the calculation theory of settlement deformation of loess high fill foundation,and provide theoretical basis for the study of post-construction settlement and collapsible settlement of loess high fill,and have certain reference value for the construction and post-construction settlement control of loess high fill engineering.

关 键 词：黄土 高填方 地基 沉降 

分 类 号：TU470[建筑科学—结构工程]