|Table of Contents|

Research on application of improved layered summation method in settlement and deformation of high fill foundation in loess area(PDF)

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

Issue:
2024年03期
Page:
159-168
Research Field:
岩土工程
Publishing date:

Info

Title:
Research on application of improved layered summation method in settlement and deformation of high fill foundation in loess area
Author(s):
ZHU Yanpeng1;  DONG Huaitang1; 2;  WEI Jieqiang2;  ZHAO Jun2; WANG Yixuan2
(1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China; 2. China Construction Science and Industry Corporation Ltd., Shenzhen 518107, Guangdong, China)
Keywords:
layered summation method;  loess area;  foundation settlement;  Gunary model;  secant modulus method
PACS:
TU43
DOI:
10.19815/j.jace.2022.07003
Abstract:
The settlement deformation control of loess high fill is the key and difficult point of engineering construction. The deformation characteristics of remolded loess under the variation of self-weight stress and moisture content were summarized through laboratory confined compression test and humidification test. Based on the idea of layered summation method, the Gunary model and secant modulus method were introduced, the settlement of loess high fill foundation was divided into construction settlement caused by load and post-construction settlement caused by water content change, and the calculation method of settlement deformation of loess high fill foundation was put forward. Combined with the practical engineering background, the settlement deformation of high fill engineering was predicted. The results show that the main source of loess high fill settlement is the settlement caused by construction load. With the increase of fill height, the proportion of post-construction settlement to total settlement increases gradually. Under the optimum water content, when the compactness is over 95% during the construction period, the exhaust consolidation of soil can be completed, and the drainage consolidation of soil can be completed in the later construction period. The control of compaction degree is very important for high fill engineering. The research results 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 foundation. It is of certain reference value to the construction and post-construction settlement control of loess high fill project.

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Last Update: 2024-05-20