湿陷性黄土地区高填方地基工程关键技术问题与实践

引用文献:

梁永辉 黄玮 梁志荣 李伟. 湿陷性黄土地区高填方地基工程关键技术问题与实践[J]. 建筑结构,2023,48(01):121-128.

LIANG Yonghui HUANG Wei LIANG Zhirong LI Wei. Key technical problems and practice of high-fill foundation project in collapsible loess region[J]. Building Structure,2023,48(01):121-128.

作者:梁永辉 黄玮 梁志荣 李伟
单位:上海建筑设计研究院有限公司上海申元岩土工程有限公司 同济大学土木工程学院
摘要:以陕西省延安市某黄土高填方地基工程为研究对象,分析了我国西北湿陷性黄土丘陵沟壑区域开展挖填方工程面临的关键技术问题。详细介绍了工程的挖填方概况、工程地质和水文地质条件以及高填方地基设计和施工对策。结合场地形成的过程,对施工期及工后沉降监测数据进行分析,得到了黄土高填方场地形成过程中不同阶段地基沉降的特点和规律:填方区工后沉降量随填土厚度的增大而增大,填土厚度相近区域,原地基覆盖土层的厚度越大,工后沉降越大。
关键词:湿陷性黄土;高填方地基;场地形成;分层强夯;工后沉降;
作者简介:梁永辉,博士,高级工程师,主要从事岩土工程地基处理与基础工程等方面的科研和设计工作,Email:yonghui_liang@arcplus.com.cn。
基金:上海市优秀技术带头人计划资助(22XD1432800);华建集团技术带头人课题计划,华建集团科研基金项目(19-1类-0216地)。
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Key technical problems and practice of high-fill foundation project in collapsible loess region
LIANG Yonghui HUANG Wei LIANG Zhirong LI Wei
(Shanghai Shenyuan Geotechnical Engineering Co., Ltd., Shanghai Institute of Architectural Design & Research Co., Ltd. School of Civil Engineering, Tongji University)
Abstract: The key technical problems faced by the excavation and filling engineering in the collapsible loess hilly-gully regions in northwest China were analyzed based on a loess high-fill foundation project in Yan′an, Shaanxi Province. The general situation of excavation and filling, engineering geology and hydrogeology conditions, as well as the design and construction countermeasures of high-fill foundation of the project were introduced in detail. Combined with the process of site formation, monitoring data of the settlement during and after the construction were analyzed. The characteristics and laws of foundation settlement in different stages during the formation of loess high-fill site were obtained. The post-construction settlement of the filling area increases with the increase of the fill thickness. In the area with similar fill thickness, the greater the thickness of the original foundation covering soil layer, the greater the post-construction settlement.
Keywords: collapsible loess; high-fill foundation; site formation; layered dynamic consolidation; post construction settlement
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