堆载对明挖隧道基坑围护结构的影响  

Study on the Influence of Heaped Load on the Pit Support Structure of Open-cut Tunnel in Jizhou Road

作　　者：蔡连利 CAI Lianli(China Railway Sixteenth Bureau Group Co.,Ltd.,Beijing 100018,China)

机构地区：[1]中铁十六局集团有限公司,北京100018

出　　处：《路基工程》2023年第1期228-233,共6页Subgrade Engineering

基　　金：中铁十六局集团北京轨道交通工程建设有限公司科技研发计划项目(KYJS-001)。

摘　　要：依托郑州市冀州路明挖隧道基坑施工,采用有限元分析软件建立三维数值模型,研究堆载对基坑周围土体沉降、坑底隆起及桩身水平位移的影响,结果表明:基坑周围土体沉降、坑底隆起变形及桩身水平位移均随基坑开挖而逐渐增大;基坑围护结构的变形量均在设计控制范围内,在该施工条件下,基坑结构整体安全。In relation to the pit construction of Jizhou road open-cut tunnel in Zhengzhou, a three-dimensional numerical model is established by finite element analysis software, and the influence of heaped load on the settlement of soil around the pit, the upheaval of the pit bottom and the horizontal displacement of the pile shaft is studied. The results show that the settlement of soil around the pit, the upheaval of the pit bottom and the horizontal displacement of the pile shaft increase gradually with the excavation of the pit. The deformation of the pitsupport structure is within the design control range. Under this construction condition, the pit structure is safe on the whole.

关 键 词：明挖基坑 一侧堆载 围护结构变形 数值模拟 桩身水平位移 周围土体沉降 坑底隆起 

分 类 号：TU932[建筑科学—结构工程]