重载双联煤仓复合地基沉降变形特性  

Subsidence deformation characteristics of heavy-load double-linked coal bunker composite foundation

作　　者：钱思众 杨少帅 张乾 QIAN Sizhong;YANG Shaoshuai;ZHANG Qian(China Coal Xi’an Design Engineering Co.,Ltd.,Xi’an 710054,China)

机构地区：[1]中煤西安设计工程有限责任公司,陕西西安710054

出　　处：《陕西煤炭》2025年第3期1-8,40,共9页Shaanxi Coal

摘　　要：基于某煤仓既有复合地基工程实例,通过现场测试和沉降监测,结合FLAC 3D数值模拟方法,研究了煤仓建筑在变幅荷载作用下复合地基沉降变形特性。结果表明,随着煤仓储煤量变化,复合地基变形曲线呈波浪形变化,即荷载增加,地基发生沉降;荷载减少,沉降变形逐渐恢复,最终产生残余变形;在各周期加载-卸载作用下,复合地基沉降变形和残余变形均呈现由中心到边缘逐渐增大的趋势;地基残余变形量受荷载大小和作用时间影响,荷载越大,地基残余变形越大。当荷载大小与作用时间呈周期变化时,地基残余变形随荷载循环周期增加而增加,最终导致地基中心与边缘区域沉降差异不断扩大。Based on the existing composite foundation engineering examples of a coal bunker,field testing and subsidence monitoring,combined with the FLAC 3D numerical simulation method,we studied the subsidence deformation characteristics of coal bunker buildings under variable load.The results showed that with the change of coal storage capacity,the composite foundation deformation curve changed in a wave shape,that is,the load increased,the foundation subsidence occurred,the load decreased,the subsidence deformation gradually recovered,and finally the residual deformation occurred.Under each cycle of loading-unloading,the composite foundation subsidence deformation and residual deformation have a tendency to increase from the center to the edge;The amount of residual deformation of the foundation is affected by the size of the load and the time of action.The greater the load,the greater the residual deformation of the foundation;The residual deformation increases with the increase of the cycle period of load,resulting in the continual enlarge of differences of the foundation center and edge area’s subsidence.

关 键 词：煤仓建筑 复合地基 变幅荷载 沉降变形特性 数值模拟 

分 类 号：TU433[建筑科学—岩土工程]