摘要
为研究武汉市长青区管槽基坑工程地下连续墙在地震工况下的响应规律,采用FLAC2D软件,构建基坑地震响应快速模拟方法。对基坑地下连续墙结构分别进行不同地震波作用位置和地层类型下的响应分析。结果表明地震波越接近于地下连续墙时,墙体弯矩和剪力越大,对墙体的破坏作用越大。在密砂地层中,墙体弯矩明显小于在松砂地层中,但剪力大于松砂地层中的剪力。另外,在地震作用下,地下连续墙的弯矩和剪力分别达到静力分析的2.8倍和2.7倍。横向支撑在地震作用下轴力将增大,极有可能破坏。因此,建议在高地震烈度区,基坑设计应充分考虑地震破坏作用。
To study the response law of underground diaphragm wall of pipeline groove foundation pit project in Changqing District of Wuhan city under seismic conditions,the rapid simulation method of foundation pit earthquake response is established by using FLAC2D software.The response analysis of diaphragm wall structure of foundation pit under different seismic wave applying positions and stratum type is carried out.The results show that the closer the seismic wave is to the diaphragm wall,the greater the bending moment and shear force of the wall,the greater the destructive effect on the wall.In the dense sand,the bending moment of the wall are obviously smaller than those in the loose sand.However,the shear force is larger than that in the loose sand.In addition,under seismic load,the bending moment and shear force of diaphragm wall are 2.8 and 2.7 times of the static analysis,respectively.The axial force of bracing support will increase under the action of earthquake,which is very likely to be destroyed.Therefore,it is suggested that in the high seismic intensity area,the foundation pit design should fully consider the seismic damage.
作者
李漪
谢文涛
王红伟
彭斌
曹伟腾
LI Yi;XIE Wentao;WANG Hongwei;PENG Bin;CAO Weiteng(PowerChina Hubei Electric Engineering Co.,Ltd.,Wuhan 430040,China;China University of Geosciences(Wuhan),Wuhan 430074,China)
出处
《电力勘测设计》
2024年第4期84-90,共7页
Electric Power Survey & Design
基金
高承压水下“两墙合一”地下连续墙关键建造技术研究,湖北省电力规划设计研究院有限公司资助项目(k2021-2-04)。
关键词
基坑
地下连续墙
横向支撑
地震响应分析
数值模拟
foundation pit
underground diaphragm wall
bracing support
seismic response analysis
numerical simulation
