摘要
湛江湾深挖竖井结构埋藏于全水头砂层中,主要由连续墙及变截面的内衬组成,通过三维模型的荷载结构法及地层结构法对竖井施工阶段进行数值模拟,考虑连续墙的接头作用,分析连续墙及内衬的应力分布规律,并将数值结果与监测结果进行了比较,结果表明,施工期竖井连续墙及内衬墙均以受压为主,连续墙环向应力大于竖向应力,且大于内衬墙受力,为主要受力结构;连续墙的接头效应明显,考虑接头作用后,内衬墙受力明显增大,而环向应力受连续墙接头及内衬三维作用明显,类似工程应该予以考虑;实测值与计算值尚有一定的差异,连续墙及内衬受力较为复杂,其成果可为今后沿海高水头深挖竖井的设计、施工提供参考。
The deep-cut shaft structure is buried in the sand layer with full water head in Zhanjiang Bay, mainly composed of the diagram wall and the variable cross-section lining wall. Through the numerical simulation of the shaft structure in construction stage by the load structure method and stratum structure method of the three-dimensional model, considering the joint effect of the diagram wall, the stress distribution law of continuous wall and lining wall is analyzed and the numerical results and monitoring results are compared in this paper. The results show that the diagram wall and lining wall of the shaft in the construction stage are mainly in compression and the diagram wall is the main force structure of which the circumferential stress is greater than the vertical stress ; the joint effect of the diagram wall is obvious and the stress of the lining wall is obviously increased after the joint effect is considered, while the circumferential stress is obviously influenced by the joint effect of the diagram wall and the space effect of the lining wall, which should be considered in similar engineering; the measured value and calculated value still has certain difference for the complex stress distribution law of the diagram wall and lining wall, but the results can provide a reference for the future design and construction of the coastal deep-cut shaft in high water head.
作者
姜燕
杨光华
王瑞兰
陈富强
李志云
JIANG Yan YANG Guanghua WANG Ruilan CHEN Fuqiang LI Zhiyun(Guangdong Research Institute of Water Resources and Hydropower, Geotechnical Engineering Technology Center of Guangdong Province, Guangzhou 510635, China South China University of Technology, School of Civil Engineering and Transportation, Guangzhou 510641, China)
出处
《广东水利水电》
2017年第8期57-63,共7页
Guangdong Water Resources and Hydropower
基金
广东省水利科技创新项目(编号:2009-25)
国家自然科学基金(编号:51378131)
关键词
湛江湾
深挖竖井
深厚砂层
数值分析
监测分析
Zhanjiang Bay
deep-cut shaft structure
deep and thick sand layer
numerical analysis
monitoring analysis
