摘要
根据宁启铁路K53段地下水发育路堑并行既有线增建复线的特点,分析了在地下水发育路堑段采用钢筋混凝土U型槽的必要性。目前对于U型槽常采用的计算方法为,底板采用文克勒地基梁模型分析,而侧板采用悬臂梁模型,按照静止土压力计算;K53段工程采用有限元软件MIDAS对U型槽结构整体进行模拟,采用板单元分析路堑结构的变形及受力特征,并结合基坑围护和基底处理等设计措施,以解决施工及运营期间的地下水渗流和渗透问题。
According to the characteristics of double line added to the existing line which is in parallel to the cutting with developing groundwater in K53 Section of Nanjing-Qidong Railway, the necessity of using reinforced concrete U-shape groove in the section of the cutting with developing groundwater is analyzed. Currently, U-shape groove is commonly calculated in such manner that the floor plate is analyzed with Winkler Foundation Beam Model and the side plate is calculated by earth pressure at rest with cantilever beam model. In the project of K53 Section, the finite element software MIDAS is used to simulate integral structure of U-shape groove and the plate unit is used to analyze deformation and forcing characteristics of cutting structure ; furthermore, combined with the designs of foundation pit support and foundation treatment, the groundwater seepage in construction and operation period could be solved.
出处
《路基工程》
2012年第2期166-170,共5页
Subgrade Engineering
关键词
地下水
路堑
并行
U型槽
有限元
groundwater
cutting
parallel
U-shape groove
finite element
