紧邻桥台开口型基坑设计方案对比分析  

Comparative Analysis on Design Scheme of Open Type Foundation Pit Adjacent to Abutment

作　　者：潘红卫 王欣 蓝文海 邓涛[2] 韩灵瑞 

机构地区：[1]福州市城市地铁有限责任公司,福州350001 [2]福州大学土木工程学院,福州350108 [3]中国中铁三局集团,太原030001

出　　处：《路基工程》2015年第4期189-193,217,共6页Subgrade Engineering

摘　　要：以福州地铁1号线洗马桥改造工程为背景,采用三维数值模拟方法,研究了紧邻桥台开口型基坑支护设计中的水平支撑设置问题。重点分析了水平支撑与桥台相连或不相连的两种方案下,围护结构的水平位移、围护结构的弯矩、水平支撑的轴力以及桥台的水平位移。通过对比,认为穿越桥台对撑方案比桥台直接支撑方案要更为合理,并以此作为实际设计施工方案。工程监测数据所反映的规律与数值模拟结果基本一致,这也佐证了穿越桥台对撑方案的合理性。研究结果可为类似的开口型基坑设计提供参考。Taking the reconstruction project of Ximaqiao on Fuzhou Metrol Line 1 as the background, this paper, by three-dimensional numerical simulation, studied the setting of horizontal support in the bracing design for open type foundation pit adjacent to abutment, wherein in the two cases, i.e. the horizontal support connected or not connected to the abutment, the bracing＇s horizontal displacement and bending moment, the horizontal support＇s axial force and the abutment＇s horizontal displacement, were analyzed. Through comparison, it was considered that through-type buttressed abutment is more rational than direct support scheme so that it was put into practice. The rules reflected by the engineering supervision data agree with the result from the numerical simulation substantially, which proves the rationality of the through-type buttressed abutment. The study result may be taken as the reference to similar design of open type foundation pit.

关 键 词：紧邻桥台 区间隧道 开口型基坑 水平支撑 FLAC3D 

分 类 号：TV551.4[水利工程—水利水电工程]