摘要
目前软土地区地铁车站深基坑多采用地下连续墙作为围护结构,通过对上海轨道交通10号线同济大学站基坑地下连续墙现场监测结果的分析,研究了基坑开挖深度与地下连续墙侧移及最大相对侧移的关系,同时给出了地下连续墙最大侧移及最大侧移位置随开挖时间的变化规律,并对不同测点的侧移结果进行分析比较。结果表明:长条形地铁车站深基坑虽然是对称结构,但是对基坑外侧土体进行加固一侧的地下连续墙的变形远远小于未经加固一侧的变形,所以,在对基坑设计时一定要考虑土体加固的影响。
Diaphragm wall is often used as retaining structure for deep excavation of subway station in soft soil at present. Diaphragm wall deflection of Tongji subway station of Shanghai metro line No. 10 is studied. By the analysis of the results from observing the wall deflection, the relationships between wall deflection, maximum relative wall deflection and excavation depth are researched, and the varieties of maximum wall deflection and locations of maximum wall deflection along with excavation time are also analyzed. Wall deflections of different places are compared. The observed results show that the deflection of wall at the side with soil reinforced is much smaller than the other side with no soil reinforced although the excavation is symmetrical, so the effect of reinforced soil must be considered when we design an excavation.
出处
《低温建筑技术》
2009年第6期81-83,共3页
Low Temperature Architecture Technology
