基坑开挖对侧向运营地铁隧道变形的影响分析
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摘要
根据上海软土地区的20个案例,分析总结了隧道变形的一般规律。重点分析了影响隧道隆起和沉降的影响因素,并得出各影响因素与隧道竖向位移的关系;在此基础上对隧道隆起和沉降最大值进行了预测。预测结果显示隧道隆起和沉降与基坑开挖深度、隧道顶覆土厚度、基坑开挖面积等参数密切相关,实测值基本符合线性函数。
Based on the total 20 cases,this paper summarizes the basic rule of shield tunnels deformation. The main concern analyzes the influence factors of tunnels heave and settlement,and conclude the relationship between influence factors and the vertical displacement of tunnels. At last,it predicts the maximum heave and settlement of shield tunnels. The results reveals that tunnels heave and settlement have close relationship between excavation depth,tunnels buried depth,excavation area etc. The measured value is accord with linear function.
Based on the total 20 cases,this paper summarizes the basic rule of shield tunnels deformation. The main concern analyzes the influence factors of tunnels heave and settlement,and conclude the relationship between influence factors and the vertical displacement of tunnels. At last,it predicts the maximum heave and settlement of shield tunnels. The results reveals that tunnels heave and settlement have close relationship between excavation depth,tunnels buried depth,excavation area etc. The measured value is accord with linear function.
引文
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[5]梁发云,褚峰,宋著.紧邻地铁枢纽深基坑变形特性离心模型试验研究[J].岩土力学,2012,33(3):657-664.
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[9]张强.开挖卸荷下既有地铁隧道的竖向变形及其控制研究[D].北京:北京交通大学,2012.
[2]魏纲.基坑开挖对下方既有盾构隧道影响的实测与分析[J].岩土力学,2013,34(5):1421-1428.
[3]魏纲,蔡吕路,赵城丽.基坑开挖对旁边盾构隧道影响研究综述[J].低温建筑技术,2014,2(18):124-127.
[4]高广运,高盟,杨成斌,等.基坑施工对运营地铁隧道的变形影响及控制研究[J].岩土工程学报,2010,32(3):453-458.
[5]梁发云,褚峰,宋著.紧邻地铁枢纽深基坑变形特性离心模型试验研究[J].岩土力学,2012,33(3):657-664.
[6]建筑基坑工程技术规程:DBJ/T15—20—2016[S].
[7]基坑工程技术规范:DGTJ08—61—2010[S].
[8]张俊峰.软土地区基坑对下卧隧道变形的影响与控制研究[D].上海:上海交通大学,2013.
[9]张强.开挖卸荷下既有地铁隧道的竖向变形及其控制研究[D].北京:北京交通大学,2012.