邻近基坑开挖顺序对既有隧道的变形影响分析
PDF下载 (216)朱国权,陆 幸,司壹恒,叶俊能.邻近基坑开挖顺序对既有隧道的变形影响分析[J].宁波大学学报(理工版),2021,34(5):89-94.DOI:
ZHU Guoquan,LU Xing,SI Yiheng,YE Junneng.The influence of construction sequence of adjacent foundation pit on the deformation of existing tunnel[J].Journal of Ningbo University(Natural Science & Engineering Edition),2021,34(5):89-94.DOI:
| Title: | The influence of construction sequence of adjacent foundation pit on the deformation of existing tunnel |
| 作者: | 朱国权, 陆 幸, 司壹恒, 叶俊能 |
| Author(s): | ZHU Guoquan, LU Xing, SI Yiheng, YE Junneng |
| 关键词: | 基坑开挖; 隧道保护; 现场试验; 隔离桩 |
| Keywords: | PLAXIS; excavation; tunnel protection; field test; isolation pile |
| 分类号: | U452 |
| 文献标识码: | A |
| 摘要: | 以邻近轨道交通2号线鼓外区间隧道的宁波绿地中心项目基坑为案例, 研究了基坑开挖对隧道水平位移、结构沉降、道床沉降的影响规律, 并利用PLAXIS程序分析了基坑分坑、分块开挖顺序对隧道变形的影响. 结果表明: 对隧道变形影响较大的是基坑与隧道之间的距离以及基坑分坑面积的大小, 两者呈线性关系; 开挖面积越大, 隧道变形越大; 基坑与隧道之间的距离越大, 变形越小. 邻近轨道交通的基坑开挖时, 应先远坑后近坑, 先小坑后大坑, 并采取跳挖的施工顺序. 具体研究成果可以为类似工程提供借鉴. |
| Abstract: | Based on the foundation pit of Ningbo Greenland Center Project, which is adjacent to the Guwai interval tunnel of Rail Transit Line 2, the influence of foundation pit excavation on the horizontal displacement, structural settlement and roadbed settlement of the tunnel are studied in this paper. The PLAXIS program is employed to analyze the influence of the excavation sequence of foundation pit and block excavation on the deformation of the tunnel. The results show that the distance between the foundation pit and the tunnel and the area of the foundation pit are the most important factors affecting the deformation of the tunnel. There is a linear relationship between the two. The larger the excavation area is, the larger the tunnel deformation is. The greater the distance between the foundation pit and the tunnel, the smaller the deformation. Hence the construction sequence of the adjacent foundation pits should be arranged from far away to near, from small to big, and better adopting jump interval excavation. The results of this paper can be used as a reference for similar projects. |
| 参考文献 /References: | [1] Osman A S, Bolton M D. Ground movement predictions for braced excavations in undrained clay[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2006, 132(4):465-477. [2] 基坑工程手册编辑委员会. 基坑工程手册[M]. 北京: 中国建筑工业出版社, 2009. [3] Sharma J S, Hefny A M, Zhao J, et al. Effect of large excavation on deformation of adjacent MRT tunnels[J]. Tunnelling and Underground Space Technology, 2001, 16(2):93-98. [4] 况龙川, 李智敏, 殷宗泽. 地下工程施工影响地铁隧道的实测分析[J]. 清华大学学报(自然科学版), 2000(S1): 79-82. [5] 陈郁, 张冬梅. 基坑开挖对下卧隧道隆起的实测影响分析[C]. 全国城市地下空间学术交流会, 上海, 2004. [6] 孔令荣, 崔永高, 隋海波. 基坑开挖对邻近地铁变形的影响分析[J]. 工程勘察, 2010, 38(6):15-20. [7] 邵华, 王蓉. 基坑开挖施工对邻近地铁影响的实测分析[J]. 地下空间与工程学报, 2011, 7(S1):1403-1408. [8] 伍尚勇, 杨小平, 刘庭金. 双侧深基坑施工对紧邻地铁隧道变形影响的分析[J]. 岩石力学与工程学报, 2012, 31(S1):3452-3458. [9] 左殿军, 史林, 李铭铭, 等. 深基坑开挖对邻近地铁隧道影响数值计算分析[J]. 岩土工程学报, 2014, 36(S2):391-395. [10] 刘方梅. 深基坑开挖对邻近地铁隧道的影响[D]. 杭州: 浙江大学, 2015. [11] 王罡. 基坑开挖施工对邻近运营地铁隧道变形影响分析[J]. 施工技术, 2016, 45(20):86-90. [12] 郑刚, 杜一鸣, 刁钰, 等. 基坑开挖引起邻近既有隧道变形的影响区研究[J]. 岩土工程学报, 2016, 38(4):599-612. [13] 杜一鸣. 基坑开挖对邻近既有隧道变形影响及保护研究[D]. 天津: 天津大学, 2017. [14] 魏少伟. 基坑开挖对坑底已建隧道影响的数值与离心试验研究[D]. 天津: 天津大学, 2010. [15] 王强. 敏感环境下深大基坑开挖实测分析及数值模拟[J]. 土木工程学报, 2011, 44(S2):98-101. [16] 林杭, 陈靖宇, 郭春, 等. 基坑开挖对邻近既有隧道变形影响范围的数值分析[J]. 中南大学学报(自然科学版), 2015, 46(11):4240-4247. |
| 备注/Memo: | 收稿日期: 2021－07－01. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 宁波市科技计划公益项目（202002N3116 ）. 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/第一作者: 朱国权（1971－）, 男, 浙江慈溪人, 高级工程师, 主要研究方向: 岩土工程勘察设计. E-mail: 376966214@qq.com |
