Multi-Case Analysis and Prediction Formulas for Deformation of Underlying Tunnels Caused by Foundation Excavation

LYU Linhai; JIANG Mingjie; XIE Zhongming; WANG Binghua; HUANG Zhonghui

doi:10.3724/j.gyjzG23082920

Volume 54 Issue 11

Nov. 2024

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LYU Linhai, JIANG Mingjie, XIE Zhongming, WANG Binghua, HUANG Zhonghui. Multi-Case Analysis and Prediction Formulas for Deformation of Underlying Tunnels Caused by Foundation Excavation[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(11): 24-32. doi: 10.3724/j.gyjzG23082920

Citation:

LYU Linhai, JIANG Mingjie, XIE Zhongming, WANG Binghua, HUANG Zhonghui. Multi-Case Analysis and Prediction Formulas for Deformation of Underlying Tunnels Caused by Foundation Excavation[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(11): 24-32. doi: 10.3724/j.gyjzG23082920

Citation:

LYU Linhai, JIANG Mingjie, XIE Zhongming, WANG Binghua, HUANG Zhonghui. Multi-Case Analysis and Prediction Formulas for Deformation of Underlying Tunnels Caused by Foundation Excavation[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(11): 24-32. doi: 10.3724/j.gyjzG23082920

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Multi-Case Analysis and Prediction Formulas for Deformation of Underlying Tunnels Caused by Foundation Excavation

doi: 10.3724/j.gyjzG23082920

1. College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China;
2. Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education, Guangxi University, Nanning 530004, China;
3. Nanning Rail Transit Construction Co., Ltd., Nanning 530029, China;
4. Nanning Rail Transit Investment Co., Ltd., Nanning 530029, China

Received Date: 2023-08-29
Available Online: 2024-12-05

Abstract

Abstract

Based on the statistics on 32 cases of actual underground engineering projects in China where the foundation was excavated above existing tunnels, according to the composition of site soils, they could be divided into two types of strata: fine-grained soil containing sand and fine-grained soil containing gravel. Sorting and summarizing the relevant information including the plane sizes of excavated areas, the relative position and conventional control measures, etc., the main factors induced the maximum uplift displacement of tunnels were analyzed. On the basis, the prediction formula for the maximum uplift displacement of tunnels caused by deep excavation in the strata of fine-grained soil containing sand and fine-grained soil containing gravel were proposed, which were compared and analyzed with other prediction formula and actual engineering cases for verification. The results indicated that the larger the excavated area A, unloading ratio R and the shape factor of excavated areas α, and the longer the longth of tunnels passing under excavated areas L_t, the larger the maximum uplift displacement of tunnels caused by deep excavation w_max was, but the correlation between a single influencing factor and the maximum uplift displacement of tunnels was not strong. Thus, it was necessary to comprehensively consider the main influencing factors to scientifically predict tunnel deformation caused by foundation excavation. Eventually, αR(lg A+ln L_t) was used as the overall influence factor to characterize the maximum uplift displacement of tunnels induced by deep excavation of foundation, and it was found that wmax showed a good linear relation with αR(lg A+ln L_t).
- engineering case,
- foundation excavation,
- underlying tunnel,
- uplift displacement,
- prediction equation

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References(35)

References

[1]	张书丰, 陆航, 沈晓伟. 大范围覆土严重卸载条件下的盾构隧道保护技术研究[J]. 中国安全生产科学技术, 2017, 13(12): 167-173.
[2]	ZHANG X H, WEI G, JIANG C W. The study for longitudinal deformation of adjacent shield tunnel due to foundation pit excavation with consideration of the retaining structure deformation[J/OL]. Symmetry, 2020, 12(12)[2023-08-29]. https://doi.org/10.3390/sym12122103.
[3]	王振峰, 赵婷, 徐明霞, 等. 深开挖后土体卸荷导致隧道隆起变形的算法[J]. 工业建筑, 2022, 52(3): 53-59 , 104.
[4]	YE S H, ZHAO Z F, WANG D Q. Deformation analysis and safety assessment of existing metro tunnels affected by excavation of a foundation pit[J]. Underground Space, 2021, 6(4): 421-431.
[5]	CHENG X D, HONG T Q, LU Z T, et al. Characterization of underlying twin shield tunnels due to foundation:excavation unloading in soft soils: an experimental and numerical study[J/OL]. Applied Sciences, 2021, 11(22) [2023-08-29]. https://doi.org/10.3390/app112210938.
[6]	李志高, 刘浩, 刘国彬, 等. 基坑开挖引起下卧隧道位移的实测分析[J]. 地下空间与工程学报, 2005(4): 619-623.
[7]	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.
[8]	郭鹏飞, 杨龙才, 周顺华, 等. 基坑开挖引起下卧隧道隆起变形的实测数据分析[J]. 岩土力学, 2016, 37 (增刊2): 613-621.
[9]	刘波, 章定文, 杨文辉, 等. 基于多案例统计的基坑开挖引起的下卧既有隧道隆起量预测算式及其工程应用[J]. 中南大学学报(自然科学版), 2022, 53(4): 1416-1428.
[10]	丁智, 张霄, 梁发云, 等. 软土基坑开挖对邻近既有隧道影响研究及展望[J]. 中国公路学报, 2021, 34(3): 50-70.
[11]	姚宏波, 李冰河, 童磊, 等. 考虑空间效应的软土隧道上方卸荷变形分析[J]. 岩土力学, 2020, 41(7): 2453-2460.
[12]	陈郁.基坑开挖引起下卧隧道隆起的研究分析[D]. 上海: 同济大学, 2005.
[13]	张俊峰, 王建华, 陈锦剑, 等. 跨越运营地铁隧道超大基坑开挖的土体参数反分析[J]. 上海交通大学学报, 2012, 46(1): 42-46 , 52.
[14]	温锁林. 近距离上穿运营地铁隧道的基坑明挖施工控制技术[J]. 岩土工程学报, 2010, 32(增刊2): 451-454.
[15]	黄宏伟, 黄栩, HELMUT S F. 基坑开挖对下卧运营盾构隧道影响的数值模拟研究[J]. 土木工程学报, 2012, 45(3): 182-189.
[16]	张正, 陈卫平, 叶国强. 软土地区风井风口施工对下部既有越江隧道影响的数值分析[J]. 防灾减灾工程学报, 2010, 30(4): 381-386.
[17]	魏纲, 李钢, 苏勤卫. 基坑工程对运营地铁隧道影响的实测分析[J]. 现代隧道技术, 2014, 51(1): 179-185.
[18]	王如路, 刘海. 地铁运营隧道上方深基坑开挖卸载施工的监控[J]. 地下工程与隧道, 2005(1): 22-26, 55 -56.
[19]	刘旻旻. 上海市人民路隧道跨越既有隧道的深基坑施工技术[J]. 施工技术, 2012, 41(1): 75-77.
[20]	李家平. 基坑开挖卸载对下卧地铁隧道影响的数值分析[J]. 地下空间与工程学报, 2009, 5(增刊1): 1345-1348, 1360.
[21]	张滔. 长距离上跨轨道交通区间隧道深基坑的微扰动施工技术[J]. 地下工程与隧道, 2017(1): 26-29, 57.
[22]	谢雄耀, 郁宏杰, 王庆国, 等. 基坑开挖引起下卧既有电力隧道变形的控制技术研究[J]. 岩土工程学报, 2014, 36(1): 88-97.
[23]	杨挺, 王心联, 许琼鹤, 等. 箱形隧道基坑下已建地铁盾构隧道隆起位移的控制分析与设计[J]. 岩土力学, 2005(增刊1): 187-192.
[24]	丁海滨, 郭生根, 徐力, 等. 基坑内抗拔桩长度对下卧既有隧道群的影响[J]. 兰州大学学报(自然科学版), 2018, 54(4): 529-533.
[25]	宗翔. 基坑开挖卸载引起下卧已建隧道的纵向变形研究[J]. 岩土力学, 2016, 37 (增刊2): 571-577, 596.
[26]	刘建文, 施成华, 雷明锋, 等. 基坑开挖对下卧地铁隧道影响的解析计算方法[J]. 中南大学学报(自然科学版), 2019, 50(9): 2215-2225.
[27]	欧雪峰, 张学民, 刘学勤, 等. 基坑开挖与降水引起下卧隧道变形的解析计算方法[J]. 铁道学报, 2019, 41(3): 147-154.
[28]	陈拴, 吴怀娜, 陈仁朋, 等. 上方长距离基坑开挖引起的共线隧道变形研究[J]. 上海交通大学学报, 2021, 55(6): 698-706.
[29]	郭劲睿. 近距离基坑开挖对下卧地铁隧位移影响分析及位移控制措施研究[D]. 广州: 广州大学, 2018.
[30]	丁加亮, 陈江, 余富先, 等. 深圳地铁11号线车公庙综合交通枢纽工程两相邻基坑开挖对下卧运营隧道的影响[J]. 隧道建设, 2015, 35(9): 867-872.
[31]	王定军, 王婉婷, 段罗, 等. 基坑开挖对下卧地铁隧道的施工影响分析[J]. 地下空间与工程学报, 2017, 13 (增刊1): 223-232.
[32]	陈仁朋, 叶跃鸿, 王诚杰, 等. 大型地下通道开挖对下卧地铁隧道上浮影响[J]. 浙江大学学报(工学版), 2017, 51(7): 1269-1277.
[33]	郭鹏飞, 杨龙才, 于正. 上方开挖卸荷作用下地铁隧道的实测数据分析[J]. 华东交通大学学报, 2017, 34(2): 20-28.
[34]	岳云鹏, 刘晓玉, 张龙云, 等. 基坑分块开挖对下卧盾构隧道的变形影响分析[J]. 铁道标准设计, 2020, 64(9): 113-119.
[35]	刘增良. 运营隧道上方基坑施工关键技术研究[D]. 天津: 天津大学, 2012: 43-55.