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JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)  2019, Vol. 53 Issue (1): 61-68    DOI: 10.3785/j.issn.1008-973X.2019.01.007
Civil Engineering     
Prediction and analysis of surface deformation caused by twin shield construction in soft soil
DING Zhi, WANG Fan-yong, WEI Xin-jiang
Department of Civil Engineering, Zhejiang University City College, Hangzhou 310015, China
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Abstract  

A field test for twin shield construction in soft soil was conducted based on the project of Hangzhou Metro Line 2. The changing law of surface deformation and the applicability of twin peck formula in soft soil were analyzed based on the analysis of field measured data. The value of soil loss rate was analyzed. Results show that the sedimentation of the twin shield tunneling in the soft soil area is larger than the other soil. There is a positive correlation between the surface deformation and the ratio of the single ring excavated soil to the pressure of grouting. The loss rate of soil and the single ring excavated soil satisfies Boltzmann distribution. The loss rate is distributed in a limited interval, and increases with the increase of the amount of the single ring excavated soil.



Received: 18 March 2018      Published: 07 January 2019
CLC:  U459  
Cite this article:

DING Zhi, WANG Fan-yong, WEI Xin-jiang. Prediction and analysis of surface deformation caused by twin shield construction in soft soil. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2019, 53(1): 61-68.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2019.01.007     OR     http://www.zjujournals.com/eng/Y2019/V53/I1/61


软土双线盾构施工地表变形实测分析与预测

依托杭州地铁2号线某盾构区间段工程,对软土区双线盾构施工引起的地表变形进行现场实测,分析地表变形的规律及双线Peck公式在软土地区的适用性,研究土体损失率的取值. 分析结果表明:软土地区双线盾构掘进引起的沉降绝对值较大且二次扰动效应明显强于其他土质;单环排土量与盾尾注浆压力的比值与地表最终沉降之间呈现较好的正相关性;土体损失率与单环排土量之间满足玻尔兹曼分布规律,即在盾构正常施工的情况下,土体损失率分布在一个有限区间内,随着单环排土量的增加而增大.

[1] 魏纲, 张鑫海, 华鑫欣. 考虑多因素的双线水平平行盾构施工引起地表隆陷研究[J]. 防灾减灾工程学报, 2017, 37(6):923-930 WEI Gang, ZHANG Xin-hai, HUA Xin-xin. Research on surface heave and subsidence caused by multi-factor in double-line shield tunnels construction[J]. Journal of Disaster Prevention and Reduction Engineering, 2017, 37(6):923-930
[2] 邱明明, 杨果林, 吴镇清, 等. 双孔平行地铁隧道盾构施工地表沉降分布规律研究[J]. 现代隧道技术, 2017, 54(2):96-105 QIU Ming-ming, YANG Guo-lin, WU Zhen-qing, et al. Distribution laws of surface settlement induced by shield construction of twin-tube metro tunnels[J]. Modern Tunnelling Technology, 2017, 54(2):96-105
[3] PECK R B. Deep excavations and tunneling in softground[C]//Proceedings of the 7th International Conference on Soil Mechanics and Foundation Engineering. Mexico City:[s. n.], 1969:225-290.
[4] SAGASETA C. Analysis of undrained soil deformation due to ground loss[J]. Geotechnique, 1987, 37(3):301-320.
[5] 李忠超, 陈仁朋, 孟凡衍, 等. 软黏土中盾构掘进地层变形与掘进参数关系[J]. 浙江大学学报:工学版, 2015, 49(7):1268-1275 LI Zhong-chao, CHEN Ren-peng, MENG Fan-yan, et al. Tunnel boring machine tunneling-induced ground settlements in soft clay and influence of excavation parameters[J]. Journal of Zhejiang University:Engineering Science, 2015, 49(7):1268-1275
[6] 陈春来, 赵城丽, 魏纲, 等. 基于Peck公式的双线盾构引起的土体沉降预测[J]. 岩土力学, 2014, 35(8):2212-2218 CHEN Chun-lai, ZHAO Cheng-li, WEI Gang, et al. Prediction of soil settlement induced by double-line shield tunnel based on Peck formula[J]. Rock and Soil Mechanics, 2014, 35(8):2212-2218
[7] WEI Gang. Prediction of soil settlement caused bydouble-line parallel shield tunnel construction[J]. Disaster Advances, 2013, 6(6):23-27.
[8] 胡斌, 刘永林, 唐辉明, 等. 武汉地铁虎泉-名都区间隧道开挖引起的地表沉降研究[J]. 岩石力学与工程学报, 2012, 31(5):908-913 HU Bin, LIU Yong-lin, TANG Hui-ming, et al. Researchon ground subsidence due to tunnel excavation inHuquan-Mingdu section of Wuhan subway[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(5):908-913
[9] CHEHADE F H, SHAHROUR I. Numerical analysis of the interaction between twin-tunnels:influence of the relative position and construction procedure[J]. Tunnelling and Underground Space Technology, 2008, 23(2):210-214.
[10] NGOC A D, DANIEL D, PIERPAOLO O. Three-dimensional numerical simulation of mechanized twin stacked tunnels in soft ground[J]. Journal of Zhejiang University:Science A, 2014, 15(11):896-913.
[11] 孙兵, 仇文革. 双孔盾构隧道地表位移离心机模型试验研究[J]. 铁道建筑, 2010(2):38-41 SUN Bing, QIU Wen-ge. Study on surface displacementinduced by parallel twin shield tunnel with centrifuge model test[J]. Railway Engineering, 2010(2):38-41
[12] NEW B M, BOWERS K H. Ground movement model validation at the heathrow express trial tunnel[J]. Tunnelling, 1994(3):301-329.
[13] 刘波, 陶龙光, 丁城刚, 等. 地铁双隧道施工诱发地表沉降预测研究与应用[J]. 中国矿业大学学报, 2006, 35(3):356-361 LIU Bo, TAO Long-guang, DING Cheng-gang, et al. Predictionfor ground subsidence induced by subway double tube tunneling[J]. Journal of China University of Mining and Technology, 2006, 35(3):356-361
[14] SUWANSAWAT S, EINSTEIN H H. Describing settlement troughs over twin tunnels using a superposition technique[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2007, 133(4):445-468.
[15] 白海卫, 宋守信, 王剑晨. Peck公式在双线盾构隧道施工地层变形中的适应性分析[J]. 北京交通大学学报, 2015, 39(3):30-34 BAI Hai-wei, SONG Shou-xin, WANG Jian-chen. An adaptability study of Peck formula applied to predicting ground settlements induced by double shield tunneling[J]. Journal of Beijing Jiaotong University, 2015, 39(3):30-34
[16] 赵华松, 周文波, 刘涛, 等. 双线平行盾构施工引起的土体位移分析及其软件开发[J]. 上海大学学报:自然科学版, 2015, 11(4):416-422 ZHAO Hua-song, ZHOU Wen-bo, LIU Tao, et al. Numerical simulation and software development of soil displacement due ti double-tube parallel tunnels[J]. Journal of Shanghai University:Natural Science, 2015, 11(4):416-422
[17] GIMA V M, BARRY M L. Numerical back-analyses of greenfield settlement during tunnel boring[J]. Canadian Geotechnical Journal, 2013, 50(2):145-152.
[18] 张恒, 陈寿根, 邓稀肥. 盾构掘进参数对地表沉降的影响分析[J]. 现代隧道技术, 2010, 47(5):48-53 ZHANG Heng, CHEN Shou-gen, DENG Xi-fei. Analysis of the influence of shield driving parameters on ground settlements[J]. Modern Tunneling Technology, 2010, 47(5):48-53
[19] 魏新江, 周洋, 魏纲. 土压平衡盾构掘进参数关系及其对地层位移影响的试验研究[J]. 岩土力学, 2013, 34(3):59-65 WEI Xin-jiang, ZHOU Yang, WEI Gang. Research of EPB shield tunneling parameter relations and their influence on stratum displacement[J]. Rock and Soil Mechanics, 2013, 34(3):59-65
[20] 魏纲. 盾构法隧道地面沉降槽宽度系数取值的研究[J]. 工业建筑, 2009, 39(12):74-79 WEI Gang. Study on calculating for width parameter of surface settlement trough induced by shield tunnel[J]. Industrial Construction, 2009, 39(12):74-79
[21] O'REILLY M P, NEW B M. Settlements above tunnels in the United Kingdom-their magnitude and prediction[C]//Proceedings of Tunnelling'82. London:Institution of Mining and Metallurgy, 1982:173-181.
[22] ATTEWELL P B. Ground movements caused by tunnelling in soil[C]//Conference on Large Ground Movements and Structures. London:Pentech Press, 1978:812-948.
[23] MAIR R J. Settlement effects of bored tunnels[C]//Proceedings of International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground. London:Balkema, 1996:43-53.

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