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| Comparative Study of Strata Loss and Its Corresponding Ground Settlement Induced by Shield Construction |
| WANG Jian-xiu1, ZOU Bao-ping1, FU Hui-xian1, TIAN Pu-zhuo1, ZHU Yan-fei2 |
| 1.Tongji University, Shanghai 200092, China; 2.Shanghai Tunnel Engineering Company Co. Ltd, Shanghai 200072, China |
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Abstract Research purposes: A large area of soil is disturbed during shield under-passed the building-sensitive region, but it is very easily induced by ground settlement, lead to quicksand, and piping, brings a big challenge to the facestability, operation security, and three-dimensional construction. The current research of ground settlementmainly concentrates on the small shield, and considering different definition about strata loss. How to use thestrata loss to research the relationship of strata loss and ground settlement during shield construction is still one of the most sophisticated problems needed to be solved urgently. This paper, taking a super-large-diameter shield under-passed the building-sensitive region in a complex environment as an example, the corresponding strata loss of ground settlement of 2D and 3D, and its corresponding ground settlement are calculated under the condition of strata loss from conventional to extreme. The relationship among shield construction, strata loss and ground settlement are discussed.
Research conclusions: (1) The maximum ground settlement for every increased 0.1% of strata loss was increased 3-4 mm under the condition of strata loss 5 %. (2) The final settlement for every increased 0.5 % of average strata loss of shield tail was increased 8mm. (3) By the common influence of strata loss of shield head and shield tail, the total final settlement was formed.(4)It is proposed that development of a set of methods for shield control by using ground settlementin dicators of strata loss control rate.(5)This paper provides the valuable reference to the study on the ground settlement , disaster prevention, tunnel design, and construction.
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Received: 29 May 2013
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[1] Ding L, Ma L, Luo H, etc. Wavelet Analysis for Tunneling-Induced Ground Settlement Based on a Stochastic Model [J]. Tunnelling and Underground Space Technology, 2011(26):619-628.
[2]Celestino TB, Gomes R, Bortolucci AA. Errors in Ground Distortions Due to Settlement Trough Adjustment[J]. Tunnelling and Underground Space Technology, 2000(15):97-100.
[3]Karakul M. Appraising the Methods Accounting for 3D Tunnelling Effects in 2D Plane Strain FE Analysis [J]. Tunnelling and Underground Space Technology, 2007(22):47-56.
[4] Juneja, A, Hegde, A, Lee, FH. Centrifuge Modelling of Tunnel Face Reinforcement Using Forepoling[J]. Tunnelling and Underground Space Technology, 2010(4):377-381.
[5] Santos OJ, Celestino TB. Artificial Neural Networks Analysis of Sao Paulo Subway Tunnel Settlement Data[J]. Tunnelling and Underground Space Technology, 2008(23):481-491.
[6] Migliazza M, Chiorboli M, Giani GP. Comparison of Analytical Method, 3D Finite Element Model with Experimental Subsidence Measurements Resulting from the Extension of the Milan Underground[J]. Computers and Geotechnics, 2009(36):113-124.
[7]方勇, 何川.考虑施工过程的土压平衡式盾构隧道掘进数值分析[J], 铁道工程学报, 2009(11):56-60.
Fang Yong, He Chuan. Numerical Analysis of Earth-pressure-balance Shield Driving Considering Basedon Construction Course[J]. Journal of Railway Engineering Society, 2009(11):56-60.
[8]王建秀, 付慧仙, 朱雁飞, 等.基于地层损失的盾构沉降计算方法研究进展[J].地下空间与工程学报,2010(1):112-150.
Wang Jianxiu, FuHuixian, ZhuYanfei, etc. Advancein Calculation of Subsidence Caused by Shield Tunnel Based on Strata Loss[J]. Chinese Journal of Underground Space and Engineering, 2010(1):112-150.
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2013, Vol. 30 
