Soliman Addenbrooke Potts Chehade Shahrour Fig. 1 Plan view for construction site m 2

Size: px

Start display at page:

Download "Soliman Addenbrooke Potts Chehade Shahrour Fig. 1 Plan view for construction site m 2"

摘梅
7 years ago
Views:

1 7 5 Vol Chinese Journal of Underground Space and Engineering Oct * U A Numerical Simulation Analysis on Ground Settlements Caused by Multi-line Shield Tunnel Xiao Xiao 1 Zhang Mengxi 1 Wu Huiming 2 Zhang Zhiguo 1 1. Department of Civil Engineering Shanghai University Shanghai China 2. Shanghai Tunnel Engineering Co. Ltd Shanghai China Abstract Considering the complex four line overlapped form which lies in the subway No. 11 shield tunnel interval from Xu Jia-hui station to Shanghai indoor stadium 3-D finite element method is used to simulate the excavation process. Using some methods such as model change and reduplicated elements to simulate the soil excavation shield thrusting segment assembles and grouting hardening to analyse the strata deformation caused by tunnel shield construction. Then the ground settlement caused by multiline overlapped shield construction passing through the area with existed tunnel is analysed. It can be concluded that the maximum ground settlement will be affected by the position of shield machine when two tunnels construction have been completed the location of maximum value of ground settlement will be changed compared with that by one tunnel construction. The research results could be helpful to the regional protection technology of multi-line overlapped shield tunnel construction and served as theoretical basis. Keywords tunneling engineering shield tunneling multi-line overlapped type ground settlement three-dimensional finite element method 1 * xiaoxiao8808@ 163. com

2 Soliman Addenbrooke Potts Chehade Shahrour Fig. 1 Plan view for construction site m m 965 m m 2 M4 1 M2 9 ~ 11 2 Fig. 2 Section of the position relationship for tunnels

3 Fig. 1 Soil parameters γ kn /m 3 E s MPa μ c kpa φ a z 120 m 8 y 144 m x 95 m 5 Fig Schematic diagram of folium elements 10-4 m 3 5 Fig. 3 Grid figure of the whole model Fig. 5 Schematic diagram of simulation steps

4 Fig. 8 Transverse settlements due to tunneling for the upline ring No Fig. 6 Schematic diagram of the selected position on the transverse ground mm mm mm mm mm m mm 7 Fig mm Transverse settlements due to tunneling for the up-line ring No mm mm mm 2 9 Fig Fig mm Transverse settlements due to tunneling for the down-line ring No Transverse ground settlements due to tunneling for the down-line ring No

5 mm 0. 5 mm Fig. 13 Longitudinal settlements due to tunneling for the Fig. 11 Schematic diagram of the selected position up-line ring No on the longitudinal ground mm mm m x y Fig Fig. 12 Longitudinal settlements due to tunneling for the up-line ring No mm mm mm mm Schematic diagram of the longitudinal monitoring points 1 070

6 Table 2 Comparison between monitoring results and J simulation results for the down-line construction finished Zhang Haibo Yin Zongze Zhu mm mm Jungao. Numerical simulation of influence of new tunnel on short distance overlapped old tunnel during shield tunneling J. Rock and Soil Mechanics in Chinese Chehade F H Shahrour I. Numerical analysis of the interaction between twin-tunnels influence of the relative position and construction procedure J. Tunneling and Underground Space Technology J Wang Weiming Lu Linhai. Numerical analysis of excavation process of the overlapping Tunnels at Taidong Station of Qingdao City J. Chinese Journal of Un- derground Space and Engineering in Chinese 7. 1 J Tao Lianjin Sun Bin Li Xiaolin. Interaction analysis of double holes extremely close approaching parallel shield tunnels construction J. Chinese Journal of Rock Mechanics and Engineering in Chinese 2 8. J Hu Qunfang Huang Hongwei. Analysis and monitoring on shield tunneling under existing adjacent tunnel J. Chinese Journal of Geotechnical Engineering in Chinese 3 9. J Sun Yang Shen Shuilong Guan Zhanwei. Three-dimensional finite element analysis on reinforcement of entrance and exit for References 1 Soliman E Duddeek H Ahrens H. Two and three-dimensional analysis of closely spaced double-tube tunnels J. Tunneling and Underground Space Technology Addenbrooke T I Potts D M. Twin tunnel interaction surface and subsurface effects J. International Journal of Geomechanics in Chinese J Sun Jun Liu Hongzhou. 3-D numerical simula J Chen Yu tion of ground surface settlement under overlapped Zhu Jiwen. Coupled fluid-mechanical analysis of Dot Shield Tunneling J. Journal of Tongji University in Chinese shield by horizontal jet grouting J. Chinese Journal of Underground Space and Engineerjing in Chinese 10. J Jiang Mingjing Wang Fuzhou Zhu Hehua. Numerical Simulation on earth pressure for shield tunnels incorporating tail gaps by DEM J. Chinese Journal of Underground Space and Engineerjing. shield tunnel J. Chinese Journal of Underground Space and Engineerjing in Chinese

#4 ~ #5 12 m m m 1. 5 m # m mm m Z4 Z5

#4 ~ #5 12 m m m 1. 5 m # m mm m Z4 Z5 2011 6 6 153 JOURNAL OF RAILWAY ENGINEERING SOCIETY Jun 2011 NO. 6 Ser. 153 1006-2106 2011 06-0014 - 07 300142 ABAQUS 4. 287 mm 6. 651 mm U455. 43 A Analysis of Impact of Shield Tunneling on Displacement