Field instrumentation and 3-D numerical modeling on two adjacent metro shield tunnels beneath tall buildings

Tao, Lee; Jiang, Y; Li, T; Liu, B

doi:10.1201/9780203883204.ch122

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…Stability of surrounding rock is influenced by many factors, with great uncertainty, presented as randomness and fuzziness. By using reliability method, corresponding problems can be solved [7][8][9]; (4) Site measurement. Due to the complexity of surrounding rock stability control, it is difficult to precisely analyze the deformation convergence of surrounding rock in general theory.…”

Section: Introductionmentioning

confidence: 99%

Monitoring and Reinforcement Technology of Passing Weak and Broken Rock Strata for Tunnel Boring Machine

Liu

Wei

et al. 2012

AMM

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The stability control of surrounding rock is a relatively important problem in tunnel boring machine (TBM) construction. The tunnel convergence deformation value was monitored in field while TBM passing weak and broken section of hydraulic tunnel. The correlation between tunnel convergence and surrounding rock stability is analyzed. The monitoring results show that: the characteristic of weak and broken Strata is closely correlated with some geological conditions, such as fault development, intrusive contact of orthophyre and lamprophyre veins. These supporting measures can well ensure the stability of surrounding rock in weak and broken section, such as sealing the inverted arch by using concrete of C25,reinforcing the inverted arch by steel arch of I10 and anchor construction in the roof. There is great difference between the properties of the weak and broken rocks on both sides, which is the main reason of the large tunnel convergence deformation. The monitoring results can provide reference for similar engineering in the future.

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Section: Introductionmentioning

confidence: 99%

Monitoring and Reinforcement Technology of Passing Weak and Broken Rock Strata for Tunnel Boring Machine

Liu

Wei

et al. 2012

AMM

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“…The study of this construction method mainly includes two aspects. One aspect is settlement calculation [1,2], and there are many methods on the prediction of the ground surface settlement due to the shield tunnel construction, and Peck method is a representative empirical formula.The engineering analogy method and numerical method are two representative methods [3][4][5][6]. The other aspect is segment design and stress analysis [7], the theoretical calculation includes two methods: one is based on the relaxation soil pressure concept and the other is based on stress redistribution concept, corresponding to the soil pressure calculation of load structure method and the strata structure method respectively.…”

Section: Introductionmentioning

confidence: 99%

Field Monitoring of Segments Deformation during Metro-Station Construction Based on Shield Tunneling

Liu

et al. 2012

AMM

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To ensure the influence degree on the environment during constructing metro-station based on shield tunneling is very important in the subway construction. After the shield machine passed the metro-station, the field monitoring of these segments is carried on during getting rid of the segments. The connecting seam opening length of segments, the tunnel convergence and the internal force of the segments’ bolt are estimated. The results show that the opening length of segments of circular connecting seam is larger than that of longitudinal connecting seam, and all the changes of the opening length value is within 1.5 mm. Tunnel convergence change generally contains a gradually becoming smaller and a gradual recovery process, and the tunnel convergence is primarily vertical. Bolt internal force change generally involves stress increasing rapidly, and then decreasing slowly. The field monitoring study will potentially provide the knowledge and reference for similar projects

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Settlement transfer mechanism of CFG piles for strengthening high-speed railway subgrades induced by twin shield tunnelling undercrossing

Wu,

Lin,

et al. 2024

Tunnelling and Underground Space Technology

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Field instrumentation and 3-D numerical modeling on two adjacent metro shield tunnels beneath tall buildings

Cited by 3 publications

References 1 publication

Monitoring and Reinforcement Technology of Passing Weak and Broken Rock Strata for Tunnel Boring Machine

Monitoring and Reinforcement Technology of Passing Weak and Broken Rock Strata for Tunnel Boring Machine

Field Monitoring of Segments Deformation during Metro-Station Construction Based on Shield Tunneling

Settlement transfer mechanism of CFG piles for strengthening high-speed railway subgrades induced by twin shield tunnelling undercrossing

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