Influence of Pea-Gravel Layer on Segment Ring Support Performance in Shield TBM Tunnels: A Discrete-Continuous Coupling Simulation and Model Test

Wu, Shengzhi; Xie, Hehan; Zeng, Zhengqiang; Wang, Mingnian; Zhao, Haijun; Liu, Yue

doi:10.1061/jcemd4.coeng-13512

Cited by 2 publications

(1 citation statement)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The formation and station parameters are detailed in Tables 1 and 2. The numerical simulation considered the thickness of the intermediate soil, mechanical parameters, excavation span of the new tunnel, and buried depth of the existing station as single variables to analyze the failure of the intermediate soil and settlement of the existing station under different factors [42]. As shown in Figure 8a, when the thickness of the intermediate soil was larger, the settlement of the existing station was smaller.…”

Section: Computation Modulementioning

confidence: 99%

Relationship between the Intermediate Soil State and Settlement Control Measures during Tunnel Construction Undercrossing the Existing Station

Zhang

et al. 2023

Buildings

Self Cite

View full text Add to dashboard Cite

Settlement control of existing stations has consistently been a key issue in tunnel construction. Intermediate soil has a significant influence on the settlement of the existing station as a connector between the new tunnel and the existing station which should be considered when selecting settlement control measures. To clarify the relationship between the state of the intermediate soil and the settlement and control measures of the existing station, this study investigated 49 new tunnel projects under existing stations and elucidated the relationship between the settlement and the settlement control measures of the existing station and the intermediate soil. The relationship between the failure of the intermediate soil and the settlement of the existing station was further analyzed by numerical simulation. Lastly, a simple mechanical model of intermediate soil failure was constructed to determine the stress state of the intermediate soil in constructing a tunnel under the existing station to guide the formulation of settlement control measures for the existing station. Hence, when the intermediate soil is completely destroyed, active control measures, such as jack or grouting lifting, should be implemented; when the intermediate soil is partially damaged, passive control measures should be undertaken. Thus, this study can provide a reference for settlement control of tunnels under existing stations.

show abstract

Section: Computation Modulementioning

confidence: 99%