Shaking table test and numerical simulation for acceleration response laws of shallow-buried biased double-arch tunnel

Liu, Chan; Yang, Hui; Jiang, Xueliang; Shi, Hongtao

doi:10.21595/jve.2019.20623

Cited by 11 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Daraei [19] uses a practical multi-graph to determine the sequential excavation method of the tunnels, which can provide an effective tool for selecting the sequential excavation method (SEM) and predicting the ground behavior in the primary phase of designing tunnels and also during excavation. Meanwhile, during the construction process, continuous excavation and support operations lead to constantly changing the boundary conditions of the rock mass, which results in highly complex mechanical responses of the surrounding rock [20][21][22][23][24][25][26]. Such features have drawn many scholars' close attention.…”

Section: Introductionmentioning

confidence: 99%

Optimizing the Support System of a Shallow Buried Tunnel under Unsymmetrical Pressure

Liu,

et al. 2024

Buildings

View full text Add to dashboard Cite

In the construction process of tunnel inlet sections, the rock mass can sustain unsymmetrical pressure due to asymmetrical terrain on the two sides of the tunnel. The fact that the inlet sections are usually under shallow buried conditions with strongly weathered rock mass exacerbates the issue. This paper discusses optimization strategies of the initial support of a shallow buried tunnel based on the analytical results of asymmetrical loading characteristics. Numerical simulation is performed with particle flow code (PFC) using the Jianshanji tunnel project as an example. The simulation results show that the bench excavation has slightly less total deformation than the full-section excavation but the deformation range is wider, especially in the tunnel arch. Both lining support and slope reduction treatments can effectively improve rock deformation, with lining support demonstrating better performance in controlling deformation and adjusting stress distribution. Based on the simulation results, the bench excavation and lining support are used in the actual project, and the corresponding optimization control measures were adopted to address deformation issues, including crushed-stone backfilling for compression resistance, advanced grouting reinforcement, and grouting. The field data show that the tunnel stability is effectively improved by adopting the optimization schemes, which further validates the effectiveness of the proposed unsymmetrical control method.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimizing the Support System of a Shallow Buried Tunnel under Unsymmetrical Pressure

Liu,

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

“…The fast Lagrandian analysis of continua in 3 dimensions (FLAC 3D) numerical model (Yang et al, 2013;Xiao et al, 2014;Xiao et al, 2016;Yang et al, 2020) and model tests (He et al, 2015;Lei et al, 2016) were employed to explore the cracking behaviors and mechanisms of shallow bias tunnels. Furthermore, shaking table model tests were conducted to explore the dynamic responses, damage mechanisms, and failure modes of shallow-buried bias tunnels subjected to dynamic loads (Xu et al, 2016;Wang et al, 2017;Jiang et al, 2018;Wang et al, 2018;Liu et al, 2019;Sun et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Mechanical behaviors of surrounding rock and supporting structure of shallow-buried unsymmetrical pressure tunnel crossing soil–rock interface

Zhang

Wang

et al. 2023

Front. Earth Sci.

View full text Add to dashboard Cite

Shallow bias tunnels are sensitive at the entrance section, where the existence of soil–rock interface (SRI) results in more complex deformation of surrounding rock and supporting structure. This study investigates the mechanical properties of surrounding rock and supporting structure of a shallow-buried bias tunnel crossing the soil–rock interface by a combination of model tests and numerical simulations. A shallow-buried biased tunnel with significant cracking at its entrance section is selected in southwest China. The plastic zone distribution, deformation, and pressure of surrounding rock, as well as the stress and deformation of supporting structure, are analyzed under different conditions with the tunnel vault, arch haunch, arch spring, and wall foot crossing the soil–rock interface. The test and numerical results show that the internal force of the lining structure is the largest at the left arch haunch and the right arch spring, with cracks occurring in the project. The surrounding rock and supporting structure are most prominently influenced by the arch haunch and arch spring crossing the soil–rock interface among different positions of the tunnel. The supporting structure is subjected to stress in three modes: there is mainly shearing when the tunnel vault passes through the soil–rock interface, extrusion and shearing co-exist when the tunnel arch haunch and arch spring pass through the soil–rock interface, and extrusion is dominant when the tunnel wall foot passes through the soil–rock interface. Inserting grouting steel pipes perpendicular to the soil–rock interface on the deep-buried side of the tunnel can effectively control the deformation of surrounding rock and the stress of supporting structure.

show abstract

“…In terms of physical model test, Li et al [12] and Yang et al [13] conducted an in-depth study on the excavation method of cross diaphragm method for the double-arch tunnel through physical model test and numerical simulation. Using shaking table tests, Liu et al [14] studied the acceleration response of a shallow-buried offset double-arch tunnel under Wenchuan wave, and discussed the influence of unbiased and offset on the acceleration response of a shallow-buried offset double-arch tunnel. Taking a double-arch tunnel of the Yuanmo Expressway in Yunnan Province as the engineering background, Liu et al [15] conducted indoor model tests of a double-arch tunnel based on the principle of elastic phase similarity, simulated the construction conditions of the doublearch tunnel and studied the stress and displacement distribution of tunnel surrounding rock during construction.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Ultra-Shallow Buried Large-Span Double-Arch Tunnel Excavated under an Expressway

Wang

Cao

et al. 2021

Applied Sciences

View full text Add to dashboard Cite

The temporal and spatial effects of a complicated excavation process are vital for an ultra-shallow buried large-span double-arch tunnel excavated under an expressway in service. Numerical simulations are urgent and necessary to understand the effect of the total construction process. Taking Xiamen Haicang tunnel as a research object, the total excavation process of three pilot tunnels and the three-bench reserved core soil method of an ultra-shallow buried large-span double-arch tunnel with a fault fracture zone under an expressway was simulated using software FLAC3D. The deformation of the surface, surrounding rock, underground pipelines, tunnel support structure and partition wall of the three pilot tunnels and the main tunnel was analyzed, and the dangerous areas and time nodes were obtained. When the tunnel was excavated to the fault fracture zone, the deformation of the surface and surrounding rock increased significantly. The rock and soil within 20 m behind the excavation surface of the pilot tunnel were greatly disturbed by the excavation. During the excavation of the main tunnel, the horizontal displacement of the middle partition wall moved slightly towards the main tunnel excavated first. The research results can provide a reference for the construction design of double-arch tunnels.

show abstract

Shaking table test and numerical simulation for acceleration response laws of shallow-buried biased double-arch tunnel

Cited by 11 publications

References 8 publications

Optimizing the Support System of a Shallow Buried Tunnel under Unsymmetrical Pressure

Optimizing the Support System of a Shallow Buried Tunnel under Unsymmetrical Pressure

Mechanical behaviors of surrounding rock and supporting structure of shallow-buried unsymmetrical pressure tunnel crossing soil–rock interface

Numerical Simulation of Ultra-Shallow Buried Large-Span Double-Arch Tunnel Excavated under an Expressway

Contact Info

Product

Resources

About