Study on Antiseismic Effect of Different Thicknesses of Shock Absorption Layer on Urban Shallow Buried Double Arch Rectangular Tunnel

Wang, Jian; Hu, Yulong; Fu, Bo; Shan, Hongwei; Wei, Hanghang; Cui, Guangyao

doi:10.1155/2022/4863756

Cited by 3 publications

(3 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The seismic considerations for tunnel construction can be generally divided into three categories [21][22][23][24]. In general, the first category is to set a shock protective layer between the tunnel lining and the surrounding soils [25][26][27][28]. The second category is to optimize the damping performance of the tunnel.…”

Section: Case Of Earthquake Damage Time Locations Resultsmentioning

confidence: 99%

Preliminary Mechanical Evaluation of Grouting Concrete as a Protective Layer for Tunnelling

Wan

Huang³

et al. 2023

Materials

View full text Add to dashboard Cite

The aim of this study is to introduce a protective layer to safeguard tunnel structures. In practice, one viable approach to create this protective layer between the tunnel structure and surrounding rocks is to pump the material during tunnel construction. The primary components of the proposed material are porous sand, rubber, and cement. Static and dynamic experiments were conducted to assess the unconfined compressive strength (UCS), flexural stiffness, and compaction resistance at various mixing ratios. The results indicate that the addition of porous sand decreases the UCS compared to the solid sand under similar mixing conditions. The addition of rubber offers the elasticity, thereby enhancing the compaction resistance. However, increasing the rubber content compromises UCS. Furthermore, this study presents a linear equation to predict the 7-day UCS, which can be used as a rapid estimation for UCS, flexural stiffness, and compaction resistance of the proposed material. It is important to note that this study only investigates the fundamental mechanical properties of the proposed material, and further comprehensive research is necessary to fully understand its workability, durability, and other behaviour before practical application.

show abstract

Section: Case Of Earthquake Damage Time Locations Resultsmentioning

confidence: 99%

Preliminary Mechanical Evaluation of Grouting Concrete as a Protective Layer for Tunnelling

Wan

Huang³

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…An et al [16], in 2021, established an ABAQUS finite element model to clarify the influence of fiber-reinforced concrete lining structure on the seismic performance of an urban shallow-buried rectangular tunnel. Additionally, Jian et al [17], in 2022,applied the finite element method to examine the influence of the thickness of a shock absorption layer on the seismic effect of an urban shallow-buried double-arch rectangular tunnel. Moreover, Liu et al [18], in 2022, employed full dynamic time history analysis to investigate the interaction in the transversal direction of an arched tunnel buried in a stratified soil in Hohhot, China.…”

Section: Introductionmentioning

confidence: 99%

Shaking Table Testing and Numerical Study on Aseismic Measures of Twin-Tube Tunnel Crossing Fault Zone with Extra-Large Section

Zhao,

Liang,

Zhao

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

As transportation networks continue to expand into mountainous regions with high seismic activity, ensuring the seismic safety of tunnels crossing active faults has become increasingly crucial. This study aimed to enhance our understanding of the impact of fault zones on the seismic behavior of tunnels and to provide optimized seismic design recommendations through a comprehensive experimental and numerical investigation. The focus of this research is the Xiangyangshan Highway Tunnel in China, which intersects a significant longitudinal fault. Large-scale shake table tests were performed on 1:100 scale physical models of the tunnel to analyze the seismic responses under various ground motion excitations. Detailed three-dimensional finite difference models were developed in FLAC3D and calibrated based on the shake table results. The tests indicated that strains, earth pressures, and accelerations experience localized amplification within 10–20 m of the fault interface compared to undisturbed ground sections. Common seismic mitigation measures, such as rock grouting, seismic joints, and shock absorption layers, were observed to effectively reduce the amplified seismic demands. Grouting, in particular, led to an average reduction of up to 56.3% in circumferential strain and 38.5% in earth pressure. It was concluded that 6 m thick grouted zones and 20 cm thick rubber interlayers between tunnel lining shells provide optimal structural reinforcement against the effects of fault zones. This study provides valuable insights for improving the seismic resilience of underground transportation corridors in seismically active regions.

show abstract

“…On the other hand, due to the presence of underground structures, which change the nearby surface site conditions, seismic waves produce an ampli cation e ect during transmission, thus a ecting the seismic response of adjacent structures underground and at the surface. Numerical simulations and experimental studies have been carried out by a large number of scholars on the causes of seismic damage in tunnels and their in uencing [4][5][6]. Wang and Cai [7] explored the dynamic response law of tunnels at di erent wavelength ratios by the spectral element method, and the results indicated that the velocity amplification is proportional to the tunnel diameter, and tunnels with larger diameters are more prone to damage under seismic action.…”

Section: Introductionmentioning

confidence: 99%

Study on Response and Influencing Factors of Shield Single/Twin Tunnel under Seismic Loading using FLAC 3D

Chen

Huang

et al. 2022

Shock and Vibration

View full text Add to dashboard Cite

The research on the dynamic response and influencing factors of shield tunnel lining under earthquake demonstrates significant engineering value in guiding the design of antiseismic tunnels. In this paper, a nonlinear finite element model of soil-tunnel interaction is established based on FLAC finite difference software, and then Mohr–Coulomb elastoplastic model and dynamic plastic damage model are used to simulate the dynamic characteristics of soil and lining damage of tunnel, and the seismic waves of South Iceland are selected to analyze the residual internal force, dynamic internal force distribution, and the relative deformation of the top and bottom of the arch of the shield tunnel under the earthquake load. Meanwhile, the effects of depth tunnel, lining thickness, and tunnel diameter on the dynamic response of the tunnel are discussed. In addition, the interaction law of horizontal parallel tunnel and the amplification effect on the surface acceleration are also studied. The results show that under the action of a strong earthquake, the bearing capacity of the tunnel decreases sharply, the lining is destroyed, and a large residual internal force appears. When the buried depth of the tunnel is small, the nonlinear effect is more significant, and the R value increases at first and then decreases with the increase in the seismic acceleration. The maximum dynamic bending moment and maximum dynamic axial force of the tunnel lining aggrandize obviously with the increase in tunnel diameter and lining thickness. In particular, the dynamic bending moment has internal force redistribution and deflection under the condition of large tunnel diameter and small lining thickness. Moreover, the interaction of parallel tunnels affects the distribution of internal force and the magnitude of adjacent surface acceleration.

show abstract

Study on Antiseismic Effect of Different Thicknesses of Shock Absorption Layer on Urban Shallow Buried Double Arch Rectangular Tunnel

Cited by 3 publications

References 16 publications

Preliminary Mechanical Evaluation of Grouting Concrete as a Protective Layer for Tunnelling

Preliminary Mechanical Evaluation of Grouting Concrete as a Protective Layer for Tunnelling

Shaking Table Testing and Numerical Study on Aseismic Measures of Twin-Tube Tunnel Crossing Fault Zone with Extra-Large Section

Study on Response and Influencing Factors of Shield Single/Twin Tunnel under Seismic Loading using FLAC 3D

Contact Info

Product

Resources

About