Cracking Characteristics of the Surrounding Rocks of a Hydraulic Tunnel Under High Geothermal Conditions: A Model Test

Peng, Lifeng; Hu, Xiaochuan; Su, Guoshao; Qin, Zihua; He, Lei; He, Bin

doi:10.1007/s00603-020-02338-2

Cited by 25 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cracking and mechanical behaviors of materials under the multi-physics field coupling condition, such as thermo-hydro-mechanical coupling condition, have aroused increasing interests. [1][2][3][4][5][6] Aiming at the actual situation of rock engineering, such as stability analysis of tunnels, geothermal resource mining, underground storage of nuclear waste, and underground carbon dioxide storage, [7][8][9] many efforts on the influence of multi-physics field coupling have been made through theoretical, experimental, and numerical methods.…”

Section: Introductionmentioning

confidence: 99%

The nonlocal thermo‐hydro‐mechanical model for cracking behaviors of quasi‐brittle materials in the framework of advanced general particle dynamics

Zhou

Yao

et al. 2023

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

A novel nonlocal thermo-hydro-mechanical coupling model is proposed to investigate cracking behaviors of quasi-brittle materials in the framework of advanced general particle dynamics (GPD). The nonlocal thermal conduction equation and the nonlocal flow diffusion equation are derived based on nonlocal vector calculus and the microscopic constitutive equation. Moreover, the coupling influences are considered based on the nonlocal equation and the coupling principle. The governing equation of the coupling system is established in the framework of GPD. The correctness of the proposed model is verified through comparing with the corresponding experimental data, and the numerical results are in good agreement with experimental results. Finally, the proposed model is applied to analyze the deformation and cracking behaviors of rock mass around tunnels, and the stress redistribution is revealed under thermo-hydro-mechanical coupling condition. K E Y W O R D S advanced general particle dynamics, cracking and mechanical behaviors of rock-like materials, nonlocal thermo-hydro-mechanical coupling model, nonlocal vector calculus Highlights • A novel nonlocal thermo-hydro-mechanical coupling model is proposed to investigate the cracking behaviors of rocks. • The nonlocal thermal conduction equation and the nonlocal flow diffusion equation are derived. • The governing equation of the coupling system is established in the framework of advanced general particle dynamics.

show abstract

Section: Introductionmentioning

confidence: 99%

The nonlocal thermo‐hydro‐mechanical model for cracking behaviors of quasi‐brittle materials in the framework of advanced general particle dynamics

Zhou

Yao

et al. 2023

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…Kirzhner and Rosenhouse [26] analyzed the dynamic response of the rock surrounding tunnels during earthquakes in the FLAC program. Peng et al [27] found that high ground temperature and ground stress had a significant influence on the cracking mode of the surrounding rock of the hydraulic tunnel. Fan et al [28] used LS-DYNA to explore the crack growth of jointed rock mass under different ground stresses and verified that in-situ stress has an obvious guiding effect on crack growth.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Mechanical Characteristics of Horseshoe Tunnel Subjected to Blasting and Confining Pressure

Yao

Liu

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

The blast loading direction and in-situ stress field have an effect on the destruction process in the surrounding rock around the tunnel. Five blasting directions are considered in the experiment and simulation. The static stress distribution by confining pressure and the superposition stress waves process are discussed by simulation in LS-DYNA. Results indicated that the hoop stress accelerates the radial cracks growing, and the damage around the hole is not influenced by the blasting direction. The stress wave superposition and failure process along the tunnel are affected by the blasting direction. The distribution of static prestress is symmetrical under the uniform confining pressure (k = 1) and decelerates the crack extension by confining pressure. Under the non-uniform confining pressure loading (k ≠ 1), the tensile prestress is formed with a k increase and accelerates the horizontal crack propagation after blast loading. The concentrated stress is serious in the partial region along the tunnel, especially in the vault position under the static-dynamic coupling loading. Notably, the horizontal destruction area between the hole and the tunnel further expands when k increases.

show abstract

“…Cui [14] investigated the effect of hot-humid and hot-dry environments on the deformation of concrete for shotcrete in the context of high geothermal tunnels and the shrinkage inhibition effect of ber materials on concrete in a hot-dry environment. Peng [15] used a physical model test to study cracking characteristics of the surrounding rocks of hydraulic tunnels under high geothermal conditions, which can be helpful in the design of hydraulic tunnels under high geothermal conditions. Liu [16] set the standard curing environment as a reference condition to analyze the mechanical properties and pore structure characteristics of concrete for shotcrete use under hot-dry environments at different temperature by mechanical and mercury intrusion porosimetry (MIP) tests.…”

Section: Introductionmentioning

confidence: 99%

Study on Thermal Insulation and Seismic Effect for Fault-crossing Tunnel in High Geothermal Area

Cui

Shi

2022

Preprint

View full text Add to dashboard Cite

The fault-crossing tunnel in high geothermal areas can be severely damaged under strong earthquake. In this paper, numerical models were established in Flac3d to investigate the thermal insulation and seismic effects under the strong earthquake when using highly damped composite structure. The results showed that the thermal insulation effect of the plain concrete, the plain concrete highly damped composite structure and the steel fiber concrete highly damped composite structure were almost the same, which the plain concrete highly damped composite structure was slightly better. After applying the highly damped composite structure, the maximum principal stresses on the lining decreased, it showed that highly damped composite structure could enhance the seismic effect of tunnel. The safety factor of steel fiber concrete highly damped composite structure was 2.420, which was a 28.14% increase compared to plain concrete. Based on numerical simulations, the thermal insulation and seismic effect of steel fiber concrete highly damped composite structure was better than other seismic measures. The research can provide a reference for the design of thermal insulation and anti-earthquake for fault-crossing tunnel under strong earthquake in high geothermal area.

show abstract

Cracking Characteristics of the Surrounding Rocks of a Hydraulic Tunnel Under High Geothermal Conditions: A Model Test

Cited by 25 publications

References 30 publications

The nonlocal thermo‐hydro‐mechanical model for cracking behaviors of quasi‐brittle materials in the framework of advanced general particle dynamics

The nonlocal thermo‐hydro‐mechanical model for cracking behaviors of quasi‐brittle materials in the framework of advanced general particle dynamics

Dynamic Mechanical Characteristics of Horseshoe Tunnel Subjected to Blasting and Confining Pressure

Study on Thermal Insulation and Seismic Effect for Fault-crossing Tunnel in High Geothermal Area

Contact Info

Product

Resources

About