Application of Modified Hoek–Brown Strength Criterion in Water-Rich Soft Rock Tunnel

Deng, Xianghui; Wang, Yuncai; Wang, Rui; Xia, Daohong; Zhao, Zhi‐Qing

doi:10.1155/2021/5552791

Cited by 5 publications

(2 citation statements)

References 25 publications

(28 reference statements)

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“…Rock is a kind of discontinuous medium, so the physical and mechanical properties will change greatly under the influence of complex geological conditions, such as groundwater and high geostress [1][2][3]. If these changes are not considered in construction, the stability of underground engineering will be greatly affected [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Properties of Gneiss under Different Ground Stresses

Wang

Deng

et al. 2022

Sensors

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Initial geostress has great influence on the properties of gneiss. The physical and mechanical properties of gneiss vary considerably due to different initial geostresses, which exert a huge effect on the stability of underground engineering. In order to explore the influence of initial ground stress on the properties of gneiss. Changes in the physical properties (e.g., P-wave velocity and volumetric weight), mechanical properties (e.g., compressive strength, elastic modulus, and residual strength) and failure mode of gneiss are analyzed by conducting physical and mechanical tests on gneiss in different ground stress areas. The results show that high geostress can improve the pre-peak mechanical properties of gneiss, and weaken its post-peak mechanical properties. When the initial geostress is greater, the pre-peak mechanical properties are better, and the post-peak mechanical properties are worse. The failure mode of gneiss under high ground stress is primarily brittle failure. When the initial ground stress is greater, brittleness is stronger. According to the research results of this paper, it can provide the basis for the optimization and improvement of underground engineering support in gneiss strata with high geostress. The research results have important reference value and guiding significance for underground engineering construction in high geostress gneiss areas.

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Section: Introductionmentioning

confidence: 99%

Investigation on the Properties of Gneiss under Different Ground Stresses

Wang

Deng

et al. 2022

Sensors

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“…The results of Li et al [7] indicated that the dynamic characteristics of regional groundwater and the temporal and spatial evolution of seepage field under the influence of tides must be considered in engineering construction. The results of Deng et al [8] showed that when excavating tunnels in water-rich soft rock formations, the infiltration of groundwater greatly reduced the strength of the soft rock. The results of Wang et al [9] show that the influence of groundwater on tunnel engineering is very complex.…”

Section: Introductionmentioning

confidence: 99%

Research on the Influence of Groundwater in Coastal Areas on the Stress and Deformation Characteristics of Integrated Pipe Gallery

Tian

Wang

et al. 2022

Geofluids

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With the high demand for basic resources such as electricity, communication, water supply, and gas in cities, most cities in my country are vigorously developing underground integrated pipe gallery. When constructing pipe gallery in coastal areas, it is necessary to consider the impact of groundwater level on structural calculations. There is still a lack of systematic research in domestic and foreign literature. Relying on the Qingdao West Coast New Area Project, this paper uses a combination of laboratory tests and MIDAS GTS/NX numerical simulation to study the influence of groundwater in the coastal area on the stress and deformation characteristics of the integrated pipe gallery. The results show that (1) the Mises stress on the roof and bottom of the integrated pipe gallery increases continuously with the rise of the groundwater level. Due to the effect of the effective stress, the Mises stress on the side wall shows a decreasing trend. (2) Due to the influence of the construction form of the cross-section interface, the maximum principal stress of each part of the M side is always smaller than that of the N side; with the continuous increase of groundwater level, the maximum principal stress at each part of the N and M sides of the pipe gallery structure joint gradually increases. (3) The overall structure of the pipe gallery floats up. Under the action of the buoyancy force, the bottom plate moves upward, and the surface displacement rises continuously with the rise of the groundwater level. (4) When the groundwater depth is the same, the analysis of the test results and the numerical simulation calculation results are basically consistent, which further verifies the validity of the numerical simulation calculation and has reference value. (5) The engineering example shows that in order to reduce the service life of the integrated pipe gallery, the impact of groundwater on the integrated pipe gallery cannot be ignored.

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Laser-based intelligent perception method for tunnel invasion

Yang

et al. 2021

Mechanics of Advanced Materials and Structures

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Application of Modified Hoek–Brown Strength Criterion in Water-Rich Soft Rock Tunnel

Cited by 5 publications

References 25 publications

Investigation on the Properties of Gneiss under Different Ground Stresses

Investigation on the Properties of Gneiss under Different Ground Stresses

Research on the Influence of Groundwater in Coastal Areas on the Stress and Deformation Characteristics of Integrated Pipe Gallery

Laser-based intelligent perception method for tunnel invasion

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