Mechanical characteristics of high-temperature tunnel based on analytical method

Liu, N. F.; Li, N.; Liu, J. P.; Guo, Xinglin

doi:10.1201/b14917-108

Cited by 6 publications

(2 citation statements)

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“…With the depth increasing, not only the in situ stress rises significantly but also the ground temperature increases significantly [7][8][9][10][11]. In the construction of the Bulungkol-Gongur hydropower station, the tunnel's surrounding rock temperature is as high as 105 °C and the maximum in situ stress is approximately 50 MPa [12]. Meanwhile, a host of tunnels in areas with high ground temperature also experienced severe and frequent rockburst disasters.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Strain Rockburst considering Temperature Effect: Status‐of‐the‐Art and Prospect

Gong

2021

Shock and Vibration

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In deep mining and excavation of tunnels with high geothermal, the surrounding rock is not only subjected to high ground stress but also subjected to high temperature. Temperature will change mechanical characteristics and energy storage capacity of rocks, as well as increase the destructiveness and randomness of rockburst. To reveal the mechanism of high-temperature strain burst in deep rock, the rockburst tests from uniaxial compression to three-dimensional compression were reviewed, and the research results of the minimum principal stress rapid unloading, true-triaxial loading with one free face, and dynamic disturbance triggered pre-heated granite rockburst simulation tests were focused on. According to the occurrence state of country rock for deep high-temperature and stress state in the whole process during excavation, six development directions for high-temperature strain rockburst simulation tests were proposed: (1) constructing the damage constitutive models of high-temperature rocks according to linear energy dissipation law; (2) developing the true triaxial rockburst simulation testing system accomplishing the function of “real-time high temperature + unloading + dynamic disturbance”; (3) considering the true triaxial rockburst simulation test after microwave irradiation; (4) developing the real-time high-temperature rockburst simulation testing device for large-size specimens and internal unloading; (5) focusing on the energy actuating mechanism for deep high-temperature rock failure via rockburst simulation tests; and (6) implementing the three-dimensional rockburst simulation test on the basis of deep in situ coring.

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Section: Introductionmentioning

confidence: 99%

Experimental Study of Strain Rockburst considering Temperature Effect: Status‐of‐the‐Art and Prospect

Gong

2021

Shock and Vibration

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“…In underground engineering problems that are affected by high temperatures, existing achievements and studies focus on the supporting structure and laws of hightemperature stress of surrounding rock caused by fire and radioactive substances [1][2][3][4][5]. Studies on stress problems caused by high temperature differences are few, especially in hydraulic tunnels [6][7][8][9]. In studying the temperature field distribution of the surrounding rock in a tunnel and its impact on the surrounding rock in the supporting structure, a relatively large amount of research work has focused on the cold region of the tunnel [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Analytical Study on Mechanical Properties of High Rock Temperature Diversion Tunnel

Yao

Wan

et al. 2019

Advances in Civil Engineering

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e high temperature of rock used in different working conditions has a significant effect on the deformation characteristics and the mechanics of tunnel lining support structure. A test using a laboratory model is designed to study the quantitative relationship between the temperature difference and the support force. rough the laboratory model test, the strain and stress variation characteristics of the supporting structure of a water diversion tunnel under different surrounding rock temperatures and different water temperatures were simulated. e variation characteristics of the supporting structure under various working conditions, such as a different initial temperature field, different crossing water temperature of the diversion tunnel during runtime, and repairing period after the water is emptied, were analyzed. e relationship between the high-temperature difference between the inner and outer walls of the tunnel lining support structure and the internal temperature stress of the supporting structure was obtained and compared with the results from numerical experiments. e test results showed that a high circumferential tensile stress is created in the support structure of the high-temperature diversion tunnel due to the temperature difference between the inner and outer walls of the support structure caused by water going through the high-temperature diversion tunnel. e radial compressive stress increases by 45-50%, and the circumferential tensile stress increases by 40-60%. e results provide references for the design of the support structure in a high-temperature tunnel.

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

Peng

et al. 2021

Rock Mech Rock Eng

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Mechanical characteristics of high-temperature tunnel based on analytical method

Cited by 6 publications

References 0 publications

Experimental Study of Strain Rockburst considering Temperature Effect: Status‐of‐the‐Art and Prospect

Experimental Study of Strain Rockburst considering Temperature Effect: Status‐of‐the‐Art and Prospect

Experimental and Analytical Study on Mechanical Properties of High Rock Temperature Diversion Tunnel

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

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