Monitoring and Analysis of Geotemperature during the Tunnel Construction

Wen, Tao; Hu, Zheng; Wang, Yankun; Zhang, Zihan; Sun, Jinshan

doi:10.3390/en15030736

Cited by 11 publications

(3 citation statements)

References 21 publications

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“…The heat dissipation effect of mechanical equipment in the high-temperature environment is not ideal, and the failure rate increases significantly [24]. If the limit temperature of the machine is exceeded, the machine will be damaged.…”

Section: Influences Of High Geotemperature On Tunnel Constructionmentioning

confidence: 99%

Review of Research Progresses and Application of Geothermal Disaster Prevention on Large-Buried Tunnels

2022

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Geothermal disaster caused by high geotemperature is a commonly encountered geological problem in tunnel engineering, especially in large-buried tunnels, which is directly related to the safety, technology, and economy of tunnel construction. It seriously affects the personnel security and the performances of construction equipment and building materials, greatly increasing the construction difficulty, and extending the total construction period, which has become a major issue to be urgently solved in the tunnel construction. This paper first briefly introduces the formation mechanism of the high-geotemperature environment of a large-buried tunnel and analyzes the significant influences of high-temperature on personnel, equipment, and materials in the construction process of tunnel engineering. Then, the worldwide research progress of rock mechanics in high-temperature large-buried tunnels is systematically described, including the thermo-mechanical properties of rock mass, the thermo-mechanical properties of shotcrete, and the rheological mechanism and control technology of surrounding rock. Subsequently, the previous geothermal disaster classification of large-buried tunnels is summarized and evaluated. Finally, the research findings of the key technologies of geothermal disaster prevention and control are presented in detail from three aspects of temperature reduction, thermal insulation, and personal protection, which are of great theoretical and practical significance for ensuring the safety design and construction of tunnels in similar geological environment.

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Section: Influences Of High Geotemperature On Tunnel Constructionmentioning

confidence: 99%

Review of Research Progresses and Application of Geothermal Disaster Prevention on Large-Buried Tunnels

2022

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“…Song et al [10] developed an FBG inclinometer based on the conjugate beam method, which was used to measure soil deformation and pile disturbance during tunnel construction. Wen et al [11] measured and analyzed the temperatures of air, rock, and water during tunnel construction, and the ndings can provide guidance for the construction of high-temperature tunnels.…”

Section: Introductionmentioning

confidence: 99%

Monitoring and geological advance prediction for tunnel construction: A case study of shangzhuang tunnel

Li,

Zhao,

Cao

et al. 2024

Preprint

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During real-time tunnel construction in geologically complex areas, the settlement of rock formations with special physic-mechanical properties and freshly constructed tunnel segments have a serious impact on the progress and safety of the project. Therefore, the implementation of tunnel monitoring and advance geological prediction are important for tunnel construction. The mountain body where the Shangzhuang Tunnel is located is typically characterized by poor mechanical properties, rock fragmentation and weak stability. The vault subsidence, peripheral convergence inside the tunnel and surface settlement outside the tunnel were monitored by total station instrument; and the geo-radar was used to realize the geological advance prediction. The results show that, the change curves of vault subsidence and peripheral convergence with tunnel length have the same trend, which increase first and then decrease in general. Anomalous deformation of 8.7 mm was observed at the mileage of 683 m. The results of geological advance prediction are consistent with the on-site observation, which can provide reference for the safe, smooth and economic construction of the tunnel project.

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“…However, with gradual improvements in infrastructure, the development center of China's transportation and hydropower industries has gradually shifted to the Qinghai-Tibet Plateau [7]. Therefore, in this complex and dangerous area, a large number of ultra-long and deeply buried tunnels are under construction or planning, which inevitably brings many hazards [8][9][10]. High-geostress disasters, represented by rock bursts and squeezing deformations, have always been the biggest problem in deep rock excavation [11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

The Deformation Characteristics of the Zhuka Fault in Lancang River and Its Influence on the Geostress Field

Hu,

Wen,

et al. 2023

Sustainability

Self Cite

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The construction of infrastructure projects such as the Sichuan–Tibet Railway and western cascade hydropower stations has led to the increasing development of ultra-long and deeply buried tunnels in an environment characterized by highly active neotectonic movement, which affects the sustainable development of ecological civilization in Tibet. However, the effects of faults resulting from tectonic activity on the distribution of geostress fields have not been systematically studied. This research focuses on the development characteristics and basic type of the Zhuka fault near the RM hydropower station, aiming to analyze the phenomenon of geostress concentration in the study area. Field investigations have revealed significant high-geostress damage on the downstream slope of the lower dam site, situated on the hanging wall of the Zhuka fault. The results indicate a correlation between these high-geostress phenomena and the Zhuka fault, suggesting the concentration of geostress within a certain range on the hanging wall and outside of the fault zone. Stress concentration primarily depends on the characteristics of fault thrusting and fault morphology. The left-lateral strike-slip and thrusting process of the Zhuka fault, combined with NNW-directed tectonic compression stress and sudden changes in fault strike, contribute to geostress concentration within a specific range of the fault hanging wall. The observed high-geostress damage to the hard rock on the valley slope results from the combined effect of construction stress concentration and fourth-order valley incision stress concentration, which influences site selection for the RM hydropower station, thereby highlighting the role of geostress concentration outside the fault zone in engineering practice. This study provides valuable insights into geostress concentration and its implications for sustainable development in the Sichuan–Tibet region.

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Monitoring and Analysis of Geotemperature during the Tunnel Construction

Cited by 11 publications

References 21 publications

Review of Research Progresses and Application of Geothermal Disaster Prevention on Large-Buried Tunnels

Review of Research Progresses and Application of Geothermal Disaster Prevention on Large-Buried Tunnels

Monitoring and geological advance prediction for tunnel construction: A case study of shangzhuang tunnel

The Deformation Characteristics of the Zhuka Fault in Lancang River and Its Influence on the Geostress Field

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