Effect of the Blocking Water and Limiting Discharge and Surrounding Rock Permeability on the Stability of Subsea Tunnel

Li, Genxiao; Wang, Chang; Wang, Gang; Xiao, Zhiyong; Wu, Xianlong; Jiang, Feng

doi:10.1007/s10706-020-01563-4

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…e vibration generated by train operation propagates through the tunnel and surrounding soil and has an impact on the environment. Under the action of long-term train vibration load, the waterproof effect and durability of the railway tunnel structure will be significantly affected, and it will also affect the track's performance, ride comfort, passenger comfort, and normal train operations [8,9]. e model of the grade-crossing tunnel is shown in Figure 1.…”

Section: Dynamic Responsementioning

confidence: 99%

Computer-Aided Analysis of Small Clear Space Intersection Tunnel and Heavy Load Railway Surrounding Rock Structure Dynamic Response Characteristics Analysis under Intelligent Manufacturing

Hao

Wang

2022

Scientific Programming

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Among many tunnel construction projects, small clear tunnels have been the focus of urban rail transit construction in recent years. The purpose of this research work is to study the dynamic response characteristics of the surrounding rock structure of a heavy-duty railway with a small clearance crossing tunnel. It is proposed to analyze the dynamic response characteristics of the surrounding rock structure through the frequency response function. The vertical acceleration, tensile force, stress, and internal strength of the pipe section are specifically analyzed. The influence of the pipe joint and the assembly method on the dynamic response is also analyzed. The influencing factors of stability are analyzed from buried depth, clear distance, and surrounding rock grade. Studies have shown that the minimum clear distance of crossing tunnels increases nonlinearly with the increase of tunnel depth and gravity, and decreases nonlinearly with the increase of cohesion, internal friction angle, calculated internal friction angle, and lateral pressure coefficient. When other parameters are the same and when the side pressure coefficient is less than 1, the minimum clear distance is larger than that of the side pressure coefficient when it is equal to 1. When the vibration frequency exceeds 100 Hz, the coherence coefficient is basically close to 1, indicating that the frequency response function response result of this section is the most reliable. It is hoped that it can provide a reference for the dynamic stability analysis of the surrounding rock structure of the heavy-duty railway surrounding rock structure and the surrounding stratum and the research of structural vibration reduction technology for the small clearance crossing tunnel in the future.

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Section: Dynamic Responsementioning

confidence: 99%

Computer-Aided Analysis of Small Clear Space Intersection Tunnel and Heavy Load Railway Surrounding Rock Structure Dynamic Response Characteristics Analysis under Intelligent Manufacturing

Hao

Wang

2022

Scientific Programming

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“…In this method, grout is used to replace the water existing in cracks and pores, block the path of the groundwater, restrict the migration of the groundwater, and form rock and soil with certain impermeability to ensure the stability of the surrounding environment of the tunnel. Grouting waterproofing does not mean that the added solid is dripping impervious through grouting, but more emphasis is placed on reducing the adverse impact of water on the construction and the structure through grouting [32,33]. e grouting scheme adopted for the Gongbei tunnel is as follows: the grouting holes were reserved on the steel pipes of the pipe roof, the grouting holes were arranged according to the principle of curtain grouting, and the grouting was conducted in each steel pipe.…”

Section: Grouting Ringmentioning

confidence: 99%

Discussion on the Waterproof and Drainage System of the Coastal Tunnel and Analysis of Water Pressure Law outside Lining: A Case Study of the Gongbei Tunnel

Zhao

Tan

Zhou

2021

Advances in Civil Engineering

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With the orderly promotion of the infrastructure construction in China, the number of coastal tunnels is increasing, but the coastal environment is accompanied by a large amount of groundwater and the designs of the waterproof and drainage system of coastal tunnels have always been a hot topic in the industry. If the waterproof and drainage system designs of the coastal tunnels are improper, the tunnel structure will easily be damaged and the stability and service life of the whole project will be affected. Based on the Gongbei tunnel project of the Hong Kong-Zhuhai-Macao Bridge, this paper discusses the designs of the waterproof and drainage system, and the waterproof detail structures of the Gongbei tunnel. Indoor similarity tests were carried out to study the law of the free water discharge of the tunnel under variable water heads, the relationship between the water pressure outside the lining and the water discharge, the relationship between the water pressure outside the pipe roof and the water discharge, and the distribution of water pressure around the tunnel. The reliability of the indoor similarity test was verified by the field test. The results show that the whole waterproof system should be adopted in the Gongbei tunnel, that is, grouting ring + pipe roof freezing ring + initial lining + waterproof board + tertiary lining. In a certain range, the greater the water head, the greater the free water discharge of the tunnel. When the water head is large, the free drainage tends to a fixed value. When the tunnel is completely plugged, the water pressure outside the tunnel is distributed from the hydrostatic pressure. When the tunnel adopts drainage measures, the water pressure outside the lining will be reduced to a certain extent even the water discharge is very small. The above research can provide a reference for the design of the waterproof and drainage system similar to the coastal tunnel in the future.

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Seepage to staggered tunnels and subterranean cavities: Analytical and HYDRUS modeling

Kacimov

Šimůnek

2022

Advances in Water Resources

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Effect of the Blocking Water and Limiting Discharge and Surrounding Rock Permeability on the Stability of Subsea Tunnel

Cited by 4 publications

References 11 publications

Computer-Aided Analysis of Small Clear Space Intersection Tunnel and Heavy Load Railway Surrounding Rock Structure Dynamic Response Characteristics Analysis under Intelligent Manufacturing

Computer-Aided Analysis of Small Clear Space Intersection Tunnel and Heavy Load Railway Surrounding Rock Structure Dynamic Response Characteristics Analysis under Intelligent Manufacturing

Discussion on the Waterproof and Drainage System of the Coastal Tunnel and Analysis of Water Pressure Law outside Lining: A Case Study of the Gongbei Tunnel

Seepage to staggered tunnels and subterranean cavities: Analytical and HYDRUS modeling

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