Author
Hongchuan Liu
Bio: Hongchuan Liu is an academic researcher from Beijing University of Technology. The author has contributed to research in topics: Drainage & Ballast. The author has an hindex of 3, co-authored 3 publications receiving 21 citations.
Papers
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TL;DR: In this article, a conceptual bottom drainage and water pressure reduction system at the bottom of railway tunnel is proposed, which includes a transverse catchment system, a longitudinal water conducting system and a bottom-to-up water drainage system.
31 citations
TL;DR: In this article, the feasibility of bottom-up drainage and water pressure reduction system for underwater tunnels has been evaluated and shown to reduce the secondary lining external water pressure on underwater tunnels.
Abstract: To efficiently reduce the secondary lining external water pressure on underwater tunnels, the feasibility of a novel bottom-up drainage and water pressure reduction system for reducing has been val...
10 citations
Patent•
26 Apr 2017
TL;DR: In this paper, a testing device for bottom drainage and pressure releasing effects of a tunnel in a water-rich area is described, which consists of two parts including a main structure and an external connection structure.
Abstract: The invention discloses a testing device for verifying bottom drainage and pressure releasing effects of a tunnel in a water-rich area and belongs to the technical field of tunnel engineering. The test device comprises two parts including a main structure and an external connection structure. A water inlet is formed in each of the bottoms of two ends of a test box, stones are paved at the bottom of the test box, two first concrete plates are arranged on the stones, and a simulated construction joint is formed between the two first concrete plates; a water collecting pipe is arranged between the first concrete plates and a waterproof and water drainage plate. The waterproof and water drainage plate is arranged on the lower side of a second concrete plate simulating secondary lining, and the upper side of the second concrete plate is filled with sand. A drainage pipe is connected with the water collecting pipe, the water collecting pipe is horizontally laid, the drainage pipe is vertically laid, and the water collecting pipe and the drainage pipe are perpendicular. The upper part of the test box is closed by a test box cover plate. The external connection structure is a booster pump externally connected with the water inlets, and the upper part of the test box cover plate is externally connected with hydraulic jacks. The device is simple in structure form, can be made of diversified alternative materials and can simulate waterproof and drainage tests of tunnels under multiple surrounding rock conditions.
3 citations
Cited by
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TL;DR: In this paper, an analytical method is proposed to predict the surrounding rock pressure on deep twin-tunnels through the modification of the Protodyakonov's equilibrium arch theory (PEAT), and the influences of the clear distance, reinforcement coefficient, excavation span and excavation height on the loosening pressure are discussed in some details.
54 citations
TL;DR: Wang et al. as mentioned in this paper conducted a systematic study on the causes of highway tunnel defects, which revealed that lining cracks and water leakage are the most common defects in the highway tunnels of China.
46 citations
TL;DR: In this paper, a case study describing the structural responses of a shield tunnel caused by unexpected leakage and the corresponding treatment measures is presented, and the authors show that the structural response caused by leakage is mainly differential settlement, but the horizontal deformation is not significant.
30 citations
TL;DR: In this article, the authors solved the poro-mechanical problem of stress and pore pressure distribution using the complex variable method and the conformal mapping technique, which relaxes the assumptions of thin liners and negligible stresses that limit the usefulness of existing approaches.
25 citations
TL;DR: In this paper, a physical experiment and corresponding numerical model were established to study the trends of the pore water pressure in the rock mass in a seepage channel, and reasonable agreements that would provide a reference for the conditions of high water-pressure disasters in deep buried tunnel construction were obtained.
Abstract: Well-connected seepage channels are the key components of tunnel water inrush. To study the trends of the pore water pressure in the rock mass in a seepage channel, the physical experiment and corresponding numerical model were established. First, in the seepage experiment under excavation disturbance, the propagation rate of the high-pressure water source and the growth rate of the pore water pressure in the rock mass were analyzed by considering the different water pressures. Second, under the same model size, parameters, and working conditions, the finite element method was used to simulate the seepage process of water in the rock mass. From the microlevel, the evolution process of the pore water pressure isosurface was obtained. The results showed that the pressure water head is positively correlated with the pore water pressure in the rock mass, which displays multiple approximate relationships. Moreover, when the water pressure is high, excavation disturbance can significantly increase the pore water pressure in the rock mass. The disturbance caused by the first excavation is larger than the subsequent excavations. In addition, the research results were compared with previous results. Reasonable agreements that would provide a reference for the conditions of high water-pressure disasters in deep buried tunnel construction were obtained.
22 citations