FullScale Model Tests on Water Pressure
Resistance of Karst Tunnel Lining Structure: a Case
Study of New Yuanliangshan Tunnel

HUANG Mingli, JIANG Bo, WANG Chenglin, GUAN Qiang

doi:10.3973/j.issn.2096-4498.2022.S1.006

2022 , Vol. 42 >Issue S1: 48 - 55

DOI: https://doi.org/10.3973/j.issn.2096-4498.2022.S1.006

FullScale Model Tests on Water Pressure Resistance of Karst Tunnel Lining Structure: a Case Study of New Yuanliangshan Tunnel

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(1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. China Railway Eryuan  Chongqing Survey and Design Institute Co., Ltd., Chongqing 400023，China; 3. The 5th Engineering Co., Ltd. of China Railway 11th Bureau Group, Chongqing 400037, China)

Online published: 2022-08-22

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Abstract

A fullscale model test method for water pressure resistance of lining structure is proposed for New Yuanliangshan tunnel passing through highpressure waterrich karst areas. To validate the water pressure resistance of the tunnel lining structure, the external water pressure born by tunnel lining is transformed into internal water pressure. Then through numerical simulation results using realistic failure process analysis(RFPA) system, the conversion relation of different models′ hydraulic safety factors is established. The results show the following: (1) The ultimate hydraulic resistance of tunnel lining structure under external uniform water pressure and local water pressure is 1.44 and 0.67 times of the ultimate hydraulic resistance of fullscale model test, respectively. (2) The water pressure resistance of karst cave transitional section lining (K2.0) is 3.33 MPa, and that of the karst cave section lining (K3.0) is no less than 5.33 MPa, indicating the K2.0 and K3.0 lining of construction joints is reasonable for New Yuanliangshan tunnel, and meeting the water pressure resistance of the design requirements.

Key words： karst tunnel; lining structure; construction joint; fullscale model test; water pressure resistance

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HUANG Mingli, JIANG Bo, WANG Chenglin, GUAN Qiang . FullScale Model Tests on Water Pressure Resistance of Karst Tunnel Lining Structure: a Case Study of New Yuanliangshan Tunnel[J]. Tunnel Construction, 2022 , 42(S1) : 48 -55 . DOI: 10.3973/j.issn.2096-4498.2022.S1.006

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