Development and Application of a Large-Scale
ThreeDimensional&nbsp;Geomechanical
Model Test System

WANG Junxiang; HU Kai′en; GUO Lianjun; KOU Haijun; LI Lin; CUI Ningkun

doi:10.3973/j.issn.2096-4498.2022.09.006

Tunnel Construction >

2022 , Vol. 42 >Issue 9: 1546 - 1560

DOI: https://doi.org/10.3973/j.issn.2096-4498.2022.09.006

Development and Application of a Large-Scale ThreeDimensional Geomechanical Model Test System

WANG Junxiang ,
HU Kai′en ,
GUO Lianjun ,
KOU Haijun ,
LI Lin ,
CUI Ningkun

Expand

(1. School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, Liaoning, China;2. The Fifth Engineering Co., Ltd. of China Railway 19th Bureau Group, Dalian 116100, Liaoning, China)

Online published: 2022-10-10

Fold

Abstract

To investigate the water inrush disaster mechanism of tunnel excavation in marlite and the information evolution law, a case study is conducted on the Qinyu tunnel of the LanzhouHaikou National Expressway, and similar material of marlite tunnel surrounding rock is developed. Then, a largescale tunnel water inrush threedimensional geomechanical model test system is developed to achieve lowfrequency periodic loading and unloading, automatic data collection, and stable water pressure loading. Furthermore, an early warning system for tunnel water inrush disaster is developed using the Python programming language, based on which the model test of the evolution process of water inrush disaster in marlite tunnel is performed. The research results show the following: (1) The tunnel excavation disturbance will destroy the balance between the pressure of the surrounding rock and that of seepage water, causing microfissures in the surrounding rock to expand and penetrate, and the water inrush phenomenon is caused further. (2) When water inrush occurs, the pressure, seepage water pressure, and displacement of the waterresisting surrounding rock will show an obvious sudden change; the maximum release rates of surrounding rock pressure and seepage water pressure are 18.6% and 73.35%, respectively, and the maximum displacement is 0.18 mm. (3) The similar materials of marlite can better meet the test requirements, as well as the stability and reliability of the threedimensional geomechanical model test system for tunnel water inrush.

Key words： tunnel; marlite; model test; similar material; water inrush mechanism; disaster early warning; geomechanical model test system

Cite this article

WANG Junxiang , HU Kai′en , GUO Lianjun , KOU Haijun , LI Lin , CUI Ningkun .

Development and Application of a Large-Scale ThreeDimensional Geomechanical Model Test System

[J]. Tunnel Construction, 2022 , 42(9) : 1546 -1560 . DOI: 10.3973/j.issn.2096-4498.2022.09.006

Options

Outlines

〈

〉

模态框（Modal）标题

Abstract

Cite this article