Invert Heave Disease and Treatment Measures of Operating Railway Tunnel in Horizontal Layered Rock Mass

2021 ◽  
pp. 37-56
Author(s):  
Linyi Li ◽  
Junsheng Yang ◽  
Jian Wu ◽  
Shuying Wang ◽  
Xinghua Fang ◽  
...  
Keyword(s):  
Rock Mass ◽  
Railway Tunnel ◽  
Layered Rock ◽  
Treatment Measures ◽  
Layered Rock Mass

Model Test Study on Influences of Layered Rock Mass Dip Angle on Stability of Deep-Buried Tunnel

2011 ◽  
Vol 90-93 ◽  
pp. 2363-2371
Author(s):  
Bin Wei Xia ◽  
Ke Hu ◽  
Yi Yu Lu ◽  
Dan Li ◽  
Zu Yong Zhou
Keyword(s):  
Rock Mass ◽  
Physical Model ◽  
Model Test ◽  
Physical Models ◽  
Physical Model Test ◽  
Stress Distributions ◽  
Failure Characteristics ◽  
Layered Rock ◽  
Layered Rock Mass ◽  
Dip Angle

Physical models of layered rock mass with different dip angles are built by physical model test in accordance with the bias failure characteristics of surrounding rocks of layered rock mass in Gonghe Tunnel. Bias failure characteristics of surrounding rocks in thin-layered rock mass and influences of layered rock mass dip angle on stability of tunnel are studied. The research results show that failure characteristics of physical models generally coincide with those of surrounding rocks monitored from the tunnel site. The failure regions of surrounding rock perpendicular to the stratification planes are obviously larger than those parallel to. The stress distributions and failure characteristics in the surrounding rocks are similar to each physical model of different dip angles. The stress distributions and failure regions are all elliptic in shape, in which the major axis is in the direction perpendicular to the stratification planes while the minor axis is parallel to them. As a result, obvious bias failure of surrounding rocks has gradually formed. The physical model tests provide reliable basis for theoretical analysis on the failure mechanism of deep-buried layered rock mass.

Constitutive model and elastic parameters for layered rock mass based on combined Hooke spring

2018 ◽  
Vol 10 (3-4) ◽  
pp. 145-156
Author(s):  
Zhang Ligang ◽  
Qu Guangqiu ◽  
Qu Sining ◽  
Liu Zhaoyi
Keyword(s):  
Rock Mass ◽  
Constitutive Model ◽  
Elastic Parameters ◽  
Layered Rock ◽  
Layered Rock Mass

scholarly journals Research on the Layered Rock Mass Excavation Relaxation Stability of Underground Caverns

2020 ◽  
Vol 165 ◽  
pp. 03024
Author(s):  
Ying Zhang ◽  
Heng Zhou ◽  
Shengjie Di ◽  
Xi Lu
Keyword(s):  
Rock Mass ◽  
Mechanical Characteristics ◽  
Generation System ◽  
Yield Zone ◽  
Layered Rock ◽  
Underground Caverns ◽  
Structure Surface ◽  
Layered Rock Mass ◽  
Power Generation System ◽  
The Stability

In order to compare the influence of rock mass parameters weakening on the deformation and stability of excavation caverns in layered rock mass, based on power generation system caverns of a hydropower station, the stability and deformation of the caverns is analyzed. The results show that the mechanical characteristics of the structure surface play a major role in controlling the stability of caverns. And the displacement and yield zone value of plan 3, which adopt elastic-plastic softening model, are significantly larger than other two. The method which consider the residual strength of structure surface is more suitable for the excavation calculation of layered rock mass cavern.

Research on Shear Failure Criterion for Layered Rock Mass

2012 ◽  
Vol 446-449 ◽  
pp. 1491-1496
Author(s):  
Zhi Zeng Zhang ◽  
Lan Lan Zhou ◽  
Zhen Xia Yuan ◽  
Zhong Hua Sun
Keyword(s):  
Rock Mass ◽  
Failure Criterion ◽  
Shear Failure ◽  
Layered Rock ◽  
Layered Rock Mass

Hydraulic fracturing model of a layered rock mass based on peridynamics

2021 ◽  
pp. 108088
Author(s):  
Mingqi Qin ◽  
Diansen Yang ◽  
Weizhong Chen ◽  
Shengqi Yang
Keyword(s):  
Rock Mass ◽  
Hydraulic Fracturing ◽  
Layered Rock ◽  
Layered Rock Mass

Non-Linear FEM Analysis for the Layered Rock-Mass Tunnel Based on the Twin Shear Strength Criterion

2010 ◽  
Vol 168-170 ◽  
pp. 152-155
Author(s):  
Xiang Qiu Wang ◽  
Zhi Guo Zhou ◽  
Yu Hong Zhang
Keyword(s):  
Shear Strength ◽  
Rock Mass ◽  
Mechanical Characteristics ◽  
Fem Analysis ◽  
Strength Criterion ◽  
Interface Element ◽  
Layered Rock ◽  
Shear Strength Criterion ◽  
Straight Beam ◽  
Layered Rock Mass

According to the geotechnical conditions, A FEM model has been established to analyse the mechanical characteristics of the highway tunnel in the layered rock mass. In this model the layered rock mass and the soften joint are simulated by the transversal isotropic material, the interfaces between layers are simulated by the element of rotational Goodman interface, but the interface between the lining structure and surrounding mass is proposed to simulate by an interface element with thickness, and the supporting of tunnel is simulated by the straight beam element. In the meantime, based on the twin shear strength criterion, the mechanical characteristics of rock, the stiff matrix of element for the layered rock mass, soften joint and interface have been discussed. The analytical model has been demonstrated by comparing the results of layered surrounding rock-mass FEM with the test data in situ.

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