Investigation of the impacts of tunnel excavation on karst groundwater and dependent geo-environment using hydrological observation and numerical simulation: a case from karst anticline mountains of southeastern Sichuan Basin, China

2021 ◽  
Author(s):  
Si Chen ◽  
Haiyou Peng ◽  
Chang Yang ◽  
Bolin Chen ◽  
Lichuan Chen
Keyword(s):  
Numerical Simulation ◽  
Sichuan Basin ◽  
Karst Groundwater ◽  
Tunnel Excavation ◽  
Southeastern Sichuan Basin

Application of ABAQUS in Surrounding Rock Stability Analysis of Shallow Large Cross-Section Tunnel

2015 ◽  
Vol 777 ◽  
pp. 8-12 ◽  
Author(s):  
Lin Zhen Cai ◽  
Cheng Liang Zhang
Keyword(s):  
Numerical Simulation ◽  
Rock Mass ◽  
Strong Support ◽  
Surrounding Rock ◽  
Tunnel Engineering ◽  
Tunnel Excavation ◽  
Rock Stability ◽  
Rock Bolting ◽  
Excavation Support ◽  
The Stability

HuJiaDi tunnel construction of Dai Gong highway is troublesome, the surrounding-rock mass give priority to full to strong weathering basalt, surrounding rock integrity is poor, weak self-stability of surrounding rock, and tunnel is prone to collapse. In order to reduce disturbance, taking advantage of the ability of rock mass, excavation adopt the method of "more steps, short footage and strong support". The excavation method using three steps excavation, The excavation footage is about 1.2 ~ 1.5 m; The surrounding rock bolting system still produce a large deformation after completion of the first support construction, it shows that the adopted support intensity cannot guarantee the stability of the tunnel engineering. Using ABAQUS to simulate tunnel excavation support, optimizing the support parameters of the tunnel, conducting comparative analysis with Monitoring and Measuring and numerical simulation results, it shows that the displacement - time curves have a certain consistency in numerical simulation of ABAQUS and Monitoring and Measuring.

Micro-Characteristics of the Shale in the First Member of Silurian Longmaxi Formation in Southeastern Sichuan Basin, China

2017 ◽  
Vol 17 (9) ◽  
pp. 6662-6669 ◽  
Author(s):  
Shengxiang Long ◽  
Yongmin Peng ◽  
Hua Liu ◽  
Chunpeng Zhao ◽  
Jianhua Zhao ◽  
...  
Keyword(s):  
Sichuan Basin ◽  
Longmaxi Formation ◽  
Southeastern Sichuan Basin

Paleogeography and shale development characteristics of the Late Permian Longtan Formation in southeastern Sichuan Basin, China

2018 ◽  
Vol 95 ◽  
pp. 67-81 ◽  
Author(s):  
Liangbiao Lin ◽  
Yu Yu ◽  
Changbo Zhai ◽  
Yehan Li ◽  
Yanan Wang ◽  
...  
Keyword(s):  
Sichuan Basin ◽  
Late Permian ◽  
Southeastern Sichuan Basin

Analysis of the Mechanical Property of Collapse in Shallow-Buried Loess Tunnel under Unsymmetrical Pressure

2013 ◽  
Vol 645 ◽  
pp. 426-429 ◽  
Author(s):  
Xiao Hui Xue ◽  
Zhong Ming Su
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Mechanical Property ◽  
Finite Element ◽  
Collapse Mechanism ◽  
Tunnel Excavation ◽  
Finite Element Numerical Simulation ◽  
Tunnel Collapse ◽  
Primary Support

Based on selecting a tunnel collapse under typical conditions of the shallow-buried terrain under unsymmetrical pressure, analyzing the monitoring measurement date, using the software of finite element numerical simulation, the paper simulates the tunnel excavation in lengthwise, deduces the change laws of stress in primary support, the mechanical properties and the collapse mechanism.

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