Prediction of Surrounding Rock Classification of Highway Tunnel Based on PSO-SVM

2019 ◽  
Author(s):  
Xuhong Li ◽  
Qiang Wang
Keyword(s):  
Surrounding Rock ◽  
Rock Classification ◽  
Highway Tunnel

scholarly journals A Novel Model of the Ideal Point Method Coupled with Objective and Subjective Weighting Method for Evaluation of Surrounding Rock Stability

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Yingchao Wang ◽  
Ning Zhao ◽  
Hongwen Jing ◽  
Bo Meng ◽  
Xin Yin
Keyword(s):  
Present Model ◽  
Ideal Point ◽  
Surrounding Rock ◽  
Point Method ◽  
Good Prospect ◽  
Weighting Method ◽  
Rock Classification ◽  
Rock Stability ◽  
The Ideal

The classification of surrounding rock stability is the critical problem in tunneling engineering. In order to decrease engineering disasters, the surrounding rock stability should be accurately evaluated. The ideal point method is applied to the classification of surrounding rock stability. Considering the complexity of surrounding rock classification, some factors such as rock uniaxial compressive strengthen, integrality coefficient of rock mass, the angle between tunnel axis and the main joint, joints condition, and seepage measurement of groundwater are selected as evaluation indices. The weight coefficients of these evaluation indices are determined by the objective and subjective weighting method, consisting with the delphi method and the information entropy theory. The objective and subjective weighting method is exact and reliable to determine the weights of evaluation indices, considering not only the expert’s experiences, but also objectivity of the field test data. A new composite model is established for evaluating the surrounding rock stability based on the ideal point method and the objective and subjective weighting method. The present model is applied to Beigu mountain tunnel in Jiangsu province, China. The result is in good agreement with practical situation of surrounding rock, which proves that the ideal point method used to classify the surrounding rock in tunnels is reasonable and effective. The present model is simple and has very strong operability, which possesses a good prospect of engineering application.

scholarly journals Discussion and Determination to Surrounding Rock Classification of Metal Mine

2011 ◽  
Vol 26 ◽  
pp. 1740-1748 ◽  
Author(s):  
Sun Hui ◽  
Zheng Ying-ren ◽  
Wang Zai-quan ◽  
Zhang Li-ming
Keyword(s):  
Surrounding Rock ◽  
Rock Classification ◽  
Metal Mine

Classification of Surrounding Rock of Bolt Supported in Coal Mine Roadway

2014 ◽  
Vol 986-987 ◽  
pp. 775-778 ◽  
Author(s):  
Feng Shan Han ◽  
Li Song
Keyword(s):  
Coal Mine ◽  
Classification System ◽  
Knowledge Engineering ◽  
Surrounding Rock ◽  
Rock Classification ◽  
Coal Roadway ◽  
Mine Roadway ◽  
Important Significance ◽  
Bolt Support

Classification of Surrounding rock of roadway of Coal mine bolt supporting is the basis of bolting design, To scientifically design coal roadway bolting, classification of surrounding rock of coal roadway bolting must first be carry out. in this paper, the comprehensive application of knowledge engineering, rock mechanics, we developed the surrounding rock classification system for the bolt support of coal mine roadway engineering, the surrounding rock classification system is practical easy to use, the bolt supporting of roadway surrounding rock classification results to the coal mine roadway bolt support has important significance and practical value.

scholarly journals Study on construction mechanics behavior of weak surrounding rock with four-lane highway tunnel

2018 ◽  
Author(s):  
Fujin Hou ◽  
Shucai Li ◽  
Xinzhi Li ◽  
Wenjiang Li ◽  
Qing Jiang ◽  
...  
Keyword(s):  
Surrounding Rock ◽  
Highway Tunnel ◽  
Construction Mechanics ◽  
Weak Surrounding Rock

Analysis on the Mechanical Behavior of Pipe Roof and Rock Bolt of Shallow and Unsymmetrical Tunnel in Soft Rock

2012 ◽  
Vol 443-444 ◽  
pp. 267-271
Author(s):  
Xu Dong Cheng ◽  
Peng Ju Qin
Keyword(s):  
Soft Rock ◽  
Surrounding Rock ◽  
Mechanical Behaviors ◽  
Maximum Displacement ◽  
Tunnel Excavation ◽  
Finite Element Software ◽  
Highway Tunnel ◽  
Geological Conditions ◽  
The Impact ◽  
Rock Strata

In this paper, the mechanical behaviors of pipe roof and bolt of shallow and unsymmetrical tunnel in soft rock are analyzed. Through the finite element software Phase2.0, combined with the geological conditions that construction site often appear, the mechanical behaviors of pipe roof and bolt and surrounding rock in the process of horseshoe highway tunnel construction in the condition that surface is soft rock and underground for the bedrock are analyzed. Research results show that: after tunnel excavation in soft rock, surrounding rock near the tunnel is easy to suffer soft-rock large deformation even failure, which needs to timely support；Due to the impact of the unsymmetrical tunnel, the mechanical behaviors of surrounding rock are unsymmetrical, such as the maximum displacement of tunnel around 0.4 m distant from apex of arch ring, the stress is asymmetrical on both sides of the tunnel arch ring etc; In addition, pipe roof can effectively prevent from the displacement of soft rock strata, improve tunnel strength factor, reduce the plastic zone of surrounding rock. This paper provides theoretical basis for the design of pipe roof and bolt.

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