Research on Determination Loose Zone of Surrounding Rock in Highway Tunnel

Huang, Yue; Kou, Jun Shu; Fang, Hai; Li, Ming Liang; Liang, Yu‐Feng

doi:10.4028/www.scientific.net/amm.724.185

Cited by 2 publications

(2 citation statements)

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“…It has widely been recognized by industry insiders since the surrounding rock support theory based on broken rock zone has been put forward [15], and the broken rock zone is widely used in underground tunnel excavation projects such as coal mine roadway [16], railway tunnel [17], and highway tunnel [18]. e method for broken rock zone tests has been progressing.…”

Section: Broken Rock Zone Testsmentioning

confidence: 99%

Field Experimental Study on the Broken Rock Zone of Surrounding Rock and the Rock Borehole Shear Tests of the Large Deformation Tunnel

Han

Meng

Jing

et al. 2019

Advances in Materials Science and Engineering

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A large deformation tunnel in LIXIANG railway, named Zhongyi tunnel is located in Southwest of China, was taken for the engineering background. The field experiments of the broken rock zone and the borehole shear test were conducted. The results show that the range of the broken rock zone of the test sections is 4.20∼4.45 meters. The cohesive force and the internal friction angle of the test sections are 221.4∼224 kPa and 14.25∼15.14°, respectively. The test results are in good agreement with the status of the surrounding rock. The surrounding rock is mainly composed of shale, which is badly broken, and the integrity and the stability are poor. In this study, the reasons for the deformation and instability of the tunnel are analyzed combined with the in situ tests and the site condition, and the suggestions for the tunnel support are put forward. This study is of great significance to ensure the safety of the constructors and can improve the service years of the tunnel. In addition, it can provide reference for the same type of the tunnel construction.

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Section: Broken Rock Zone Testsmentioning

confidence: 99%

Field Experimental Study on the Broken Rock Zone of Surrounding Rock and the Rock Borehole Shear Tests of the Large Deformation Tunnel

Han

Meng

Jing

et al. 2019

Advances in Materials Science and Engineering

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“…With the development of structural health monitoring [17][18][19], the methods to determine the loose zone thickness of roadway surrounding rock generally include acoustic wave test, numerical simulation and, support vector machine prediction [20,21]. The acoustic wave test method [22] can directly and accurately determine the range of loose zone, however the field operation is cumbersome and the cost is high.…”

Section: Introductionmentioning

confidence: 99%

Predicting the Loose Zone of Roadway Surrounding Rock Using Wavelet Relevance Vector Machine

Yang

Wang

et al. 2019

Applied Sciences

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By applying the Wavelet Relevance Vector Machine (WRVM) method, this research proposes the loose zone of roadway surrounding rock prediction. Based on the theory of relevance vector machine (RVM), the wavelet function is introduced to replace the original Gauss function as the model kernel function to form the WRVM. Five factors affecting the loose zone of roadway surrounding rock are selected as the model input, and the prediction model of the loose zone of roadway surrounding rock based on WRVM is established. By using cross-validation method, the kernel parameters of three kinds of wavelet relevance vector machines (RVMs) are calculated. By comparing and analyzing the root mean square (RMS) error of the test results of each predictive model, the advantages and accuracy of the model are verified. In practical engineering applications, the average relative prediction errors of the Mexican relevance vector machine, the Morlet relevance vector machine and the difference of Gaussian (DOG) relevance vector machine models are accordingly 4.581%, 4.586% and 4.575%. The square correlation coefficient of the predicted samples is 0.95 > 0.9, which further verifies the accuracy and reliability of the proposed method.

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Research on Determination Loose Zone of Surrounding Rock in Highway Tunnel

Cited by 2 publications

References 0 publications

Field Experimental Study on the Broken Rock Zone of Surrounding Rock and the Rock Borehole Shear Tests of the Large Deformation Tunnel

Field Experimental Study on the Broken Rock Zone of Surrounding Rock and the Rock Borehole Shear Tests of the Large Deformation Tunnel

Predicting the Loose Zone of Roadway Surrounding Rock Using Wavelet Relevance Vector Machine

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