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Establishment and Visualization of an Integrated Surrounding-Rock Classification System for Large-Span Underground Caverns
(1 School of Architecture and Civil Engineering, Xi'an University of Science and Technology, Xi'an 710054; 2 Faculty of Engineering, China University of Geosciences, Wuhan 430074; 3 Hydro-China Huadong Engineering Coporation, Huangzhou 310014)
Abstract Commonly used surrounding-rock classification methods were integrated, and the correlation among the evaluation indexes and criteria of each method was analyzed to establish the equivalent conversion formulae and empirical correlation charts in terms of various classification methods based on the inherent essence. Considering the significant disturbance effect caused by large-span underground caverns, a quantitative representation regarding the impacts of the engineering factors on the quality deterioration of surrounding rock is presented based on the limited deterioration principle, and an integrated surrounding-rock classification system considering the engineering factors was established. A visualization program for an integrated surrounding-rock classification system for large-span underground caverns (ISRCS) was developed based on VB.Net language. This program can realize the typical function, namely inputting parameters and outputting various evaluation results at the same time. By using the arch of the main powerhouse of the Dagangshan hydropower station at section 0-60~0+166 as an example, a comprehensive assessment was carried out by this program regarding surrounding-rock classification, stability results, and support recommendations, and the analysis results agree well with the actual conditions.
Abstract：
Commonly used surrounding-rock classification methods were integrated, and the correlation among the evaluation indexes and criteria of each method was analyzed to establish the equivalent conversion formulae and empirical correlation charts in terms of various classification methods based on the inherent essence. Considering the significant disturbance effect caused by large-span underground caverns, a quantitative representation regarding the impacts of the engineering factors on the quality deterioration of surrounding rock is presented based on the limited deterioration principle, and an integrated surrounding-rock classification system considering the engineering factors was established. A visualization program for an integrated surrounding-rock classification system for large-span underground caverns (ISRCS) was developed based on VB.Net language. This program can realize the typical function, namely inputting parameters and outputting various evaluation results at the same time. By using the arch of the main powerhouse of the Dagangshan hydropower station at section 0-60~0+166 as an example, a comprehensive assessment was carried out by this program regarding surrounding-rock classification, stability results, and support recommendations, and the analysis results agree well with the actual conditions.
SHEN Yan-Jun-1,
Xu-Guang-Li-2,
Wei-Zhi-Yun-3
.Establishment and Visualization of an Integrated Surrounding-Rock Classification System for Large-Span Underground Caverns[J] MODERN TUNNELLING TECHNOLOGY, 2014,V51(4): 28-38
2014, Vol. 51 