砂化白云岩隧洞围岩分类方法SHF构建及应用

董家兴; 龚欣月; 米健; 范开元; 杨润学; 赵永川; 沐红元; 周伦顺

doi:10.3799/dqkx.2023.059

Volume 49 Issue 8

Aug. 2024

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Article Navigation > Earth Science > 2024 > 49(8): 2813-2825

Dong Jiaxing, Gong Xinyue, Mi Jian, Fan Kaiyuan, Yang Runxue, Zhao Yongchuan, Mu Hongyuan, Zhou Lunshun, 2024. Structure and Application of SHF Classification Method for Surrounding Rock of Sandy Dolomite Tunnel. Earth Science, 49(8): 2813-2825. doi: 10.3799/dqkx.2023.059

Citation:

Dong Jiaxing, Gong Xinyue, Mi Jian, Fan Kaiyuan, Yang Runxue, Zhao Yongchuan, Mu Hongyuan, Zhou Lunshun, 2024. Structure and Application of SHF Classification Method for Surrounding Rock of Sandy Dolomite Tunnel. Earth Science, 49(8): 2813-2825. doi: 10.3799/dqkx.2023.059

Citation:

Dong Jiaxing, Gong Xinyue, Mi Jian, Fan Kaiyuan, Yang Runxue, Zhao Yongchuan, Mu Hongyuan, Zhou Lunshun, 2024. Structure and Application of SHF Classification Method for Surrounding Rock of Sandy Dolomite Tunnel. Earth Science, 49(8): 2813-2825. doi: 10.3799/dqkx.2023.059

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Structure and Application of SHF Classification Method for Surrounding Rock of Sandy Dolomite Tunnel

doi: 10.3799/dqkx.2023.059

1.
Faculty of Electric Power Engineering, Kunming University of Science and Technology, Kunming 650500, China
2.
Yunnan Institute of Water & Hydropower Engineering Investigation, Design and Research, Kunming 650021, China
3.
Central Yunnan Water Diversion Construction Administration Bureau, Kunming 650000, China

Received Date: 2023-03-21
Available Online: 2024-08-27
Publish Date: 2024-08-25

Abstract

Abstract

Sandy dolomite is widely distributed in the southwest of China. When tunnels are built in this stratum, geological disasters such as face collapse, water inrush and sand gushing often occur. Therefore, the problem of sandy dolomite faced in the construction of water diversion project in central Yunnan has attracted much attention. The sanding grade and groundwater conditions are the key factors to control the failure mode and stability of the surrounding rock of the sanded dolomite tunnel. However, these factors are often not fully considered in the traditional surrounding rock classification methods, such as the rock strength is not considered in the Q system, the ground stress is not considered in the RMR method, and the joint state and roughness of the sandy dolomite are not considered in the BQ method. Totally, these classification methods do not take into account the influence of sanding grade. In order to make the surrounding rock classification results of the sandy dolomite tunnel more accurate and faster, it is necessary to build a classification method suitable for the sandy dolomite tunnel. Based on the water diversion project in central Yunnan under construction, we analyze the applicability of traditional methods such as Q method, RMR method, RMi method, GSI method and BQ method in sandy dolomite tunnel. Secondly, combined with the engineering characteristics of sandy dolomite and the external environmental factors, the surrounding rock classification system SHF with the evaluation indexes of sanding grade, structural plane state, groundwater, main structural plane state and ground stress is constructed, and the SHF classification method is verified and applied by selected typical tunnel sections of the project. The established classification method SHF for surrounding rock of sandy dolomite tunnel is prone to operate and highly consistent with the actual situation of the project. The research can provide a theoretical basis for the design and construction of sanded dolomite tunnel support.
- sandy dolomite stratum,
- SHF method for surrounding rock mass classification,
- Sanding grade,
- underground water,
- water diversion project in Central Yunnan

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References(43)

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Structure and Application of SHF Classification Method for Surrounding Rock of Sandy Dolomite Tunnel

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