| 岩溶隧道隔水岩盘安全厚度预测模型 |
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| 引用本文： | 徐光黎, 储汉东, 李维娜, 喻章, 刘坡拉, 汪继锋. 2016: 岩溶隧道隔水岩盘安全厚度预测模型. 工程地质学报, 24(s1): 848-854. DOI: 10.13544/j.cnki.jeg.2016.s1.122 |
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| 作者姓名： | 徐光黎 储汉东 李维娜 喻章 刘坡拉 汪继锋 |
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| 作者单位： | 1.中国地质大学工程学院 武汉 430074;;2.中铁第四勘察设计院集团有限公司 武汉 430063 |
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| 摘 要： | 岩溶隧道掌子面不采取支护措施，极易成为突水灾害的常发部位，其又为隧道施工的工作面，突水灾害势必会带来严重后果。在岩溶隧道掘进过程中，掌子面与前方含水构造间的隔水岩盘厚度留设问题非常关键，决定着突水灾害的发生与否。对掌子面前方隔水岩盘安全厚度的影响因素进行分析，认为岩盘质量与岩溶水压是主导因子。利用三维有限元方法模拟岩溶隧道开挖过程，研究隔水岩盘安全厚度与其主导因子的相关变化规律。基于非线性回归方法，提出了能简单快速预测掌子面前方隔水岩盘安全厚度的数学模型，并为工程实例所验证。该预测模型具有简易、快捷、实用等特点，为岩溶隧道隔水岩盘安全厚度的预测提供了一个为现场工程师所接受的强有力工具。
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| 关 键 词： | 岩溶隧道 掌子面隔水岩盘 有限元模拟 安全厚度预测 |
| 收稿时间： | 2016-02-25 |
| 修稿时间： | 2016-05-20 |
FORECASTING MODEL FOR SAFE THICKNESS OF SURROUNDING ROCK MASS IN KARST TUNNELS |
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| XU Guangli, CHU Handong, LI Weina, YU Zhang, LIU Pola, WANG Jifeng. 2016: FORECASTING MODEL FOR SAFE THICKNESS OF SURROUNDING ROCK MASS IN KARST TUNNELS. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 848-854. DOI: 10.13544/j.cnki.jeg.2016.s1.122 |
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| Authors: | XU Guangli CHU Handong LI Weina YU Zhang LIU Pola WANG Jifeng |
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| Affiliation: | 1.Faculty of Engineering, China University of Geosciences, Wuhan 430074;;2.China Railway Siyuan Survey & Design Group Co., Ltd., Wuhan 430063 |
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| Abstract: | Water inrush frequently occurs at karst tunnel face because there is no supporting countermeasure over here. In addition, the catastrophe can lead to serious consequences on account of tunnel face which is as the working face of tunnel project. During the process of excavation, safe thickness of surrounding rock mass between tunnel face and front karst structure is very important and determines whether water inrush happens. The affecting factors of safe thickness of surrounding rock mass are analyzed, and quality of rock mass and karst water pressure are regarded as the dominant factors. Three-dimensional finite elements method is utilized to simulate the process of tunnel excavation. As a consequence, the correlations between safe thickness of rock mass and its dominant factors are figured out. Based on non-linear regression method, the forecasting model for safe thickness of rock mass of karst tunnel face is put forward and verified by two typical case studies. A powerful tool is provided for accurately forecasting the safe thickness of rock mass, even preventing the water inrush in karst tunnel. |
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| Keywords: | Karst tunnel Surrounding rock mass Finite element simulation Forecast for safe thickness |
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