李天斌, 何怡帆, 付弦. 2019: 高地应力隧道施工期大变形动态风险评估方法及应用. 工程地质学报, 27(1): 29-37. DOI: 10.13544/j.cnki.jeg.2019-015
    引用本文: 李天斌, 何怡帆, 付弦. 2019: 高地应力隧道施工期大变形动态风险评估方法及应用. 工程地质学报, 27(1): 29-37. DOI: 10.13544/j.cnki.jeg.2019-015
    LI Tianbin, HE Yifan, FU Xian. 2019: DYNAMIC RISK ASSESSMENT METHOD AND APPLICATION OF LARGE DEFORMATION OF HIGH GROUND STRESS TUNNEL DURING CONSTRUCTION PERIOD. JOURNAL OF ENGINEERING GEOLOGY, 27(1): 29-37. DOI: 10.13544/j.cnki.jeg.2019-015
    Citation: LI Tianbin, HE Yifan, FU Xian. 2019: DYNAMIC RISK ASSESSMENT METHOD AND APPLICATION OF LARGE DEFORMATION OF HIGH GROUND STRESS TUNNEL DURING CONSTRUCTION PERIOD. JOURNAL OF ENGINEERING GEOLOGY, 27(1): 29-37. DOI: 10.13544/j.cnki.jeg.2019-015

    高地应力隧道施工期大变形动态风险评估方法及应用

    DYNAMIC RISK ASSESSMENT METHOD AND APPLICATION OF LARGE DEFORMATION OF HIGH GROUND STRESS TUNNEL DURING CONSTRUCTION PERIOD

    • 摘要: 简单实用的隧道大变形风险评估方法对灾害防治和工程应用有重要价值。本文应用指标打分法建立了高地应力隧道施工期大变形动态风险评估方法。应用指标体系打分法建立了包括地质因素、设计因素和施工因素3项一级指标和岩石强度、围岩完整性等18项二级指标的风险评估指标体系,经统计分析确定各指标影响权重。通过现场对各指标进行打分,对照大变形风险可能性等级标准,确定风险可能性等级;通过专家调查对直接经济损失、工期延误进行估计,确定严重程度等级;综合考虑风险发生可能性及损失严重程度,应用风险矩阵法得到风险等级。将所建立的风险评估方法应用于在建汶马高速公路米亚罗3号隧道,评估结果与实际开挖结果一致,验证了此套方法的有效性与实用性。该风险评估方法可为隧道施工期大变形的预防和控制提供科学依据。

       

      Abstract: A simple and practical tunnel large deformation risk assessment method is of great value for disaster prevention and engineering applications. We applied the index scoring method to establish a dynamic risk assessment method for large deformation of high ground stress tunnels during construction. Then we established a risk assessment index system of large deformation, which includes three primary indicators consisted of geological factors, design factors and construction factors, and 18 secondary indicators such as rock strength and surrounding rock integrity. Statistical analysis was used to determine the weight of each index. Through the on-site scoring of each indicator, the risk probability level was determined according to the large deformation risk probability level standard. Then we used expert surveys to estimate direct economic losses, delays in construction, and determine severity level. Considering the possibility of risk occurrence and the severity of the loss, we used the risk matrix method to obtain the risk comprehensive level. Furthermore, we applied the established risk assessment method to the Miyaluo Tunnel No. 3 in the Wenma Expressway under construction. The evaluation results were consistent with the actual excavation results, which verified the effectiveness and practicability of the method. This risk assessment method provides a scientific basis for the prevention and control of large deformation during tunnel construction.

       

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