摘要
研究目的:在隧道开挖过程中,增强对不良地质的超前判识和综合预测具有重要的工程指导意义。基于宏观地质与水文地质分析,本文研究隧道不良地质风险判识方法,聚焦高地应力下岩爆、突泥涌水、软岩变形、高温热害等问题划分风险等级,并以高温热害预报为例验证方法准确性。研究结论:(1)超前地质预报需加强宏观地质和水文地质分析,注重地面与洞内结合、物探与钻探结合、不同物探方法的结合、长短距离预报的结合,本文建立的不良地质判识方法具有创新性和科学性;(2)单一预报方法是“盲人摸象”,只能揭示局部地质情况,运用综合预报手段可加深对不良地质的全面认识,减少多解性,实际使用中不能将多个异常简单叠加,需注意各方法对地质问题的敏感性;(3)超前地质预报是施工安全的重要保障,采用有效风险判识方法有助于防范各类事故,须纳入施工工序管理;(4)本文研究可为隧道不良地质的超前判识和类似工程提供借鉴。
Research purposes:During the tunnel excavation process,enhancing the advanced identification and comprehensive prediction of adverse geological conditions has significant engineering guiding significance.Based on macroscopic geological and hydrogeological analysis,a risk identification method for adverse geology in tunnels has been established.The risk levels are classified focusing on issues such as rock bursts under high ground stress,mud inrushes and water gushes,soft rock deformations,and high-temperature thermal hazards.The accuracy of the method is verified by taking the prediction of high-temperature thermal hazards as an example.Research conclusions:(1)For advanced geological prediction,it is necessary to strengthen macroscopic geological and hydrogeological analysis,and pay attention to the combination of ground and tunnel interior,the combination of geophysical exploration and drilling,the combination of different geophysical exploration methods,and the combination of long-distance and short-distance predictions.The adverse geology identification method established in this paper is innovative and scientific.(2)A single prediction method is like"a blind man feeling an elephant",which can only reveal local geological conditions.Using comprehensive prediction means can deepen the overall understanding of adverse geology and reduce ambiguity.In practical applications,multiple anomalies should not be simply superimposed,and attention should be paid to the sensitivity of each method to geological problems.(3)Advanced geological prediction is an important guarantee for construction safety.Adopting effective risk identification methods helps to prevent the occurrence of various accidents and should be incorporated into the management of construction procedures.(4)This research can provide reference for the advanced identification of adverse geological conditions in tunnels and similar projects.
作者
许广春
刘伟
张凤凯
宋树宝
XU Guangchun;LIU Wei;ZHANG Fengkai;SONG Shubao(Southwest Jiaotong University,Chengdu,Sichuan 610000,China;China Railway Design Corporation,Tianjin 300251,China;Shandong University,Jinan,Shandong 250061,China;China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)
出处
《铁道工程学报》
北大核心
2025年第7期19-25,共7页
Journal of Railway Engineering Society
基金
创新中心基金项目(TICSTR-2024-II-003CZTL)。
关键词
铁路隧道
岩爆
突泥涌水
大变形
高地温
判识方法
railway tunnel
rock burst
mud and water inrush
large deformation
high ground temperature
identification method
