富水破碎带突水突泥的超前地质预报和注浆防治技术在羊仓岩Ⅱ号隧道的应用研究

发布时间：2018-03-20 09:39

  本文选题：富水破碎带　切入点：突水突泥　出处：《山东大学》2017年硕士论文　论文类型：学位论文

【摘要】：突水突泥是隧道建设过程中的重大灾害,往往会造成严重的人员伤亡和经济损失。因此,系统的研究引发突水突泥灾害的地质特征,并总结针对富水破碎带型突水突泥的超前地质预报技术和灾害防治技术对隧道施工安全和灾害防治具有很大实用价值。本文通过对突水突泥灾害定义和类型的分析,表明导致隧道突水突泥灾害发生的首要因素是地质因素,其次是水文和工程因素。富水断层破碎带和充水溶洞是导致灾害发生的首要原因,所以为了防止灾害发生需要在隧道施工过程中进行超前地质预报并及时采取超前注浆等处治措施。本文对地震波法中的TSP技术和短期预报常用的地质雷达预报技术的理论原理、预报流程和结果解译判断准则进行了阐述,重点研究了富水不良地质体在不同预报方法探测结果中的表现形式和响应特征,并结合其各自的特点和适应范围的基础上建立了“地质勘查+TSP+地质雷达+超前钻探”的综合超前地质预报的体系。以此体系为基础在羊仓岩Ⅱ号隧道中将几种超前预报技术进行了组合应用,揭示了隧道施工中遇到的不良地质,通过开挖资料与预报结果分析,证明综合超前预报模式的准确率和可靠性。本文对注浆方案的设计、注浆过程的实施和注浆效果的评价进行了总结。堵水注浆方案有全断面超前预注浆、周边帷幕注浆浆等,加固的范围要考虑注浆段长度、注浆扩散半径和注浆孔布置间距三个方面。注浆实施时,注浆准备工作一般从止浆墙施作、引流排水和加强支护三个方面展开,注浆效果的评价具体来说有物探法、参数分析法、检查孔法、开挖取样法和变形监测法等。结合羊仓岩Ⅱ号隧道某段富水破碎带进行全断面超前预注浆应用,制定了大跨度隧道全断面预注浆堵水技术的设计方案及施工技术,注浆后通过开挖验证,掌子面稳定性明显改善,围岩渗透率降低,证明实施方案可有效的对该富水破碎带进行加固,可以较好的为类似地质条件隧道施工中的灾害治理方案设计提供参考。
[Abstract]:Water and mud inrush is a major disaster in the process of tunnel construction, which often results in serious casualties and economic losses. It is concluded that the advanced geological prediction technology and disaster prevention technology for water-rich broken zone type of water inrush mud have great practical value for tunnel construction safety and disaster prevention. This paper analyzes the definition and type of water-inrush mud disaster. The results show that geological factors are the primary factors leading to the water inrush and mud inrush in tunnels, and the hydrological and engineering factors are the second. The fracture zone of water-rich faults and water-filled caverns are the primary causes of the disasters. Therefore, in order to prevent disasters, it is necessary to carry out advanced geological prediction in the course of tunnel construction and to take timely treatment measures such as advance grouting. This paper deals with the theoretical principles of the TSP technique in seismic wave method and the geological radar prediction technology commonly used in short-term prediction. The prediction process and the criterion of interpretation and judgment of the results are expounded, and the forms and response characteristics of the poor geological bodies with rich water in the detection results of different prediction methods are studied. Combined with their respective characteristics and adaptive scope, the comprehensive advanced geological prediction system of "geological exploration TSP geological radar advanced drilling" is established. Based on this system, several kinds of advanced geological prediction systems are developed in Yangcanyan 鈪，

本文编号：1638520