供水隧道围岩弹性抗力参数研究

Study on Elastic Resistance Parameters of Surrounding Rock of Water Supply Tunnel

隧道作为水利工程建设中最重要的水工建筑物,越来越受到人们的重视。本文针对辽宁东部供水隧道实际工程概况,结合现场岩石力学试验,对供水隧道的岩体弹性抗力系数进行了研究分析。利用建立的数值模型及室内岩石物理学试验,得到了不同岩性下点荷载的强度及弹性波的传播速度,为岩石级别的分类提供了数值参考。并根据地下水与初始应力状态的修正值,得到了修正后的东部供水工程隧道岩石级别分类方法。最后通过对凝灰岩与石英闪长岩的变形模量与单位弹性抗力系数的研究,确定了二者间的线性关系。本研究旨在为今后隧道工程的实施提供参考。

Tunnel,as the most important hydraulic structure in the construction of water conservancy project,has received more and more attention. In the paper,site rock mechanics tests are combined for studying and analyzing the elastic resistance coefficient of rocks in the water supply tunnel aiming at actual project overview of water supply tunnels in eastern Liaoning Province. The established numerical model and indoor rock physics experimentare utilized for obtaining point load strength and elastic wave propagation velocity under different lithological characters,thereby providing value reference for classification of rock levels. The corrected eastern water supply engineering tunnel rock classification method is obtained according to the correction value of groundwater and initial stress state. Finally,the linear relation thereof is determined by studying the deformation modulus and unit elastic resistance coefficient of tuff and quartz diorite. The study aims at providing reference for implementing tunnel projects in the future.