高地应力硬岩下双孔并行隧道相似模型试验及数值模拟

发布时间：2018-04-17 16:50

本文选题：双孔并行隧道 + 相似材料模型　；参考：《工程科学学报》2017年05期

【摘要】：基于相似模拟理论,通过试验台架设计、监测系统设计、加载系统设计和岩体模型制作等流程,完成了双孔并行隧道模型试验系统的研制工作;试验中实时监控模型各关键位置的位移变化、应力变化及隧道岩壁破坏情况.研究表明,试验观测结果与基于Mohr-Coulomb模型所得数值模拟结果相对误差较大,而基于Plastic-Hardening模型进行数值模拟计算时,所得岩土体屈服状态和变化规律与相似模型试验结果吻合度较高.综合各方面分析研究结果,认为Plastic-Hardening模型能够更为精确合理的反映实际工程及试验中岩土体状态的真实变化情况,可为相似地质条件下的双孔并行隧道施工及维护提供重要参考.
[Abstract]:Based on the theory of similarity simulation, through the design of test stand, monitoring system, loading system and rock mass model, the development of two-hole parallel tunnel model test system is completed.The displacement change, stress change and rock wall failure of the tunnel are monitored in real time.The results show that the relative error between the experimental results and the numerical simulation results based on Mohr-Coulomb model is large, but the yield state and variation law of rock and soil mass obtained by Plastic-Hardening model are in good agreement with the similar model test results.By synthesizing the results of various aspects, it is concluded that the Plastic-Hardening model can more accurately and reasonably reflect the real changes of rock and soil state in actual engineering and test, and can provide an important reference for the construction and maintenance of double-hole parallel tunnels under similar geological conditions.
【作者单位】：北京科技大学金属矿山高效开采与安全教育部重点实验室;北京科技大学土木与环境工程学院;
【基金】：科技北京百名领军人才培养工程资助项目(Z151100000315014)
【分类号】：U451.5

【相似文献】