A Study of the Coupled Hydraulic-Mechanical Behavior of Jointed Rock Masses

本课题的研究结果将为压力隧洞的合理设计提供定量依据，并揭示节理岩体水力顶进过程中发生的基本水力学相互作用。这些结果还将有助于在项目早期根据观测到的地质数据估计流入地下洞口的水量。对节理岩体的脱水和补给流态进行建模，以评估节理的流体力学特性以及节理的姿态和间距对计算的隧道入渗速率或岩体入渗速率的影响。将研究水-力-岩-衬砌的耦合相互作用，以评估地形、水-力-力接头特性和衬砌加固水平对衬砌水头损失、隧道渗漏量和岩体中水力顶进的影响。

The results obtained in this project will provide needed quantitative criteria for the rational design of pressure tunnels and shed light into the fundamental hydromechanic interactions occurring during hydrojacking of jointed rock masses. The results will also aid in estimation of magnitudes of inflow into underground openings from observed geologic data early in the project. The flow regime due to dewatering and recharge of the jointed rock mass will modeled to assess the effect of the hydromechanical properties of the joints and the attitude and spacing of the joints on the computed magnitudes of infiltration rates into the tunnel or rates of exfiltrations into the masses. The coupled hydromechanical rockliner interaction will be studied to assess the effect of topography, hydromechanical joint properties and level of reinforcement in the liner, on the head loss across the liner, magnitude of exfiltrations from the tunnel and initiation of hydrojacking in the mass.