土石分层介质注浆扩散的试验研究

为了探索土石分层介质中的注浆扩散规律，设计一套分层介质注浆试验装置，开展土石分层介质注浆试验研究.通过分析浆脉分布特征、注浆压力变化特征和界面加固体渗透特征，分析浆液在土石分层介质中的扩散模式及其加固效果.讨论现有注浆理论对求解分层介质注浆扩散问题的适用性，提出针对土石分层介质灾害治理工程的注浆控制方法.研究结果表明：分层界面两侧介质不同的被注时序响应浆液不同的穿层路径，分层介质的层间突变性导致浆液发生渗透-界面式、劈裂-渗透式和渗透-界面-劈裂式这3种不同的扩散模式，分别对应界面浆脉黏结、贯穿浆脉连接和并行浆脉架构3种加固特征；提出注浆材料动态调节、同孔多序梯度注浆和分层界面控域注浆3种土石分层介质注浆控制方法.
Abstract: A grouting model test device for layered medium was designed to conduct the test research of rock and soil layered medium in order to explore the grouting diffusion regular of rock and soil layered medium. The grouting diffusion laws and reinforcement mode were analyzed according to analyzing the characteristics of grouting veins, the grouting pressure and the permeability of interface solid. The applicability of current grouting theories for all diffusion modes of layered medium was discussed. Grouting control methods for the engineering of rock and soil layered medium were presented. Results showed that different grouted spatial orders for both sides medium of layered interface corresponded to different crossing layer path. The diffusion modes including penetration-interface, fracture-penetration and penetration-interface-fracture appeared in the process of grouting diffusion in layered medium because of mutability between rock and soil. The three diffusion modes corresponded to the bonding effect of interface veins, the interconnect effect of transfixion veins and the skeleton effect of paratactic veins. The grouting control methods of materials dynamic adjustment, multi-order gradient grouting and interface control domain grouting were proposed.