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采用裂隙动水注浆设备结合正交试验设计进行了裂隙动水注浆模型试验,获得了渗流压力场与注浆效果和注浆工艺之间的相关关系。结果表明,裂隙动水注浆的渗流压力场包括单峰型、平台型、多峰型、阶梯型4种类型;出现平台型和多峰型渗流压力场时的注浆堵水效果好,而出现阶梯型渗流压力场时的注浆堵水效果差;为了获得好的注浆效果且节约浆液,在渗流压力场为单峰型时应该适量增加注浆量;而在渗流压力场为平台型或多峰型时应该适量减小注浆量;渗流压力场为阶梯型时应该调节浆液配比,缩短凝胶时间。研究结果对应用压力监测及时控制施工质量和调整注浆工艺有指导作用。
The fractured hydrodynamic grouting model test was conducted by using the fractured hydrodynamic grouting equipment combined with the orthogonal experimental design. The correlation between seepage pressure field, grouting effect and grouting technology was obtained. The results show that the seepage pressure field of the fractured dynamic water grouting includes four types of single peak, platform type, multi-peak type and ladder type. The grouting and plugging effect is good when the platform type and multi-peak type seepage pressure field appear In the case of stepped seepage pressure field, the grouting effect is poor; in order to obtain good grouting effect and save slurry, the amount of grouting should be increased appropriately when the seepage pressure field is unimodal; while when the seepage pressure field is plateau Or multi-peak type should be appropriate to reduce the amount of grouting; seepage pressure field ladder should adjust the slurry ratio, shorten the gel time. The results of the study on the application of pressure monitoring in time to control the construction quality and adjust the grouting process has a guiding role.