劈裂注浆扩散半径及压力衰减分析

Penetration radius and pressure attenuation law in fracturing grouting

本文假设浆液在裂缝中的流动符合达西定律,劈裂注浆在土体中形成的裂缝宽度为均匀裂缝宽度,推导出劈裂注浆的注浆压力沿裂缝长度的衰减规律以及裂缝在土体中的扩散规律,并用数值分析的结果证明了这些规律的可靠性。随后分析了多孔注浆时的相互影响,得出最优注浆孔数量及其布置方式,同时推导出多孔同时注浆时各个主流线上注浆压力的大小以及此时的浆液扩散半径。

On the assumption that the grouting flow in soil fracture accords with Darcy＇s law and the fracture widths in soil formed by fracturing grouting is evenly distributed, the attenuation law of pressure and the fracture pervasion along the penetrating radius direction are deduced. The validity of this assumption is verified by numerical analysis. The interaction among multiple grouting bores is investigated and the optimal amount and the reasonable arrangement of grouting bores are studied. The magnitude of grouting pressure along the main grouting flow paths and corresponding penetration radii during simultaneous grouting of multiple bores are further deduced.