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水平巷道掘进时,经过具有不同倾角的含水层、沉积层,巷道将贯穿每一层位的顶板和底板。图1即为上述情况下水平巷道掘进时注浆工程实例。注浆液是经过钻孔注入开度大的倾斜或陡直的裂缝。这时,正如注浆及地质勘探管理局所进行的实验研究所表明:浆液在重力作用下沿斜向移动并到达含水层底板,形成梯形(见图1a.б)或三角形(见图1B·г)棱体隔水帷幕。在裂隙中注入浆液的自由面所组成的倾角为天然坡度角或自然倾斜角β,可按式(1)计算
In horizontal tunneling, the aquifers, sediments and roadways with different inclinations will run through the roof and floor of each floor. Figure 1 is the case of horizontal tunneling grouting engineering examples. Grouting is through the hole into the opening of a large tilt or steep cracks. At this time, as the experimental study conducted by the Grouting and Geological Exploration Administration shows, the slurry moves diagonally under gravity and reaches the aquifer floor forming a trapezoid (see Figure 1a.b) or a triangle (see Figure 1B · г Prism waterproof curtain. The angle of inclination composed of the free surface of the slurry injected into the fracture is a natural slope angle or a natural inclination angle β, which can be calculated according to the formula (1)