在立井开凿中,经常采用注浆法防止地下水涌向井筒。目前注浆均靠压入浆液在岩层中渗透,形成不规则的枝状和板状骨架,阻塞、挤压裂隙并隔断水源。采用这种注浆法时,浆液扩散半径难以控制,浆液的流失量较大。为克服上述缺点,最近出现了旋喷桩注浆法,日本称之为CCP注浆法。此法是用特殊的喷嘴和超高压脉 In vertical well excavation, grouting is often used to prevent groundwater from flowing to the wellbore. At present, the grouting all penetrate the grout and infiltrate into the rock formation, forming irregular branches and plate-shaped skeletons, blocking, squeezing the fractures and cutting off the water source. Using this method of grouting, the slurry diffusion radius is difficult to control, the loss of slurry larger. In order to overcome the above shortcomings, the jet grouting method recently appeared, which Japan calls the CCP grouting method. This method is to use a special nozzle and ultra-high pressure pulse