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高压旋喷注浆法是在静压化学灌浆法的基础上,引进超高压射流切割技术发展起来的,它适用于各类砂性土、粘性土、黄土、淤泥及含卵石成份不多的杂填土等软弱地基的加固。本文扼要介绍其施工方法与工程实例。一、高压旋喷注浆法施工概述高压旋喷注浆法是先钻一直径为7.5～15厘米的导孔,导孔钻至预定深度后,提出钻杆,将端头带有特殊喷嘴的注浆管送至地基土层中的预定深度,然后用高压喷射流强制切割、冲击破坏土层,使土粒剥落下来,与此同时,使旋喷管一面旋转、一面提升,使浆液与切割下来的土粒骨料搅拌混和,最后在喷射力的有效射程内形成一个圆柱状的
The high-pressure jet grouting method is based on the hydrostatic chemical grouting method. It has been developed by introducing the ultra-high pressure jet cutting technology. It is suitable for all kinds of sandy soils, cohesive soils, loess, silt and pebbles containing a small amount of impurities. Reinforcement of soft foundations such as filling. This article briefly introduces its construction methods and engineering examples. First, the construction of high-pressure rotary jet grouting method Overview High-pressure jet grouting method is to drill a diameter of 7.5 ~ 15 cm guide hole, guide hole drilled to a predetermined depth, put forward the drill pipe, the tip with a special nozzle The grouting pipe is sent to a predetermined depth in the foundation soil, and then the high-pressure jet is used to forcibly cut and impact the damaged soil layer so as to exfoliate the soil particles. At the same time, the rotary nozzle is rotated and lifted to make the slurry and cutting. The aggregates of the earth particles aggregated under stirring were finally formed into a cylindrical shape within the effective range of the spraying force.