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旋喷扩大头锚索是一种新型锚索结构,该工艺操作简便,成孔质量好,施工速度快,可靠性高,节约工程造价;由于其采用高压成孔注浆工艺,能够在软弱土层中应用,有效避免了常规锚索成孔困难、注浆不饱满、锚固力不足等缺点;只要保证扩大头设置时进入稳定地层一定深度,就能提供较大的锚固力,从而大大缩短锚索总长度;在锚固段长度相同的条件下,旋喷扩大头锚索承载力约为二次劈裂注浆锚索承载力的2.5倍。可为本地区旋喷扩大头锚索的工程应用提供借鉴。
Spinning and expanding the head anchor cable is a new type of anchor cable structure, which has the advantages of simple operation, good hole forming quality, fast construction speed, high reliability and cost saving of the project; due to the high-pressure grouting hole grouting process, Layer, it can effectively avoid the shortcomings of conventional anchor cable such as difficult hole formation, incomplete grouting and insufficient anchoring strength. As long as the anchor head can be set to a stable depth, it can provide greater anchoring force and greatly shorten the anchor The total length of cable; under the condition of the same length of anchor segment, the carrying capacity of anchor bolt of swirl-jet expansion head is about 2.5 times of that of secondary split grouting. It can provide references for the engineering application of swirl spray head expanding in this area.