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A platform for research: civil engineering, architecture and urbanism
Construction method of high-pressure jet grouting pile in water-rich round gravel stratum
The invention discloses a construction method of a high-pressure jet grouting pile in a water-rich round gravel stratum. The construction method comprises the steps of S1, adjusting a high-pressure spraying process, S2, conducting ground trial spraying and S3, starting a drilling machine to perform the construction operation of the jet grouting pile, wherein the adjustment of the high-pressure spraying process comprises the substeps that S1.1, the slurry spraying pressure is adjusted, and the slurry spraying pressure is changed to 15-20 MPa; S1.2, the distance between a water spraying openingand a slurry spraying opening is adjusted, and the distance between the water spraying opening and the slurry spraying opening is changed to 400 mm; S1.3, a grouting hole at the bottom of a spraying pipe is adjusted, and the grouting hole at the bottom of the spraying pipe is opened in the side edge of a drill bit; and S1.4, the stirring diameter of the drill bit is adjusted, and the stirring diameter of the drill bit at the bottom of the spraying pipe is changed to 300 mm. According to the construction method of the high-pressure jet grouting pile in the water-rich round gravel stratum, an effective anti-seepage pile body can be formed, the leakage problem of a gap between retaining piles is reduced, and the purposes of seepage prevention, leakage stoppage and reinforcement of a foundation pit are achieved.
本发明公开一种富水圆砾地层高压旋喷桩施工方法，包括：步骤1，调整高压喷射工艺；步骤1.1，调整喷浆压力，更改喷浆压力至15‑20MPa；步骤1.2，调整喷水口和喷浆口的间距，更改喷水口和喷浆口之间的间距为400mm；步骤1.3，调整喷射管底部的注浆孔，将喷射管底部的注浆孔开设在钻头的侧边；步骤1.4，调整钻头的搅拌直径，将喷射管底端钻头的搅拌直径更改至300mm；步骤2，地面试喷；步骤3，启动钻机进行旋喷桩施工的施工作业。本发明所述富水圆砾地层高压旋喷桩施工方法能形成有效防渗桩体，减少围护桩间隙的渗漏问题，达到基坑防渗堵漏和加固的目的。
Construction method of high-pressure jet grouting pile in water-rich round gravel stratum
The invention discloses a construction method of a high-pressure jet grouting pile in a water-rich round gravel stratum. The construction method comprises the steps of S1, adjusting a high-pressure spraying process, S2, conducting ground trial spraying and S3, starting a drilling machine to perform the construction operation of the jet grouting pile, wherein the adjustment of the high-pressure spraying process comprises the substeps that S1.1, the slurry spraying pressure is adjusted, and the slurry spraying pressure is changed to 15-20 MPa; S1.2, the distance between a water spraying openingand a slurry spraying opening is adjusted, and the distance between the water spraying opening and the slurry spraying opening is changed to 400 mm; S1.3, a grouting hole at the bottom of a spraying pipe is adjusted, and the grouting hole at the bottom of the spraying pipe is opened in the side edge of a drill bit; and S1.4, the stirring diameter of the drill bit is adjusted, and the stirring diameter of the drill bit at the bottom of the spraying pipe is changed to 300 mm. According to the construction method of the high-pressure jet grouting pile in the water-rich round gravel stratum, an effective anti-seepage pile body can be formed, the leakage problem of a gap between retaining piles is reduced, and the purposes of seepage prevention, leakage stoppage and reinforcement of a foundation pit are achieved.
本发明公开一种富水圆砾地层高压旋喷桩施工方法，包括：步骤1，调整高压喷射工艺；步骤1.1，调整喷浆压力，更改喷浆压力至15‑20MPa；步骤1.2，调整喷水口和喷浆口的间距，更改喷水口和喷浆口之间的间距为400mm；步骤1.3，调整喷射管底部的注浆孔，将喷射管底部的注浆孔开设在钻头的侧边；步骤1.4，调整钻头的搅拌直径，将喷射管底端钻头的搅拌直径更改至300mm；步骤2，地面试喷；步骤3，启动钻机进行旋喷桩施工的施工作业。本发明所述富水圆砾地层高压旋喷桩施工方法能形成有效防渗桩体，减少围护桩间隙的渗漏问题，达到基坑防渗堵漏和加固的目的。
Construction method of high-pressure jet grouting pile in water-rich round gravel stratum
富水圆砾地层高压旋喷桩施工方法
LI JIANXIN (author) / FENG BO (author)
2020-06-12
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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