Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention discloses a construction method for weakening or eliminating soil squeezing stress of a tubular pile. A drill rod extends into an inner hole of the tubular pile to be vertically positioned; clockwise rotating the drill rod; when the pipe pile enters the designed force holding depth, pressing of the pipe pile is stopped, the drill rod continues to rotate clockwise and extends downwards, and when the stirring head is screwed out of a pipe opening in the bottom of the pipe pile by 10-20 cm, the drill rod begins to rotate anticlockwise; when the telescopic stirrer descends to the set depth of the expanded area, sinking is stopped, after the telescopic stirrer anticlockwise rotates for 30 s to break the ground, a slurry channel is opened, and a water hard cementing material is sprayed under pressure; then the drill rod is lifted while rotating; when the drill rod is lifted to the position 10-20 cm away from the bottom opening of the pipe pile, the drill rod is rotated clockwise, the drill rod is continuously lifted upwards, and continuous guniting is conducted; if a muddy soil layer is encountered, guniting is changed into powder spraying; the original operation is continued, the lifting speed is slowed down when the distance from the pile top is 1 m, and low-pressure grout supplementing is conducted till an upper pipe opening. According to the method, the soil squeezing effect of the outer wall of the pipe pile and the soil plugging effect in the pipe pile can be eliminated.
一种减弱或消除管桩挤土应力的施工方法，将钻杆伸入管桩内孔垂直定位；顺时针旋转钻杆；在管桩进入持力设计的深度时，停压管桩，钻杆继续顺时针旋转向下伸入，直至搅拌头旋出管桩底部的管口10至20CM时，开始逆时针旋转钻杆；当可伸缩搅拌器下行至扩大区域的设定深度时，停止下沉，逆时针旋转30s破土后，开启浆液通道，压力喷出水硬性胶凝材料；再边旋转边提升钻杆；钻杆提升至距管桩底口10至20CM时，顺时针旋转钻杆，持续上提钻杆和连喷浆；若遇到淤泥质土层，则将喷浆改为喷粉；继续原操作，在距桩顶1米时减慢提升速度，低压补浆，直至上管口。本发明可消除管桩外壁的“挤土效应”和管桩内部的“土塞效应”。
The invention discloses a construction method for weakening or eliminating soil squeezing stress of a tubular pile. A drill rod extends into an inner hole of the tubular pile to be vertically positioned; clockwise rotating the drill rod; when the pipe pile enters the designed force holding depth, pressing of the pipe pile is stopped, the drill rod continues to rotate clockwise and extends downwards, and when the stirring head is screwed out of a pipe opening in the bottom of the pipe pile by 10-20 cm, the drill rod begins to rotate anticlockwise; when the telescopic stirrer descends to the set depth of the expanded area, sinking is stopped, after the telescopic stirrer anticlockwise rotates for 30 s to break the ground, a slurry channel is opened, and a water hard cementing material is sprayed under pressure; then the drill rod is lifted while rotating; when the drill rod is lifted to the position 10-20 cm away from the bottom opening of the pipe pile, the drill rod is rotated clockwise, the drill rod is continuously lifted upwards, and continuous guniting is conducted; if a muddy soil layer is encountered, guniting is changed into powder spraying; the original operation is continued, the lifting speed is slowed down when the distance from the pile top is 1 m, and low-pressure grout supplementing is conducted till an upper pipe opening. According to the method, the soil squeezing effect of the outer wall of the pipe pile and the soil plugging effect in the pipe pile can be eliminated.
一种减弱或消除管桩挤土应力的施工方法，将钻杆伸入管桩内孔垂直定位；顺时针旋转钻杆；在管桩进入持力设计的深度时，停压管桩，钻杆继续顺时针旋转向下伸入，直至搅拌头旋出管桩底部的管口10至20CM时，开始逆时针旋转钻杆；当可伸缩搅拌器下行至扩大区域的设定深度时，停止下沉，逆时针旋转30s破土后，开启浆液通道，压力喷出水硬性胶凝材料；再边旋转边提升钻杆；钻杆提升至距管桩底口10至20CM时，顺时针旋转钻杆，持续上提钻杆和连喷浆；若遇到淤泥质土层，则将喷浆改为喷粉；继续原操作，在距桩顶1米时减慢提升速度，低压补浆，直至上管口。本发明可消除管桩外壁的“挤土效应”和管桩内部的“土塞效应”。
Construction method for weakening or eliminating soil squeezing stress of tubular pile
一种减弱或消除管桩挤土应力的施工方法
YU YAN (Autor:in)
18.11.2022
Patent
Elektronische Ressource
Chinesisch
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