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Preparation method of post-grouting steel pipe pile with local pile diameter enlarged
The invention discloses a preparation method of a post-grouting steel pipe pile with the local pile diameter enlarged. The method comprises the specific procedures of machining and manufacturing of a steel pipe pile body, a slurry bag, reinforcing steel bars and other accessories, pile pressing, pile splicing, pile sinking in place, grouting equipment installation, grouting (including first-stage gravity grouting and second-stage pressure grouting), static curing, steel bar welding and concrete pouring. According to the method, the steel pipe pile is pressed into a soil layer, after two-stage grouting, under the action of internal pressure, an annular slurry bag generates transverse deformation, the size is enlarged, local pile diameter enlargement is formed, the bearing capacity of a single pile is improved, the grouting direction is controllable, and the defects that the grouting direction of a traditional grouting steel pipe pile is difficult to control, and slurry leakage is serious are overcome; in addition, reinforcing steel bars are arranged in the slurry bags and connected with the pile body, the vertical shear bearing capacity of the pile diameter expanding part is improved, connection of the local expanding part and the pile body is enhanced, and the bearing performance is remarkably improved.
本发明公开了一种局部桩径扩大的后注浆钢管桩的制备方法，具体工序包括钢管桩桩身和浆液囊以及加强钢筋等配件的加工制作、压桩、接桩、沉桩到位、注浆设备安装、注浆(包括第一阶段重力注浆和二阶段压力注浆)、静止养护、钢筋焊接和浇筑混凝土。本发明采用先将钢管桩压入土层中，经两阶段注浆后在内部压强作用下，环状浆液囊向产生横向变形体积扩大，形成局部桩径扩大提高单桩承载力，注浆方向可控，弥补了传统注浆钢管桩注浆方向难以控制、跑浆严重等缺陷；此外，浆液囊内设置加强钢筋与桩身连接，提高扩大桩径部分的竖向抗剪承载力，加强局部扩大部分与桩身的连接，显著提高承载性能。
Preparation method of post-grouting steel pipe pile with local pile diameter enlarged
The invention discloses a preparation method of a post-grouting steel pipe pile with the local pile diameter enlarged. The method comprises the specific procedures of machining and manufacturing of a steel pipe pile body, a slurry bag, reinforcing steel bars and other accessories, pile pressing, pile splicing, pile sinking in place, grouting equipment installation, grouting (including first-stage gravity grouting and second-stage pressure grouting), static curing, steel bar welding and concrete pouring. According to the method, the steel pipe pile is pressed into a soil layer, after two-stage grouting, under the action of internal pressure, an annular slurry bag generates transverse deformation, the size is enlarged, local pile diameter enlargement is formed, the bearing capacity of a single pile is improved, the grouting direction is controllable, and the defects that the grouting direction of a traditional grouting steel pipe pile is difficult to control, and slurry leakage is serious are overcome; in addition, reinforcing steel bars are arranged in the slurry bags and connected with the pile body, the vertical shear bearing capacity of the pile diameter expanding part is improved, connection of the local expanding part and the pile body is enhanced, and the bearing performance is remarkably improved.
本发明公开了一种局部桩径扩大的后注浆钢管桩的制备方法，具体工序包括钢管桩桩身和浆液囊以及加强钢筋等配件的加工制作、压桩、接桩、沉桩到位、注浆设备安装、注浆(包括第一阶段重力注浆和二阶段压力注浆)、静止养护、钢筋焊接和浇筑混凝土。本发明采用先将钢管桩压入土层中，经两阶段注浆后在内部压强作用下，环状浆液囊向产生横向变形体积扩大，形成局部桩径扩大提高单桩承载力，注浆方向可控，弥补了传统注浆钢管桩注浆方向难以控制、跑浆严重等缺陷；此外，浆液囊内设置加强钢筋与桩身连接，提高扩大桩径部分的竖向抗剪承载力，加强局部扩大部分与桩身的连接，显著提高承载性能。
Preparation method of post-grouting steel pipe pile with local pile diameter enlarged
一种局部桩径扩大的后注浆钢管桩的制备方法
CHENG JINGE (author) / SONG MINGZHI (author) / LYU XIUBO (author) / ZUO YUHANG (author) / LIU XIANG (author) / CHEN XIN (author) / CHEN LINZHI (author) / ZHANG ZHIYANG (author) / WANG XINYUAN (author) / CHEN LIMIN (author)
2023-09-05
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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