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A platform for research: civil engineering, architecture and urbanism
Annular grouting method suitable for treatment of underlying goaf of pile foundation
The invention relates to the technical field of municipal engineering foundation reinforcement, and discloses an annular grouting method suitable for pile foundation underlying goaf treatment, which comprises the following steps: selecting a middle pile in a pile foundation, and drilling a hole from the ground to a goaf cavity to obtain a middle pile formed hole; the annular bag is lowered to a goaf cavity through a middle pile hole by means of a grouting pipe; the outer ring of the annular bag is grouted until the annular bag expands to be attached to the top face and the bottom face of the goaf cavity, and an annular closed curtain is formed; the cylinder of the inner cavity of the annular bag is grouted to form a cylindrical reinforcing body; according to the method, the hole is drilled from the ground to the goaf cavity at the position of the middle pile, the annular bag is put down through the hole formed in the middle pile, under the condition that the annular bag is completely expanded, the annular bag can be completely attached to the top and the bottom of the goaf cavity, and the annular closed curtain is formed. The annular closed curtain can act together with the annular bag wall, so that slurry overflowing is controlled, and finally pressure grouting of the cylindrical reinforcing body is achieved.
本发明涉及市政工程基础加固技术领域，公开了一种适用于桩基础下伏采空区治理的环形注浆方法，包括：选取桩基础中的中桩，由地面钻进成孔至采空区空洞获得中桩成孔；利用注浆管将环形囊通过中桩成孔下放至采空区空洞；对环形囊的外环注浆，直到环形囊膨胀到与采空区空洞的顶面和底面贴合，形成环形封闭帷幕；对环形囊内腔的圆柱体进行注浆，形成圆柱加固体；本发明通过在中桩位置由地面钻进成孔至采空区空洞，通过中桩成孔下放环形囊，在环形囊完全膨胀条件下，能够实现环形囊与采空区空洞顶部、底部的完全贴合，形成环形封闭帷幕。环形封闭帷幕能与环形囊壁共同作用，从而控制浆液漫流，最终实现圆柱加固体的压力注浆。
Annular grouting method suitable for treatment of underlying goaf of pile foundation
The invention relates to the technical field of municipal engineering foundation reinforcement, and discloses an annular grouting method suitable for pile foundation underlying goaf treatment, which comprises the following steps: selecting a middle pile in a pile foundation, and drilling a hole from the ground to a goaf cavity to obtain a middle pile formed hole; the annular bag is lowered to a goaf cavity through a middle pile hole by means of a grouting pipe; the outer ring of the annular bag is grouted until the annular bag expands to be attached to the top face and the bottom face of the goaf cavity, and an annular closed curtain is formed; the cylinder of the inner cavity of the annular bag is grouted to form a cylindrical reinforcing body; according to the method, the hole is drilled from the ground to the goaf cavity at the position of the middle pile, the annular bag is put down through the hole formed in the middle pile, under the condition that the annular bag is completely expanded, the annular bag can be completely attached to the top and the bottom of the goaf cavity, and the annular closed curtain is formed. The annular closed curtain can act together with the annular bag wall, so that slurry overflowing is controlled, and finally pressure grouting of the cylindrical reinforcing body is achieved.
本发明涉及市政工程基础加固技术领域，公开了一种适用于桩基础下伏采空区治理的环形注浆方法，包括：选取桩基础中的中桩，由地面钻进成孔至采空区空洞获得中桩成孔；利用注浆管将环形囊通过中桩成孔下放至采空区空洞；对环形囊的外环注浆，直到环形囊膨胀到与采空区空洞的顶面和底面贴合，形成环形封闭帷幕；对环形囊内腔的圆柱体进行注浆，形成圆柱加固体；本发明通过在中桩位置由地面钻进成孔至采空区空洞，通过中桩成孔下放环形囊，在环形囊完全膨胀条件下，能够实现环形囊与采空区空洞顶部、底部的完全贴合，形成环形封闭帷幕。环形封闭帷幕能与环形囊壁共同作用，从而控制浆液漫流，最终实现圆柱加固体的压力注浆。
Annular grouting method suitable for treatment of underlying goaf of pile foundation
一种适用于桩基础下伏采空区治理的环形注浆方法
JUNG CHAN-JUNG (author) / LIU JIAHAI (author) / FU YANG (author) / DONG YANAN (author)
2023-12-29
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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