Grouting pipe reinforcing and grouting structure and construction method thereof

Abstract

The invention particularly relates to a grouting pipe reinforcing and grouting structure and a construction method thereof. The grouting structure comprises a grouting pipe, and a soil breaking mechanism arranged on the grouting pipe. The soil breaking mechanism comprises a fixed part fixedly sleeving the grouting pipe, a sliding pipe part and a soil breaking assembly, the sliding pipe part sleeves the position, above the fixed part, of the grouting pipe and is in sliding fit with the grouting pipe, and the soil breaking assembly is arranged between the fixed part and the sliding pipe part. When the sliding pipe part slides in the fixed direction, the soil breaking assembly can expand out in the axis direction away from the grouting pipe. Slurry output grooves corresponding to the positions of slurry output holes formed in the grouting pipe are formed in the outer surface of the sliding pipe part. The invention correspondingly discloses the construction method of the grouting structure. According to the grouting pipe reinforcing and grouting structure and the construction method thereof, the slurry output size of the grouting pipe can be increased, and therefore slurry output by the grouting pipe can permeate into the soil layer around the pipe, and the slurry output effect of the grouting pipe and the connecting stability of the grouting pipe and the soil layer around the pipecan be improved.

Description

technical field [0001] The invention relates to the technical field of steel pipe grouting, in particular to a grouting pipe reinforcement grouting structure and a construction method thereof. Background technique [0002] In recent years, the reinforcement and transformation of existing buildings and structures has received great attention at home and abroad, and has developed into a new discipline. However, most of the existing building foundation reinforcement is involved in the functional transformation and storey addition of existing buildings, or in the treatment of building diseases such as sinking, cracking, and tilting. Engineering practice shows that the preloaded pile foundation underpinning method is a simple and effective foundation reinforcement method for existing buildings. Common preloaded underpinning piles include reinforced concrete underpinning piles and steel pipe preloaded underpinning piles. Wait. [0003] In the actual construction process, for bui...

AI Technical Summary

Problems solved by technology

[0005] However, in the actual construction process, the existing grouting pipe reinforcement grouting structure also has the following problems: when the grouting pipe is injected into the pre-injection hole, the outer peripheral side wall of the grouting pipe and the inner wall of the pre-injection hole (perimeter of the pipe) Soil layers) are almost in a state of bonding, that is, the distance between the grouting pipe and the pre-casting hole is very small, so that the grout that can be filled is very limited, and the effect of the grouting pipe outputting grout is not good. It is difficult for the slurry to support the grouting pipe well, resulting in poor bearing effect of the grouting pipe

In addition, when the grouting pipe is injected into the pre-injection hole, the outer peripheral side wall of the grouting pipe and the inner wall of the pre-injection hole are in a state of "surface contact", so that the slurry output by the grouting pipe cannot penetrate into the soil layer around the pipe. , it cannot produce greater friction, making the connection stability between the grouting pipe and the surrounding soil layer poor, which also leads to poor bearing effect of the grouting pipe

Images