A grouting pipe reinforced grouting structure and construction method thereof

Abstract

The invention specifically relates to a grouting pipe reinforcement grouting structure and a construction method thereof. The grouting structure includes a grouting pipe and a soil-breaking mechanism arranged on the grouting pipe; The fixed part of the grouting pipe is sleeved on the grouting pipe above the fixed part and the sliding pipe part is slidably matched with the grouting pipe, and the soil breaking assembly is arranged between the fixed part and the sliding pipe part; the sliding pipe part faces the fixed part When sliding in the same direction, the soil-breaking assembly can expand toward the axis away from the grouting pipe; the outer surface of the sliding pipe is also provided with a grouting groove corresponding to the position of the grouting hole set on the grouting pipe; the present invention also discloses correspondingly A construction method of grouting structure is proposed. The grouting pipe reinforcement grouting structure and its construction method in the present invention can increase the grouting volume of the grouting pipe, and enable the slurry output from the grouting pipe to penetrate into the soil layer around the pipe, so as to improve the grouting pipe. Slurry effect and connection stability with the soil around the pipe.

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...

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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

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