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Grouting pipe reinforcing and grouting structure and construction method thereof

A grouting pipe and grouting technology, applied in the field of steel pipe grouting, can solve the problems of poor bearing effect of grouting pipe, poor output of grouting pipe, support of grouting pipe, etc.

Active Publication Date: 2020-10-27
CHONGQING JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Grouting pipe reinforcing and grouting structure and construction method thereof
  • Grouting pipe reinforcing and grouting structure and construction method thereof
  • Grouting pipe reinforcing and grouting structure and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] This embodiment discloses a grouting pipe reinforcement grouting structure.

[0057] Such as figure 1 and figure 2 Shown: a grouting pipe reinforced grouting structure, including a grouting pipe 1, and a soil-breaking mechanism arranged on the grouting pipe 1; the soil-breaking mechanism includes a fixed part 2 fixedly arranged on the grouting pipe 1, coaxial The sliding pipe part 3 is sleeved on the grouting pipe 1 at a position above the fixed part 2 and is slidingly matched with the surface of the grouting pipe 1. When the sliding pipe part 3 slides along the surface of the grouting pipe 1 toward the fixed part 2, it breaks the soil It can expand toward the axial direction away from the grouting pipe 1 .

[0058] combine image 3 As shown: the outer surface of the sliding pipe part 3 is also provided with a grouting groove penetrating in the direction of the grouting pipe 1 and corresponding to the position of the grouting hole provided on the grouting pipe 1, an...

Embodiment 2

[0077] On the basis of the first embodiment, this embodiment further discloses a construction method for reinforcing a grouting structure with a grouting pipe.

[0078] Such as Figure 6 Shown: a kind of construction method of grouting pipe reinforcement grouting structure, it implements based on the grouting pipe structure in embodiment one, and it comprises the following steps when fixing the grouting pipe:

[0079] Step A: inject the grouting pipe into the set pre-injection hole until the grouting pipe reaches the predetermined installation position;

[0080] Step B: lifting the grouting pipe upwards, so that the conical block and the grouting pipe are separated to an interval arrangement under the force of the elastic component;

[0081] Step C: Push the sliding pipe part toward the fixed part, so that the soil-breaking component expands away from the axis of the grouting pipe to expand the soil layer around the pipe, and at the same time, the grouting groove and the grou...

Embodiment 3

[0085]On the basis of the second embodiment, this embodiment further discloses a positioning guide mechanism and a push rod 81 mechanism.

[0086] In the actual implementation process, the pre-injection hole 101 is a pre-opened "column" hole, and its overall shape corresponds to the grouting pipe 1, but the inner diameter will be larger than the outer diameter of the grouting pipe 1 (in order to facilitate installation and grouting) , which makes the grouting pipe 1 have a certain activity space in the pre-injection hole 101, and then makes it difficult for the grouting pipe 1 to be completely vertically injected or installed in the pre-injection hole 101, that is, the grouting pipe 1 will lean against In the pre-injection hole 101. On the one hand, the inclined arrangement of the grouting pipe 1 makes it difficult to output the slurry uniformly, which not only affects the output effect of the slurry, but also affects the supporting effect of the slurry on the grouting pipe 1;...

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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...

Claims

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Application Information

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IPC IPC(8): E02D3/12
CPCE02D3/12
Inventor 周建庭叶丹张劲泉马虎陈军张向和余建辛景舟杨俊王宗山
Owner CHONGQING JIAOTONG UNIVERSITY
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