A prefabricated pipe pile body defect reinforcing and repairing device

Abstract

The utility model provides a kind of prefabricated pipe pile body defect reinforcement repair device, including pile core backfill layer, first concrete sealing layer, second concrete sealing layer, reinforcement cage, grouting flower pipe and straight-through pipe, the application utilizes the characteristic of pipe pile hollow, and the saturated filling, cementation of defect position of pipe pile is carried out to reinforcement cage combination closed type pressure injection pure cement slurry, improve the compression resistance, shear capacity of defect position;After obtaining saturated filling pressure injection cement of pile core grouting section, cement slurry is injected into rock-soil around pile from pile body defect, improve pile side frictional resistance and restraint force;After high-pressure grouting reinforcement, the cement of pile body and grouting section is well cemented, forms a force integral, to strengthen the integrity of pile body, improve the compression resistance and shear capacity of pile body, to meet design requirements, ensure engineering quality.

Description

Technical Field

[0001] This utility model relates to the field of reinforcement and repair of defects in precast pipe piles, and in particular to a device for reinforcement and repair of defects in precast pipe piles. Background Technology

[0002] Precast pipe piles are hollow concrete piles prefabricated in a factory using a centrifugal molding process. They are made with high-grade concrete (such as C60, C70, and C80) and reinforced with prestressed steel bars, resulting in high strength and durability. However, during actual construction, due to complex geological conditions and improper construction operations, defects such as fractures may occur in the pile body (classified as piles III or IV by low-strain method testing). These defects prevent the piles from passing foundation pile inspection and acceptance, severely impacting their bearing capacity and service life. Traditional repair methods often suffer from high repair costs, unsatisfactory results, and insufficient pile bearing capacity. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] In order to solve the above-mentioned problems in the prior art, this utility model provides a device for reinforcing and repairing defects in the body of precast pipe piles.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0007] A precast pipe pile defect reinforcement and repair device includes a pile core backfill layer, a first concrete sealing layer, a second concrete sealing layer, a reinforcing cage, a grouting pipe, and a straight pipe.

[0008] The core backfill layer is backfilled into the central hole of the precast pipe pile;

[0009] The first concrete sealing layer is placed on top of the pile core backfill layer;

[0010] The reinforcing cage is installed above the first concrete sealing layer;

[0011] The second concrete sealing layer is disposed on the reinforcing cage, and the space between the first concrete sealing layer and the second concrete sealing layer is a grouting cavity;

[0012] Both the grouting pipe and the straight pipe pass through the second concrete sealing layer and enter the grouting cavity.

[0013] Preferably, the core backfill layer is located 2.5-3.0 meters below the defect location of the precast pipe pile.

[0014] Preferably, the first concrete sealing layer is located above the pile core backfill layer and is at least 2m below the location of the pile defect.

[0015] Preferably, one end of the grouting pipe is located 1.5m below the defect location of the precast pipe pile.

[0016] Preferably, one end of the straight pipe is located 1m above the defect location of the precast pipe pile.

[0017] Preferably, the diameter of the reinforcing cage is 100-250mm, the length of the reinforcing cage is not less than 4m, the number of main bars is 3 to 6, the diameter of each bar is 18mm, the diameter of the stirrups is 8mm, and the spacing is 150mm.

[0018] Preferably, when the defect in the precast pipe pile body is less than 3.5m, the second concrete sealing layer is located at the top of the pile, and the reinforcing cage extends upward to 70cm above the second concrete sealing layer.

[0019] (III) Beneficial Effects

[0020] The beneficial effects of this utility model are as follows: By adopting the above technical solution, this application utilizes the hollow characteristics of the pipe pile to inject pure cement grout in a closed manner with a steel cage at the defect location of the pipe pile, so that the pile core and cracks at the defect location are saturated and cemented, thereby improving the compressive and shear resistance of the defect location; after the grouting section of the pile core is saturated and injected with cement, the cement grout is injected into the surrounding soil and rock from the defect location of the pile body, thereby improving the side friction and constraint force of the pile; after high-pressure grouting reinforcement, the pile body and the cement of the grouting section are well cemented together to form a whole under stress, thereby strengthening the integrity of the pile body, improving the compressive and shear resistance of the pile body, thereby meeting the design requirements and ensuring the quality of the project. Attached Figure Description

[0021] Figure 1 A schematic diagram of a precast pipe pile defect reinforcement and repair device. Figure 1 ;

[0022] Figure 2 A schematic diagram of a precast pipe pile defect reinforcement and repair device. Figure 2 .

[0023] [Explanation of Labels in the Attached Image]

[0024] 1. Precast pipe piles;

[0025] 2. Pile core backfill layer;

[0026] 3. First concrete sealing layer;

[0027] 4. Reinforcing cage;

[0028] 5. Second concrete sealing layer;

[0029] 6. Grouting pipe;

[0030] 7. Straight pipe. Detailed Implementation

[0031] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Please refer to Figure 1 This utility model provides a precast pipe pile 1 pile body defect reinforcement and repair device, including pile core backfill layer 2, first concrete sealing layer 3, second concrete sealing layer 5, steel cage 4, grouting pipe 6 and straight pipe 7.

[0033] The pile core backfill layer 2 is backfilled into the center hole of the precast pipe pile 1;

[0034] The first concrete sealing layer 3 is set on top of the pile core backfill layer 2;

[0035] The steel cage 4 is installed above the first concrete sealing layer 3;

[0036] The second concrete sealing layer 5 is disposed on the reinforcing cage 4, and the space between the first concrete sealing layer 3 and the second concrete sealing layer 5 is a grouting cavity.

[0037] Both the grouting pipe 6 and the straight pipe 7 pass through the second concrete sealing layer 5 and enter the grouting cavity.

[0038] During use, the backfill layer 2 is backfilled to a depth of 2.5-3.0 meters below the defect location within the precast pipe pile 1. The bottom is then sealed with the first concrete sealing layer 3 to prevent grout leakage to the lower part during grouting, ensuring saturated filling of the defect treatment section. After cement sealing, the pre-fabricated reinforcing cage 4 is placed into the pile core. The reinforcing cage 4 should be placed vertically during hoisting to prevent it from scraping against the pile wall and deforming. Once the reinforcing cage 4 is in place, the grouting perforation pipe 6 is placed approximately 1.5 meters below the defect location, and the straight pipe 7 is placed approximately 1 meter above the defect location. Crushed stone is then backfilled to a depth of 2 meters above the defect location. After stopping the backfilling, the second concrete sealing layer is used. Layer 5 is sealed. During sealing, it should be vibrated evenly and saturated to ensure no leakage or cracking of the sealing cement during subsequent grouting. This application utilizes the hollow nature of the pipe pile to inject pure cement grout in a closed manner with a steel cage 4 at the defect location of the pipe pile, so that the pile core and cracks at the defect location are saturated and cemented, improving the compressive and shear resistance of the defect location. After the grouting section of the pile core is saturated and injected with cement, the cement grout is injected into the surrounding soil and rock from the defect of the pile body, improving the side friction and constraint force of the pile. After high-pressure grouting reinforcement, the pile body and the cement of the grouting section are well cemented together to form a whole under stress, thereby strengthening the integrity of the pile body, improving the compressive and shear resistance of the pile body, thus meeting the design requirements and ensuring the quality of the project.

[0039] In this embodiment, the core backfill layer 2 is located 2.5-3.0 meters below the defect location of the precast pipe pile 1.

[0040] In this embodiment, the first concrete sealing layer 3 is located above the pile core backfill layer 2 and is at least 2m below the location of the pile defect.

[0041] In this embodiment, one end of the grouting pipe 6 is located 1.5m below the defect location of the precast pipe pile 1.

[0042] In this embodiment, one end of the straight pipe 7 is located 1m above the defect location of the precast pipe pile 1.

[0043] In this embodiment, the diameter of the steel cage 4 is 100-250mm, the length of the steel cage 4 is not less than 4m, the number of main bars is 3 to 6, the diameter of each bar is 18mm, the diameter of the stirrups is 8mm, and the spacing is 150mm.

[0044] In this embodiment, when the defect in the precast pipe pile 1 is less than 3.5m, the second concrete sealing layer 5 is located at the top of the pile, and the steel cage 4 extends upward to 70cm above the second concrete sealing layer 5.

[0045] The working principle of this utility model is as follows:

[0046] Backfill the core with the second backfill layer to a depth of 2.5-3.0 meters below the defect location within the precast pipe pile 1. Then, seal the bottom with the first concrete sealing layer 3 to prevent grout leakage to the lower part during grouting, ensuring saturated filling of the defect treatment section. After sealing the bottom with cement, place the pre-fabricated reinforcing cage 4 into the pile core. When hoisting the reinforcing cage 4, it should be placed vertically to prevent it from scraping against the pile wall and causing deformation. Once the reinforcing cage 4 is in place, begin placing the grouting perforation pipe 6, positioning it approximately 1.5 meters below the defect location. Place the straight pipe 7 approximately 1 meter above the defect location. Then, backfill with crushed stone to a depth of 2 meters above the defect location. After stopping the backfilling of crushed stone, use the second concrete sealing layer. 5. When sealing, the joint should be vibrated evenly and saturated to ensure no leakage or cracking of the sealing cement during subsequent grouting. This application utilizes the hollow nature of the pipe pile to inject pure cement grout into the defective location of the pipe pile using a steel cage 4 in a closed manner. This saturates and cementes the pile core and cracks in the defective area, improving the compressive and shear resistance of the defective location. After the grouting section of the pile core is saturated and filled with cement, the cement grout is injected into the surrounding soil and rock from the defective part of the pile body, increasing the side friction and constraint force of the pile. After high-pressure grouting reinforcement, the pile body and the cement of the grouting section are well bonded together to form a whole under stress, thereby strengthening the integrity of the pile body, improving the compressive and shear resistance of the pile body, thus meeting the design requirements and ensuring the quality of the project.

[0047] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0048] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A precast pipe pile body defect reinforcement repair device, characterized in that, It includes the pile core backfill layer, the first concrete sealing layer, the second concrete sealing layer, the reinforcing cage, the grouting pipe, and the straight pipe; The core backfill layer is backfilled into the central hole of the precast pipe pile; The first concrete sealing layer is placed on top of the pile core backfill layer; The reinforcing cage is installed above the first concrete sealing layer; The second concrete sealing layer is disposed on the reinforcing cage, and the space between the first concrete sealing layer and the second concrete sealing layer is a grouting cavity; Both the grouting pipe and the straight pipe pass through the second concrete sealing layer and enter the grouting cavity.

2. The precast pipe pile body defect reinforcing and repairing device according to claim 1, characterized in that, The core backfill layer is located 2.5-3.0 meters below the defect location of the precast pipe pile.

3. The precast pipe pile body defect reinforcing and repairing device according to claim 1, characterized in that, The first concrete sealing layer is located above the pile core backfill layer and is at least 2m below the location of the pile defect.

4. The precast pipe pile body defect reinforcing and repairing device according to claim 1, characterized in that, The bottom end of the grouting pipe is located 1.5m below the defect location of the precast pipe pile.

5. The precast pipe pile body defect reinforcing and repairing device according to claim 1, characterized in that, One end of the straight pipe is located 1m above the defect location of the precast pipe pile.

6. The precast pipe pile body defect reinforcing and repairing device according to claim 1, characterized in that, The diameter of the steel cage is 100-250mm, the length of the steel cage is not less than 4m, the number of main bars is 3 to 6, the diameter of each bar is 18mm, the diameter of the stirrups is 8mm, and the spacing is 150mm.

7. The precast pipe pile body defect reinforcing and repairing device according to claim 1, characterized in that, When the defect in the precast pipe pile body is less than 3.5m, the second concrete sealing layer is located at the top of the pile, and the steel cage extends upward to 70cm above the second concrete sealing layer.

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