Reinforcing treatment device for fracture defect of pile body of cast-in-place pile

Abstract

The utility model provides a cast-in-place pile body fracture defect reinforcing treatment device which comprises a straight-through pipe, a floral pipe, a reinforcing steel bar, coring holes, filler and a concrete seal, the coring holes are evenly and symmetrically distributed within the range of 0.15 D-0. 25D away from the center of a pile, and the coring depth needs to penetrate through the position 2 m below the fracture defect of a cast-in-place pile body; after embedding of the grouting pipes is finished, two steel bars are placed in each coring hole, then filling is conducted in the holes, filling is conducted to the position 1 m away from the hole openings, and coring hole blocking is conducted; mutual complementation among the grouting holes can be increased through the multiple coring holes, the coring holes and the fracture surface of the pile body are fully filled with cement paste in a saturated mode, and meanwhile the cement paste flows to rock soil on the pile side from the fracture position to solidify rock soil on the periphery of the pile; after high-pressure grouting reinforcement treatment, the compression resistance and shear resistance of the pile body and the side friction resistance of rock soil on the pile side are improved, so that the integrity of the repaired foundation pile body meets detection specifications and design requirements, the pile body of the cast-in-place pile is effectively reinforced, and the engineering quality safety is ensured.

Description

Technical Field

[0001] The utility model relates to the field of repair of cast-in-place pile bodies, and particularly to a device for reinforcing and treating the fracture defects of cast-in-place pile bodies. Background Art

[0002] As a common foundation form in civil engineering, the quality of cast-in-place piles is directly related to the safety and stability of the entire project. However, during the actual construction process, due to complex geological conditions, improper construction operations and other factors, defects such as fractures may occur in the pile body (low-strain method detection shows that it is a Class III or Class IV pile), which cannot pass the acceptance of the foundation pile detection and seriously affect its bearing capacity and service life. Traditional repair methods often have problems such as high repair costs, unsatisfactory effects and insufficient bearing capacity of the pile body. Content of the Utility Model

[0003] (I) Technical Problems to be Solved

[0004] In order to solve the above problems of the prior art, the utility model provides a device for reinforcing and treating the fracture defects of cast-in-place pile bodies.

[0005] (II) Technical Solutions

[0006] In order to achieve the above object, the main technical solutions adopted by the utility model include:

[0007] A device for reinforcing and treating the fracture defects of cast-in-place pile bodies, including a straight pipe, a perforated pipe, steel bars, core extraction holes, fillers and concrete seals;

[0008] The core extraction holes should be evenly and symmetrically distributed within the range of 0.15D to 0.25D from the pile center, and the core extraction depth should penetrate 2m below the fracture defect of the cast-in-place pile body;

[0009] The steel bars are buried at the bottom of the inner wall of the core extraction holes and extend above the fracture defect of the cast-in-place pile body;

[0010] The fillers are filled in the core extraction holes, and the filling stops when the fillers are filled to a position close to 1m from the pile top;

[0011] The concrete seal is installed above the fillers and seals the opening of the core extraction holes;

[0012] The perforated pipe sequentially passes through the concrete seal and the fillers and extends below the fracture defect of the cast-in-place pile body in the core extraction holes;

[0013] The straight pipe passes through the concrete seal and extends into the fillers, and is located above the fracture defect of the cast-in-place pile body in the core extraction holes.

[0014] Preferably, the embedding position on the perforated pipe is 0.5 - 1.0 m below the fracture defect position of the bored pile body.

[0015] Preferably, the embedding depth of the straight pipe is 2 m.

[0016] Preferably, grout stop valves are provided at the tops of both the perforated pipe and the straight pipe.

[0017] Preferably, the length of the steel bar is 4 m.

[0018] Preferably, the filler is 1 cm fine aggregate, and the filling stops when the filler reaches 1 m from the opening of the core drilling hole.

[0019] Preferably, the thickness of the concrete seal is 1 m.

[0020] Preferably, at least two core drilling holes are provided to reach the fracture defect of the pile body.

[0021] (III) Beneficial Effects

[0022] The beneficial effects of the present utility model are as follows: By adopting the above technical solution, the cement slurry is injected into the core drilling hole through the perforated pipe, so that the cement slurry fully fills the voids of the fracture defect and the backfilled gravel, and the water and air at the bottom of the core drilling hole are squeezed from bottom to top, and the water and air are discharged from the straight pipe, improving the cement strength at the defect and in the core drilling hole, thereby repairing the integrity of the pile body and improving the bearing capacity of the pile body; The setting of multiple core drilling holes can increase the mutual complementarity between the grouting holes, so that the core drilling holes and the fracture surface of the pile body are fully saturated with cement slurry, and at the same time the cement slurry flows from the fracture to the surrounding rock and soil of the pile, solidifying the surrounding rock and soil of the pile; After the high-pressure grouting reinforcement treatment, the compressive and shear bearing capacities of the pile body and the side friction resistance of the surrounding rock and soil of the pile are improved, so that the integrity of the repaired foundation pile body meets the requirements of the inspection code and the design, and the bored pile body is effectively reinforced to ensure the quality and safety of the project. Description of the Drawings

[0023] Figure 1 It is a structural schematic diagram of a device for reinforcing the fracture defect of a bored pile body.

[0024] Description of the Reference Numerals:

[0025] 1. Bored pile body;

[0026] 2. Steel bar;

[0027] 3. Core drilling hole;

[0028] 4. Filler;

[0029] 5. Straight pipe;

[0030] 6. Perforated pipe;

[0031] 7. Concrete sealing;

[0032] 8. Fracture defect location. Detailed implementation manner

[0033] To better explain the present utility model for easy understanding, the present utility model will be described in detail below in conjunction with the drawings through specific implementation manners.

[0034] Please refer to Figure 1 , the present utility model provides a device for reinforcing the fracture defect of the bored pile body 1, including a straight pipe 5, a perforated pipe 6, a steel bar 2, a core extraction hole 3, a filler 4, and a concrete seal 7;

[0035] The core extraction holes 3 should be evenly and symmetrically distributed within the range of 0.15D - 0.25D from the pile center, and the core extraction depth should penetrate 2m below the fracture defect location 8 of the bored pile body 1; D is the diameter of the bored pile body 1;

[0036] The steel bar 2 is buried at the bottom of the inner wall of the core extraction hole 3 and extends above the fracture defect location 8 of the bored pile body 1;

[0037] The filler 4 is filled in the core extraction hole 3, and the filling of the filler 4 stops when it is close to 1m from the pile top; the concrete seal 7 is installed above the filler 4 and seals the opening of the core extraction hole 3;

[0038] The perforated pipe 6 sequentially passes through the concrete seal 7 and the filler 4 and extends to the lower part of the fracture defect location 8 of the bored pile body 1 in the core extraction hole 3;

[0039] The straight pipe 5 passes through the concrete seal 7 and extends into the filler 4, and is located above the fracture defect location 8 of the bored pile body 1 in the core extraction hole 3;

[0040] During use, cement slurry is injected into the core extraction hole 3 through the perforated pipe 6, so that the cement slurry fully fills the voids of the fracture defect and the backfilled gravel, and water and air are squeezed from the bottom of the core extraction hole 3 from bottom to top, and the water and air are discharged from the straight pipe 5, improving the cement strength at the defect location and in the core extraction hole, thereby repairing the integrity of the pile body and improving the bearing capacity of the pile body.

[0041] In this embodiment, the buried position of the perforated pipe 6 is 0.5 - 1.0m below the fracture defect position of the bored pile body 1.

[0042] In this embodiment, the buried depth of the straight pipe 5 is 2m.

[0043] In this embodiment, grout stop valves are provided at the tops of both the perforated pipe 6 and the straight-through pipe 5. During grouting, when cement slurry overflows from the straight-through pipe 5 and the concentration of the cement slurry is the same as that during injection, the grout stop valve can be closed and grouting can continue under pressure. When grouting slurry overflows from the hole opening or around the pile, grouting should be stopped. If the above phenomena do not occur, the termination standard for grouting is a grouting pressure of 2 - 3 Mpa and a maximum grouting pressure not exceeding 5 Mpa, with a continuous grouting time of 30 minutes; Grouting for pile body defects should be completed in the order of one pile by one hole; After grouting is completed, the grouting pipe is left in the hole without recovery.

[0044] In this embodiment, the length of the steel bar 2 is 4m.

[0045] In this embodiment, the filler 4 is 1cm fine aggregate. After the filler 4 is filled to 1m from the opening of the core drilling hole 3, the filling of the filler 4 stops.

[0046] In this embodiment, the thickness of the concrete seal 7 is 1m.

[0047] In this embodiment, at least two core drilling holes 3 are provided to reach the fracture defect of the pile body. The setting of multiple core drilling holes 3 can increase the reinforcement points of the cast-in-place pile body 1. And when high-pressure cleaning is performed on one of the core drilling holes 3 and water overflows from the other hole, it can be determined that the defect part has been penetrated, ensuring effective reinforcement treatment of the cast-in-place pile body 1.

[0048] The working principle of the present utility model is as follows:

[0049] The cement slurry is injected into the core drilling hole 3 through the perforated pipe 6, so that the cement slurry fully fills the voids of the pile body fracture defect and the backfilled crushed stones. Water and air are squeezed from the bottom of the core drilling hole 3 from bottom to top, and the water and air are discharged from the straight-through pipe 5, improving the cement strength at the defect, thereby improving the bearing capacity of the pile body; And the setting of multiple core drilling holes 3 can increase the reinforcement points of the cast-in-place pile body 1. And when high-pressure cleaning is performed on one of the core drilling holes 3 and water overflows from the other hole, it can be determined that the defect part has been penetrated, ensuring effective reinforcement treatment of the cast-in-place pile body 1.

[0050] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. All equivalent transformations made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in related technical fields, are equally included in the patent protection scope of the present utility model.

[0051] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard 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 device for reinforcing and treating fracture defects of a cast-in-place pile, characterized in that: Including straight pipes, flower pipes, steel bars, core holes, fillers and concrete seals; The core holes should be evenly and symmetrically distributed within the range of 0.15D to 0.25D from the pile center, and the core depth should penetrate 2m below the fracture defect of the pile body; The steel bar is buried at the bottom of the inner wall of the core hole and extends to the top of the fracture defect of the cast-in-place pile body; The filler is buried in the core hole, and the filling is stopped after the filler is buried to about 1m near the pile top; The concrete seal is installed above the filler and blocks the opening of the coring hole; The flower tube passes through the concrete seal and the filler in sequence and extends to below the fracture defect of the cast-in-place pile body in the coring hole; The straight-through pipe passes through the concrete seal and extends into the filler, and is located above the fracture defect of the cast-in-place pile body in the core hole.

2. The device for reinforcing the fracture defect of a cast-in-place pile according to claim 1, characterized in that: The buried position of the flower pipe is 0.5-1.0m below the fracture defect position of the cast-in-place pile body.

3. The device for reinforcing the fracture defect of a cast-in-place pile according to claim 1, characterized in that: The straight pipe is buried at a depth of 2m.

4. The device for reinforcing the fracture defect of a cast-in-place pile according to claim 1, characterized in that: The tops of the flower tube and the straight tube are both provided with slurry stop valves.

5. The device for reinforcing the fracture defect of a cast-in-place pile according to claim 1, characterized in that: The length of the steel bar is 4m.

6. The device for reinforcing the fracture defect of a cast-in-place pile according to claim 1, characterized in that: The filler is 1 cm fine stone aggregate, and the filling is stopped after the filler is filled to 1 m away from the opening of the core hole.

7. The device for reinforcing the fracture defect of a cast-in-place pile according to claim 1, characterized in that: The thickness of the concrete seal is 1m.

8. The device for reinforcing the fracture defect of a cast-in-place pile according to claim 1, characterized in that: The core sampling holes are provided with at least two holes to obtain the fracture defects of the pile body.

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