Crack repairing structure for concrete pipe pile

Abstract

The utility model provides a crack repairing structure for a concrete pipe pile, belongs to the technical field of structural repairing of concrete pipe piles, and aims to solve the problems that the strength of the concrete pipe pile is reduced and the durability is reduced due to cracks of the concrete pipe pile. The crack repairing structure for the concrete pipe pile comprises a bonding part, at least one hoop and a filling part. And the bonding part is filled in the crack of the concrete pipe pile. And the hoop is encircled on the concrete pipe pile. And the hoop covers the crack. And a gap is formed between the inner wall of the hoop and the outer wall of the concrete pipe pile. The filling part is filled in the gap. According to the crack repairing structure for the concrete pipe pile, cracks on the concrete pipe pile can be repaired, effective reinforcement can be formed on the outside, the bearing capacity and durability of the concrete pipe pile are improved, and the service life of the concrete pipe pile is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of structural repair technology for concrete pipe piles, and specifically relates to a structure for repairing cracks in concrete pipe piles. Background Technology

[0002] Prestressed concrete (PHC) pipe piles possess excellent load-bearing capacity and economic efficiency, making them widely used in building foundation engineering. However, in practical applications, due to factors such as improper construction techniques, foundation settlement, and material aging, PHC pipe piles may develop various forms of cracks. If these cracks are not repaired in a timely manner, they will lead to a decrease in the strength and durability of the pipe piles, and may even cause structural safety hazards. Existing repair techniques mostly employ external grouting and patching methods, but the repair effects are unsatisfactory, with problems such as insufficient repair strength and difficulty in connecting the internal cracks. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to provide a crack repair structure for concrete pipe piles, which can repair cracks on concrete pipe piles and effectively reinforce the outside, improve the bearing capacity and durability of concrete pipe piles, and extend their service life.

[0004] To address the aforementioned problems, this utility model provides a crack repair structure for concrete pipe piles, comprising: an adhesive portion, at least one clamp, and a filling portion. The adhesive portion fills the crack in the concrete pipe pile. The clamp wraps around the concrete pipe pile, covering the crack. A gap exists between the inner wall of the clamp and the outer wall of the concrete pipe pile. The filling portion fills the gap.

[0005] Optionally, the crack repair structure for concrete pipe piles also includes a sealant layer. The sealant layer covers the opening of the crack. The adhesive fills the receiving space enclosed by the inner wall of the crack and the sealant layer.

[0006] Alternatively, the adhesive may be made of epoxy resin.

[0007] Optionally, the clamp includes a pair of semi-circular sleeves. The pair of semi-circular sleeves interlock to encircle the concrete pipe pile.

[0008] Optionally, the semi-circular sleeve includes: a main body, a connecting plate, and multiple ribs. The main body is semi-circular in shape. The connecting plate is disposed on both sides of the main body along its axial direction. Bolt holes are provided on the connecting plate. The ribs connect the outer wall of the main body to the connecting plate.

[0009] Optionally, the clamp may also include: multiple positioning reinforcing bars. The positioning reinforcing bars are disposed on the inner wall of the semi-circular sleeve, and extend radially along the semi-circular sleeve.

[0010] Optionally, the crack repair structure for concrete pipe piles further includes a reinforcing cage. The reinforcing cage surrounds the concrete pipe pile and is embedded in the infill.

[0011] Optionally, the reinforcing cage includes multiple longitudinal bars and multiple reinforcing stirrups. The longitudinal bars are evenly distributed circumferentially along the concrete pipe pile. The longitudinal bars extend axially along the concrete pipe pile. The reinforcing stirrups encircle and connect to the longitudinal bars. The reinforcing stirrups are evenly distributed along the length of the longitudinal bars.

[0012] Optionally, the material for the infill may include micro-expansion concrete.

[0013] Optionally, the crack repair structure for concrete pipe piles also includes a cap structure. The cap structure is annular. The cap structure surrounds the outer periphery of the concrete pipe pile. The cap structure is attached to the top of the clamp.

[0014] Beneficial effects

[0015] The present invention provides a crack repair structure for concrete pipe piles, comprising an adhesive portion, at least one clamp, and a filling portion. The adhesive portion fills the crack in the concrete pipe pile, the clamp surrounds the concrete pipe pile and covers the crack, and the filling portion fills the gap between the clamp and the concrete pipe pile. Using the crack repair structure for concrete pipe piles of the present invention, cracks can be effectively filled, the cross-sectional integrity of the concrete pipe pile can be restored, and corrosive media can be prevented from entering. It can also effectively restore the bearing capacity of the concrete pipe pile and enhance its durability and shear resistance. Furthermore, the crack repair structure for concrete pipe piles of the present invention is simple in structure and convenient to construct, which helps to shorten the construction period, reduce maintenance costs, and reduce resource waste. Attached Figure Description

[0016] Figure 1 A cross-sectional view of a crack repair structure for concrete pipe piles according to an embodiment of this utility model;

[0017] Figure 2 for Figure 1 Sectional view at point B;

[0018] Figure 3 for Figure 2 Enlarged view of point A;

[0019] Figure 4 A top view of a semi-circular sleeve according to an embodiment of this utility model;

[0020] Figure 5 A front view of a semi-circular sleeve according to an embodiment of this utility model;

[0021] Figure 6A schematic diagram of the structure of a clamp according to an embodiment of this utility model;

[0022] Figure 7 A schematic diagram of the structure of a reinforcing cage according to an embodiment of this utility model;

[0023] Figure 8 This is a distribution diagram of the adhesive injection base for a concrete pipe pile according to one embodiment of the present invention.

[0024] The reference numerals in the attached figures are as follows:

[0025] 1. Adhesive layer; 2. Clamp; 3. Filler layer; 4. Sealing adhesive layer; 5. Reinforcing cage; 6. Cap structure; 7. Concrete pipe pile; 8. Crack; 9. Pad; 0. Injection base;

[0026] 21. Semi-circular sleeve; 22. Positioning reinforcement bar;

[0027] 211. Main body; 212. Connecting plate; 213. Rib plate; 214. Bolt hole; 215. Bolt;

[0028] 51. Longitudinal reinforcement; 52. Stirrups. Detailed Implementation

[0029] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, in the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0033] This embodiment provides a structure for repairing cracks in concrete pipe piles. Figure 1 This is a cross-sectional view of a crack repair structure for concrete pipe piles provided in this embodiment. Figure 2 for Figure 1 Sectional view at point B. Figure 3 for Figure 2 Enlarged view of point A.

[0034] like Figures 1-3 As shown, this embodiment provides a crack repair structure for concrete pipe piles, comprising: an adhesive portion 1, at least one clamp 2, and a filling portion 3. The adhesive portion 1 fills the crack 8 in the concrete pipe pile 7. The clamp 2 surrounds the concrete pipe pile 7, covering the crack 8. A gap exists between the inner wall of the clamp 2 and the outer wall of the concrete pipe pile 7. The filling portion 3 fills the gap.

[0035] Understandably, when the crack 8 on the concrete pipe pile 7 is relatively long, multiple clamps 2 can be used to encircle the concrete pipe pile 7 and connect them sequentially to cover the crack 8. When the crack 8 on the concrete pipe pile 7 is relatively short, and one clamp 2 is sufficient to cover the crack, only one clamp 2 can be used.

[0036] The crack repair structure for concrete pipe piles in this embodiment includes an adhesive part 1, at least one clamp 2, and a filling part 3. The adhesive part 1 fills the crack 8 in the concrete pipe pile 7, the clamp 2 surrounds the concrete pipe pile 7 and covers the crack 8, and the filling part 3 fills the gap between the clamp 2 and the concrete pipe pile 7. Using this crack repair structure for concrete pipe piles, the crack 8 can be effectively filled, the cross-sectional integrity of the concrete pipe pile 7 can be restored, and corrosive media can be prevented from entering. It can also effectively restore the bearing capacity of the concrete pipe pile 7 and enhance its durability and shear resistance. Furthermore, the crack repair structure for concrete pipe piles of this invention is simple in structure and convenient to construct, which helps to shorten the construction cycle, reduce maintenance costs, and reduce resource waste.

[0037] In some embodiments, such as Figure 3As shown, the crack repair structure for concrete pipe piles also includes a sealing adhesive layer 4. The sealing adhesive layer 4 covers the opening of the crack 8. The adhesive portion 1 fills the receiving space formed by the inner wall of the crack 8 and the sealing adhesive layer 4. In this embodiment, covering the opening of the crack 8 with a sealing adhesive layer can form a receiving space between the inner wall of the crack 8 and the sealing adhesive layer 4, so as to facilitate the filling of the adhesive portion 1 into the crack 8. At the same time, it can also prevent the adhesive portion 1 from directly contacting the filling portion 3, avoiding contamination of the adhesive portion 1.

[0038] In some embodiments, see Figure 3 The material of the adhesive part 1 includes epoxy resin.

[0039] In this embodiment, the adhesive part 1 is made of epoxy resin, whose main components are epoxy compounds (such as bisphenol A epoxy resin, bisphenol F epoxy resin, etc.) and hardeners (such as amines, acid anhydrides, etc.), possessing excellent adhesion and good mechanical strength. After curing, it has high tensile strength, compressive strength, and shear strength, can withstand large loads, and has a low shrinkage rate after curing, which helps to maintain the bonding strength and stability.

[0040] Figure 4 This is a top view of a semi-circular sleeve 21 provided in this embodiment. Figure 5 This is a front view of a semi-circular sleeve 21 provided in this embodiment. Figure 6 This is a schematic diagram of the structure of a clamp 2 provided in this embodiment. In some embodiments, such as Figures 4-6 As shown, the clamp 2 includes a pair of semi-circular sleeves 21. The pair of semi-circular sleeves 21 interlock to enclose the concrete pipe pile 7.

[0041] In this embodiment, the clamp 2 uses a pair of semi-circular sleeves 21 that are interlocked on the concrete pipe pile 7, which facilitates installation and disassembly, and helps to reduce construction difficulty and improve construction efficiency.

[0042] In some embodiments, such as Figures 4-6 As shown, the semi-circular sleeve 21 includes a main body 211, a connecting plate 212, and multiple ribs 213. The main body 211 is semi-circular in shape. The connecting plate 212 is disposed on both sides of the main body 211 along the axial direction of the main body 211. Bolt holes 214 are provided on the connecting plate 212. The ribs 213 connect the outer wall of the main body 211 and the connecting plate 212.

[0043] The semi-circular sleeve 21 of this embodiment includes a main body 211, a connecting plate 212, and multiple ribs 213. The main body 211 and the connecting plate 212 adopt an integral molding structure, and the ribs 213 can improve the structural strength of the connecting plate 212. When the two semi-circular sleeves 21 are fastened together, the connecting plates 212 fit together, and the bolt holes 214 correspond one-to-one. By using the bolts 215 to cooperate with the bolt holes 214, the two semi-circular sleeves 21 can be connected to form a clamp 2.

[0044] In some embodiments, such as Figures 4-6 As shown, the clamp 2 also includes a plurality of positioning reinforcing bars 22. The positioning reinforcing bars 22 are disposed on the inner wall of the semi-circular sleeve 21, and extend radially along the semi-circular sleeve 21.

[0045] In this embodiment, a positioning steel bar 22 is provided on the inner wall of the semi-circular sleeve 21. When the filling part 3 fills the gap between the inner wall of the clamp 2 and the outer wall of the concrete pipe pile 7, the positioning steel bar 22 is inserted into the filling part 3 to play a positioning role.

[0046] In some embodiments, such as Figure 1 and Figure 2 As shown, the crack repair structure for concrete pipe piles also includes a reinforcing cage 5. The reinforcing cage 5 surrounds the concrete pipe pile 7 and is embedded in the filling part 3.

[0047] In this embodiment, a steel cage 5 is embedded in the filling part 3, which helps to improve the structural strength and tensile strength of the filling part 3.

[0048] Figure 7 This is a structural schematic diagram of a reinforcing cage 5 provided in this embodiment. In some embodiments, such as Figure 7 As shown, the reinforcing cage 5 includes multiple longitudinal reinforcing bars 51 and multiple reinforcing stirrups 52. The multiple longitudinal reinforcing bars 51 are evenly distributed circumferentially along the concrete pipe pile 7. The longitudinal reinforcing bars 51 extend axially along the concrete pipe pile 7. The reinforcing stirrups 52 encircle the multiple longitudinal reinforcing bars 51 and connect to them. The multiple reinforcing stirrups 52 are evenly distributed along the length of the longitudinal reinforcing bars 51.

[0049] The steel cage 5 in this embodiment includes multiple longitudinal steel bars 51 and multiple reinforcing stirrups 52, which are arranged in a crisscross pattern to cope with forces in multiple directions.

[0050] In some embodiments, see Figures 1-3 The material of the filling part 3 includes micro-expansion concrete.

[0051] In this embodiment, the filling part 3 uses micro-expansion concrete. Micro-expansion concrete refers to ordinary concrete with a certain amount of expansion agent added, so that the concrete can expand to a certain extent during hydration due to the action of the expansion agent, thereby compensating for the shrinkage of the concrete, achieving the purpose of preventing concrete cracks and improving concrete performance. Preferably, the material of the filling part 3 is C40 micro-expansion fine aggregate concrete.

[0052] In some embodiments, such as Figure 1 As shown, the crack repair structure for the concrete pipe pile also includes a cap structure 6. The cap structure 6 is annular. The cap structure 6 surrounds the outer periphery of the concrete pipe pile 7. The cap structure 6 is connected to the top of the clamp 2.

[0053] In this embodiment, as Figure 1 As shown, the bottom of the clamp 2 is also provided with a pad 9, which is connected between the clamp 2 and the concrete pipe pile 7 and can support the filling part 3 between the clamp 2 and the concrete pipe pile 7.

[0054] In this embodiment, the cap structure 6 is connected to the top of the clamp 2, and can form an integral structure with the clamp 2 to share the force.

[0055] The above describes the crack repair structure for concrete pipe piles according to this embodiment. The repair steps for cracks in concrete pipe piles are described below:

[0056] 1) Crack 8 treatment: Use tools such as wire brushes to remove cement soil, dust, slag and other dirt from the surface of crack 8 of concrete pipe pile 7, then blow out the dust in crack 8, and then wipe the surface of crack 8 with cotton wool soaked in acetone.

[0057] 2) Attach the glue-filled base 0: such as Figure 8 As shown, the injection location is selected according to the condition of crack 8, and the injection base 0 is installed at the injection location. Before installing the injection base 0, apply adhesive evenly to the bottom of the injection base 0 (be careful not to block the adhesive hole of the injection base 0 during operation), then align the adhesive outlet of the injection base 0 with crack 8 and stick it to the concrete pipe pile 7. The injection bases 0 are distributed along the length of crack 8, and the installation spacing between two adjacent injection bases 0 can be adjusted according to the width of crack 8, preferably 200mm to 300mm.

[0058] 3) Forming the sealing layer 4: Using a tool (such as a small scraper), apply the sealing adhesive to the opening of the crack 8 to form the sealing layer 4. Preferably, the sealing layer 4 is approximately 1 mm thick and 20 mm to 30 mm wide. It is important to note that the adhesive should be applied smoothly to ensure a tight and reliable seal. The bonding portion 1 can only be injected after the sealing adhesive has completely dried.

[0059] 4) Forming the adhesive layer 1: Epoxy resin is loaded into a syringe, such as... Figure 8 As shown, the vertical crack 8 is filled in order from bottom to top. Using a syringe, start by injecting from the first injection base 0 from the bottom, continuing until glue flows out of the injection base 0 above it. Then seal the inlet of the bottom injection base 0. Next, inject from the second injection base 0 from the bottom, and continue in this sequence. Use epoxy resin with good flowability and properties that meet relevant specifications and standards. After filling, do not disturb the injection bases for 8 hours, and remove the injection bases 0 after 1-2 days.

[0060] 5) Processing and installation of clamp 2: After the grouting is completed, remove the grouting base and install clamp 2 around the outer perimeter of the concrete pipe pile 7 (the outer surface of clamp 2 must be derusted and treated with anti-corrosion). Clamp 2 is made of Q235 steel and 6mm thick steel plate. Clamp 2 consists of two semi-circular sleeves 21. The diameter of the semi-circular sleeves 21 is 200mm larger than the diameter of the concrete pipe pile 7. The two semi-circular sleeves 21 are connected by bolts 215. When multiple clamps 2 are used on one concrete pipe pile 7, the length of each clamp 2 is 1.5m (the length can be adjusted according to the processing situation). When clamping around the concrete pipe pile 7, the bottom of clamp 2 should extend at least 1.0m beyond the lower end of crack 8, and the top of clamp 2 should extend at least 0.5m beyond the end of crack 8. To ensure that the clamp 2 is concentric with the concrete pipe pile 7, a positioning steel bar 22 is also provided on the inner wall of the clamp 2. The positioning steel bar 22 is made of grade I steel with a diameter of 10mm and a length of 200mm. The spacing along the axial direction of the clamp 2 is 500mm, and it is welded to the inner wall of the semi-circular sleeve 21.

[0061] 6) A reinforcing cage 5 is installed between the clamp 2 and the concrete pipe pile 7. The reinforcing cage 5 includes longitudinal reinforcing bars 51 and reinforcing stirrups 52. The longitudinal reinforcing bars 51 are made of 12 steel bars with a diameter of 20mm. The reinforcing stirrups 52 are made of grade III steel with a diameter of 20mm, and the spacing between two adjacent reinforcing stirrups 52 is 80mm. The reinforcing stirrups 52 are made of two semi-circular steel bars welded together. The diameter of the reinforcing stirrups 52 is 40mm larger than the diameter of the concrete pipe pile 7, and the welding length on one side shall not be less than 10d.

[0062] 7) Grouting inside clamp 2 to form filling part 3: C40 micro-expansion agent fine stone concrete is poured into clamp 1, poured in sections from bottom to top and vibrated to compact, forming filling part 3.

[0063] 8) Install a cap structure 6 on the top of the clamp 2. The cap structure 6 is connected to the clamp 2 to form an integral structure and share the load.

[0064] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0065] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A crack repair structure for concrete pipe piles, characterized in that, include: The bonding portion fills the cracks in the concrete pipe pile; At least one clamp is wrapped around the concrete pipe pile; The clamp covers the crack; There is a gap between the inner wall of the clamp and the outer wall of the concrete pipe pile; A filling portion, which fills the gap.

2. The crack repair structure for concrete pipe piles according to claim 1, characterized in that, Also includes: A sealant layer is applied to cover the opening of the crack; The adhesive portion fills the accommodating space formed by the inner wall of the crack and the sealing adhesive layer.

3. The crack repair structure for concrete pipe piles according to claim 1 or 2, characterized in that, The adhesive part is made of epoxy resin.

4. The crack repair structure for concrete pipe piles according to claim 1, characterized in that, The clamp includes: A pair of semi-circular sleeves, which interlock to encircle the concrete pipe pile.

5. The crack repair structure for concrete pipe piles according to claim 4, characterized in that, The semi-circular sleeve includes: The main body is semi-circular in shape; A connecting plate is disposed on both sides of the main body along the axial direction of the main body; the connecting plate is provided with bolt holes; Multiple ribs are connected between the outer wall of the main body and the connecting plate.

6. The crack repair structure for concrete pipe piles according to claim 4 or 5, characterized in that, The clamp also includes: Multiple positioning reinforcing bars are disposed on the inner wall of the semi-circular sleeve; and the positioning reinforcing bars extend radially along the semi-circular sleeve.

7. The crack repair structure for concrete pipe piles according to claim 1, characterized in that, Also includes: A reinforcing cage surrounds the concrete pipe pile. The reinforcing cage is embedded in the filling section.

8. The crack repair structure for concrete pipe piles according to claim 7, characterized in that, The steel cage includes: Multiple longitudinal reinforcing bars are evenly distributed along the circumference of the concrete pipe pile; the longitudinal reinforcing bars extend along the axial direction of the concrete pipe pile. Multiple reinforcing stirrups are provided, which encircle and connect to the multiple longitudinal reinforcing bars; the multiple reinforcing stirrups are evenly distributed along the length of the longitudinal reinforcing bars.

9. The crack repair structure for concrete pipe piles according to claim 1, characterized in that, The filling material includes micro-expansion concrete.

10. The crack repair structure for concrete pipe piles according to claim 1, characterized in that, Also includes: A cap structure, the cap structure being annular; the cap structure surrounds the outer periphery of the concrete pipe pile; The cap structure is attached to the top of the clamp.

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