A method for removing hinge joint concrete of hollow slab beam without damaging and treating diseases

Abstract

The present application relates to a kind of hollow slab beam hinge joint concrete breaking and disease treatment method without damaging, including the following steps concrete pre-cleaning, bottom plugging, deep repair and surface repair four steps.The present application construction technology is simple, good universality and environmental applicability, can effectively meet the needs of bridge structure rapid repair operation under a variety of environments, and effectively reduce the material usage and work difficulty in bridge repair operation, and can effectively repair the structural defects in bridge structure, thereby greatly improve the work efficiency and quality of bridge repair operation, while effectively reduce the labor intensity and cost of bridge repair and maintenance operation.

Description

Technical Field

[0001] This invention relates to a method for removing and treating defects in the hinge joint concrete of hollow slab beams without damaging them, belonging to the field of bridge and building construction technology. Background Technology

[0002] In bridge structures such as highway bridges, the concrete layer connecting the joints of two adjacent girder boxes is often damaged due to long-term vehicle operation and natural aging of materials. Regular repair of this concrete layer is necessary to improve bridge performance and extend its service life. Currently, due to a lack of effective and professional construction methods, the concrete layer at the joint of the two adjacent girder boxes is often simply cleaned by workers before new concrete is poured. While this meets some requirements, the labor intensity and difficulty are relatively high, significantly impacting work efficiency and costs. Furthermore, the large height, length, and narrow width of the newly poured concrete layer easily lead to poor connection stability with the original girder box surface. Additionally, the newly poured concrete layer is prone to structural defects due to uneven material distribution and drying shrinkage, severely affecting the quality of bridge repair work.

[0003] In view of this, in order to overcome the above-mentioned technical problems, the present invention proposes a bridge repair construction process to solve the above-mentioned technical problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a method for removing and treating defects in the hinge joint concrete of hollow slab beams without damaging them.

[0005] A method for removing and treating defects in the hinge joint concrete of a hollow slab beam without damaging it includes the following steps: S1, Concrete Pre-cleaning: First, drill holes in the concrete layer filling the hinge joint between the upper surfaces of two adjacent hollow slab beams using drilling equipment. The diameter of the drill holes is no larger than the width of the hinge joint. Multiple holes are drilled evenly along the axis of the hinge joint between the upper surfaces of the hollow slab beams to complete one drilling operation. Then, extrusion and reaming mechanisms are set up coaxially distributed in the drill holes and perform impact splitting and reaming operations on the drill holes. The pressure applied by the extrusion and reaming mechanisms to the concrete layer at the hole wall causes the concrete layer filling the hinge joint to crack under the extrusion force, thereby completing the crushing operation of the concrete layer within the drilling depth range. After the concrete crushing is completed, the extrusion and reaming mechanisms are retrieved, and the crushed concrete fragments are cleaned up to form a concrete repair groove on the upper end face of the hinge joint between the upper surfaces of two adjacent hollow slab beams. S2, Bottom sealing: First, the hinge joint between the lower surfaces of two adjacent hollow slab beams is sealed and reinforced using a sealing material to ensure that the structural adhesive injected into the hinge joint will not fall off. At the same time as the sealing operation, the grouting repair mechanism is inserted into the hinge joint through the sealing material. S3, Deep Repair: After completing the assembly in step S2 and the sealing material has solidified, structural adhesive is first added to the external grouting mechanism in step S2. Then, the external grouting mechanism pressurizes the structural adhesive and injects it into the remaining concrete layer filling the hinge joint through various grouting repair mechanisms. This allows the structural adhesive to fill the structural cracks and pores in the original filling concrete layer caused by long-term use, and also fill the contact surface between the original filling concrete layer and the side surface of the adjacent hollow slab beam. Finally, under pressure, the structural adhesive seeps through the cracks in the remaining concrete layer filling the hinge joint into the repair groove prepared in step S1. Finally, the structural adhesive in the repair groove is cleaned and applied to the bottom of the repair groove, thereby achieving the repair and reinforcement of the concrete layer in the hinge joint between two adjacent hollow slab beams. S4, Surface Repair: After completing step S3 and before the structural adhesive in the repair groove solidifies, pour concrete mortar into the repair groove. At the same time, use vibration to compact the concrete in the joint fully. After the concrete initially sets, start water curing until the concrete strength reaches the design requirements.

[0006] Furthermore, in step S1, when performing impact splitting and reaming operations on the drilled holes using the extrusion reaming mechanism, on the one hand, multiple extrusion reaming mechanisms can be used simultaneously to perform impact splitting and reaming operations on multiple drilled holes; on the other hand, a single extrusion reaming mechanism can be used to perform impact splitting and reaming operations on each drilled hole sequentially. During the impact splitting and reaming operation, when each drilled hole is subjected to impact splitting and reaming operations, the impact splitting and reaming operations are performed at intervals of 1 to 5 drilled holes. Simultaneously, during the impact splitting and reaming operation, each drilled hole undergoes at least two impact splitting and reaming operations to achieve the splitting radius range set by the processing technology.

[0007] Furthermore, in step S1, the extrusion and expansion mechanism includes clamps, a chisel, and a drive mechanism connection part. The upper end face of the chisel is connected to and coaxially distributed with the drive mechanism connection part. There are at least three clamps, which are evenly distributed around the axis of the chisel and abut against and slide against the outer side of the upper half of the chisel. The distance between the position where the clamps abut against the chisel and the top of the chisel is 0 to 80% of the height of the chisel.

[0008] Furthermore, the upper end face of the clamping piece is provided with a guide ring, and the outer side is provided with at least one reinforcing blade distributed parallel to its axis. The clamping piece has any one of rectangular and circular arc cross-sections, and the reinforcing blade has any one of isosceles triangle, isosceles trapezoid, and right trapezoid cross-sections. The upper end face of the clamping piece extends at least 10 mm beyond the upper end face of the drill hole, and the outer side of each clamping piece abuts against the drill hole wall through the reinforcing blade. The upper end face of the clamping piece is also connected to at least one traction steel strand through the guide ring, and is slidably connected between the guide ring and the traction steel strand. The clamping pieces are connected to each other through the traction steel strands, forming a ring structure distributed around the axis of the chisel.

[0009] Furthermore, the chisel is either a rectangular or an inverted isosceles trapezoidal columnar structure with an axial cross-section. A pre-positioning rod and a reinforcing mesh are provided on the lower end face of the chisel. The upper end face of the pre-positioning rod is connected to and coaxially distributed with the lower end face of the chisel. The lower end face is conical. The upper end face of the positioning rod is 0-10 mm higher than the bottom of the repair groove. The reinforcing mesh is embedded in the repair groove and distributed along the axial direction of the repair groove. The reinforcing mesh is connected to the upper end face of the pre-positioning rod, and adjacent reinforcing meshes are connected by binding wire. The reinforcing mesh has a rectangular, "X"-shaped, or "U"-shaped frame structure in cross-section. X Any of the frame structures.

[0010] Furthermore, after the structural adhesive is applied, the reinforcing mesh is placed into the repair groove. The distance between the reinforcing mesh and the bottom and sidewalls of the repair groove is 0-20 mm, and the upper surface of the reinforcing mesh is located at least 3 cm below the repair groove.

[0011] Furthermore, the grouting repair mechanism includes a one-way nozzle, a guide pipe, a sealing and positioning plate, and a connecting pipe head. The guide pipe is a hollow tubular structure with a guide channel coaxially distributed inside it. The end face of the guide pipe is connected to and coaxially distributed with a one-way nozzle, and the lower end face is located outside the sealing material. It is connected to the connecting pipe head and communicates with the external grouting mechanism through the connecting pipe head. There are two sealing and positioning plates, which cover the guide pipe and are distributed from top to bottom along the axis of the guide pipe. The sealing and positioning plate located at the upper position is embedded in the upper end face of the sealing material, and the sealing and positioning plate located at the lower position is embedded in the lower end face of the sealing material. The distance between the two sealing and positioning plates is 50%-80% of the thickness of the sealing material layer.

[0012] Furthermore, the flow guiding channel includes a drainage cavity and a slowing cavity, wherein the drainage cavity is connected to and coaxially distributed with two slowing cavities, and the two slowing cavities are symmetrically distributed with respect to the midpoint of the flow guiding channel.

[0013] Furthermore, in step S1, after the repair groove is opened, the repair groove is cleaned with high-pressure water at a pressure of not less than 2 atmospheres, and the remaining original concrete in the hinge joint and the corresponding cracks at the bottom of the repair groove are marked according to the seepage marks of the high-pressure water at the bottom of the repair groove.

[0014] Furthermore, the sealing material used in step S2 is epoxy mortar; the concrete mortar used in step S4 is steel fiber reinforced concrete.

[0015] The present invention has a simple construction process, good versatility and environmental applicability, and can effectively meet the needs of rapid bridge structure repair operations in various environments. It also effectively reduces the amount of materials used and the difficulty of bridge repair operations, and can effectively repair structural defects in bridge structures. This greatly improves the efficiency and quality of bridge repair operations, while also effectively reducing the labor intensity and cost of bridge repair and maintenance operations. Attached Figure Description

[0016] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments; Figure 1 This is a schematic diagram of the method of using the present invention; Figure 2 This is a partial structural diagram of the extrusion and expansion mechanism; Figure 3 This is a schematic diagram of a partial connection structure between the positioning rod and the reinforcing mesh. Figure 4 This is a schematic diagram of the grouting repair mechanism. Detailed Implementation

[0017] To facilitate the implementation of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific embodiments.

[0018] like Figure 1 As shown, a method for removing and treating defects in the hinge joint concrete of a hollow slab beam without damaging it includes the following steps: S1, Concrete Pre-cleaning: First, drill holes in the concrete layer filling the hinge joint between the upper surfaces of two adjacent hollow slab beams using drilling equipment. The hole diameter is 2-4 cm and no more than 2 / 3 of the hinge joint width, and the drilling depth is 5-12 cm. All holes are evenly distributed at intervals of 10-50 cm along the axis of the hinge joint between the upper surfaces of the hollow slab beams, completing one drilling operation. Then, install coaxially distributed extrusion reaming mechanisms within each hole, and use these mechanisms to perform impact splitting and reaming operations. The drilling depth is then increased to 10-25 cm, and the maximum borehole diameter is 1.3-2.5 times that of the initial borehole diameter. The pressure applied to the concrete layer at the borehole wall by the extrusion and expansion mechanism causes the concrete layer filling the hinge joint to crack under the extrusion force, thereby completing the crushing operation of the concrete layer within the borehole depth range. After the concrete is crushed, the extrusion and expansion mechanism is retrieved, and the crushed concrete fragments are cleaned up, thus forming a concrete repair groove on the upper end face of the hinge joint between the upper surfaces of two adjacent hollow slab beams. In step S1, when performing impact splitting and reaming operations on the drilled holes using the extrusion reaming mechanism, multiple extrusion reaming mechanisms can be used simultaneously to perform impact splitting and reaming operations on multiple drilled holes; alternatively, a single extrusion reaming mechanism can be used to perform impact splitting and reaming operations on each drilled hole sequentially. Furthermore, when performing impact splitting and reaming operations on each drilled hole, the impact splitting and reaming operations are performed at intervals of 1 to 5 drilled holes. Simultaneously, during the impact splitting and reaming operations, each drilled hole undergoes at least two impact splitting and reaming operations to achieve the splitting radius range set by the processing technology.

[0019] In this embodiment, in step S1, after the repair groove is opened, the repair groove is cleaned with high-pressure water with a pressure of not less than 2 atmospheres, and the cracks corresponding to the remaining original concrete in the hinge joint and the bottom of the repair groove are marked according to the seepage traces of the high-pressure water at the bottom of the repair groove.

[0020] like Figure 2 As shown in Figure 3, in step S1, the extrusion and reaming mechanism includes clamping plates 1, a chisel 2, and a drive mechanism connecting part 3. The upper end face of the chisel 2 is connected to and coaxially distributed with the drive mechanism connecting part 3. There are at least three clamping plates 1, which are evenly distributed around the axis of the chisel 2 and abut against and slidably connected to the outer side of the upper half of the chisel 2. The distance between the abutting position of the clamping plate 1 and the top of the chisel 2 and the distance between them are 0 to 80% of the height of the chisel 2. In this embodiment, the drive mechanism connecting part 3 is used to connect with impact equipment such as a pneumatic pick, and is used to move downward under the drive of the pneumatic pick or other impact equipment, so that the clamping plates 1 can extrude and crack the drill hole.

[0021] It is important to note that the upper end face of the clamping piece 1 is provided with a guide ring 11, and the outer side is provided with at least one reinforcing blade 12 distributed parallel to its axis. The clamping piece 1 can have a cross-section of either rectangular or circular arc, and the width of the upper end face of the clamping piece 1 is 1 to 5 times the width of the lower end face. The cross-section of the reinforcing blade 12 can be any of an isosceles triangle, an isosceles trapezoid, or a right trapezoid, and the height of the reinforcing blade 12 is not less than 5 mm. The height of the reinforcing blade 12 located on the upper end face of the clamping piece 1 is also specified. The height of the clamping piece 1 is 1 to 2.5 times the height of the lower end face of the clamping piece 1. The upper end face of the clamping piece 1 extends at least 10 mm beyond the upper end face of the drill hole. The outer side of each clamping piece 1 abuts against the drill hole wall through the reinforcing blade 12. The upper end face of the clamping piece 1 is also connected to at least one traction steel strand 13 through the guide ring, and is slidably connected to the traction steel strand 13 through the guide ring 11. Each clamping piece 1 is connected to each other through the traction steel strand 13, forming a ring structure distributed around the axis of the chisel 2.

[0022] As the chisel is driven downward by the impact device, clamping plates apply pressure to the borehole wall under the downward force of the chisel, thereby destroying the concrete layer structure. While destroying the concrete layer, the reinforced blade can also directly cut and destroy the concrete layer, improving the efficiency of concrete layer removal. At the same time, the clamping plates are connected and positioned by the traction steel strand, improving the stability of the clamping plate assembly and positioning during driving operations, and also preventing the clamping plates from being lost during construction. S2, Bottom Sealing: Concrete may detach between the lower surfaces of two adjacent hollow slab beams, creating a hinge joint between them. Therefore, a sealing material is first used to seal and reinforce the hinge joint between the lower surfaces of the two adjacent hollow slab beams. Simultaneously, a grouting repair mechanism is inserted into the hinge joint through the sealing material, with the upper end of the grouting repair mechanism positioned 0-5 cm above the contact surface between the sealing material and the concrete in the hinge joint, and the lower end positioned outside the sealing material. The grouting repair mechanisms are connected in parallel and communicated with an external grouting mechanism via pipes, with a spacing of 30-100 cm between adjacent grouting repair mechanisms.

[0023] In this embodiment, there is a hinge joint between the lower surfaces of two adjacent hollow slab beams. The hinge joint has a large length-to-width ratio, that is, the width is narrow and the length is relatively long. Therefore, when filling the bottom sealing material, there is no need to set a template below the hinge joint. The bottom sealing material can adhere to the hinge joint by its own adhesiveness and will not fall off.

[0024] like Figure 4As shown, in this embodiment, the grouting repair mechanism includes a one-way nozzle 41, a guide pipe 42, a sealing and positioning plate 43, and a connecting pipe head 44. The guide pipe 42 is a hollow tubular structure with a guide channel 45 coaxially distributed inside it. The end face of the guide pipe 42 is connected to and coaxially distributed with a one-way nozzle 41, and the lower end face is located outside the sealing material. It is connected to the connecting pipe head 44 and communicates with the external grouting mechanism through the connecting pipe head 44. There are two sealing and positioning plates 43, which cover the guide pipe 42 and are distributed from top to bottom along the axis of the guide pipe 42. The sealing and positioning plate 43 located at the upper position is embedded in the upper end face of the sealing material, and the sealing and positioning plate 43 located at the lower position is embedded in the lower end face of the sealing material. The distance between the two sealing and positioning plates 43 is 50%-80% of the thickness of the sealing material layer.

[0025] In this embodiment, the grouting repair mechanism is directly cast into the hinge joint between the two hollow slab beams, so that the grouting repair mechanism can not only play the role of injecting structural adhesive; but also act as a skeleton in the hinge joint. The grouting repair mechanism and the sealing material solidify into one, thereby enhancing the repair effect.

[0026] Meanwhile, the flow guiding channel 45 includes a flow guiding cavity 451 and a flow slowing cavity 452, wherein the flow guiding cavity 451 is connected to and coaxially distributed with the two flow slowing cavities 452, and the maximum diameter of the two flow slowing cavities 452 is 1.5 to 3 times the diameter of the flow guiding cavity 451. At the same time, the two flow slowing cavities 452 are symmetrically distributed around the midpoint of the flow guiding channel 45, and the distance between the two flow slowing cavities 452 is 50% to 90% of the length of the flow guiding channel 45.

[0027] By using the diameter difference between the drainage cavity and the slow-flow cavity, the cross-sectional structure of the grout undergoes changes as it flows through the drainage channel. This buffers the grouting pressure to some extent, preventing excessive pressure from causing secondary damage to the concrete structure of the bridge. It also effectively repairs the volume changes of the grout structure during solidification, such as expansion or shrinkage, thus improving the grout sealing quality. Furthermore, the diameter difference between the drainage cavity and the slow-flow cavity where the grout remains effectively in the drainage channel prevents backflow and leakage after pressure loss, thereby further improving the grout sealing quality.

[0028] S3, Deep Repair: After completing the assembly in step S2 and the sealing material has solidified, structural adhesive is first added to the external grouting mechanism in step S2. Then, the external grouting mechanism pressurizes the structural adhesive and injects it into the remaining concrete layer filling the hinge joint through various grouting repair mechanisms. This allows the structural adhesive to fill the structural cracks and pores in the original filling concrete layer caused by long-term use, and also fill the contact surface between the original filling concrete layer and the side surface of the adjacent hollow slab beam. Finally, under pressure, the structural adhesive seeps through the cracks in the remaining concrete layer filling the hinge joint into the repair groove prepared in step S1. Finally, the structural adhesive in the repair groove is cleaned, and the structural adhesive in the repair groove is applied to the bottom of the repair groove, thereby achieving the repair and reinforcement of the concrete layer in the hinge joint between two adjacent hollow slab beams.

[0029] In this embodiment, after the sealing material solidifies, it can seal the bottom hinge joint between two adjacent hollow slab beams, thereby preventing the subsequent application of structural adhesive from falling out of the hinge joint and ensuring more efficient application of structural adhesive.

[0030] In a further optimized manner, after the structural adhesive is applied, the reinforcing mesh is placed into the repair groove. The distance between the reinforcing mesh 22 and the bottom and sidewalls of the repair groove is 0-20 mm, and the upper surface of the reinforcing mesh 22 is located at least 3 cm below the repair groove.

[0031] Furthermore, the chisel 2 is a columnar structure with an axial cross-section of either a rectangle or an inverted isosceles trapezoid. The lower end face of the chisel 2 is further provided with a pre-positioning rod 21 and a reinforcing mesh 22. The upper end face of the pre-positioning rod 21 is connected to and coaxially distributed with the lower end face of the chisel 2. The lower end face is a conical structure. The upper end face of the positioning rod 21 is 0-10 mm higher than the bottom of the repair groove. The reinforcing mesh 22 is embedded in the repair groove and distributed along the axial direction of the repair groove. The reinforcing mesh 22 is connected to the upper end face of the pre-positioning rod 21, and adjacent reinforcing meshes 22 are connected by binding wires 23. The reinforcing mesh 22 has a cross-section of a rectangle, an "X" shape, or a "U" frame structure. X Any of the frame structures.

[0032] By setting positioning rods and reinforcing mesh, when pouring new concrete, on the one hand, the reinforcing mesh forms reinforcing ribs in the newly poured concrete layer, thereby improving the structural strength of the newly poured concrete; on the other hand, it enables the newly poured concrete to reliably connect with the remaining filling concrete layer in the hinge joint between the positioning rods and reinforcing mesh and the upper surface of the original slab beam, improving the connection stability and structural strength between the newly poured concrete layer and the original concrete layer and the bottom grouting reinforcing slurry layer.

[0033] S4, Surface Repair: After completing step S3 and before the structural adhesive in the repair groove solidifies, pour concrete mortar into the repair groove. At the same time, use vibration to compact the concrete in the joint fully. After the concrete initially sets, start water curing until the concrete strength reaches the design requirements.

[0034] In this embodiment, the sealing material used in step S2 is epoxy mortar; the concrete mortar used in step S4 is steel fiber reinforced concrete.

[0035] The present invention has a simple construction process, good versatility and environmental applicability, and can effectively meet the needs of rapid bridge structure repair operations in various environments. It also effectively reduces the amount of materials used and the difficulty of bridge repair operations, and can effectively repair structural defects in bridge structures. This greatly improves the efficiency and quality of bridge repair operations, while also effectively reducing the labor intensity and cost of bridge repair and maintenance operations.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A method for removing and treating defects in the hinge joint concrete of a hollow slab beam without damaging it, characterized in that, The method for removing and treating defects in the hinge joint concrete of hollow slab beams without damaging them includes the following steps: S1, Concrete Pre-cleaning: First, drill holes in the concrete layer filling the hinge joint between the upper surfaces of two adjacent hollow slab beams using drilling equipment. The diameter of the drill holes is no larger than the width of the hinge joint. Multiple holes are evenly arranged along the axis of the hinge joint between the upper surfaces of the hollow slab beams to complete one drilling operation. Then, extrusion and expansion mechanisms are set up coaxially distributed in the drill holes and perform impact splitting and expansion operations on the drill holes. The pressure applied by the extrusion and expansion mechanisms to the concrete layer at the hole wall causes the concrete layer filling the hinge joint to crack under the extrusion force, thereby completing the crushing operation of the concrete layer within the drilling depth range. After the concrete crushing is completed, the extrusion and expansion mechanisms are retrieved, and the crushed concrete fragments are cleaned up to form a concrete repair groove on the upper end face of the hinge joint between the upper surfaces of two adjacent hollow slab beams. S2, Bottom sealing: First, the hinge joint between the lower surfaces of two adjacent hollow slab beams is sealed and reinforced using a sealing material to ensure that the structural adhesive injected into the hinge joint will not fall off. At the same time as the sealing operation, the grouting repair mechanism is inserted into the hinge joint through the sealing material. S3, Deep Repair: After completing the assembly in step S2 and the sealing material has solidified, structural adhesive is first added to the external grouting mechanism in step S2. Then, the external grouting mechanism pressurizes the structural adhesive and injects it into the remaining concrete layer filling the hinge joint through various grouting repair mechanisms. This allows the structural adhesive to fill the structural cracks and pores in the original filling concrete layer caused by long-term use, and also fill the contact surface between the original filling concrete layer and the side surface of the adjacent hollow slab beam. Finally, under pressure, the structural adhesive seeps through the cracks in the remaining concrete layer filling the hinge joint into the repair groove prepared in step S1. Finally, the structural adhesive in the repair groove is cleaned and applied to the bottom of the repair groove, thereby achieving the repair and reinforcement of the concrete layer in the hinge joint between two adjacent hollow slab beams. S4, Surface repair: After completing step S3 and before the structural adhesive in the repair groove solidifies, pour concrete mortar into the repair groove. At the same time, use vibration to compact the concrete in the joint. After the concrete initially sets, start water curing until the concrete strength reaches the design requirements. The grouting repair mechanism includes a one-way nozzle, a guide pipe, a sealing and positioning plate, and a connecting pipe head. The guide pipe is a hollow tubular structure with a guide channel coaxially distributed inside. The end face of the guide pipe is connected to and coaxially distributed with a one-way nozzle. The lower end face is located outside the sealing material and is connected to the connecting pipe head, which in turn connects to the external grouting mechanism. There are two sealing and positioning plates, which cover the guide pipe and are distributed from top to bottom along the axis of the guide pipe. The sealing and positioning plate located at the upper position is embedded in the upper end face of the sealing material, and the sealing and positioning plate located at the lower position is embedded in the lower end face of the sealing material. The distance between the two sealing and positioning plates is 50%-80% of the thickness of the sealing material layer.

2. The method for removing and treating defects in the hinge joint concrete of a hollow slab beam without damaging it, as described in claim 1, is characterized in that... In step S1, when performing impact splitting and reaming operations on the drilled holes using the extrusion reaming mechanism, multiple extrusion reaming mechanisms can be used simultaneously to perform impact splitting and reaming operations on multiple drilled holes; alternatively, a single extrusion reaming mechanism can be used to perform impact splitting and reaming operations on each drilled hole sequentially. Furthermore, when performing impact splitting and reaming operations on each drilled hole, the impact splitting and reaming operations are performed at intervals of 1 to 5 drilled holes. Simultaneously, during the impact splitting and reaming operations, each drilled hole undergoes at least two impact splitting and reaming operations to achieve the splitting radius range set by the processing technology.

3. A method for removing and treating defects in the hinge joint concrete of a hollow slab beam without damaging it, as described in claim 1 or 2, characterized in that... In step S1, the extrusion and expansion mechanism includes clamps, a chisel, and a drive mechanism connection part. The upper end face of the chisel is connected to the drive mechanism connection part and coaxially distributed. There are at least three clamps, which are evenly distributed around the axis of the chisel and abut against the outer side of the upper half of the chisel and are slidably connected. The distance between the position where the clamps abut against the chisel and the top of the chisel is 0 to 80% of the height of the chisel.

4. The method for removing and treating defects in the hinge joint concrete of a hollow slab beam without damaging it, as described in claim 3, is characterized in that... The upper end face of the clamping piece is provided with a guide ring, and the outer side is provided with at least one reinforcing blade distributed parallel to its axis. The clamping piece can be any of the rectangular or circular arc structure in cross-section. The cross-section of the reinforcing blade can be any of the isosceles triangle, isosceles trapezoid, or right trapezoid. The upper end face of the clamping piece extends at least 10 mm beyond the upper end face of the drill hole, and the outer side of each clamping piece abuts against the drill hole wall through the reinforcing blade. The upper end face of the clamping piece is also connected to at least one traction steel strand through the guide ring, and is slidably connected between the guide ring and the traction steel strand. The clamping pieces are connected to each other through the traction steel strand, forming a ring structure distributed around the axis of the chisel.

5. The method for removing and treating defects in the hinge joint concrete of a hollow slab beam without damaging it, as described in claim 3, is characterized in that... The chisel is either a rectangular or an inverted isosceles trapezoidal column with an axial cross-section. A pre-positioning rod and a reinforcing mesh are provided on the lower end face of the chisel. The upper end face of the pre-positioning rod is connected to and coaxially distributed with the lower end face of the chisel. The lower end face is conical. The upper end face of the pre-positioning rod is 0-10 mm higher than the bottom of the repair groove. The reinforcing mesh is embedded in the repair groove and distributed along the axial direction of the repair groove. The reinforcing mesh is connected to the upper end face of the pre-positioning rod, and adjacent reinforcing meshes are connected by binding wire. The reinforcing mesh has a rectangular, "X"-shaped, or "U"-shaped frame structure in cross-section. X Any of the frame structures.

6. The method for removing and treating defects in the hinge joint concrete of a hollow slab beam without damaging it, as described in claim 5, is characterized in that... After the structural adhesive is applied, the reinforcing mesh is placed into the repair groove. The distance between the reinforcing mesh and the bottom and sidewalls of the repair groove is 0-20 mm, and the upper surface of the reinforcing mesh is located at least 3 cm below the repair groove.

7. The method for removing and treating defects in the hinge joint concrete of a hollow slab beam without damaging it, as described in claim 1, is characterized in that... The flow channel includes a drainage cavity and a slow-flow cavity, wherein the drainage cavity is connected to and coaxially distributed with two slow-flow cavities, and the two slow-flow cavities are symmetrically distributed with respect to the midpoint of the flow channel.

8. The method for removing and treating defects in the hinge joint concrete of a hollow slab beam without damaging it, as described in claim 1, is characterized in that... In step S1, after the repair trench is opened, the repair trench is cleaned with high-pressure water at a pressure of not less than 2 atmospheres, and the cracks corresponding to the remaining original concrete in the joint and the bottom of the repair trench are marked according to the seepage marks of the high-pressure water at the bottom of the repair trench.

9. The method for removing and treating defects in the hinge joint concrete of a hollow slab beam without damaging it, as described in claim 1, is characterized in that... The sealing material used in step S2 is epoxy mortar; the concrete mortar used in step S4 is steel fiber reinforced concrete.

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