Hollow slab beam end sealing process

Abstract

This application relates to a process for sealing the ends of hollow slab beams, comprising the following steps: Cavity cleaning: Drill holes in the hollow slab beam, inject water into the cavity of the hollow slab beam, observe whether there is leakage at the end of the hollow slab beam, and clean the debris in the cavity; Sealing: If leakage occurs at the end of the hollow slab beam; if the leaking end of the hollow slab beam is located on the bridge abutment, extend a delivery pipe into the gap between the hollow slab beam and the bridge abutment, inject sealing material into the sealing space between the hollow slab beam and the bridge abutment, and the sealing material seals the sealing space at the end of the hollow slab beam, thus completing the construction; if the leaking end of the hollow slab beam is located on the bridge pier, extend a delivery pipe into the gap between the ends of two adjacent hollow slab beams, inject sealing material into the sealing space between the ends of two adjacent hollow slab beams, and the sealing material seals the sealing space at the end of the hollow slab beam, thus completing the construction. This allows for convenient and quick sealing of the ends of hollow slab beams.

Description

Technical Field

[0001] This application relates to the field of bridge reinforcement technology, and in particular to a process for sealing the ends of hollow slab beams. Background Technology

[0002] With the rapid improvement of precast building component production technology, precast building components are playing an increasingly important role in various fields of infrastructure construction, especially in the bridge sector. The technology for precast building components is very mature, and precast hollow slab beam bridges are widely used in bridge construction due to their simple structure, ease of standardized production and construction, and convenient transportation and hoisting. Hollow slab beams are beams made of cast concrete and steel reinforcement. They contain cavities and have end caps at both ends. However, in actual construction, some manufacturers cut corners, resulting in missing end caps at the ends of the hollow slab beams, or cracks appearing on the end caps after long-term use. The current conventional construction process for hollow slab beams involves hoisting multiple hollow slab beams one by one onto the supports of the abutments or piers, and then laying the bridge deck pavement layer on top of the hollow slab beams.

[0003] Chinese Patent Application Publication No. CN114808761A discloses a grouting and filling reinforcement structure and method for the ends of a hollow slab beam. The reinforcement method includes: step S110, opening a long groove along the length of the hollow slab beam body on the bottom wall of the hollow beam body; step S120, extending two sealing plates into the cavity through the long groove and rotating them 90° to close the cross-section of the cavity, forming a sealing cavity between the two sealing plates; step S130, injecting foaming agent into the sealing cavity.

[0004] Regarding the aforementioned reinforcement structures and methods, in actual construction, when cracks are close to abutments or piers, the abutments or piers will obstruct the opening of long slots, making it difficult to seal the ends of the hollow slab beams, which in turn makes it difficult to seal the cracks on the hollow slab beams. Summary of the Invention

[0005] To address the problem of difficulty in sealing the ends of hollow slab beams, this application provides a process for sealing the ends of hollow slab beams.

[0006] The technical solution for sealing the end of a hollow slab beam provided in this application is as follows:

[0007] A process for sealing the ends of a hollow slab beam includes the following steps:

[0008] Cavity cleaning: Drill holes in the hollow slab beam, inject water into the cavity of the hollow slab beam, observe whether there is water leakage at the end of the hollow slab beam, and clean the debris in the cavity.

[0009] Sealing: If water leakage occurs at the end of the hollow slab beam;

[0010] If the leaking hollow slab beam end is located on the bridge abutment, extend the delivery pipe into the gap between the hollow slab beam and the bridge abutment, inject the sealing material into the sealing space between the hollow slab beam and the bridge abutment, and the sealing material will seal the sealing space at the end of the hollow slab beam, thus completing the construction.

[0011] If the leaking hollow slab beam end is located on the bridge pier, the delivery pipe is extended into the gap between the ends of the two hollow slab beams in the two adjacent spans. The sealing material is then injected into the sealing space between the ends of the two hollow slab beams in the two adjacent spans. The sealing material will seal the sealing space at the end of the hollow slab beam, and the construction will be completed.

[0012] By adopting the above technical solution, during construction, holes are first drilled in the bottom wall of the hollow slab beam, water is injected into the cavity, the water in the cavity is cleaned, and the end of the hollow slab beam is observed for leakage. If leakage is found, a delivery pipe is placed between the hollow slab beam and the abutment, or in the gap between the ends of two adjacent hollow slab beams on the pier. Leak-sealing material is injected into the gap, and the cavity of the hollow slab beam is sealed by the leak-sealing device. This allows for convenient and quick sealing of the end of the hollow slab beam, and also facilitates the sealing of cracks in the hollow slab beam itself.

[0013] In one specific implementation scheme, during the "sealing" step, after the delivery pipeline has been sprayed with sealing material once, the delivery pipeline is moved to the side where no sealing material has been sprayed, and the delivery pipeline continues to deliver sealing material until the end of the hollow slab beam is completely sealed.

[0014] By adopting the above technical solution, when the amount of sealing material delivered into the conveying pipeline at one time is small, it is not possible to completely seal the end of the hollow slab beam. Therefore, the sealing material can be delivered multiple times through the conveying pipeline, which can adapt to hollow slab beams with different cross-sectional areas.

[0015] In one specific implementation scheme, during the "sealing" step, if the end cap of the hollow slab beam is lost, the sealing material seeps into the cavity at the end of the hollow slab beam.

[0016] Or if there are water seepage cracks in the end caps of the hollow slab beams, the sealing material will seep into the water seepage cracks;

[0017] If there are water seepage cracks in the end caps of the hollow slab beam, then seal the end face of the hollow slab beam with sealing material.

[0018] By adopting the above technical solution, when the hollow slab beam ends are hollow, the sealing material seals the gap between the hollow slab beam and the ends of two adjacent hollow slab beams on the abutment or pier, and fills the ends of the hollow slab beam to seal the cavity.

[0019] When the hollow slab beam has a plug at the end, but there are water seepage cracks in the plug, the sealing material seals the gap between the hollow slab beam and the ends of two adjacent hollow slab beams on the abutment or pier, and fills the water seepage cracks in the plug, thereby sealing the end of the hollow slab beam.

[0020] When there are water seepage cracks on the end caps of hollow slab beams, the sealing material seals the gap between the ends of the hollow slab beams and the beams of two adjacent spans on the abutment or pier, and fills the water seepage cracks on the end caps, thereby sealing the ends of the hollow slab beams.

[0021] In one specific implementation scheme, after the "cleaning" step and before the "sealing" step, the following step is also included: leak sealing;

[0022] Near the hinge joint of the hollow slab beam to be sealed, spray the sealing material between the hollow slab beam and the abutment or between the ends of two adjacent hollow slab beams on the pier, so that the sealing material comes into contact with the bridge deck pavement.

[0023] By adopting the above technical solution, the sealing material is first sprayed between the hollow slab beam and the abutment or between the ends of two adjacent hollow slab beams on the pier. The sealing material seals both ends of the hollow slab beam to be sealed, which can reduce the possibility of the sealing material at the ends of the hollow slab beam overflowing outward.

[0024] In one specific feasible implementation, during the "seal-sealing" step, sealant is sprayed into the space between the hollow slab beam and the abutment, or into the space between the ends of two adjacent hollow slab beams on the pier, near the hinge joints on both sides of the hollow slab beam to be sealed, and the sealant comes into contact with the bridge deck pavement.

[0025] By adopting the above technical solution, the gaps between the hollow slab beam and the abutment or between the ends of two adjacent hollow slab beams on the pier are sealed at the hinge joints on both sides of the hollow slab beam to be sealed, thereby improving the convenience of sealing the ends of the hollow slab beam.

[0026] In one specific implementation, during the “sealing” step, when the sealing material falls onto the abutment or pier, the excess material on the abutment or pier is removed.

[0027] By adopting the above technical solutions, excess materials on bridge abutments or piers can be removed, thereby improving the aesthetics of the bridge abutments or piers.

[0028] In one specific feasible implementation, the leak-sealing material in the "sealing" step is a foamed material.

[0029] By adopting the above technical solution, foamed material is sprayed through a delivery pipeline between the hollow slab beam and the abutment, or sprayed on the gap between the ends of two adjacent hollow slab beams on the pier. The foamed material foams to form a sealing layer, thereby sealing the ends of the hollow slab beam.

[0030] In one specific implementation scheme, in the "blocking" step, a material conveying device is first placed on the bridge pier or abutment, the material conveying device being used to connect to the conveying pipeline;

[0031] The material conveying device includes a movable frame installed on a bridge pier or bridge abutment, a movable pipe for connecting to a conveying pipeline is slidably installed inside the movable frame, a power component for driving the movable pipe to move is installed on the movable frame, and a spray pipe for spraying sealing material is installed on the movable pipe.

[0032] By adopting the above technical solution, during construction, the conveying pipeline is connected to the mobile pipeline. The conveying pipeline injects the sealing material into the mobile pipeline, and the spraying pipe sprays the sealing material out. Then, the power component drives the mobile pipeline to move, moving the spraying pipe to the area to be sealed. In this way, the sealing material can be successfully sprayed between the hollow slab beam and the abutment or between the ends of two adjacent hollow slab beams on the pier.

[0033] In one specific implementation, the power assembly includes a power motor mounted on a movable frame, a lead screw coaxially mounted on the motor shaft of the power motor, a slider threaded onto the lead screw, and the movable pipe connected to the slider.

[0034] By adopting the above technical solution, during construction, after the spray pipe has delivered one batch of sealing material, the power motor drives the lead screw to rotate, which in turn drives the slider to move, thereby moving the moving pipe and the spray pipe. This allows for convenient and quick movement of the moving pipe and the spray pipe, improving the ease of operation.

[0035] In one specific implementation scheme, the movable pipe is provided with a ball joint connector at one end near the spray pipe, and the spray pipe is provided with a connecting ball joint at one end near the movable pipe, and the connecting ball joint is ball-hinged with the ball joint connector.

[0036] The movable frame is provided with an opening for the spray pipe to rotate. The opening is located between the hollow slab beam and the bridge abutment or between two adjacent hollow slab beams. The movable frame is provided with two airbags located at the opening. The airbags are provided with an inflation port and an deflation port. The deflation port is provided with an electric valve. The spray pipe is located between the two airbags. The airbags are provided with elastic sheets.

[0037] The mobile frame is rotatably equipped with two opposing rotating rods, which are located below the airbag. The rotating rods are coaxially mounted with rotating wheels, and the two rotating wheels are connected by a belt. The mobile frame is equipped with a rotating motor, and the motor shaft of the rotating motor is coaxially connected to one of the rotating rods.

[0038] Each of the rotating rods is provided with at least two rotating gears, and the movable frame is provided with a driven gear that meshes with the rotating gears. Both the rotating gears and the driven gears are provided with connecting rods. A connecting rod is hinged to the connecting rod, and a limit rod is hinged to the connecting rod. The end of the limit rod away from the connecting rod is rotatably connected to the movable frame, and the end of the connecting rod away from the limit rod is used to hold the clamping block of the elastic sheet.

[0039] By adopting the above technical solution, when it is necessary to control the spray direction of the spray pipe, one or two airbags are inflated. The airbags inflate and expand, which can push the connecting ball head on the spray pipe to rotate around the ball head connecting seat, thereby controlling the nozzle of the spray pipe to face the hollow slab beam or bridge abutment.

[0040] If the blockage material flows downwards, the airbag will absorb the blockage material instead of the abutment or pier. After construction is completed, the air vent is opened using an electric valve to release the gas in the airbag. At the same time, the motor drives the rotating rod to rotate, which in turn drives the rotating wheel and belt to rotate, which in turn drives the rotating gear to rotate, which in turn drives the driven gear to rotate, which in turn drives the connecting rod to rotate. Because the limiting rod limits the connecting rod, the connecting rod can be pulled open, and the clamping block can release the elastic plate. The airbag adheres to the blockage material, which can minimize the need to remove the blockage material from the abutment or pier after construction is completed.

[0041] In summary, this application includes at least one of the following beneficial technical effects: During construction, holes are first drilled in the bottom wall of the hollow slab beam, water is injected into the cavity, the water in the cavity is cleaned, and it is observed whether the end of the hollow slab beam leaks. If there is leakage, a delivery pipe is placed between the hollow slab beam and the abutment or in the gap between the ends of two adjacent hollow slab beams on the pier. Leak-sealing material is injected into the gap, and the cavity of the hollow slab beam is sealed by the leak-sealing device. This allows for convenient and quick sealing of the end of the hollow slab beam, which also facilitates the sealing of cracks in the hollow slab beam itself. Attached Figure Description

[0042] Figure 1 This is a structural schematic diagram of a hollow slab beam end sealing process according to Embodiment 1 of this application.

[0043] Figure 2 It is along Figure 1 Sectional view along the AA direction.

[0044] Figure 3 This is a structural schematic diagram of a hollow slab beam end sealing process according to Embodiment 2 of this application.

[0045] Figure 4 It is along Figure 3 Sectional view along the BB direction.

[0046] Figure 5 This is a structural schematic diagram of a hollow slab beam end sealing process according to Embodiment 3 of this application.

[0047] Figure 6 It is along Figure 5 A cross-sectional view along the CC direction.

[0048] Figure 7 for Figure 6 Enlarged view of section A.

[0049] Figure 8 This is a schematic diagram illustrating the structure of the movable box in Example 3.

[0050] Figure 9 The diagram illustrates the structure of the power assembly in Embodiment 3.

[0051] Figure 10 for Figure 9 Enlarged view of section B in the middle.

[0052] Explanation of reference numerals in the attached drawings: 1. Hollow slab beam; 2. Cavity; 3. Gap; 5. Bridge deck pavement layer; 6. Hinge joint; 7. Material conveying device; 70. Moving frame; 71. Moving box; 73. Moving pipe; 74. Spraying pipe; 75. Ball joint connector; 76. Through hole; 77. Connecting ball joint; 78. Through hole; 79. Opening; 700. Airbag; 701. Inflation port; 702. Deflator port; 703. Electric valve; 704. Elastic sheet; 705. Rotating rod; 706. Rotating wheel 707. Belt; 708. Rotating motor; 709. Rotating gear; 710. Driven gear; 711. Connecting rod; 712. Linkage rod; 713. Limiting rod; 714. Clamping block; 715. Drive motor; 716. Drive rod; 717. Limiting plate; 718. Through groove; 8. Power assembly; 80. Power motor; 81. Lead screw; 82. Slider; 83. Moving block; 9. Bridge abutment; 10. Bridge pier; 11. Leak-sealing layer; 12. Sealing space; 13. Sealing layer. Detailed Implementation

[0053] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0054] This application discloses a process for sealing the ends of hollow slab beams.

[0055] Reference Figure 1 and Figure 2 A process for sealing the ends of a hollow slab beam includes the following steps:

[0056] S1. Cleaning the cavity: Drill holes in the hollow slab beam 1 and inject water into the cavity 2 of the hollow slab beam 1. After soaking the cavity 2 of the hollow slab beam 1 with water, the debris inside the hollow slab beam 1 will fall off the hollow slab beam 1. Then rinse the debris in the cavity 2 clean. While soaking the cavity 2 of the hollow slab beam 1, observe whether there is any leakage at the end of the hollow slab beam 1.

[0057] S2. Leakage sealing: If water leakage occurs at the end of hollow slab beam 1;

[0058] At the hinge joint 6 near the hollow slab beam 1 to be sealed, the delivery pipe is horizontally inserted into the gap 3 between the hollow slab beam 1 and the abutment 9. Then, the delivery pipe is rotated so that the pipe opening is exposed from the sealing space 12 between the abutment 9 and the hollow slab beam 1. In this embodiment, the delivery pipe is an L-shaped pipe, and the sealing material is a foam material. Specifically, the foam material is polyurethane. The foam material foams to form a sealing layer 11, which contacts the bridge deck pavement layer 5. In this embodiment, the gaps 3 at the hinge joints 6 on both sides of the hollow slab beam 1 to be sealed are sealed.

[0059] In other embodiments, the gap 3 at the hinge joint 6 on one side of the hollow slab beam 1 may be sealed only.

[0060] S3. Sealing: If the end of the hollow slab beam 1 that is leaking is located on the bridge abutment 9, extend the conveying pipe horizontally into the gap 3 between the hollow slab beam 1 and the bridge abutment 9, then rotate the conveying pipe to expose the pipe end from the sealing space 12 between the bridge abutment 9 and the hollow slab beam 1. Inject the sealing material into the sealing space 12 between the hollow slab beam 1 and the bridge abutment 9. The sealing material foams to form a sealing layer 13, and the sealing material seals the end of the hollow slab beam 1.

[0061] If there is no end cap at the end of the hollow slab beam 1, the foamed sealing material can be directly filled into the cavity 2 at the end of the hollow slab beam 1 to achieve sealing.

[0062] If the end cap of the hollow slab beam 1 has a water seepage crack, the foamed sealing material will directly overflow into the water seepage crack to achieve the sealing.

[0063] If the plug at the end of the hollow slab beam 1 has a water seepage crack, in this embodiment, the water seepage crack is a gap that the foamed material cannot penetrate, and the foamed sealing material directly overflows into the water seepage crack to achieve sealing.

[0064] In other embodiments, when the cross-sectional area of ​​the hollow slab beam 1 to be sealed is large, and the sealing material is insufficient to seal the cavity 2 of the hollow slab beam 1, the conveying pipe is moved to the side where the sealing material has not been sprayed, and the conveying pipe continues to convey the sealing material. The sealing material foams to form a sealing layer 13, and the sealing layer 13 adheres to the adjacent sealing layer 13 until the end of the hollow slab beam 1 is completely sealed.

[0065] S4. Cleaning: After the end of the hollow slab beam 1 is sealed, when the sealing material falls onto the bridge abutment 9, remove the excess foam material on the bridge abutment 9 to maintain the aesthetics of the bridge abutment 9.

[0066] Example 2

[0067] Reference Figure 3 and Figure 4 The difference between this embodiment and Embodiment 1 is that:

[0068] S2. Leakage sealing: If water leaks at the end of hollow slab beam 1, and the leaking end of hollow slab beam 1 is located on pier 10;

[0069] At the hinge joint 6 near the hollow slab beam 1 to be sealed, the sealing material is sprayed into the sealing space 12 between the beam ends of two adjacent hollow slab beams 1 on the same pier 10 using a delivery pipeline. The sealing material foams to form a sealing layer 11.

[0070] S3. Sealing: The delivery pipe is inserted into the sealing space 12 between the ends of two hollow slab beams 1 in two adjacent spans located on the same pier 10. The sealing material is injected into the sealing space 12 between the ends of two hollow slab beams 1 in two adjacent spans. The sealing material foams to form a sealing layer 13, which can seal the ends of the hollow slab beams 1.

[0071] S4. Cleaning: After the end of the hollow slab beam 1 is sealed, when the sealing material falls onto the pier 10, remove the excess foam material on the pier 10 to maintain the aesthetics of the pier 10.

[0072] Example 3

[0073] Reference Figure 5 The difference between this embodiment and embodiment 1 is that in the "blocking" step, the material conveying device 7 is first placed on the bridge abutment 9, and the material conveying device 7 is used to connect to the conveying pipeline.

[0074] In other embodiments, when the hollow slab beam to be sealed is located on the pier 10, the material conveying device 7 is placed on the pier 10.

[0075] Reference Figure 6 and Figure 7The material conveying device 7 includes a movable frame 70 mounted on the bridge platform 9. The movable frame 70 includes a movable box 71. The movable box 71 has a through groove 718 on one side near the edge of the bridge platform 9. The top wall of the movable box 71 has an opening 79. In this embodiment, the opening 79 faces the sealing space 12.

[0076] A movable pipe 73 for connecting to a conveying pipe is slidably provided in the through groove 718, and a power component 8 for driving the movable pipe 73 to move is provided in the through groove 718.

[0077] The movable pipe 73 is provided with a ball joint connector 75 at one end near the opening 79. The ball joint connector 75 is provided with a through hole 76 communicating with the inner cavity of the movable pipe 73. A connecting ball 77 is connected to the ball joint connector 75. The connecting ball 77 is provided with a through hole 78 communicating with the through hole 76. The end of the connecting ball 77 away from the ball joint connector 75 is provided with a spray pipe 74. The axis of the spray pipe 74, the axis of the through hole 78 and the axis of the through hole 76 are collinear.

[0078] The movable box 71 is equipped with two drive motors 715 arranged opposite to each other. The motor shaft of the drive motor 715 is coaxially equipped with a drive rod 716. The drive rod 716 is equipped with a limiting plate 717. The limiting plate 717 is located above the opening 79. The two limiting plates 717 are arranged vertically opposite to each other. The limiting plate 717 is used to close the sealing space 12 between the hollow slab beam 1 and the bridge abutment 9.

[0079] In other embodiments, the limiting plate 717 is used to close the sealing space 12 between two adjacent hollow slab beams 1.

[0080] refer to Figure 7 and Figure 8 The power assembly 8 includes a power motor 80 mounted on a movable frame 70. The motor shaft of the power motor 80 is coaxially provided with a lead screw 81. The lead screw 81 is arranged along the length direction of the opening 79. A slider 82 is threadedly connected to the lead screw 81. The slider 82 slides on the bottom wall of the through groove 718. A movable block 83 connected to the slider 82 is provided on the movable pipe 73.

[0081] The movable box 71 contains two airbags 700. The airbags 700 are arranged along the length of the opening 79. Each airbag 700 has an inflation port 701 and an deflation port 702. The inflation port 701 is connected to an air source via a hose. The deflation port 702 is equipped with an electric valve 703. The spray pipe 74 is located between the two airbags 700. Each airbag 700 has an elastic sheet 704. In this embodiment, the elastic sheet 704 is a rubber sheet and is arranged along the length of the airbag 700.

[0082] refer to Figure 8 and Figure 9The movable box 71 is rotatably provided with two opposing rotating rods 705, which are located below the airbag 700. The rotating rods 705 correspond one-to-one with the airbag 700. The rotating rods 705 are coaxially provided with rotating wheels 706, and the two rotating wheels 706 are connected by a belt 707. The movable frame 70 is provided with a rotating motor 708, and the motor shaft of the rotating motor 708 is coaxially connected to one of the rotating rods 705.

[0083] Each rotating rod 705 is provided with at least two rotating gears 709. The movable box 71 is rotatably provided with a driven gear 710 that meshes with the rotating gear 709. Both the rotating gear 709 and the driven gear 710 are provided with connecting rods 711. A connecting rod 712 is hinged to the connecting rod 711. A limiting rod 713 is hinged to the connecting rod 712. The axis of the limiting rod 713 is parallel to the axis of the connecting rod 711. The end of the limiting rod 713 away from the connecting rod 712 is rotatably connected to the movable box 71. The end of the connecting rod 712 away from the limiting rod 713 is used to clamp the clamping block 714 of the elastic sheet 704.

[0084] The implementation principle of Example 3 is as follows: During construction, the movable box 71 is first installed on the pier 10 or the abutment 9. The drive motor 715 drives the drive rod 716 to rotate, thereby driving the limiting plate 717 to rotate. The limiting plate 717 can be rotated to the upright state, which can limit the sealing of the sealing material and prevent the sealing material from overflowing. According to the orientation of the nozzle of the spray pipe 74, the air bag 700 is inflated. The inflation of the air bag 700 pushes the spray pipe 74 to rotate around the ball head connecting seat 75, thereby controlling the spraying direction of the spray pipe 74 and improving the convenience of spraying.

[0085] After the spray pipe 74 sprays out a sealing material, the power motor 80 drives the lead screw 81 to rotate, which moves the slider 82, thereby moving the moving pipe 73 and the spray pipe 74, so as to spray material to seal the hollow slab beam 1 to be sealed.

[0086] Because the sealing material has a certain degree of fluidity, it is easy for it to fall onto the airbag 700, causing the airbag 700 to stick to the sealing material. At this time, the rotating motor 708 drives the rotating rod 705 to rotate, which in turn drives the rotating wheel 706 and the belt 707 to rotate, thereby driving the rotating gear 709 and the driven gear 710 to rotate, which in turn drives the connecting rod 711 and the linkage rod 712 to rotate. Since the limit rod 713 pulls the linkage rod 712, the linkage rod 712 can drive the clamp 714 to release the elastic piece 704, and then open the electric valve 703 to deflate the airbag 700. Finally, the moving box 71 is removed from the pier 10 or the abutment 9. This can reduce the possibility of the sealing material falling onto the pier 10 or the abutment 9 and reduce the burden of manual cleaning.

[0087] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A process for sealing the ends of a hollow slab beam, characterized in that: Includes the following steps: Cavity cleaning: Drill holes in the hollow slab beam (1), inject water into the cavity (2) of the hollow slab beam (1), observe whether there is water leakage at the end of the hollow slab beam (1), and clean the debris in the cavity (2); Sealing: If water leakage occurs at the end of the hollow slab beam (1); If the end of the hollow slab beam (1) that leaks is located on the bridge abutment (9), extend the delivery pipe into the gap (3) between the hollow slab beam (1) and the bridge abutment (9), inject the sealing material into the sealing space (12) between the hollow slab beam (1) and the bridge abutment (9), and the sealing material will seal the sealing space (12) at the end of the hollow slab beam (1), and the construction can be completed. If the leaking hollow slab beam (1) end is located on the pier (10), the delivery pipe is extended into the gap (3) between the beam ends of the two hollow slab beams (1) in the two adjacent spans, and the sealing material is injected into the sealing space (12) between the beam ends of the two hollow slab beams (1) in the two adjacent spans. The sealing material seals the sealing space (12) at the end of the hollow slab beam (1), and the construction is completed. In the "blocking" step, a material conveying device (7) is first placed on the pier (10) or abutment (9), and the material conveying device (7) is used to connect to the conveying pipeline; The material conveying device (7) includes a movable frame (70) mounted on a pier (10) or abutment (9), a movable pipe (73) for connecting to a conveying pipeline is slidably disposed within the movable frame (70), a power assembly (8) for driving the movable pipe (73) to move is provided on the movable frame (70), and a spray pipe (74) for spraying sealing material is provided on the movable pipe (73); The moving pipe (73) is provided with a ball head connector (75) at one end near the spray pipe (74), and a connecting ball head (77) is provided at one end of the spray pipe (74) near the moving pipe (73). The connecting ball head (77) is ball-hinged with the ball head connector (75). The movable frame (70) is provided with an opening (79) for the spray pipe (74) to rotate. The opening (79) is located between the hollow slab beam (1) and the bridge abutment (9) or between two adjacent hollow slab beams (1). The movable frame (70) is provided with two airbags (700) located at the opening (79). The airbags (700) are provided with an inflation port (701) and an deflation port (702). The deflation port (702) is provided with an electric valve (703). The spray pipe (74) is located between the two airbags (700). The airbags (700) are provided with an elastic sheet (704). The movable frame (70) is rotatably provided with two opposing rotating rods (705), the rotating rods (705) are located below the airbag (700), the rotating rods (705) are coaxially provided with rotating wheels (706), the two rotating wheels (706) are connected by a belt (707), the movable frame (70) is provided with a rotating motor (708), the motor shaft of the rotating motor (708) is coaxially connected to one of the rotating rods (705); Each of the rotating rods (705) is provided with at least two rotating gears (709). The moving frame (70) is rotatably provided with a driven gear (710) that meshes with the rotating gears (709). Both the rotating gears (709) and the driven gears (710) are provided with connecting rods (711). A connecting rod (712) is hinged to the connecting rod (711). A limiting rod (713) is hinged to the connecting rod (712). The end of the limiting rod (713) away from the connecting rod (712) is rotatably connected to the moving frame (70). The end of the connecting rod (712) away from the limiting rod (713) is used to hold the clamping block (714) of the elastic sheet (704).

2. The end sealing process for a hollow slab beam according to claim 1, characterized in that: In the "sealing" step, after the delivery pipe has been sprayed with sealing material once, the delivery pipe is moved to the side where no sealing material has been sprayed, and the delivery pipe continues to deliver sealing material until the end of the hollow slab beam (1) is completely sealed.

3. The end sealing process for a hollow slab beam according to claim 1, characterized in that: In the "sealing" step, if the end of the hollow slab beam (1) loses its plug, the sealing material will seep into the cavity (2) at the end of the hollow slab beam (1); Or if there are water seepage cracks in the end cap of the hollow slab beam (1), the sealing material will seep into the water seepage cracks; If there are water seepage cracks in the end cap of the hollow slab beam (1), then the end face of the hollow slab beam (1) shall be sealed with a sealing material.

4. The end sealing process for a hollow slab beam according to claim 1, characterized in that: After the "cavity cleaning" step and before the "sealing" step, the following step is also included: leak sealing; At the hinge joint (6) of the hollow slab beam (1) to be sealed, the sealing material is sprayed between the hollow slab beam (1) and the abutment (9) or between the beam ends of two adjacent hollow slab beams (1) on the pier, and the sealing material comes into contact with the bridge deck pavement layer (5).

5. The hollow slab beam end sealing process according to claim 4, characterized in that: In the "seal-sealing" step, sealant is sprayed into the space between the hollow slab beam (1) and the abutment (9) or into the space between the ends of two adjacent hollow slab beams (1) on the pier at the hinge joint (6) on both sides of the hollow slab beam (1) to be sealed, and the sealant comes into contact with the bridge deck pavement layer (5).

6. The end sealing process for a hollow slab beam according to claim 1, characterized in that: The "sealing" step is followed by a step of cleaning; when the sealing material falls on the abutment (9) or pier (10), the excess material on the abutment (9) or pier (10) is removed.

7. The end sealing process for a hollow slab beam according to any one of claims 1-6, characterized in that: The sealing material used in the "sealing" step is a foamed material.

8. The end sealing process for a hollow slab beam according to claim 1, characterized in that: The power assembly (8) includes a power motor (80) mounted on a movable frame (70). The motor shaft of the power motor (80) is coaxially provided with a lead screw (81). A slider (82) is threaded onto the lead screw (81). The movable pipe (73) is connected to the slider (82).

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