A construction method for overlapping new and old roadbed

Abstract

The present application discloses a construction method for overlapping a new and old roadbed, which relates to the field of road widening, and comprises the following steps: step 1, excavating a casting trough at a construction position of a new road surface, so that a side of the old road surface close to the new road surface is exposed; step 2, cutting the old road surface, cutting a part of the side of the old road surface close to the new road surface, to form an overlapping trough for overlapping the new road surface; step 3, opening a plurality of reinforcing bar holes at intervals on the side wall of the overlapping trough along the length direction of the old road surface; step 4, inserting a bearing rod into the reinforcing bar hole, and the bearing rod is provided with a supporting assembly for supporting the bearing rod on the bottom surface of the overlapping trough; step 5, placing a steel mesh in the space formed by the casting trough and the overlapping trough; step 6, pouring concrete in the space formed by the casting trough and the overlapping trough to form a new road surface, and the present application uses a supporting assembly to support the bearing rod on the bottom surface of the overlapping trough, so as to enhance the bearing capacity of the bearing rod and prevent the new road surface from sinking.

Description

Technical Field

[0001] The present application relates to the field of road widening, and in particular to a construction method for overlapping a new and an old roadbed. Background Art

[0002] The widening of the road surface is almost always accompanied by the widening of the roadbed. Due to years of traffic crushing, most of the old roadbeds are already in a stable state of deformation. After the new roadbed is opened to traffic, there will be further settlement, which will cause a height difference between the new and old road surfaces and form a misalignment phenomenon.

[0003] In the related art, in order to improve the problem of the misalignment between the new and old pavements, when constructing the new pavement, a new pavement casting trough is first excavated at the construction location of the new pavement, and then a plurality of rebar holes are opened at intervals along the length direction of the old pavement on the side wall of the old pavement exposed in the casting trough, and then load-bearing steel bars are inserted into the rebar holes. After concrete is poured in the casting trough to form the new pavement, the load-bearing steel bars serve as the connecting structure of the new and old pavements, play a certain bearing role on the new pavement, and improve the problem of the new pavement's easy settlement.

[0004] With regard to the above-mentioned related technologies, since one end of the load-bearing steel bar is inserted into the old road surface, and the other end of the load-bearing steel bar extends out of the old road surface to support the subsequently poured new road surface, the roadbed of the new road surface is prone to settlement after it is opened to traffic, so that the new road surface is supported less than the old road surface. The end of the load-bearing steel bar extending out of the old roadbed is subjected to greater force, and the supporting force of the load-bearing steel bar alone is limited. During long-term use, the load-bearing steel bar is prone to bending, which can easily lead to misalignment at the connection position of the new and old road surfaces. Summary of the invention

[0005] In order to improve the weighing capacity of the load-bearing steel bars, the present application provides a construction method for overlapping the new and old roadbeds.

[0006] This application provides a construction method for overlapping a new and old roadbed, which adopts the following technical solution:

[0007] A construction method for overlapping a new and old roadbed comprises the following steps: step 1, excavating a casting trough at a construction position of a new road surface to expose a side of the old road surface close to the new road surface; step 2, cutting the old road surface, cutting a portion of the side of the old road surface close to the new road surface to form an overlapping trough for overlapping the new road surface; step 3, opening a plurality of reinforcing bar holes at intervals on the side wall of the overlapping trough along the length direction of the old road surface; step 4, inserting a bearing rod into the reinforcing bar hole, wherein the bearing rod is provided with a supporting assembly for supporting the bearing rod on the bottom surface of the overlapping trough; step 5, placing a steel mesh in the space formed by the casting trough and the overlapping trough; step 6, pouring concrete in the space formed by the casting trough and the overlapping trough to form a new road surface.

[0008] By adopting the above technical solution, the bearing rod is supported on the bottom surface of the overlapping groove by the support assembly, so that the bearing capacity of the bearing rod can be enhanced and the new road surface can be prevented from settling. In addition, due to the setting of the overlapping groove, the new and old road surfaces can be overlapped together, further enhancing the support for the new road surface and preventing the new road surface from settling.

[0009] Optionally, the supporting assembly includes a telescopic rod 1, a ramp is fixed to the bottom surface of the lap groove, the upper surface of the ramp is an inclined surface, the end of the inclined surface close to the side wall of the old roadbed is lower than the end away from the side wall of the old roadbed, one end of the telescopic rod 1 is connected to a bearing rod, and the other end of the telescopic rod 1 is fixedly connected to an inclined plate adapted to the inclined surface, and the bearing rod is provided with a driving member for driving the telescopic rod 1 to extend and retract.

[0010] By adopting the above technical solution, during the process of inserting the load-bearing rod into the rebar embedding hole, the telescopic rod is driven to extend and retract by the driving member until the inclined plate abuts against the inclined surface. By limiting the extension and retraction of the telescopic rod, the load-bearing rod can be moved horizontally, thereby preventing the load-bearing rod from escaping from the rebar embedding hole, and further improving the problem of horizontal displacement of the new road surface and the gap generated between the old road surface.

[0011] Optionally, the driving member includes a piston rod, an air filling groove is provided in the load-bearing rod, one end of the piston rod is arranged in the air filling groove, and the other end of the piston rod extends outside the load-bearing rod. The telescopic rod includes a sleeve and an extension rod, the sleeve is fixed on the load-bearing rod, one end of the extension rod is inserted into the sleeve, and the other end of the extension rod is fixedly connected to the inclined plate, the sleeve is connected to the air filling groove, the piston rod moves to make the extension rod insert into or extend out of the sleeve, the load-bearing rod is inserted into the rebar hole to push the piston rod to slide, and the sleeve is provided with a positioning component for locating the position of the extension rod.

[0012] By adopting the above technical solution, during the process of inserting the load-bearing rod into the rebar planting hole, the piston rod slides and the air pressure in the inflation groove increases, so that the gas in the inflation groove enters the sleeve, pushing the extension rod to slide, thereby extending the telescopic rod until the load-bearing rod can no longer move. At this time, when the inclined plate abuts the connecting position between the inclined surface and the bottom surface of the overlapping groove, the extension rod is positioned by the positioning assembly, so that when the telescopic rod can no longer be extended or retracted, the load-bearing rod cannot be separated from the rebar planting hole, thereby ensuring the stability of the load-bearing rod and preventing horizontal displacement of the new road surface. The drive component has a simple structure and is easy to operate.

[0013] Optionally, the positioning assembly includes a spring 1 and a block, a clearance groove for the block to be fully inserted into is provided on the side wall of the sleeve, the block is inserted into the clearance groove, the spring 1 is used to drive the block to partially extend out of the clearance groove, and a slot for the block to be inserted into is provided on the side wall of the extension rod, and when the inclined plate abuts against the inclined surface and the bottom surface of the overlapping groove at the connecting position, the block is partially stuck in the slot.

[0014] By adopting the above technical solution, when the extension rod moves, the block and the slot are aligned, so that the block is stuck in the slot under the action of spring 1, limiting the extension and retraction of telescopic rod 1; the limit assembly has a simple structure and is easy to operate.

[0015] Optionally, the support assembly also includes an inclined rod, which is a telescopic rod 2, and the inclined rod is connected to the inflation groove. The piston rod moves to drive the inclined rod to extend and retract. When the inclined plate abuts against the connecting position between the inclined surface and the bottom surface of the lap groove, the inclined rod abuts against the connecting position between the bottom surface of the lap groove and the side wall of the lap groove.

[0016] By adopting the above technical solution, when the load-bearing rod is inserted into the anchor hole, the oblique rod is extended until the oblique rod abuts against the connection position between the bottom surface of the overlapping groove and the side wall of the overlapping groove, thereby further enhancing the stability of the load-bearing rod.

[0017] Optionally, in step 3, a plurality of rebar embedding holes are opened at intervals on the side wall of the overlap groove using a tool, the tool comprising a movable plate, a drilling machine is slidably provided on the movable plate, a cylinder is provided on the movable plate for driving the drilling machine to slide, and the drilling machine slides to drill the rebar embedding holes on the side wall of the overlap groove.

[0018] By adopting the above technical solution, the drilling machine is set on the mobile vehicle plate, and the drilling machine is driven to slide by cylinder 1, so that the reinforcing bar holes can be drilled on the side wall of the overlapping groove, which is simple and convenient.

[0019] Optionally, two brackets are mounted on the movable vehicle plate, a conveyor belt is installed between the two brackets, a plurality of mounting blocks are fixedly connected to the outer wall of the conveyor belt along its own path at intervals, a plug plate for plugging into the mounting block is fixedly connected to the load-bearing rod, and a cylinder 2 is provided on the movable vehicle plate for pushing the load-bearing rod out of the mounting block and inserting it into the rebar hole.

[0020] By adopting the above technical scheme, during construction, multiple bearing rods are inserted into the installation block. After the drilling machine drills the reinforcement holes, the bearing rods are moved to the position of cylinder two through the movement of the conveyor belt, and then the bearing rods are pushed to slide by cylinder two to insert the bearing rods into the reinforcement holes; thereby facilitating the automatic construction of the bearing rods.

[0021] Optionally, a slide is slidably connected to the bracket in a vertical direction, a conveyor belt is installed between the two slides, and a driving component for driving the slide to slide is provided on the bracket.

[0022] By adopting the above technical solution, it is convenient to adjust the height of the conveyor belt to prevent the load-bearing rod from being unable to align with the anchor bolt hole due to uneven ground, thereby preventing the load-bearing rod from being unable to be inserted into the anchor bolt hole.

[0023] In summary, this application includes the following beneficial technical effects:

[0024] 1. The present application uses a support assembly to support the bearing rod on the bottom surface of the overlap groove, thereby enhancing the bearing capacity of the bearing rod and preventing the new road surface from settling. In addition, due to the setting of the overlap groove, the new and old road surfaces can be overlapped together, further enhancing the support for the new road surface and preventing the new road surface from settling;

[0025] 2. The present application uses a limit assembly to limit the extension and retraction of the telescopic rod and cooperates with the inclined surface and the inclined plate to prevent the load-bearing rod from being separated from the rebar hole, thereby preventing the new road surface from causing horizontal displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of a construction method for overlapping a new and old roadbed in an embodiment of the present application;

[0027] Figure 2 yes Figure 1 A magnified schematic diagram of the middle A area;

[0028] Figure 3 yes Figure 1 Schematic diagram of the overall structure of the moving car plate;

[0029] Figure 4 It is a schematic diagram of the overall structure of a load-bearing rod in a construction method for overlapping a new and old roadbed in an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 1. Casting trough; 2. Old pavement; 3. Overlap groove; 4. Inclined platform; 5. Inclined surface; 6. Rebar hole; 7. Moving car plate; 8. Drilling machine; 9. Frame; 10. Cylinder 1; 11. Electromagnet; 12. Load-bearing rod; 13. Telescopic rod 1; 14. Casing; 15. Extension rod; 16. Inclined plate; 17. Piston rod; 18. Inflatable groove; 19. Spring 2; 20. Airway; 21. Spring 1; 22. Block; 23. Give way groove; 24. Bayonet; 25. Inclined rod; 26. Crossbar; 27. Bracket; 28. Screw 1; 29. ​​Motor 1; 30. Slide; 31. Screw 2; 32. Motor 2; 33. Belt; 34. Pulley; 35. Motor 3; 36. Mounting block; 37. Insert plate; 38. Cylinder 2. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The present application embodiment discloses a construction method for overlapping a new and old roadbed. Figure 1 and Figure 2 , the construction method comprises the following steps:

[0034] Step 1: excavate a casting trough 1 at the new pavement construction location to expose the side of the old pavement 2 close to the new pavement, and level the bottom surface of the casting trough 1;

[0035] Step 2: Use a cutting machine or a slotting machine to cut the old road surface 2, and cut the part of the old road surface 2 close to the new road surface to form an overlapping groove 3 for the new road surface to overlap;

[0036] In this embodiment, a slope 4 is integrally formed on the bottom surface of the overlapping groove 3 away from the side wall of the overlapping groove 3, and the upper surface of the slope 4 is a slope 5, and the end of the slope 5 close to the side wall of the old roadbed is lower than the end away from the side wall of the old roadbed.

[0037] Step 3: Reference Figure 3 , a plurality of reinforcing bar holes 6 are opened at intervals on the side wall of the overlapping groove 3 along the length direction of the old road surface 2 by using a tool; the tool comprises a movable vehicle plate 7, a drilling machine 8 is slidably provided on the movable vehicle plate 7, a sleeve frame 9 is fixedly connected to the movable vehicle plate 7, the drilling machine 8 is slidably penetrated through the sleeve frame 9, the drilling machine 8 slides to drill the reinforcing bar holes 6 on the side wall of the overlapping groove 3, a cylinder 10 is fixedly connected to the movable vehicle plate 7, the length direction of the cylinder 10 is arranged along the sliding direction of the drilling machine 8, an electromagnet 11 is fixedly connected to the telescopic end of the cylinder 10, and the electromagnet 11 is used for magnetically attracting the drilling machine 8. The movable vehicle plate 7 is provided with a cylinder 10 that drives the drilling machine 8 to slide;

[0038] When in use, place the movable vehicle plate 7 in the casting trough 1, and make the drilling machine 8 face the side wall of the overlapping groove 3, then move the vehicle plate 7 to a suitable position, and then start the cylinder 10 to drive the drilling machine 8 to move, and open the rebar embedding hole 6 on the side wall of the overlapping groove 3.

[0039] Step 4: Reference Figure 2 and Figure 4 , insert the bearing rod 12 into the anchor hole 6, and the bearing rod 12 is provided with a supporting assembly for supporting the bearing rod 12 on the bottom surface of the overlap groove 3;

[0040] The supporting assembly includes a telescopic rod 13, which includes a sleeve 14 and an extension rod 15. The sleeve 14 is fixed on the load-bearing rod 12, one end of the extension rod 15 is inserted into the sleeve 14, and the other end of the extension rod 15 is fixedly connected to an inclined plate 16 adapted to the inclined surface 5; the load-bearing rod 12 is provided with a driving member for driving the telescopic rod 13 to extend and retract.

[0041] The driving member includes a piston rod 17, and an air filling groove 18 is provided in the load-bearing rod 12. One end of the piston rod 17 is arranged in the air filling groove 18, and the other end of the piston rod 17 extends to the outside of the load-bearing rod 12. A spring 2 19 is fixedly connected in the air filling groove 18 along the sliding direction of the piston rod 17. The spring 2 19 is fixedly connected to the piston rod 17. The spring 2 19 is used to drive the piston rod 17 to extend out of the load-bearing rod 12. An air channel 20 is provided in the load-bearing rod 12, and the sleeve 14 is connected to the air filling groove 18 through the air channel 20. The piston rod 17 moves to allow the extension rod 15 to be inserted into or extended out of the sleeve 14. The load-bearing rod 12 is inserted into the rebar hole 6 to push the piston rod 17 to slide. A positioning component for positioning the position of the extension rod 15 is provided on the sleeve 14.

[0042] The positioning assembly includes a spring 21 and a block 22. A clearance groove 23 for the block 22 to be fully inserted is provided on the side wall of the sleeve 14. The block 22 is inserted into the clearance groove 23. The spring 21 is fixedly connected to the clearance groove 23 along the insertion direction of the block 22. Both ends of the spring 21 in the length direction are respectively fixedly connected to the side wall of the clearance groove 23 and the block 22. When the spring 21 is not deformed, the block 22 is partially located in the clearance groove 23. A bayonet 24 for the block 22 to be inserted is provided on the side wall of the extension rod 15. When the inclined plate 16 abuts against the connecting position of the inclined surface 5 and the bottom surface of the overlapping groove 3, the block 22 is partially stuck in the bayonet 24.

[0043] The support assembly also includes an inclined rod 25, which is a telescopic rod 2. The inclined rod 25 is connected to the inflation groove 18 through the air channel 20. The piston rod 17 moves to drive the inclined rod 25 to extend and retract. When the inclined plate 16 abuts against the connecting position between the inclined surface 5 and the bottom surface of the overlapping groove 3, the inclined rod 25 abuts against the connecting position between the bottom surface of the overlapping groove 3 and the side wall of the overlapping groove 3 (the telescopic principle of the inclined rod 25 is consistent with the telescopic principle of the telescopic rod 13, which will not be repeated in this application).

[0044] Reference Figure 1 and Figure 3 The movable vehicle plate 7 is rectangular, and two ends of the movable vehicle plate 7 in the length direction are fixedly connected with two cross bars 26. The length direction of the cross bar 26 is arranged along the width direction of the movable vehicle plate 7. A bracket 27 is slidably connected to the cross bar 26 along its own length direction. A slot for inserting the bracket 27 is opened on the cross bar 26, and a screw rod 28 is rotatably connected in the slot. The rotation axis and length direction of the screw rod 28 are both arranged along the length direction of the cross bar 26. The screw rod 28 threads through the bracket 27. A motor 29 is fixedly connected to the cross bar 26, and the output shaft of the motor 29 is coaxially fixedly connected to the screw rod 28.

[0045] A slide 30 is slidably connected to the bracket 27 in the vertical direction. A driving assembly for driving the slide 30 to slide is provided on the bracket 27. The driving assembly includes a motor 32 and a screw 31. A slide groove for the slide 30 to slide is opened on the bracket 27. The screw 31 is rotatably connected in the slide groove. The rotation axis and length direction of the screw 31 are both arranged along the length direction of the bracket 27. The screw 31 threads through the slide 30. The motor 32 is fixedly connected to the bracket 27. The output shaft of the motor 32 is coaxially fixedly connected to the screw 31.

[0046] A conveyor belt is installed between the two slides 30, and the conveyor belt includes a belt 33 and two pulleys 34. The pulley 34 is rotatably connected to the slide 30, and the belt 33 is simultaneously wound around the two pulleys 34. A motor 35 is fixedly connected to one of the slides 30, and the output shaft of the motor 35 is coaxially fixedly connected to the pulley 34.

[0047] A plurality of mounting blocks 36 are fixedly connected at intervals on the outer wall of the belt 33 along its own path, a plug plate 37 for being inserted into the mounting block 36 is fixedly connected to the load-bearing rod 12, and an interference fit between the plug plate 37 and the mounting block 36 is used to prevent the plug plate 37 from abnormally detaching from the mounting block 36, and a cylinder 2 38 is fixedly connected to the moving vehicle plate 7, and the cylinder 2 38 is used to push the load-bearing rod 12 to detach from the mounting block 36 and insert it into the rebar hole 6.

[0048] Step 5, cleaning the casting trough 1 and the lap trough 3;

[0049] Step 6: Place a steel mesh in the space formed by the casting trough 1 and the lap trough 3;

[0050] Step 7: pour concrete in the space formed by the pouring trough 1 and the overlapping trough 3 to form a new road surface.

[0051] The implementation principle of the overlapping construction method of the new and old roadbed of the embodiment of the present application is as follows: after the overlapping groove 3 is opened, the mobile car plate 7 is opened into the casting groove 1, the bearing rod 12 is installed on the mounting block 36, and the position of the conveyor belt is adjusted by the screw rod 1 28 and the screw rod 2 31, and then the mobile car plate 7 is moved, and the cylinder 10 and the drilling machine 8 are used to drill the reinforcing bar hole 6 on the side wall of the overlapping groove 3, and then the motor 35 is turned on to drive the belt 33 to rotate, so that one of the bearing rods 12 is moved to the position of the cylinder 2 38, and then the bearing rod 12 is inserted into the cylinder 2 38. In the reinforcement hole 6, during the process of inserting the load-bearing rod 12 into the reinforcement hole 6, the piston rod 17 is abutted by the bottom wall of the reinforcement hole 6, and the piston rod 17 is pressed into the inflation groove 18. The gas in the inflation groove 18 enters the telescopic rod 1 13 and the telescopic rod 2, so that the telescopic rod 1 13 and the telescopic rod 2 are extended until the telescopic rod 2 abuts against the connection position between the bottom surface of the lap groove 3 and the side wall of the lap groove 3, and the clamping plate abuts against the connection position between the bottom surface of the lap groove 3 and the inclined surface 5. At this time, the block 22 is stuck in the bayonet 24, limiting the reset of the telescopic rod 13, so that the load-bearing rod 12 remains stable.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A construction method for overlapping a new and old roadbed, characterized in that: The invention comprises the following steps: step 1, excavating a casting groove (1) at the construction position of the new pavement so that the side of the old pavement (2) close to the new pavement is exposed; step 2, cutting the old pavement (2), cutting a part of the side of the old pavement (2) close to the new pavement to form an overlapping groove (3) for overlapping the new pavement; step 3, opening a plurality of reinforcing bar holes (6) at intervals on the side wall of the overlapping groove (3) along the length direction of the old pavement (2); step 4, inserting a bearing rod (12) into the reinforcing bar hole (6), wherein the bearing rod (12) is provided with a support for supporting the bearing rod (12) on the overlapping groove; A support assembly at the bottom of the joint groove (3); step 5, placing a steel mesh in the space formed by the casting groove (1) and the overlapping groove (3); step 6, pouring concrete in the space formed by the casting groove (1) and the overlapping groove (3) to form a new road surface; the support assembly includes a telescopic rod (13), a ramp (4) is fixed to the bottom of the overlapping groove (3), the upper surface of the ramp (4) is a slope (5), the end of the slope (5) close to the side wall of the old roadbed is lower than the end away from the side wall of the old roadbed, one end of the telescopic rod (13) is connected to the bearing rod (12), The other end of the telescopic rod (13) is fixedly connected to an inclined plate (16) adapted to the inclined surface (5); the bearing rod (12) is provided with a driving member for driving the telescopic rod (13) to extend and retract; the driving member comprises a piston rod (17); an air filling groove (18) is provided in the bearing rod (12); one end of the piston rod (17) is arranged in the air filling groove (18); the other end of the piston rod (17) extends outside the bearing rod (12); the telescopic rod (13) comprises a sleeve (14) and an extension rod (15); the sleeve (14) is provided with a gas filling groove (18); 4) is fixed on the bearing rod (12), one end of the extension rod (15) is inserted into the sleeve (14), the other end of the extension rod (15) is fixedly connected to the inclined plate (16), the sleeve (14) is connected to the inflation groove (18), the piston rod (17) moves to allow the extension rod (15) to be inserted into or extended out of the sleeve (14), the bearing rod (12) is inserted into the rebar hole (6) to push the piston rod (17) to slide, and a positioning component for positioning the position of the extension rod (15) is provided on the sleeve (14).

2. A construction method for overlapping a new and old roadbed according to claim 1, characterized in that: The positioning assembly comprises a spring 1 (21) and a clamping block (22); a clearance groove (23) for the clamping block (22) to be fully inserted is provided on the side wall of the sleeve (14); the clamping block (22) is inserted into the clearance groove (23); the spring 1 (21) is used to drive the clamping block (22) to partially extend out of the clearance groove (23); a clamping slot (24) for the clamping block (22) to be clamped into is provided on the side wall of the extension rod (15); when the inclined plate (16) abuts against the connecting position of the inclined surface (5) and the bottom surface of the overlapping groove (3), the clamping block (22) is partially clamped in the clamping slot (24).

3. A construction method for overlapping a new and old roadbed according to claim 1, characterized in that: The support assembly further comprises an inclined rod (25), the inclined rod (25) being a telescopic rod 2, the inclined rod (25) being connected to the inflation groove (18), the piston rod (17) moving to drive the inclined rod (25) to extend and retract, and when the inclined plate (16) abuts against the connecting position of the inclined surface (5) and the bottom surface of the lap groove (3), the inclined rod (25) abuts against the connecting position of the bottom surface of the lap groove (3) and the side wall of the lap groove (3).

4. A construction method for overlapping a new and old roadbed according to claim 1, characterized in that: In step 3, a plurality of reinforcing bar holes (6) are opened at intervals on the side wall of the overlapping groove (3) by using a tool, the tool comprising a movable vehicle plate (7), a drilling machine (8) is slidably provided on the movable vehicle plate (7), a cylinder (10) is provided on the movable vehicle plate (7) for driving the drilling machine (8) to slide, and the drilling machine (8) slides to drill the reinforcing bar holes (6) on the side wall of the overlapping groove (3).

5. A construction method for overlapping a new and old roadbed according to claim 4, characterized in that: Two brackets (27) are mounted on the movable vehicle plate (7), a conveyor belt is installed between the two brackets (27), a plurality of mounting blocks (36) are fixedly connected to the outer wall of the conveyor belt (33) along its own path at intervals, a plug plate (37) for plugging into the mounting block (36) is fixedly connected to the bearing rod (12), and a cylinder (38) for pushing the bearing rod (12) to detach from the mounting block (36) and insert into the reinforcing bar hole (6) is provided on the movable vehicle plate (7).

6. A construction method for overlapping a new and old roadbed according to claim 5, characterized in that: A slide seat (30) is slidably connected to the bracket (27) in a vertical direction, a conveyor belt is installed between the two slide seats (30), and a driving component for driving the slide seat (30) to slide is provided on the bracket (27).

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