A construction method for the joint between a new and an old cast-in-place concrete pavement

Abstract

This application relates to the field of road construction, and particularly to a construction method for the junction of new and old cast concrete pavements. The specific steps are as follows: compact the roadbeds on both sides of the old pavement and lay the roadbed cushion; use construction equipment to clean the surface of the two transverse sides of the old pavement; use construction equipment to open several rows of holes along the height direction of the old pavement on the transverse sides of the old pavement, and several holes are evenly distributed along the road transverse direction in each row; put tie bars into one row of holes corresponding to the transverse sides of the old pavement, and inject anchor glue into the holes where the tie bars are placed; after the curing strength of the anchor glue reaches the standard, carry out steel bar binding on the tie bars; build a formwork, and pour and cure the concrete of the new pavement until the strength reaches the standard, so as to form holes on the transverse sides of the old pavement, so that when the concrete of the new pavement is poured, the concrete enters the holes to form connection points, which can effectively improve the connection strength and connection stability between the new and old pavements.

Description

Technical Field

[0001] This application relates to the field of road construction, and particularly to a construction method for the junction of new and old cast concrete pavements. Background Art

[0002] In road construction, situations of new and old concrete connection are prone to occur. For example, when widening construction is required on both lateral sides of the road, that is, increasing the road width without demolishing the original road and rebuilding a new road, the engineering quantity is low and the cost is not likely to be large. In order to effectively connect the new and old concrete pavements and reduce the possibility of height difference between the new and old pavements, it is necessary to implant steel bars at the lower part of the junction of the new and old pavements.

[0003] There is a construction method for preventing uneven settlement of new and old pavements with the publication number of CN109778629A. On both lateral sides of the road, that is, the subgrades on both sides in the length direction of the road are first processed, and sleeper beams are set in the subgrade directly below the junction of the new and old concrete pavements. Then, diameters are made on the horizontal vertical sides of the old concrete pavement, and new concrete pavements are poured on both lateral sides of the old concrete pavement.

[0004] In view of the above related technologies, the stress transfer and sharing between the new and old pavements mainly rely on steel bars. Once the steel bars cannot effectively transfer stress due to corrosion, height differences or enlarged spacing are likely to occur at the junction of the new and old pavements, making it difficult to maintain a stable connection between the new and old pavements. Summary of the Invention

[0005] In order to improve the stability of the junction of new and old pavements, this application provides a construction method for the junction of new and old cast concrete pavements.

[0006] A construction method for the junction of new and old cast concrete pavements provided by this application adopts the following technical solutions.

[0007] A construction method for the junction of new and old cast concrete pavements specifically includes the following steps.

[0008] Step 1: Compact the subgrades on both sides of the old pavement and lay subgrade cushions.

[0009] Step 2: Use construction equipment to clean the surfaces of the two horizontal sides of the old pavement.

[0010] Step 3: Use construction equipment to open several rows of holes along the height direction of the old pavement on the horizontal sides of the old pavement, and several holes in each row are evenly distributed along the road width.

[0011] Step 4: Place tie bars into one row of holes corresponding to the horizontal sides of the old pavement, and inject anchor glue into the holes where the tie bars are placed.

[0012] Step 5: After the curing strength of the planted bar adhesive reaches the standard, carry out steel bar binding on the tie bars.

[0013] Step 6: Build the formwork, pour the new road surface concrete, and cure it until the strength reaches the standard.

[0014] By adopting the above technical solution, several rows of holes are formed on the transverse side of the old road surface, so that when pouring the concrete of the new road surface, the concrete slurry can enter the several rows of holes on the transverse side of the old road surface, which can effectively improve the connection strength and connection stability between the new and old road surfaces, make it more difficult for height differences and gaps to appear between the new and old road surfaces, improve the quality of the road widening construction. In addition, cleaning the transverse side of the old road surface first can also better improve the connection strength between the new and old road surfaces.

[0015] Optionally, the construction equipment includes a vehicle body that can move along the transverse direction of the old road surface, a width-adjusting block arranged on the vehicle body, a rotating frame arranged on the width-adjusting block, a moving-out frame arranged on the rotating frame, several drilling machine bodies arranged on the side of the moving-out frame away from the vehicle body and capable of drilling the transverse side of the old road surface, a moving-out frame moving device arranged on the rotating frame and driving the moving-out frame to move longitudinally along the old road surface, a cleaning frame fixed to the rotating frame at the front end of the moving direction of the vehicle body, and a cleaning part arranged on the cleaning frame and used for cleaning the transverse side of the old road surface.

[0016] By adopting the above technical solution, when the vehicle body moves forward transversely along the old road surface, the cleaning part cleans the transverse side of the old road surface relative to it. Then the vehicle body stops, and the moving-out frame moves to bring the drilling machine body close to the transverse side of the old road surface for drilling. After the drilling is completed, the vehicle body continues to move forward, so that the cleaning and drilling work on the transverse side of the old road surface can be synchronously operated with high efficiency, reducing the manual labor intensity.

[0017] Optionally, the moving-out frame moving device includes a moving-out frame oil cylinder with the power rod fixedly connected to the moving-out frame and fixedly connected to the rotating frame, a rotating frame slide rail fixedly connected to the rotating frame, and a moving-out frame slider fixedly connected to the moving-out frame and slidably connected to the rotating frame slide rail.

[0018] By adopting the above technical solution, the moving-out frame oil cylinder can provide sufficient pressure to enable the drilling machine body to carry out drilling operations on the old concrete road surface, and the rotating frame slide rail and the moving-out frame slider can also effectively improve the stability of the moving-out frame movement, making it difficult for the moving-out frame to have movement deviation during the drilling process and improving the drilling quality.

[0019] Optionally, the removal rack includes a main frame body, several buffer sliders longitudinally slidably connected to the main frame body along the old road surface. Each buffer slider is detachably connected to a drill body. The main frame body is fixedly connected with a frame body block corresponding to each buffer slider. A buffer spring is fixedly connected between the frame body block and the buffer slider. The buffer spring forces the buffer slider away from the old road surface. The frame body block is threadedly connected with a displacement limiting rod that can abut against the buffer slider.

[0020] By adopting the above technical solution, the pressure between the drill bit of the drill body and the lateral side of the old road surface increases slowly, which is not easy to damage the drill bit of the drill body, prolongs the service life of the drill bit of the drill body, and the setting of the displacement limiting rod enables the drill body to obtain sufficient pressure for concrete drilling. And the threaded connection of the displacement limiting rod can be moved to adjust the buffer distance of the drill body according to actual needs, such as the hardness of the concrete layer of different old road surfaces, so as to effectively extend the service life of the drill bit of the drill body while also accelerating the drilling progress, that is, it is not necessary for the main frame body to move a longer distance, which helps to improve the construction efficiency.

[0021] Optionally, a synchronous slider is longitudinally slidably connected to the main frame body along the old road surface. The displacement limiting rod is rotatably connected to the synchronous slider. One end of the displacement limiting rod located in the synchronous slider is coaxially fixedly connected with a rod groove wheel. A middle groove wheel is rotatably connected between two adjacent rod groove wheels. Two circumferential groove wheels are rotatably connected in the synchronous slider. A transmission belt is connected between the circumferential groove wheel, the middle groove wheel and the rod groove wheel. The synchronous slider is rotatably connected with a turntable coaxially fixedly connected to the middle groove wheel or the rod groove wheel.

[0022] By adopting the above technical solution, rotating the turntable makes the displacement limiting rods on the same side of the vehicle body rotate synchronously, so that the buffer sliders corresponding to the drill bodies on the same side of the vehicle body can move the same distance, which is convenient for adjustment and makes the buffer distances of different drill bodies not easily have a large gap, so as to uniformly maintain all drill bodies.

[0023] Optionally, the rotating frame is rotatably connected to the width-adjusting block. The width-adjusting block is fixedly connected with a rotary oil cylinder for driving the rotating frame to rotate. The width-adjusting block is longitudinally slidably connected to the vehicle body along the old road surface. Width-adjusting blocks are arranged on both sides of the vehicle body. The vehicle body is rotatably connected with a bidirectional lead screw threadedly connected to the width-adjusting block and driving the two width-adjusting blocks to approach or move away from each other. The vehicle body is provided with a bidirectional lead screw motor for driving the bidirectional lead screw to rotate.

[0024] By adopting the above technical solution, when it is not necessary to drill the lateral side of the old road surface, the rotating frame rotates to be inclined towards the vertical direction, so that the main body of the drilling machine is not likely to contact the ground, reducing the possibility of damage to the main body of the drilling machine and the moving-out frame, and the distance between the two width-adjusting blocks can be adjusted, so that the drilling operation on the two lateral sides of the old road surface with different widths within a certain range can be better carried out.

[0025] Optionally, a nozzle is fixedly connected to the moving-out frame corresponding to each main body of the drilling machine. The nozzle is used to spray cooling water towards the drilling position on the lateral side of the old road surface. A nozzle is fixedly connected to the moving-out frame corresponding to each main body of the drilling machine. The nozzle is used to send hot air into the hole on the lateral side of the old road surface.

[0026] By adopting the above technical solution, the nozzle can wet the position to be drilled before the drilling machine drills, so as to ensure the smooth progress of the drilling operation. And after the drilling is completed, the nozzle can clean the impurities inside the hole and also dry the hole with water inside, so that when the planting bar glue is put into the hole subsequently, the connection strength of the planting bar glue is not easily affected by the remaining water.

[0027] Optionally, the cleaning part includes a cleaning air pipe fixedly connected to the cleaning frame and spraying gas towards the old road surface, a cleaning shovel fixedly connected to the cleaning frame and close to the lateral side of the old road surface cleaned by the gas sprayed from the cleaning air pipe, and a milling and planing main body fixedly connected to the cleaning frame and milling the lateral side of the old road surface cleaned by the cleaning shovel.

[0028] By adopting the above technical solution, first, the cleaning air pipe sprays high-pressure gas on the lateral side of the old road surface for preliminary cleaning, then the cleaning shovel removes the protrusions such as stones attached to the lateral side of the old road surface, and then the milling and planing main body mills the lateral side of the old road surface to improve the connection strength between the new and old road surfaces in the follow-up.

[0029] Optionally, the cleaning shovel includes a fixed block fixedly connected to the cleaning frame, a moving inclined block slidably connected to the fixed block along the forward movement direction of the vehicle body and cleaning the lateral side of the old road surface. The fixed block is provided with a pressure sensor that can stop the vehicle body according to the received pressure value. A compression spring is fixedly connected between the pressure sensor and the moving inclined block, and the compression spring forces the pressure sensor and the moving inclined block to move away from each other.

[0030] By adopting the above technical solution, when the moving inclined plane block contacts sundries and stones with a relatively high adhesion strength on the lateral side of the old road surface, the compressed spring will be compressed, causing the pressure of the moving inclined plane block to gradually increase, so as to remove the sundries and stones. And when the moving inclined plane block moves a large distance and the compressed spring is compressed greatly, the sundries and stones still cannot be removed at this time, and the pressure value applied by the compressed spring to the pressure sensor exceeds the preset pressure value in the external controller. Then, the external controller can trigger the alarm to alarm, so as to stop the movement of the vehicle body in time, and manually impact and break the sundries and stones that are difficult to be shoveled off on the lateral side of the old road surface, reducing the possibility of serious damage to the cleaning shovel.

[0031] Optionally, the inner diameter of the holes formed by the drilling machine main body closer to the front end of the moving direction of the vehicle body is smaller and deeper.

[0032] By adopting the above technical solution, each time the vehicle body moves forward by the distance between two adjacent holes, and then the drilling operation is carried out, so that the holes are finally formed into special-shaped holes with the largest diameter at the opening and a stepped inner wall. This also helps the concrete slurry to better flow into the holes with a large opening during the concrete pouring of the new road surface, so that the internal space of the holes is more fully filled with the concrete slurry, and the connection strength between the new and old road surfaces can be better improved.

[0033] In summary, the present application includes at least one of the following beneficial effects:

[0034] 1. Form several rows of holes on the lateral side of the old road surface, so that during the concrete pouring of the new road surface, the concrete slurry can enter the several rows of holes on the lateral side of the old road surface, effectively improving the connection strength and connection stability between the new and old road surfaces, making it more difficult for height differences and gaps to appear between the new and old road surfaces, and improving the quality of road widening construction;

[0035] 2. When the vehicle body moves forward horizontally along the old road surface, the cleaning part cleans the lateral side of the old road surface, and then the vehicle body stops, so that the moving-out frame moves to bring the drilling machine main body close to the lateral side of the old road surface for drilling. After the drilling is completed, the vehicle body continues to move forward, enabling the cleaning and drilling operations on the lateral side of the old road surface to be synchronously operated with high efficiency, reducing the manual labor intensity; BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of the construction equipment of the present application;

[0037] Figure 2 is a schematic diagram of the relevant structures of the rotating frame and the moving-out frame on one side of the vehicle body;

[0038] Figure 3 is Figure 2 the enlarged view at A in

[0039] Figure 4 is Figure 2 Another perspective view, and a structural schematic diagram showing the inside of the homology shift block;

[0040] Figure 5 It is a side view of the hole finally formed on the transverse side of the old road surface.

[0041] Explanation of reference numerals: 1, vehicle body; 2, bogie; 21, pressure sensor; 22, compression spring; 3, drilling machine main body; 31, cleaning frame; 32, cleaning part; 33, nozzle; 34, air nozzle; 35, cleaning air pipe; 36, cleaning shovel; 37, milling and planing main body; 38, fixed block; 39, moving inclined plane block; 4, width-adjusting block; 41, bidirectional lead screw; 42, bidirectional lead screw motor; 43, limit shift rod; 44, homology slider; 45, rod groove wheel; 46, middle groove wheel; 47, peripheral groove wheel; 48, transmission belt; 49, turntable; 5, removal frame; 51, removal frame moving device; 52, removal frame oil cylinder; 53, bogie slide rail; 54, removal frame slider; 55, main frame body; 56, buffer slider; 57, frame body block; 58, buffer spring; 59, slewing oil cylinder. Detailed implementation manners

[0042] The following further elaborates on the present application in conjunction with the accompanying drawings.

[0043] The embodiment of the present application discloses a construction method for the junction of new and old cast-in-place concrete road surfaces, which specifically includes the following steps.

[0044] Step 1: Compact the roadbeds on both sides of the old road surface and lay the roadbed cushion layer;

[0045] Step 2: Use construction equipment to clean the surfaces of the two transverse sides of the old road surface;

[0046] Step 3: Use construction equipment to open several rows of holes along the height direction of the old road surface on the transverse sides of the old road surface, and several holes in each row are evenly distributed along the road transverse direction;

[0047] Step 4: Place tie bars into a row of holes corresponding to the transverse sides of the old road surface, and inject planting glue into the holes where the tie bars are placed;

[0048] Step 5: After the curing strength of the planting glue reaches the standard, carry out steel bar binding on the tie bars;

[0049] Step 6: Build a formwork, and pour and cure the concrete of the new road surface until the strength reaches the standard.

[0050] Refer to Figure 1, wherein the construction equipment includes a vehicle body 1 that can move forward horizontally along the old road surface. The length direction of the vehicle body 1 is consistent with the transverse direction of the old road surface. On both sides of the vehicle body 1 in the length direction, width - adapting blocks 4 are slidably connected along the width direction of the vehicle body 1. On the far - away sides of the two width - adapting blocks 4, rotary frames 2 are rotatably connected. The rotation axis direction of the rotary frames 2 is consistent with the length direction of the vehicle body 1. The two rotary frames 2 can be rotated to be horizontal or vertical. The two rotary frames 2 are both slidably connected with moving - out frames 5. The moving - out frames 5 can move along the width direction of the vehicle body 1 when the rotary frames 2 are horizontal. Each moving - out frame 5 is equipped with a group of several rows of drilling machine main bodies 3, and the drilling machine main bodies 3 can be concrete drills. When the rotary frames 2 are horizontal, the same - group several rows of drilling machine main bodies 3 are arranged at equal intervals in the vertical direction, and several drilling machine main bodies 3 are evenly distributed along the length direction of the vehicle body 1. The drilling machine main bodies 3 drill holes in the transverse side surface of the old road surface.

[0051] Refer to Figure 1 and Figure 2 , both of the two rotary frames 2 are fixedly connected with cleaning frames 31. Both of the two cleaning frames 31 are provided with cleaning parts 32 for cleaning the transverse side surface of the old road surface. The cleaning parts 32 are located in front of the drilling machine main bodies 3 along the moving direction of the vehicle body 1 to clean the transverse side surface of the old road surface before drilling. The cleaning part 32 includes a cleaning air pipe 35 fixedly connected to the cleaning frame 31. The cleaning air pipe 35 is connected to a high - pressure air pump located in the vehicle body 1 to send high - pressure air towards the transverse side surface of the old road surface to conduct preliminary cleaning on the transverse side surface of the old road surface. The cleaning frame 31 is also provided with a cleaning shovel 36 and a milling main body 37. The milling main body 37 can be a small milling machine. The cleaning shovel 36 is close to the transverse side surface of the old road surface to shovel off the stones and sundries attached to the old road surface. The milling main body 37 conducts final milling treatment on the transverse side surface of the old road surface that has been processed by the cleaning air pipe 35 and the cleaning shovel 36 to obtain better cleaning of the surface of the transverse side surface of the old road surface.

[0052] Refer to Figure 2 and Figure 3 , the cleaning shovel 36 includes a fixed block 38 fixedly connected to the cleaning frame 31. A moving inclined - plane block 39 is slidably connected to the vertical side surface of the fixed block 38 facing the vehicle body 1. The moving inclined - plane block 39 moves along the length direction of the vehicle body 1. The horizontal width of the moving inclined - plane block 39 is smaller at the more forward position along the forward - moving direction of the vehicle body 1, so that the moving inclined - plane block 39 can effectively shovel off the sundries and stones. A pressure sensor 21 is fixedly connected to the vertical side surface of the fixed block 38. The pressure sensor 21 is directly opposite to the rear end of the moving inclined - plane block 39 along the moving direction of the vehicle body 1. A compression spring 22 is fixedly connected between the pressure sensor 21 and the moving inclined - plane block 39. The compression spring 22 forces the moving inclined - plane block 39 away from the pressure sensor 21. The pressure sensor 21 is electrically connected to the controller in the vehicle body 1 first.

[0053] When the moving inclined surface block 39 contacts sundry stones with relatively high adhesion strength on the lateral side of the old road surface, the compressed spring 22 will be compressed, causing the pressure on the moving inclined surface block 39 to gradually increase so as to remove the sundry stones. And when the moving inclined surface block 39 moves a large distance and the compressed spring 22 is compressed greatly, at this time the sundry stones still cannot be removed, and the pressure value exerted by the compressed spring 22 on the pressure sensor 21 exceeds the preset pressure value in the external controller, thus enabling the external controller to trigger the alarm to stop the movement of the vehicle body 1 in time.

[0054] Refer to Figure 1 , the vehicle body 1 is rotatably connected with a bidirectional lead screw 41 threadedly connected to two width - adapting blocks 4. The length direction of the bidirectional lead screw 41 is consistent with the width direction of the vehicle body 1. The thread directions on both sides of the center point of the bidirectional lead screw 41 are opposite. The two width - adapting blocks 4 are respectively located at equal distances on both sides of the center point of the bidirectional lead screw 41. The vehicle body 1 is fixedly connected with a bidirectional lead screw motor 42. The bidirectional lead screw motor 42 transmits power to the bidirectional lead screw 41 through a gearbox, enabling the bidirectional lead screw 41 to rotate to drive the two width - adapting blocks 4 to approach or move away from each other, so as to adjust for old road surfaces of different widths. The width - adapting block 4 is fixedly connected with a rotary oil cylinder 59. The rotating shaft of the rotary oil cylinder 59 drives the rotating frame 2 to rotate through a gearbox, so that when the vehicle body 1 moves onto the old road surface, the rotating frame 2 can rotate from the vertical to the horizontal, enabling the drilling machine main body 3 to approach the lateral side of the old road surface. Subsequently, the state where the rotating frame 2 is horizontal will be described hereinafter.

[0055] Refer to Figure 2 , the moving - out frame 5 includes a main frame body 55 located below the rotating frame 2 when the rotating frame 2 is horizontal. The rotating frame 2 is provided with a moving - out frame moving device 51 for driving the moving - out frame 5 to move longitudinally along the old road surface. The moving - out frame moving device 51 includes a rotating - frame slide rail 53 fixedly connected to the lower surface of the rotating frame 2. The length direction of the rotating - frame slide rail 53 is consistent with the width direction of the vehicle body 1. The main frame body 55 is fixedly connected with a moving - out frame slider 54. The moving - out frame slider 54 is slidably connected to the rotating - frame slide rail 53 along the length direction of the rotating - frame slide rail 53. The rotating frame 2 is fixedly connected with a moving - out frame oil cylinder 52. The power rod of the moving - out frame oil cylinder 52 is fixedly connected to the main frame body 55, so that after a corresponding number of holes are drilled, the main frame body 55 can move to move the drilling machine main body 3 away from the old road surface, and then the vehicle body 1 can move forward smoothly to a new drilling position, and then the main frame body 55 drives the drilling machine main body 3 to move close to the lateral side of the old road surface again.

[0056] Refer to Figure 2, the removal rack 5 further includes buffer sliders 56 slidably connected to the main frame 55 along the width direction of the vehicle body 1. A vertical row of several drill body 3 are fixedly connected to the vertical side of each buffer slider 56 facing the vehicle body 1. A buffer spring 58 is fixedly connected to the vertical side of the buffer slider 56 away from the vehicle body 1. One end of the buffer spring 58 away from the vehicle body 1 is fixedly connected to a frame block 57, and the frame block 57 is fixedly connected to the main frame 55, so that the pressure between the drill bit of the drill body 3 and the old road surface increases slowly. A limit rod 43 is threadedly connected to the side of the frame block 57 away from the buffer spring 58. The length direction of the limit rod 43 is consistent with the width direction of the vehicle body 1. One end of the limit rod 43 penetrates through the limit rod 43 and is inserted into the buffer spring 58. The buffer slider 56 can abut against the limit rod 43, so that the drill body 3 can have enough thrust to drill holes.

[0057] Refer to Figure 4 , all the limit rods 43 on the same side of the vehicle body 1 are rotatably connected to the same synchronization slider 44. The synchronization slider 44 is slidably connected to the main frame 55 along the width direction of the vehicle body 1. Each limit rod 43 is coaxially fixedly connected with a rod sheave 45 located in the synchronization slider 44. There is a middle sheave 46 between adjacent two rod sheaves 45. The middle sheave 46 is rotatably connected to the synchronization slider 44. Two circumferential sheaves 47 are rotatably connected inside the synchronization slider 44. The two circumferential sheaves 47 are respectively close to the two farthest rod sheaves 45. Transmission belts 48 are connected between the rod sheave 45, the middle sheave 46 and the circumferential sheave 47. The transmission belt 48 is in a serpentine transmission between the rod sheave 45 and the middle sheave 46, so that all the limit rods 43 rotate stably. The rod sheave 45 close to the middle position of the synchronization slider 44 is coaxially fixedly connected with a turntable 49, and the turntable 49 is exposed outside the synchronization slider 44. By rotating the turntable 49, all the limit rods 43 on the same side of the vehicle body 1 can be driven to rotate synchronously, so as to adjust the buffer distance of all the drill bodies 3 on the same side of the vehicle body 1.

[0058] Refer to Figure 2 , for each drill body 3, the buffer slider 56 is fixedly connected with a nozzle 33 and an air nozzle 34. The nozzle 33 is communicated with a water pump located inside the vehicle body 1 to spray water on the lateral side of the old road surface horizontally before the drill body 3 drills holes. The air nozzle 34 is communicated with a high-pressure air pump and an air electric heater located inside the vehicle body 1 to spray high-pressure hot air into the formed hole after the drill body 3 finishes drilling holes, so as to clean and dry the impurities inside the hole.

[0059] Refer to Figure 5, the drill bit diameters of several drill body 3 on the same side of the vehicle body 1 are different. The closer the drill body 3 is to the front end in the moving direction of the vehicle body 1, the smaller and longer the drill bit diameter is. And each time the vehicle body 1 moves forward, the drilling operation stops when the distance between two adjacent rows of drill bodies 3 is reached, so that the inner diameter of the opening of the formed hole is large, and the inner wall of the hole is stepped, and the inner diameter is smaller at the deeper position inside the hole, so that the inner space of the hole is more fully filled with the concrete slurry.

[0060] The implementation principle of a construction method for the joint between a new and an old concrete pavement in an embodiment of the present application is: forming several rows of holes on the two transverse sides of the old pavement, so as to obtain better connection strength between the new and old pavements and make the joint between the new and old pavements have better stability.

[0061] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A construction method for the joint between a new and an old cast-in-place concrete road surface, characterized in that: Specifically, it includes the following steps: Step 1: Compact the roadbeds on both sides of the old road surface and fill the roadbed cushion layer; Step 2: Use construction equipment to clean the two lateral sides of the old road surface; Step 3: Use construction equipment to open several rows of holes along the height direction of the old road surface on the lateral sides of the old road surface, and several holes in each row are evenly distributed along the road width; Step 4: Place tie bars into a row of holes corresponding to the lateral sides of the old road surface, and inject anchor glue into the holes where the tie bars are placed; Step 5: After the curing strength of the anchor glue reaches the standard, carry out steel bar binding on the tie bars; Step 6: Build a formwork, and pour and cure the concrete of the new road surface until the strength reaches the standard; The construction equipment includes a vehicle body (1) that can move horizontally along the old road surface, a width - adapting block (4) provided on the vehicle body (1), a rotating frame (2) provided on the width - adapting block (4), a moving - out frame (5) provided on the rotating frame (2), several drilling machine main bodies (3) provided on the side of the moving - out frame (5) away from the vehicle body (1) and capable of drilling the lateral sides of the old road surface, a moving - out frame moving device (51) provided on the rotating frame (2) and driving the moving - out frame (5) to move longitudinally along the old road surface, a cleaning frame (31) located at the front end in the moving direction of the vehicle body (1) and fixedly connected to the rotating frame (2), and a cleaning part (32) provided on the cleaning frame (31) for cleaning the lateral sides of the old road surface; the cleaning part (32) includes a cleaning air pipe (35) fixedly connected to the cleaning frame (31) and spraying gas towards the old road surface, a cleaning shovel (36) fixedly connected to the cleaning frame (31) and close to the lateral side of the old road surface cleaned by the gas sprayed from the cleaning air pipe (35), and a milling and planing main body (37) fixedly connected to the cleaning frame (31) for grinding the lateral side of the old road surface cleaned by the cleaning shovel (36); the cleaning shovel (36) includes a fixed block (38) fixedly connected to the cleaning frame (31), a moving inclined - surface block (39) slidably connected to the fixed block (38) along the forward movement direction of the vehicle body (1) and cleaning the lateral side of the old road surface, a pressure sensor (21) provided on the fixed block (38) capable of stopping the vehicle body (1) according to the received pressure value, and a compression spring (22) fixedly connected between the pressure sensor (21) and the moving inclined - surface block (39), and the compression spring (22) forces the pressure sensor (21) and the moving inclined - surface block (39) to move away from each other.

2. The construction method at the junction of new and old cast-in-place concrete pavements according to claim 1, characterized in that: The moving - out frame moving device (51) includes a moving - out frame oil cylinder (52) fixedly connected to the rotating frame (2) with its power rod fixedly connected to the moving - out frame (5), a rotating - frame slide rail (53) fixedly connected to the rotating frame (2), and a moving - out frame slide block (54) fixedly connected to the moving - out frame (5) and slidably connected to the rotating - frame slide rail (53).

3. The construction method for the joint between a new and an old cast-in-place concrete pavement according to claim 1, characterized in that: The removal frame (5) includes a main frame body (55) and several buffer sliders (56) longitudinally and slidably connected to the main frame body (55) along the old road surface. Each buffer slider (56) is detachably connected to a drilling machine main body (3). A frame body block (57) is fixedly connected to the main frame body (55) corresponding to each buffer slider (56). A buffer spring (58) is fixedly connected between the frame body block (57) and the buffer slider (56). The buffer spring (58) forces the buffer slider (56) away from the old road surface. A displacement limiting rod (43) that can abut against the buffer slider (56) is threadedly connected to the frame body block (57).

4. A construction method for the joint between a new and an old cast-in-place concrete road surface according to claim 3, characterized in that: A synchronization slider (44) is longitudinally and slidably connected to the main frame body (55) along the old road surface. The displacement limiting rod (43) is rotatably connected to the synchronization slider (44). A rod groove wheel (45) is coaxially and fixedly connected to one end of the displacement limiting rod (43) located in the synchronization slider (44). An intermediate groove wheel (46) is rotatably connected between two adjacent rod groove wheels (45). Two circumferential groove wheels (47) are rotatably connected in the synchronization slider (44). A transmission belt (48) is connected in transmission between the circumferential groove wheel (47), the intermediate groove wheel (46), and the rod groove wheel (45). A turntable (49) coaxially and fixedly connected to the intermediate groove wheel (46) or the rod groove wheel (45) is rotatably connected to the synchronization slider (44).

5. A construction method for the joint between a new and an old cast-in-place concrete pavement according to claim 1, characterized in that: The rotating frame (2) is rotatably connected to the width-adjusting block (4). A rotary oil cylinder (59) for driving the rotation of the rotating frame (2) is fixedly connected to the width-adjusting block (4). The width-adjusting block (4) is longitudinally and slidably connected to the vehicle body (1) along the old road surface. Width-adjusting blocks (4) are provided on both sides of the vehicle body (1). A bidirectional lead screw (41) that is threadedly connected to the width-adjusting block (4) and drives the two width-adjusting blocks (4) to approach or separate from each other is rotatably connected to the vehicle body (1). A bidirectional lead screw motor (42) for driving the rotation of the bidirectional lead screw (41) is provided on the vehicle body (1).

6. A construction method for the joint between a new and an old cast-in-place concrete road surface according to claim 1, characterized in that: A spray head (33) is fixedly connected to the removal frame (5) corresponding to each drilling machine main body (3). The spray head (33) is used to spray cooling water towards the drilling area on the lateral side of the old road surface in the transverse direction. A nozzle (34) is fixedly connected to the removal frame (5) corresponding to each drilling machine main body (3). The nozzle (34) is used to send hot air into the holes on the lateral side of the old road surface in the transverse direction.

7. A construction method for the joint between a new and an old cast-in-place concrete road surface according to claim 1, characterized in that: The inner diameter of the holes formed by the drilling machine main bodies (3) closer to the front end in the moving direction of the vehicle body (1) is smaller and deeper.

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