New and old roadbed connection treatment enhancing device and construction method

Abstract

The invention provides a new and old roadbed connection treatment enhancing device and a construction method, and relates to the field of pavement repair, the new and old roadbed connection treatment enhancing device comprises a carriage and a roller, butt joints are clamped at the two ends of the roller, a stretching mechanism is arranged on the inner sides of the butt joints, and the stretching mechanism comprises a base. In order to solve the problems that in the prior art, laying of the steel-plastic grating is completed manually, so that the laid steel-plastic grating is not smooth enough, manual fixing is needed, and strength lacks, the stretching mechanism is arranged, after the steel-plastic grating is laid on a dragging plate, a roller is rotated through friction between the roller and the ground, and the steel-plastic grating is laid on the dragging plate; and meanwhile, when the ejector rod resets and stretches out from the lowest point, the ejector plate on the side face is pulled to push the U-shaped fixing frame to the outer side, the U-shaped fixing frame fixes the steel-plastic grating to the ground, and enhancement of connection treatment of the new roadbed and the old roadbed is achieved. The steel-plastic grating is moved to the ground through the ejector rod, rolling treatment is conducted on the steel-plastic grating through the roller, and meanwhile, when the ejector rod resets and stretches out from the lowest point, the ejector plate on the side face is pulled to push the U-shaped fixing frame to the outer side.

Description

Technical Field

[0001] The invention relates to the field of road surface repair, and in particular to a new and old roadbed connection treatment reinforcement device and a construction method. Background Art

[0002] With the acceleration of urbanization and the continuous increase in the number of vehicles, road traffic conditions are becoming increasingly congested. Widening roads has become an effective means to alleviate traffic pressure. In road widening and reconstruction projects, cracks often appear at the junction of the new and old roadbeds. The fundamental reason for the cracks is that the new and old roadbeds produce uneven settlement and the interface strength between the new and old roads is lower than the strength of the structural layer material itself. Due to the large bending tensile stress and low interface strength at the junction of the new and old roads, cracks are very likely to occur in such locations, resulting in longitudinal cracks often appearing at the junction of the new and old roadbeds. Therefore, it is necessary to use full-paving of steel-plastic gratings, but currently manual paving is used, resulting in the steel-plastic gratings being not flat enough and lacking strength after paving.

[0003] For example: the Chinese utility model patent (application number: CN202121865037.2) discloses an "automatic fixing device for U-shaped nails used for laying steel-plastic gratings". Its specification discloses: When the expressway is rebuilt and expanded, due to certain differences in the compaction and strength of the new and old roadbeds, after the opening to traffic, differential settlement will occur under the action of vehicle loads, affecting the quality of the project. In order to reduce the settlement of the new roadbed, enhance the bearing capacity of the roadbed soil, and better connect the new and old roadbeds together, steel-plastic gratings will be laid in the roadbed soil during construction and fixed with U-shaped nails to enhance the tensile strength and stability of the overlap of the steel-plastic gratings. At present, the laying of steel-plastic gratings is done manually, resulting in the steel-plastic gratings not being flat enough after laying and requiring manual fixation and lack of strength; the above patents can prove the defects of the prior art.

[0004] Therefore, we have made improvements to this and proposed a reinforcement device and construction method for the connection between the new and old roadbeds. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing steel-plastic grating is laid manually, which results in the steel-plastic grating being not flat after laying and requiring manual fixation and lacking strength.

[0006] In order to achieve the above-mentioned purpose of the invention, the present invention provides the following new and old roadbed connection treatment reinforcement device and construction method to improve the above-mentioned problems.

[0007] The specific application is as follows:

[0008] The new and old roadbed connection treatment and reinforcement device comprises a drag plate and a roller, both ends of the roller are clamped with a butt joint, the inner side of the butt joint is provided with a stretching mechanism, the stretching mechanism comprises a base, the base is fixedly installed on the inner side of the butt joint, four push rods are equiangularly slidably installed inside the base, the inner side of the push rod is fixedly connected with a high-pressure spring, the inner end of the high-pressure spring is fixedly connected to the inside of the base, a rotating shaft is penetrated through the middle of the roller, and the butt joint and the base are both clamped and sleeved on the rotating shaft;

[0009] The inner end side surfaces of the top rod are fixedly connected with magnetic plates, and the magnetic plates are magnetic. Four telescopic slots are opened at equal angles on the outer side of the base, and a telescopic rod is slidably clamped inside the telescopic slot. The outer side of the telescopic rod is fixedly connected with a top plate, and the top plate is sealed in the middle of the telescopic slot in a natural state. The outer end of the magnetic plate is always adsorbed on the inner end top of the telescopic rod, and a U-shaped fixing frame is provided on the inner side of the telescopic slot;

[0010] The top rod is squeezed by the bottom to enter the interior of the base, and the telescopic rod and the top plate are pulled inward by the magnetic suction plate. The U-shaped fixing frame inside the telescopic groove enters the interior of the telescopic groove. When the top rod is extended again, the synchronously moving top plate squeezes the U-shaped fixing frame outward and fixes the steel-plastic grille on the ground.

[0011] As a preferred technical solution of the present application, as a preferred technical solution of the present application, grooves are provided on both sides of the bottom of the drag plate and correspond to the moving routes of the top rod respectively, and a steel-plastic grille is placed on the surface of the drag plate. When the drum rotates, the top rod is inserted into the hole of the steel-plastic grille and the steel-plastic grille is moved downward to the ground.

[0012] As a preferred technical solution of the present application, both ends of the rotating shaft are located on the inner side of the push rod and are rotatably installed with rotating rings, both ends of the rotating shaft are threadedly connected with extrusion rods, and the rotating shaft is located on the inner side of the push rod and has four mounting holes opened at equal angles, and a limiting rod is installed inside the mounting hole to support the inner side through a return spring, and the inner end of the limiting rod abuts against the inner end side of the extrusion rod.

[0013] As a preferred technical solution of the present application, the rotating ring is located on the outside of the limiting rod, and four clamping holes are opened at equal angles on the surface of the rotating ring. The limiting rod extends outward and is clamped inside the clamping hole. A traction rope is fixedly connected to the top of the inner cavity of the top rod, and the inner end of the traction rope is fixedly connected to the outside of the rotating ring.

[0014] As a preferred technical solution of the present application, the extrusion rod is threadedly connected to the inside of the rotating shaft. The extrusion rod moves inward so that the limit rod is engaged with the card hole to fix the rotating ring. The base rotates to wrap the traction rope around the rotating shaft and retracts the push rod to the inner side of the base, so that the push rod is detached from the surface of the drum.

[0015] As a preferred technical solution of the present application, a feeding mechanism is provided in the middle of the drum, and the feeding mechanism includes a fixing ring, which is fixedly installed in the middle of the inner cavity of the drum and rotatably sleeved on the rotating shaft.

[0016] As a preferred technical solution of the present application, fixed toothed rings are provided on both sides of the fixed ring, a guide rod is fixedly installed in the middle of the fixed toothed ring, the guide rod passes through and is slidably clamped in the middle of the rotating shaft, a support spring is sleeved on the guide rod, and the two ends of the support spring are respectively fixedly supported between the inner wall of the fixed toothed ring and the outer wall of the rotating shaft.

[0017] As a preferred technical solution of the present application, the fixed gear ring is tilted downward at forty-five degrees, and the surface of the fixed gear ring is provided with teeth. Four threaded rods are installed on the side of the fixed ring for equal angle rotation. The middle part of the threaded rod is located on both sides of the fixed ring and is fixedly clamped with driven gears. When the driven gear rotates to the side of the fixed gear ring, it engages with the fixed gear ring.

[0018] As a preferred technical solution of the present application, a sliding sleeve is provided on the surface of the threaded rod, four groups of guide plates are fixedly installed on both sides of the fixing ring, the U-shaped fixing frame array is slidably clamped inside the guide plate, the sliding block is slidably clamped inside the guide plate, and the sliding block is located at the innermost side of the U-shaped fixing frame to squeeze the U-shaped fixing frame.

[0019] The construction method of the connection between the new and old roadbed is as follows:

[0020] Step 1: Remove the topsoil and thoroughly clean the surface of the old road slope, with a normal thickness of no less than 30cm;

[0021] Step 2: Step excavation. After the slope is cleared, the number of steps is determined according to the height of the roadbed. Then, from bottom to top, excavate layer by layer. After excavating one step, fill one step in time. The steps are inclined inwards at a slope of 3%;

[0022] Step 3: Laying of steel-plastic grating, the steel-plastic grating is fully laid;

[0023] Step 4: Place the steel-plastic grille on the top of the trailer, and then place the trailer on the tail of the trailer. The trailer tows the trailer and the roller to move. At this time, the roller will rotate relative to the shaft, and the steel-plastic grille will be moved downward through the top rod and rolled by the roller;

[0024] Step 5. After the steel-plastic grating is rolled onto the ground, the top plate is used to squeeze out the U-shaped fixing frame through the action of the high-pressure spring inside the base, and the steel-plastic grating is fixed to the ground, thereby increasing the strength of the connection between the new and old roadbeds.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] In the scheme of this application:

[0027] 1. In order to solve the problem that the laying of steel-plastic grating in the prior art is all done manually, resulting in the steel-plastic grating being not flat enough after laying and requiring manual fixing and lack of strength, the present application sets a stretching mechanism. After the steel-plastic grating is laid on the drag plate, the friction between the roller and the ground causes the roller to rotate, thereby causing the top rod to move the steel-plastic grating to the ground, and the steel-plastic grating is rolled by the roller. At the same time, when the top rod is reset and extended from the lowest point, the top plate on the side is pulled to push the U-shaped fixing frame outward, and the U-shaped fixing frame fixes the steel-plastic grating to the ground, thereby enhancing the connection between the new and old roadbeds;

[0028] 2. In order to solve the problem that the steel-plastic grille needs to be fixed manually in the prior art, the present application sets a feeding mechanism, utilizes the contact between the driven gear and the fixed gear ring, and enables the U-shaped fixing frame located on one side of the fixed gear ring to automatically load the material under the drive of the slider, so that the U-shaped fixing frame moves to the inside of the telescopic slot, and pushes the U-shaped fixing frame out through the top plate and inserts it into the ground to directly fix the steel-plastic grille, thereby realizing automatic feeding and automatic fixing of the steel-plastic grille and reducing labor consumption;

[0029] 3. Through the cooperation of the stretching mechanism and the extrusion rod, when the extrusion rod rotates and moves to the innermost part, the extrusion rod squeezes the limit rod so that the limit rod extends outward to fix the rotating ring to the rotating shaft to stop rotation. At this time, when the base rotates, the traction rope will be wrapped around the rotating ring, so that the top rod will be retracted to the inside of the base. At this time, the top rod is separated from the drum, and the base can be removed from both ends of the drum, which is convenient for maintenance and replenishment of materials. It can not only move the steel-plastic grille, but also fix the drum, and the base can be disassembled after structural conversion. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of the new and old roadbed connection treatment and enhancement device provided in this application;

[0031] Figure 2 A schematic diagram of the side structure of the drum of the new and old roadbed connection treatment and enhancement device provided in this application;

[0032] Figure 3 A schematic diagram of the drum structure of the new and old roadbed connection treatment and enhancement device provided in this application;

[0033] Figure 4 A schematic diagram of the internal structure of the drum of the new and old roadbed connection treatment and enhancement device provided in this application;

[0034] Figure 5 A front cross-sectional view of the new and old roadbed connection treatment and enhancement device provided for this application;

[0035] Figure 6 A side sectional view of the new and old roadbed connection treatment and reinforcement device provided in this application;

[0036] Figure 7 A schematic diagram of the coordination structure of the feeding mechanism and the stretching mechanism of the new and old roadbed connection treatment and reinforcement device provided in this application;

[0037] Figure 8 A schematic diagram of the structure of the feeding mechanism of the new and old roadbed connection treatment and enhancement device provided in this application;

[0038] Fig. 9 A schematic diagram of the structure of the stretching mechanism of the new and old roadbed connection treatment and reinforcement device provided in this application;

[0039] Fig.10 A schematic diagram of the internal structure of the rotating shaft of the new and old roadbed connection processing and enhancement device provided in this application.

[0040] Indicated in the figure:

[0041] 1. Drag board; 101. Connecting plate; 102. Roller; 103. Butt joint; 104. Rotating shaft; 105. Rotating ring; 106. Extrusion rod; 107. Return spring; 108. Limit rod; 109. Clamp hole; 110. Mounting hole;

[0042] 2. stretching mechanism; 201. base; 202. telescopic slot; 203. top rod; 204. telescopic rod; 205. top plate; 206. magnetic plate; 207. high-pressure spring; 208. traction rope;

[0043] 3. Feeding mechanism; 301. Fixed ring; 302. Guide plate; 303. U-shaped fixing frame; 304. Threaded rod; 305. Driven gear; 306. Sliding block; 307. Fixed gear ring; 308. Guide rod; 309. Support spring. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0045] As described in the background art, the laying of the steel-plastic grating is done manually, which results in the steel-plastic grating being not flat after laying and requiring manual fixation and lacking strength.

[0046] In order to solve this technical problem, the present invention provides a new-old roadbed connection treatment reinforcement device and a construction method, which are applied to the connection between the new and old roadbeds.

[0047] Specifically, please refer to Figure 1-Figure 10 The new and old roadbed connection treatment and enhancement device specifically includes a drag plate 1 and a roller 102, both ends of the roller 102 are clamped with a docking joint 103, the inner side of the docking joint 103 is provided with a stretching mechanism 2, the stretching mechanism 2 includes a base 201, the base 201 is fixedly installed on the inner side of the docking joint 103, four push rods 203 are slidably installed at equal angles inside the base 201, the inner side of the push rod 203 is fixedly connected with a high-pressure spring 207, the inner end of the high-pressure spring 207 is fixedly connected to the inside of the base 201, a rotating shaft 104 is penetrated through the middle of the roller 102, and the docking joint 103 and the base 201 are both clamped and sleeved on the rotating shaft 104;

[0048] The inner end side surfaces of the top rod 203 are fixedly connected with magnetic plates 206, which are magnetic. Four telescopic slots 202 are opened at equal angles on the outer side of the base 201. The telescopic rod 204 is slidably connected inside the telescopic slot 202. The outer side of the telescopic rod 204 is fixedly connected with a top plate 205. The top plate 205 is sealed in the middle of the telescopic slot 202 in a natural state. The outer end of the magnetic plate 206 is always adsorbed on the inner end top of the telescopic rod 204. A U-shaped fixing frame 303 is provided on the inner side of the telescopic slot 202.

[0049] The top rod 203 is squeezed by the bottom to enter the interior of the base 201, and pulls the telescopic rod 204 and the top plate 205 to move inward through the magnetic suction plate 206, and the U-shaped fixing frame 303 inside the telescopic groove 202 enters the interior of the telescopic groove 202. When the top rod 203 is extended again, the synchronously moving top plate 205 squeezes the U-shaped fixing frame 303 outward and fixes the steel-plastic grille on the ground;

[0050] Grooves are provided on both sides of the bottom of the carriage 1 and correspond to the moving routes of the top rod 203. A steel-plastic grille is placed on the surface of the carriage 1. When the roller 102 rotates, the top rod 203 is inserted into the hole of the steel-plastic grille and the steel-plastic grille is moved down to the ground.

[0051] By rotating the roller 102, the top rod 203 moves the steel-plastic grille on the top of the drag plate 1 to the ground, and the steel-plastic grille is rolled and flattened by the gravity of the roller 102. At the same time, when the top rod 203 moves to the bottom, it is squeezed and automatically compressed, so that when the top rod 203 is reset again under the action of the high-pressure spring 207, the telescopic rod 204 can be pushed outward, and then the top plate 205 squeezes the U-shaped fixing frame 303 downward, so that the U-shaped fixing frame 303 fixes the steel-plastic grille to the ground, thereby realizing automatic laying and fixing of the steel-plastic grille, thereby reducing labor consumption and enhancing the connection between the new and old roadbeds.

[0052] The device for strengthening the connection between the old and new roadbeds provided by the present invention is designed to solve the problem that the laying of the steel-plastic grating in the prior art is all done manually, resulting in the steel-plastic grating being not flat enough after laying and requiring manual fixation and lack of strength. The present application uses a stretching mechanism 2 to, after laying the steel-plastic grating on the drag plate 1, rotate the roller 102 through the friction between the roller 102 and the ground, thereby causing the top rod 203 to move the steel-plastic grating to the ground, and rolling the steel-plastic grating through the roller 102. At the same time, when the top rod 203 is reset and extended from the lowest point, the top plate 205 on the traction side pushes the U-shaped fixing frame 303 outward, and causes the U-shaped fixing frame 303 to fix the steel-plastic grating to the ground, thereby enhancing the connection between the new and old roadbeds.

[0053] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0054] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0055] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0056] Example 1, please refer to Figure 1-Figure 3 , Fig. 9 and Fig.10The new and old roadbed connection treatment and strengthening device has two ends of the rotating shaft 104 located on the inner side of the top rod 203 and rotatably installed with a rotating ring 105. Both ends of the rotating shaft 104 are threadedly connected with an extrusion rod 106. The rotating shaft 104 is located on the inner side of the top rod 203 and has four mounting holes 110 at equal angles. The interior of the mounting hole 110 is supported and installed with a limit rod 108 inwardly through a return spring 107. The inner end of the limit rod 108 abuts against the inner end side of the extrusion rod 106. The rotating ring 105 is located at the limit rod 108. On the outside, four clamping holes 109 are opened at equal angles on the surface of the rotating ring 105, and the limiting rod 108 extends outward and is clamped in the inside of the clamping hole 109. The top of the inner cavity of the top rod 203 is fixedly connected with a traction rope 208, and the inner end of the traction rope 208 is fixedly connected to the outside of the rotating ring 105. The extrusion rod 106 is threadedly connected to the inside of the rotating shaft 104. The extrusion rod 106 moves inward, so that the limiting rod 108 is clamped in the clamping hole 109 to fix the rotating ring 105, and the base 201 rotates to wrap the traction rope 208 The roller 102 and the base 201 are rotated to move the extrusion rod 106 inward, so that the inner end of the extrusion rod 106 squeezes the inner end of the limit rod 108, so that the limit rod 108 extends outward to fix the rotating ring 105. At this time, the roller 102 and the base 201 continue to rotate, which will cause the traction rope 208 to be wound around the rotating ring 105, thereby causing the top rod 203 to move inward. The extension rod 204 and the top plate 205 move inward synchronously, so that the base 201 on both sides of the drum 102 loses the limiting effect of the top rod 203, and the base 201 can be disassembled, so as to facilitate maintenance and replenishment of materials. When the extrusion rod 106 moves to the outside, the limiting rod 108 moves inward under the action of the return spring 107, so that the rotating ring 105 can rotate on the rotating shaft 104, and the traction rope 208 will not be entangled with the surface of the rotating ring 105.

[0057] By cooperating with the extrusion rod 106 through the provided stretching mechanism 2, when the extrusion rod 106 rotates and moves to the innermost part, the extrusion rod 106 squeezes the limit rod 108, so that the limit rod 108 extends outward to fix the rotating ring 105 to the rotating shaft 104 and stops rotating. At this time, when the base 201 rotates, the traction rope 208 will be wound around the rotating ring 105, so that the top rod 203 is retracted to the inside of the base 201. At this time, the top rod 203 is separated from the drum 102, and the base 201 can be removed from both ends of the drum 102, so as to facilitate maintenance and replenishment of materials, thereby achieving not only the movement of the steel-plastic grille, but also the fixing of the drum 102, and the disassembly of the base 201 after structural conversion.

[0058] Example 2 further optimizes the new and old roadbed connection treatment enhancement device provided in Example 1. Specifically, Figure 5-Figure 8 As shown, a feeding mechanism 3 is provided in the middle of the drum 102, and the feeding mechanism 3 includes a fixing ring 301, which is fixedly installed in the middle of the inner cavity of the drum 102, and the fixing ring 301 is rotatably sleeved on the rotating shaft 104, and both sides of the fixing ring 301 are provided with a fixing toothed ring 307, and a guide rod 308 is fixedly installed in the middle of the fixing toothed ring 307, and the guide rod 308 penetrates and slides and is connected to the middle of the rotating shaft 104, and a support spring 309 is sleeved on the guide rod 308, and the support spring 309 is sleeved on the guide rod 308. The two ends of 09 are respectively fixedly supported between the inner wall of the fixed gear ring 307 and the outer wall of the rotating shaft 104. The fixed gear ring 307 is tilted downward by 45 degrees. The surface of the fixed gear ring 307 is provided with teeth. Four threaded rods 304 are installed on the side of the fixed ring 301 at equal angles. The middle part of the threaded rod 304 is located on both sides of the fixed ring 301 and is fixedly connected with a driven gear 305. When the driven gear 305 rotates to the side of the fixed gear ring 307, it meshes with the fixed gear ring 307. The threaded rods 304 are fixedly connected to the fixed gear ring 307. The surface sliding sleeve of the rod 304 is provided with a slider 306, and four groups of guide plates 302 are fixedly installed on both sides of the fixing ring 301. The U-shaped fixing frame 303 array is slidably clamped inside the guide plate 302, and the slider 306 is slidably clamped inside the guide plate 302. The slider 306 is located at the innermost side of the U-shaped fixing frame 303 to squeeze the U-shaped fixing frame 303, and the fixing gear ring 307 is arranged on the outer side of the fixing ring 301 by tilting downward forty-five degrees. When the fixing ring 301 rotates with the threaded rod 304, the driven gear 305 in the middle of the threaded rod 304 engages with the fixed gear ring 307 one by one. When engaging with the fixed gear ring 307, the threaded rod 304 where the driven gear 305 is located rotates, which will cause the slider 306 to move outward, so that the slider 306 squeezes the U-shaped fixing frame 303 outward, thereby realizing automatic loading, and when the top rod 203 moves the top plate 205 to the inside of the base 201, it moves outward to the inside of the telescopic slot 202.

[0059] In order to solve the problem in the prior art that manual work is required to fix the steel-plastic grating, the present application sets up a feeding mechanism 3, utilizes the contact between the driven gear 305 and the fixed gear ring 307, so that the U-shaped fixing frame 303 located on one side of the fixed gear ring 307 is driven by the slider 306 to automatically load the material, so that the U-shaped fixing frame 303 is moved to the inside of the telescopic groove 202, and the U-shaped fixing frame 303 is pushed out and inserted into the ground through the top plate 205 to directly fix the steel-plastic grating, thereby realizing automatic loading and automatic fixing of the steel-plastic grating and reducing labor consumption.

[0060] Embodiment 3, the construction method of connecting the new and old roadbeds, specifically, the method is as follows:

[0061] Step 1: Clear the topsoil and thoroughly clear the surface layer of the old roadside slope. The normal thickness of the topsoil clearing shall not be less than 30 cm;

[0062] Step 2: Excavate steps. After the slope is cleared, first determine the number of steps according to the filling height of the subgrade, and then excavate layer by layer from bottom to top. Fill each excavated layer in time. The steps shall have an inward slope of 3%;

[0063] Step 3: Lay the steel-plastic grille. The steel-plastic grille is laid in a full-paved manner. When the pavement thickness + 80 cm < h < 2 m, only one layer of steel-plastic grille is set in the middle of the roadbed and at the bottom of the subgrade. When h > 2 m, one layer of steel-plastic grille is set in the middle of the roadbed, at the bottom, and at the base of the subgrade respectively;

[0064] Step 4: Place the steel-plastic grille on the top of the drag plate 1, and then place the drag plate at the tail of the trailer. The trailer is used to tow the drag plate 1 and the roller 102 to move. At this time, the roller 102 will rotate relative to the rotating shaft 104. The steel-plastic grille is moved downward through the ejector rod 203 and rolled by the roller 102;

[0065] Step 5: After the steel-plastic grille is rolled onto the ground, immediately, under the action of the high-pressure spring 207 inside the base 201, the top plate 205 extrudes the U-shaped fixing bracket 303, and fixes the steel-plastic grille to the ground, thereby increasing the strength at the connection between the new and old subgrades.

[0066] The using process of the device and construction method for enhancing the connection between the new and old subgrades provided by the present invention is as follows:

[0067] By rotating the roller 102, the ejector rod 203 moves the steel-plastic grille on the top of the drag plate 1 to the ground, and rolls the steel-plastic grille by the gravity of the roller 102 for flattening treatment. At the same time, when the ejector rod 203 moves to the bottommost position and is squeezed, it will automatically compress. Thus, when the ejector rod 203 is reset under the action of the high-pressure spring 207 again, it can push the telescopic rod 204 outwards, and further make the top plate 205 squeeze the U-shaped fixing bracket 303 downward, so that the U-shaped fixing bracket 303 fixes the steel-plastic grille to the ground, thereby realizing the automatic laying and fixing of the steel-plastic grille;

[0068] The extrusion rod 106 is rotated to move inward, so that the inner end of the extrusion rod 106 squeezes the inner end of the limiting rod 108, so that the limiting rod 108 extends outward and is engaged between the rotating ring 105 and the rotating shaft 104, fixing the rotating ring 105. At this time, the drum 102 and the base 201 continue to rotate, which will cause the traction rope 208 to be wound around the rotating ring 105, thereby causing the top rod 203 to move inward, and pulling the telescopic rod 204 and the top plate 205 to move inward synchronously, so that the base 201 on both sides of the drum 102 loses the limiting effect of the top rod 203, and the base 201 can be disassembled, which is convenient for maintenance and replenishment of materials. When the extrusion rod 106 moves to the outside, the limiting rod 108 moves inward under the action of the return spring 107, so that the rotating ring 105 can rotate on the rotating shaft 104, and the traction rope 208 will not be wound around the surface of the rotating ring 105.

[0069] The fixed gear ring 307 is tilted downward forty-five degrees and is set on the outside of the fixed ring 301. When the fixed ring 301 rotates with the threaded rod 304, the driven gear 305 in the middle of the threaded rod 304 engages with the fixed gear ring 307 one by one. When engaging with the fixed gear ring 307, the threaded rod 304 where the driven gear 305 is located rotates, which will cause the slider 306 to move outward, so that the slider 306 squeezes the U-shaped fixing frame 303 outward, thereby realizing automatic loading, and when the top rod 203 moves the top plate 205 to the inside of the base 201, the U-shaped fixing frame 303 moves outward to the inside of the telescopic slot 202.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A device for strengthening the connection between new and old roadbeds, characterized in that: The invention comprises a drag plate (1) and a roller (102), wherein both ends of the roller (102) are clamped with a docking head (103), a stretching mechanism (2) is arranged on the inner side of the docking head (103), and the stretching mechanism (2) comprises a base (201), wherein the base (201) is fixedly mounted on the inner side of the docking head (103), four push rods (203) are slidably mounted at equal angles inside the base (201), a high-pressure spring (207) is fixedly connected to the inner side of the push rod (203), and the inner end of the high-pressure spring (207) is fixedly connected to the inner side of the base (201), and a rotating shaft (104) is passed through the middle of the roller (102), and the docking head (103) and the base (201) are both clamped and sleeved on the rotating shaft (104); The inner end side surfaces of the top rod (203) are fixedly connected with magnetic plates (206), and the magnetic plates (206) are magnetic. Four telescopic grooves (202) are opened at equal angles on the outer side of the base (201). The telescopic rod (204) is slidably clamped inside the telescopic groove (202). The outer side of the telescopic rod (204) is fixedly connected with a top plate (205). The top plate (205) is sealed in the middle of the telescopic groove (202) in a natural state. The outer end of the magnetic plate (206) is always adsorbed on the inner end top of the telescopic rod (204), and a U-shaped fixing frame (303) is provided on the inner side of the telescopic groove (202); The top rod (203) is squeezed by the bottom to enter the interior of the base (201), and pulls the telescopic rod (204) and the top plate (205) to move inward through the magnetic attraction plate (206), and the U-shaped fixing frame (303) inside the telescopic groove (202) enters the interior of the telescopic groove (202). When the top rod (203) is extended again, the synchronously moving top plate (205) squeezes the U-shaped fixing frame (303) outward and fixes the steel-plastic grille on the ground.

2. The new and old roadbed connection treatment and reinforcement device according to claim 1 is characterized in that: Both sides of the bottom of the drag plate (1) are provided with grooves corresponding to the moving routes of the top rod (203) respectively. A steel-plastic grille is placed on the surface of the drag plate (1). When the roller (102) rotates, the top rod (203) is inserted into the hole of the steel-plastic grille and the steel-plastic grille is moved downward to the ground.

3. The new and old roadbed connection treatment and reinforcement device according to claim 2 is characterized in that: The two ends of the rotating shaft (104) are located inside the push rod (203) and are rotatably mounted with a rotating ring (105). The two ends of the rotating shaft (104) are both threadedly connected with an extrusion rod (106). The rotating shaft (104) is located inside the push rod (203) and is provided with four mounting holes (110) at equal angles. A limiting rod (108) is mounted inside the mounting hole (110) and is supported inwardly by a return spring (107). The inner end of the limiting rod (108) abuts against the inner end side of the extrusion rod (106).

4. The new and old roadbed connection treatment and reinforcement device according to claim 3 is characterized in that: The rotating ring (105) is located on the outside of the limiting rod (108); four clamping holes (109) are provided on the surface of the rotating ring (105) at equal angles; the limiting rod (108) extends outward and is clamped inside the clamping holes (109); a traction rope (208) is fixedly connected to the top of the inner cavity of the top rod (203); and the inner end of the traction rope (208) is fixedly connected to the outside of the rotating ring (105).

5. The new and old roadbed connection treatment and reinforcement device according to claim 4 is characterized in that: The extrusion rod (106) is threadedly connected to the inside of the rotating shaft (104). The extrusion rod (106) moves inward, so that the limit rod (108) is clamped into the clamping hole (109) to fix the rotating ring (105). The base (201) rotates to wrap the traction rope (208) around the rotating shaft (104), and the push rod (203) is stored inside the base (201), so that the push rod (203) is detached from the surface of the roller (102).

6. The device for strengthening the connection between the new and old roadbeds according to claim 5 is characterized in that: A feeding mechanism (3) is provided in the middle of the drum (102), and the feeding mechanism (3) comprises a fixing ring (301). The fixing ring (301) is fixedly installed in the middle of the inner cavity of the drum (102), and the fixing ring (301) is rotatably sleeved on the rotating shaft (104).

7. The device for strengthening the connection between the new and old roadbeds according to claim 6 is characterized in that: A fixed toothed ring (307) is provided on both sides of the fixed ring (301), a guide rod (308) is fixedly installed in the middle of the fixed toothed ring (307), the guide rod (308) penetrates and is slidably engaged in the middle of the rotating shaft (104), a support spring (309) is sleeved on the guide rod (308), and two ends of the support spring (309) are respectively fixedly supported between the inner wall of the fixed toothed ring (307) and the outer wall of the rotating shaft (104).

8. The device for strengthening the connection between the new and old roadbeds according to claim 7 is characterized in that: The fixed gear ring (307) is tilted downward at forty-five degrees, and teeth are provided on the surface of the fixed gear ring (307). Four threaded rods (304) are installed on the side of the fixed ring (301) for rotation at equal angles. The middle of the threaded rods (304) is located on both sides of the fixed ring (301) and is fixedly clamped with a driven gear (305). When the driven gear (305) rotates to the side of the fixed gear ring (307), it meshes with the fixed gear ring (307).

9. The device for strengthening the connection between the new and old roadbeds according to claim 8 is characterized in that: The surface of the threaded rod (304) is slidably sleeved with a slider (306); four groups of guide plates (302) are fixedly installed on both sides of the fixing ring (301); the array of U-shaped fixing frames (303) is slidably clamped inside the guide plates (302); the slider (306) is slidably clamped inside the guide plates (302); the slider (306) is located at the innermost side of the U-shaped fixing frame (303) to squeeze the U-shaped fixing frame (303).

10. A construction method for connecting the old and new roadbeds, using the reinforcement device as claimed in claim 9, characterized in that: Here’s how: Step 1: Remove the topsoil and thoroughly clean the surface of the old road slope, with a normal thickness of no less than 30cm; Step 2: Step excavation. After the slope is cleared, the number of steps is determined according to the height of the roadbed. Then, from bottom to top, excavate layer by layer. After excavating one step, fill one step in time. The steps are inclined inwards at a slope of 3%; Step 3: Laying of steel-plastic grating, the steel-plastic grating is fully laid; Step 4: Place the steel-plastic grille on the top of the carriage (1), then place the carriage on the rear of the trailer, and use the trailer to pull the carriage (1) and the roller (102) to move. At this time, the roller (102) will rotate relative to the rotating shaft (104), and the steel-plastic grille will be moved downward by the top rod (203) and rolled by the roller (102); Step 5: After the steel-plastic grille is rolled onto the ground, the top plate (205) squeezes out the U-shaped fixing frame (303) through the action of the high-pressure spring (207) inside the base (201), and fixes the steel-plastic grille to the ground, thereby increasing the strength of the junction between the new and old roadbeds.

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