Road mixing and paving structure and construction device

Abstract

The utility model relates to the technical field of road construction, in particular to a road mixing and paving structure and a road construction device.The road mixing and paving structure comprises a plurality of mixing rods arranged side by side, every two adjacent mixing rods are connected with a transmission mechanism respectively, and the transmission mechanism drives the two adjacent mixing rods to rotate oppositely through a connected power source; the two adjacent mixing rods are respectively provided with a positive spiral sheet and a negative spiral sheet, the outer sides of the mixing rods are provided with steel plate guardrails with adjustable ground clearance, the mixing and paving structure further comprises rolling wheels, the rolling wheels are fixedly connected with the steel plate guardrails through connecting rods, the connecting rods are connected with the rolling wheels through telescopic rod pieces, and the telescopic rod pieces are fixedly connected with the steel plate guardrails. The two mixing rod rotating structures are driven by the power mechanism to rotate, mixing is automatically achieved, meanwhile, the walking wheels are arranged and used for walking while mixing is conducted on the road surface, the mixing efficiency is greatly improved, the mixing rods of the spiral structures can conduct uniform mixing, and the construction quality of the clay-bound macadam road surface is fully guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of rural road construction, in particular to a road mixing and paving structure and a construction device for a mud-bound gravel road surface or a road surface base. Background Art

[0002] Existing road surface types include asphalt road surface, cement road surface, cobblestone road surface, gravel road surface and lawn road surface, etc. Different road surface structures have different advantages and disadvantages. Gravel road surface is very suitable for rural roads because of its low thickness and flatness and low cost. It uses gravel of different sizes to form a solid road surface. However, when driving on a gravel road surface, stones may fly up, which may cause damage to vehicles or injuries to pedestrians. At the same time, since there is no adhesion between gravel, the road surface is loose when vehicles are driving, which may easily cause road depressions and potholes, and requires frequent maintenance.

[0003] In view of the above problems existing in the gravel pavement, the improved mud-bonded gravel pavement is adopted. The mud-bonded gravel pavement is formed by rolling and compacting gravel and soil. The mud-bonded gravel pavement has certain strength and stability, but the strength and stability depend on the interlocking effect of the gravel, and the soil bonding plays an auxiliary role. The interlocking effect of the gravel is mainly related to the mixing uniformity, compaction degree and water content. In the prior art, tools such as rake teeth, shovels, and small excavators are usually used for manual mixing and paving, or other small machines are used for mixing and paving. However, this method has the following problems:

[0004] First, manual mixing construction has low efficiency, a bad working environment, and uneven mixing, which affects the quality of mud-bound gravel pavement.

[0005] Second: after manual mixing, the mixed mud-bound gravel cannot be paved flat, affecting the overall flatness of the road surface;

[0006] Third, manual mixing is uneven, with excessive mud or crushed stone in some areas. Excessive crushed stone in some areas affects the interlocking effect of crushed stone. Excessive mud in some areas can easily cause local subsidence of the road surface, and the road surface becomes soft and slurry in rainy days.

[0007] Fourth: The mixing + paving method using a small excavator or other small machinery also has problems of low work efficiency and uneven mixing. Utility Model Content

[0008] At least one of the purposes of the invention of the utility model is to provide a road mixing and paving structure and a construction device to address the problems of low mixing efficiency and uneven mixing when mud and crushed stone are mixed manually or with small machines during the construction of mud-bound gravel pavement. The road mixing and paving structure adopts two mixing rods rotating in opposite directions, and the two mixing rods are respectively provided with positive and negative double spiral plates. The rotating structures of the two mixing rods are driven by a power mechanism to rotate and automatically achieve mixing. At the same time, the two mixing rods are provided with walking wheels for mixing and walking on the road surface, which greatly improves the mixing efficiency. Moreover, the mixing rod with a spiral structure can mix evenly, fully ensuring the construction quality of the mud-bound gravel pavement.

[0009] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions.

[0010] A road mixing and paving structure comprises a plurality of mixing rods arranged side by side, wherein two adjacent mixing rods are respectively connected to a transmission mechanism, and the transmission mechanism drives the two adjacent mixing rods to rotate towards each other through a connected power source, and the two adjacent mixing rods are respectively provided with positive and negative double helical plates, and a steel plate guardrail with adjustable height from the ground is provided on the outer side of the mixing rod. The mixing and paving structure also comprises a rolling wheel, and the rolling wheel is fixedly connected to the steel plate guardrail through a connecting rod, and the connecting rod and the rolling wheel are connected by a telescopic rod.

[0011] The road mixing and paving structure of this scheme can achieve the purpose of rapid mixing of mud-bound gravel road surface by driving the forward and reverse double spiral blades to repeatedly and fully mix the crushed stone and soil materials through the rotation of the mixing rod, and the mixing rods rotating in opposite directions can effectively prevent the mixture formed by the crushed stone and soil materials from piling up and squeezing in one direction, and can be fully mixed by the forward and reverse rotation of the spiral blades.

[0012] The telescopic rod installed on the rolling wheel can drive the connecting rod to move up and down, so that the steel plate guardrail fixedly connected to the connecting rod can also move up and down, so as to achieve the purpose of adjusting the height of the steel plate guardrail from the ground, thereby realizing the rapid spreading of the mixed material and the adjustment of the spreading thickness of the mixed material through height adjustment.

[0013] Preferably, the connecting rod includes a transverse connecting rod and a longitudinal connecting rod, the number of the rolling wheels is two, and the two rolling wheels are installed at both ends of the transverse connecting rod through a telescopic rod. One end of the longitudinal connecting rod is fixedly connected to the middle of the transverse connecting rod, and the other end is fixedly connected to the steel plate guardrail and extends outward. The end on one side of the extension is used to connect a device with a driving force, and the transverse connecting rod is arranged parallel to the mixing rod.

[0014] In this way, when the equipment with propulsion force moves the mixing and paving structure, the mixing and paving structure mainly moves along the direction of the longitudinal connecting rod, ensuring that the mixing rod mixes in the moving direction, thereby improving the mixing efficiency; when the equipment with propulsion force moves within the width range of the construction road surface, it can drive the mixing and paving structure to fully mix in the width direction of the road surface, without dead angles, ensuring that all positions on the road surface can be mixed.

[0015] The longitudinal connecting rod is provided with a rotating connecting hole at the end extending out of the steel plate guardrail, which is used to connect to the fixed support frame of the mixing and paving structure. On the one hand, it is moved mainly along the direction of the longitudinal connecting rod through the equipment with driving force. On the other hand, the mixing and paving structure can also be rotated in a local part, avoiding multiple back and forth pushes to achieve the mixing purpose.

[0016] Furthermore, the two rolling wheels are universal wheels.

[0017] Preferably, the steel plate guardrail includes a fence side and a relief side, the fence side includes a first fence fixedly connected to the longitudinal connecting rod, and a second fence and a third fence respectively connected to both sides of the first fence, and the opposite side of the first fence is the relief side.

[0018] The steel plate guardrail is set up as a structure with three sides as fence sides and one side as a vent side. During the moving mixing process of the mixing and paving structure, the crushed stone and mud can completely enter the steel plate guardrail through the vent side, so that the mixing rod in the steel plate guardrail can fully mix the crushed stone and mud. After sufficient mixing, as the mixing and paving structure moves, the fence sides on three sides of the mixing and paving structure will flatten the mixture, greatly improving the construction efficiency.

[0019] Preferably, the depth of the spiral blades is in the range of 50 to 100 mm, and the width of the spiral grooves formed between the spiral blades is in the range of 50 to 80 mm.

[0020] Preferably, the road mixing paving structure is used in the construction process of mud-bound gravel pavement or road pavement base. The road mixing paving structure is not only suitable for mud-bound gravel pavement, but also suitable for the construction process of road pavement base. When the roadbed base is constructed, the road mixing paving structure of this scheme is used to ensure that the pavement base is firm and stable, so that there will be no hollowing or depression when the surface layer is constructed later.

[0021] Correspondingly, the present application also provides a road construction device, which includes a rolling structure, a mixing and paving structure, a sprinkling structure and an air-drying structure. The rolling structure includes a road roller, and the roller of the road roller is rotatably installed on a roller bracket. The air-drying structure includes an air compressor, a connecting pipe and an air-drying pipe. The sprinkling structure includes a water tank, a water supply pipe and a spray pipe. The front end of the roller bracket is connected to a support rod, and the air-drying pipe and the spray pipe are sequentially installed on the side of the support rod away from the road roller, and the longitudinal connecting rod of the mixing and paving structure is connected to the end of the support rod away from the side, the air compressor and the water tank are installed on the road roller frame, the air-drying pipe includes a plurality of air outlet nozzles connected to the cavity in the air-drying pipe, and both ends of the connecting pipe are connected to the air outlet of the air compressor and the cavity in the air-drying pipe, so that the air outlet nozzle blows air to dry the road surface, and the spray pipe includes a plurality of spray nozzles connected to the inner cavity of the spray pipe, and both ends of the water supply pipe are connected to the water outlet of the water tank and the inner cavity of the spray pipe.

[0022] The road construction device of this scheme integrates the rolling structure, mixing and paving structure, watering structure and air-drying structure at the same time. The mixing and paving structure is set at the front end for mixing and paving gravel and mud. At the same time, a road roller is used as a rolling structure for rolling to ensure that the mixed material is fully bonded. After the road surface is rolled firmly and stably, the mixing and paving structure is raised by telescopic rods for rolling. After the initial rolling is completed, the watering structure and air-drying structure are turned on. The watering structure sprinkles water on the road surface after the initial rolling to moisten it, and then the road surface is roughly air-dried by the air-drying structure, and the final rolling is completed by the rolling structure. It is worth noting that after the final rolling of this construction device, the watering structure, air-drying structure and rolling structure work simultaneously, and the construction device rolls in the direction of one side of the mixing and paving structure. This direction ensures that the rolled road surface is a road surface that has been air-dried on the surface by the air-drying structure.

[0023] Preferably, 3-5 spray nozzles are arranged along the length direction of the spray pipe, and the outlets of the plurality of spray nozzles face upward.

[0024] Multiple spray nozzles are set to spray upward into the air so that the mist is dispersed in the construction area, ensuring that the road surface in the construction area is wetted by water and achieving the purpose of sufficient infiltration.

[0025] Preferably, 5-8 spray nozzles are arranged on the air drying pipe, and a plurality of the air outlet nozzles are arranged toward the road surface. The air outlet nozzles are arranged downward toward the road surface, so that during the construction process, the construction device can concentrate on air drying and rolling the road surface to be rolled, thereby improving the rolling compaction degree and preventing the roller from adhering to mud and affecting the road surface quality.

[0026] Preferably, the spray pipe and the air-drying pipe are arranged parallel to the axial direction of the drum, and the lengths of the spray pipe and the air-drying pipe correspond to the length of the drum.

[0027] The spray pipe and air-drying pipe are set to a length corresponding to the length of the roller, so that after watering and air-drying, the roller can complete the rolling at the same time. The final rolling is achieved after repeated rolling by the rolling structure, which improves the bonding effect between clay and gravel and ensures the construction quality of mud-bound gravel pavement.

[0028] Preferably, the road construction device is used for mixing, paving and rolling construction of mud-bound gravel pavement, the mud-bound gravel pavement includes crushed stone and mud, the crushed stone is crushed stone with a single size range of 5-20 mm, and the mud is clay with a plasticity index greater than 17.

[0029] When mixing and paving gravel and clay with a particle size of 5-20mm, conventional small machines cannot mix them evenly, and the construction efficiency is low if manual mixing is used. The road construction device of this technical solution is used for mixing and paving, which can ensure uniform mixing and smooth paving, with high construction efficiency. At the same time, the compaction is dense and stable. The above working conditions are very suitable for the road construction device of this solution.

[0030] In summary, due to the adoption of the above technical solution, this technical solution has at least the following beneficial effects:

[0031] 1. The road mixing and paving structure of this scheme can achieve the purpose of rapid mixing of mud-bound gravel road surface by driving the forward and reverse double spiral blades to repeatedly and fully mix the crushed stone and soil materials through the rotation of the mixing rod. The mixing rods rotating in opposite directions can effectively prevent the mixture formed by the crushed stone and soil materials from piling up and squeezing in one direction, and can be fully mixed by the forward and reverse rotation of the spiral blades;

[0032] 2. The telescopic rod installed on the rolling wheel can drive the connecting rod to move up and down, so that the steel plate guardrail fixedly connected to the connecting rod can also move up and down, so as to achieve the purpose of adjusting the height of the steel plate guardrail from the ground, thereby realizing the rapid spreading of the mixed material, and adjusting the spreading thickness of the mixed material through height adjustment;

[0033] 3. The steel plate guardrail is set to have three fence sides and one empty side, so that during the mixing and paving structure moving process, the crushed stone and mud can completely enter the steel plate guardrail through the empty side, so that the mixing rod in the steel plate guardrail can fully mix the crushed stone and mud. After fully mixing, as the mixing and paving structure moves, the fence sides on the three sides of the mixing and paving structure pave the mixed materials flat, greatly improving the construction efficiency;

[0034] 4. The road construction device of this technical solution integrates the rolling structure, mixing and paving structure, watering structure and air-drying structure at the same time. The mixing and paving structure is set at the front end for mixing and paving gravel and mud. At the same time, a road roller is used as a rolling structure for rolling to ensure that the mixed material is fully bonded. After the road surface is rolled firmly and stably, the mixing and paving structure is lifted by telescopic rods for rolling. After the initial rolling is completed, the watering structure and air-drying structure are turned on. The watering structure sprinkles water on the road surface after the initial rolling to moisten it, and then the road surface is roughly air-dried by the air-drying structure, and the final rolling is completed by the rolling structure. It is worth noting that after the final rolling of this construction device, the watering structure, air-drying structure and rolling structure work simultaneously, and the construction device rolls in the direction of one side of the mixing and paving structure. This direction ensures that the rolled road surface is a road surface that has been air-dried on the surface by the air-drying structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the road mixing and paving structure of the utility model.

[0036] Figure 2 It is a schematic diagram of the lateral structure of the road mixing and paving construction device of the utility model.

[0037] Figure 3 It is a schematic diagram of the top view of the structure of the road mixing and paving construction device of the utility model.

[0038] Figure 4 It is a structural schematic diagram of another embodiment of the road mixing and paving construction device of the utility model.

[0039] Figure 5 It is a schematic diagram of the turning of the first mixing rod of the transmission mechanism of the construction device of the utility model toward the second fence direction.

[0040] Figure 6 It is a schematic diagram of the turning of the second mixing rod of the transmission mechanism of the construction device of the utility model toward the second fence direction.

[0041] Figure 7 This is a process flow chart of the construction method for mud-bound gravel pavement in Example 3.

[0042] Symbols in the figure: 1-mixing and paving structure, 101-mixing rod, 1011-first mixing rod, 1012-second mixing rod, 101a-spiral blade, 102-transmission mechanism, 102a-large pulley, 102b-rotating shaft, 102c-small pulley, 102d-belt, 103-power source, 104-steel plate guardrail, 104´-fence side, 1041-first fence, 1042-second fence, 1043-third fence, 104´´-emptying side, 105-rolling wheel, 106-connecting rod, 106a-longitudinal connecting rod, 106a 1-installing pin hole, 106b-lateral connecting rod, 107-telescopic rod 06a, 108-steering gear set, 1081-first gear, 1082-second gear, 109 reducer, 2-rolling structure, 21-road roller, 22-roller, 23-roller bracket, 3-sprinkler structure, 31-water reservoir, 32-water supply pipe, 33-spray pipe, 331-spray nozzle, 4-air drying structure, 41-air compressor, 42-connecting pipe, 43-air drying pipe, 431-air outlet nozzle, 5-support rod, 51-support cross rod, 52-support longitudinal rod, 6-bearing. DETAILED DESCRIPTION

[0043] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments to make the purpose, technical solutions and advantages of the present invention more clearly understood. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Example

[0044] This embodiment provides a road mixing paving structure for use in the construction of mud-bound gravel pavement or pavement base, such as Figure 1As shown, the mixing and paving structure 1 includes two mixing rods 101 arranged side by side, and the two adjacent mixing rods 101 are respectively connected to a transmission mechanism 102. The transmission mechanism 102 drives the two adjacent mixing rods 101 to rotate toward each other through a connected power source 103. The power source 103 adopts a high-power motor, and a diesel engine or the like can also be used as a power source to provide rotational power for the mixing rods 101. The two adjacent mixing rods 101 are respectively provided with positive and negative double helical plates 101a. The outer side of the mixing rod 101 is provided with a steel plate guardrail 104 with an adjustable height from the ground. The mixing and paving structure 1 also includes a rolling wheel 105. The rolling wheel 105 is fixedly connected to the steel plate guardrail 104 through a connecting rod 106, and the connecting rod 106 and the rolling wheel 105 are connected by a telescopic rod 107. The transmission mechanism 102 includes a large pulley 102a fixedly connected to the mixing rod 101, and also includes a rotating shaft 102b driven by a high-power motor, and a small pulley 102c fixedly installed on the rotating shaft 102b. The power of the high-power motor is at least 20KW, and it is connected to the transmission shaft 102b through a reducer 109. The large pulley 102a and the small pulley 102c are connected through a belt 102d.

[0045] As for the number of mixing rods 101, two can be provided, or two groups of four can be provided. An even number of mixing rods is preferred, so that two mixing rods can be provided as a group, and the two mixing rods can rotate towards each other, thereby improving the mixing efficiency and mixing quality.

[0046] The connecting rod 106 includes a transverse connecting rod 106b and a longitudinal connecting rod 106a. There are two rolling wheels 105. The two rolling wheels 105 are installed at both ends of the transverse connecting rod 106b through a telescopic rod 107, and serve as a walking device for the mixing and paving structure 1 on the construction road surface. One end of the longitudinal connecting rod 106a is fixedly connected to the middle of the transverse connecting rod 106b, and the other end is fixedly connected to the steel plate guardrail 104 and extends outward. The end of the extended side is provided with a mounting pin hole 106a1 for connecting a device with a driving force. The transverse connecting rod 106b is arranged in parallel with the mixing rod 101. The steel plate guardrail 104 includes a fence side 104´ and a venting side 104´. The fence side 104´ includes a first fence 1041 fixedly connected to the longitudinal connecting rod 106a, and a second fence 1042 and a third fence 1043 respectively connected to both sides of the first fence 1041. The opposite side of the first fence 1041 is the venting side 104´ ´, the two ends of the two mixing rods 101 pass through the second fence 1042 and the third fence 1043 of the steel plate guardrail 104 respectively, and rolling bearings are arranged at the passing parts, so that the two mixing rods 101 are supported and fixed by the rolling bearings installed on the second fence 1042 and the third fence 1043, and the rotating shaft 102b is installed on the outer wall of the first fence 1041 through the bearing support, and the high-power motor and reducer 109 are also installed on the outer wall of the first fence 1041 through the bracket. By setting the steel plate guardrail 104 to a structural form with three sides as fence sides and one side as a vent side 104'', during the moving mixing process of the mixing and paving structure, the crushed stone and mud can completely enter the steel plate guardrail 104 through the vent side 104'', so that the mixing rod 101 in the steel plate guardrail 104 can fully mix the crushed stone and mud. After sufficient mixing, as the mixing and paving structure moves, the fence sides on three sides of the mixing and paving structure pave the mixture flat, greatly improving the construction efficiency.

[0047] The longitudinal connecting rod 106a is connected to the equipment with a driving force through the mounting pin hole 106a1. The connecting component also adopts a retractable part, so that the mixing and paving structure can be adjusted in height. One side is connected to the equipment with a driving force through a retractable part to achieve up and down adjustment, and the other side is connected to the retractable rod 107 of the roller 105 to achieve up and down adjustment. Since the roller 105 and the equipment with a driving force are supported on the road surface, the height of the steel plate guardrail from the ground can be adjusted up and down through the up and down adjustment of the mixing and paving structure, thereby achieving rapid spreading of the mixture and adjusting the thickness of the mixture through height adjustment.

[0048] The device with driving force can be a bulldozer, an excavator, a roller, or a manual cart. When the longitudinal connecting rod 106a is connected to the roller through the mounting pin hole 106a1, refer to Example 2.

[0049] The two mixing rods 101 are respectively connected in an integral manner with forward and reverse double helical blades 101a, the depth of the helical blades 101a is between 50 and 100 mm, and the width of the spiral grooves formed between the helical blades 101a is between 50 and 80 mm. Through the mixing and paving structure 1 of this embodiment, the mixing rod 101 is rotated to drive the forward and reverse double helical blades 101a to repeatedly and fully mix the crushed stone and soil materials, so as to achieve the purpose of rapid mixing of mud-bound crushed stone pavement. The mixing rods rotating in opposite directions can effectively prevent the mixture formed by the crushed stone and soil materials from piling up and squeezing in one direction, and the forward and reverse rotation of the helical blades can achieve full mixing;

[0050] The longitudinal connecting rod 106a is fixedly connected to the first fence 1041, so that when the equipment with a driving force moves the mixing and paving structure 1, the mixing and paving structure 1 mainly moves along the direction of the longitudinal connecting rod 106a, ensuring that the mixing rod 101 mixes in the moving direction, thereby improving the mixing efficiency. When the equipment with a driving force moves within a width range of the construction road surface, it can drive the mixing and paving structure to fully mix in the width direction of the road surface, without dead angles, ensuring that all positions on the road surface can be mixed.

[0051] In order to satisfy the requirement that two adjacent mixing rods 101 rotate towards each other, Figure 3 , Figure 5 and Figure 6As shown in the figure, the two mixing rods are marked as the first mixing rod 1011 and the second mixing rod 1012. The first mixing rod 1011 faces the first fence direction, and the second mixing rod 1012 faces the second fence direction. The rotating shaft 102b is driven to rotate by a high-power motor and a reducer 109. For the first mixing rod 1011, a small pulley 102c fixed on the rotating shaft 102b drives the large pulley 102a through a belt 102d, and the two rotate in the same direction, which is clockwise. At the other end of the rotating shaft 102b, a steering gear set 108 is provided, including a first gear 1081 fixed on the rotating shaft 102b, and a second gear 1082 meshing with the first gear 1081. The second gear 1082 is installed on a steel plate. The rotating bearing support and installation on the plate guardrail, the rotating shaft 102b is uniformly turned, and rotates counterclockwise facing the direction of the third fence, driving the first gear 1081 fixed on the rotating shaft 102b to rotate counterclockwise, and the meshing second gear 1082 rotates clockwise, and the small pulley 102c coaxially fixedly connected to the second gear 1082 rotates clockwise, and the second mixing rod 1012 and the large pulley 102a driven by the belt 102d rotate in the same direction, which is clockwise, to achieve the two mixing rods 101 (the first mixing rod 1011 and the second mixing rod 1012) rotating in opposite directions; other implementation methods can also separately set the reducer 109 and the rotating shaft, so that the second mixing rod 1012 and the first mixing rod 1011 rotate in opposite directions. Example

[0052] This embodiment provides a road construction device, which can simultaneously realize the mixing, paving and rolling process of mud-bound gravel road surface or road surface base, reducing the construction process steps and saving a lot of construction time. Figure 2 and Figure 3As shown, the road construction device of this embodiment mainly includes a rolling structure 2, a mixing and paving structure 1, a watering structure 3 and an air-drying structure 4. The rolling structure 2 includes a roller 21, and the roller 22 of the roller 21 is rollingly installed on a roller bracket 23. The air-drying structure 4 includes an air compressor 41, a connecting pipe 42 and an air-drying pipe 43. The watering structure 3 includes a water storage tank 31, a water supply pipe 32 and a spray pipe 33. The front end of the roller bracket 23 is connected to a support rod 5, and the support rod 5 is away from the roller 2. 1, an air drying pipe 43 and a spray pipe 33 are sequentially installed on one side of the support rod 1, and the end of the support rod 1 away from the roller 21 is connected to the longitudinal connecting rod 106a of the mixing and paving structure 1 through a telescopic rod 107. The support rod 5 is formed by welding double rows of steel sections. The air compressor 41 and the water storage tank 31 are installed on both sides of the frame 14 of the roller 21. The air drying pipe 43 is provided with a plurality of air outlet nozzles 431 connected with the cavity in the air drying pipe. The plurality of air outlet nozzles 431 are arranged in the direction of the road surface. The connecting pipe 4 The two ends of the water supply pipe 32 are connected to the air outlet of the air compressor 41 and the cavity in the air drying pipe, so that the air outlet nozzle 431 blows air to dry the road surface. The spray pipe 33 is provided with a plurality of spray nozzles 331 connected to the inner cavity of the spray pipe, and the outlets of the plurality of spray nozzles 331 face upward. The two ends of the water supply pipe 32 are connected to the water outlet of the water storage tank 31 and the inner cavity of the spray pipe, so that the spray nozzles 331 spray upward to moisten the road surface. The spray pipe 33 and the air drying pipe 43 are arranged parallel to the axial direction of the drum 22. The spray pipe 33 is provided with a plurality of spray nozzles 331 connected to the inner cavity of the spray pipe, and the outlets of the plurality of spray nozzles 331 face upward. The length of the spray pipe 33 and the air drying pipe 43 corresponds to the length of the roller 22, 3-5 spray nozzles 331 are arranged along the length direction of the spray pipe 33, and 5-8 spray nozzles 431 are arranged on the air drying pipe 43. The spray pipe 33 and the air drying pipe 43 are set to a length corresponding to the length of the roller 22, so that after the spray is air-dried, the roller 22 can complete the rolling at the same time, and the final rolling is achieved after repeated rolling by the rolling structure 2, thereby improving the bonding effect between the clay and the crushed stone, and ensuring the construction quality of the mud-bound crushed stone road surface.

[0053] The road construction device of this scheme integrates a rolling structure 2, a mixing and paving structure 1, a watering structure 3 and an air-drying structure 4 at the same time. The mixing and paving structure 1 is arranged at the front end for mixing and paving gravel and mud. At the same time, a road roller 21 is used as a rolling structure for rolling to ensure that the mixed material is fully bonded. After the road surface is rolled firmly and stably, the mixing and paving structure 1 is lifted by the telescopic rod 107 for rolling. After the initial rolling is completed, the watering structure 3 and the air-drying structure 4 are turned on. The watering structure 3 sprays water on the road surface after the initial rolling to moisten it, and then the road surface is roughly air-dried by the air-drying structure 4, and the final rolling is completed by the rolling structure 2. It is worth noting that after the final rolling of the construction device, the watering structure 3, the air-drying structure 4 and the rolling structure 2 work simultaneously, and the construction device rolls in the direction toward one side of the mixing and paving structure 1. The construction rolling is carried out in this direction to ensure that the rolled road surface is the road surface that has been air-dried by the air-drying structure 4.

[0054] The road surface is sprayed and moistened by the watering structure 3 to make it moist and soft. At the same time, after the air-drying structure is set, the road surface is air-dried to prevent the road mixture from sticking to the roller. This not only improves the compaction degree of the road surface, but also prevents the road surface from sticking to the roller. Moreover, it can be carried out in the same construction process, which greatly improves the construction efficiency and quality.

[0055] There are two ways to install the mixing and paving structure 1 in the road construction device of this embodiment:

[0056] First, if Figure 2 and Figure 3 As shown, the support rod 5 connected to the front end of the roller bracket 23 is formed by welding steel sections arranged side by side, and a support cross bar 51 is welded between the support rods 5. The top of the support cross bar 51 is fixedly connected to the telescopic rod 107, and the longitudinal connecting rod 106a of the mixing and paving structure 1 is connected to the top of the telescopic rod 107. A support longitudinal rod 52 is also welded to the bottom of the support cross bar 51, and the support longitudinal rod 52 extends to the bottom of the mixing rod 101. Support longitudinal rods 52 are arranged on the outside of the second fence 1042 and the third fence 1043. Both ends of the first mixing rod 1011 and the second mixing rod 1012 are mounted on the support longitudinal rod 52 through bearing supports. The steering gear set 108 is also mounted on the support structure extending from the support cross bar 51. The rotating shaft 102b is mounted through bearing supports. On the supporting cross bar 51, the power source 103 and the reducer 10 are installed on the supporting cross bar 51 through a bracket. At this time, the connecting rod 106 of the mixing and paving structure 1 is fixedly connected to the steel plate guardrail 104. The transmission mechanism and power source and other auxiliary components for driving the mixing rod 101 are fixedly installed on the supporting cross bar 51 and the supporting longitudinal rod 52 connected to the support rod 5. When adjusting the height of the steel plate guardrail 104, the height adjustment of the connecting rod 106 and the steel plate guardrail 104 is achieved through the telescopic rods 107 at both ends of the connecting rod 106. At this time, since the mixing rod 101 passes through the steel plate guardrail 104, in order to smoothly realize the up and down movement adjustment of the steel plate guardrail 104, up and down grooves are opened at the position where the mixing rod 101 passes through the steel plate guardrail 104 to avoid interference when the steel plate guardrail 104 moves.

[0057] Second: If Figure 1 and 4As shown, the mixing and paving structure 1 in Example 1 is adopted. At this time, the connecting rod 106 of the mixing and paving structure 1 is fixedly connected to the steel plate guardrail 104, and the transmission mechanism, power source 103, reducer 109 and other auxiliary components for driving the mixing rod 101 are all fixedly installed on the steel plate guardrail 104. When the height of the steel plate guardrail 104 is adjusted, the overall height of the mixing and paving structure 1 including the transmission mechanism, power source 103, reducer 109 and other auxiliary components is adjusted through the telescopic rods 107 at both ends of the connecting rod 106. Example

[0058] This embodiment provides a construction method for a mud-bound gravel road surface, such as Figure 7 As shown, when the construction device for mud-bound gravel pavement in Example 2 is used for construction, the following construction steps are included:

[0059] Step A: Determine the proportion of mud and crushed stone through preliminary experiments and performance tests;

[0060] Step B: Determine the construction length of the road section and calculate the amount of mud and crushed stone according to the construction length;

[0061] Step C: transporting and spreading the crushed stone on the roadbed or road trench, and transporting and spreading the mud on the crushed stone;

[0062] Step D: The mud and crushed stone are mixed and leveled by the mixing and paving structure of the construction device, and the mixed and leveled mixture is preliminarily compacted by the rolling structure;

[0063] Step E: Turn on the watering structure of the construction device and air-dry the surface through the air-drying structure. After the surface is initially air-dried to a humidity level of 10% to 30%, it is repeatedly rolled through the rolling structure to make the pavement compaction coefficient reach between 1.1 and 1.5. During the repeated rolling process, the rolling structure rolls toward the side of the mixing and paving structure.

[0064] By adopting the construction device for mud-bound gravel pavement in the present scheme and the construction steps of the present scheme in the construction process of mud-bound gravel pavement, on the one hand, the inefficiency problem of manual construction is solved, and on the other hand, the construction process is greatly reduced, avoiding the problem of separate steps of spreading, leveling, rolling, sprinkling water, and air drying in the prior art. The construction process can be completed in one go, and repeated rolling by the rolling structure can improve the bonding effect between clay and gravel, thereby ensuring the construction quality of the mud-bound gravel pavement.

[0065] As one of the preferred implementation modes, in step A, the crushed stone material adopts a single range size crushed stone material with a particle size of 5-20 mm, the mud material adopts clay with a plasticity index greater than 17, the mixing ratio of crushed stone material and clay is between 1:4 and 3:8, and through experiments and performance tests, it is finally determined that the mixing ratio of clay material and crushed stone material is 1:3. The selection of crushed stone material with a particle size of 5-20 mm and clay with a plasticity index greater than 17 can further improve the strength and stability of the mud-bound crushed stone pavement, ensure that the pavement crushed stone material formed by the construction has a good interlocking effect, and the single range When crushed stones of different sizes are mixed, the normal construction process of the construction equipment can be avoided to be affected by the large difference in crushed stone particle size, ensuring that the mixing, paving and rolling processes are carried out smoothly and efficiently, and further ensuring the strength and stability of the road surface. The preferred mix ratio of crushed stone and clay is between 1:4 and 3:8, and it is further determined to use 1:3 mud and crushed stone. Test data and practice have proved that mud-bound gravel pavement will not have the problem of dispersion leading to the separation of crushed stone and mud, and will not have the problem of softening and sinking to form mud under the condition of continuous rainy days, and the road surface integrity effect is better.

[0066] The thickness of the mud-bound gravel pavement is preferably set to between 10 and 28 cm. Within this thickness range, in the step D, the mixture is paved and rolled in two layers. The lower layer is first laid with a thickness of between 7 and 18 cm. After the initial rolling, the upper layer is laid with a thickness of between 3 and 10 cm. Since the mechanical strength and stability of the mud-bound gravel pavement not only depend on the mutual interlocking effect of the gravel, but also on the bonding effect of the soil, the two-layer paving and rolling method can further enhance the bonding effect between the clay and the gravel, and ensure that the ground mixture is fully bonded. The double-layer paving and rolling method, combined with the final watering, air-drying and rolling step of step E, can further crush the gravel into stone chips, so that the mud-bound gravel pavement is transformed into a dense gradation, and after the road is put into operation, the mud-bound gravel pavement will become denser, ensuring that the pavement is strong and durable.

[0067] In step E, the rolling structure rolls toward one side of the mixing and paving structure, so that the road surface after being watered by the watering structure is air-dried by the air-drying structure, thereby achieving the purpose of repeated rolling after being roughly air-dried.

[0068] The above is only a detailed description of the specific implementation of the present invention, rather than a limitation of the present invention. Various substitutions, modifications and improvements made by those skilled in the relevant art without departing from the principle and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A road mixing and paving structure, characterized in that: The mixing and paving structure (1) comprises a plurality of mixing rods (101) arranged side by side, two adjacent mixing rods (101) are respectively connected to a transmission mechanism (102), the transmission mechanism (102) drives the two adjacent mixing rods (101) to rotate towards each other through a connected power source (103), the two adjacent mixing rods (101) are respectively provided with positive and negative double helical plates (101a), the outer sides of the mixing rods (101) are provided with steel plate guardrails (104) whose height above the ground is adjustable, and the mixing and paving structure (1) further comprises a rolling wheel (105), the rolling wheel (105) is fixedly connected to the steel plate guardrail (104) via a connecting rod (106), and the connecting rod (106) and the rolling wheel (105) are connected via a telescopic rod (107).

2. The road mixing paving structure according to claim 1, characterized in that: The connecting rod (106) comprises a longitudinal connecting rod (106a) and a transverse connecting rod (106b). The number of the rolling wheels (105) is two. The two rolling wheels (105) are installed at both ends of the transverse connecting rod (106b) through a telescopic rod (107). One end of the longitudinal connecting rod (106a) is fixedly connected to the middle of the transverse connecting rod (106b), and the other end is fixedly connected to the steel plate guardrail (104) and extends outward. The end of the extended side is used to connect a device with a driving force. The transverse connecting rod (106b) is arranged in parallel with the mixing rod (101).

3. The road mixing paving structure according to claim 1, characterized in that: The steel plate guardrail (104) comprises a fence side (104´) and a vent side (104´´), wherein the fence side (104´´) comprises a first fence (1041) fixedly connected to a longitudinal connecting rod (106a), and a second fence (1042) and a third fence (1043) respectively connected to both sides of the first fence (1041), and the opposite side of the first fence (1041) is the vent side (104´´).

4. The road mixing paving structure according to any one of claims 1 to 3, characterized in that: The depth of the spiral blades (101a) ranges from 50 to 100 mm, and the width of the spiral grooves formed between the spiral blades (101a) ranges from 50 to 80 mm.

5. The road mixing paving structure according to claim 1, characterized in that: The road mixing paving structure is used in mud-bound gravel pavement or road pavement base construction conditions.

6. A road construction device, characterized in that: The construction device comprises a mixing and paving structure (1) as claimed in any one of claims 1 to 5, as well as a rolling structure (2), a watering structure (3) and an air-drying structure (4), wherein the rolling structure (2) comprises a road roller (21), a roller (22) of the road roller (21) being rollably mounted on a roller bracket (23), the air-drying structure (4) comprises an air compressor (41), a connecting pipe (42) and an air-drying pipe (43), the watering structure (3) comprises a water reservoir (31), a water supply pipe (32) and a spray pipe (33), the front end of the roller bracket (23) is connected to a support rod (5), and the air-drying pipe (33) is sequentially mounted on the side of the support rod (5) away from the road roller (21). 43) and a spray pipe (33), and the longitudinal connecting rod (106a) of the mixing and paving structure (1) is connected to the end of the supporting rod (5) on the side away from the supporting rod (5), the air compressor (41) and the water storage tank (31) are installed on the roller frame, the air dry pipe (43) is provided with a plurality of air outlet nozzles (431) connected to the cavity in the air dry pipe, the two ends of the connecting pipe (42) are connected to the air outlet of the air compressor and the cavity in the air dry pipe, so that the air outlet nozzle (431) blows air to dry the road surface, the spray pipe (33) is provided with a plurality of spray nozzles (331) connected to the inner cavity of the spray pipe, and the two ends of the water supply pipe (32) are connected to the water outlet of the water storage tank and the inner cavity of the spray pipe.

7. The road construction device according to claim 6, characterized in that: 3 to 5 spray nozzles (331) are arranged along the length direction of the spray pipe (33), and the outlets of the plurality of spray nozzles (331) face upward.

8. The road construction device according to claim 6, characterized in that: The air drying pipe (43) is provided with 5 to 8 air outlet nozzles (431), and the plurality of air outlet nozzles (431) are arranged toward the road surface.

9. The road construction device according to claim 6, characterized in that: The spray pipe (33) and the air drying pipe (43) are arranged parallel to the axial direction of the drum (22), and the lengths of the spray pipe (33) and the air drying pipe (43) correspond to the length of the drum (22).

10. The road construction device according to claim 6, characterized in that: The road construction device is used for mixing, paving and rolling construction of mud-bound gravel road surfaces. The mud-bound gravel road surface includes crushed stone and mud. The crushed stone is crushed stone with a single size range of 5-20 mm, and the mud is clay with a plasticity index greater than 17.

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