Construction method and construction device for polyurethane mixture pavement

Abstract

The invention relates to the technical field of pavement construction, in particular to a polyurethane mixture pavement construction method and a polyurethane mixture pavement construction device.The polyurethane mixture pavement construction device comprises a material conveying box, the middle of a discharging box communicates with the material conveying box, and the lower side of the discharging box is arranged to be an inverted splayed discharging opening; splicing shafts are rotationally mounted in inner cavities of the adjusting boxes, and inserting rods matched with the inserting holes are fixed to the surfaces of the polygonal inserting blocks. A steel wire rope penetrates through the middle part of the winding turntable; the device has the beneficial effects that the outer sides of the two ends of the discharging box are slidably sleeved with adjusting boxes, splicing shafts and second auger blades are rotationally installed in inner cavities of the adjusting boxes, polygonal insertion blocks and insertion rods are fixed to one ends of the splicing shafts, and splicing and fixing between the splicing shafts and the main rotating shaft are ensured by replacing the splicing shafts with different lengths and sizes and sliding the adjusting boxes; therefore, the overall length of the device can be adjusted, it is ensured that the device has a larger application range, and corresponding adjustment can be conducted according to actual on-site requirements.

Description

Technical Field

[0001] The invention relates to the technical field of pavement construction, in particular to a polyurethane mixture pavement construction method and a construction device. Background Art

[0002] Polyurethane floor materials are gradually replacing ordinary floors due to their excellent performance, solving the shortcomings of ordinary floors such as easy cracking, environmental pollution, poor wear resistance, and low anti-slip coefficient. They are more wear-resistant, environmentally friendly, and flexible than ordinary floors.

[0003] A Chinese invention with publication number CN118668548A discloses a high-performance polyurethane mixture pavement structure and a construction method thereof, which mainly utilizes a paver to continuously pave the polyurethane mixture.

[0004] However, at present, the existing paver has a fixed size of feeding equipment, and the paver can only transport and pave materials on roads of corresponding widths. Its application scope is relatively limited, and it is difficult to adjust it according to actual needs on site. To this end, the present invention proposes a polyurethane mixture pavement construction method and construction device to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a polyurethane mixture pavement construction method and construction device to solve the problem that the polyurethane mixture paver mentioned in the above background technology has a limited application range and is difficult to adjust accordingly according to on-site needs.

[0006] To achieve the above object, the present invention provides the following technical solution: a polyurethane mixture pavement construction device, comprising:

[0007] A feed box, one end of which is fixedly connected to a feed box, the middle of which is in communication with the feed box, the lower side of which is provided with an inverted "eight"-shaped feed opening, a main shaft being rotatably mounted in the inner cavity of the feed box, splicing disks being fixedly mounted at both ends of the main shaft, a polygonal slot being provided on the surface of the splicing disk, and a plug-in hole being provided at the bottom of the polygonal slot;

[0008] An adjusting box, wherein two adjusting boxes are provided and are respectively slidably sleeved on the outer sides of the two ends of the feeding box, a splicing shaft is rotatably installed in the inner cavity of the adjusting box, a polygonal plug block matching the polygonal slot is fixed at one end of the splicing shaft, and a plug rod matching the plug hole is fixed on the surface of the polygonal plug block;

[0009] The winding turntable is rotatably mounted on the middle part of the surface of the unloading box, a steel wire rope is passed through the middle part of the winding turntable, and two ends of the steel wire rope are respectively fixedly connected to two adjustment boxes.

[0010] Preferably, both ends of the outer side of the main shaft are provided with auger blades 1, and the two auger blades 1 have opposite rotation directions, and the outer side of the splicing shaft is provided with auger blade 2, and the rotation direction of auger blade 2 is the same as that of auger blade 1 at the corresponding position.

[0011] Preferably, an annular receiving groove is provided on the surface of the winding turntable, a clamping stud is threadedly inserted into the bottom of the groove, and one end of the clamping stud is pressed on the surface of the wire rope, a connecting shaft is fixedly provided in the middle of the winding turntable, and the connecting shaft is rotatably mounted on the surface of the discharge box through a bearing.

[0012] Preferably, a torsion spring is sleeved on the outer side of the connecting shaft, and two ends of the torsion spring are respectively fixed to the surface of the winding turntable and the surface of the discharge box.

[0013] Preferably, both ends of the wire rope are fixedly connected with a ring, the surface of the adjustment box is provided with a columnar protrusion and is movably inserted in the inner cavity of the ring, a limiting cover plate is provided on one side of the ring, a fastening stud is fixed on the surface of the limiting cover plate, and the fastening stud is threadedly inserted in the middle part of the columnar protrusion.

[0014] Preferably, a mounting frame is fixed on the inner wall of the material discharge box for the main rotating shaft to movably pass through and connect, and arc-shaped baffles are arranged on both sides below the main rotating shaft. There are two arc-shaped baffles which are respectively fixed on the inner walls on both sides of the material discharge box. The arc-shaped baffles are arc-shaped and concentric with the main rotating shaft, and the two arc-shaped baffles are symmetrically distributed with a gap left therebetween.

[0015] Preferably, the top surface of the adjustment box is provided with positioning studs through threads, and the top surfaces at both ends of the discharge box are provided with multiple adjustment positioning holes linearly distributed at equal intervals along the length direction of the discharge box, and the lower end of the positioning stud is inserted into the inner cavity of the adjustment positioning hole.

[0016] Preferably, a baffle is fixed to the lower side of the regulating box, the baffle is perpendicular to the length direction of the regulating box and abuts against the lower edge of the feed opening, and a sleeve concentric with the outer movable sleeve of the baffle is provided.

[0017] Preferably, a bearing seat is provided on the outer movable sleeve of the other end of the splicing shaft, a sealed bearing is arranged between the bearing seat and the other end of the splicing shaft, a positioning frame is fixed on the inner wall of the end of the regulating box away from the discharge box, and the bearing seat is inserted into the inner cavity of the positioning frame and adapted thereto.

[0018] A construction method according to the above-mentioned polyurethane mixture pavement construction device specifically comprises the following steps:

[0019] Step 1: Construction preparation: After the construction of the curbstones on both sides is completed, the asphalt bottom surface layer is cleaned, the rainwater grate is initially fixed, and the stress absorption layer is inspected and accepted every 10 meters corresponding to the polyurethane mixture pavement elevation along the mileage direction, and relevant equipment and tools are prepared;

[0020] Step 2: Material mixing and transportation. The polyurethane mixture is mixed with an asphalt concrete intermittent mixer. The order of adding materials during mixing is: coarse and fine aggregates → delay 2s → polyurethane adhesive → mixing for 25s. When discharging materials from the mixer to the material transport vehicle, the multiple unloading method is adopted, starting from the rear half of the vehicle and loading forward, and the material transport vehicle delivers it to the designated location;

[0021] Step three, paving. Before paving, adjust the overall length of the discharge box and the adjustment box according to the width of the on-site road surface: release the relative fixation between the adjustment box and the discharge box by loosening the positioning studs, slide the adjustment box until the adjustment box and the discharge box are completely separated, replace the splicing shaft of the inner cavity of the adjustment box, and re-set the adjustment box on the outside of the discharge box. The torsion force of the torsion spring and the manual operation can easily slide the two adjustment boxes close to each other until the plug-in rod and the polygonal plug-in block are respectively plugged into the plug-in hole and the inner cavity of the polygonal slot, tighten the positioning studs to fix the adjustment box and the discharge box relatively, and then the conveying assembly in the feed box conveys the polyurethane mixture unloaded by the material transport vehicle to the middle of the inner cavity of the discharge box, and the auger blades one and two cooperate to evenly convey the polyurethane mixture to various positions of the inner cavity of the discharge box and the adjustment box. The polyurethane mixture falls to the ground in a uniform straight line under the action of gravity, and is evenly paved on the road surface as the material transport vehicle moves;

[0022] Step 4: Compacting: Use two 12t double steel wheel rollers to roll twice for initial compaction, one 26t rubber wheel roller to roll twice for recompacting, and one 12t double steel wheel roller to roll once for final compaction. For the parts that are difficult to roll, use a small vibrating roller for additional compaction.

[0023] Step 5: Joint treatment and maintenance. Before construction, use a small milling machine to mill off the loose parts of the longitudinal joints, clean the joints manually, use a 3m ruler to check the flatness of the ends of the transverse joints, cut off all the mixtures that do not meet the requirements of end flatness with a pavement cutter, clean the joints, and when spreading the SBS modified asphalt tack coat, also spread asphalt on the cross-section of the joints. Use a 3t small double-steel wheel roller for static rolling at the joints. First, roll the new paved layer about 150mm over the formed road surface, stagger the joints by 150mm each time, until the roller rolls all the way to the new road. Close traffic and prohibit pedestrians and vehicles from entering before the polyurethane surface layer is completely solidified after rolling. The maintenance time is 1 to 3 days.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention has adjustment boxes slidingly sleeved on the outer sides of both ends of the material discharge box, and a splicing shaft and auger blade 2 are rotatably installed in the inner cavity of the adjustment box. A polygonal plug block and a plug rod are fixed to one end of the splicing shaft, which can be used for splicing and fixing with the main rotating shaft. The auger blade 2 and the auger blade 1 cooperate together to evenly transport the polyurethane mixture in the middle of the inner cavity of the material discharge box to the two ends of the material discharge box. By replacing splicing shafts of different lengths and sliding the adjustment box to ensure the splicing and fixing between the splicing shaft and the main rotating shaft, the overall length of the device can be adjusted to adapt to roads of different widths, thereby ensuring that the device has a wider range of application and can be adjusted accordingly according to actual needs on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a side view schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the internal structure of the material box of the present invention;

[0029] Figure 4 This is a schematic diagram of the internal structure of the regulating box of the present invention;

[0030] Figure 5 A half-section schematic diagram of the regulating box structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the separation of the splicing shaft and the main shaft structure of the present invention;

[0032] Figure 7 It is a schematic cross-sectional view of the overall structure of the present invention;

[0033] Figure 8 This is a schematic diagram of the connection between the winding turntable and the wire rope structure of the present invention;

[0034] Fig. 9 It is a partially cutaway schematic diagram of the winding turntable structure of the present invention.

[0035] In the figure: 1. feed box; 2. discharge box; 21. mounting frame; 22. arc baffle; 23. discharge port; 24. adjustment positioning hole; 3. main shaft; 31. auger blade one; 32. splicing plate; 33. polygonal slot; 34. plug-in hole; 4. adjustment box; 41. positioning frame; 42. positioning stud; 43. baffle rod; 5. splicing shaft; 51. auger blade two; 52. polygonal plug-in block; 53. plug-in rod; 54. bearing seat; 55. sealed bearing; 6. winding turntable; 61. storage slot; 62. clamping stud; 63. connecting shaft; 64. torsion spring; 7. wire rope; 71. collar; 8. limit cover plate; 81. fastening stud. DETAILED DESCRIPTION

[0036] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figures 1 to 9 , the present invention provides a technical solution:

[0038] Embodiment 1, a polyurethane mixture pavement construction device, comprises: a feed box 1, a regulating box 4 and a winding turntable 6.

[0039] Specifically, a discharge box 2 is fixedly connected to one end of the feed box 1, and the middle part of the discharge box 2 is connected to the feed box 1. A conveying component mainly composed of a belt conveyor is installed inside the feed box 1, which is used to transport the polyurethane mixture into the middle part of the inner cavity of the discharge box 2. The lower side of the discharge box 2 is arranged into an inverted "eight"-shaped discharge port 23, which can discharge the polyurethane mixture in an "I" shape to the ground for paving. A main rotating shaft 3 is rotatably installed in the inner cavity of the discharge box 2, and both ends of the outer side of the main rotating shaft 3 are provided with auger blades 31, and the two auger blades 31 rotate in opposite directions. The auger blades 31 are used to transport part of the polyurethane mixture in the middle part of the inner cavity of the discharge box 2 to the two end areas of the discharge box 2, so that the polyurethane mixture discharged from the discharge port 23 is more uniform. Both ends of the main rotating shaft 3 are fixedly installed with splicing plates 32, and the surface of the splicing plate 32 is provided with a polygonal slot 33, and the bottom of the polygonal slot 33 is provided with a plug hole 34;

[0040] Secondly, there are two adjusting boxes 4, which are respectively slidably sleeved on the outer sides of the two ends of the feeding box 1. The inner cavity of the adjusting box 4 is rotatably installed with a splicing shaft 5. The outer side of the splicing shaft 5 is provided with an auger blade 2 51, and the auger blade 2 51 has the same rotation direction as the auger blade 1 31 at the corresponding position. The adjusting box 4 and the splicing shaft 5 serve as the adjusting components of the device. The length of the feeding box 2 is adjusted according to the width of the on-site road surface to ensure that the polyurethane mixture can cover the entire road surface. A polygonal slot 33 is fixed at one end of the splicing shaft 5. Block 52, a plug-in rod 53 adapted to the plug-in hole 34 is fixed on the surface of the polygonal plug-in block 52, and the splicing shaft 5 can approach the end of the main shaft 3 by sliding the adjustment box 4 close to the unloading box 2, until the polygonal plug-in block 52 and the plug-in rod 53 are respectively plugged into the inner cavity of the polygonal slot 33 and the plug-in hole 34, at which time the plug-in rod 53 can support the splicing shaft 5 to prevent the splicing shaft 5 from falling, and the polygonal plug-in block 52 and the polygonal slot 33 can cooperate to transmit the splicing shaft 5, ensuring that the main shaft 3 can drive the splicing shaft 5 to rotate synchronously when rotating;

[0041] Furthermore, the winding turntable 6 is rotatably installed in the middle of the surface of the discharge box 2, and a steel wire rope 7 is passed through the middle of the winding turntable 6. The two ends of the steel wire rope 7 are respectively fixedly connected to the two adjusting boxes 4. When the winding turntable 6 rotates, the steel wire rope 7 can be wound, thereby driving the two adjusting boxes 4 to slide in opposite directions synchronously, thereby improving the sliding splicing efficiency between the adjusting boxes 4 and the discharge box 2.

[0042] In order to relatively fix the wire rope 7 and the winding turntable 6, the present application also has an annular receiving groove 61 on the surface of the winding turntable 6 for winding the wire rope 7, and a clamping stud 62 is threadedly inserted into the bottom of the receiving groove 61, and one end of the clamping stud 62 is pressed on the surface of the wire rope 7, which can ensure the relative fixation between the wire rope 7 and the winding turntable 6, and a connecting shaft 63 is fixedly provided in the middle of the winding turntable 6, and the connecting shaft 63 is rotatably installed on the surface of the lower material box 2 through a bearing, so that the winding turntable 6 can only rotate on the surface of the lower material box 2, and will not be separated from the lower material box 2.

[0043] In order to make the installation process of the adjusting box 4 easier, the present application also has a torsion spring 64 sleeved on the outer side of the connecting shaft 63, and the two ends of the torsion spring 64 respectively fix the surface of the winding turntable 6 and the surface of the discharge box 2. The torsion spring 64 is set to reset the rotation of the winding turntable 6, and cooperate with the manual push of the sliding of the adjusting box 4 to ensure that the installation process of the adjusting box 4 is easier. Moreover, due to the tightening of the adjusting box 4 by the wire rope 7, the adjusting box 4 always has a tendency to move close to the middle of the discharge box 2. Therefore, the splicing shaft 5 and the main rotating shaft 3 are more stable after splicing and will not be easily separated.

[0044] In order to fix the end of the wire rope 7 with the adjustment box 4, the present application also has a ring 71 fixedly connected to both ends of the wire rope 7, a columnar protrusion is provided on the surface of the adjustment box 4 and is movably inserted into the inner cavity of the ring 71, and a limited cover plate 8 is provided on one side of the ring 71. A fastening stud 81 is fixed on the surface of the limit cover plate 8, and the fastening stud 81 is threadedly inserted into the middle part of the columnar protrusion, such as Figure 8 and Figure 4 As shown, the cooperation between the collar 71 and the columnar protrusion ensures that the steel wire rope 7 can pull the adjustment box 4 to move, and the setting of the limit cover plate 8 and the fastening stud 81 can position the collar 71 to avoid separation between the collar 71 and the columnar protrusion.

[0045] In order to ensure that the polyurethane mixture is spread evenly, the present application also has a mounting frame 21 fixed on the inner wall of the discharge box 2 for the main rotating shaft 3 to be movably penetrated and connected, which can be used to limit the main rotating shaft 3. The main rotating shaft 3 can only rotate without position displacement. Arc baffles 22 are arranged on both sides below the main rotating shaft 3. Two arc baffles 22 are arranged and are respectively fixed on the inner walls on both sides of the discharge box 2. The arc baffles 22 are arc-shaped and concentric with the main rotating shaft 3. The two arc baffles 22 are symmetrically distributed and a gap is left between them. When the polyurethane mixture enters the middle part of the inner cavity of the discharge box 2, the setting of the arc baffle 22 can slow down the falling speed of the polyurethane mixture, so that the auger blade 31 can timely transport the polyurethane mixture to the two ends of the lower box 2, thereby ensuring that the polyurethane mixture can be spread evenly in an "I" shape.

[0046] In order to position the adjusting box 4, the present application also has a positioning stud 42 which is threaded through the top surface of the adjusting box 4, and the top surfaces of both ends of the discharge box 2 are provided with a plurality of adjustment positioning holes 24 which are evenly spaced and linearly distributed along the length direction of the discharge box 2. The lower end of the positioning stud 42 is inserted into the inner cavity of the adjustment positioning hole 24, and the insertion and cooperation of the positioning stud 42 and the adjustment positioning hole 24 can be used to position the sliding of the adjusting box 4 to avoid easy relative sliding between the adjusting box 4 and the discharge box 2.

[0047] In order to improve the stability of the adjusting box 4 and avoid tilting, the present application also has a baffle 43 fixed on the lower side of the adjusting box 4. The baffle 43 is perpendicular to the length direction of the adjusting box 4 and rests against the lower edge of the discharge port 23. The outer movable sleeve of the baffle 43 is provided with a sleeve concentric therewith. The setting of the baffle 43 is used to improve the stability of the adjusting box 4 and avoid the adjusting box 4 from shaking and tilting on the outer side of the discharge box 2, which affects the paving effect of the polyurethane mixture.

[0048] In order to facilitate the replacement of the splicing shaft 5, the present application also has a bearing seat 54 movably sleeved on the outer side of the other end of the splicing shaft 5, and a sealed bearing 55 is arranged between the bearing seat 54 and the other end of the splicing shaft 5. A positioning frame 41 is fixed on the inner wall of the end of the adjusting box 4 away from the discharge box 2, and the bearing seat 54 is inserted into the inner cavity of the positioning frame 41 and adapted thereto. The cooperation between the bearing seat 54 and the positioning frame 41 can be used to support and position the other end of the splicing shaft 5. When the adjusting box 4 slides and separates from the discharge box 2, the bearing seat 54 can also be removed from the inner cavity of the positioning frame 41, so as to facilitate the replacement of the splicing shaft 5 and the auger blade 2 51, thereby changing the length of the splicing shaft 5 to adapt to road surfaces of different widths.

[0049] The present invention also discloses a construction method according to the above-mentioned polyurethane mixture pavement construction device, which specifically comprises the following steps:

[0050] Step 1: Construction Preparation

[0051] ① Preparation of working surface: At present, 2cm AC-5SBS modified asphalt mixture has been laid, and the curbstones on both sides have been constructed. Before construction, the asphalt bottom surface layer is cleaned; at the same time, the rainwater grate is initially fixed;

[0052] ② Construction layout: Since the elevation of the bottom surface layer has been preliminarily controlled, before the construction of the test section, the elevation of the polyurethane mixture pavement (the size from the curb down) is written on the left and right curbs every 10 meters along the mileage direction. The floating reference beam is used at the central axis to control the thickness and flatness of the paving layer.

[0053] ③ Preparation of construction tools: Prepare the construction tools, equip the site with a sufficient number of electric sprayers (capacity of 20L or more, no less than 12), and 4 water tanks of 200L or more (to store water on site);

[0054] ④ Construction machinery preparation: configure sufficient number of construction equipment, including 2 double steel wheel rollers, 1 rubber wheel roller, 1 small steel wheel roller, 1 forklift, and 1 water truck. Before construction, check whether the equipment models match and whether they are operating normally;

[0055] ⑤ Before construction, the stress absorption layer shall be inspected and accepted. If it does not meet the requirements (water seepage, compaction, appearance quality, etc.), rework shall be carried out;

[0056] ⑥The number of construction workers meets the requirements and the management staff have clear division of labor.

[0057] In addition, the polyurethane used in the test section is a single-component polyurethane adhesive, which is liquid at room temperature and black in color. It should be stored in a sealed dry container in its natural state. Polyurethane must not come into contact with water during storage, production and transportation of polyurethane mixtures, and the operating temperature range is required to be 35±5℃.

[0058] The polyurethane coarse aggregate should be kept clean, dry and non-weathered. Hard and wear-resistant crushed stone, such as basalt, diabase, limestone, etc., should be selected. The gradation of single-grade coarse aggregate should be stable, the crushing value should not exceed 26%, the Los Angeles abrasion loss should not exceed 28%, the needle-like particle content should not exceed 15%, and the water absorption rate should not exceed 2%.

[0059] Fine aggregate is machine-made sand, which is manufactured by a special sand-making machine and is produced with high-quality crushed stone of 10 to 20 mm. The fine aggregate should be clean, hard, dry, free of impurities and other harmful substances, with a sand equivalent of not less than 60%, an angularity (flow time) of not less than 30s, and a water absorption rate of not more than 2%.

[0060] Coarse and fine aggregates should be dried 2 to 3 days before use (drying temperature 120-160℃), stored in storage bins with rainproof sheds in grades, and allowed to stand at room temperature for use.

[0061] Step 2: Material mixing and transportation

[0062] (1) The mixed material mixing equipment can use an asphalt concrete intermittent mixer and set up a separate polyurethane adding system;

[0063] (2) The mixing station should have a sufficient number of storage silos, and the storage silos should be equipped with rainproof sheds;

[0064] (3) The discharge temperature should be controlled at no more than 80°C. The order of adding materials during mixing is: coarse and fine aggregates → delay 2s → polyurethane adhesive → mixing for 25s. The mixed material should be uniform, without white material, agglomeration or serious separation of coarse and fine materials. Mixtures that do not meet the requirements shall not be used and the mixing time should be increased and remixed.

[0065] (4) When the mixer discharges materials into the material transport vehicle, the 3-step or 5-step unloading method is adopted, starting from the rear half of the vehicle and loading forward;

[0066] (5) Before loading the transport vehicle, clean the compartment, keep it dry and free of moisture, and then spray a thin layer of isolation agent;

[0067] (6) Cover the material transport box filled with mixed materials with a clean tarpaulin, which covers the entire box and ensures that the entire box is sealed without any gaps;

[0068] (7) The transport vehicle should arrive at the construction site at the specified time (determined according to the mixture curing time) and should not stop on the way to ensure continuous paving construction on site;

[0069] (8) Before unloading, the tarpaulin should be removed to inspect the appearance of the material transport vehicle. If any quality problems such as agglomeration or partial solidification of the mixture are found, the vehicle should be suspended from use until further verification;

[0070] (9) It is strictly forbidden for material transport vehicles to turn around or make turns on the applied adhesive layer. All material transport vehicles should turn around outside the construction section in advance. A dedicated person should be assigned to clean the working surface to prevent mud from sticking to the tires of the material transport vehicles and contaminating the underlying layer.

[0071] Step 3: Paving

[0072] Before construction, storage tanks and stacking sites for various materials should be reasonably arranged. The storage of various materials should comply with the specifications. Various construction machinery and tools should be fully inspected to ensure they are in good condition. The number of machines should be sufficient and the construction capacity should be matched. Key and important machinery should have spare equipment or accessories.

[0073] ① Before paving, the sprayer is filled with water. A water storage tank is placed every 20 meters and filled with water. Four water tanks are used in rotation;

[0074] ② Before paving, adjust the overall length of the unloading box 2 and the adjustment box 4 according to the width of the on-site road surface: release the relative fixation between the adjustment box 4 and the unloading box 2 by loosening the positioning studs 42, slide the adjustment box 4 until the adjustment box 4 and the unloading box 2 are completely separated, replace the splicing shaft 5 of the inner cavity of the adjustment box 4, and re-set the adjustment box 4 on the outside of the unloading box 2. The torsion force of the torsion spring 64 and the manual operation can easily slide the two adjustment boxes 4 closer to each other until the plug-in rod 53 and the polygonal plug block 52 are respectively plugged into the plug-in shaft 5. The hole 34 and the inner cavity of the polygonal slot 33 are fixed with the positioning stud 42 to fix the regulating box 4 relatively to the unloading box 2. Then, the conveying assembly in the feeding box 1 conveys the polyurethane mixture unloaded by the material transport vehicle to the middle of the inner cavity of the unloading box 2. The auger blade 1 31 and the auger blade 2 51 cooperate to evenly convey the polyurethane mixture to various positions of the inner cavity of the unloading box 2 and the regulating box 4. The polyurethane mixture falls to the ground in a uniform straight line under the action of gravity, and is evenly paved on the road surface as the material transport vehicle moves.

[0075] ③ The paving speed should be controlled at 1.5-3m / min and the speed should be kept uniform;

[0076] ④ After paving 10m of the road section, water is sprinkled on the surface manually with an electric sprayer. According to the road width (12m), two people are responsible for a 2m range and arranged in a line. Two people alternate between "storing water and sprinkling water" to ensure that the sprinkling is uninterrupted and no water is missed. The sprinkling amount is 1kg / m2;

[0077] ⑤ Construction shall not be carried out when the daily minimum temperature is below 5℃, the ground is wet, or it is raining or snowing;

[0078] ⑥ After the paving operation is completed, the adhering mixture should be cleaned up in time.

[0079] Step 4: Compact

[0080] (1) The initial compaction starts 15 minutes after artificial watering. Two 12t double-wheel rollers are used for the initial compaction, each rolling twice. The rolling speed is controlled at 2-3 km / h. The rollers of the double-wheel rollers spray water normally during driving.

[0081] (2) The selection of recompacting time is determined by the ambient temperature and the change of the mixture state. When the ambient temperature is 20℃ and the CO2 emission begins to decrease, recompacting should be started 1 hour after artificial watering. The recompacting time should be adjusted accordingly with the increase or decrease of the ambient temperature. The recompacting is carried out by a 26t rubber-wheeled roller for two times, and the rolling speed is controlled at 3-5km / h. The roller shall not stop at will during the rolling process.

[0082] (3) The final compaction of the mixture is carried out after the recompacting is completed. A 12t double steel wheel roller is used to statically compact the mixture once to ensure a smooth surface. The compaction speed is controlled at 3-6 km / h.

[0083] (4) For areas that are difficult to roll with large rollers, such as around manhole covers, road edges, widening and bay parking strips, it is advisable to use small vibratory rollers or vibratory tamping plates for additional rolling;

[0084] (5) The length of the rolling section should be controlled within 50m to 80m. The same model and tonnage of rollers should be used for the same rolling process. It is strictly forbidden for the roller to stay on the compacted road surface.

[0085] Step 5: Joint treatment and maintenance

[0086] ①Before construction, use a small milling machine to mill off the loose parts of the longitudinal joints and clean the joints manually;

[0087] ② Use a 3m ruler to check the flatness of the ends of the construction joints, and use a road cutter to cut off all the mixtures that do not meet the requirements of the flatness of the ends, clean the joints, and when spreading the SBS modified asphalt tack coat, also spread asphalt on the cut surface of the joints;

[0088] ③ The joints should be rolled with a 3t small double-wheel roller. First, roll the new paved surface about 150mm above the formed road surface, and roll the joints 150mm apart each time until the roller rolls all the way to the new paved surface.

[0089] ④ The polyurethane surface layer will not be open to traffic until it has been rolled and has not been completely cured. Pedestrians and vehicles are prohibited from entering during the traffic closure period. Under normal conditions, it requires maintenance for 1 to 3 days.

[0090] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polyurethane mixture pavement construction device, characterized in that: include: A feed box (1), one end of the feed box (1) is fixedly connected to a feed box (2), the middle of the feed box (2) is connected to the feed box (1), the lower side of the feed box (2) is provided with an inverted "eight"-shaped feed opening (23), the inner cavity of the feed box (2) is rotatably mounted with a main rotating shaft (3), both ends of the main rotating shaft (3) are fixedly mounted with a splicing disk (32), and a polygonal slot (33) is provided on the surface of the splicing disk (32), and a plug hole (34) is provided at the bottom of the polygonal slot (33); An adjusting box (4), wherein two adjusting boxes (4) are provided and are respectively slidably sleeved on the outer sides of both ends of the feed box (1); a splicing shaft (5) is rotatably mounted in the inner cavity of the adjusting box (4); a polygonal plug-in block (52) adapted to the polygonal slot (33) is fixed to one end of the splicing shaft (5); and a plug-in rod (53) adapted to the plug-in hole (34) is fixed to the surface of the polygonal plug-in block (52); A winding turntable (6) is rotatably mounted on the middle of the surface of the unloading box (2), a steel wire rope (7) is passed through the middle of the winding turntable (6), and two ends of the steel wire rope (7) are respectively fixedly connected to the two adjustment boxes (4).

2. A polyurethane mixture pavement construction device according to claim 1, characterized in that: Both ends of the outer side of the main rotating shaft (3) are provided with auger blades one (31), and the two auger blades one (31) have opposite rotation directions. The outer side of the splicing shaft (5) is provided with auger blade two (51), and the auger blade two (51) has the same rotation direction as the auger blade one (31) at the corresponding position.

3. A polyurethane mixture pavement construction device according to claim 2, characterized in that: The surface of the winding turntable (6) is provided with an annular receiving groove (61), the bottom of the receiving groove (61) is threadedly plugged with a clamping stud (62), and one end of the clamping stud (62) is pressed on the surface of the wire rope (7), and a connecting shaft (63) is fixedly provided in the middle of the winding turntable (6), and the connecting shaft (63) is rotatably mounted on the surface of the discharge box (2) through a bearing.

4. A polyurethane mixture pavement construction device according to claim 3, characterized in that: The outer side of the connecting shaft (63) is sleeved with a torsion spring (64), and the two ends of the torsion spring (64) are respectively fixed to the surface of the winding turntable (6) and the surface of the unloading box (2).

5. A polyurethane mixture pavement construction device according to claim 4, characterized in that: Both ends of the steel wire rope (7) are fixedly connected to a collar (71); a columnar protrusion is provided on the surface of the regulating box (4) and is movably inserted into the inner cavity of the collar (71); a limiting cover plate (8) is provided on one side of the collar (71); a fastening stud (81) is fixed on the surface of the limiting cover plate (8), and the fastening stud (81) is threadedly inserted into the middle part of the columnar protrusion.

6. A polyurethane mixture pavement construction device according to claim 5, characterized in that: The inner wall of the material discharge box (2) is fixed with a mounting frame (21) for the main rotating shaft (3) to be movably connected therethrough, and arc-shaped baffles (22) are arranged on both sides below the main rotating shaft (3). Two arc-shaped baffles (22) are arranged and are respectively fixed to the inner walls on both sides of the material discharge box (2), and the arc-shaped baffles (22) are in the shape of an arc and are concentric with the main rotating shaft (3). The two arc-shaped baffles (22) are symmetrically distributed and a gap is left between them.

7. A polyurethane mixture pavement construction device according to claim 6, characterized in that: The top surface of the adjustment box (4) is provided with a positioning stud (42) through which a thread passes, and the top surfaces at both ends of the discharge box (2) are provided with a plurality of adjustment positioning holes (24) which are linearly distributed at equal intervals along the length direction of the discharge box (2), and the lower end of the positioning stud (42) is inserted into the inner cavity of the adjustment positioning hole (24).

8. A polyurethane mixture pavement construction device according to claim 7, characterized in that: A blocking rod (43) is fixed on the lower side of the regulating box (4), the blocking rod (43) is perpendicular to the length direction of the regulating box (4) and abuts against the lower edge of the feed opening (23), and a sleeve concentric with the outer side of the blocking rod (43) is movably sleeved.

9. A polyurethane mixture pavement construction device according to claim 8, characterized in that: A bearing seat (54) is provided on the outer movable sleeve of the other end of the splicing shaft (5), and a sealed bearing (55) is provided between the bearing seat (54) and the other end of the splicing shaft (5). A positioning frame (41) is fixed on the inner wall of the end of the regulating box (4) away from the discharge box (2), and the bearing seat (54) is inserted into the inner cavity of the positioning frame (41) and adapted thereto.

10. A construction method of the polyurethane mixture pavement construction device according to claim 9, characterized in that: The specific steps include: Step 1: Construction preparation: After the construction of the curbstones on both sides is completed, the asphalt bottom surface layer is cleaned, the rainwater grate is initially fixed, and the stress absorption layer is inspected and accepted every 10 meters corresponding to the polyurethane mixture pavement elevation along the mileage direction, and relevant equipment and tools are prepared; Step 2: Material mixing and transportation. The polyurethane mixture is mixed with an asphalt concrete intermittent mixer. The order of adding materials during mixing is: coarse and fine aggregates → delay 2s → polyurethane adhesive → mixing for 25s. When discharging materials from the mixer to the material transport vehicle, the multiple unloading method is adopted, starting from the rear half of the vehicle and loading forward, and the material transport vehicle delivers it to the designated location; Step 3: paving. Before paving, adjust the overall length of the unloading box (2) and the regulating box (4) according to the width of the on-site road surface: release the relative fixation between the regulating box (4) and the unloading box (2) by loosening the positioning studs (42), slide the regulating box (4) until the regulating box (4) and the unloading box (2) are completely separated, replace the splicing shaft (5) in the inner cavity of the regulating box (4), and re-set the regulating box (4) on the outer side of the unloading box (2). The torsion force of the torsion spring (64) and the manual operation can easily slide the two regulating boxes (4) closer to each other until the plug rod (53) and the polygonal plug block (52) are connected. ) are respectively inserted into the inner cavity of the plug hole (34) and the polygonal slot (33), and the positioning stud (42) is tightened to fix the regulating box (4) and the unloading box (2) relatively, and then the conveying component in the feeding box (1) conveys the polyurethane mixture unloaded by the material transport vehicle to the middle of the inner cavity of the unloading box (2), and the auger blade 1 (31) and the auger blade 2 (51) cooperate to uniformly convey the polyurethane mixture to various positions in the inner cavity of the unloading box (2) and the regulating box (4), and the polyurethane mixture falls to the ground in a uniform straight line under the action of gravity, and is evenly paved on the road surface as the material transport vehicle moves; Step 4: Compacting: Use two 12t double steel wheel rollers to roll twice for initial compaction, one 26t rubber wheel roller to roll twice for recompacting, and one 12t double steel wheel roller to roll once for final compaction. For the parts that are difficult to roll, use a small vibrating roller for additional compaction. Step 5: Joint treatment and maintenance. Before construction, use a small milling machine to mill off the loose parts of the longitudinal joints, clean the joints manually, use a 3m ruler to check the flatness of the ends of the transverse joints, cut off all the mixtures that do not meet the requirements of end flatness with a pavement cutter, clean the joints, and when spreading the SBS modified asphalt tack coat, also spread asphalt on the cut surface of the joints. Use a 3t small double-steel wheel roller for static rolling at the joints. First, roll the new paved layer about 150mm over the formed road surface, stagger the joints by 150mm each time, until the roller rolls all the way to the new road. Close traffic and prohibit pedestrians and vehicles from entering before the polyurethane surface layer is completely solidified after rolling. The maintenance time is 1 to 3 days.

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