14 results about "Pavement milling" patented technology

The invention discloses a UHPC (Ultra High Performance Concrete) composite structure for repairing bridge deck pavement diseases and a construction method, and aims to solve the technical problems of poor durability, insufficient bearing capacity and the like generally existing after the existing bridge deck pavement pit slot diseases are repaired. The method comprises the core technical links of bridge deck pavement milling, drilling and steel bar planting, steel bar mesh installation, UHPC mixing, pouring, maintenance and the like. By adopting a composite structure composed of the UHPC120 concrete and the asphalt concrete surface layer and matching with the reinforced connection design of the HRB400-grade twisted steel mesh and the implanted erection steel bars, the bonding strength between the repairing layer and the original bridge deck concrete pavement layer is effectively improved, the structural integrity and the anti-cracking performance are enhanced, and the service life of a bridge is remarkably prolonged. The technology is suitable for repairing bridge floor cavities, pit slots and other diseases of various types of bridges, and has wide engineering application prospects.

The invention relates to the technical field of pavement engineering, and discloses an asphalt pavement crack repairing and milling machine. Comprising a vehicle body and a dust cover installed at the front end of the vehicle body, and a first storage box, a second storage box, a third storage box, a stirring box and an air blowing device are further arranged in the vehicle body. A milling cylinder is mounted in the dust cover; and a first conveying belt and a second conveying belt are further arranged behind the milling cylinder. A first discharging port and a second discharging port are formed in the bottom of the vehicle body, and the first discharging port is located in front of the second discharging port. The width of the first discharge port and the width of the second discharge port are the same as the width of the milling cylinder. A first air suction port is further formed in the vehicle body in the dustproof cover, the rear portion of the first air suction port is communicated with a second storage box, and a second air suction port is formed in one side of the second conveying belt and connected with the second storage box. The stirring box is communicated with the first storage box, and the second storage box is connected with the second discharge port. A blowing opening is further formed in one side of the second conveying belt. And the stirring box is communicated with the first storage box and the third storage box. The construction process of highway pavement milling and asphalt filling can be completed, old highway materials can be effectively recycled, the old highway materials and new asphalt materials are mixed to achieve regeneration of the old highway materials, the material utilization rate is increased, and pollution and old highway material loss caused by flying dust in the cutting process are reduced.

The invention provides a step planing and milling device for pavement engineering and a planing and milling machine, belongs to the field of pavement planing and milling, and aims to solve the problems that a planing and milling machine cannot carry out side surface step planing and milling at a joint of a new road and an old road, so that the joint is poor in bonding quality and easy to damage. Comprising a mounting base, a transverse adjusting unit, a swinging execution unit, a lateral planing and milling head and a spraying unit, through cooperative cooperation of the transverse adjusting unit and the swing executing unit, the position and angle of the lateral milling head in the horizontal direction (transverse direction) and the vertical direction (depth) can be accurately controlled, so that the lateral milling head can stably and regularly mill a step structure on the side face of an old road, and the problems that a traditional milling machine can only mill a whole plane, and the milling efficiency is low are solved. And high-quality joint treatment cannot be completed under special working conditions such as half-range passing and connection of new and old roads.

The old road surface milling material grading recycling device comprises a transverse supporting frame, and a transverse conveying frame extending left and right is installed in the middle of the top face of a top plate of the transverse supporting frame; a middle drying device and a magnetic suction treatment device are fixed to the top face of a top plate of a transverse supporting frame in the middle of the transverse conveying frame. A double-geared-roller crusher is fixed to the ground on the right side of the transverse supporting frame, the discharging end of the transverse conveying frame is located over a top receiving opening of the double-geared-roller crusher, and a linear vibrating screen device is fixed to the ground on the right side of the double-geared-roller crusher. And a first lifting conveying frame is arranged between the double-geared roller crusher and the linear vibrating screen device. The milling material is dried and magnetized, the content of ferromagnetic substances in the milling material is reduced, and meanwhile, the milling material is dried, so that the double-geared roller crusher is not influenced during subsequent crushing.

The application relates to a road milling leveling device based on milling depth real-time feedback and a construction method thereof, which comprises a vehicle frame, a guide frame, a bearing beam in sliding connection with the vehicle frame, a sliding frame in fixed connection with the bearing beam and in sliding connection with the guide frame and a milling drum detachably mounted on the sliding frame; the milling drum can slide relative to the vehicle frame, can switch working states when encountering a road bump convex position, can control the milling drum to move, can increase the milling time of the road bump convex position, can gradually mill and level the road bump convex position by controlling the depth of cut, can avoid local uneven cutting of the milling drum when the milling drum encounters the road bump convex position, can effectively increase the service life of the cutter of the milling drum, and can make the area after road milling more flat.

This invention relates to the technical field of roadbed aggregate processing equipment, and discloses an integrated secondary crushing and screening device for road milling material. The device includes a conveying and processing cylinder that conveys and secondary crushes the road milling material entering it. A lifting and transfer box communicating with the interior of the conveying and processing cylinder is located on the front side of the cylinder. A screening box for further screening of the processed road milling material is located on one side of the lifting and transfer box, and discharge boxes for discharging the processed road milling material are located on both sides of the bottom of the screening box. By adding and setting an anti-clogging screening mechanism, when processing the road milling material after preliminary crushing, this mechanism not only evenly distributes the milling material on the grading screen through a material disperser to avoid re-agglomeration caused by local accumulation, but also drives the screen to vibrate at high frequency and micro-amplitude using an electromagnetic vibrator to quickly break the adhesion between the asphalt and the screen, preventing screen clogging.

This invention provides a method, apparatus, electronic device, and storage medium for determining road milling parameters, relating to the field of intelligent road maintenance technology. The method includes: acquiring point cloud data of the original road surface of a target road segment; determining a target smoothing algorithm based on the road longitudinal slope corresponding to the original road surface point cloud data, the target smoothing algorithm including a linear three-dimensional surface smoothing algorithm or a parabolic three-dimensional surface smoothing algorithm; determining a smooth milling surface at a preset initial milling depth based on the target smoothing algorithm and the original road surface point cloud data; and determining milling parameter data for the target road segment based on the original road surface point cloud data and the smooth milling surface. This invention selects a suitable three-dimensional smoothing algorithm based on the road longitudinal slope of the original road surface and performs three-dimensional smoothing on the entire road surface based on the overall elevation distribution of the original road surface, ultimately obtaining a smooth milling surface. This smooth milling surface can be used as the target surface for milling construction, thus achieving non-uniform depth milling and improving the smoothness of the road surface after milling construction.

The invention discloses a pavement milling material recycled asphalt mixture based on an epoxy system and a preparation method of the pavement milling material recycled asphalt mixture. The preparation method comprises the following steps: step 1, RAP pretreatment; step 2, premixing an epoxy system; step 3, fusion of the aggregate and asphalt: adding the RAP and the aggregate, heating to 140-150 DEG C, and adding new asphalt under high-speed hot stirring to form a mixture; step 4, doping into an epoxy system: adding epoxy premixed liquid drops into the mixture at 140-150 DEG C, and continuously carrying out high-speed thermal stirring; in the stirring process, the curing agent and the epoxy resin are subjected to a cross-linking reaction to form a three-dimensional epoxy net structure; an epoxy group of the epoxy resin and an active group in the asphalt are subjected to chemical reaction to form a chemical bond, so that the molecular structure of the asphalt is reconstructed; then, the reconstructed asphalt molecules are embedded into the epoxy network structure to form the regenerated asphalt mixture with the epoxy-asphalt interpenetrating network structure, so that the problems of insufficient performance recovery, low road index, poor construction adaptability and high cost in the existing RAP regeneration technology are solved.

The invention belongs to the technical field of road construction and maintenance machinery, and provides road construction maintenance equipment. The invention discloses road construction maintenance equipment which comprises a self-walking vehicle frame. The pavement milling part, the gravel cleaning part, the pavement hammering and tamping part and the vibration isolation part are sequentially arranged on the frame in the advancing direction of the frame; the pavement milling part comprises a milling roller, a driving motor and a depth adjusting hydraulic cylinder; a plurality of planing nails are arranged on the outer wall of the milling roller; the broken stone cleaning part comprises a telescopic adjusting electric cylinder, a cleaning sweeper and a rotating motor; the pavement hammering and tamping part comprises a hydraulic impact hammer, a hammer body and a lifting oil cylinder; and the vibration isolation part is used for isolating vibration. In conclusion, the road construction maintenance equipment is reasonable in design, easy to operate and capable of effectively solving the problems that a transmission chain is too long and vibration damage is caused, and therefore the road construction maintenance equipment is suitable for industrial popularization.

The utility model discloses a street pavement marking milling device which comprises a moving trolley and a milling seat, a lifting seat is fixedly arranged at the top of the milling seat, a through hole is formed in the moving trolley, the lifting seat penetrates through the through hole, a motor I is fixedly arranged on the outer wall of the bottom of the moving trolley, an adjusting screw rod is arranged on an output shaft of the motor I, and a motor II is arranged on the adjusting screw rod. And the adjusting lead screw penetrates through the interior of the lifting base in a threaded mode, the interior of the milling base is rotationally connected with a milling roller through a bearing, and a second motor is fixedly arranged on the outer wall of one side of the milling base. The first motor can drive the adjusting lead screw to rotate, the lifting seat can be driven to axially move on the adjusting lead screw, the lifting seat can drive the milling seat to ascend and descend, the height of the milling roller can be adjusted according to different milling depths of street pavements, use is more flexible and convenient, practicability is improved, and the service life of the milling roller is prolonged. And the exhaust fan can suck dust generated during milling around the moving trolley into the water tank through the air duct, the dust suction pipe and the input pipe.

The application discloses a kind of based on image recognition's highway reconstruction and extension old road shoulder pavement milling boundary determination method, realize the automatic identification and positioning of old road shoulder milling boundary.For the highway reconstruction and extension old road shoulder pavement milling boundary, obtain the multi-view image of road surface using unmanned aerial vehicle oblique photography.Construct improved YOLO11 detection model, utilize training set to carry out model training, optimize main network, neck network and head network, and introduce all-purpose image repair network suitable for a variety of complex scenes in main network, add bidirectional feature pyramid network in neck network, replace detection head with dynamically improved detection head with pertinence, to improve calculation efficiency and accuracy.Improve the YOLO11 detection model to identify shoulder milling boundary features, solve the problems of low efficiency, poor accuracy and insufficient safety in traditional manual survey, realize the intelligent identification of highway reconstruction and extension old road shoulder milling boundary.

The application discloses a road reconstruction old pavement milling and recycling device and relates to the technical field of waste recycling. The device comprises an anti-adhesion crushing mechanism and a crushing box installed on the outer side of the anti-adhesion crushing mechanism. A mixing mechanism is arranged at the bottom of the anti-adhesion crushing mechanism, and a fixing support is arranged in the mixing mechanism. The anti-adhesion crushing mechanism comprises a first motor protective cover which is fixedly installed on the outer side of the crushing box. A crushing motor is fixedly installed on one side in the first motor protective cover. A crushing driving gear is fixedly connected to the output end of the crushing motor. A crushing driven gear is meshingly connected to one side of the crushing driving gear. Crushing rollers are fixedly installed on the outer sides of the crushing driving gear and the crushing driven gear. The anti-adhesion crushing mechanism can realize multi-stage crushing and screening of the recycled materials, avoid the crushing adhesion of asphalt materials, and improve the recycling effect of the pavement recycled materials.

The invention relates to a pavement milling and leveling device based on real-time feedback of milling depth and a construction method thereof. The pavement milling and leveling device comprises a frame, a guide frame, a bearing beam, a sliding frame and a milling drum, wherein the bearing beam is connected with the frame in a sliding manner; the sliding frame is fixedly connected with the bearing beam and is connected with the guide frame in a sliding manner; the milling drum can slide relative to the frame, the working state can be switched, the milling drum can be controlled to move and the milling time of the raised parts of the road surface can be prolonged when the milling drum meets the raised parts of the road surface, and the situation that local cutting depth is uneven when the milling drum meets the raised parts of the road surface is avoided by controlling the cutting depth and gradually milling and leveling the raised parts of the road surface. The service life of a cutter of the milling drum can be effectively prolonged, and the milled area of a road surface can be smoother.

This disclosure relates to a cemented carbide impact tip for a road milling pick, a road milling pick comprising the same, use of the road milling pick, and a method of manufacturing the cemented carbide impact tip.