29 results about "Pavement milling" patented technology

The invention relates to the technical field of recycling of renewable resources, in particular to an asphalt pavement milling material cold-recycled prefabricated part and a preparation method, and the asphalt pavement milling material cold-recycled prefabricated part is prepared from the following raw materials in parts by weight: 45 to 53 parts of waste pavement milling material with the particle size of less than 4.75 mm, 19 to 27 parts of waste pavement milling material with the particle size of 4.75 to 9.5 mm, 20 to 28 parts of stone chips, 1 to 1.4 parts of mineral powder, 1.6 to 2.0 parts of silica fume, 4.6 parts of water, 2.3 to 2.7 parts of cement and 2.3 to 2.7 parts of foamed asphalt. According to the invention, the waste asphalt pavement milling material is used as the raw material of the concrete prefabricated component, so that the resource is saved, the utilization rate of the asphalt milling material is increased, and the green development concept is met; the prefabricated parts are manufactured through a cold regeneration process, compared with a traditional hot mix plant regeneration process, energy is saved, environment friendliness is achieved, emission of greenhouse gas is reduced, and therefore the problems that the hot mix plant regeneration mode is high in cost and carbon emission are solved.

The present invention discloses a highway construction and maintenance device, belonging to the technical field of pavement maintenance equipment. The device comprises a vehicle frame, a pavement milling structure fixedly mounted on the front end of the vehicle frame, the pavement milling structure being fixedly connected to a gravel collecting device, a fixedly connected milling pavement hammering structure provided at the end of the vehicle frame, and the gravel collecting device being disposed between the pavement milling structure and the milling pavement hammering structure. In order to quickly compact the pavement after milling and prevent the falling of soil and rocks at the edges of milled potholes, the present invention provides a highway construction and maintenance device. While compacting the potholes after milling, the device also pushes and presses the loose soil and rocks at the edges of the pit, thereby stabilizing the pit edge and facilitating the stable connection of subsequently poured concrete with the original concrete in the pit.

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 belongs to the technical field of pavement construction, and particularly relates to a pavement structure and a pavement construction method and device.The pavement structure comprises a mounting frame, a roller body and cutters, the roller body is rotationally mounted in an inner cavity of the mounting frame, the cutters are annularly distributed on the outer surface of the roller body, and a dismounting part is arranged on the outer surface of the roller body; wherein the plurality of cutters are rotationally mounted outside the disassembly and assembly part, and the plurality of cutters can be replaced at any time through the disassembly and assembly part. The cutters can be quickly replaced through the disassembly and assembly part, so that the density and size of the cutters on the surface of the roller body are changed to adapt to road surfaces under different working conditions, the roller body does not need to be replaced together, the construction cost of a construction unit is reduced, the cutter replacement efficiency is improved, and meanwhile, the angle between the cutters and the outer surface of the roller body is changed under the action of the adjusting part; pavements with different hardness can be quickly milled through the cutter, so that the pavement milling efficiency is improved, and meanwhile, the service life of the cutter is prolonged.

The invention discloses a hot in-place recycling construction method for a rubber asphalt pavement. The method comprises the following steps: firstly spreading a preimpregnation agent, then carrying out heating-raking-stirring treatment to obtain a pavement milling old material, adding a second component and a first component of the rubber asphalt regenerant into the old material, then mixing with a new aggregate formed by mixing the second component and a third component of the rubber asphalt regenerant, adding a fourth component, and uniformly mixing to obtain the pavement milling old material. After uniform mixing, hot in-place recycling paving and rolling construction is carried out; and finally, uniformly spreading a vulcanization sealing layer, heating the pavement, and naturally cooling the pavement to finish in-situ thermal regeneration construction. The construction method disclosed by the invention solves the problems of high mixture viscosity, difficulty in raking, turning and stirring, difficulty in recovery of viscoelastic characteristics of an aged cementing material, poor skid resistance of the regenerated pavement and easiness in water damage of the hot in-place recycling rubber asphalt pavement, and realizes hot in-place recycling of the rubber asphalt pavement with excellent performance.

The present utility model provides a pavement milling drum, a pavement milling device, and a pavement planer. The pavement milling drum comprises a disc-shaped support body, the support body has a circumferential surface and a bottom surface arranged in sequence from top to bottom, the bottom surface is arranged towards the pavement, and the circumferential surface surrounds the bottom surface and is connected to the bottom surface along the edge of the bottom surface; a plurality of first milling teeth are arranged on the bottom surface around a rotation axis of the support body, and a plurality of second milling teeth are arranged on the circumferential surface around the rotation axis of the support body. The problem of crushing and leveling protruding rocks on the pavement is solved.

The utility model relates to the field of pavement milling machines, and discloses a walking asphalt concrete pavement milling napping machine which comprises a frame, a moving mechanism, a steering mechanism, a lifting mechanism, a power mechanism, a spraying mechanism and a milling machine tool, a handrail is arranged at the top of the frame; the moving mechanism comprises wheels, and the wheels are rotatably arranged at the bottom of the frame; the input end of the steering mechanism penetrates through the top of the frame, the output end of the steering mechanism is connected with at least one wheel, and the steering mechanism is used for controlling the advancing direction of the wheel; the milling machine tool is mounted at the bottom of the frame; the lifting mechanism is mounted between the frame and the moving mechanism and is used for controlling the distance between the frame and the moving mechanism; the power mechanism is used for providing power for the milling machine tool; the spraying mechanism comprises a spray head which is used for spraying water to the milling machine tool and the road surface. By using the steering mechanism, the problem that the conventional milling equipment must be forcibly pushed to steer and is limited in use in a narrow space is solved.

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 utility model provides a roadbed cross section structure. The roadbed cross section structure comprises a medial strip, a road main body, a road side slope and a side ditch which are transversely symmetrical by taking a longitudinal center line of a road as a symmetry axis and are sequentially arranged from the longitudinal center line of the road to the outer side of the road, the road main body comprises a road surface and a roadbed which are sequentially arranged from top to bottom, and the roadbed comprises a roadbed and a roadbed bottom layer which are sequentially arranged from top to bottom; the roadbed adopts a multi-layer lime soil mixture; a cushion layer is arranged in the roadbed bottom layer; and the cushion layer is paved by adopting an original pavement milling material. The structure is simple and reasonable, the integrity is high, the structural strength and stability of the roadbed are improved, the stability and durability of the pavement and the overall structure of the road are improved, and damage is reduced; the reasonable road arch gradient and side slope gradient ratio are designed, so that road drainage is facilitated, and road driving safety is also facilitated; the original pavement milling material is used for cushion layer construction, so that the construction is simple, the cost is reduced, the emission of construction wastes is reduced, the pollution is reduced, and the environment is protected.

The utility model discloses a transverse shaft type cutting device with a built-in excitation mechanism, and belongs to the technical field of structural design of rock-soil tunneling and pavement milling equipment. According to the transverse shaft type cutting device with the built-in shock excitation mechanism, the drum type cutting device, the driving device, the shock excitation device and the shock excitation driving device are arranged, and the two ends of the shock excitation chamber assembly in the shock excitation device are respectively connected with the inner wall of the drum type cutting device through bolts, so that torque can be transmitted to the shock excitation chamber assembly; and then an eccentric block assembly in the vibration excitation device and the vibration excitation driving device drive the eccentric block assembly to rotate to generate centrifugal force, so that the drum-type cutting device generates vibration, the vibration impact composite rock breaking effect is achieved, abrasion of cutting teeth and the cutting surface can be effectively reduced, and the cutting performance of the cutting device is improved.

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 utility model discloses a modularized box cover placing rack, which comprises a support, the support comprises a bottom plate, the bottom plate is provided with a plurality of water leakage holes, the edge of the upper side of the bottom plate is provided with a plurality of bent plates, the lower side of the bottom plate is provided with a mounting seat, and the support is fixed on equipment through the mounting seat; and the plurality of horizontal quick clamps are mounted on the bracket, and the horizontal quick clamps are used for fixing the instrument box cover on the bracket. The modularized box cover placing frame is simple in structure, convenient to install, reliable to use and capable of effectively fixing an instrument box cover of pavement milling machine equipment or movable mechanical equipment under similar construction conditions.

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.

The present utility model provides a pavement milling drum, a pavement milling device, and a pavement planer. The pavement milling drum comprises a disc-shaped support body, the support body has a circumferential surface and a bottom surface arranged in sequence from top to bottom, the bottom surface is arranged towards the pavement, and the circumferential surface surrounds the bottom surface and is connected to the bottom surface along the edge of the bottom surface; a plurality of first milling teeth are arranged on the bottom surface around a rotation axis of the support body, and a plurality of second milling teeth are arranged on the circumferential surface around the rotation axis of the support body. The problem of crushing and leveling protruding rocks on the pavement is solved.

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 highway construction maintenance equipment, and belongs to the technical field of pavement maintenance equipment.The highway construction maintenance equipment comprises a frame, a pavement milling structure is fixedly mounted at the front end of the frame and fixedly connected with a gravel collecting device, and a milling pavement hammering structure fixedly connected with the frame is arranged at the tail end of the frame; and the broken stone collecting device is arranged between the pavement milling structure and the milled pavement hammering structure. In order to quickly tamp a pavement after the pavement is planed and milled and prevent soil and stones at the edge of a planed and milled pit hole from falling off, the invention provides the highway construction maintenance equipment, while the planed and milled pit hole is tamped, loose soil and stones at the edge of a tunnel are pushed and pressed, so that the edge of the tunnel is stable, and the construction efficiency is improved. And the subsequent poured concrete can be stably connected with the original concrete in the tunnel.

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 provides a rainwater pipeline excavation and backfill structure, which relates to the technical field of road drainage engineering, is arranged below a roadbed, has a trapezoidal structure with a narrow lower part and a wide upper part, and comprises a foundation layer, a stone chip backfill layer and an undisturbed soil backfill layer which are sequentially arranged from bottom to top, the rainwater pipeline is embedded in the stone chip backfill layer and the undisturbed soil backfill layer; the top of the undisturbed soil backfill layer is higher than the top of the outer pipe wall of the rainwater pipeline; and the base layer is paved by adopting stone chips and / or original pavement milling materials. The rainwater pipeline excavation structure is simple and reasonable in structure and high in integrity, the strength and stability of the rainwater pipeline excavation structure are improved, the leakage prevention capacity of the rainwater pipeline is improved, the stability and drainage performance of the rainwater pipeline are guaranteed, and damage is reduced; the original pavement milling material is used for foundation layer construction, so that the process is simplified, the cost is reduced, the emission of construction wastes is reduced, the pollution is reduced, and the environment is protected.

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.

The invention provides a cold milling method for an asphalt pavement in an arid desert region, and belongs to the technical field of cold milling of asphalt pavements. Comprising a milling device body, a dust collecting box is installed at the top of the milling device body, a first protective plate is installed at the bottom of the milling device body, a milling cutter is installed at the position, close to the first protective plate, of the milling device body, and a second protective plate is installed at the bottom of the dust collecting box. By arranging the collecting and cleaning mechanism, an aged pavement can be cleared more quickly and more effectively by utilizing a cold milling technology, sufficient raw materials are provided for subsequent production of a recycled asphalt mixture, the production efficiency is improved, and residues generated after pavement milling are quickly collected and treated by utilizing the collecting and cleaning mechanism, so that the production efficiency is improved. Residues and dust are collected into a dust collection box from a dust suction opening, and when the dust collection box is almost full of the residues, a first hydraulic rod body is started to do telescopic motion.

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.

The utility model provides a recycled pavement milling material crushing device which comprises an upper supporting frame body, a lower supporting bottom frame, a supporting column, a control box, an upper damping seat, a first driving motor, a crushing main box body, a pavement milling material adding hopper, a lifting lug ring, an anti-blocking discharging hopper assembly and a second driving motor, the supporting columns are longitudinally welded between the upper supporting frame body and the lower supporting bottom frame. The control box is connected to the left side of the front portion of the upper supporting frame body through screws. And the upper damping seat is in bolted connection with the left side of the upper part of the upper supporting frame body. The two double-tooth roller bodies are driven to rotate in the opposite directions under the action of the first driving motor and the second driving motor, material blocks are broken, the crushing effect is improved under the action of fixing the crushing blocks, and the crushing quality is enhanced; and under the action of the sound insulation cotton layer, noise diffusion is reduced, the overall structure is reasonable, and assembling is simple and practical.

The invention discloses a shielded equipment elevation measurement method based on a multi-equipment cluster, and belongs to the technical field of equipment elevation measurement in construction, the multi-equipment cluster comprises three laser transmitters P, N and M and three laser receivers A, B and X respectively matched with the three equipment, the measurement method comprises the following steps: calculating absolute elevations of A and B based on P, N and M respectively and absolute elevations of X based on N and M; calculating an elevation difference between every two laser receivers based on a certain laser transmitter, and correction values between A and B based on N and M respectively; and introducing the elevation difference and the correction value to calculate the absolute elevation of the X based on the P, namely the elevation of the shielded equipment. According to the method, the measurement precision is remarkably improved, the obtained result is very close to the absolute elevation of X based on P under the condition of no shielding, the method is particularly suitable for pavement paving, roadbed leveling, pavement milling and other constructions in road construction, and the construction quality and the construction efficiency are improved.