15 results about "Rut" patented technology

The application discloses an evaluation method for the coordinated deformation behavior of an embedded sensor and asphalt mixture, and there is no specification and accurate evaluation method for the coordinated deformation behavior of the embedded sensor and the asphalt mixture at present. The evaluation method is used for obtaining the tire action times corresponding to the cracking of an asphalt mixture rut test piece, the tire action times corresponding to the sensor misalignment node, and the tire action times corresponding to the sensor failure node as evolution evaluation indexes, and the coordinated deformation behavior between the sensor and the mixture is calculated and evaluated by using the three evolution evaluation indexes. The application can obtain the service life of the embedded sensor intelligent sensing structure under different load sizes and loading frequencies, is beneficial to subsequent determination of the best embedding process, embedding position of the sensor and mixture mix design matched with the deformation of the sensor or other related key parameters, and provides accurate data support for the design of a long-service-life and high-precision intelligent road embedded sensing system.

The utility model provides a kind of asphalt mixture rut testing machine, it includes: vertical support frame, plane moving device, lifting device, steering mechanism and asphalt mixture fixing device;Lifting device is located in vertical support frame inner frame top, lifting device output end connects lifting platform, and one end of lifting platform is slidably connected with plane multidirectional moving device;The output end of plane multidirectional moving device is equipped with steering mechanism, and plane multidirectional moving device is used to drive steering mechanism to move in X and Y direction relative to lifting platform;Steering mechanism below is equipped with pressure wheel;Vertical support frame bottom wall is opened and placed groove, and placed groove is used to place asphalt block to be tested, and vertical support frame is equipped with asphalt mixture fixing device located at the side of placed groove, the utility model is controlled by the cooperation of plane multidirectional moving device and steering mechanism, and pressure wheel can realize the arbitrary direction movement and angle deflection of plane trajectory, significantly improve the authenticity and data reliability of rut test.

The utility model relates to the technical field of road engineering, and discloses an anti-rut asphalt road layer structure based on hard asphalt, which comprises a roadbed, a base layer paved on the roadbed, a stress absorption layer paved on the base layer, an anti-rut asphalt surface layer paved on the stress absorption layer, and an anti-rut asphalt surface layer paved on the stress absorption layer. And an anti-rut asphalt surface lower layer is paved above the anti-rut asphalt surface upper layer. The fine-grain type asphalt concrete layer and the medium-grain type asphalt concrete layer which are made of hard asphalt have high softening points, viscosity and a good grading structure, so that the rut resistance and the overall stability of the pavement can be improved, the rubber asphalt stress absorbing layer can absorb and disperse stress, adapt to deformation, reduce the risk of cracks and ruts, improve the durability and prolong the service life of the pavement. Longitudinal and transverse drainage blind ditches in the roadbed are communicated with drainage ditches, drainage can be conducted in time, water stability can be improved, and glass fiber grids laid in the asphalt concrete layer can limit deformation, enhance integrity and anti-fatigue performance, improve anti-rutting capacity and prolong the service life.

This invention discloses a multi-dimensional adjustable rut covering mechanism, comprising a fixed base and two covering plates; each covering plate is connected to a first adjusting plate with a first arc hole, which allows adjustment of the opening and closing angle between the two covering plates; it also includes a movable base and a transition plate; the movable base is connected to the fixed base via a height adjustment mechanism; the two transition plates are rotatably mounted on the movable base; each movable base is equipped with a covering plate, and a second adjusting plate is fixed on the covering plate to adjust the angle of the covering plate relative to the transition plate; the first adjusting plate is fixedly installed relative to the transition plate. Based on the three-dimensional adjustment structure, the posture of the covering plates can be effectively adjusted as needed to adapt to the rut characteristics and covering requirements of different tractor models. The connection structure and connection sequence between the movable base, transition plate, and covering plates are reasonably configured, resulting in a compact structure with high reliability and convenient adjustment.

The utility model discloses an asphalt anti-rut agent adding device, and relates to the technical field of asphalt processing, the asphalt anti-rut agent adding device comprises a shell, a weighing cylinder is slidably connected in the shell, four rotating shafts are rotatably connected to the bottom end in the weighing cylinder, the outer sides of the four rotating shafts are fixedly connected with baffles, and the baffles are fixedly connected to the outer sides of the four rotating shafts. Two second connecting rods are arranged on one side of the weighing cylinder, two pull rods are hinged to one sides of the two second connecting rods, one ends of the four rotating shafts penetrate through the weighing cylinder and are fixedly connected with the four pull rods, a storage hopper is fixedly connected to the top of the shell, and a first spiral conveying rod is rotationally installed on one side of the interior of the shell. According to the asphalt anti-rut agent adding device, the second connecting rod is pulled to drive the pull rod to rotate and swing, so that the multiple baffles are controlled to open or close the bottom of the weighing cylinder, and the weighed materials are conveniently discharged while the materials are weighed.

Equipment (100) is provided for filling an elongate hole in the ground, such as a rut formed by the wheel of an irrigation pivot. A sled (108) includes a pair of ground engaging skids (116) with an opening (118) therebetween and a chute (122) above the opening (118). A bottom discharge hopper (106) with a controlled door arrangement (138) at an outlet (120) is provided on a wheeled trailer chassis (104) to feed filling material into the chute (122). The sled (108) has a pulling beam (110) pivotably fastened to an underside of the chassis (104). A grading shoulder (134) provides a back edge of the opening to level the material deposited into the hole.

The application discloses a kind of semi-rigid base asphalt pavement rut cause step-by-step diagnostic method, comprising: the cause element corresponding to the analysis of four types of rut is classified and constructed rut disease cause library and key rut diagnostic index system;Call cause library and index system, carry out rut diagnosis first step: road section basic information investigation, the cause of rut disease is preliminarily diagnosed through environment, linear information etc.;Carry out rut diagnosis second step: overall data comprehensive analysis, the cause of rut disease is diagnosed through the comprehensive analysis of historical data and detection data;Carry out rut diagnosis third step: target area fine test diagnosis, the cause of rut disease is fine judged through supplementary detection and coring test, combined with rut type-layer position-cause classification method.This application realizes progressive diagnosis from surface to inside, from simple to complex by step-by-step diagnostic method, can accurately judge the cause of rut section, provides accurate basis for targeted maintenance decision.

The invention discloses an ultra-thin asphalt wearing layer dynamic stability correction method considering non-uniform load, which comprises the following steps: step 1, comparing vertical stress of a pavement structure containing an ultra-thin wearing layer under the conditions of non-uniform load and uniform load, and calculating a vertical stress influence coefficient, establishing a vertical stress influence coefficient empirical model considering the thickness effect of the ultrathin wearing layer; 2, grading correction factors are selected according to road engineering grades and / or climate conditions; 3, calculating a non-uniform load influence coefficient based on a vertical stress influence coefficient empirical model and a selected grading correction factor; and 4, correcting the dynamic stability of the ultra-thin wearing layer material obtained by carrying out the rutting test by using the non-uniform load influence coefficient to obtain the corrected dynamic stability of the ultra-thin wearing layer material. According to the method, the high-temperature rutting resistance of the asphalt mixture under the action of the non-uniform load can be evaluated, so that the material strength and fatigue design of the ultrathin wearing layer are more accurate.

The utility model provides a high-temperature anti-rutting deformation performance testing mechanism which comprises a testing device, an environment temperature and humidity control device, a loading speed and load control device and a data acquisition and analysis device, and the testing device is used for acquiring anti-rutting deformation performance data of an asphalt test piece; the environment temperature and humidity control device is used for adjusting the temperature and humidity of the surrounding environment of the asphalt test piece, and the loading speed and load control device is used for applying continuous load to the asphalt test piece so as to simulate performance tests under different traffic load conditions; the data acquisition and analysis device is used for acquiring, processing and analyzing the anti-rutting deformation performance data so as to evaluate the high-temperature stability of the asphalt test piece. The high-temperature anti-rutting deformation performance testing mechanism realizes comprehensive evaluation of the anti-rutting deformation performance of the asphalt test piece under a high-temperature condition, and has important significance for improving the engineering quality of a pavement prepared from the asphalt test piece.

This invention discloses a testing method for recycled asphalt thin-layer overlay materials based on three-dimensional fitting, belonging to the field of road engineering material performance testing technology. The method includes: S1, preparing standard rutting slab specimens; S2, conducting accelerated loading tests, determining the initial friction coefficient, recording the number of loading cycles and rutting depth, and measuring the friction coefficient at preset nodes to construct a dataset (,,,). S3, establishing a three-dimensional prediction model through nonlinear regression; S4, obtaining the on-site rutting depth and cumulative load, substituting them into the model to obtain the predicted friction coefficient value, and evaluating the skid resistance and durability performance accordingly. This invention achieves dynamic prediction of skid resistance and durability through three-dimensional fitting of the number of loading cycles, rutting depth, and friction coefficient, overcoming the static limitations of single-point testing.

The utility model provides a kind of asphalt mixture rut sample forming machine, it is related to rut sample forming machine technical field, including workbench, the inside of workbench is provided with lifting assembly, the top of lifting assembly is provided with steel mould box, the top of workbench is opened with sliding slot, the inside sliding connection of sliding slot has steel mould box;The top of workbench is fixedly installed with support frame, the side of support frame close to workbench is provided with pressing plate, the top of pressing plate is fixedly installed with multiple pressure sensors.In the utility model, on the one hand, by setting lifting assembly and the mutual cooperation of push plate, the existing device can improve working quality as far as possible, under the condition of no stop, efficient pressing is carried out, on the other hand, by setting pressure sensor at pressing plate, the pressure in pressing process is detected in real time, the uneven stress condition is avoided, and the final forming quality is affected.

1. The name of the design product: micro-rotation type land leveler. 2. The use of the design product: used for leveling the ruts produced by the tractor when sowing wheat. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view. 5. The bottom surface of the design product is the part that is not easy to see or cannot be seen during use, and the top view is omitted.

The invention discloses an asphalt mixture rutting experimental device and experimental method.The asphalt mixture rutting experimental device comprises a base, a lifting supporting frame is fixedly connected to the base, and a pair of mounting plates is fixedly connected to the lower end of an upper end wall plate of the lifting supporting frame; a swing arm is rotatably connected between the pair of mounting plates, the lower end of the swing arm is fixedly connected with an arc-shaped rolling plate, the base is fixedly connected with a pair of supporting blocks, and the pair of supporting blocks is arranged between the two side walls of a lifting supporting frame. The positive and negative threads are arranged on the rotating rod, the pair of clamping plates is mounted on the positive and negative threads, and the clamping plates are driven to move through rotation of the rotating rod, so that a sample mold is clamped and fixed through the clamping plates, and the sample mold is convenient to fix; and meanwhile, when the asphalt mixture in the sample mold needs to be rotated in the compaction process, the sample mold is convenient to disassemble and assemble through the rotating rod, so that the sample mold is convenient to rotate.

The invention discloses an anti-rut regulation and control method for regenerated warm mix asphalt of a large-mixing-amount milling material, and relates to the technical field of automatic control, and the method comprises the following steps: step 1, carrying out a needle penetration test and a softening point test on old asphalt in the milling material to obtain an old asphalt needle penetration value and an old asphalt softening point value; performing a melting point test on the to-be-doped warm mixing agent to obtain a melting point value of the warm mixing agent; 2, establishing a two-dimensional rectangular calculation domain, dividing the two-dimensional rectangular calculation domain into a first calculation section, a second calculation section and a third calculation section in the horizontal direction, and extracting anti-rutting performance evaluation indexes after iteration is completed; and 3, comparing the anti-rutting performance evaluation index with a preset target threshold value, adjusting the matching parameter according to a comparison result, returning to the step 2 for re-simulation until a target requirement is met, and determining a final matching parameter. According to the method, coupling simulation of diffusion evolution and high-temperature viscous flow behaviors of new and old asphalt interfaces is realized, and an optimal matching scheme can be quickly screened in a virtual environment.

The application provides a geocell reinforced gravel base thickness design method and device, which comprises the following steps: acquiring geocell parameters and filler parameters; taking the ratio of the geocell height to the median particle size of the filler as an input parameter, combining a preset enhancement function and a geocell welding efficiency coefficient to generate a modulus enhancement value, multiplying the modulus enhancement value by the modulus of the filler to obtain a composite modulus. The method quantifies key parameters to construct a modulus enhancement model, breaks through the limitations of traditional design experience dependence, rigid safety factor and low calculation efficiency. Through a dynamic safety factor and an iterative algorithm, the rut depth and the safety reserve are accurately matched, the base thickness is thinned, the calculation efficiency is improved, the engineering cost is effectively saved, and the method is suitable for soft ground road engineering scenes.