58results about How to "Guaranteed compaction effect" patented technology

The invention discloses a test method for measuring maximum dry density of soil and stone mixture of a road subgrade. The test method comprises the following steps of loading samples into a test die by two times, fixing onto a vibration compaction test instrument, and performing vibration compaction for two times, wherein the vibration compaction time is 50s each time, the parameter setting of the compaction test instrument is as follows: the vibration frequency is 25Hz, the excitation vibration force is 5.5kN, the nominal vibration amplitude is 1.4mm, the loading mass is 110+ / -2kg, the unloading mass is 170+ / -2kg, the eccentric block included angle is 0 degree, and the pressure of the static surface is 109kPa; testing the water content of each sample, and calculating the dry density of each sample; repeating the compaction test for five times, and drawing the dry density-water content relationship curve, wherein the transverse coordinate is the water content, and the longitudinal coordinate is the dry density; the dry density corresponding to the curve peak is the maximum dry density roudmax, and the corresponding water content is optimum water content omega0. The test method has the advantages that the operation is simple and convenient, the results are reliable, the variance is small, and the destroy to the raw materials is small.

The invention discloses a lifting-type compactor for agricultural production. The lifting-type compactor for agricultural production comprises a machine frame, a rotating wheel disc, a lifting sleeving plate, a compacting rod, a supporting plate, a rotating disc and a compacting plate. A guiding column is fixedly installed to the surface of an outer ring of the rotating wheel disc and sleeved withthe lifting sleeving plate in a sliding mode, the top end of the compacting rod is fixedly welded to the bottom end of the middle of the lifting sleeving plate, the supporting plate is fixedly installed to the bottom end of the compacting rod, the rotating disc is rotationally arranged at the bottom of the supporting plate in a sliding mode, and the compacting plate is connected to the bottom ofthe rotating disc through a plurality of springs. The lifting-type compactor for agricultural production is simple in structure, convenient to use and stable in structure, land can be compacted and smoothed, the compacting and smoothing effects are good, time and labor are saved, and the lifting-type compactor is suitable for application and popularization.

Disclosed in the present invention are a pile bottom grouting cavity and a use method thereof, and a poured pile body and a construction method of the poured pile body. The pile bottom grouting cavitycomprises: a grouting capsule having an expansion state in which the interior thereof is filled with slurry to bear a pile body and a contraction state in which the interior thereof is empty; a grouting tube in communication with the inner chamber of the grouting capsule so as to grout the grouting capsule; and a check valve provided at a communication position between the grouting tube and the grouting capsule so as to block plugs within the grouting capsule from entering the grouting tube. The present invention avoids the problem in the prior art that the grouting tube is blocked due to a mixture of mud, sediment and the like in the grouting capsule entering the grouting tube.

The invention discloses a compaction device used on turf. The device comprises a support plate. A handle is arranged on the support plate. The handle is hinged with the support plate. Rollers are arranged on the lower end of the support plate and are rotatably connected with the support plate. A vertical rod is arranged at the middle part of the support plate. The vertical rod penetrates through the support plate and is slidably connected with the support plate. A pressure plate is arranged on the lower end of the vertical rod. The pressure plate is connected with the vertical rod. A spring is arranged between the upper end of the vertical rod and the support plate. A movable plate is arranged above the support plate. One end of the movable plate is hinged with the support plate. A connection block is arranged on the movable plate at a position away from the hinge point. A bar-shaped hole is provided on the connection block. A pin which can slide along the length direction of the bar-shaped hole is arranged in the bar-shaped hole. The pin is fixedly connected with the handle. A water tank is fixedly connected on the movable plate. A water sprinkling mechanism is arranged on the water tank. With the device, turf planting efficiency is improved.

The invention relates to ra oad soil filling and compacting device, in particular to a road soil filling and compacting device. The technical problem of the invention is to provide a road clay fillingcompaction device capable of compacting the filled clay while transporting the clay for filling, crushing large pieces of clay, and facilitating flexible movement. A road soil filling and compactingdevice comprises a bottom plate, a mounting frame, a rotating shaft, a drum, a mounting seat, a box body, a discharging pipe, a shielding cover, a fixed pulley, a guide sleeve, a drawing rope, a drawing rod, a feeding hopper, etc. A mount bracket is uniformly connected with the front and rear sides of the bottom plate, a rotating shaft is connected with the corresponding mounting brackets of the front and rear sides, and a roller is connected with the rotating shaft. The invention preliminarily crushes the soil through the arranged crushing block, the toggle plate further crushes the soil while pulling out the soil, and the compaction plate can crush the soil laid on the road again while leveling the soil on the road, thereby facilitating the subsequent compaction work.

The invention discloses a paving method for a tropical zone road surface. The paving method comprises the steps that 1, a subbase layer is renovated so as to meet the paving requirements for graded broken stone; 2, the subbase layer is paved with the graded broken stone; 3, after the effect that the graded broken stone is paved uniformly is ensured, the graded broken stone is compacted in a combination rolled mode to form a graded broken stone base layer; the compaction steps comprise that on the first day, the graded broken stone is subjected to initial rolling and re-rolling, in the first time re-rolling process, the graded broken stone is moisturized and then subjected to final rolling, and surface finishing and slurry purifying are conducted; and on the second day, the graded broken stone is re-rolled again; and 4, the surface of the graded broken stone is paved with bituminous concrete to form a surface layer. According to the paving method for the tropical zone road surface, the road surface structural design of combining the subbase layer and the graded broken stone base layer with the surface layer is adopted and has great advantages on the aspects that the reflection cracks of a tropical zone road which is located in a zone with long rainy season time and is prone to being damaged by water are prevented, the base layer can drain the water away quickly to prevent water damage, and the damage of the base layer is self-healed.

The invention belongs to the technical field of animal husbandry and in particular relates to hay crushing and compression equipment for the animal husbandry. Aiming at the problems of no drying function, manual material transportation and inconvenience for utilization, the invention provides the following scheme: the hay crushing and compression equipment comprises a base, wherein one side of thetop of the base is connected with a transition cabin through a fastening bolt; a first driving motor is connected with a middle position of an outer wall of one side of the transition cabin through afastening bolt; an output shaft of the first driving motor is connected with a material discharging shaft through a fastening bolt; one end of the outer wall of the top of the transition cabin is connected with a supporting column through a fastening bolt; the top of the supporting column is connected with a drying cabin through a fastening bolt. According to the hay crushing and compression equipment for the animal husbandry, hays are sufficiently dried before being crushed and compressed, and the moisture content of the hays is low enough, so that the hay crushing and compressing quality isimproved and the hays are prevented from being stacked in the drying cabin; the hays do not need to be manually transported, so that the time and labor are saved, and crushing, screening, material transportation and compression are integrated; the hay crushing and compression equipment is convenient and easy to operate and the hay compaction effect is ensured.

The invention relates to a system and a method for controlling an engine of a road roller. The system comprises a load detecting unit, a rotating speed setting unit and an ECU (Electronic Control Unit), wherein the load detecting unit is used for detecting the overall load of the road roller and generating a target torque according to the overall load; the rotating speed setting unit is used for setting the rotating speed of the engine as a preset rotating speed; the ECU is used for calculating a preset torque according to the preset rotating speed, comparing the target torque with the preset torque, controlling the rotating speed of the engine to be smaller than the preset rotating speed if the target torque is larger than the preset torque, and controlling the rotating speed of the engine to be larger than the preset rotating speed if the target torque is smaller than the preset torque. By the system disclosed by the invention, the ECU is used for regulating the rotating speed of the engine of the road roller and has the advantages of high precision and quick response in comparison with a mechanical structure; therefore, the road roller is enabled to rapidly stabilize the rotating speed when the load is changed, and thus the compaction effect on the road surface is guaranteed.

A highway pavement repairing device comprises a heatable swing cylinder. A discharging port is formed in the bottom of the rear side of the swing cylinder, a feeding port is formed in the top of the swing cylinder, a front seat is included, the middle of the bottom end of the swing cylinder is rotatably connected to the top of the front seat, and a swing mechanism used for making the swing cylinder swing in a reciprocating mode is arranged on the rear side of the front seat. A guide groove with an adjustable inclination angle and a length is arranged in a rear side of the front seat, and a pull plate with the adjustable inclination angle is arranged on a front side of the front seat. A stirring mechanism for making a stirring shaft do reciprocating motion along an axial direction of the swinging cylinder and do reciprocating rotation along a circumferential direction of the swinging cylinder is arranged on the front side of the swinging cylinder; and a rear seat capable of moving frontand back is arranged on the rear side of the front seat, and a reciprocating seat capable of moving front and back is arranged at the bottom of the rear seat. In the invention, problems of non-uniform mixing of an asphalt mixture, low manual filling and leveling efficiency and a poor effect during repairing of a highway pavement at present are effectively solved.

The invention discloses a round plate compactor. The compactor comprises an upper surface plate and a lower tamping plate, wherein both the upper surface plate and the lower tamping plate adopt round structures; an engine is installed on an end surface of the upper surface plate; an armrest stand column is connected to the end surface of the upper surface plate; an armrest is arranged at the top end of the armrest stand column; a vibrating box is closely attached to the lower tamping plate; and the engine is connected with the vibrating box through a transmission assembly. The lower tamping plate of the round plate compactor adopts the round structure, so that in case that round corners or arc shapes appear during compaction operation, the compaction operation can be finished successfully, and the compaction effect of the ground can be guaranteed.

The invention discloses a large-inclination-angle coal seam similar simulation experimental device and method. According to the large-inclination-angle coal seam similar simulation experimental device, on the basis of a mining physical similar simulation experimental device in the prior art, a hydraulic hoisting device or a lifting device is eliminated, and a right-triangle-shaped protection plate is additionally arranged; by virtue of different combinations of the right-triangle-shaped protection plate and a horizontal protection plate, the using functions of laying horizontal similar materials and laying large-inclination-angle similar materials can be realized. The invention also discloses the experimental method using the experimental device. The experimental method is easy to operate, labor and material resources are saved, and different inclination angles of coal seam similar materials can be obtained by replacing triangular protection plates with different angles; more importantly, the whole experimental device does not need to be raised or lifted to be inclined in the experimental process, so that the similar materials can be compacted, and the truth and reliability of a simulation experiment result are further improved.

The invention belongs to the technical field of engineering machinery, and discloses a road roller gear shifting control device and a road roller gear shifting control method. The road roller gear shifting control device comprises an engine and an electric control gear shifting gearbox to which the output end of the engine is connected; a transmission shaft and a drive axle, the transmission shaft being arranged between the electric control gear shifting gearbox and the drive axle, and the electric control gear shifting gearbox being in transmission connection with the drive axle through the transmission shaft; an electric control handle device which is electrically connected to an accelerator interface of the engine; and an electric control valve group which is arranged on the electric control gear shifting gearbox and electrically connected to the electric control handle device, the electric control handle device being configured to control gear and advancing direction switching of the electric control gear shifting gearbox through the electric control valve group. According to the road roller gear shifting control device, the existing clutch pedal operation and a main clutch between the engine and the gearbox are removed, so that the structure of the whole machine is simplified, the cost of the whole machine is reduced, the labor intensity of operators is reduced, and the operation comfort is improved.

The invention relates to sofa surface layer automatic forming equipment, which comprises a horizontal work table, wherein the left end and the right end of the horizontal work table are respectively provided with a support frame, a driving roller and a driven roller are arranged between the two support frames and are in parallel arrangement at top and bottom, a gap allowing raw materials to pass is arranged between the driving roller and the driven roller, and the driving roller is connected with a driving device. The equipment belongs to the sofa surface layer automatic forming equipment with the advantages that the design is reasonable, the structure is simple, the operation is convenient, and the automation degree is high. When the forming equipment is used, the work time can be shortened, the work efficiency can be improved, the work intensity can be reduced, and the product quality can be improved.

The invention relates to a cotton core transfer and compaction integrated device and a compaction method. The cotton core transfer and compaction integrated device comprises a transfer wheel arranged in an installation frame, two compaction roller assemblies arranged above the transfer wheel, air cylinder pressure devices arranged above the compaction roller assemblies, and a negative pressure sucking assembly arranged on the side face of the installation frame. The negative pressure sucking assembly is matched with the transfer wheel and used for forming a negative pressure air distributing area on the cotton core compaction working side of the transfer wheel. One of the two compaction roller assemblies is an embossing roller, and the other compaction roller assembly is a smooth roller. A plurality of electric heating tubes are evenly distributed and arranged in the embossing roller, a plurality of electric heating tubes are evenly distributed and arranged in the smooth roller, a rotary collector ring is arranged at one end of the embossing roller, a rotary collector ring is arranged at one end of the smooth roller, and the electric heating tubes are connected with a power circuit through the rotary collector rings. The cotton core transfer and compaction integrated device can heat fibers in a cotton core to be fluffy and then compacted, and thus the compaction effect and compaction quality of the cotton core are effectively improved; meanwhile, the heating temperatures of the electric heating tubes are adjusted to adapt to processing of cotton cores with different material performances, the compaction effect of cotton cores made of different materials is ensured, and adaptability is high.

The invention discloses a model test device for researching pile-soil combined action and a test method thereof. The device comprises a model frame, a force transfer bracket, a micro soil pressure box, a guide pipe, a sleeve, a strain gauge, micro piles, a jack, a displacement dial indicator and a steel block. The model frame is filled with soil and compacted, and the micro piles are placed according to different pile intervals to realize a pile-soil interaction simulation test of different pile intervals; the micro soil pressure box and the strain gauge are arranged around the micro piles; the jack acts on the force transfer bracket and then acts on the soil; and the force transfer bracket converts a concentrated load generated by the jack into a uniformly distributed load, so that the thrust required by the test device is realized. A horizontal grading loading mode is used for pushing a slip mass to slide and damage along a preset sliding surface; the micro soil pressure box is used for measuring the soil pressure borne by the micro piles; and the strain gauge is used for monitoring mechanical deformation of the micro piles under the soil pressure.

The invention discloses a spreading device for a pouring type compound pavement. The spreading device comprises a pressing unit and a scattering device, wherein the pressing unit comprises a first driving assembly and a pressing plate unit; the first driving assembly is connected with the pressing plate unit and is used for driving the pressing plate unit to move up and down in the vertical direction; the pressing plate unit comprises a pressing plate and a plurality of vibrators; the plurality of vibrators are arranged on the pressing plate and are used for driving the pressing plate to vibrate in the horizontal direction; the scattering device comprises a second driving assembly and a spreading machine; the second driving assembly is arranged on the outer side of a side wall, which has the same extending direction, on the pressing plate, and is used for driving the spreading machine to move back and forth along the extending direction of the pressing plate; a movement track line of the spreading machine is parallel to the central line of the pressing plate, and the movement track line and the central line are located on the same vertical plane. By adopting the spreading device disclosed by the invention, automatic spreading is realized and the operation is convenient; the uniformity of spreading materials can be effectively ensured, the spreading time is shortened and the construction efficiency is improved; the spreading device is suitable for large-batch production, application and popularization.

The invention belongs to the technical field of building construction, and particularly relates to a foundation pit narrow area backfill compaction device which comprises a mounting plate, an air cylinder is fixedly connected to the outer wall of the bottom of the mounting plate, and a pressing plate is fixedly connected to the outer wall of the bottom of the air cylinder. According to the device, the anti-protrusion assembly is arranged, when the compaction assembly is used for compacting backfill soil, the backfill soil on the outer side of a pressing plate is prone to being extruded and protruding along with extrusion between the pressing plate and the backfill soil, and a third hydraulic cylinder is adjusted to drive a pushing plate to move; according to the backfilled soil compacting device, the pushing plate is arranged on the backfilled soil compacting device, so that the flattening roller below the pushing plate extrudes and flattens the bulged backfilled soil, the situation that the compaction position is hollow due to the bulged backfilled soil is prevented, the backfilled soil compacting effect is further improved, and in the extruding and flattening process of the flattening roller, the protection pieces at the two ends of the roller frame protect the flattening roller; and the condition that the smoothing roller rotates to drive the backfill soil to rise is prevented, and backfill soil backflow is avoided.

The invention belongs to the technical field of cleaning tools, and particularly relates to a novel garbage can. The novel garbage can comprises a can body, a can cavity is formed in the can body, a can cover is arranged on an opening of the can cavity, one end of the can cover is hinged to the outer wall of the can body, the center of the can cover is provided with a through hole, a circular rod movably penetrates through the through hole, and the top end of the circular rod is provided with a through groove, a horizontal shaft barrel is arranged between the two side walls of the through groove, and the horizontal shaft barrel is rotationally sleeved with a movable rod. A pressure plate is arranged below the circular rod and parallel to the can cover. The top face of the pressure plate is coaxially provided with an annular clamping groove. Magnet rings are arranged in the clamping groove, a blocking cover is arranged on an opening of the clamping groove, iron rings used for attracting the magnet rings are correspondingly arranged on the bottom face of the can cover, and the iron rings are located in another clamping groove and blocking cover. A flange is arranged on the bottom edge of the can body in the circumferential direction. The novel garbage can is simple and stable in structure, small in occupied space, capable of effectively compacting garbage to contain more garbage, quite sanitary and convenient to move.

The invention relates to a dynamic compaction construction process based on environmental protection, and relates to the technical field of dynamic compaction. The dynamic compaction construction process comprises the following steps of (S101) leveling a to-be-constructed site, setting a compaction point according to construction requirements, and burying gravel at the compaction point; (S102) arranging a watering cart lane on the leveled to-be-constructed site; (S103) controlling a watering cart to spray water to the to-be-constructed site along the watering cart lane in a first working area; (S104) controlling a dynamic compaction machine to conduct first point compaction on the compaction point of the first working area, and controlling the dynamic compaction machine to conduct first full compaction on the to-be-constructed site; (S105) drawing a circumscribed rectangle as a second working area according to the shape of the area which does not reach the preset standard after full compaction in the first working area, and controlling the dynamic compaction machine to conduct second full compaction along a compaction route; and (S106) controlling a bulldozer and a road roller to level and compact the to-be-constructed site after the second full compaction is completed. According to the dynamic compaction construction process, the dynamic compaction construction efficiency is effectively improved, and environmental pollution is reduced.

The invention discloses a preparation device for a high-strength corrosion-resistant alloy plate, and a corrosion-resistant alloy plate thereof. A limiting plate is welded at the top end of a sintering placement plate, and a shaping box is clamped at the side end of the limiting plate; an inner extrusion plate is placed at one end of the shaping box, and an extrusion spring is welded at one end of the inner extrusion plate; the outer side of the extrusion spring is sleeved with a double-layer protection sleeve; one end of the extrusion spring is spot-welded on an outer extrusion plate, and a cooling fan is installed at the top end of a sintering furnace; an exhaust pipe penetrates through the top end of an air collecting box, and an inlet-outlet pipe penetrates through the top end of an inlet-outlet box; the air inlet end of the inlet-outlet pipe is installed at the top end of the gas tank in a penetrating mode. Liquid-phase metal is extruded through the inner extrusion plate an the extrusion spring, and therefore the occupied space of molten metal is reduced; meanwhile, gas contained in liquid phases can be extruded during extrusion, and therefore the amount of the gas in the metal is reduced; the gas in the metal is exhausted through repeated pumping and inflating of the gas tank, and the influence of the gas on the metal in a solid-liquid state during sintering is reduced; and the quality and yield of the metal are guaranteed.

The invention discloses a rod pit tamping device for electric power engineering construction, and relates to the technical field of electric power construction. The rod pit tamping device comprises a frame body, sliding frames are fixed to the two sides of the lower surface of the frame body, and nail plates are arranged at the bottoms of the sliding frames; a driving frame is rotationally arranged at the bottom in the frame body; two oppositely-arranged limiting frames are arranged in the driving frame in a sliding fit mode, and a clamping grooves are formed in the limiting frames in a sliding mode; fan-shaped tamping grooves are fixed to the bottom ends of the clamping grooves, and a limiting clamping mechanism clamped to the ends of the clamping grooves is installed at the top end of the limiting frame; the top of the frame is in sliding fit with a winding box, a reel is rotationally arranged on the top in the winding box, a traction rope is wound around the reel, and the bottom end of the traction rope extends out of the winding box and is fixedly provided with a chuck clamped and matched with the fan-shaped tamping grooves. According to the rod pit tamping device, the clamping grooves and the fan-shaped tamping grooves are driven by the driving frame to vibrate circumferentially in a rod pit, the inner wall of the rod pit is tamped, the fan-shaped tamping groove is driven by the chuck to vertically ascend and descend, and the inner bottom is tamped; after a telegraph rod is buried, the rod pit can be tamped through the two fan-shaped tamping grooves.

The invention discloses equipment for reinforcing a silty-fine sand foundation of a passenger transport line, and belongs to the technical field of foundation reinforcement. The equipment comprises atubular pile and a pile tip, the pile tip is movably connected with the outer wall of the bottom of the tubular pile through a buckle, holes are uniformly formed in the bottom of the outer wall of thetubular pile, and a rotating device sleeves the tubular pile. The rotating device comprises an inner pipe inserted into an inner cavity of the tubular pile, a connecting block sleeves the top end ofthe outer wall of the inner pipe, an outer pipe sleeves the outer wall of the connecting block, and open holes are evenly formed in the bottoms of the outer pipe and the outer wall of the inner pipe.The inner pipe and the outer pipe are rotated by rotating the rotating device, so that the open holes and the holes are staggered. The connection between the silty-fine sand pile inside the tubular pile and the silty-fine sand of the foundation outside the tubular pile is broken, and the connection between the silty-fine sand pile, the silty-fine sand of the foundation outside the tubular pile andthe silty-fine sand inside the holes is further broken, so that the silty-fine sand pile or the silty-fine sand foundation compacted outside is not pulled in the pipe pulling process, and the compacted reinforced foundation is prevented from being damaged.

The invention relates to a concrete slump detection device, and the device comprises a supporting base; a supporting bottom plate is arranged on the upper surface of the supporting base, a detection cylinder is arranged on the upper surface of the supporting bottom plate, a supporting cross beam A is connected to the outer side face of the detection cylinder, the outer end of the supporting cross beam A is connected with a lifting mechanism A, and a box body is fixed to the upper surface of the supporting cross beam A; a push plate is arranged in the box body, the push plate is connected with the inner side face of the box body in an up-down sliding mode, and the lower surface of the push plate is connected with the supporting cross beam A through a lifting mechanism B. The side face of the box body is provided with a discharging port facing the direction of the detection cylinder, and the discharging port is located above the feeding port at the top end of the detection cylinder. A material pressing mechanism is arranged above the detection cylinder, the top end of the material pressing mechanism is connected to a supporting cross beam B through a telescopic mechanism A, and the two ends of the supporting cross beam B are connected with the supporting base through lifting mechanisms C respectively. The device has the advantages of being good in concrete compaction effect and high in detection structure accuracy.

The invention discloses a road roller capable of achieving step construction for road construction. The road roller comprises a vehicle body, a traveling wheel is arranged at the rear end of the bottom of the vehicle body, a road rolling wheel is arranged at the front end of the bottom of the vehicle body, a supporting plate is arranged at the front end of the vehicle body, a lifting device is arranged at the left end of the upper side of the supporting plate, a lifting plate is arranged at the upper end of the lifting device, a first motor is arranged at the lower side of the lifting plate, arotating shaft is arranged at the output end of the first motor. the lower end of the rotating shaft penetrates through the supporting plate and is provided with a rotating disc, the lower side of the rotating disc is provided with a cleaning brush, the lower side of the supporting plate is provided with a protective cover located outside the rotating disc, the right part of the upper side of thesupporting plate is provided with a trash suction box, the upper part of the left side of the trash suction box is provided with a trash suction pipe, the lower end of the trash suction pipe communicates with the protective cover, the upper part of the right side of the trash suction box is provided with an exhaust port, the exhaust port is provided with a filter net, and the exhaust port is provided with a fan. The road roller is simple in structure, convenient to use, good in road rolling effect and wide in application range.

The invention discloses a modular maintenance device capable of improving the survival rate of transplanted turf, and relates to the technical field of turf maintenance. The problems that the existing turf compaction is generally carried out through rollers, the local turf compaction effect is prone to being poor due to uneven ground in the compaction process, the survival rate of the turf is affected, and meanwhile, the contact area between the rollers and the ground is large in the compaction process, and the compaction force is small are solved. The modular maintenance device comprises a maintenance vehicle body; a set of height adjusting operation pieces are rotationally connected with the left side of the top of the maintenance vehicle body; and a set of adjusting lead screws are correspondingly and rotationally connected with four corners in the maintenance vehicle body. A compacting part slides up and down to flap the turf, treading of human feet is simulated, the turf is compacted, the compacting effect of the turf can be guaranteed even in a low-lying position, the compacting effect is good, and the situation that local turf is not compacted well is prevented; and meanwhile, the adjusting capacity is good, and the compacting force is adjusted according to needs.

The invention relates to a large forging asymmetric rolling reduction drawing-out process, specifically comprising the following steps: (1) performing rolling reduction with a small rolling reduction rate being 13-15% for the first pass; performing rolling reduction with each large rolling reduction rate being 25-35% for the second pass, wherein during rolling reduction of each pass, a forging subjected to the rolling reduction at the last pass is turned by 90 degrees, and a total pass number is not lower than 4; (3) performing rolling reduction by regulating the small rolling reduction rate to enable the forging to achieve a target forging. A center compacting effect of a large forging is realized with a smaller forging rate by optimizing the rolling reduction rate under the premise of not changing an original auxiliary tool, thus improving the internal forging quality of the forging; the forging method can be applied to a forging process of optimizing the large-scale forging, and has important meaning for improving the forging manufacturing efficiency and improving a finished product rate of the large-scale forging.

The invention provides a construction method of a high-speed railway asphalt graded broken stone foundation bed. The construction method comprises the following steps of construction preparation, spreading of permeable asphalt and / or adhesive asphalt, mixing of asphalt graded broken stone, transportation of the asphalt graded broken stone, paving of the asphalt graded broken stone, compaction of the asphalt graded broken stone and maintenance of the asphalt graded broken stone. The invention also provides the high-speed railway asphalt graded broken stone foundation bed prepared by the method.The asphalt graded broken stone foundation bed prepared through the construction method serves as a new high-speed railway subgrade structure form, subgrade filler can be saved, the subgrade bearingcapacity and the waterproof and drainage capacity are improved, the subgrade service life is prolonged, and the asphalt graded broken stone foundation bed has wide application prospects and remarkableeconomic and social benefits.

The invention belongs to the technical field of battery production and manufacturing, and discloses a battery production device and a battery production method. The battery production device comprises a feeding assembly, a lower die assembly, an upper die assembly and a pressing assembly, wherein the upper die assembly includes an upper cover and a lower pressing column, the upper cover is arranged above the feeding assembly, the lower pressing column is arranged on the side, close to the feeding assembly, of the upper cover, and the lower pressing column is arranged in the feeding assembly in a penetrating mode; the pressing assembly includes a pressure maintaining piece and a pressure bearing column, the upper end of the pressure bearing column abuts against pressure controllable equipment, the lower end of the pressure bearing column penetrates through the pressure maintaining piece and then abuts against the upper cover, and the pressure controllable equipment drives the upper die assembly to move relative to the feeding assembly through the pressure bearing column so that the lower pressing column can abut against a medium to be crimped; and the pressure maintaining piece is arranged outside the feeding assembly in a sleeving mode and can slide relative to the feeding assembly so that the inner wall of the pressure maintaining piece abuts against the upper cover. The battery production device reduces the production cost and improves the quality of finished products.

The invention discloses a model selection method for dynamic compaction mechanical equipment close to a subway or a tunnel, which comprises the following steps of: firstly, acquiring exploration data of a construction area and an adjacent area through geological exploration, establishing a three-dimensional geological model according to the exploration data, analyzing the pressure stress of an adjacent building / structure, and acquiring a calculated value of the pressure stress of the adjacent building / structure; and checking calculation is carried out according to the prepared dynamic compaction mechanical equipment and the established three-dimensional geological finite element analysis model, and finally the corresponding dynamic compaction mechanical equipment is obtained according to the checking calculation. And the influence or damage of stress damage generated during dynamic compaction on adjacent buildings / structures can be avoided.