CN117621971A - Roadbed filling construction device and construction method - Google Patents

Abstract

The application provides a roadbed filling construction device and a construction method, and relates to the field of roadbed construction. The self-propelled vehicle comprises an unmanned self-propelled vehicle body, wherein the unmanned self-propelled vehicle body comprises a vehicle frame and a vehicle hopper, a hydraulic cylinder for propping the vehicle hopper is arranged on the vehicle frame, a limit groove extending along the vertical direction is formed in the top of one side, close to the vehicle head, of the vehicle hopper, a through groove is formed in the inner wall of one side, close to the vehicle head, of the vehicle hopper, and a containing groove extending along the horizontal direction is formed in the bottom of the inner side of the vehicle hopper; a screw rod and a limiting block are arranged in the limiting groove, the limiting block is adaptively arranged on the screw rod in a rotating mode, the screw rod is driven by a motor, and the outer wall of the limiting block is attached to the inner wall of the limiting groove; the accommodating groove is internally provided with a sliding block, and a steel cable is arranged between the sliding block and the limiting block. The application has the effect that earth can be accomplished fast and the loss of hydraulic equipment is reduced.

Description

Roadbed filling construction device and construction method

Technical Field

The application relates to the field of roadbed construction, in particular to a roadbed filling construction device and a roadbed filling construction method.

Background

The roadbed filling construction is an important link in the road construction process, and the quality of the roadbed filling construction directly influences the service life of a road and the driving safety. Traditional roadbed filling construction mainly depends on manual operation, and comprises the steps of digging, carrying earth, filling earth, compacting and the like. The method has the advantages of high labor intensity and low efficiency, and the construction quality is difficult to guarantee due to the influence of human factors.

Along with the development of technology, the mechanized roadbed filling construction gradually replaces the traditional manual operation. The mechanized roadbed filling construction mainly comprises the steps of digging by an excavator, transporting soil by a dump truck, filling soil by a bulldozer, compacting by a road roller and the like. And along with the development of automation technology, automatic roadbed filling construction gradually becomes a research hot spot. The automatic roadbed filling construction mainly comprises the steps of digging by an unmanned excavator, transporting soil by an unmanned dump truck, filling by an unmanned bulldozer, compacting by an unmanned road roller and the like. The method not only improves the construction efficiency and reduces the labor intensity, but also can better ensure the construction quality due to the adoption of an advanced automatic control technology.

However, the existing automatic roadbed filling construction device and construction method still have some problems, for example, when the unmanned dump truck dumps soil, the soil may adhere in the hopper and cannot be completely unloaded, at this time, the hopper needs to be frequently lifted, and the cleaning and blocking are realized by utilizing the vibration generated when the hopper stops and turns, but the hydraulic equipment or the hopper is easily damaged in such a way.

Disclosure of Invention

In order to solve the problems that the working pressure of hydraulic equipment is too high and the hydraulic equipment is easy to damage when the existing unmanned dump truck dumps soil, the application provides a roadbed filling construction device and a roadbed filling construction method.

In a first aspect, the present application provides a roadbed filling construction device, which adopts the following technical scheme:

the roadbed filling construction device comprises an unmanned dump truck, wherein the unmanned dump truck comprises a frame and a hopper, a hydraulic cylinder used for propping the hopper is arranged on the frame, a limit groove extending along the vertical direction is formed in the top of one side, close to the head, of the hopper, a through groove is formed in the inner wall of one side, close to the head, of the hopper, and a containing groove extending along the horizontal direction is formed in the bottom of the inner side of the hopper;

a screw rod and a limiting block are arranged in the limiting groove, the limiting block is adaptively arranged on the screw rod in a rotating mode, the screw rod is driven by a motor, and the outer wall of the limiting block is attached to the inner wall of the limiting groove;

the accommodating groove is internally provided with a sliding block, and a steel cable is arranged between the sliding block and the limiting block.

Through adopting above-mentioned technical scheme, under the drive of motor and the spacing effect in spacing groove, the stopper can be by the bottom upward movement in spacing groove, at stopper upward movement's in-process, can pull the steel cable upward movement, that is to say, the one end that the steel cable is connected with the stopper upwards moves, the one end horizontal migration that the steel cable is connected with the slider, like this, the steel cable will be changed into incline state by the horizontality, and the in-process that changes at the steel cable position, the steel cable can disturbance and cut the earth of adhesion in the car hopper, ensure that earth can free fall after the car hopper rises, when improving earth unloading efficiency, effectively prevent the damage of car hopper or pneumatic cylinder.

Optionally, the through groove with spacing groove parallel arrangement just with spacing groove intercommunication, the one end of holding groove with spacing groove intercommunication, the other end of holding groove extends to the afterbody of car hopper.

Through adopting above-mentioned technical scheme, at stopper upward moving in-process, the steel cable can slide in logical inslot and change tilt state from the horizontality. The accommodating groove is communicated with the through groove and the limiting groove, so that the steel cable can be fully placed in the accommodating groove when the steel cable is in a horizontal state.

Optionally, the radial cross section of the limiting groove is square, and the limiting block slides up and down in the limiting groove in an adaptive manner.

Through adopting above-mentioned technical scheme, the cooperation of spacing groove and stopper effectively prevents that the stopper from taking place to rotate at the spacing inslot, and be threaded connection's relation between stopper and the lead screw, has ensured to rotate the back at motor drive lead screw, and the stopper can smoothly reciprocate at the spacing inslot.

Optionally, the radial section of the accommodating groove is in a shape of a convex, the sliding block is adaptively clamped in the accommodating groove and slides in the accommodating groove, and the limiting groove and the accommodating groove are in the same plane;

one end of the steel cable is connected with one side of the sliding block, and the other end of the steel cable penetrates through the through groove and is connected with the limiting block.

Through adopting above-mentioned technical scheme, the slider can be in the storage tank internal sliding but unable roll-off storage tank, like this, can realize the back pull effect of slider to the steel cable through the mutual friction between slider and the storage tank, and then ensure that the steel cable can keep the state of tensioning at the in-process of slope, just also ensured that the steel cable can be reliably to the earth in the car hopper disturbance and the cutting.

Optionally, a clamping groove extending along the vertical direction is formed in two side walls of the through groove, clamping strips are adaptively arranged in the clamping groove, the radial cross section of each clamping strip is in a T shape, the vertical ends of the clamping strips are inserted in the clamping groove, one side of the transverse end of each clamping strip is close to the inner wall of the through groove, the other side of the transverse end of each clamping strip is mutually attached to the other side of the transverse end of the corresponding clamping strip, and the steel cable is clamped between the pair of clamping strips.

Through adopting above-mentioned technical scheme, after the horizontal end of two card strips is in the state of laminating each other, lead to the groove and just can be in the closed state, guaranteed that the earth in the car hopper can not enter into in the spacing groove through leading to the groove. When the steel cable moves upwards, the clamping strips at the contact position with the steel cable are separated from each other, and after the steel cable passes through the position, the two clamping strips can be restored to be in a mutually attached state.

Optionally, a distance exists between the end part of the vertical end of the clamping strip and the bottom of the clamping groove;

the clamping strip is internally provided with a cavity, a plurality of magnets are arranged in the cavity at intervals, the outer walls of the magnets are attached to the inner walls of the cavity, and two adjacent magnets in the horizontal direction in a pair of clamping strips are attracted to each other.

Through adopting above-mentioned technical scheme, after the magnet one-to-one in two spacing bars, the card strip of this position can adsorb together reliably, and at the in-process that the steel cable is drawn, two adjacent magnets in the horizontal direction can mutually separate to realized the separation of two card strips in this position, ensured that the steel cable can pass through smoothly. After the steel cable is drawn, the two clamping strips can be mutually adsorbed together again under the action of the magnet, so that the sealing effect of the clamping strips on the through groove is ensured to be reliable.

Optionally, be equipped with the fixed block on the steel cable, the top of fixed block is equipped with the pointed cone piece, the fixed block with steel cable fixed connection just is located in the storage tank, the tip of pointed cone piece upwards sets up and is located the outside of storage tank.

Through adopting above-mentioned technical scheme, at the steel cable by the in-process that the horizontality changed into the inclination, the pointed cone piece can be to the broken effect of adhesion in the car hopper to cooperate with the steel cable, effectively improved the scavenging effect and the scavenging efficiency to the interior earth of car hopper, effectively prevented the damage that the car hopper frequently, quick lift caused.

Optionally, an electric winding roller, a water tank and a traction pipe are arranged on the frame, one end of the traction pipe is communicated with the water tank, and the other end of the traction pipe bypasses the electric winding roller and is connected with the sliding block; the tail of the car hopper is provided with a bend wheel, and the traction pipe is wound on the outer side of the bend wheel.

Through adopting above-mentioned technical scheme, when the stopper upwards removes and drives the steel cable in the spacing inslot, electronic winding roller release traction tube slowly to ensure that the steel cable can be in the state of tightening all the time. The soil adhered in the hopper is convenient to be disturbed and cut.

Optionally, a water cavity is arranged in the sliding block, a plurality of spray heads are arranged on two sides of the sliding block, and the spray heads and the traction pipe are communicated with the water cavity;

the lower part outer wall of slider is equipped with the water tank, the water tank is followed the length direction in holding groove runs through the slider.

Through adopting above-mentioned technical scheme, the water in the water tank pumps into the water cavity through the traction tube, and is spouted outside by water cavity and shower nozzle again to form the cleaning action to the storage tank, prevent that earth from filling in the storage tank. The muddy water moves to the lower part of the hopper through the water passing groove and is discharged to the outer side of the hopper, so that the soil is effectively prevented from being blocked in the accommodating groove.

In a second aspect, the present application provides a method for filling and constructing a roadbed, which adopts the following technical scheme:

a roadbed filling construction method comprises the following steps:

s1, loading soil on a hopper of an unmanned dump truck and automatically advancing to a designated position, wherein a push rod of a hydraulic cylinder extends out to jack the hopper;

s2, the motor acts to enable the screw rod to rotate and drive the limiting block to slide upwards, and the limiting block pulls the steel cable to enable the steel cable to be in an inclined state;

s3, after soil is poured, the water tank pumps water to the traction pipe, and water flow enters the water cavity and is sprayed out from the plurality of spray heads;

s4, the motor acts reversely, the limiting block is driven to reset, the motor acts reversely around the roller, the sliding block is pulled to reset through the traction pipe, and the steel cable is driven to reset into the accommodating groove;

s5, recovering the push rod of the hydraulic cylinder, and enabling the hopper to fall down and reset to finish.

By adopting the technical scheme, soil in the hopper can be rapidly unloaded, and the hopper is ensured to have longer service life.

In summary, the present application includes at least one of the following beneficial effects:

1. the steel cable is pulled upwards through the limiting block and reversely pulled through the sliding block, so that the steel cable can be changed into an inclined state from a horizontal state under the state of keeping taut, and in the process, the steel cable can form disturbance and cutting action on soil, so that the soil adhered in the hopper is promoted to be discharged out of the hopper rapidly, the unloading efficiency of the soil is improved, and the service life of the hopper is prolonged.

2. The water flow is sprayed into the accommodating groove through the spray head, so that the accommodating groove is flushed, soil can not block the accommodating groove, and the steel cable can be reliably reset into the accommodating groove after the soil is unloaded.

Drawings

FIG. 1 is a schematic perspective view of the present application;

FIG. 2 is a schematic perspective view of a second embodiment of the present application;

FIG. 3 is a schematic top view of a hopper;

FIG. 4 is an enlarged schematic view of the structure shown at A in FIG. 3;

FIG. 5 is a schematic perspective view of a hopper;

FIG. 6 is an enlarged schematic view of the structure at B in FIG. 5;

FIG. 7 is a reference view of the hopper lift state;

FIG. 8 is a schematic perspective view of a fixed block and a pointed cone block;

FIG. 9 is a schematic perspective view of a slider;

FIG. 10 is a reference diagram of the connection state of the slider and the wire rope and the traction tube;

FIG. 11 is an exploded view of the card strip;

in the figure: 1. unmanned dump truck;

11. a frame; 111. an electric winding roller; 112. a water tank; 113. a traction tube;

12. a hopper; 121. a limit groove; 122. a through groove; 123. a receiving groove; 124. a clamping groove; 125. a bend wheel;

13. a hydraulic cylinder; 14. a screw rod; 15. a limiting block; 16. a motor;

17. a slide block; 171. a water chamber; 172. a spray head; 173. a water passing tank; 174. a support block;

18. a wire rope; 181. a fixed block; 182. a pointed cone block;

19. clamping strips; 191. a cavity; 192. and (3) a magnet.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-11.

The embodiment discloses a roadbed filling construction device. .

Fig. 1 is a schematic perspective view of the present application, and fig. 2 is a schematic perspective view of the present application. Referring to fig. 1 and 2, a roadbed filling construction device comprises an unmanned dumper 1, wherein the unmanned dumper 1 comprises a frame 11 and a hopper 12, a hydraulic cylinder 13 is arranged on the frame 11, one end of the hopper 12 is hinged on the frame 11, and the other end of the hopper 12 can be lifted upwards under the driving of the hydraulic cylinder 13, so that the soil is unloaded from the hopper 12.

Fig. 3 is a schematic plan view of the hopper, and fig. 4 is an enlarged schematic structural view at a in fig. 3. Referring to fig. 3 and 4, a limiting groove 121 is formed in the top of one side, close to the vehicle head, of the vehicle hopper 12, a through groove 122 is further formed in the side wall, the limiting groove 121 and the through groove 122 extend along the height direction of the vehicle hopper 12, and the limiting groove 121 and the through groove 122 are mutually communicated. The limiting groove 121 is internally provided with a limiting block 15 and a screw rod 14, the screw rod 14 and the limiting groove 121 are coaxially arranged and driven by the motor 16, the limiting block 15 and the screw rod 14 are connected through threads (namely, the limiting block 15 is provided with a threaded hole, the screw rod 14 is adaptively arranged in the threaded hole in a penetrating mode), one side top of the car hopper 12, which is close to the car head, is also provided with the motor 16, and an output shaft of the motor 16 is connected with the screw rod 14, so that the screw rod 14 can rotate under the driving of the motor 16.

When the hydraulic cylinder 13 drives the frame 11 to rotate in place, but soil still adheres to the hopper 12, the motor 16 starts to act and drives the screw rod 14 to rotate, and due to the threaded connection between the screw rod 14 and the limiting block 15, the cross section of the limiting groove 121 is square, and the outer wall of the limiting block 15 and the inner wall of the limiting groove 121 enable the limiting block 15 to only move upwards in the vertical direction in the limiting groove 121 after the screw rod 14 rotates (the limiting block 15 cannot rotate in the process).

Fig. 5 is a schematic perspective view of the hopper, and fig. 6 is an enlarged schematic structural view at B in fig. 5. Referring to fig. 5 and 6, a receiving groove 123 is provided at the bottom of the inner side of the hopper 12, the receiving groove 123 extends along the length direction of the hopper 12, one end of the receiving groove 123 is communicated with the through groove 122 and the limit groove 121, and the other end of the receiving groove 123 is communicated with the tail of the hopper 12 (i.e. the limit groove 121 and the receiving groove 123 are in the same plane and form an L-shaped groove body). The radial cross section of the accommodating groove 123 is in a convex shape, a sliding block 17 is adaptively arranged in the accommodating groove 123, and the sliding block 17 can slide in the accommodating groove 123 but cannot move to the outer side of the accommodating groove 123.

Fig. 7 is a reference diagram of the hopper lift state. Referring to fig. 7 in combination with fig. 2 and 3, a wire rope 18 is provided between the slider 17 and the stopper 15, and when the stopper 15 is moved upward in the stopper groove 121 by the motor 16, the end of the wire rope 18 connected to the stopper 15 is moved upward, so that the other end of the wire rope 18 forms a pulling action on the slider 17, thereby converting the wire rope 18 from a horizontal state to an inclined state. In the process of changing the position state of the steel cable 18, the disturbance and cutting action on the residual soil in the hopper 12 can be formed, so that the steel cable 18 is promoted to slide down from the hopper 12, the soil is thoroughly unloaded, the hydraulic cylinder 13 does not need to be repeatedly stretched and contracted, and the hydraulic cylinder 13 cannot be damaged.

Fig. 8 is a schematic perspective view of the fixed block and the pointed cone block. Referring to fig. 8 in combination with fig. 3, a plurality of fixing blocks 181 are provided on the steel cable 18, a pointed cone block 182 is provided at the top of the fixing blocks 181, when the steel cable 18 is located in the accommodating groove 123, the fixing blocks 181 are located in the accommodating groove 123, and the pointed cone block 182 is located outside the accommodating groove 123, and the fixing blocks 181 can freely enter and exit the accommodating groove 123, so that the fixing blocks 181 move to the outer side of the accommodating groove 123 and generate displacement in the hopper 12 in the process of moving and tilting the steel cable 18, and thus, the pointed cone block 182 can generate a crushing effect on soil in the hopper 12, thereby improving the disturbance effect on the soil, and ensuring that the soil in the hopper 12 can be completely unloaded after the steel cable 18 reaches the maximum tilting state. Further, in order to enhance the disturbance and cutting effect on soil, the receiving groove 123 may be disposed as close to the sidewall of the hopper 12 as possible.

Referring to fig. 2 and 4, an electric winding roller 111, a water tank 112 and a traction tube 113 are arranged on the frame 11, a bend pulley 125 is arranged at the tail of the hopper 12, one end of the traction tube 113 is communicated with the water tank 112, the other end of the traction tube 113 is wound on the electric winding roller 111 for a plurality of circles, and then is bent upwards under the bend effect of the bend pulley 125 and is connected with a sliding block 17 in a containing groove 123. When the limiting block 15 pulls one end of the steel cable 18 to ascend, the traction tube 113 can be slowly released by the electric winding roller 111, so that the traction tube 113 can realize the counter-pulling action on the sliding block 17, and the steel cable 18 can be kept in a tight state, and the disturbance and cutting effect on soil are improved.

Fig. 9 is a schematic perspective view of the slider, and fig. 10 is a reference view of the connection state of the slider to the wire rope and the pulling tube. Referring to fig. 9 and 10 in combination with fig. 6, after the wire rope 18 is inclined and the soil is completely unloaded from the hopper 12, if the soil remains in the receiving groove 123, the water in the water tank 112 is pumped into the traction tube 113 (i.e., the water tank 112 is provided with a water pump, which is a conventional technique and is not shown). The water cavity 171 is arranged in the sliding block 17, water in the traction pipe 113 can be pumped into the water cavity 171, a plurality of spray heads 172 are arranged on two sides of the sliding block 17, and the spray heads 172 are communicated with the water cavity 171, so that water in the water tank 112 can be sprayed out from the spray heads 172 after being pumped into the water cavity 171, and the flushing effect on the accommodating groove 123 is realized.

The plurality of spray nozzles 172 positioned at the same side of the slider 17 are disposed at intervals in the height direction, and the spray nozzle 172 positioned at the lower portion of the slider 17 is inclined downward, and the spray nozzle 172 positioned at the upper portion of the slider 17 is maintained in a state parallel to the accommodating groove 123, so that the accommodating groove 123 can be rinsed better after the water in the water chamber 171 is sprayed from the spray nozzle 172, and can be discharged from the accommodating groove 123 after the rinsing is completed. Further, a plurality of water passing grooves 173 are formed in the outer wall of the slider 17, and the water passing grooves 173 penetrate the slider 17 along the length direction of the accommodating groove 123, so that the muddy water can flow downwards through the water passing grooves 173 (at this time, the hopper 12 is still kept in a lifted state) and is discharged from the accommodating groove 123, and the steel cable 18 is ensured to be completely placed in the accommodating groove 123 after being reset to a horizontal state.

The outer wall of the sliding block 17 is provided with a plurality of hemispherical supporting blocks 174, and the supporting blocks 174 are positioned on the outer wall of the sliding block 17 extending in the horizontal direction, so that when the steel cable 18 inclines and the sliding block 17 is pulled obliquely, the supporting blocks 174 can be reliably attached to the inner wall of the accommodating groove 123, the effect of reducing friction force is achieved, the sliding block 17 is ensured to be capable of displacing under the pulling of the steel cable 18, and the horizontal state is changed to the inclined state by being matched with the steel cable 18.

Fig. 11 is an exploded view of the card strip. Referring to fig. 11 in combination with fig. 4, a slot 124 extending in the vertical direction is formed on both sidewalls of the through slot 122, that is, the through slot 122 and the two slots 124 can form a cross-shaped slot body. The clamping strips 19 are inserted into the clamping grooves 124 in an adaptive manner, the radial cross sections of the clamping strips 19 are T-shaped, so that the vertical ends of the clamping strips 19 are inserted into the clamping grooves 124 and are spaced from the bottoms of the clamping grooves 124, the transverse ends of the clamping strips 19 are positioned in the through grooves 122, and the transverse ends of the two clamping strips 19 are mutually attached. Further, a cavity 191 penetrating the clamping strip 19 along the vertical direction is arranged in the clamping strip 19, a plurality of T-shaped magnets 192 are arranged in the cavity 191 at intervals, and the outer walls of the magnets 192 are attached to the inner walls of the cavity 191. The magnets 192 in the two clamping strips 19 are arranged in one-to-one correspondence, namely, the arrangement intervals of the magnets 192 in the two clamping strips 19 are identical, and the heights of the two magnets 192 at the uppermost part are also identical, so that the magnets 192 in the two clamping strips 19 are in a state of being attracted in pairs, and the bonding compactness between the two clamping strips 19 is improved.

The steel cable 18 is clamped between the pair of clamping bars 19, when one end of the clamping bars 19 is driven by the limiting block 15 to move upwards, two adjacent magnets 192 on the two clamping bars 19 close to the steel cable 18 are separated, the clamping bars 19 move towards the bottom of the clamping groove 124 at the position, after the steel cable 18 is scratched, the two adjacent magnets 192 are attracted together again, so that the clamping bars 19 are attached again at the position, that is, the steel cable 18 can slide between the pair of clamping bars 19 smoothly under the cooperation of the magnets 192, and in the sliding process of the steel cable 18, the joint part of the pair of clamping bars 19 and the steel cable 18 can be opened and compounded in a self-adaptive manner, so that the through groove 122 is closed to the greatest extent through the pair of clamping bars 19, the fact that soil in the car hopper 12 cannot enter the limiting groove 121 through the through groove 122 is ensured, and the lead screw 14 and the limiting block 15 can be in a reliable working state and the driving effect on the steel cable 18 is ensured.

The embodiment also discloses a roadbed filling construction method.

A roadbed filling construction method comprises the following steps:

s1, loading soil on a hopper 12 of the unmanned dump truck 1 and automatically advancing to a designated position, and pushing out a push rod of a hydraulic cylinder 13 to jack up the hopper 12 so as to realize automatic unloading of the soil;

s2, the motor 16 acts to enable the screw rod 14 to rotate and drive the limiting block 15 to slide upwards, and the limiting block 15 pulls the steel cable 18 to enable the steel cable 18 to be in an inclined state and to be kept in a tight state under the traction action of the traction pipe 113;

s3, after the soil is poured, the water tank 112 pumps water to the traction pipe 113, and water flows into the water cavity 171 and is sprayed out from the plurality of spray heads 172, so that the accommodating groove 123 is cleaned;

s4, the motor 16 acts reversely, the limiting block 15 is driven to reset, the electric winding roller 111 acts reversely, the traction tube 113 pulls the sliding block 17 to reset, and the steel cable 18 is driven to reset into the accommodating groove 123;

s5, recovering the push rod of the hydraulic cylinder 13, and dropping and resetting the hopper 12 to finish.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. The roadbed filling construction device comprises an unmanned dump truck (1), wherein the unmanned dump truck (1) comprises a frame (11) and a hopper (12), a hydraulic cylinder (13) for propping the hopper (12) is arranged on the frame (11), and the roadbed filling construction device is characterized in that a limit groove (121) extending along the vertical direction is formed in the top of one side, close to the head, of the hopper (12), a through groove (122) is formed in the inner wall, close to the head, of the hopper (12), and a containing groove (123) extending along the horizontal direction is formed in the bottom of the inner side of the hopper (12);

a screw rod (14) and a limiting block (15) are arranged in the limiting groove (121), the limiting block (15) is adaptively arranged on the screw rod (14) in a rotating mode, the screw rod (14) is driven by a motor (16), and the outer wall of the limiting block (15) is attached to the inner wall of the limiting groove (121);

a sliding block (17) is arranged in the accommodating groove (123), and a steel cable (18) is arranged between the sliding block (17) and the limiting block (15).

2. The roadbed filling construction device according to claim 1, wherein the through groove (122) is arranged in parallel with the limit groove (121) and is communicated with the limit groove (121), one end of the accommodating groove (123) is communicated with the limit groove (121), and the other end of the accommodating groove (123) extends to the tail of the car hopper (12).

3. The roadbed filling construction device according to claim 1, wherein the radial cross section of the limit groove (121) is square, and the limit block (15) slides up and down in the limit groove (121) in an adaptive manner.

4. The roadbed filling construction device according to claim 2, wherein the radial section of the accommodating groove (123) is in a convex shape, the sliding block (17) is adaptively clamped in the accommodating groove (123) and slides in the accommodating groove (123), and the limiting groove (121) and the accommodating groove (123) are in the same plane;

one end of the steel cable (18) is connected with one side of the sliding block (17), and the other end of the steel cable (18) passes through the through groove (122) and is connected with the limiting block (15).

5. The roadbed filling construction device according to claim 4, wherein two side walls of the through groove (122) are provided with a clamping groove (124) extending along the vertical direction, clamping bars (19) are adaptively arranged in the clamping groove (124), the radial cross section of each clamping bar (19) is in a T shape, the vertical end of each clamping bar (19) is inserted into the corresponding clamping groove (124), one side of the transverse end of each clamping bar (19) is close to the inner wall of the through groove (122), the other side of the transverse end of one clamping bar (19) is mutually attached to the other side of the transverse end of the other clamping bar (19), and the steel cable (18) is clamped between the pair of clamping bars (19).

6. The roadbed filling construction device according to claim 5, wherein a distance exists between the vertical end part of the clamping strip (19) and the bottom of the clamping groove (124);

the clamping strips (19) are internally provided with cavities (191), a plurality of magnets (192) are arranged in the cavities (191) at intervals, the outer walls of the magnets (192) are attached to the inner walls of the cavities (191), and two magnets (192) adjacent to each other in the horizontal direction in the pair of clamping strips (19) are attracted to each other.

7. The roadbed filling construction device according to claim 4, wherein a fixing block (181) is arranged on the steel cable (18), a pointed cone block (182) is arranged at the top of the fixing block (181), the fixing block (181) is fixedly connected with the steel cable (18) and is located in the accommodating groove (123), and the tip of the pointed cone block (182) is upwards arranged and is located outside the accommodating groove (123).

8. The roadbed filling construction device according to claim 4, wherein the frame (11) is provided with an electric winding roller (111), a water tank (112) and a traction pipe (113), one end of the traction pipe (113) is communicated with the water tank (112), and the other end of the traction pipe (113) bypasses the electric winding roller (111) and is connected with the sliding block (17); the tail of the car hopper (12) is provided with a bend wheel (125), and the traction pipe (113) is wound on the outer side of the bend wheel (125).

9. The roadbed filling construction device according to claim 8, wherein a water cavity (171) is arranged in the sliding block (17), a plurality of spray heads (172) are arranged on two sides of the sliding block (17), and the spray heads (172) and the traction pipe (113) are communicated with the water cavity (171);

the lower outer wall of the sliding block (17) is provided with a water passing groove (173), and the water passing groove (173) penetrates through the sliding block (17) along the length direction of the accommodating groove (123).

10. The roadbed filling construction method is characterized by comprising the following steps of:

s1, loading soil on a hopper (12) of an unmanned dump truck (1) and automatically advancing to a designated position, wherein a push rod of a hydraulic cylinder (13) extends out to jack up the hopper (12);

s2, the motor (16) acts to enable the screw rod (14) to rotate and drive the limiting block (15) to slide upwards, and the limiting block (15) pulls the steel cable (18) to enable the steel cable (18) to be in an inclined state;

s3, after soil is poured, the water tank (112) pumps water to the traction pipe (113), and water flows into the water cavity (171) and is sprayed out from the plurality of spray heads (172);

s4, the motor (16) acts reversely, the limiting block (15) is driven to reset, the electric winding roller (111) acts reversely, the traction tube (113) pulls the sliding block (17) to reset, and the steel cable (18) is driven to reset into the accommodating groove (123);

s5, recovering the push rod of the hydraulic cylinder (13), and enabling the hopper (12) to fall down and reset to finish.