CN115852807A

CN115852807A - A earthwork transshipment bridge for big foundation ditch

Info

Publication number: CN115852807A
Application number: CN202211403043.5A
Authority: CN
Inventors: 王伟华; 秦建友
Original assignee: Weifang Yixin Engineering Project Management Co ltd
Current assignee: Weifang Yixin Engineering Project Management Co ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-03-28

Abstract

The invention discloses an earthwork transfer bridge for a large foundation pit, which comprises symmetrically arranged bridge bodies, wherein each bridge body comprises symmetrically arranged lower beam frames, a plurality of triangular steel frames are arranged above the lower beam frames, the tops of the triangular steel frames are fixedly connected with an upper beam frame, the lower beam frames of the two bridge bodies are connected through a connecting mechanism, an elevator bucket is arranged between the two bridge bodies, two sides of the elevator bucket are connected with an elevator mechanism through steel ropes, the elevator mechanism is fixedly arranged at one end, close to the connecting mechanism, of the upper beam frame, upright columns are further symmetrically and fixedly arranged between the lower beam frames and the upper beam frames, the upright columns are fixedly arranged at one ends, close to the connecting mechanism, of the lower beam frames and the upper beam frames, and guide mechanisms are fixedly arranged between the upright columns. The distance between the two bridge bodies is adjustable, so that the two bridge bodies can be conveniently erected on foundation pits with different spans, meanwhile, the lifting bucket and the lifting mechanism are convenient to dump the supporting plates on the two sides, the earthwork transferring efficiency is improved, in addition, the arrangement of the material guide mechanism can prevent earthwork from scattering, and meanwhile, the service life of the material guide mechanism is prolonged.

Description

A earthwork transshipment bridge for big foundation ditch

Technical Field

The invention relates to the technical field of building construction, in particular to an earthwork transfer bridge for a large foundation pit.

Background

The earth excavation mode of the deep foundation pit engineering mainly comprises basin excavation and island excavation, wherein the basin excavation mode is more common. The pot type excavation is to excavate the earthwork in the middle of the foundation pit firstly, reserve four sides of the surrounding back pressure soil according to a certain safe gradient, and the foundation pit is similar to a basin at the moment. And after the middle earthwork excavation is finished and the middle foundation slab is finished, additionally arranging a support structure according to needs and having peripheral earthwork excavation conditions, and excavating peripheral slopes. The difficulty of the basin type excavation mode is excavation of basin edge soil, and when the basin edge soil is excavated, the middle structure is complete, and earthwork is not suitable to be transported from the middle constructed structure so as to avoid damaging the middle structure which is just constructed. And when basin limit soil excavation, foundation ditch bearing structure has been under construction, makes the peripheral construction space of foundation ditch narrow and small, is unfavorable for large-scale mechanical operation.

Generally, a construction trestle is arranged above the periphery of a foundation pit in consideration of foundation pit enclosure design, an earthwork grabbing machine is adopted to vertically fetch earth to a trestle platform, and an earthwork vehicle parked on the trestle transports the earth out. However, the construction trestle is high in manufacturing cost and occupies the construction period, and the basin-side soil body is excavated into a difficulty for a foundation pit without the trestle. At present, adopt the good steel construction earthwork of welding to transport the bridge in addition and carry out the foundation ditch earthwork and transport, but the size of this kind of earthwork transport bridge should not be too big, otherwise remove to erect inconveniently, length can not adjust simultaneously, only is fit for the less foundation ditch of span.

Disclosure of Invention

The invention aims to provide an earthwork transfer bridge for a large foundation pit, two bridge bodies of the earthwork transfer bridge are connected through a connecting mechanism, a lower beam frame is driven by a first motor to slide along a sliding sleeve, so that the distance between the two bridge bodies is adjusted, the earthwork transfer bridge is convenient to erect on foundation pits with different spans, meanwhile, a lifting bucket and a lifting mechanism are arranged, so that supporting plates on two sides can be conveniently inclined, the earthwork transfer efficiency is improved, in addition, the earthwork can be prevented from being scattered due to the arrangement of a material guide mechanism, and meanwhile, the service life of the material guide mechanism is prolonged.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides an earthwork transfer bridge for big foundation ditch, the pontic that sets up including the symmetry, the pontic includes the lower beam structure that the symmetry set up, fixed mounting backup pad between the lower beam structure, a plurality of triangle steelframes of lower beam structure top symmetry fixed mounting, three angle steelframes set up along the even equidistance of lower beam structure length direction, three angle steelframe top fixed connection upper beam structure, link to each other through coupling mechanism between the lower beam structure of two pontics, the pontic horizontal slip of coupling mechanism drive both sides, be equipped with the elevator bucket between two pontics, the elevator bucket both sides link to each other with hoist mechanism through the steel cable, hoist mechanism fixed mounting is close to coupling mechanism one end at the upper beam structure, still symmetry fixed mounting stand between lower beam structure and the upper beam structure, stand fixed mounting is close to coupling mechanism one end at lower beam structure and upper beam structure, fixed mounting guide mechanism between the stand.

Further preferably, coupling mechanism includes the sliding sleeve, the sliding sleeve is run through to the one end of underbeam frame, underbeam frame and sliding sleeve sliding connection, sliding sleeve outer wall fixed mounting drive box, run through in the drive box and be equipped with first drive shaft, first drive shaft rotates with the drive box to be connected, there is not the output shaft fixed connection of first drive shaft one end and first motor, the sliding sleeve is close to drive box one side inner wall symmetry fixed drive gear, drive gear rotates with the sliding sleeve inner wall to be connected, drive gear's pivot passes through bevel gear pair and meshes with first drive shaft, the underbeam frame is close to drive box one side outer wall fixed mounting rack, the rack meshes with drive gear.

Further preferably, the lift bucket comprises a bottom plate, side plates are symmetrically and fixedly installed on two sides of the bottom plate, baffle plates are symmetrically fixed between the side plates, and the side wall of the upper end of each baffle plate is rotatably connected with the side plates.

Further preferably, hoist mechanism is including running through the rolling axle that sets up between the stand, the rolling axle level sets up in guide mechanism top, the rolling axle rotates with the stand of both sides and is connected, the rolling axle both ends are passed through the belt and are connected with the second drive axle, the second drive axle rotates with the axle bed and is connected, axle bed fixed mounting is at last roof beam frame top, the one end that the belt pulley was kept away from to the second drive axle links to each other with the output of derailleur, the input of derailleur links to each other with the output shaft of second motor, second motor fixed mounting is at last roof beam frame top, the surface symmetry of rolling axle sets up the rolling wheel, steel cable one end is encircleed and is set up on the rolling wheel surface, the steel cable other end is fixed with the elevator bucket.

Further preferably, the guide mechanism is including setting up the stock guide between the stand, the stock guide both ends are rotated with first slider and are connected, vertical first slide opening has been seted up on the stand, it is equipped with first guide bar to vertically run through in the first slide opening, first slider is run through to first guide bar upper end, first slider and first guide bar sliding connection, first spring is established to first guide bar surface cover between first slider bottom and the first slide opening bottom, the pivot of stock guide passes through the belt and is connected with the output shaft of third motor, third motor fixed mounting is at the stand lateral wall, be provided with straining device on the driving belt of stock guide.

Further preferably, the side wall of the upper end of the material guide plate is symmetrically fixed with first pull rods, one end of each first pull rod is rotatably connected with the side wall of the material guide plate, the other end of each first pull rod is rotatably connected with a second pull rod, and one end, far away from the first pull rod, of the second pull rod is rotatably connected with the side wall of the upper end of the first sliding block.

Further preferably, the tensioning assembly comprises a fixed block, the fixed block is fixedly mounted on the outer wall of the stand column between the guide plate rotating shaft and the third motor output shaft, a second sliding hole is formed in the middle of the fixed block in a penetrating mode, a second guide rod is arranged inside the second sliding hole in a penetrating mode, a second sliding block is arranged on the second guide rod and is connected with the second guide rod in a sliding mode, one side, far away from the stand column, of the second sliding block is connected with the second sliding hole through a second spring, the second spring is sleeved on the surface of the second guide rod, a tensioning wheel is mounted on the second sliding block and is connected with the second sliding block in a rotating mode, and a driving belt of the guide plate penetrates through the tensioning wheel.

Further preferably, the lower beam frame is provided with an inclined plate in the middle of the end far away from the connecting mechanism, the inclined plate is close to one end of the supporting plate and is connected with the lower beam frame in a rotating mode, the upper end of the inclined plate is flushed with the supporting plate, the outer side wall of the lower beam frame corresponds to the symmetrical fixed mounting supporting seat at the position of the inclined plate, the supporting column is provided with a supporting rod in a penetrating mode, the supporting rod is connected with the supporting column in a rotating mode, and rollers are fixedly mounted at the bottom of the lower beam frame.

The invention has the beneficial effects that:

the two bridge bodies of the earthwork transfer bridge are connected through the connecting mechanism, and the lower beam frame is driven by the first motor to slide along the sliding sleeve, so that the distance between the two bridge bodies is adjusted, and the earthwork transfer bridge is convenient to erect on foundation pits with different spans. According to the invention, the hoisting mechanism drives the winding wheel to rotate through the second motor so as to drive the steel rope to wind, so that the hoisting hopper fixed at the other end of the steel rope is lifted, the hoisting mechanisms at two sides work synchronously, the hoisting hopper can keep horizontal lifting, and after the hoisting hopper is lifted to a blanking position, the hoisting mechanism at one side can work continuously to drive the hoisting hopper to incline towards the other side, so that earth in the hopper is dumped conveniently and quickly. The elevator bucket is directly inclined between the two bridge bodies, earthwork on the elevator bucket cannot fall onto a transfer trolley on the supporting plate, so that the earthwork needs to be buffered by the material guide plate, the material guide plate can be impacted by the earthwork when the earthwork falls, two ends of the material guide plate are fixed with the first slide block, and the bottom of the first slide block is connected with the bottom of the first slide hole through the first spring, so that the impact of the earthwork on the material guide plate can be effectively reduced, the abrasion to a rotating shaft of the material guide plate is reduced, and the service life of the material guide mechanism is prolonged. The tensioning assembly arranged on the guide plate driving belt can keep the belt in a tensioning state when the guide plate moves up and down, and can keep the guide plate to maintain a corresponding angle by being matched with the pull rod at the upper end of the guide plate.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of an earthwork transfer bridge for a large foundation pit according to the present invention;

FIG. 2 is a cross-sectional view of the present invention at the earthwork transfer bridge attachment mechanism for a large foundation pit;

FIG. 3 is a schematic structural view of an earthwork transfer bridge lift hopper and a lifting mechanism for a large foundation pit according to the present invention;

FIG. 4 is a schematic structural view of a material guide mechanism of an earthwork transfer bridge for a large foundation pit according to the present invention;

FIG. 5 is an enlarged view of the position A of FIG. 4 according to the present invention;

fig. 6 is a schematic structural diagram of the lower beam frame of the earth transfer bridge for the large foundation pit.

In the figure: 1-bridge body, 2-lower beam frame, 3-support plate, 4-triangular steel frame, 5-upper beam frame, 6-connecting mechanism, 7-lifting bucket, 8-steel rope, 9-lifting mechanism, 10-upright column, 11-guide mechanism, 12-sliding sleeve, 13-drive box, 14-first drive shaft, 15-first motor, 16-drive gear, 17-rack, 18-bottom plate, 19-side plate, 20-baffle plate, 21-winding shaft, 22-second drive shaft, 23-shaft seat, 24-speed changer, 25-second motor, 26-winding wheel, 27-guide plate, 28-first sliding block, 29-first sliding hole, 30-first guide rod, 31-first spring, 32-third motor, 33-tensioning mechanism, 34-first pull rod, 35-second pull rod, 36-fixed block, 37-second sliding hole, 38-second guide rod, 39-second sliding block, 40-second spring, 41-inclined plate, 41-support rod, 42-support rod, 43-support seat, and 45-tensioning wheel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, an earthwork transfer bridge for a large foundation pit includes a bridge body 1 symmetrically disposed, the bridge body 1 includes a lower beam frame 2 symmetrically disposed, a support plate 3 is fixedly mounted between the lower beam frames 2, a plurality of triangular steel frames 4 are symmetrically and fixedly mounted above the lower beam frame 2, the triangular steel frames 4 are uniformly and equidistantly disposed along the length direction of the lower beam frame 2, an upper beam frame 5 is fixedly connected to the top of the triangular steel frame 4, the lower beam frames 2 of the two bridge bodies 1 are connected through a connecting mechanism 6, the connecting mechanism 6 drives the bridge bodies 1 at two sides to horizontally slide, a lifting bucket 7 is disposed between the two bridge bodies 1, two sides of the lifting bucket 7 are connected with a lifting mechanism 9 through steel ropes 8, the lifting mechanism 9 is fixedly mounted at one end of the upper beam frame 5 close to the connecting mechanism 6, upright columns 10 are also symmetrically and fixedly mounted between the lower beam frame 2 and the upper beam frame 5, the upright columns 10 are fixedly mounted at one ends of the lower beam frame 2 and the upper beam frame 5 close to the connecting mechanism 6, and guide mechanisms 11 are fixedly mounted between the upright columns 10.

The connecting mechanism 6 comprises a sliding sleeve 12, one end of the lower beam frame 2 penetrates through the sliding sleeve 12, the lower beam frame 2 is in sliding connection with the sliding sleeve 12, a driving box 13 is fixedly installed on the outer wall of the sliding sleeve 12, a first driving shaft 14 penetrates through the driving box 13, the first driving shaft 14 is in rotating connection with the driving box 13, one end of the first driving shaft 14 is not fixedly connected with an output shaft of a first motor 15, the sliding sleeve 12 is close to a driving gear 16 symmetrically fixed on the inner wall of one side of the driving box 13, the driving gear 16 is in rotating connection with the inner wall of the sliding sleeve 12, a rotating shaft of the driving gear 16 is meshed with the first driving shaft 14 through a bevel gear pair, a rack 17 is fixedly installed on the outer wall of one side of the lower beam frame 2 close to the driving box 13, and the rack 17 is meshed with the driving gear 16.

The connecting mechanism 6 is arranged between the two bridge bodies 1, the first driving shaft 14 is driven to rotate through the first motor 15, the first driving shaft 14 drives the two driving gears 16 to rotate, and the rack 17 is meshed with the driving gears 16, so that the driving gears 16 can drive the lower beam frame 2 to slide along the sliding sleeve 12 when rotating, the distance between the two bridge bodies 1 is adjusted, and the bridge is convenient to erect on foundation pits with different spans.

The lifting bucket 7 comprises a bottom plate 18, side plates 19 are symmetrically and fixedly arranged on two sides of the bottom plate 18, baffle plates 20 are symmetrically and fixedly arranged between the side plates 19, and the side walls of the upper ends of the baffle plates 20 are rotatably connected with the side plates 19. Baffle 20 and the curb plate 19 of lift-bucket 7 both sides rotate the setting, and baffle 20's pivot department can set up the torsional spring or adopt the damping pivot simultaneously for baffle 20 can block the earthwork in the fill and drop when bottom plate 18 is horizontal, and when needs were emptyd the earthwork, the different messenger lift-bucket 7 slopes of length through the hoist mechanism 9 control steel cable 8 of both sides, can make baffle 20 rotate like this under the gravity of earthwork, makes the earthwork in the fill fall from the space of baffle 20 below.

Hoist mechanism 9 is including running through the rolling axle 21 that sets up between stand 10, rolling axle 21 level sets up in guide mechanism 11 top, rolling axle 21 rotates with the stand 10 of both sides to be connected, rolling axle 21 both ends are passed through the belt and are connected with second drive shaft 22, second drive shaft 22 rotates with axle bed 23 to be connected, axle bed 23 fixed mounting is at last roof beam structure 5 top, the one end that the belt pulley was kept away from to second drive shaft 22 links to each other with the output of derailleur 24, the input of derailleur 24 links to each other with the output shaft of second motor 25, second motor 25 fixed mounting is at last roof beam structure 5 top, rolling axle 21 surface symmetry sets up

rolling wheel

26, 8 one end of steel cable is encircleed and is set up on rolling wheel 26 surface, 8 other ends of steel cable are fixed with lifting hopper 7.

According to the lifting mechanism, the second motor 25 drives the second driving shaft 22 to rotate, the second driving shaft 22 drives the winding shaft 21 to rotate through the belt, one end of the steel rope 8 is arranged on the surface of the winding wheel 26 in a surrounding mode, the winding wheel 26 fixed on the winding shaft 21 rotates to drive the steel rope 8 to wind, and therefore the lifting bucket 7 fixed to the other end of the steel rope 8 is lifted. The lifting mechanisms 9 on the two sides work synchronously, so that the lifting bucket 7 can be kept horizontal, and after the lifting bucket 7 is lifted to the blanking position, the lifting mechanism 9 on one side can work continuously to drive the lifting bucket 7 to incline to the other side, so that earthwork in the bucket is dumped.

The material guiding mechanism 11 includes a material guiding plate 27 disposed between the vertical columns 10, two ends of the material guiding plate 27 are rotatably connected to the first sliding block 28, a first vertical sliding hole 29 is formed in the vertical sliding column 10, a first guiding rod 30 vertically penetrates through the first sliding hole 29, the first sliding block 28 penetrates through the upper end of the first guiding rod 30, the first sliding block 28 is slidably connected to the first guiding rod 30, a first spring 31 is sleeved on the surface of the first guiding rod 30 between the bottom of the first sliding block 28 and the bottom of the first sliding hole 29, a rotating shaft of the material guiding plate 27 is connected to an output shaft of a third motor 32 through a belt, the third motor 32 is fixedly mounted on a side wall of the vertical column 10, and a tensioning mechanism 33 is disposed on a driving belt of the material guiding plate 27.

The material guiding mechanism 11 of the invention is arranged on the upright post 10, when the earthwork is dumped, the material guiding plate 27 is driven to rotate by the third motor, so that the material guiding plate 27 is inclined, the earthwork which falls from the elevator bucket 7 falls onto the material guiding plate 27 firstly and then falls off from the material guiding plate 27, the purpose is that the elevator bucket 7 is directly inclined between the two bridge bodies 1, the earthwork on the elevator bucket 7 can not be dumped onto the transfer trolley on the supporting plate 3, and therefore the material guiding plate 27 is needed. Meanwhile, the material guide plate 27 has a certain buffering effect, earthwork can impact the material guide plate 27 when falling down, two ends of the material guide plate 27 are fixed to the first slide block 28, and the bottom of the first slide block 28 is connected to the bottom of the first slide hole 29 through the first spring 31, so that impact of earthwork on the material guide plate 27 can be effectively reduced, abrasion to a rotating shaft of the material guide plate 27 is reduced, and the service life of the material guide mechanism 11 is prolonged.

The side wall of the upper end of the material guide plate 27 is symmetrically fixed with a first pull rod 34, one end of the first pull rod 34 is rotatably connected with the side wall of the material guide plate 27, the other end of the first pull rod 34 is rotatably connected with a second pull rod 35, and one end of the second pull rod 35 far away from the first pull rod 34 is rotatably connected with the side wall of the upper end of the first slide block 28.

The tensioning assembly 33 comprises a fixing block 36, the fixing block 36 is fixedly installed on the outer wall of the upright post 10 between the rotating shaft of the material guide plate 27 and the output shaft of the third motor 32, a second sliding hole 37 is horizontally arranged in the middle of the fixing block 36 in a penetrating manner, a second guide rod 38 is arranged in the second sliding hole 37 in a penetrating manner, a second sliding block 39 is arranged on the second guide rod 38, the second sliding block 39 is connected with the second guide rod 38 in a sliding manner, one side, far away from the upright post 10, of the second sliding block 39 is connected with the second sliding hole 37 through a second spring 40, the second spring 40 is sleeved on the surface of the second guide rod 38, a tensioning wheel 45 is installed on the second sliding block 39, the tensioning wheel 45 is rotatably connected with the second sliding block 39, and a driving belt of the material guide plate 27 penetrates through the tensioning wheel 45.

The tension assembly 33 disposed on the belt driven by the material guiding plate 27 can keep the belt in a tension state when the material guiding plate 27 moves up and down, and can keep the material guiding plate 27 at a corresponding angle by matching with the pull rod at the upper end of the material guiding plate 27.

The lower beam frame 2 is far away from the middle of the one end of the connecting mechanism 6 and is provided with a sloping plate 41, the sloping plate 41 is close to one end of the support plate 3 and is connected with the lower beam frame 2 in a rotating mode, the upper end of the sloping plate 41 is flush with the support plate 3, the outer side wall of the lower beam frame 2 corresponds to the symmetrical fixed mounting support seats 42 at the position of the sloping plate 41, the support columns 42 are provided with support rods 43 in a penetrating mode, the support rods 43 are connected with the support columns 42 in a rotating mode, and rollers 44 are fixedly mounted at the bottom of the lower beam frame 2. The gentle slope formed by the sloping plates 41 is convenient for the transfer vehicle to move up and down the supporting plates 3, the rollers 44 are convenient for the earthwork transfer bridge to move, and the supporting rods 43 and the supporting columns 42 can be kept stable after the earthwork transfer bridge is erected.

The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.

Claims

1. The utility model provides an earthwork transport bridge for big foundation ditch which characterized in that: bridge (1) that sets up including the symmetry, bridge (1) is including lower roof beam structure (2) that the symmetry set up, fixed mounting backup pad (3) between lower roof beam structure (2), a plurality of triangular steel frame (4) of symmetry fixed mounting in lower roof beam structure (2) top, triangular steel frame (4) set up along the even equidistance of underbeam frame (2) length direction, triangular steel frame (4) top fixed connection goes up roof beam structure (5), two link to each other through coupling mechanism (6) between underbeam frame (2) of bridge (1), coupling mechanism (6) drive bridge (1) horizontal slip of both sides, two be equipped with between bridge (1) and promote fill (7), promote fill (7) both sides and link to each other with hoist mechanism (9) through steel cable (8), hoist mechanism (9) fixed mounting is close to coupling mechanism (6) one end at last roof beam structure (5), still symmetry fixed mounting stand (10) between lower roof beam structure (2) and last roof beam structure (5), stand (10) fixed mounting is close to between stand (2) and the guide mechanism (6) one end, guide mechanism (11) are close to between stand beam structure (6) fixed mounting (11).

2. The earth moving bridge for the large foundation pit as claimed in claim 1, wherein: coupling mechanism (6) include sliding sleeve (12), sliding sleeve (12) are run through to the one end of roof beam structure (2) down, roof beam structure (2) and sliding sleeve (12) sliding connection down, sliding sleeve (12) outer wall fixed mounting drive box (13), it is equipped with first drive shaft (14) to run through in drive box (13), first drive shaft (14) rotate with drive box (13) and are connected, do not the output shaft fixed connection of first drive shaft (14) one end and first motor (15), sliding sleeve (12) are close to drive box (13) one side inner wall symmetry fixed drive gear (16), drive gear (16) rotate with sliding sleeve (12) inner wall and are connected, the pivot of drive gear (16) passes through the bevel gear pair and meshes with first drive shaft (14), roof beam structure (2) are close to drive box (13) outer wall one side fixed mounting rack (17) down, rack (17) and drive gear (16) mesh.

3. The earthwork transfer bridge for a large foundation pit according to claim 1, wherein: the lifting bucket (7) comprises a bottom plate (18), side plates (19) are symmetrically and fixedly installed on two sides of the bottom plate (18), baffle plates (20) are symmetrically fixed between the side plates (19), and the side wall of the upper end of each baffle plate (20) is rotatably connected with the side plates (19).

4. The earthwork transfer bridge for a large foundation pit according to claim 1, wherein: the lifting mechanism (9) comprises a winding shaft (21) penetrating between stand columns (10), the winding shaft (21) is horizontally arranged above the material guide mechanism (11), the winding shaft (21) is rotatably connected with the stand columns (10) on two sides, two ends of the winding shaft (21) are connected with a second driving shaft (22) through a belt, the second driving shaft (22) is rotatably connected with a shaft seat (23), the shaft seat (23) is fixedly arranged at the top of the upper beam frame (5), one end, away from a belt pulley, of the second driving shaft (22) is connected with the output end of a speed changer (24), the input end of the speed changer (24) is connected with the output shaft of a second motor (25), the second motor (25) is fixedly arranged at the top of the upper beam frame (5), winding wheels (26) are symmetrically arranged on the surface of the winding shaft (21), one end of a steel rope (8) is arranged on the surface of the winding wheel (26) in a surrounding mode, and the other end of the steel rope (8) is fixed with the lifting hopper (7).

5. The earthwork transfer bridge for a large foundation pit according to claim 1, wherein: the material guide mechanism (11) comprises a material guide plate (27) arranged between stand columns (10), two ends of the material guide plate (27) are rotatably connected with a first sliding block (28), a vertical first sliding hole (29) is formed in each stand column (10), a first guide rod (30) vertically penetrates through the first sliding hole (29), the upper end of the first guide rod (30) penetrates through the first sliding block (28), the first sliding block (28) is slidably connected with the first guide rod (30), a first spring (31) is sleeved on the surface of the first guide rod (30) between the bottom of the first sliding block (28) and the bottom of the first sliding hole (29), a rotating shaft of the material guide plate (27) is connected with an output shaft of a third motor (32) through a belt, the third motor (32) is fixedly installed on the side wall of each stand column (10), and a tensioning mechanism (33) is arranged on a driving belt of the material guide plate (27).

6. The earthwork transfer bridge for a large foundation pit according to claim 5, wherein: first pull rod (34) are symmetrically fixed to the side wall of the upper end of the material guide plate (27), one end of the first pull rod (34) is rotatably connected with the side wall of the material guide plate (27), the other end of the first pull rod (34) is rotatably connected with the second pull rod (35), and one end, far away from the first pull rod (34), of the second pull rod (35) is rotatably connected with the side wall of the upper end of the first sliding block (28).

7. The earthwork transfer bridge for a large foundation pit according to claim 5, wherein: tensioning assembly (33) is including fixed block (36), stand (10) outer wall between stock guide (27) pivot and third motor (32) output shaft is fixed to fixed block (36), the level runs through and is equipped with second slide opening (37) in the middle of fixed block (36), second slide opening (37) inside runs through and is equipped with second guide bar (38), be equipped with second slider (39) on second guide bar (38), second slider (39) and second guide bar (38) sliding connection, second slider (39) keep away from stand (10) one side and link to each other with second slide opening (37) through second spring (40), second guide bar (38) surface is established to second spring (40) cover, install take-up pulley (45) on second slider (39), take-up pulley (45) and second slider (39) rotate to be connected, the drive belt of stock guide (27) passes take-up pulley (45).

8. The earthwork transfer bridge for a large foundation pit according to claim 1, wherein: lower roof beam structure (2) keep away from coupling mechanism (6) one end in the middle of be equipped with swash plate (41), swash plate (41) are close to backup pad (3) one end and rotate with lower roof beam structure (2) and are connected, swash plate (41) upper end flushes with backup pad (3), roof beam structure (2) lateral wall corresponds swash plate (41) department symmetry fixed mounting supporting seat (42) down, run through on support column (42) and be equipped with bracing piece (43), bracing piece (43) rotate with support column (42) and are connected, roof beam structure (2) bottom fixed mounting gyro wheel (44) down.