CN216198102U

CN216198102U - Portal frame type arch frame transportation structure and tunnel construction device

Info

Publication number: CN216198102U
Application number: CN202122543642.4U
Authority: CN
Inventors: 兰冰; 冯怀; 何晓江; 邱章令
Original assignee: Sichuan Lanhai Intelligent Equipment Manufacturing Co Ltd
Current assignee: Sichuan Lanhai Intelligent Equipment Manufacturing Co Ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-04-05
Anticipated expiration: 2031-10-21

Abstract

The utility model relates to the technical field of tunnel construction equipment, in particular to a portal type arch frame transportation structure and a tunnel construction device, which comprise a portal type arch frame transportation structure, wherein the upper part of a portal is provided with a first moving part, the first moving part is provided with a first mechanical arm, the first mechanical arm is hinged on the first moving part through a first mechanical arm, and the first mechanical arm can pitch and stretch; the two sides of the portal frame are provided with second mechanical arms, the second mechanical arms are hinged to the second moving portion through second mechanical arms, and the second mechanical arms can pitch and stretch. Aim at through this portal frame formula tunnel construction device, can will treat that the arch centering is directly arranged in on the transport structure, through the motion conveying of transportation area to the tunnel in, the construction in the tunnel is accomplished to manipulator, rock drilling device and the whitewashing device on the rethread portal frame, the device structure is small and exquisite, and need not the frequent business turn over of engineering vehicle, has saved the engineering time.

Description

Portal frame type arch frame transportation structure and tunnel construction device

Technical Field

The utility model belongs to the technical field of tunnel construction equipment, and particularly relates to a portal frame type arch frame transportation structure and a tunnel construction device.

Background

In tunnel construction, a plurality of processes such as erecting, rock drilling, guniting and the like are usually involved, for a tunnel with a small width (the width of a tunnel opening is less than 6m), it is relatively difficult to drive into a complete engineering trolley, and because the engineering trolley is large, other vehicles cannot enter after driving into the tunnel, and the working space of the engineering trolley is limited, so that the engineering trolley is not suitable for construction in the tunnel with the small width.

Before tunnel construction, the common construction steps are that an arch frame to be erected is transported into a tunnel through an engineering vehicle, then the engineering vehicle exits the tunnel, and then the tunnel construction vehicle drives in to carry out the erection construction.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a portal frame type arch frame transportation structure, a tunnel construction device and a construction method.

The technical scheme adopted by the utility model is as follows:

the utility model provides a portal frame bow member transportation structure, includes the portal, the portal upper end is provided with the transportation area, the relative portal in transportation area rotates, fixed connection bow member supporting seat is taken in the transportation.

Preferably, the length of the conveying belt is equal to that of the gantry, the conveying belt is driven to rotate by a motor or a motor, the motor or the motor is arranged on the upper portion of the gantry, the number of the conveying belts on the gantry is two, and the two arch support seats on the conveying belt correspond to one another one by one.

A portal type tunnel construction device comprises the portal type arch frame transportation structure, wherein a first moving part is arranged at the upper part of a portal and moves relative to the portal, a first mechanical arm is arranged on the first moving part and hinged to the first moving part through a first mechanical arm, and the first mechanical arm can pitch and stretch; the two sides of the door frame are provided with second mechanical arms, the second mechanical arms are hinged to the second moving portion through second mechanical arms, the second moving portion is opposite to the door frame in moving, the second mechanical arms can pitch and stretch, and the second mechanical arms can rotate relative to the second moving portion.

Preferably, the first manipulator can rotate in a vertical plane, and the second manipulator can rotate in the vertical plane; the upper portion of portal, the below of first removal portion set up first walking beam, first walking beam is relative the portal removes, set up the rock drilling device on the first walking beam, the rock drilling device is connected with the fourth arm, the fourth arm can be in vertical face from top to bottom rotation, the fourth arm can be at horizontal rotation.

Preferably, a second movable beam is arranged on the upper portion of the gantry and below the first movable portion, the second movable beam moves relative to the gantry, a third mechanical arm is arranged on the end portion of the second movable beam, the third mechanical arm can rotate up and down in a vertical plane, and the third mechanical arm can rotate in a horizontal plane; the third mechanical arm is connected with a guniting arm, the guniting arm rotates in a horizontal plane relative to the third mechanical arm, and the other end of the guniting arm is connected with a spray head assembly.

Preferably, an excavating device is arranged in the portal frame, the excavating device is detachably connected with the portal frame, and a conveying device is arranged below the excavating device; the height of the rock drilling device and the height of the slurry spraying arm are lower than the height of the conveying belt; the excavating device is a heading machine.

Preferably, the conveying device comprises a conveying belt, the length of the conveying belt is equivalent to that of the portal frame, and a shovel plate is arranged at the front end of the conveying belt; the shovel board comprises a shovel bucket and a shovel claw, the shovel claw is arranged on the shovel bucket, the shovel claw is opposite to the shovel bucket and rotates, the shovel claw is in an arc shape, and the rotating direction of the shovel claw is towards the inner arc direction of the shovel claw.

Preferably, the number of the shovel claws is two, the shovel claws are symmetrically arranged on the bucket, the conveyor belt is arranged between the two shovel claws, and the height of the position where the conveyor belt is located is lower than that of the position where the shovel claws are located.

Preferably, an auxiliary device is arranged at one end, far away from the arch frame gripper assembly, of the portal frame, the auxiliary device comprises a first telescopic rod and a lifting hook, the first telescopic rod is fixedly connected with the portal frame, the lifting hook is connected with the end portion of the first telescopic rod through a second telescopic rod, and the first telescopic rod and the second telescopic rod are perpendicular to each other.

The utility model has the advantages that: through the transportation structure on the portal frame, a plurality of arch frames can be placed on the portal frame before tunnel construction, and the arch frames are transported to the front end through the movement of the transportation structure, so that the front end manipulator can grab the arch frames conveniently; the width of the portal frame is equivalent to that of the tunnel, and small engineering vehicles can drive into the portal frame, so that other construction operations can be conveniently carried out; the front end of the portal frame is integrated with the gripping device, the guniting device and the rock drilling device, so that the construction operation in the tunnel can be completed when other engineering vehicles are not driven in, and the construction time is saved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a partially enlarged view of the first robot;

figure 3 is an enlarged view of a part of the rock drilling rig and the shotcrete arm;

FIG. 4 is an embodiment of a portal tunnel construction apparatus;

FIG. 5 is a partial enlarged view of the auxiliary device;

fig. 6 is a partially enlarged view of the excavating device.

In the figure: 1-portal frame; 2-an arch frame supporting seat; 3-a conveyor belt; 4-a first walking beam; 5-a first manipulator; 6-a second moving part; 7-a second manipulator; 8-a rock drilling device; 9-a fourth mechanical arm; 10-a guniting arm; 11-a third mechanical arm; 12-a spray head assembly; 13-a first robot arm; 14-a second mechanical arm; 15-a first moving part; 16-an auxiliary device; 17-a digging device; 18-a conveyor belt; 19-a shovel plate; 20-a first telescoping rod; 21-a hook; 22-a second telescoping rod; 31-a bucket; 32-claw.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Example one

As shown in fig. 1-3, a portal frame type arch transportation structure includes a portal frame 1, the width of the portal frame 1 is equal to the width of a tunnel, and the portal frame is placed in the tunnel, a transportation belt 3 is arranged at the upper end of the portal frame 1, the transportation belt 3 is driven by a motor, the transportation belt 3 can also be driven by a hydraulic motor to rotate, the portal frame 1 rotates relatively, the rotation direction of the transportation belt 3 is from the outer side of the tunnel to the inner side of the tunnel, so that the arch is gradually conveyed forwards, a plurality of arch supporting seats 2 are fixedly connected to the transportation belt 3, an arch can be placed on each arch supporting seat 2, the transportation belt 3 is symmetrically arranged in two sides of the portal frame 1, so that the stability of arch transportation is ensured, and the arch supporting seats 2 on the two transportation belts 3 correspond to one another. It can be understood that the arch frame is directly placed on the supporting seats 2 at the two sides of the portal frame 1, and the conveying belts 3 at the two sides of the portal frame 1 synchronously rotate, so that the front arch frame and the rear arch frame are parallel to each other and do not interfere with each other during the conveying.

The conveyor belt 3 has a length corresponding to the length of the portal 1 so that the arch is transported from the outside of the tunnel to the inside of the tunnel, the motor being arranged in the upper part of the portal 1.

Example two

The utility model provides a portal frame formula tunnel construction device, the device can directly place when tunnel construction and use in the tunnel, along with the continuous construction forward in tunnel, the device also can set up running gear under it, and running gear can be the track for the device can constantly move forward along with the construction in tunnel, thereby guarantees going on of construction.

The portal arch frame transportation structure specifically comprises the portal arch frame transportation structure, wherein a first moving part 15 is arranged at the upper part of a portal frame 1, the first moving part 15 can be arranged on the axis of the portal frame 1, the first moving part 15 moves relative to the portal frame 1, a first manipulator 5 is arranged on the first moving part 15, the first manipulator 5 can grab an arch frame, the first manipulator 5 is hinged to the first moving part 15 through a first manipulator arm 13, and the first manipulator 13 can pitch and stretch, so that the flexibility and the working range of the first manipulator 5 are increased; the two sides of the door frame 1 are provided with second mechanical arms 7, the second mechanical arms 7 are hinged to the second moving portion 6 through second mechanical arms 14, the second moving portion 6 moves relative to the door frame 1, the second mechanical arms 14 can pitch and stretch, and the second mechanical arms 14 can rotate relative to the second moving portion 6. When the arch is transported to the front end of the portal 1, the first mechanical arm 5 and the second mechanical arms 7 on the two sides of the portal 1 grab the arch together, and the arch is placed on the inner wall surface side of the tunnel for installation and construction.

In order to increase the flexibility of the first manipulator 5 and the second manipulator 7, the first manipulator 5 and the second manipulator 7 can rotate up and down and left and right in the vertical plane, and the grabbing angle of the first manipulator 5 and the second manipulator 7 is adjusted to ensure the grabbing of the arch.

The utility model discloses a rock drilling device, including portal 1, first removal portion 15, first walking beam 4 is portal 1 relative and is removed, and the moving direction is for the length direction back-and-forth movement along portal 1, set up rock drilling device 8 on the first walking beam 4, rock drilling device 8 is connected with fourth arm 9, fourth arm 9 can be at vertical internal rotation from top to bottom, fourth arm 9 can be at horizontal rotation, and fourth arm 9 can drive rock drilling device 8 and rotate to guarantee that rock drilling device 8 can be on each angle, carry out the rock drilling construction, the rock drilling construction is drilled on the wall in tunnel promptly, thereby makes preparation for the follow-up stock of beating into, and rock drilling device is prior art, and here is no longer repeated.

A second movable beam is arranged on the upper portion of the gantry 1 and below the first movable portion 15, the second movable beam moves relative to the gantry 1, a third mechanical arm 11 is arranged on the end portion of the second movable beam, the third mechanical arm 11 can rotate up and down in a vertical plane, and the third mechanical arm 11 can rotate in a horizontal plane; the third mechanical arm 11 is connected with the guniting arm 10, the guniting arm 10 rotates in a horizontal plane relative to the third mechanical arm 11, and the other end of the guniting arm 10 is connected with the spray head assembly 12. The guniting arm 10 can be used for guniting the wall surface of the tunnel after the stand is completed.

The spray arm 10 and the rock drilling device 8 are arranged one above the other, and the spray arm 10 may be arranged above the rock drilling device 8, in this embodiment preferably the first travelling beam 4 is arranged above the second travelling beam, i.e. the rock drilling device 8 is arranged above the spray arm 10.

The specific working mode is as follows: when the portal frame type tunnel construction device is used, the portal frame type tunnel construction device is placed in a tunnel, and the auxiliary device 16 on the portal frame 1 is provided with the telescopic lifting hook through an external crane, so that the position of an arch frame is adjusted when the arch frame is placed on the arch frame supporting seat 2; placing the arches one by one on the arch support seat 2, and driving the conveyor belt 3 to move towards the inner side of the tunnel through the rotation of the motor so as to drive the arches to move towards the inner side of the tunnel; treat that the bow member removes behind the tip of portal 1, the top of first manipulator 5 is just in time arranged in to the bow member this moment, control first manipulator 5 and the action of second manipulator 7 through constructor, and the flexible of first arm 13 and second arm 14, make the bow member place in the internal face department in tunnel, the stock is squeezed into after 8 drilling of rethread rock drilling device, rock drilling device 8 and first manipulator 5 and second manipulator 7 retract to the normal position this moment, whitewashing arm 10 removes to treating the whitewashing position, carry out the whitewashing to the internal face in tunnel.

In the construction process, small engineering vehicles can be driven into the portal 1, the progress of other construction steps in the tunnel is guaranteed, and when the small engineering vehicles are driven into the portal 1, the passing of the vehicles can be guaranteed without moving.

EXAMPLE III

The difference from the above embodiments is that, as shown in fig. 4-6, in the present embodiment, an excavating device 17 is provided in the portal 1, the excavating device 17 is used for excavating the wall surface of the tunnel, the excavating device 17 is detachably connected with the portal 1, the detachable connection can adopt the existing way, such as riveting, screwing and the like, and when the excavating device 17 is not needed, the excavating device 17 can be detached; and a conveying device is arranged below the excavating device 17 and used for conveying the broken stones, the broken slag and the like which are excavated in the tunnel, and the broken stones and the broken slag are conveyed out of the tunnel through the conveying device.

The height of the rock drilling device 8 and the height of the guniting arm 10 are lower than the height of the conveyer belt 3; the excavating device 17 is a heading machine.

The conveying device comprises a conveying belt 18, the length of the conveying belt 18 is equivalent to that of the portal frame 1, and the excavated slag is conveyed out of the tunnel; the front end of the conveyor belt 18 is provided with a shovel plate 19, and the shovel plate 19 can shovel the crushed slag to be placed on the conveyor belt 18 and then the crushed slag is transmitted through the conveyor belt 18; the shovel plate 19 includes a bucket 31 and a claw 32, the claw 32 is disposed on the bucket 31, the claw 32 rotates relative to the bucket 31, the claw 32 is arc-shaped, and the rotation direction of the claw 32 rotates towards the inner arc direction of the claw 32. It will be appreciated that after the excavating unit 17 has excavated, as the excavating unit 17 is continuously advanced, crushed stone and debris are scooped into the bucket 31, and as the claws 32 are continuously rotated, the crushed stone and debris are carried to the conveyor 18, thereby completing the operation of conveying the crushed stone and debris.

In this embodiment, two claws 32 are symmetrically arranged on the bucket 31, the conveyor belt 18 is arranged between the two claws 32, and the height of the position of the conveyor belt 18 is lower than that of the position of the claws 32. Because the height of the conveyor belt 18 is lower than the height of the position of the claw 32, when the claw rotates to the conveyor belt 18 with the crushed stone, the crushed stone falls onto the conveyor belt 18 due to the height difference, and the transportation of the conveyor belt 18 is ensured.

One end of the gantry 1 far away from the arch support hand grab assembly is provided with an auxiliary device 16, the auxiliary device 16 comprises a first telescopic rod 20 and a lifting hook 21, the first telescopic rod 20 is fixedly connected with the gantry 1, the lifting hook 21 is connected with the end portion of the first telescopic rod 20 through a second telescopic rod 22, the first telescopic rod 20 and the second telescopic rod 22 are perpendicular to each other, and when the arch support is placed on the arch support seat 2, the position of the arch support is adjusted. The auxiliary device 16 can be extended and retracted in the horizontal direction and the vertical direction respectively, so that the position of the arch frame can be adjusted in time.

Example four

Based on the portal tunnel construction device of the third embodiment, the present embodiment provides a portal tunnel construction device construction method, including the following steps:

s1: after the excavating device 17 is connected with the portal frame 1, the excavating device 17 drives the portal frame 1 to drive into the tunnel, and rollers can be arranged below the portal frame 1 to facilitate the movement of the portal frame 1; excavating according to the construction requirements on site when the device 17 to be excavated moves into the wall surface to be excavated in the tunnel, shoveling the broken stones and the crushed slag into a shovel plate 19 along with the continuous forward movement of the excavating device 17, and bringing the broken stones and the crushed slag onto a conveyor belt 18 through the rotation of a shovel claw 32, wherein the excavated broken stones and the crushed slag are continuously transported to the outside of the tunnel through a transporting device below the excavating device 17; after the excavation is completed, the crushed stones and chips which are not shoveled on the shovel plate 19 may be carried to the conveyor belt 18 by the constructor, and then, may be carried to the outside of the tunnel by the conveyor belt 18.

S2: the arch centering to be constructed is conveyed to the wall surface to be constructed in the tunnel from the outside of the tunnel through a conveying belt 3 at the upper end of a portal frame 1; a constructor makes an arch frame installation reference point according to design requirements at a position to be installed of the arch frame on the wall surface of the tunnel; with the continuous rotation of the conveyer belt 3, the arch frame can be driven to be conveyed from the outer side of the tunnel to the inner side of the tunnel, and the arch frame stops when conveyed to the end part of the portal frame 1 to wait for the grabbing of the mechanical arm.

S3: a plurality of mechanical grippers on the portal 1 respectively grab the arch centering conveyed to the end part of the portal 1 by the conveying belt 3, the grabbed arch centering is lifted to the air for splicing, and constructors move to the splicing position of the arch centering to fixedly connect the arch centering; after the connection is finished, one of the mechanical arms grabs the spliced arch center whole, lifts the arch center whole to the wall surface of the tunnel arch center to be installed, and connects the arch center whole with the installed arch center whole by constructors; and returning the other manipulators to the original positions to grab the arch centering conveyed into the tunnel on the portal frame 1, integrally splicing the next arch centering, and circulating the steps.

In the embodiment, three manipulators are taken as an example, the first manipulator 5 and the two second manipulators 7 respectively grab the arches and lift the three arches to positions convenient for operation of construction personnel in the air, and the construction personnel weld or bolt the three arches to splice into an arch whole; after splicing is completed, the left second mechanical arm 7 and the right second mechanical arm 7 return to the original positions, the middle first mechanical arm 5 continues to grab the whole arch centering and moves to the wall surface of the tunnel, and constructors can connect the whole arch centering with the previously installed whole arch centering, so that the whole arch centering is guaranteed to be stable; when the whole arch center is integrally connected with the previous arch center, the two second manipulators 7 which return to the original positions continue to grab the arch center on the portal frame 1 and lift to constructors for splicing, and in the splicing process of the constructors, the first manipulator 5 finishes lifting work, returns to the original positions to grab the arch center and then splices with the arch centers grabbed by the two second manipulators 7; after the whole splicing of each arch is completed, the arch is integrally lifted to the wall surface of the tunnel by a manipulator for grabbing the middle arch, and the arch is integrally connected with the previous arch, so that the whole stability of the arch is ensured.

S4: after the number of the installed arch centering on the tunnel construction wall surface reaches 2-5, the plurality of mechanical arms return to the original position, the rock drilling device 8 moves towards the tunnel construction wall surface and extends out, anchor rod holes are drilled on the tunnel wall surface according to design requirements, and the rock drilling device 8 returns to the original position after all the anchor rod holes are drilled; after all anchor rod holes are drilled, constructors install anchor rods to reinforce the installed integral arch centering, so that the integral arch centering is more stable;

s5: the guniting device moves towards the tunnel construction wall surface and extends out, guniting is carried out on the tunnel wall surface to be constructed, and maintenance is carried out to reach the maintenance standard;

s6: the above steps S1 to S5 are repeated, and the construction of the tunnel is finally completed. By using the portal tunnel construction device, the construction of the whole tunnel can be completed in a continuous propelling mode under the conditions that other vehicles are not driven in and the portal tunnel construction device does not need to be driven out, and the tunnel construction efficiency is greatly improved.

The further technical scheme is that in step S2, the arch to be constructed transported by the transport belt 3 on the gantry 1 is a plurality of prefabricated arches, and the specific operations of the plurality of prefabricated arches are as follows:

s21: outside the tunnel, a constructor processes a single arch frame into an arc according to construction requirements, welding connecting plates or end plates at two ends of the single arch frame, and assembling and connecting a plurality of single arch frames together through the connecting plates or the end plates so as to form a shape suitable for wall surface supporting of the tunnel;

s22: placing a plurality of single-truss arches side by side, namely placing the plurality of single-truss arches in parallel, and welding connecting ribs among the single-truss arches, wherein the connecting ribs can adopt reinforcing steel bars, and the plurality of single-truss arches are preliminarily positioned and fixed through the connecting ribs;

s23: and paving reinforcing mesh sheets on the multi-arch frames welded with the connecting ribs, wherein the paving area of the reinforcing mesh sheets is the length and width direction covering the whole multi-arch frames, and the paving position of the reinforcing mesh sheets is the outer arc side of the multi-arch frames.

A plurality of prefabricated arch frames are directly conveyed to the interior of the tunnel through the conveying belt 3 on the portal 1, and the manipulator directly grabs the prefabricated arch frames, so that the speed of arch frame support at the position to be avoided in the tunnel can be increased, and the construction efficiency is improved.

The above-mentioned embodiments are preferred embodiments, it should be noted that the above-mentioned preferred embodiments should not be considered as limitations to the utility model, and the scope of protection of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the utility model, and these modifications and adaptations should be considered within the scope of the utility model.

Claims

1. The utility model provides a portal frame bow member transportation structure, includes portal (1), its characterized in that: the gantry crane is characterized in that a conveying belt (3) is arranged at the upper end of the gantry (1), the conveying belt (3) rotates relative to the gantry (1), and the conveying belt (3) is fixedly connected with an arch support seat (2).

2. A portal arch transport structure according to claim 1, wherein: the length of the conveying belt (3) is equivalent to that of the portal frame (1), the conveying belt (3) is driven to rotate by a motor or a motor, the motor or the motor is arranged on the upper portion of the portal frame (1), the conveying belt (3) is symmetrically arranged on the portal frame (1) in two, and the two conveying belts are arranged on the arch frame supporting seats (2) in one-to-one correspondence.

3. A portal tunnel construction apparatus comprising the portal arch transport structure according to any one of claims 1 to 2, wherein: a first moving part (15) is arranged at the upper part of the gantry (1), the first moving part (15) moves relative to the gantry (1), a first mechanical arm (5) is arranged on the first moving part (15), the first mechanical arm (5) is hinged to the first moving part (15) through a first mechanical arm (13), and the first mechanical arm (13) can pitch and stretch; the two sides of the portal (1) are provided with second mechanical arms (7), the second mechanical arms (7) are hinged to the second moving portion (6) through second mechanical arms (14), the second moving portion (6) is opposite to the portal (1) in moving, the second mechanical arms (14) can be pitching and telescopic, and the second mechanical arms (14) can be opposite to the second moving portion (6) in rotating.

4. The portal tunnel construction device according to claim 3, wherein: the first manipulator (5) can rotate in a vertical plane, and the second manipulator (7) can rotate in the vertical plane; the upper portion of portal (1), the below of first removal portion (15) sets up first walking beam (4), first walking beam (4) are relative portal (1) removes, set up rock drilling device (8) on first walking beam (4), rock drilling device (8) are connected with fourth arm (9), fourth arm (9) can be in vertical plane tilting, fourth arm (9) can be at horizontal rotation.

5. The portal tunnel construction device according to claim 4, wherein: a second movable beam is arranged on the upper portion of the gantry (1) and below the first movable portion (15), the second movable beam moves relative to the gantry (1), a third mechanical arm (11) is arranged on the end portion of the second movable beam, the third mechanical arm (11) can rotate up and down in a vertical plane, and the third mechanical arm (11) can rotate in a horizontal plane; the third mechanical arm (11) is connected with the guniting arm (10), the guniting arm (10) rotates in the horizontal plane relative to the third mechanical arm (11), and the other end of the guniting arm (10) is connected with the spray head assembly (12).

6. The portal tunnel construction device according to claim 5, wherein: an excavating device (17) is arranged in the portal frame (1), the excavating device (17) is detachably connected with the portal frame (1), and a conveying device is arranged below the excavating device (17); the height of the rock drilling device (8) and the height of the slurry spraying arm (10) are lower than the height of the conveying belt (3); the excavating device (17) is a heading machine.

7. The portal tunnel construction device according to claim 6, wherein: the conveying device comprises a conveying belt (18), the length of the conveying belt (18) is equivalent to that of the gantry (1), and a shovel plate (19) is arranged at the front end of the conveying belt (18); shovel board (19) are including scraper bowl (31) and claw (32), claw (32) set up on scraper bowl (31), claw (32) are relative scraper bowl (31) rotate, claw (32) are the arcuation, the rotation direction of claw (32) is for the orientation the inner arc direction of claw (32) rotates.

8. The portal tunnel construction device according to claim 7, wherein: the scraper bucket is characterized in that the number of the scraper claws (32) is two, the scraper claws (32) are symmetrically arranged on the scraper bucket (31), the conveyor belt (18) is arranged between the two scraper claws (32), and the height of the position where the conveyor belt (18) is located is lower than that of the position where the scraper claws (32) are located.

9. The portal tunnel construction device according to claim 8, wherein: one end of the gantry (1) far away from the arch frame gripper assembly is provided with an auxiliary device (16), the auxiliary device (16) comprises a first telescopic rod (20) and a lifting hook (21), the first telescopic rod (20) is fixedly connected with the gantry (1), the lifting hook (21) is connected with the end portion of the first telescopic rod (20) through a second telescopic rod (22), and the first telescopic rod (20) and the second telescopic rod (22) are perpendicular to each other.