Tunnel door hole reinforcing trolley and reinforcing binding construction method

Abstract

The application discloses a tunnel door hole reinforcing steel bar trolley and a reinforcing steel bar binding construction method, relates to the technical field of tunnel reinforcing steel bar construction, and comprises structures such as a track, a trolley main body, an extension platform, a side surface circumferential reinforcing steel bar lifting device, a side surface longitudinal reinforcing steel bar lifting device and a top circumferential / longitudinal reinforcing steel bar lifting device, adopts a mechanical mode to replace manual carrying, does not need manual carrying of reinforcing steel bars, and has higher construction efficiency. Moreover, the traditional construction mode is to manually carry and pull to carry to the trolley platform, the construction mode of the application does not need carrying and pulling, does not cause great shaking, has better safety, and has higher automation.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction technology, specifically to a tunnel portal steel reinforcement trolley and a steel reinforcement binding construction method. Background Technology

[0002] After tunnel excavation, initial lining needs to be installed immediately, followed by steel reinforcement binding, and finally secondary lining. In tunnels such as subway tunnels and hydroelectric power station tunnels, which contain numerous portal tunnel structures, the steel reinforcement binding is primarily done manually by transporting the steel bars from the ground to a trolley, and then manually lifting them to the designated location for binding. This method of construction has the following disadvantages: In large portal-shaped structures, the steel bar trolleys currently available on the market do not have lifting mechanisms, making it difficult to manually move steel bars, resulting in low construction efficiency and high requirements for the physical fitness of construction workers.

[0003] Poor construction safety: The steel bars are transported from the ground to the platform by manual handling and pulling, and then moved to the corresponding position for binding. The process of moving and pulling at height requires 4-5 people to work together. The trolley shakes a lot, and the personnel are basically working in the air, which poses a great safety hazard.

[0004] Therefore, existing technologies need to be improved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing construction process of portal tunnels is characterized by low efficiency and high risk of manual handling. The purpose is to provide a tunnel portal steel bar trolley and a steel bar binding construction method. By adopting corresponding technical means, the safety risks of construction workers can be reduced and the efficiency of steel bar binding can be improved.

[0006] This invention is achieved through the following technical solution: A tunnel portal rebar trolley includes a track laid with the tunnel centerline as a reference and a trolley body installed on the track. Several telescopic platforms are arranged from top to bottom on the side of the trolley body. Each telescopic platform includes a fixed platform and a movable platform. A side circumferential rebar lifting device is provided at the top of the longitudinal side of the trolley body, a side longitudinal rebar lifting device is provided at the top of the trolley body, and a top circumferential longitudinal rebar lifting device is provided at the top of the transverse side of the trolley body. The top circumferential longitudinal rebar lifting device is located above the side longitudinal rebar lifting device. The top circumferential and longitudinal rebar sliding device includes an arc-shaped channel steel installed transversely across the top of the trolley body, with a steel pipe connecting two of the arc-shaped channel steels.

[0007] In the above technical solution, the circumferential or longitudinal reinforcing bars are lifted to the top platform of the trolley body by the top circumferential and longitudinal reinforcing bar lifting device, and then moved to the position to be tied by the top side circumferential and longitudinal reinforcing bar sliding device. The side circumferential reinforcing bars are lifted from the ground to the top side of the trolley body by the first electric hoist on the side circumferential reinforcing bar lifting device, and the side longitudinal reinforcing bars are lifted from the ground to the side platform of the trolley body by the two second electric hoists on the side longitudinal reinforcing bar lifting device. Finally, they are tied manually. The entire handling and lifting process is carried out by mechanical operation.

[0008] Furthermore, in this invention, the trolley body includes columns, and ground beams, truss-type longitudinal beams, and crossbeams are connected between the columns. Supports are provided between the crossbeams. The net clearance along the longitudinal direction of the columns is 100-200 mm larger than the length of each section of steel reinforcement to meet the requirements for hoisting longitudinal reinforcement along the tunnel direction. The spacing of the truss-type longitudinal beams is controlled at 2000 mm to meet the operation requirements of personnel working on each side platform.

[0009] Furthermore, in this invention, the fixed platform is fixedly connected to the trolley body. A safety line for attaching a safety belt is provided along the longitudinal side of the trolley body on the fixed platform. A first channel steel is provided at the bottom of the fixed platform. A roller is provided inside the first channel steel. Second channel steels are provided on both sides of the movable platform, which are inserted into the first channel steel and connected to the rollers. The horizontal extension and retraction of the movable platform is achieved through the rolling contact between the rollers and the second channel steel.

[0010] Furthermore, in this invention, a telescopic cylinder is hinged to the longitudinal side of the trolley body and a platform support rod is fixedly connected thereto. The telescopic cylinder is hinged to the movable platform, and a support wheel connected to the movable platform is provided at the top of the platform support rod.

[0011] Furthermore, in this invention, the main body of the trolley is provided with a ladder on the side facing the tunnel entrance, the ladder is connected to the fixed platform, and the fixed platform is provided with railings and kickboards.

[0012] Furthermore, in this invention, the aforementioned lateral circumferential rebar lifting device includes a first electric hoist, a support beam, and a support rod. The support beam and the support rod are both connected to the trolley body. An adjusting rod is provided on the top of the support beam, and the adjusting rod is connected to the main beam. The first electric hoist moves along the main beam. The adjusting rod is a screw rod, and the top platform of the trolley body is provided with a screw sleeve that cooperates with the adjusting rod.

[0013] Furthermore, in this invention, the aforementioned side longitudinal steel bar lifting device includes a second electric hoist, a second main beam, and a second support beam. The second support beam is connected to the longitudinal beam at the top of the trolley body, the second main beam is connected to the second support beam, and the second electric hoist moves along the second main beam.

[0014] Furthermore, in this invention, the aforementioned top ring longitudinal steel bar lifting device includes a third support beam, the third support beam is connected to a rotating shaft, the rotating shaft is connected to a third main beam, and the third main beam is connected to a third electric hoist.

[0015] Furthermore, in this invention, a hydraulic cylinder for supporting the top platform is provided on the top of the trolley body.

[0016] This invention also proposes a method for reinforcing bar binding construction, which uses the aforementioned tunnel portal reinforcing bar trolley and includes the following steps: 1. Install the appropriate size tunnel portal rebar trolley onto the track according to the size of the tunnel portal. After adjustment, move the tunnel portal rebar trolley along the track to the binding point and place it in place. 2. After positioning, the circumferential or longitudinal reinforcing bars are lifted from the ground to the top of the trolley body using the top circumferential and longitudinal reinforcing bar lifting device, and then moved to the top side circumferential and longitudinal reinforcing bar sliding device. After being manually slid to the corresponding position, the circumferential or longitudinal reinforcing bars are lifted to the corresponding position for binding using the hydraulic cylinder lifting and manual assistance. 3. After positioning, the side circumferential reinforcement is lifted from the ground to a suitable telescopic platform using the first electric hoist on the side circumferential reinforcement lifting device. Then, the side circumferential reinforcement is manually moved to the corresponding position for binding. 4. After positioning, the side longitudinal reinforcement bars are lifted from the ground to a suitable telescopic platform using two second electric hoists on the side longitudinal reinforcement lifting device. Then, the side longitudinal reinforcement bars are manually moved to the corresponding positions for binding. 5. Repeat steps 2, 3, and 4. After completing the binding, the tunnel portal steel reinforcement trolley moves along the track to the next binding point.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects: This invention provides a tunnel portal rebar trolley. A top-mounted circumferential or longitudinal rebar lifting device lifts the circumferential or longitudinal rebars to the top platform of the trolley body. Then, a sliding device for the top-side circumferential and longitudinal rebars moves them to the required binding position. A first electric hoist on the side circumferential rebar lifting device lifts the side circumferential rebars from the ground to one side of the top platform of the trolley body. Two second electric hoists on the side longitudinal rebar lifting device lift the side longitudinal rebars from the ground to the side platform of the trolley body. Finally, manual binding is performed. The entire handling and lifting process is mechanical, eliminating the need for manual handling and greatly improving efficiency. Simultaneously, the mechanical handling process is more stable, avoiding significant trolley swaying and enhancing safety.

[0018] This invention also provides a method for reinforcing bar binding construction. First, a reinforcing bar trolley for the tunnel portal is assembled and tested. Then, circumferential or longitudinal reinforcing bars, lateral longitudinal bars, and lateral circumferential bars are mechanically transported. Mechanical transport reduces the use of manual labor, saving labor costs compared to manual transport and reducing safety hazards associated with manual labor in tunnel construction. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a structural schematic diagram of the front of a steel reinforcement trolley for a tunnel portal, according to an embodiment of the present invention. Figure 2 This is a structural schematic diagram of the side of a steel reinforcement trolley for a tunnel portal, according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the side structure of the telescopic platform according to an embodiment of the present invention; Figure 4 This is a front view of the telescopic platform according to an embodiment of the present invention; Figure 5 This is a cross-sectional schematic diagram of the first channel steel, the roller, and the second channel steel according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the side structure of the circumferential rebar lifting device according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the front structure of the side circumferential steel bar lifting device according to an embodiment of the present invention; Figure 8 This is a structural schematic diagram of the side longitudinal steel bar lifting device according to an embodiment of the present invention; Figure 9This is a structural schematic of the top ring longitudinal steel bar lifting device according to an embodiment of the present invention.

[0020] The attached diagram shows the markings and corresponding component names: 1-track, 2-cart body, 201-column, 202-ground beam, 203-crossbeam, 204-support, 205-safety line, 3-telescopic platform, 301-fixed platform, 3011-first channel steel, 3012-roller, 3013-railing, 3014-kickboard, 302-moving platform, 3021-second channel steel, 303-telescopic cylinder, 304-platform support rod, 3041-support wheel, 4-side circumferential rebar lifting device, 401-first electric hoist, 402-first main beam, 4 03-First support beam, 404-Adjusting rod, 405-First beam rail, 5-Side longitudinal reinforcement lifting device, 501-Second electric hoist, 502-Second beam rail, 503-Second support beam, 6-Top circumferential longitudinal reinforcement lifting device, 601-Third support beam, 602-Rotating shaft, 603-Third beam rail, 604-Third electric hoist, 605-Bearing seat, 606-Deep groove ball bearing, 607-Flat rolling bearing, 7-Top side circumferential and longitudinal reinforcement sliding device, 701-Arc-shaped channel steel, 702-Steel pipe, 8-Ladder, 9-Hydraulic cylinder. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0022] The following detailed description of embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of the embodiments of the present invention, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, they are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0025] Furthermore, the terms "first," "second," and "third" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0026] Furthermore, the use of terms such as "horizontal" or "vertical" does not imply that the component must be absolutely horizontal or vertical, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of the present invention, "multiple" means at least two.

[0028] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0029] Example 1

[0030] Please refer to Figures 1-9 The image shows a tunnel portal steel reinforcement trolley provided in an embodiment of the present invention, with the specific structure as follows.

[0031] Combination Figure 1 , Figure 2As shown, the tunnel portal rebar trolley in this embodiment mainly consists of six parts: a track 1, a trolley body 2, a telescopic platform 3, a side circumferential rebar lifting device 4, a side longitudinal rebar lifting device 5, and a top circumferential longitudinal rebar lifting device 6. The track 1 provides a smooth travel path for the trolley body 2; the trolley body 2 is the main component, used for stable support and providing installation positions for other components; the telescopic platform 3 facilitates worker standing and can be adjusted to extend towards the tunnel sidewall for easy rebar tying; the side circumferential rebar lifting device 4 lifts the side circumferential rebar to a suitable telescopic platform 3; the side longitudinal rebar lifting device 5 lifts the side longitudinal rebar to one side of the top platform of the trolley body 2; and the top circumferential longitudinal rebar lifting device 6 lifts both the circumferential and longitudinal rebars to the top of the trolley body 2.

[0032] In some implementations of this embodiment, combined with Figure 1 and Figure 2 As shown, two tracks 1 are laid on the tunnel floor. The tracks 1 are made of I-beams and are fixedly installed in channel steel with the tunnel centerline as the reference, to support the weight of the steel reinforcement trolley in the tunnel portal. The trolley body 2 is similar to trolleys in the prior art, and is assembled with a steel frame structure. The trolley body 2 has four vertical columns 201. At the bottom of the columns 201, the trolley wheels and drive device are installed. The drive device is an electric motor that drives the trolley wheels to rotate through various transmission methods (such as gear transmission, belt transmission, etc.). The trolley wheels roll along the tracks 1, realizing the movement of the trolley body 2.

[0033] It should be noted that the clearance along the longitudinal direction of column 201 is 100-200 mm longer than the length of each section of reinforcing steel, to meet the hoisting requirements of the longitudinal reinforcement along the tunnel direction. Along the tunnel cross-section, the spacing of columns 201 meets the requirements for the passage of construction vehicles, and at the same time, columns 201 are as close as possible to the tunnel wall, which is beneficial for workers to tie the reinforcing steel.

[0034] Furthermore, in combination Figure 1 , Figure 2 As shown, the bottoms of the two longitudinal columns 201 are fixedly connected by a ground beam 202. The two longitudinal columns 201 are also equipped with truss-type longitudinal beams, with a spacing of 2000 mm to meet the installation requirements of the side platform and the requirement of a comfortable 2000 mm working range for construction personnel. The two transverse columns 201 are connected by a crossbeam 203, and the crossbeams 203 are reinforced with supports 204, making the overall structure of the trolley body 2 more stable.

[0035] In some implementations of this embodiment, combined with Figure 1 and Figure 3As shown, seven telescopic platforms 3 are installed on each of the left and right sides of the trolley body 2. The height interval of the telescopic platforms 3 is 2 meters. The telescopic platform 3 includes two parts: a fixed platform 301 and a movable platform 302. The fixed platform 301 is a steel frame plate. The fixed platform 301 and the longitudinal side of the trolley body 2 (the side close to the tunnel wall) are double-fixed by bolts and welding.

[0036] It should be noted that, viewed from the front of the tunnel cross section, the fixed platform 301 is stepped, with the width gradually narrowing from the ground upwards, each layer being 100 mm narrower, which facilitates the longitudinal reinforcement being hoisted from the ground onto the telescopic platform 3 of each layer.

[0037] Furthermore, the movable platform 302 is installed at the bottom of the fixed platform 301, and the two are connected by a first channel steel 3011, a roller 3012, and a second channel steel 3021. Figure 3 , Figure 4 , Figure 5 As shown, Figure 5 for Figure 4 The diagram on the right side shows the first channel steel 3011, rollers 3012, and second channel steel 3021. The two first channel steels 3011 are fixedly installed at both ends of the bottom longitudinal direction of the fixed platform 301, perpendicular to the longitudinal direction of the fixed platform 301. Multiple rollers 3012 are fixedly installed inside the first channel steels 3011, allowing them to roll freely. The movable platform 302 is made of steel plate, with two second channel steels 3021 fixed at both ends of the longitudinal direction. The second channel steels 3021 are inserted into the first channel steels 3011, and their inner walls contact the rolling surfaces of the rollers 3012, thus enabling the extension and retraction of the movable platform 302. The extension length of the movable platform 302 is controlled within 1000 mm.

[0038] Furthermore, in order to achieve the extension and retraction of the electrically controlled moving platform 302, such as Figure 4 As shown, four evenly spaced platform support rods 304 are installed on the side of the trolley body 2. Support wheels 3041 are mounted on the top of each platform support rod 304, and the support wheels 3041 abut against the bottom of the movable platform 302. The platform support rods 304 and support wheels 3041 support the weight of the movable platform 302 without affecting its movement. Two telescopic hydraulic cylinders 303 are installed on the side of the trolley body 2. Both ends of the telescopic hydraulic cylinders 303 have hinges; one end is connected to the truss-type longitudinal beam of the trolley body 2 via a pin, and the other end is connected to the bottom of the movable platform 302 via a pin.

[0039] It should be noted that, as Figure 2 , Figure 4As shown, a horizontal safety line 205 is installed on the longitudinal side of the trolley body 2. The safety line 205 is located approximately 1 meter above the fixed platform 301, and the fixed platform 301 is parallel to the safety line 205. The safety line 205 is used for workers to fasten their safety belts, ensuring their safety. A railing 3013 and a kick plate 3014 are installed on the fixed platform 301 to further ensure worker safety. The railing 3013 and kick plate 3014 meet the relevant requirements of GB4053-2009 "Safety Requirements for Fixed Steel Ladders and Platforms" and 15J401 "Steel Ladders".

[0040] In some embodiments, the trolley body 2 is equipped with a ladder 8 on one side of the tunnel exit, and the ladder 8 is connected to one of the telescopic platforms 3, so that one can walk on the telescopic platform 3 through the ladder 8.

[0041] In some embodiments, combined with Figure 1 , Figure 6 and Figure 7 As shown ( Figure 6 for Figure 1 The side circumferential rebar lifting device 4 on the left side of the middle section mainly consists of five parts: a first electric hoist 401, a first main beam 402, a first support beam 403, an adjusting rod 404, and a first beam rail 405. (For example...) Figure 6 The right end of the first main beam 402 is fixed to the trolley body 2 by bolts. The left end of the first main beam 402 extends horizontally to the left. The right end of the first support beam 403 is fixed to the trolley body 2 by bolts. The left end of the first support beam 403 extends obliquely upward and is fixedly connected to the bottom of the first main beam 402. The first support beam 403 plays a supporting role for the first main beam 402.

[0042] Combination Figure 5 and Figure 6 As shown, the first beam rail 405 is made of I-beam steel. The two sides of the first beam rail 405 rest on the top of the first main beam 4021. The first beam rail 405 is longitudinally parallel to the trolley body 2. A first electric hoist 401 is installed on the first beam rail 405, with two first electric hoists 401 connected to each first beam rail 405. The first electric hoists 401 move along the first beam rail 405. A threaded sleeve is installed on the top platform of the trolley body 2, through which an adjusting rod 404 passes. The adjusting rod 404 passes through the middle of the first beam rail 405, and two nuts fitted on the adjusting rod 404 are located on both sides of the first beam rail 405. Rotating the adjusting rod 404 controls the extension distance of the adjusting rod 404, thereby controlling the extension distance of the first beam rail 405, further facilitating the transport of reinforcing bars.

[0043] In some embodiments, combined with Figure 1 , Figure 2 and Figure 8As shown ( Figure 8 for Figure 2 The side longitudinal rebar lifting device 5 is installed on the top of the trolley body 2. The side longitudinal rebar lifting device 5 is mainly composed of three parts: a second electric hoist 501, a second beam rail 502, and a second support beam 503. The portal-shaped second support beam 503 is fixedly connected to the longitudinal beam at the top of the trolley body 2. The second beam rail 502 is an I-beam, and both ends of the second beam rail 502 are fixedly connected to the second support beam 503. The second electric hoist 501 is installed on the second beam rail 502 and moves along the second beam rail 502.

[0044] In some embodiments, combined with Figure 1 , Figure 2 and Figure 9 As shown ( Figure 9 for Figure 2 The top ring longitudinal reinforcement lifting device 6 mainly consists of four parts: a third support beam 601, a rotating shaft 602, a third beam rail 603, and a third electric hoist 604. A support plate is installed on the top of the side of the trolley body 2 opposite to the ladder 8. The third support beam 601 is vertically installed on the top of the support plate, and a connecting shaft is installed on the top of the third support beam 601, with its top end connected to the rotating shaft 602. A sleeve-shaped bearing seat 605 is fitted onto the outside of the rotating shaft 602. A deep groove ball bearing 606 is installed at the top and bottom of the rotating shaft 602, with the outer ring of the deep groove ball bearing 606 fixedly connected to the inner wall of the bearing seat 605. A flat rolling bearing 607 is installed at the top of the bearing seat 605, and the flat rolling bearing 607 is fixedly connected to the bottom of the third beam rail 603. The third electric hoist 604 is installed on the third beam rail 603 and moves along the third beam rail 603.

[0045] In some embodiments, combined with Figure 1 As shown, four hydraulic cylinders 9 are installed on the top of the trolley body 2. The top platform of the trolley body 2 is connected to the hydraulic cylinders 9, which can drive the top platform to rise and fall, reducing the manual lifting height and lowering labor intensity. A stepped platform is installed on the top platform. Combined with... Figure 1 As shown, the rolling device 8 for the top circumferential and longitudinal reinforcing bars is fixed to the top of the trolley body 2. Specifically, four hydraulic telescopic cylinders 9 are installed at the position of the top crossbeam 203 of the trolley body 2. The crossbeam 203 is installed above the hydraulic telescopic cylinders 9 along the tunnel direction. The transverse arc-shaped channel steel 701 is installed at a spacing of about 2000 mm between the crossbeams 203. The arc-shaped channel steel 701 is connected to the steel pipe 702. The steel pipe 702 protrudes slightly from the arc-shaped channel steel 701 to facilitate the sliding of the circumferential and longitudinal reinforcing bars on the steel pipe 702.

[0046] Example 2

[0047] This embodiment proposes a rebar tying construction method, employing the tunnel portal rebar trolley from Embodiment 1, and also using the following construction methods. According to the size of the tunnel portal, install the appropriate size tunnel portal rebar trolley on track 1. After installation, the tunnel portal rebar trolley needs to be adjusted to ensure that it can work normally. After the adjustment is completed, the tunnel portal rebar trolley moves along track 1 to the binding point and is ready to carry out the work.

[0048] Once the tunnel portal reinforcement trolley is in place, the circumferential or longitudinal reinforcement bars can be lifted from the ground to the top of the trolley body 2 using the top circumferential and longitudinal reinforcement lifting device 6. During lifting, the third electric hoist 604 drives the circumferential or longitudinal reinforcement bars upward. After reaching the top, the third beam rail 603 rotates, hoisting the circumferential or longitudinal reinforcement bars to the top side circumferential and longitudinal reinforcement sliding device 7. After the workers manually slide the circumferential or longitudinal reinforcement bars to the corresponding positions, the hydraulic cylinder 9 lifts the workers to a suitable height. Finally, the workers lift the circumferential or longitudinal reinforcement bars to the corresponding positions for binding. Once the tunnel portal steel reinforcement trolley is in place, the side circumferential steel reinforcement is lifted from the ground by the first electric hoist 401 on the side circumferential steel reinforcement lifting device 4. The trolley then uses a telescopic platform 3 for tying during transport. Finally, the side circumferential steel reinforcement is manually moved to the appropriate position for tying. Once the tunnel portal steel reinforcement trolley is in place, the two second electric hoists 501 on the side longitudinal steel reinforcement lifting device 5 lift the side longitudinal reinforcement from the ground to the appropriate telescopic platform 3. Then, the side longitudinal reinforcement is manually transported to the corresponding position for binding. The installation of circumferential reinforcement, longitudinal reinforcement, lateral circumferential reinforcement, and lateral longitudinal reinforcement continues. After the installation of this binding point is completed, the tunnel portal reinforcement trolley moves to the next binding point for work.

[0049] In summary, the embodiments of the present invention provide a tunnel portal rebar trolley and rebar tying construction method, which eliminates the need for manual rebar handling and improves construction efficiency. Furthermore, since traditional construction methods involve manually transporting and pulling rebar onto the trolley platform, the construction method of the present invention eliminates the need for handling and pulling, avoids significant shaking, and offers better safety.

[0050] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A tunnel portal reinforcement trolley, characterized in that, The system includes a track (1) laid with the tunnel centerline as a reference and a trolley body (2) installed on the track (1). The trolley body (2) has several telescopic platforms (3) arranged from top to bottom on its side. The telescopic platforms (3) include fixed platforms (301) and movable platforms (302). The top of the longitudinal side of the trolley body (2) is provided with a side circumferential steel bar lifting device (4). The top of the trolley body (2) is provided with a side longitudinal steel bar lifting device (5). The top of the transverse side of the trolley body (2) is provided with a top circumferential longitudinal steel bar lifting device (6). The top circumferential longitudinal steel bar lifting device (6) is located above the side longitudinal steel bar lifting device (5). The top of the trolley body (2) is provided with a top side circumferential steel bar and longitudinal steel bar sliding device (7). The top side circumferential steel bar and longitudinal steel bar sliding device (7) includes an arc-shaped channel steel (701) installed across the top of the trolley body (2). A steel pipe (702) is connected between the two arc-shaped channel steels (701). The side circumferential rebar lifting device (4) includes a first electric hoist (401), a first main beam (402), and a first support beam (403). The first main beam (402) and the first support beam (403) are both connected to the trolley body (2). An adjusting rod (404) is provided on the top of the first main beam (402). The adjusting rod (404) is connected to a first beam rail (405). The first electric hoist (401) moves along the first beam rail (405). The adjusting rod (404) is a screw rod. The top platform of the trolley body (2) is provided with a screw sleeve that cooperates with the adjusting rod (404). The side longitudinal reinforcement lifting device (5) includes a second electric hoist (501), a second beam rail (502), and a second support beam (503). The second support beam (503) is connected to the longitudinal beam at the top of the trolley body (2), and the second beam rail (502) is connected to the second support beam (503). The second electric hoist (501) moves along the second beam rail (502). The top circumferential longitudinal steel bar lifting device (6) includes a third support beam (601), the third support beam (601) is connected to a rotating shaft (602), the rotating shaft (602) is connected to a third beam rail (603), and the third beam rail (603) is connected to a third electric hoist (604). The top of the trolley body (2) is equipped with a hydraulic cylinder (9) to support the top platform.

2. The tunnel portal steel reinforcement trolley according to claim 1, characterized in that, The trolley body (2) includes columns (201), and the columns (201) are connected to ground beams (202), truss-type longitudinal beams and cross beams (203). Supports (204) are provided between the cross beams (203). The clearance along the longitudinal direction of the columns (201) is 100 mm to 200 mm longer than the length of each section of steel reinforcement to meet the requirements for hoisting longitudinal reinforcement along the tunnel direction. The spacing of the truss-type longitudinal beams is controlled at 2000 mm to meet the operation requirements of the personnel working on each side platform.

3. The tunnel portal steel reinforcement trolley according to claim 1, characterized in that, The fixed platform (301) is fixedly connected to the trolley body (2). A safety line (205) for hanging a safety belt is provided along the longitudinal side of the trolley body (2) along the fixed platform (301). A first channel steel (3011) is provided at the bottom of the fixed platform (301). A roller (3012) is provided inside the first channel steel (3011). A second channel steel (3021) is provided on both sides of the movable platform (302) and is inserted into the first channel steel (3011) and connected to the roller (3012). The movable platform (302) can be horizontally extended and retracted through the rolling contact between the roller (3012) and the second channel steel (3021).

4. The tunnel portal steel reinforcement trolley according to claim 3, characterized in that, The trolley body (2) has a telescopic cylinder (303) hinged to its longitudinal side and a platform support rod (304) fixedly connected thereto. The telescopic cylinder (303) is hinged to the movable platform (302), and the top of the platform support rod (304) is provided with a support wheel (3041) connected to the movable platform (302).

5. The tunnel portal steel reinforcement trolley according to claim 1, characterized in that, The trolley body (2) is provided with a ladder on the side facing the tunnel entrance. The ladder is connected to the fixed platform (301). The fixed platform (301) is provided with railings (3013) and kickboards (3014).

6. A method for reinforcing bar tying construction, using the tunnel portal reinforcing bar trolley as described in claim 1, further comprising the following steps:

1. Install the appropriate size tunnel portal reinforcement trolley on the track (1) according to the size of the tunnel portal. After adjustment, move the tunnel portal reinforcement trolley along the track (1) to the binding point and place it in place.

2. After positioning, the circumferential or longitudinal reinforcing bars are lifted from the ground to the top of the trolley body (2) using the top circumferential and longitudinal reinforcing bar lifting device (6), and moved to the top side circumferential and longitudinal reinforcing bar sliding device (7). After being manually slid to the corresponding position, the circumferential or longitudinal reinforcing bars are lifted to the corresponding position and tied by the lifting of the hydraulic cylinder (9) and manual assistance.

3. After positioning, the side ring reinforcement is lifted from the ground to a suitable telescopic platform (3) by the first electric hoist (401) on the side ring reinforcement lifting device (4). Then, the side ring reinforcement is manually moved to the corresponding position for binding.

4. After positioning, the side longitudinal reinforcement is lifted from the ground to a suitable telescopic platform (3) by two second electric hoists (501) on the side longitudinal reinforcement lifting device (5). Then, the side longitudinal reinforcement is manually moved to the corresponding position for binding.

5. Repeat steps 2, 3, and 4. After completing the binding, the tunnel portal steel reinforcement trolley moves along track (1) to the next binding point.

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