CN205382940U - Self -propelled tunnel overlength inverted arch moving die plate steel case roof beam landing stage - Google Patents

Abstract

The utility model relates to the field of tunnel construction device design, in particular to a self-propelled tunnel ultra-long inverted arch mobile formwork steel box girder trestle, including a front approach bridge, a rear approach bridge and a main bridge, and also includes a mobile trestle arranged under the main bridge The walking device and the support device used to bear the working weight of the trestle bridge, the walking device includes a travel driving device arranged in front of the main bridge and a walking driven device arranged at the rear of the main bridge, and the supporting device is arranged at the front and rear sides of the main bridge At the end, the running device and supporting device are directly installed on the main bridge. Aiming at the problem of low walking efficiency due to the need to repeatedly operate the supporting chassis and track movement in the prior art, and then repeatedly operate the main bridge movement, and the problem of warping over when the front approach bridge of the existing trestle bridge is used with a large span, this self-made The super-long inverted arch mobile formwork steel box girder trestle of the type tunnel has high walking efficiency, and the construction span is large, so it will not overturn.

Description

A self-propelled tunnel ultra-long inverted arch mobile formwork steel box girder trestle bridge

technical field

The utility model relates to a tunnel construction device, in particular to a self-propelled tunnel ultra-long inverted arch mobile formwork steel box girder trestle.

Background technique

During tunnel construction, when the front of the tunnel is excavated, the stones produced need to be transported out through the rear, followed by construction and filling with concrete. During the construction of the inverted arch to fill the concrete, the passage of the ballasting vehicle is blocked. At this time, it is necessary to use the trestle bridge to cross the inverted arch to fill the concrete construction area, so that the ballasting vehicle can pass through the trestle bridge, and at the same time, the engineers are working under the trestle bridge.

At present, there are many types of trestle bridges used in tunnel construction. The relatively simple trestle bridge is a structure made of I-beam splicing. The arch formwork is separated, and the formwork needs to be laid separately, and the construction efficiency is very low. After the construction of each section is completed, it is very troublesome to move the trestle, and it is very inconvenient to use other machines to tow it. After the trestle is moved in place, the formwork needs to be laid again.

The trestles currently used in the market are relatively optimized. This relatively optimized trestle is integrated with the inverted arch formwork. Move together, and then make the inverted arch formwork in place for the construction of the next section. The trestle bridge is mainly composed of the front approach bridge, the main bridge, the rear approach bridge and the support base. The support base set under the main bridge is supported on the poured concrete surface. The area under the front approach bridge and the rear approach bridge can be used as a separate concrete pouring area. The front approach bridge and The concrete pouring area can also be carried out under the rear approach bridge at the same time. For example, the low-voltage grounding trestle disclosed by the authorization announcement number "CN201574349U" has an application date of January 8, 2010 and an authorization announcement date of September 8, 2010. When this type of trestle is moving, it can be folded away by operating the lifting cylinder. The front approach bridge and the rear approach bridge are driven by operating the traverse cylinder to make relative movement between the main bridge and the underframe, so that the main bridge moves horizontally, and the longitudinal track moves along with the main bridge, and the drive motor is used to move the track in the longitudinal direction. Then operate the rotary lifting cylinder to support the traveling wheel on the longitudinal moving track, thereby driving the traveling wheel to achieve the purpose of driving the trestle to move. This type of trestle has the following disadvantages:

1. When the trestle is moving, first move the underframe supporting the trestle. After the underframe is moved in place, then move the trestle, and then move the underframe. Repeatedly, the walking efficiency of the trestle is low;

2. When the trestle is moving, operate the drive motor to move the track of the walking wheel. After the track moves in place, then operate the oil cylinder to control the walking wheel, so as to drive the walking wheel to walk on the track to achieve the purpose of driving the trestle. Repeat this, the trestle will move The walking efficiency is low;

3. Since the walking drive device is set on the inverted arch concrete pouring surface behind the trestle, when the current approach bridge has a large span, it is easy to cause warping accidents due to imbalance, and it is necessary to increase the counterweight at the rear, and because the trestle is long , equipment costs increased.

The above-mentioned problems become the key issues restricting the use of this type of trestle bridge, and when using this type of trestle bridge, the limitations are relatively large. The existing technology does not solve these problems. When this type of trestle is actually used, the longitudinal truss of the trestle is usually bulky, troublesome to disassemble, costly, and occupying construction space. The longitudinal truss of most trestles is The factory self-made structure, the longitudinal truss of this self-made structure is high in cost, heavy in weight, and troublesome in disassembly and assembly.

Utility model content

In the prior art, when the trestle is moving, it is necessary to repeatedly operate the supporting chassis and the track to move, and then repeatedly operate the main bridge to move, resulting in a very low moving efficiency of the main bridge. On the concrete pouring surface, when the rear and front concrete pouring areas are long and the length of the trestle bridge is lengthened, it is necessary to configure a large counterweight to prevent the trestle bridge from tilting. The utility model provides a self-propelled tunnel super long inverted arch mobile formwork steel box girder Trestle bridge, the trestle bridge has high walking efficiency, and the construction span is large, and it will not turn over.

In order to achieve the above object, the technical solution adopted by the utility model is:

A self-propelled tunnel super-long inverted arch mobile formwork steel box girder trestle, including the front approach bridge, the rear approach bridge and the main bridge, and also includes the walking device for moving the trestle and the support for bearing the working weight of the trestle arranged under the main bridge device, the walking device includes a walking drive device arranged in front of the main bridge and a walking driven device arranged behind the main bridge, the supporting device is arranged at the front and rear ends of the main bridge, and the running device and supporting device are directly installed on the main bridge. on the bridge.

The walking device is arranged at the front and rear ends of the main bridge, and the supporting devices are also arranged at the front and rear ends of the main bridge. The area below the main bridge is the construction inverted arch concrete pouring area, that is, most of the areas below the trestle are construction areas, and the construction span Larger, and the length of the front approach bridge and the rear approach bridge at both ends of the main bridge will not increase with the length of the construction area, so that the trestle bridge has better stability, no need to use counterweights, and avoid overturning, while the walking device The supporting device and supporting device are directly installed on the main bridge, and the main bridge can be directly driven to move by operating the traveling driving device, and can be moved in place at one time, avoiding repeated operation of the traveling driving device, which ensures the high moving efficiency of the trestle. Finally, make the support device bear the load and working load of the trestle itself, so as to avoid damage caused by the load of the walking device.

As a preferred solution of the present utility model, the traveling driving device is a crawler front drive installed at the front end of the main bridge, and the traveling driven device is a traveling wheel installed at the rear end of the main bridge. The crawler front-drive method is mainly considered for the uneven excavation road surface. Taking advantage of the advantages of the crawler belt, it is very convenient to move forward and backward on the uneven excavation road surface. Overall move.

As a preferred solution of the present invention, the front drive of the crawler is an excavator chassis, and the chassis is equipped with a slewing support device. The use of mature excavator chassis on the market reduces the possibility of failure of the crawler front drive, thereby improving the reliability of the trestle. The configuration of the slewing support device facilitates the movement of the trestle in all directions, making the use of the trestle more flexible and free.

As a preferred solution of the present utility model, the supporting device is a telescopic load-bearing leg arranged at both ends of the trestle main bridge, and the load-bearing leg is connected with a hydraulic control device for controlling the expansion and contraction of the leg. During the use of the trestle bridge, the load-bearing outriggers are extended by hydraulic control and supported to the ground to bear the weight of the trestle bridge itself and the additional load of the bridge deck driving, so as to avoid the main load on the walking device composed of the front drive of the crawler and the road wheel When the trestle bridge moves, the load-bearing outriggers are retracted under the main bridge through hydraulic control, and they are at a certain height from the ground to facilitate the movement of the trestle bridge.

As a preferred solution of the present utility model, the number of the load-bearing legs is at least 4, and the number of the load-bearing legs is adapted to the designed load of the trestle bridge.

As a preferred solution of the present utility model, the supporting device is a telescopic load-bearing beam arranged at both ends of the trestle main bridge, and the load-bearing beam is connected with a hydraulic control device for controlling the vertical movement of the load-bearing beam. During the use of the trestle bridge, the load-bearing beam is extended by hydraulic control and supported to the ground to bear the weight of the trestle bridge itself and the additional load of the bridge deck driving, avoiding the main stress point of the walking device composed of the front drive of the crawler and the road wheel If it is damaged, when the trestle bridge moves, the load-bearing beam is retracted under the main bridge through hydraulic control, and it is at a certain height from the ground to facilitate the movement of the trestle bridge.

As a preferred solution of the present utility model, the trestle also includes a translation device for the left and right movement of the trestle, and the translation device is a translation oil cylinder arranged on the supporting device and connected with the main bridge. After the self-propelled inverted arch trestle is in place, the trestle is moved left and right by operating the translation cylinder. After the left and right movement is in place, the load-bearing legs or load-bearing beams are extended and supported to the ground through hydraulic control.

As a preferred solution of the present utility model, the self-propelled tunnel super-long inverted arch mobile formwork steel box girder trestle is provided with a vertical oil cylinder for lifting and lowering the trestle, and the vertical oil cylinder is arranged on the traveling device and connected with the main bridge connect. When moving the trestle, first raise the supporting device to support the walking device on the ground, and then operate the vertical oil cylinder to raise the trestle to a certain height, so as to ensure the safe movement of the trestle on the uneven excavation road, and avoid the lower part of the main bridge from the rough Ground contact affects the movement of the trestle.

As a preferred solution of the present utility model, the self-propelled tunnel ultra-long inverted arch mobile formwork steel box girder trestle is provided with an approach oil cylinder for lifting the front approach bridge and the rear approach bridge, the approach bridge oil cylinder is arranged at the bottom of the approach bridge, and the oil cylinder body of the approach bridge oil cylinder It is hingedly connected with the main bridge, and the piston rod is hingedly connected with the approach bridge. When the trestle needs to be moved, the approach bridge cylinder is used to raise the front approach bridge and the rear approach bridge to facilitate the movement of the trestle bridge.

As a preferred solution of the present utility model, the self-propelled tunnel ultra-long inverted arch mobile formwork steel box girder trestle is equipped with a hydraulic control system for controlling its movement and work, and the switches of the hydraulic control system are concentrated in the hydraulic station for controlling the bridge approach The lifting approach oil cylinder and the hydraulic control system used to control the inverted arch formwork and formwork under the trestle are connected to the hydraulic station. Connect to hydraulic station. Through the centralized operation of the hydraulic station, the trestle can be moved and stopped automatically, and the inverted arch formwork and formwork can be placed in place to pass the vehicle. At the same time, it can also realize the expansion and contraction of the load-bearing outriggers, and the automatic lifting and placement of the approach bridge, etc., without other activities. Machine Auxiliary Equipment.

In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

1. Set the walking device and supporting device of the trestle bridge at both ends of the main bridge, so that the area under the main bridge is the construction inverted arch concrete pouring area, which reduces the design length of the trestle bridge, and the structural stability of the trestle bridge is also better;

2. The crawler front-drive walking drive device is adopted to greatly improve the walking efficiency of the trestle bridge. At the same time, the advantage of the crawler belt to walk freely on the uneven excavation tunnel surface is fully utilized, so that the work of laying the trestle bridge on the uneven excavation tunnel surface becomes easier. It is easier and greatly reduces the workload of leveling the road surface;

3. The mature excavator chassis on the market is equipped with a slewing support device, which reduces the possibility of failure of the front drive of the crawler, improves the reliability of the trestle, and is simple and convenient to operate, and the work efficiency of the trestle is high. Equipped with a slewing support device , it is convenient for the trestle to move in all directions, and the use of the trestle is more flexible and free;

4. The self-propelled tunnel ultra-long inverted arch mobile formwork steel box girder trestle adopts full hydraulic control. Through centralized operation at the hydraulic station, the movement and work of the trestle are automatically controlled, and no other machine auxiliary equipment is required, and the operation is simple and convenient;

5. There is a translation oil cylinder on the trestle bridge, which can move the trestle bridge left and right to ensure that the trestle bridge is better set up in the construction area. At the same time, a vertical oil cylinder is set on the trestle bridge to ensure the safe movement of the trestle bridge on the uneven excavation road. , to prevent the lower part of the main bridge from contacting the rough ground and affecting the movement of the trestle bridge.

Description of drawings:

Fig. 1 is a structural schematic diagram of the self-propelled tunnel ultra-long inverted arch movable formwork steel box girder trestle bridge in embodiment 1.

Fig. 2 is a sectional view along line A-A in Fig. 1 .

Fig. 3 is a structural schematic diagram of the self-propelled tunnel ultra-long inverted arch movable formwork steel box girder trestle bridge in embodiment 2.

Fig. 4 is a sectional view along line B-B in Fig. 3 .

Marks in the picture: 1-front approach bridge, 2-rear approach bridge, 3-main bridge, 4-deck system, 5-track front drive, 6-traveling wheels, 7-load-bearing outriggers, 8-approach oil cylinder, 9-hydraulic station , 10-inverted arch formwork, 11-translation cylinder, 12-bearing beam, 13-vertical cylinder.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in detail.

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Example 1

This embodiment is used in the occasion where the concrete construction area needs to be filled across the inverted arch during tunnel construction.

As shown in Figures 1 and 2, a self-propelled tunnel super-long inverted arch mobile formwork steel box girder trestle includes a front approach bridge 1, a rear approach bridge 2 and a main bridge 3, and also includes a mobile bridge installed under the main bridge 3. The walking device of the trestle bridge and the supporting device for bearing the working weight of the trestle bridge, the walking device includes a walking driving device arranged in front of the main bridge 3 and a walking driven device arranged at the rear of the main bridge 3, and the supporting device is arranged on the main bridge 3. The front and rear ends of the bridge 3, the running gear and the support device are directly installed on the main bridge 3. The front approach bridge 1 is used to overlap to form a transition between the excavation front and the bridge deck system 4 of the main bridge 3, so that vehicles can smoothly travel back and forth between the bridge deck system 4 of the main bridge 3 and the excavation front, and the rear approach bridge 2 It is used to overlap to form a transition between the poured concrete and the bridge deck system 4 of the main bridge 3, so that vehicles can smoothly travel back and forth between the bridge deck system 4 and the poured concrete. The running gear and supporting device are arranged on the main bridge 3 The front and rear ends make the trestle have better stability. The trestle can avoid tilting during use and during the moving process. The walking device and supporting device are directly installed on the main bridge 3, and the driving device can be operated. Directly drive the main bridge 3 to move, and can move in place at one time. The area under the main bridge is the construction inverted arch concrete pouring area. The length of the front approach bridge 1 and the rear approach bridge 2 is relatively short. Less design materials, more economical and applicable.

The running device is a crawler front drive 5 installed at the front end of the main bridge and a walking wheel 6 installed at the rear end of the main bridge. The crawler front drive 5 is installed below the main bridge 3 near the front approach bridge 1 side, and the walking wheel 6 is installed on the main bridge. The 3 bottoms are close to the rear approach bridge 2 sides, and when the main bridge 3 moved, the walking wheels 6 traveled on the concrete surface that had been poured at the trestle rear. Using the crawler front drive 5 way, the movement efficiency of the trestle is higher, and the advantage of the crawler is fully utilized to pull the trestle forward and backward on the uneven excavation road. When the trestle bridge needs to move, the moving power is provided by the crawler belt front drive 5, which drives the walking wheels 6 arranged at the rear of the trestle bridge to make the trestle bridge move as a whole. In this embodiment, the crawler front drive 5 uses a mature excavator chassis on the market, and the chassis is equipped with a slewing support device. The use of the mature excavator chassis on the market reduces the possibility of failure of the crawler front drive 5, thereby improving the reliability of the trestle. The configuration of the slewing support device facilitates the movement of the trestle in all directions, making the use of the trestle more flexible and free.

The supporting device is load-bearing legs 7, and the load-bearing legs 7 are connected with a hydraulic control device for controlling the expansion and contraction of the legs. The number of load-bearing legs 7 is at least 4, and the design number of load-bearing legs 7 is equivalent to the load that the trestle bridge is designed to bear. Adaptation, the load-bearing outriggers 7 are arranged at both ends of the trestle main bridge. During the use of the trestle, the load-bearing legs 7 are lowered and supported on the ground to bear the weight of the trestle itself and the additional load acting on the trestle, avoiding the crawler The running gear that front drive 5 and road wheels 6 constitute become the main point of stress and are damaged. The self-propelled tunnel super-long inverted arch mobile formwork steel box girder trestle is equipped with approach cylinders 8 for lifting the front approach bridge and the rear approach bridge. The approach cylinder 8 of the front approach bridge 1 and the approach bridge cylinder 8 of the rear approach bridge 2 have the same structure. At the bottom of the approach bridge, the oil cylinder body of the approach bridge oil cylinder 8 is hingedly connected with the main bridge 3, and the piston rod of the oil cylinder is hingedly connected to the approach bridge. of the mobile.

The self-propelled tunnel ultra-long inverted arch mobile formwork steel box girder trestle is provided with a translation device for the trestle to move left and right. The translation device is a translation oil cylinder 11 arranged on the support device and connected with the main bridge. After the self-propelled inverted arch trestle moves in place, the trestle moves left and right by operating the translation cylinder 11. After the left and right movement is in place, the load-bearing outriggers 7 are extended and supported to the ground through hydraulic control, and the self-propelled tunnel super long inverted arch moves the template steel The box girder trestle is also provided with a vertical oil cylinder 13 for lifting and lowering the trestle, and the vertical oil cylinder 13 is arranged on the traveling device and connected with the main bridge. When moving the trestle, first raise the supporting device to support the walking device on the ground, and then operate the vertical oil cylinder 13 to raise the trestle to a certain height, thereby ensuring the safe movement of the trestle on the uneven excavation road surface and avoiding the collision between the lower part of the main bridge and the trestle. Rough ground contact affects the movement of the trestle.

The self-propelled tunnel ultra-long inverted arch mobile formwork steel box girder trestle is equipped with a hydraulic control system for controlling its movement and work. The inverted arch formwork 10 hanging under the trestle and the hydraulic control system for placing the formwork in place are all connected to the hydraulic station 9. At the same time, the hydraulic control system for controlling the walking and stopping of the trestle and for controlling the expansion and contraction of the load-bearing legs 7 is also connected to the hydraulic station 9. . Through centralized operation at the hydraulic station 9, the movement and stop of the trestle bridge, the hanging of the inverted arch formwork 10 and the formwork passing the vehicle in place are automatically realized. At the same time, activities such as the expansion and contraction of the load-bearing outrigger 7 and the automatic raising and placement of the approach bridge are realized. No other machine auxiliary equipment is required.

Self-propelled tunnel ultra-long inverted arch mobile formwork steel box girder trestles do not use longitudinal trusses. Most of the longitudinal trusses of trestles currently in use are factory-made structures. The problem of construction space. Without the use of longitudinal trusses, it has little impact on the implementation of the main functions of the trestle, but the construction cost is greatly saved, and the construction space is also more spacious. In the case of entering and evacuating the trestle, it avoids the trouble of dismantling. The application of the inverted arch mobile formwork steel box girder trestle is more convenient and quicker, and the main advantages of the trestle are fully utilized.

When this embodiment is in use, first perform concrete pouring preparation work such as clearing ballast at the bottom of the tunnel and bundling steel bars at a station, and when the concrete strength reaches the strength required by the design of the trestle bridge, the oil cylinder of the approach bridge is operated through the control system of the trestle hydraulic station to make the front approach bridge And the rear approach bridge is raised, and the load-bearing outriggers are operated to hydraulically control the oil circuit to raise the load-bearing outriggers to a certain height above the ground. The trestle moves to the concrete construction area filled with inverted arches, and then the trestle is moved left and right in place by operating the translation cylinder. Through the centralized control of the trestle hydraulic station, the inverted arch formwork is in place, the load-bearing legs are lowered, the weight of the trestle bridge borne by the front drive of the crawler and the walking wheels is transferred to the load-bearing legs, and then the front approach bridge and the rear approach bridge are lowered, and the mucking vehicle can be discharged Passing on the trestle bridge, after the concrete pouring of the inverted arch formwork under the main bridge is completed, when the concrete strength reaches the design requirements of the trestle bridge, the trestle bridge moves to the next station by repeating the above steps through the trestle hydraulic station control system.

Example 2

This embodiment is used in the occasion where the concrete construction area needs to be filled across the inverted arch during tunnel construction.

As shown in Figures 3 and 4, a self-propelled tunnel super-long inverted arch mobile formwork steel box girder trestle includes a front approach bridge 1, a rear approach bridge 2 and a main bridge 3, and also includes a mobile bridge installed under the main bridge 3. The walking device of the trestle bridge and the supporting device for bearing the working weight of the trestle bridge, the walking device includes a walking driving device arranged in front of the main bridge 3 and a walking driven device arranged at the rear of the main bridge 3, and the supporting device is arranged on the main bridge 3. The front and rear ends of the bridge 3 , the running gear and the supporting device are directly installed on the main bridge 3 . The front approach bridge 1 is used to overlap to form a transition between the excavation front and the bridge deck system 4 of the main bridge 3, so that vehicles can smoothly travel back and forth between the bridge deck system 4 of the main bridge 3 and the excavation front, and the rear approach bridge 2 It is used to overlap to form a transition between the poured concrete and the bridge deck system 4 of the main bridge 3, so that vehicles can smoothly travel back and forth between the bridge deck system 4 and the poured concrete. The running gear and supporting device are arranged on the main bridge 3 The front and rear ends make the trestle have better stability. The trestle can avoid tilting during use and during the moving process. The walking device and supporting device are directly installed on the main bridge 3, and the driving device can be operated. Directly drive the main bridge 3 to move, and can move in place at one time. The area under the main bridge is the construction inverted arch concrete pouring area. The length of the front approach bridge 1 and the rear approach bridge 2 is relatively short. Less design materials, more economical and applicable.

The running device is a crawler front drive 5 installed at the front end of the main bridge and a walking wheel 6 installed at the rear end of the main bridge. The crawler front drive 5 is installed below the main bridge 3 near the front approach bridge 1 side, and the walking wheel 6 is installed on the main bridge. The 3 bottoms are close to the rear approach bridge 2 sides, and when the main bridge 3 moved, the walking wheels 6 traveled on the concrete surface that had been poured at the trestle rear. Using the crawler front drive 5 way, the movement efficiency of the trestle is higher, and the advantage of the crawler is fully utilized to pull the trestle forward and backward on the uneven excavation road. When the trestle bridge needs to move, the moving power is provided by the crawler belt front drive 5, which drives the walking wheels 6 arranged at the rear of the trestle bridge to make the trestle bridge move as a whole. In this embodiment, the crawler front drive 5 uses a mature excavator chassis on the market, and the chassis is equipped with a slewing support device. The use of the mature excavator chassis on the market reduces the possibility of failure of the crawler front drive 5, thereby improving the reliability of the trestle. The configuration of the slewing support device facilitates the movement of the trestle in all directions, making the use of the trestle more flexible and free.

The supporting device is a load-bearing beam 12, which is connected with a hydraulic control device for controlling its expansion and contraction. The load-bearing beam 12 is arranged at both ends of the trestle main bridge. During the use of the trestle, the load-bearing beam 12 is put down and supported on the ground for To bear the weight of the trestle itself and the additional load acting on the trestle, to avoid damage to the walking device composed of the crawler front drive 5 and the traveling wheels 6 as the main stress point. The self-propelled tunnel super-long inverted arch mobile formwork steel box girder trestle is equipped with approach cylinders 8 for lifting the front approach bridge and the rear approach bridge. The approach cylinder 8 of the front approach bridge 1 and the approach bridge cylinder 8 of the rear approach bridge 2 have the same structure. At the bottom of the approach bridge, the oil cylinder body of the approach bridge oil cylinder 8 is hingedly connected with the main bridge 3, and the piston rod of the oil cylinder is hingedly connected to the approach bridge. of the mobile.

The self-propelled tunnel ultra-long inverted arch mobile formwork steel box girder trestle is provided with a translation device for the trestle to move left and right. The translation device is a translation oil cylinder 11 arranged on the support device and connected with the main bridge. After the self-propelled inverted arch trestle moves in place, the trestle moves left and right by operating the translation cylinder 11. After the left and right movement is in place, the load-bearing outriggers 7 are extended and supported to the ground through hydraulic control, and the self-propelled tunnel super long inverted arch moves the template steel The box girder trestle is also provided with a vertical oil cylinder 13 for lifting and lowering the trestle, and the vertical oil cylinder 13 is arranged on the traveling device and connected with the main bridge. When moving the trestle, first raise the supporting device to support the walking device on the ground, and then operate the vertical oil cylinder 13 to raise the trestle to a certain height, thereby ensuring the safe movement of the trestle on the uneven excavation road surface and avoiding the collision between the lower part of the main bridge and the trestle. Rough ground contact affects the movement of the trestle.

The self-propelled tunnel ultra-long inverted arch mobile formwork steel box girder trestle is equipped with a hydraulic control system for controlling its movement and work. The inverted arch formwork 10 hanging under the trestle and the hydraulic control system for placing the formwork in place are all connected to the hydraulic station 9. At the same time, the hydraulic control system for controlling the walking and stopping of the trestle and for controlling the expansion and contraction of the load-bearing legs 7 is also connected to the hydraulic station 9. . Through centralized operation at the hydraulic station 9, the movement and stop of the trestle bridge, the hanging of the inverted arch formwork 10 and the formwork passing the vehicle in place are automatically realized. At the same time, activities such as the expansion and contraction of the load-bearing outrigger 7 and the automatic raising and placement of the approach bridge are realized. No other machine auxiliary equipment is required.

Self-propelled tunnel ultra-long inverted arch mobile formwork steel box girder trestles do not use longitudinal trusses. Most of the longitudinal trusses of trestles currently in use are factory-made structures. The problem of construction space. Without the use of longitudinal trusses, it has little impact on the implementation of the main functions of the trestle, but the construction cost is greatly saved, and the construction space is also more spacious. In the case of entering and evacuating the trestle, it avoids the trouble of dismantling. The application of the inverted arch mobile formwork steel box girder trestle is more convenient and quicker, and the main advantages of the trestle are fully utilized.

When this embodiment is in use, first perform concrete pouring preparation work such as clearing ballast at the bottom of the tunnel and bundling steel bars at a station, and when the concrete strength reaches the strength required by the design of the trestle bridge, the oil cylinder of the approach bridge is operated through the control system of the trestle hydraulic station to make the front approach bridge And the rear approach bridge is raised, and the load-bearing outriggers are operated to hydraulically control the oil circuit to raise the load-bearing outriggers to a certain height above the ground. The trestle moves to the concrete construction area filled with inverted arches, and then the trestle is moved left and right in place by operating the translation cylinder. Through the centralized control of the trestle hydraulic station, the inverted arch formwork is in place, the load-bearing legs are lowered, the weight of the trestle bridge borne by the front drive of the crawler and the walking wheels is transferred to the load-bearing legs, and then the front approach bridge and the rear approach bridge are lowered, and the mucking vehicle can be discharged Passing on the trestle bridge, after the concrete pouring of the inverted arch formwork under the main bridge is completed, when the concrete strength reaches the design requirements of the trestle bridge, the trestle bridge moves to the next station by repeating the above steps through the trestle hydraulic station control system.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (10)

1. a self-propelled tunnel overlength inverted arch moving die plate steel box-girder trestle, including front access bridge, rear access bridge and main bridge, it is characterized in that, the running gear for movable trestle that also includes being arranged under main bridge and for bearing a support arrangement of trestle service weight, described running gear includes being arranged on the travel driving unit in main bridge front and being arranged on the walking slave unit at main bridge rear, described support arrangement is arranged on the rear and front end of main bridge, running gear and a support arrangement and is directly mounted on main bridge.

2. self-propelled tunnel according to claim 1 overlength inverted arch moving die plate steel box-girder trestle, it is characterised in that described travel driving unit is crawler belt forerunner, and described walking slave unit is road wheel.

3. self-propelled tunnel according to claim 2 overlength inverted arch moving die plate steel box-girder trestle, it is characterised in that described crawler belt forerunner is digging machine chassis, and chassis configuration slewing supporting device.

4. self-propelled tunnel according to claim 3 overlength inverted arch moving die plate steel box-girder trestle, it is characterized in that, described support arrangement is telescopic load-bearing supporting leg, is arranged in the main bridge two ends of trestle, and described load-bearing supporting leg is connected with the hydraulic control device for controlling its landing leg stretching.

5. self-propelled tunnel according to claim 4 overlength inverted arch moving die plate steel box-girder trestle, it is characterised in that the quantity of described load-bearing supporting leg is at least 4, the quantity of load-bearing supporting leg is suitable with trestle design bearing load.

6. self-propelled tunnel according to claim 3 overlength inverted arch moving die plate steel box-girder trestle, it is characterized in that, described support arrangement is telescopic spandrel girder, is arranged in the main bridge two ends of trestle, and described spandrel girder is connected with for controlling the hydraulic control device that its spandrel girder moves up and down.

7. the self-propelled tunnel overlength inverted arch moving die plate steel box-girder trestle according to claim 5 or 6, it is characterized in that, described self-propelled tunnel overlength inverted arch moving die plate steel box-girder trestle is provided with and carries out, for trestle, the translating device that moves left and right, and described translating device is the translation oil cylinder being arranged on a support arrangement and being connected with main bridge.

8. self-propelled tunnel according to claim 7 overlength inverted arch moving die plate steel box-girder trestle, it is characterized in that, described self-propelled tunnel overlength inverted arch moving die plate steel box-girder trestle is provided with the vertical oil cylinder for being promoted by trestle and reduce, and described vertical oil cylinder is arranged on running gear and is connected with main bridge.

9. self-propelled tunnel according to claim 8 overlength inverted arch moving die plate steel box-girder trestle, it is characterized in that, described self-propelled tunnel overlength inverted arch moving die plate steel box-girder trestle is provided with the access bridge oil cylinder for promoting front access bridge and rear access bridge, access bridge oil cylinder is arranged at bottom access bridge, the cylinder body of described access bridge oil cylinder and main bridge are articulated and connected, and piston rod is articulated and connected on access bridge.

10. self-propelled tunnel according to claim 9 overlength inverted arch moving die plate steel box-girder trestle, it is characterized in that, described self-propelled tunnel overlength inverted arch moving die plate steel box-girder trestle is provided with for controlling its hydraulic control system moving and working, the switch of hydraulic control system concentrates on Hydraulic Station, for controlling the access bridge oil cylinder of access bridge lifting and for controlling to hang inverted arch template under trestle and template hydraulic control system in place is all connected to Hydraulic Station, simultaneously, for controlling trestle walking, the hydraulic control system stopping and being used for controlling load-bearing landing leg stretching is also connected to Hydraulic Station.