A lining trolley for extra-large cross-section diversion tunnels

Abstract

This utility model provides a lining trolley for extra-large cross-section diversion tunnels, including a track, traveling wheels, a steel truss, full-span scaffolding, a formwork erection and demolding drive assembly, and a top arch template assembly. The track is laid on the ground of the diversion tunnel, and its extension direction is consistent with the axis of the diversion tunnel. The steel truss travels on the track via the traveling wheels, and the steel truss serves as the main supporting foundation of the lining trolley. The full-span scaffolding is erected based on the steel truss. The formwork erection and demolding drive assembly is installed at the top of the full-span scaffolding and is used to drive the top arch template assembly to rise and fall. The top arch template assembly is installed at the top of the formwork erection and demolding drive assembly and serves as the support template for the top arch of the diversion tunnel. This trolley has the advantages of being suitable for use in extra-large cross-section diversion tunnels and having a relatively low construction cost.

Description

Technical Field

[0001] This utility model relates to the field of diversion tunnel construction technology, specifically to a lining trolley for a diversion tunnel with an extra-large cross-section. Background Technology

[0002] The technology of tunnel concrete lining has been used in my country for many years, from the initial scaffolding and formwork erection to the simple trolley lining, and then to the fully hydraulic automatic walking steel formwork trolley lining.

[0003] The initial method of erecting scaffolds and using formwork for lining was phased out due to its low efficiency, slow construction progress, and high labor intensity. Simple trolleys are generally designed with steel arch frames. These lining trolleys are typically used for short tunnel construction, especially for tunnels with complex planar and spatial geometry, frequent process changes, and strict process requirements. Fully hydraulic automatic walking steel formwork trolleys are mainly used for medium and long tunnel construction, where there are high requirements for construction progress and concrete surface quality. These lining trolleys are designed with integral steel formwork, hydraulic cylinders for demolding, and are supported by screw jacks during construction. They are automatically driven by electric reducers, and concrete is poured using concrete pumps.

[0004] In general, medium and long tunnels typically use fully hydraulic automatic walking steel formwork lining, while shorter tunnels use simple lining lining.

[0005] However, in the construction of some extra-large cross-section diversion tunnels, due to the excessive size requirements, ordinary fully hydraulic automatic walking steel formwork trolleys cannot meet the size requirements, while simple trolleys are insufficient to support the completion of the diversion tunnel operation length. Therefore, it is necessary to develop a diversion tunnel lining trolley specifically for extra-large cross-sections. Since it may be a disposable trolley, the cost should not be too high. Utility Model Content

[0006] The purpose of this utility model is to address the shortcomings of existing technologies by providing a lining trolley for extra-large cross-section diversion tunnels that is suitable for use in such tunnels and has a relatively low construction cost.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: a lining trolley for a large cross-section diversion tunnel, including a track, traveling wheels, steel truss, full-span scaffolding, formwork erection and demolding drive assembly, and top arch template assembly; The track is laid on the ground of the diversion tunnel, and the extension direction of the track is consistent with the axial direction of the diversion tunnel; The steel truss moves along the track by rolling wheels, and the steel truss serves as the main support foundation for the lining trolley. The full-span scaffolding is erected based on the steel truss; The formwork erection and demolding drive assembly is installed at the top of the full-span scaffold and is used to drive the arch formwork assembly to rise and fall. The top arch template assembly is installed at the top of the mold erection and demolding drive assembly and is used as a support template for the top arch of the diversion tunnel.

[0008] Preferably, a traveling beam is installed at the bottom end of the steel truss, and the traveling wheels are installed on the traveling beam.

[0009] Preferably, the crossbeams and longitudinal beams of the steel truss are all made of 25# I-beams.

[0010] Preferably, the steel truss is provided with diagonal bracing between the crossbeams and longitudinal beams, and the diagonal bracing is made of 20# channel steel.

[0011] Preferably, the steel truss is an inverted U-shaped support frame.

[0012] Preferably, the top of the full-span scaffolding is provided with I-beams for support in the area where the formwork erection and demolding drive components are installed.

[0013] Preferably, the mold erection and demolding drive components are several hydraulic jacks of the same specifications.

[0014] Preferably, an I-beam is connected to the top of the vertical mold and demolding drive assembly, and the I-beam is fixed to the bottom of the top arch template assembly.

[0015] Preferably, the support interface of the top arch formwork assembly is made of steel formwork.

[0016] Preferably, sleepers are provided on both sides of the track.

[0017] This utility model has substantial features and advancements compared to existing technologies. Specifically, based on the size and specifications of extra-large cross-section diversion tunnels, this utility model designs a lining trolley that combines six parts: a track, traveling wheels, a steel truss, full-span scaffolding, a top arch formwork assembly, and a formwork erection and demolding drive assembly. The traveling wheels are the trolley's moving mechanism; the steel truss is the support structure for the full-span scaffolding; the full-span scaffolding is the support structure for the top arch formwork assembly; the formwork erection and demolding drive assembly is the formwork erection and demolding mechanism for the top arch formwork system; and the top arch formwork system is the formwork for the concrete lining of the top arch. This trolley has a relatively simple structure, is capable of supporting extra-large cross-section diversion tunnels, and has a lower cost compared to fully hydraulic automatic traveling steel formwork trolleys, giving it application advantages. Attached Figure Description

[0018] Figure 1 This is a front view of a lining trolley for an extra-large cross-section diversion tunnel in this utility model.

[0019] Figure 2This is a side view of a lining trolley for an extra-large cross-section diversion tunnel according to this utility model.

[0020] In the diagram: 1. Track; 2. Traveling wheels; 3. Steel truss; 4. Full-span scaffolding; 5. Formwork erection and demolding drive assembly; 6. Top arch formwork assembly; 7. Traveling beam. Detailed Implementation

[0021] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0022] like Figure 1 and Figure 2 As shown, a lining trolley for an extra-large cross-section diversion tunnel includes a track 1, traveling wheels 2, steel truss 3, full-span scaffolding 4, formwork erection and demolding drive assembly 5, and top arch formwork assembly 6.

[0023] The track 1 is laid on the ground of the diversion tunnel, and the extension direction of the track 1 is consistent with the axial direction of the diversion tunnel. Sleepers are laid on both sides of the track 1.

[0024] The steel truss 3 rolls on the track 1 via the traveling wheels 2. The steel truss 3 serves as the main support foundation for the lining trolley, with a traveling beam 7 installed at its bottom. The traveling wheels 2 are mounted on the traveling beam 7 to ensure structural stability. In this embodiment, both the horizontal and vertical beams of the steel truss 3 are made of 25# I-beams. Diagonal braces made of 20# channel steel are provided between the horizontal and vertical beams of the steel truss. The steel truss as a whole forms an inverted U-shaped support frame.

[0025] The full-span scaffolding 4 is erected based on the steel truss 3 and serves as the supporting foundation for the top arch formwork assembly 6.

[0026] The formwork erection and demolding drive assembly 5 is installed at the top of the full-span scaffold 3 and is used to drive the arch formwork assembly 6 to rise and fall. In this embodiment, a hydraulic jack is used, which is supported by an I-beam and installed at the top of the full-span scaffold 3. Similarly, an I-beam is connected to the top of the formwork erection and demolding drive assembly 5, and the I-beam is fixed to the bottom of the arch formwork assembly 6 to ensure stable force during the erection and demolding processes of the arch formwork assembly 6.

[0027] The top arch template assembly 6 is installed at the top of the formwork erection and demolding drive assembly and is used as a support template for the top arch of the diversion tunnel. In this embodiment, the support interface of the top arch template assembly is made of steel template.

[0028] The lining trolley used in this design has been experimentally verified in the Julius Nyerere Hydropower Station project in Tanzania. The Julius Nyerere Hydropower Station is located on the Rufiji River in southeastern Tanzania. The Rufiji River is Tanzania's largest river, with a total drainage area of ​​177,000 km², stretching 700 km from Mbeya in the west to the Indian Ocean in the east. The power station project area is located in the Stiegler Gorge section of the lower Rufiji River, approximately 350 km by road from Dar es Salaam, the former capital of Tanzania. The diversion tunnel is located on the left bank of the Rufiji River, with a total length of 712.71 m, including a 50 m long inlet transition section. The actual net length of the standard cross-section of the diversion tunnel is 662.71 m.

[0029] Over six months of use, the project has achieved excellent results. Our company commenced the concrete lining construction of the diversion tunnel on August 1st and completed it entirely by October 30th, with 54 pouring sections completed, including 21 sections poured using self-made lining trolleys. During the diversion tunnel concrete lining construction, the concrete quality was excellent, with a smooth and even finish, and the construction progress was rapid, saving approximately 1.91 million yuan in costs. The concrete quality and construction progress met the owner's requirements, laying a solid foundation for the dam construction, including diversion, foundation excavation, and roller-compacted concrete construction, and received high praise from the owner and engineers.

[0030] Finally, it should be noted that: the preferred embodiments of this patent have been described in detail above, but this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A lining trolley for an extra-large cross-section diversion tunnel, characterized in that: This includes tracks, wheels, steel trusses, full-span scaffolding, formwork erection and demolding drive components, and arch formwork components; The track is laid on the ground of the diversion tunnel, and the extension direction of the track is consistent with the axial direction of the diversion tunnel; The steel truss moves along the track by rolling wheels, and the steel truss serves as the main support foundation for the lining trolley. The full-span scaffolding is erected based on the steel truss; The formwork erection and demolding drive assembly is installed at the top of the full-span scaffold and is used to drive the arch formwork assembly to rise and fall. The top arch template assembly is installed at the top of the mold erection and demolding drive assembly and is used as a support template for the top arch of the diversion tunnel.

2. The extra-large cross-section diversion tunnel lining trolley according to claim 1, characterized in that: The steel truss is fitted with a traveling beam at its bottom end, and the traveling wheels are mounted on the traveling beam.

3. The extra-large cross-section diversion tunnel lining trolley according to claim 1, characterized in that: The crossbeams and longitudinal beams of the steel truss are all made of 25# I-beams.

4. The extra-large cross-section diversion tunnel lining trolley according to claim 1, characterized in that: The steel truss is provided with diagonal bracing between the horizontal beams and the longitudinal beams, and the diagonal bracing is made of 20# channel steel.

5. The extra-large cross-section diversion tunnel lining trolley according to claim 1, characterized in that: The steel truss is an inverted U-shaped support frame.

6. The extra-large cross-section diversion tunnel lining trolley according to claim 1, characterized in that: The top of the full-span scaffolding, where the formwork erection and demolding drive components are installed, is supported by I-beams.

7. The extra-large cross-section diversion tunnel lining trolley according to claim 1, characterized in that: The mold erection and demolding drive components are several hydraulic jacks of the same specifications.

8. The extra-large cross-section diversion tunnel lining trolley according to claim 7, characterized in that: The top of the mold and demolding drive assembly is connected to an I-beam, which is fixed to the bottom of the top arch template assembly.

9. The extra-large cross-section diversion tunnel lining trolley according to claim 1, characterized in that: The support interface of the top arch formwork assembly is made of steel formwork.

10. The extra-large cross-section diversion tunnel lining trolley according to claim 1, characterized in that: Sleepers are installed on both sides of the track.

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