CN215718800U - Disassembly-free template structure for lining of hydraulic tunnel transition section - Google Patents
Disassembly-free template structure for lining of hydraulic tunnel transition section Download PDFInfo
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- CN215718800U CN215718800U CN202120308809.6U CN202120308809U CN215718800U CN 215718800 U CN215718800 U CN 215718800U CN 202120308809 U CN202120308809 U CN 202120308809U CN 215718800 U CN215718800 U CN 215718800U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model provides a disassembly-free template structure for a hydraulic tunnel transition section lining, which comprises a transition section steel pipe template (1) formed by rolling and welding a plurality of sections of steel plates, wherein the outer side of each section of steel pipe template is provided with a stiffening ring (2), the pipe wall of the transition section steel pipe template (1) is provided with a plurality of flat pressing holes (3), the transition section steel pipe template (1) is provided with a reinforcing plate (4) at the flat pressing holes (3), and the interior of the transition section steel pipe template (1) is detachably connected with a plurality of inner supports (5); the utility model has the advantages of simple and convenient construction, high efficiency and good concrete forming quality, and after the concrete pouring is finished, the steel pipe template can be permanently reserved as a part of the structure without being dismantled.
Description
Technical Field
The utility model relates to the technical field of hydraulic and hydroelectric engineering, in particular to a disassembly-free template structure for lining a hydraulic tunnel transition section.
Background
The gradual change section concrete lining is a common structure in hydraulic tunnels and is widely applied to parts such as an inlet section of a diversion tunnel of a hydropower station, an upstream and downstream connecting section of a gate shaft, an outlet section of a tailrace tunnel and the like. The water inlet and the opening of the gate slot are generally rectangular sections, the hydraulic tunnel connected with the water inlet and the gate slot is generally circular sections, and in order to ensure the hydraulic conditions and the stress requirements of the lining structure, the connecting section is generally designed into a square-to-circle gradual change structure for transition, and the length is generally not less than 1.5 times of the hole diameter.
The hydraulic tunnel transition section structure is a local structure with a relatively complex body type, and does not have the condition of lining by adopting a steel mould trolley compared with a full-length circular tunnel. At present, the formwork erection construction is carried out by adopting a method of adding a wooden formwork or a combined steel formwork into a support, the difficulty in manufacturing and constructing the formwork is high, the formwork needs to be dismantled after being used, the engineering construction progress is influenced, the appearance quality of the surface of the concrete at the gradual change section is not easy to guarantee, and the problems of slab staggering and the like are easily caused among the formworks.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a disassembly-free formwork structure for lining a hydraulic tunnel transition section, which has the advantages of simple and convenient construction, high efficiency and good concrete forming quality, and after concrete pouring is finished, a steel pipe formwork can be permanently reserved as a part of the structure and is free from disassembly.
Therefore, the utility model adopts the following technical scheme:
the utility model provides a disassembly-free template structure of hydraulic tunnel gradual change section lining cutting which characterized in that: the steel pipe formwork comprises a gradual change section steel pipe formwork formed by rolling, manufacturing and welding a plurality of steel plates, wherein a stiffening ring is arranged on the outer side of each section of steel pipe formwork, a plurality of flat pressing holes are formed in the pipe wall of the gradual change section steel pipe formwork, a stiffening plate is arranged at the flat pressing holes of the gradual change section steel pipe formwork, and a plurality of inner supports are detachably connected inside the gradual change section steel pipe formwork.
Further: the inner supports are radially arranged inside the transition section steel pipe template, one end of each inner support is connected with the inner wall of the transition section steel pipe template, and the other end of each inner support is fixedly connected with the inner wall of the transition section steel pipe template through a support ring.
Further: and a plurality of flat pressing holes are arranged on the pipe wall of each section of steel pipe template in a circle along the annular direction.
Further: and the flat pressing hole is plugged by adopting a temporary plug with an operation head before concrete pouring.
Further: the gradual change section steel pipe template can be kept permanently as a part of structure after concrete pouring is finished.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model has the advantages of simple and convenient construction, high efficiency and good concrete forming quality, and during the operation of the tunnel, the steel pipe template transmits the internal water pressure to the reinforced concrete structure, and the internal water pressure is mainly borne by the reinforced concrete structure and the surrounding rock; the steel pipe template does not bear external water pressure during tunnel maintenance through the flat pressing hole, and the problem that buckling instability of the transition section special-shaped steel lining structure is easy to occur under the action of external pressure is effectively solved.
2. Furthermore, the utility model can reduce the thickness of the steel pipe with the gradual change section as the template, is beneficial to saving investment and improving the economy. This template structure can satisfy the demand of tunnel normal operating and maintenance, need not to demolish after concrete placement accomplishes, saves the template and demolishs the time, effectively accelerates the construction progress. The inner surface of the steel pipe template with the gradual change section is used as an overflow surface, so that the water flow condition is facilitated, and the head loss is reduced.
Drawings
FIG. 1 is a schematic longitudinal section of the present invention;
FIG. 2 is an exemplary cross-sectional view of the present invention;
FIG. 3 is a schematic view of the assembly of a flat hole and a temporary plug.
The labels in the figures are: 1-a transition section steel pipe template; 2-a stiffening ring; 3-flattening the hole; 4-a stiffening plate; 5, internal support; 6-support ring; 7-temporary plug; 8-operating the head; 9-threaded hole.
Detailed Description
The utility model is further illustrated by the following figures and examples, which are not to be construed as limiting the utility model.
As shown in fig. 1-3, the disassembly-free template structure for the hydraulic tunnel transition lining provided by the utility model comprises a transition steel pipe template 1 formed by rolling and welding a plurality of sections of steel plates, each section of steel pipe template can be manufactured and delivered from a factory after steel plate scribing cutting, plate rolling and assembly welding in a steel pipe processing factory by directly utilizing equipment of a hydraulic power station engineering pressure steel pipe processing factory, the manufacturing and processing process is standardized and streamlined, a stiffening ring 2 is arranged outside each section of steel pipe template, a plurality of flat pressing holes 3 are circumferentially arranged on the pipe wall of each section of steel pipe template in a circle, the thickness of the transition steel pipe template 1 can be effectively reduced, the flat pressing holes 3 are formed by drilling by a drilling machine after the steel plates are rolled, and the outer water between the transition steel pipe template 1 and the concrete can be discharged through the flat pressing holes 3 during the emptying and overhauling, so that the transition steel pipe is not subjected to the outer water pressure; during the tunnel operation, water pressure to reinforced concrete structure in the transmission of gradual change section steel pipe formwork 1, gradual change section steel pipe formwork 1 sets up stiffening plate 4 in 3 departments of concora crush hole, and stiffening plate 4 sets up on the lateral wall of gradual change section steel pipe formwork 1, and a plurality of interior supports of 1 inside detachable connection of gradual change section steel pipe formwork 5.
After the steel pipe processing factory finishes the processing of the first section of steel pipe template, welding of the stiffening ring 2 is finished on the pipe wall of the first section of steel pipe template, then drilling of the flat pressing hole 3 is carried out on the pipe wall by adopting a drilling machine, and welding reinforcement is carried out on the hole opening part of the pipe wall by adopting a reinforcing plate 4 with the same strength, so that the manufacturing construction of the first pipe section is finished. The reinforcing plate 4 is provided with a threaded hole 9 coaxial with the flat pressing hole 3, and the aperture of the threaded hole 9 is smaller than that of the flat pressing hole 3.
And sequentially finishing the construction of a plurality of pipe joints in the steel pipe processing factory according to the construction sequence, and dragging and transporting each pipe joint to a construction site in the gradual change section hole to perform welding installation of the gradual change section steel pipe template 1 after each pipe joint is accepted and qualified.
The inner supports 5 are radially arranged inside the transition section steel pipe template 1, one end of each inner support is connected with the inner wall of the transition section steel pipe template 1, and the other end of each inner support is fixedly connected with the support ring 6. The inner support 5 is a conventional steel pipe and is arranged in the transition section steel pipe template 1 in a shape like a Chinese character 'mi'.
The length of each section of the steel pipe template of the gradual change section steel pipe template 1 is generally not more than 3 m.
The gradual change section steel pipe is welded installation in the hole to after installing corresponding interior support 5, adopt interim end cap 7 to carry out the shutoff to concora crush hole 3 before concreting, in order to prevent that concrete from flowing out from concora crush hole 3 drill way when concrete placement. The temporary plug 7 is provided with a screw and an operating head 8, the screw is in threaded connection with the threaded hole 9, the temporary plug 8 is accommodated in the flat pressing hole, the temporary plug 7 is installed from the inside of the gradual change section steel pipe template 1 to the outside, and the temporary plug 7 with the operating head 8 is arranged and can be conveniently screwed up for plugging.
Pouring concrete of the gradual change section, controlling the pouring speed of the concrete at two sides of the gradual change section steel pipe formwork 1, taking out the temporary plug 7 after the concrete reaches the required strength after the concrete is poured, and removing the inner support 5; the gradual change section steel pipe still can remain as a structure partly forever after pouring as the template when concrete placement, need not demolish, can effectively accelerate the construction progress to can satisfy the tunnel operation, overhaul needs.
One end of the transition section steel pipe template 1 is connected with a rectangular hole opening of a water inlet or a gate slot and the like, the other end of the transition section steel pipe template is connected with a circular hole opening of a hydraulic tunnel, and the section of the transition section steel pipe template 1 is a transition section curved surface from square to circular or from circular to square.
The above embodiment is merely a preferred embodiment of the present invention, and those skilled in the art will understand that modifications or substitutions of technical solutions or parameters in the embodiment can be made without departing from the principle and essence of the present invention, and all of them shall be covered by the protection scope of the present invention.
Claims (3)
1. The utility model provides a disassembly-free template structure of hydraulic tunnel gradual change section lining cutting which characterized in that: the steel pipe formwork comprises a gradual change section steel pipe formwork (1) formed by rolling a plurality of sections of steel plates in a welding mode, a stiffening ring (2) is arranged on the outer side of each section of steel pipe formwork, a plurality of flat pressing holes (3) are formed in the pipe wall of the gradual change section steel pipe formwork (1), a reinforcing plate (4) is arranged in each flat pressing hole (3) of the gradual change section steel pipe formwork (1), and a plurality of inner supports (5) are detachably connected inside the gradual change section steel pipe formwork (1).
2. The disassembly-free template structure for the hydraulic tunnel transition lining of claim 1, wherein: the inner supports (5) are radially arranged inside the transition section steel pipe template (1), one end of each inner support is connected with the inner wall of the transition section steel pipe template (1), and the other end of each inner support is fixedly connected with the support ring (6).
3. The disassembly-free template structure for the hydraulic tunnel transition lining of claim 1, wherein: and a plurality of flat pressing holes (3) are arranged on the pipe wall of each section of steel pipe template in a circle along the annular direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120308809.6U CN215718800U (en) | 2021-02-03 | 2021-02-03 | Disassembly-free template structure for lining of hydraulic tunnel transition section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120308809.6U CN215718800U (en) | 2021-02-03 | 2021-02-03 | Disassembly-free template structure for lining of hydraulic tunnel transition section |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215718800U true CN215718800U (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120308809.6U Active CN215718800U (en) | 2021-02-03 | 2021-02-03 | Disassembly-free template structure for lining of hydraulic tunnel transition section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215718800U (en) |
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2021
- 2021-02-03 CN CN202120308809.6U patent/CN215718800U/en active Active
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