CN217270219U - Concrete lining device for upper and lower bent sections of inclined shaft of diversion tunnel of hydropower station - Google Patents
Concrete lining device for upper and lower bent sections of inclined shaft of diversion tunnel of hydropower station Download PDFInfo
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- CN217270219U CN217270219U CN202121479659.1U CN202121479659U CN217270219U CN 217270219 U CN217270219 U CN 217270219U CN 202121479659 U CN202121479659 U CN 202121479659U CN 217270219 U CN217270219 U CN 217270219U
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Abstract
The utility model discloses a power station diversion tunnel inclined shaft section concrete lining device that bends from top to bottom belongs to hydraulic engineering concrete construction technical field. The concrete lining device for the upper and lower bent sections of the inclined shaft of the diversion tunnel of the hydropower station comprises a curved needle beam, a curved body template device is arranged on the outer surface of the curved needle beam in a sliding mode, and two ends of the curved needle beam are connected with the tunnel through supporting structures. The utility model discloses the technique is reliable, batch production makes, and the on-the-spot installation in the tunnel, and the construction work efficiency is high, and the progress is fast, and is with low costs, greatly reduced workman intensity of labour to mechanization level in the construction has been improved.
Description
Technical Field
The utility model relates to a hydraulic engineering concrete construction technical field especially relates to power station diversion tunnel inclined shaft upper and lower curved section concrete lining device.
Background
According to statistics, the water energy resource in China can be developed with the installed capacity of about 6.6 billion kw and the annual energy production of about 3 trillion kWh. The construction of pumped storage power stations in China starts from the late stage of the 60 s in the 20 th century, and the construction scale is small; in the 80 s of the 20 th century, with the construction of a large group of pumped storage power stations in the east areas such as Guangdong, east China, North China and the like, the pumped storage development of China is pushed to a new height. As of 2017, the installed capacity of the pumped storage power station in China is the first in the world, the on-stream scale is 2849 ten thousand kilowatts, and the on-stream scale is 3871 thousand kilowatts. By 2020, the total capacity of operation reaches 4000 ten thousand kilowatts. According to the requirement of national energy development planning of thirteen five, during the thirteen five period, the pumping and the energy storage are newly started, and 6000 ten thousand kilowatts are stored; about 9000 ten thousand kilowatts are achieved by 2025 years; conventional hydropower stations and pumped storage power stations have wide prospects.
In the construction of hydropower stations in China, the diversion type power stations occupy a considerable proportion. The water diversion tunnel is used as a part of a water pumping and energy storage power station water charging and discharging system and comprises a water conveying inclined shaft and a vertical shaft. The inclined straight section of the inclined shaft and the vertical section of the vertical shaft are well applied by adopting a slip form technology, and the concrete rapid lining technology of the upper and lower bent sections of the inclined shaft or the vertical shaft is not well solved all the time, so that the method becomes a technical problem of hydropower station construction.
The traditional technical method comprises the steps of manufacturing curved surface wood templates with curved nails in a processing plant, manually erecting the templates and pouring concrete. The technology and the method are old, labor intensity is high during construction, construction period is long, cost is high, and safety risk is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving prior art, in the construction of the section of bending from top to bottom of oblique, the shaft of power station drainage tunnel, concrete lining method obsolete, intensity of labour is big during the construction, the time limit for a project is long, the cost is big, the problem that the safety risk is high, and the power station drainage tunnel oblique well section of bending from top to bottom concrete lining device that provides.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the concrete lining device for the upper and lower bent sections of the inclined shaft of the diversion tunnel of the hydropower station comprises a curved needle beam, wherein a curved body template device is arranged on the outer surface of the curved needle beam in a sliding manner, and two ends of the curved needle beam are connected with the tunnel through a supporting structure;
the curvature of the curved needle beam is consistent with the central radius and curvature of the tunnel; the length of the curved needle beam is more than twice of that of the curved template device.
Preferably, the curved needle beam is of a square steel truss structure.
Preferably, the two ends of the curved needle beam are respectively provided with a group of supporting structures; one group of the supporting structures are arranged on the wall of the lined cast concrete, and the other group of the supporting structures are arranged on the wall of the excavated tunnel.
Preferably, the supporting structure is composed of a plurality of jacks, and the jacks are arranged on the upper side, the lower side, the left side and the right side of the curved needle beam.
Preferably, the outer surface of the jack is rotatably connected with an adjustable screw rod, and the other end of the adjustable screw rod is rotatably connected with the outer surface of the curved needle beam.
Preferably, the curved template device consists of a curved template block and a template trolley, the template trolley is arranged on the outer surface of the curved needle beam and slides, and the curved template block is connected with the template trolley through a jack.
Preferably, the curved formwork block is formed by splicing four blocks, and the curved formwork block can extend and expand the formwork surface or contract and demold under the telescopic action of the jack.
Preferably, the inner side surface of the curved template device is provided with a pouring hole penetrating to the outer side; the pouring hole is arranged close to the highest point of the curved template device in the installation state.
Preferably, a first winch is arranged at the front end of the curved needle beam in the moving direction, the first winch is fixedly arranged on the excavated tunnel rock wall, and the first winch pulls the curved needle beam through a rope.
Preferably, a second winch is arranged on one side of the front end of the curved needle beam in the moving direction, and the second winch pulls the curved body template device through a rope.
Compared with the prior art, the utility model provides a power station diversion tunnel inclined shaft section concrete lining device that bends from top to bottom possesses following beneficial effect:
1. the utility model discloses, the technique is reliable, batch production makes, and the on-the-spot installation in the tunnel, and the construction work efficiency is high, and the progress is fast, and is with low costs, greatly reduced workman intensity of labour to mechanization level in the construction has been improved.
2. The curved body template device is sleeved on the curved needle beam, and the curved needle beam and the curved body template device respectively move along with the mechanical traction of the first winch and the second winch, so that short segments can be recycled; when the radiuses of the upper bending section and the lower bending section are consistent, the turning is turned over to realize the mutual use, and the construction cost is further saved.
3. The utility model uses steel to replace wood, saves a large amount of wooden templates, has high reusability, and is safe and environment-friendly; compared with the erection and disassembly construction of a support wooden template, the concrete lining construction integrally walking in place has low safety risk.
The part of the device which is not involved is the same as the prior art or can be realized by the prior art, the utility model has the advantages of reliable technology, factory manufacture, field installation in the tunnel, high construction efficiency, fast progress and low cost, greatly reduces the labor intensity of workers, and improves the mechanization level in construction; the curved body template device is sleeved on the curved needle beam, and the curved needle beam and the curved body template device respectively move along with the mechanical traction of the first winch and the second winch, so that short-segment multi-cycle use can be realized; when the radiuses of the upper bending section and the lower bending section are consistent, the turning is realized for mutual use, and the construction cost is further saved; the steel is used for replacing wood, a large amount of wood templates are saved, the reusability is high, and the method is safe and environment-friendly; compared with the erection and dismantling construction of a support wooden template, the concrete lining construction integrally walking in place has low safety risk.
Drawings
FIG. 1 is a schematic view of the usage state of the present invention;
FIG. 2 is a schematic view of the present invention in a usage status at a downward bending part;
FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;
FIG. 4 is a schematic structural view of a curved needle beam;
FIG. 5 is a schematic view of a partial cross-sectional structure of a curved template device;
FIG. 6 is a schematic view of a partial cross-sectional structure of the curved needle beam and curved body template assembly;
FIG. 7 is a schematic cross-sectional view taken at B-B in FIG. 4;
FIG. 8 is a schematic cross-sectional view at C-C in FIG. 2;
FIG. 9 is a schematic view of the structure of the curved template device in a contracted state;
fig. 10 is a schematic view of the structure of the upper bent portion of the present invention in use.
In the figure: 1. a curved needle beam; 2. a curved body template device; 201. a bending template block; 202. a template trolley; 3. a support structure; 4. a jack; 5. an adjustable lead screw; 6. a first winch; 7. a second winch.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Referring to fig. 1-10, the concrete lining device for the upper and lower bent sections of the diversion tunnel inclined shaft of the hydropower station comprises a curved needle beam 1, a curved template device 2 is slidably arranged on the outer surface of the curved needle beam 1, and two ends of the curved needle beam 1 are connected with the tunnel through a support structure 3. The curvature of the curved needle beam 1 is consistent with the central radius and curvature of the tunnel; the supporting structures 3 at the two ends adjust the axis of the curved needle beam 1 to the axis of the tunnel to coincide with each other; the curved template device 2 slides along the curved needle beam 1 to complete template support and concrete pouring construction at different positions.
The length of the curved needle beam 1 is more than twice of that of the curved template device 2. Preferably, the length of the curved needle beam 1 is set to be between two and three times that of the curved template device 2. If the length of the curved needle beam 1 is set to be too large, the installation difficulty is increased; at the same time, the required manufacturing material consumption is increased. The length of the curved needle beam 1 is set to be more than twice of that of the curved template device 2, so that the curved template device 2 can move on the curved needle beam 1 after a section of poured template support is finished, and the curved needle beam can move to the next concrete pouring section for template support; provides relative movement support for the curved needle beam 1 and the curved body template device 2.
The curved needle beam 1 adopts a square steel truss structure; by utilizing the characteristics of the steel truss structure, the steel truss has enough supporting strength and lower weight; meanwhile, the disassembly and assembly are convenient. After each part is processed in a factory, the parts are preliminarily assembled outside; conveying the tunnel into the tunnel, and finally assembling; moreover, each part is simple and convenient to process and operate and strong in reusability; compared with the traditional construction, a large amount of wood boards are needed, and the method is economical and environment-friendly.
The supporting structures 3 are respectively arranged at two ends of the curved needle beam 1 in a group. Wherein, a group of supporting structures 3 are arranged on the hole wall lined with the cast concrete; and the other group of support structures 3 are arranged on the excavated tunnel rock wall, namely the front end of the moving direction of the curved needle beam 1. The two supporting structures 3 are arranged to provide a supporting function, the curved needle beams 1 are supported from two ends, and the curved needle beams 1 in the middle part form a moving track of the curved template device 2; in the mounting of the support structure 3, the position is adjusted precisely so that the needle beam axis coincides with the tunnel axis.
Specifically, the supporting structure 3 is composed of a plurality of jacks 4, and the plurality of jacks 4 are arranged on the upper side, the lower side, the left side and the right side of the curved needle beam 1 to provide stable support. Therefore, the curved needle beam 1 and the inner wall of the tunnel are both of arc-surface structures, and a cushion block needs to be arranged in the installation process of the jack 4 so as to be installed stably. Preferably, at least two jacks 4 are arranged on the lower side of the curved needle beam 1 to form a group, so that not less than two supporting points are increased, and better stability is achieved.
Furthermore, the outer surface of the jack 4 is rotatably connected with an adjustable screw rod 5, and the other end of the adjustable screw rod 5 is rotatably connected with the outer surface of the curved needle beam 1; at least two adjustable screw rods 5 are matched and arranged on one jack 4. The adjustable screw rod 5 is arranged, so that the adjusting range with higher precision is achieved; and, the stability of the support is further improved. The adjustable screw rod 5 is connected with the curved needle beam 1 and the jack 4 in a rotating way, and connecting plates with holes are respectively and fixedly connected on the outer surface of the jack 4 and the outer surface of the curved needle beam 1; the rotating shaft is inserted in the connecting plate and penetrates through the adjustable screw rod 5, and the adjustable screw rod 5 is rotatably connected with the connecting plate. Preferably, two connecting plates are symmetrically arranged on two sides of one end of the adjustable screw rod 5, so that the strength and the stability are improved.
The curved template device 2 consists of a curved template block 201 and a template trolley 202, wherein the template trolley 202 is arranged on the outer surface of the curved needle beam 1 to slide, and the curved template block 201 is connected with the template trolley 202 through a jack 4. The template trolley 202 adopts a steel truss structure and is sleeved on the outer surface of the curved needle beam 1. For the sliding mode, a sliding rail can be arranged on the outer surface of the curved needle beam 1, the template trolley 202 is provided with corresponding moving wheels, and grease is coated on the sliding rail for lubrication, so that the friction force is reduced; the pattern board carriage 202 slides along the curved needle beam 1. After sliding to the set position, the position of the template carriage 202 is locked.
Wherein, the curved template block 201 is formed by splicing four blocks; the bent template block 201 can extend and expand the template surface or contract and demold under the telescopic action of the jack 4; in the opened state, the curved template block 201 is consistent with the tunnel lining structural surface.
Specifically, the curvature of the curved template block 201 is designed to be consistent with the curvature of the tunnel; and the upper and lower blocks and the left and right blocks are arranged in a staggered way when stretching.
One of the curved template blocks 201 is arranged in a manner that the left and right sections of the upper and lower curved template blocks 201 are vertical surfaces; when the formwork surface is opened, the left and right bent formwork blocks 201 are stretched first, and then the upper and lower bent formwork blocks 201 are stretched; when the template surface is contracted, the upper and lower curved template blocks 201 are firstly withdrawn, and then the left and right curved template blocks 201 are withdrawn. Similarly, the two cross sections of the upper and lower curved template blocks 201 may be in other forms such as horizontal planes, so as to realize the staggered arrangement during extension and retraction.
And a pouring hole penetrating to the outer side is formed in the inner side surface of the curved template device 2. The pouring hole is arranged close to the highest point of the curved template device 2 in the installation state; so as to convey the concrete inwards from the pouring holes after the curved formwork device 2 is installed in place; the position close to the highest point can complete pouring at one time.
Meanwhile, the pouring holes can also be arranged at different elevation positions of the curved template device 2, and a plurality of pouring holes are arranged for pouring layer by layer from bottom to top; and (4) plugging the pouring hole of the layer before the pouring of one layer is finished and the next layer is poured. The multiple pouring holes are formed, so that the pouring compactness and the pouring effect can be further improved.
A first winch 6 is arranged at the front end of the curved needle beam 1 in the moving direction, and the first winch 6 is fixedly arranged on the excavated tunnel rock wall; the first winch 6 pulls the curved needle beam 1 by a rope to move.
A second winch 7 is arranged on one side of the front end of the curved needle beam 1 in the moving direction, and the second winch 7 pulls the curved template device 2 to move through a rope.
In specific use, after the concrete lining of one section of tunnel is poured and reaches a certain strength, the jack 4 between the curved template block 201 and the template trolley 202 retracts to perform demoulding. After demolding, the second winch 7 pulls the curved formwork device 2 to move forwards on the curved needle beam 1, and the curved formwork device 2 is moved to the next concrete pouring section from one concrete pouring section. After the second concrete bin of the tunnel is poured, retracting the supporting structures 3 at the two ends of the curved needle beam 1 to keep the curved template device 2 in an unfolded state; the first winch 6 arranged at the front end of the tunnel lining is used for pulling the curved needle beam 1 to move forwards, and the adjustment in the movement is consistent with the axis of the tunnel. After moving for a distance greater than one concrete lining section, extending out of the supporting structure 3 and fixing with the tunnel; thereafter, the curved body template device 2 is moved. And (5) performing reciprocating circulation to finish the concrete lining of the whole bent section.
Referring to fig. 1, the left and right frames show the schematic views of the usage status of the downward bending part and the upward bending part, respectively. When the diameters and the turning radiuses of the upper and lower bent sections of the inclined and vertical shafts of the diversion tunnel are consistent, the curved needle beam 1 and the curved body template device 2 are turned over for 180 degrees, and the installation positions of the first winch 6 and the second winch 7 are correspondingly adjusted, so that the diversion tunnel and the vertical shaft can be used mutually.
In the specific construction, firstly, a curved needle beam 1 and a curved template device 2 are designed according to the shape and the size of the tunnel; the upper and lower bending sections of the inclined and vertical shaft of the diversion tunnel of the hydropower station are similar to a part of a full-air round tire with the radius consistent with that of the tunnel, the curve needle beam 1 is of a curved body structure with a small center, and the curved body template device 2 is sleeved outside the curve needle beam 1 and is of a large curved body structure. After the design is finished, processing in a factory, and carrying out primary assembly according to the size of each part; and (5) carrying out final assembly after the steel pipe is conveyed to a construction site. Before the installation of the curved needle beam 1, the reinforcement binding construction of the tunnel bending section is firstly carried out. After the steel bars are bound, an operator firstly fixedly installs a first winch 6 in the tunnel; the curved needle beam 1 in the traction installation provides forward and upward tension. After the curve needle beam 1 is assembled, the supporting structure 3 located at the front end in the moving direction is installed on the excavated tunnel rock wall, the supporting structure 3 located at the rear end is installed on the tunnel wall lined with the cast concrete, and the curve needle beam 1 is adjusted to be consistent with the tunnel axis. Thereafter, the curved body pattern plate device 2 is mounted on the curved needle beam 1, and the position of the curved body pattern plate device 2 is adjusted by the second winding machine 7. After the position is determined, the curved body template device 2 is stretched to be supported; and the two ends of the template are closed and reinforced by the aid of the planks in a top pulling manner, so that the template is prevented from overflowing during concrete pouring. Then, feeding concrete through the arranged pouring holes to finish pouring; and pouring the bottom, the middle and the top. In the pouring process, a concrete pouring cupola pipe can be arranged at a pouring opening so as to pump concrete into a warehouse; and, set up the manual gate valve that closes in the inboard one end of the pipe of washing the sky that is located the template, do benefit to the concrete placement and accomplish the back, in time close the hole of washing the sky when dismantling the pump line, prevent that the concrete that has just pour into the storehouse from flowing out.
The utility model provides a curved needle beam 1 for concrete lining of the upper and lower bending sections of the inclined and vertical shafts of the circular diversion tunnel of the hydropower station, a curved template device 2 and a concrete lining construction method using the device, which successfully solve the difficult problems which disturb hydropower construction technology for many years; the device and the construction method have the advantages of reliable technology, factory manufacturing, field installation in the tunnel, fast progress, low cost, greatly reduced labor intensity of workers and low safety risk; and improves the mechanization level in construction.
The utility model adopts the square steel truss curved needle beam 1, which is consistent with the axial radius of the inclined and vertical shaft upper and lower bending sections of the diversion circular tunnel, thus realizing the position movement in the construction; the curved template device 2 is designed and manufactured into a spatial curved structure, namely a circular ring body with part of the same radius, the radius of the circular ring body is consistent with the radius and curvature of the upper and lower curved sections of the inclined and vertical wells, and the part of the circular ring body, which is similar to a circular tire body filled with air, is matched with the inner wall of a tunnel; the curved body template device 2 is sleeved on the curved needle beam 1, and the curved needle beam 1 and the curved body template device 2 move along with the mechanical traction of the first winch 6 and the second winch 7 respectively to realize the support and the movement of the lining template.
The utility model adopts the steel curved needle beam 1 and the curved template device 2 to replace wood with steel, thereby saving a large amount of wooden templates, having high reusability, safety and environmental protection; the method has the advantages of factory production, field installation, high construction efficiency and fast progress; the curved needle beam 1 is matched with the curved template device 2, so that short-section multi-cycle use can be realized; when the radiuses of the upper bending section and the lower bending section are consistent, the turning is realized for mutual use, and the construction cost is further saved; compared with the erection and disassembly construction of a support wooden template, the concrete lining construction integrally walking in place has low safety risk.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (10)
1. The concrete lining device for the upper and lower bent sections of the inclined shaft of the diversion tunnel of the hydropower station is characterized by comprising a curved needle beam (1), wherein a curved body template device (2) is arranged on the outer surface of the curved needle beam (1) in a sliding manner, and two ends of the curved needle beam (1) are connected with the tunnel through a supporting structure (3);
the curvature of the curved needle beam (1) is consistent with the central radius and curvature of the tunnel; the length of the curved needle beam (1) is more than twice of that of the curved template device (2).
2. The concrete lining device for the upper and lower bent sections of the diversion tunnel inclined shaft of the hydropower station according to claim 1, wherein the curved needle beam (1) adopts a square steel truss structure.
3. The concrete lining device for the upper and lower bent sections of the diversion tunnel inclined shaft of the hydropower station according to claim 1, wherein the support structures (3) are respectively provided in a group at two ends of the curved needle beam (1); one group of the supporting structures (3) is arranged on the wall of the lined cast concrete, and the other group of the supporting structures (3) is arranged on the rock wall of the excavated tunnel.
4. The concrete lining device for the upper and lower bent sections of the diversion tunnel inclined shaft of the hydropower station according to claim 3, wherein the supporting structure (3) is composed of a plurality of jacks (4), and the plurality of jacks (4) are arranged on the upper, lower, left and right sides of the curved needle beam (1).
5. The concrete lining device for the upper and lower bent sections of the diversion tunnel inclined shaft of the hydropower station according to claim 4, wherein an adjustable screw rod (5) is rotatably connected to the outer surface of the jack (4), and the other end of the adjustable screw rod (5) is rotatably connected with the outer surface of the curved needle beam (1).
6. The concrete lining device for the upper and lower bent sections of the diversion tunnel inclined shaft of the hydropower station according to claim 1, wherein the curved body template device (2) is composed of a curved body template block (201) and a template trolley (202), the template trolley (202) is arranged on the outer surface of the curved needle beam (1) to slide, and the curved body template block (201) is connected with the template trolley (202) through a jack (4).
7. The concrete lining device for the upper and lower bent sections of the diversion tunnel inclined shaft of the hydropower station according to claim 6, wherein the curved formwork block (201) is formed by splicing four blocks, and the curved formwork block (201) can stretch and expand a formwork surface or contract and demold under the telescopic action of the jack (4).
8. The concrete lining device for the upper and lower bent sections of the diversion tunnel inclined shaft of the hydropower station according to claim 1, wherein a pouring hole penetrating to the outer side is formed in the inner side surface of the bent body template device (2); the pouring hole is arranged close to the highest point of the curved template device (2) in the installation state.
9. The concrete lining device for the upper and lower bent sections of the diversion tunnel inclined shaft of the hydropower station according to claim 1, characterized in that a first winch (6) is arranged at the front end of the moving direction of the curved needle beam (1), the first winch (6) is fixedly arranged on the excavated tunnel rock wall, and the first winch (6) pulls the curved needle beam (1) through a rope.
10. The concrete lining device for the upper and lower bent sections of the diversion tunnel inclined shaft of the hydropower station according to claim 1, wherein a second winch (7) is arranged on one side of the front end of the curved needle beam (1) in the moving direction, and the second winch (7) pulls the curved body formwork device (2) through a rope.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121479659.1U CN217270219U (en) | 2021-06-30 | 2021-06-30 | Concrete lining device for upper and lower bent sections of inclined shaft of diversion tunnel of hydropower station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121479659.1U CN217270219U (en) | 2021-06-30 | 2021-06-30 | Concrete lining device for upper and lower bent sections of inclined shaft of diversion tunnel of hydropower station |
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| CN217270219U true CN217270219U (en) | 2022-08-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113279784A (en) * | 2021-06-30 | 2021-08-20 | 中电建十一局工程有限公司 | Concrete lining device for upper and lower bent sections of inclined shaft of diversion tunnel of hydropower station |
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2021
- 2021-06-30 CN CN202121479659.1U patent/CN217270219U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113279784A (en) * | 2021-06-30 | 2021-08-20 | 中电建十一局工程有限公司 | Concrete lining device for upper and lower bent sections of inclined shaft of diversion tunnel of hydropower station |
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