CN114645619B - Construction method for integrally pulling Gamma steel strand of containment vessel of nuclear power station - Google Patents
Construction method for integrally pulling Gamma steel strand of containment vessel of nuclear power station Download PDFInfo
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- CN114645619B CN114645619B CN202210331690.3A CN202210331690A CN114645619B CN 114645619 B CN114645619 B CN 114645619B CN 202210331690 A CN202210331690 A CN 202210331690A CN 114645619 B CN114645619 B CN 114645619B
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- wire rope
- steel strand
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G2021/127—Circular prestressing of, e.g. columns, tanks, domes
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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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention discloses a construction method for integrally pulling a Gamma steel strand of a containment vessel of a nuclear power station. The invention solves the problems of steel strand waste and low construction efficiency, adopts the steel strand integral traction construction method, effectively improves the Gamma steel strand penetration efficiency and ensures the technical quality; the loss of the steel bar wire is reduced, the loss of materials is reduced, and the construction cost is reduced; the time of the construction key path occupied by the nuclear island prestress construction is reduced, the overall construction efficiency is improved, and effective guarantee is provided for the follow-up prestress construction.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method for integrally pulling a Gamma steel bundle steel strand of a containment vessel of a nuclear power station.
Background
At present, a double-shell structure is adopted in a third-generation nuclear power station, a prestressed reinforced concrete structure is adopted in an inner containment, the prestressed steel bundles comprise horizontal steel bundles, vertical steel bundles and Gamma steel bundles, one end of each Gamma steel bundle pipeline is anchored in a containment prestress gallery, the other end of each Gamma steel bundle pipeline is anchored in a dome ring beam, and the steel bundles are distributed in a Gamma-like shape.
Because the Gamma steel strand pipeline has the construction characteristics of long length, large bending radius of the dome part, multiple steel strand numbers and the like, if the traditional steel strand gradual strand penetrating process is adopted, when the steel strands pass through the dome and the equipment gate after penetrating into the pore canal, the steel strands cannot be smoothly penetrated into the pore canal by the strand penetrating machine when penetrating into the pore canal due to the factors of large change of the steel strand direction, irregular arrangement and the like in the pipeline, and because the Gamma steel strand opening direction of the ring beam part and the containment vessel body form an oblique angle downwards, the anchorage device and the clamping piece are difficult to install and reinforce and have larger installation safety risk, the steel strands which cannot be fully loaded by the steel strand penetrating equipment are pushed into the Gamma steel strand pipeline, the steel strand needs to be repeatedly wound back on site, the steel strand deformation and the like occur, and the problems of low site strand penetrating efficiency, high operation risk, large material loss and the like are caused.
Therefore, an integral traction construction method is needed to replace the traditional beam penetrating technology, so that the problems of steel strand waste and low construction efficiency caused by low beam penetrating efficiency and repeated disc returning of Gamma steel beam pipelines are effectively avoided.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a construction method for integrally pulling a Gamma steel strand of a containment vessel of a nuclear power station, which aims to solve the problems of steel strand waste and low construction efficiency.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the construction method for integrally pulling the Gamma steel strand of the containment vessel of the nuclear power station is characterized by comprising the following steps:
s1: the method comprises the steps of presetting an inner shell of a containment, presetting a plurality of prestress pipelines in a concrete structure of the inner shell of the containment, presetting a circle of prestress gallery at the lower end of the inner shell of the containment, and arranging a second winch in the prestress gallery, wherein the second winch is positioned at an outlet of the prestress pipelines; the outer side of the inner shell of the containment vessel is provided with a buttress column, the periphery of the buttress column is provided with a containment vessel outer shell, a circle of mounting platform is arranged on the outer ledge of the inner shell of the containment vessel through the buttress column and the containment vessel outer shell, a guide device is arranged on the mounting platform in a sliding manner, and the output end of the guide device corresponds to the inlet of the prestress pipeline; a suspension system is arranged on the outer wall of the inner shell of the containment vessel above the mounting platform and is used for placing steel strands; a first winch is arranged on the outer wall of the inner shell of the containment;
s2: transporting a plurality of steel strands to a suspension system, braiding the front ends of the plurality of steel strands, and arranging the steel strands into a guide head to form a group of steel strands;
s3: introducing a first steel wire rope of the first winch into the prestress pipeline through the guiding device, and connecting the first steel wire rope with a second steel wire rope of the second winch; pulling the second steel wire rope to the inlet of the prestressed pipeline;
s4: separating the first steel wire rope from the second steel wire rope, and fixedly connecting the second steel wire rope with the guide head after passing through the guide device;
s5: starting a second winch, integrally pulling a steel strand bundle positioned in a suspension system into a prestressed pipeline under the cooperation of a traction and guide device of a second steel wire rope, and fixing the steel strand bundle transported into the prestressed pipeline;
s6: and then repeating s2 to s5, and distributing the plurality of prestressed pipelines.
In order to optimize the technical scheme, the specific measures adopted further comprise:
further, the step S2 includes:
s21: the suspension system comprises a wiring pipe and a roller device, and a plurality of steel strands are transported into the wiring pipe for storage, wherein the wiring pipe is a storage pipeline; the front ends of the steel strands are bunched and arranged into a guide head;
s22: the first steel wire rope of the first winch is pulled by a guide wheel and pulley device and is fixedly connected with the guide head, the first winch is started again, the guide head is pulled, the steel strands are integrally pulled out of the wiring tube and are arranged on the roller device, the roller device is arranged below the wiring tube and is provided with rollers at intervals, and the steel strands are arranged on the rollers.
Further, the roller device is provided with rollers in the vertical and horizontal directions.
Further, in S21: the steel strands are transported to the wiring pipe for storage through the beam penetrating machine.
Further, the step S4 includes:
s41: a reinforcement is fixedly arranged at the tail end of the group of steel strand bundles;
s42: and separating the first steel wire rope from the second steel wire rope, fixedly connecting the first steel wire rope with the reinforcing device, and fixedly connecting the second steel wire rope with the guide head after passing through the guide device.
Further, the step S5 includes:
s51: starting a second winch, and integrally pulling a steel strand bundle positioned in a suspension system into a prestress pipeline under the cooperation of a traction and guide device of a second steel wire rope;
s52: simultaneously starting the first winch, and releasing the first steel wire rope by the first winch matched with the second winch to drag the whole steel strand bundle;
further, the reinforcement device comprises an anchor, a lifting unit, a pull ring and a fixed shell, wherein the anchor is provided with a plurality of through holes for placing steel strands, the outlet of the channel is provided with a fixing device, and the fixing device is used for fixing the placed steel strands; the anchor is fixedly connected with the fixed shell through a reinforcing bolt, and the fixed shell is provided with a lifting unit and a pull ring which are convenient to connect with a steel wire rope.
Further, the tail end of the through hole is provided with a flaring, and a clamping piece is arranged in the flaring and used as a fixing device.
Further, the reinforcement device further comprises a spring, and the spring is arranged at the joint of the anchor and the fixed shell.
Further, the first winch adopts an 8T winch, and the second winch adopts a 35T winch; the set of steel strand bundles includes 54 steel strands.
The beneficial effects of the invention are as follows:
the invention adopts the steel strand integral traction construction method, effectively improves the penetration efficiency of Gamma steel strand steel strands and ensures the technical quality; the loss of the steel bar wire is reduced, the loss of materials is reduced, and the construction cost is reduced; the time of the construction key path occupied by the nuclear island prestress construction is reduced, the overall construction efficiency is improved, and effective guarantee is provided for the follow-up prestress construction.
Drawings
FIG. 1 is a schematic view of an assembled structure of the present invention;
FIG. 2 is a schematic view of a partial use of the present invention;
FIG. 3 is a schematic view of the wiring tube structure of the present invention;
FIG. 4 is a schematic view of the bundling flow chart according to the present invention;
fig. 5 is a cross-sectional view of the reinforcement structure of the present invention.
Reference numerals: 1. the cable truck comprises a containment shell, 2 a containment inner shell, 3 a prestressed pipeline, 4 a mounting platform, 5 a platform support, 6 a guiding device, 7 a first winch, 71 a first wire rope, 8 a second winch, 81 a second wire rope, 9 a guiding wheel, 10 a suspension system, 101 a wire distribution pipe, 102 a roller device, 103 a clamping groove, 11 a steel strand, 12 a pulley device, 13 a sliding device, 14 a supporting device, 15 a reinforcing device, 151 an anchor, 152 a reinforcing bolt, 153 a lifting unit, 154 a pull ring, 155 a clamping piece, 156 a spring, 16 a buttress post and 17 a prestressed gallery.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings.
It should be noted that the terms like "upper", "lower", "left", "right", "front", "rear", and the like are also used for descriptive purposes only and are not intended to limit the scope of the invention in which the invention may be practiced, but rather the relative relationship of the terms may be altered or modified without materially altering the teachings of the invention.
Referring to the attached drawings, the construction method for integrally pulling the Gamma steel strand of the containment vessel of the nuclear power station is characterized by comprising the following steps:
s1: firstly, presetting a containment inner shell 2, wherein a concrete structure of the containment inner shell 2 is provided with a plurality of prestressed pipelines 3, the lower end of the containment inner shell 2 is preset with a circle of prestressed gallery 17, a second winch 8 is arranged in the prestressed gallery 17, and the second winch 8 is positioned at an outlet of the prestressed pipelines 3; the outer side of the inner containment shell 2 is provided with a buttress column 16, the periphery of the buttress column 16 is provided with a containment shell 1, a circle of mounting platform 4 is arranged on the outer side ledge of the inner containment shell 2 through the buttress column 16, the containment shell 1 and the platform support 5, the mounting platform 4 is provided with a guide device 6 in a sliding manner, and the sliding arrangement can be realized through a chute and other devices; the output end of the guiding device 6 is adjusted by a supporting device, and the supporting device can adopt a jack corresponding to the inlet of the prestressed pipeline 3; a suspension system 10 is arranged on the outer wall of the inner shell 2 of the containment vessel above the mounting platform 4, and the suspension system 10 is used for placing steel strands 11; a first winch 7 is arranged on the outer wall of the inner shell 2 of the containment;
s2: transporting a plurality of steel strands 11 to a suspension system 10, and braiding the front ends of the steel strands 11 and setting the steel strands into guide heads to form a group of steel strand bundles;
s3: introducing a first wire rope 71 of the first hoist 7 into the pre-stressing pipe 3 through the guide means 6 and connecting with a second wire rope 81 of a second hoist 8; pulling the second steel wire rope 81 to the inlet of the prestressed pipeline 3;
s4: a reinforcement 15 is fixedly arranged at the tail end of the group of steel strand bundles, so that the traction stability of the steel strand bundles is reinforced, the first steel wire rope 71 is separated from the second steel wire rope 81, the first steel wire rope 71 is fixedly connected with the reinforcement 15, and the second steel wire rope 81 is fixedly connected with the guide head after passing through the guide device 6;
s5: starting a second winch 8, and integrally pulling a steel strand bundle positioned in the suspension system 10 into the prestressed pipeline 3 under the cooperation of the traction and guide device 6 of the second steel wire rope 81; the first winch 7 cooperates with the second winch 8 to release the first steel wire rope 71, and the whole steel strand bundle is involved, so that the movement of the steel strand bundle is limited, and the steel strand bundle is prevented from falling down rapidly in the prestressed pipeline 3; afterwards, fixing the steel strand bundle transported into the prestressed pipeline 3;
s6: and then repeating s2 to s5, and distributing the plurality of prestressed pipelines 3.
In this embodiment, the S2 includes:
s21: the suspension system 10 comprises a wiring pipe 101 and a roller device 102, wherein a plurality of steel strands 11 are transported into the wiring pipe 101 for storage, and the wiring pipe 101 is a storage pipeline; the front ends of the steel strands 11 are bunched and arranged into guide heads, so that a group of steel strand bundles are formed, wherein the bunching and placing are facilitated due to the lack of a sliding device in the wiring tube 101;
s22: the first steel wire rope 71 of the first winch 7 is fixedly connected with the guide head through the traction of the guide wheel 9 and the pulley device 12, the first winch 7 is started again, the guide head is pulled, the steel wire harness is integrally pulled out of the wiring pipe 101 and placed on the roller device 102, the roller device 102 is arranged below the wiring pipe 101 and is provided with rollers at intervals, and the steel wire harness is placed on the rollers and conveniently moves along with the guide device 6 according to the position of the prestressed pipeline 3.
In this embodiment, the roller device 102 is provided with rollers in both vertical and horizontal directions to prevent damage during towing.
In this embodiment, in S21: the steel strands 11 are transported to the wiring pipe 101 by a strand breaker for storage.
In this embodiment, the reinforcement 15 includes an anchor 151, a lifting unit 153, a pull ring 154, and a fixing housing, where the anchor 151 is provided with a plurality of through holes for placing the steel strands 11, and an outlet of the passage is provided with a fixing device, and the fixing device is used for fixing the placed steel strands 11; the anchor 151 is fixedly connected with a fixed housing through a reinforcing bolt 152, and a lifting unit 153 and a pull ring 154 which are convenient to be connected with a steel wire rope are arranged on the fixed housing. The tail end of the through hole is provided with a flaring, a clamping piece 155 is arranged in the flaring and used as a fixing device, and the clamping piece 155 and the flaring are used for fixing the placed steel strand 11. The reinforcement 15 further comprises a spring 156, and the spring 156 is disposed at the joint of the anchor 151 and the fixed housing, so as to prevent the steel strand 11 from being damaged or slipped out due to excessive rigidity when being pulled.
In this embodiment, the first hoist 7 is an 8T hoist, and the second hoist 8 is a 35T hoist. The set of steel strand bundles includes 54 steel strands 11.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the invention without departing from the principles thereof are intended to be within the scope of the invention as set forth in the following claims.
Claims (10)
1. The construction method for integrally pulling the Gamma steel strand of the containment vessel of the nuclear power station is characterized by comprising the following steps:
s1: firstly, presetting a containment inner shell (2), presetting a plurality of prestress pipelines (3) in a concrete structure of the containment inner shell (2), presetting a circle of prestress corridor (17) at the lower end of the containment inner shell (2), arranging a second winch (8) in the prestress corridor (17), and positioning the second winch (8) at an outlet of the prestress pipelines (3); the outer side of the containment inner shell (2) is provided with a buttress column (16), the periphery of the buttress column (16) is provided with a containment outer shell (1), a circle of mounting platform (4) is arranged on the outer side ledge of the containment inner shell (2) through the buttress column (16) and the containment outer shell (1), a guide device (6) is arranged on the mounting platform (4) in a sliding manner, and the output end of the guide device (6) corresponds to the inlet of the prestressed pipeline (3); a suspension system (10) is arranged on the outer wall of the inner shell (2) of the containment vessel above the mounting platform (4), and the suspension system (10) is used for placing a steel strand (11); a first winch (7) is arranged on the outer wall of the inner shell (2) of the containment;
s2: transporting a plurality of steel strands (11) to a suspension system (10), and braiding the front ends of the steel strands (11) and setting the steel strands into guide heads to form a group of steel strand bundles;
s3: introducing a first wire rope (71) of the first winch (7) into the prestressed pipeline (3) through the guiding device (6) and connecting the first wire rope (81) with a second wire rope (81) of a second winch (8); then the second steel wire rope (81) is pulled to the inlet of the prestressed pipeline (3);
s4: separating the first steel wire rope (71) from the second steel wire rope (81), and fixedly connecting the second steel wire rope (81) with the guide head after passing through the guide device (6);
s5: starting a second winch (8), and integrally pulling a steel strand bundle positioned in a suspension system (10) into the prestressed pipeline (3) under the cooperation of a traction and guide device (6) of a second steel wire rope (81), and fixing the steel strand bundle transported into the prestressed pipeline (3);
s6: and then repeating s2 to s5, and distributing the prestressed pipes (3) uniformly.
2. The construction method for integrally pulling a Gamma steel strand of a containment vessel of a nuclear power plant according to claim 1, wherein the S2 comprises:
s21: the suspension system (10) comprises a wiring pipe (101) and a roller device (102), wherein a plurality of steel strands (11) are transported into the wiring pipe (101) for storage, and the wiring pipe (101) is a storage pipeline; the front ends of a plurality of steel strands (11) are bunched and arranged into a guide head;
s22: the first steel wire rope (71) of the first winch (7) is fixedly connected with the guide head through traction of the guide wheel (9) and the pulley device (12), the first winch (7) is started again, the guide head is pulled, the steel strands (11) are integrally pulled out of the wiring tube (101) and placed on the roller device (102), the roller device (102) is arranged below the wiring tube (101) and is provided with rollers at intervals, and the steel strands (11) are placed on the rollers.
3. The construction method for the whole traction of the Gamma steel strand of the containment vessel of the nuclear power plant according to claim 2, which is characterized by comprising the following steps: the roller device (102) is provided with rollers in the vertical and horizontal directions.
4. The construction method for whole traction of Gamma steel strand of containment vessel of nuclear power plant according to claim 3, wherein in S21: the steel strands (11) are transported to the wiring pipe (101) for storage through a beam penetrating machine.
5. The construction method for whole traction of Gamma steel strand of containment vessel of nuclear power plant according to claim 1 or 4, wherein S4 comprises:
s41: a reinforcement (15) is fixedly arranged at the tail end of the group of steel strand bundles;
s42: the first steel wire rope (71) is separated from the second steel wire rope (81), the first steel wire rope (71) is fixedly connected with the reinforcement (15), and the second steel wire rope (81) is fixedly connected with the guide head after passing through the guide device (6).
6. The construction method for integrally pulling a Gamma steel strand of a containment vessel of a nuclear power plant according to claim 5, wherein S5 comprises:
s51: starting a second winch (8), and integrally pulling a steel strand bundle positioned in a suspension system (10) into the prestressed pipeline (3) under the cooperation of a traction and guide device (6) of a second steel wire rope (81);
s52: simultaneously, the first winch (7) is started, and the first winch (7) is matched with the second winch (8) to release the first steel wire rope (71) so as to draw the whole steel wire harness.
7. The construction method for the whole traction of the Gamma steel strand of the containment vessel of the nuclear power plant according to claim 6 is characterized in that: the reinforcement device (15) comprises an anchor (151), a lifting unit (153), a pull ring (154) and a fixed shell, wherein the anchor (151) is provided with a plurality of through holes for placing the steel strands (11), the outlet of the through holes is provided with a fixing device, and the fixing device is used for fixing the placed steel strands (11); the anchor device (151) is fixedly connected with the fixed shell through a reinforcing bolt (152), and a hoisting unit (153) and a pull ring (154) which are convenient to be connected with a steel wire rope are arranged on the fixed shell.
8. The construction method for the whole traction of the Gamma steel strand of the containment vessel of the nuclear power plant according to claim 7 is characterized in that: the tail end of the through hole is provided with a flaring, and a clamping piece (155) is arranged in the flaring and used as a fixing device.
9. The construction method for the whole traction of the Gamma steel strand of the containment vessel of the nuclear power plant according to claim 8, which is characterized by comprising the following steps: the reinforcement (15) further comprises a spring (156), and the spring (156) is arranged at the joint of the anchor (151) and the fixed shell.
10. The construction method for the whole traction of the Gamma steel strand of the containment vessel of the nuclear power plant according to claim 9, which is characterized by comprising the following steps: the first winch (7) adopts an 8T winch, and the second winch (8) adopts a 35T winch; the set of steel strand bundles includes 54 steel strands (11).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210331690.3A CN114645619B (en) | 2022-03-31 | 2022-03-31 | Construction method for integrally pulling Gamma steel strand of containment vessel of nuclear power station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210331690.3A CN114645619B (en) | 2022-03-31 | 2022-03-31 | Construction method for integrally pulling Gamma steel strand of containment vessel of nuclear power station |
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| CN114645619A CN114645619A (en) | 2022-06-21 |
| CN114645619B true CN114645619B (en) | 2023-08-11 |
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| CN115045512B (en) * | 2022-07-20 | 2023-08-04 | 中国核工业二四建设有限公司 | Integral beam penetrating device and method for prestressed ultra-long circumferential steel beam of nuclear power station |
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| KR20040069656A (en) * | 2003-01-30 | 2004-08-06 | 노윤근 | Maintenance and reinforcing apparatus for section enlargement for reinforcing bearing power of pier in reinforced concrete bridge and construction method of repairing and reinforcing for section enlargement using the apparatus |
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