CN111075235A - Construction method of passive water tank of nuclear power plant - Google Patents
Construction method of passive water tank of nuclear power plant Download PDFInfo
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- CN111075235A CN111075235A CN202010025772.6A CN202010025772A CN111075235A CN 111075235 A CN111075235 A CN 111075235A CN 202010025772 A CN202010025772 A CN 202010025772A CN 111075235 A CN111075235 A CN 111075235A
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- E—FIXED CONSTRUCTIONS
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- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
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- E—FIXED CONSTRUCTIONS
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- 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
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- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H7/00—Construction or assembling of bulk storage containers employing civil engineering techniques in situ or off the site
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Abstract
The invention discloses a construction method of a nuclear power plant passive water tank, which comprises the following steps: prefabricating a supporting steel structure module, a bottom floor slab semi-steel plate concrete structure module, a stainless steel plate cladding semi-steel plate concrete structure module, a barrel steel plate concrete structure module and a top floor slab semi-steel plate concrete structure module required by the construction of the passive water tank according to the construction requirement, and transporting to a containment shell construction site; sequentially and respectively hoisting, positioning, butting and welding a support steel structure module, a bottom floor slab semi-steel plate concrete structure module, a stainless steel cladding semi-steel plate concrete structure module and a barrel steel plate concrete structure module, and pouring concrete in due time; after introducing heat exchanger equipment, hoisting the semi-steel plate concrete structure modules of the top floor slab in sequence, and pouring concrete on the upper parts of the semi-steel plate concrete structure modules; laying and welding a stainless steel covering surface at the bottom of the passive water tank; and handing over the passive water tank and the heat exchanger.
Description
Technical Field
The invention belongs to the technical field of nuclear power, and particularly relates to a construction method of a passive water tank of a nuclear power plant.
Background
With the continuous development of nuclear power technology, the adoption of passive technology to improve the safety of a nuclear power plant has become one of the remarkable characteristics of the third-generation nuclear power technology. The passive water tank is used as a facility for dealing with the complete loss of water supply of a secondary loop of a nuclear power plant, is an important measure for improving the safety of the nuclear power plant, is arranged at the lower part of a dome of a reactor factory building and outside a shell and is an annular hollow cantilever structure, and an inner cavity (except the top) of the passive water tank is designed into a stainless steel cladding structure.
In the traditional construction method of the passive water tank of the nuclear power plant, when the shell of the reactor plant is constructed to the bottom position of the passive water tank, the construction is carried out according to the following sequence after the surrounding plants are required to finish the roof panel construction: 1) erecting a full scaffold to the bottom of the passive water tank, building a water tank bottom plate supporting template, binding reinforcing steel bars and pouring concrete; 2) building a scaffold for water tank outer cylinder construction, binding steel bars, arranging a template for cylinder concrete pouring, pouring concrete and removing a template; 3) erecting a full scaffold inside the water tank to the top of the passive water tank, building a water tank floor supporting template, binding reinforcing steel bars, pouring concrete (reserving a secondary pouring area of a cavity into which equipment such as a heat exchanger and the like is introduced), and dismantling the template and the scaffold; 4) carrying out post-pasting construction of a stainless steel lining inside the water tank; 5) heat exchangers, pipelines and the like are led in place and are installed; 6) and dismantling the peripheral construction scaffold and the template.
Because the passive water tank belongs to the overhanging structure and has large construction load, the construction of the passive water tank not only has large construction and dismantling engineering quantity, high cost and large high-altitude construction quantity of a construction support system, but also has the problems of high difficulty and long construction period when the stainless steel cladding of the water tank is constructed by adopting the traditional post-bonding method.
In view of the defects of high operation difficulty, high construction risk, low working efficiency and the like of the traditional construction method of the passive water tank of the nuclear power plant, an efficient and convenient construction method of the passive water tank of the nuclear power plant is necessary to be provided.
Disclosure of Invention
The invention aims to: the defects of the prior art are overcome, and the efficient and convenient construction method of the passive water tank of the nuclear power plant is provided.
In order to achieve the purpose, the invention provides a construction method of a nuclear power plant passive water tank, which comprises the following steps:
s1: prefabricating a supporting steel structure module, a bottom floor slab semi-steel plate concrete structure module, a stainless steel plate cladding semi-steel plate concrete structure module, a barrel steel plate concrete structure module and a top floor slab semi-steel plate concrete structure module required by the construction of the passive water tank according to the construction requirement, and transporting to a containment shell construction site;
s2: sequentially hoisting the supporting steel structure module components, positioning and fixing the supporting steel structure module, and pouring concrete of the containment shell to the elevation of the top of the supporting steel structure module to form a supporting structure body of the passive water tank;
s3: sequentially hoisting the bottom floor slab semi-steel plate concrete structure module, positioning and welding the bottom floor slab semi-steel plate concrete structure module with the supporting steel structure module, splicing bottom floor slab semi-steel plate concrete structure module components to form a passive water tank bottom plate structure body, and pouring concrete on the upper part of the semi-steel plate concrete structure module;
s4: sequentially hoisting the stainless steel cladding semi-steel plate concrete structure module, positioning, butting with the bottom floor semi-steel plate concrete structure module, fixing and welding to form an outer side surface structural body of the containment shell wall, building an inner side surface concrete pouring template of the containment shell wall, and pouring concrete of the part of the wall of the containment shell;
s5: sequentially hoisting the cylinder steel plate concrete structure modules, positioning the first layer of modules at the bottom floor slab semi-steel plate concrete structure module component and fixing the modules, positioning, butting, fixing and welding the second layer of modules and the third layer of modules to form a passive water tank outer side wall structure body, and pouring concrete in the cylinder steel plate concrete structure modules;
s6: introducing heat exchanger equipment in an open top mode, and positioning, fixing and installing items such as pipelines connected with the heat exchanger equipment;
s7: hoisting the top floor slab semi-steel plate concrete structure module in sequence, positioning and welding the top floor slab semi-steel plate concrete structure module and the lower barrel steel plate concrete structure module and the stainless steel cladding semi-steel plate concrete structure module, splicing the top floor slab semi-steel plate concrete structure module components to form a passive water tank roof structure body, and pouring concrete on the upper part of the semi-steel plate concrete structure module;
s8: laying and welding a stainless steel covering surface at the bottom of the passive water tank; and
s9: and the transfer of internal installation items such as passive water tanks and heat exchangers.
As an improvement of the construction method of the passive water tank in the nuclear power plant, in step S1, the supporting steel structure module includes a supporting steel structure and an anchor bolt for anchoring.
As an improvement of the construction method of the passive water tank in the nuclear power plant, in step S1, the bottom floor slab semi-steel plate concrete structural module is a sector structure including steel plates, anchor bolts and reinforcing ribs.
As an improvement of the construction method of the passive water tank in the nuclear power plant, in step S1, the stainless steel plate clad semi-steel plate concrete structural module is an arc-shaped structure including a steel plate, an anchor bolt and a reinforcing rib.
As an improvement of the construction method of the passive water tank in the nuclear power plant, in the step S1, the cylinder steel plate concrete structure module is an arc-surface wall structure including a carbon steel plate, a duplex stainless steel plate, tie bars and studs.
As an improvement of the construction method of the passive water tank in the nuclear power plant, in step S1, the top floor slab semi-steel plate concrete structural module is a sector structure including steel plates, anchor bolts and reinforcing ribs.
As an improvement of the construction method of the nuclear power plant passive water tank, the bottom floor slab semi-steel plate concrete structure module and the top floor slab semi-steel plate concrete structure module are hoisted by adopting a plane frame structure hoist, and the plane frame structure hoist is connected with a construction hoisting tower or a crawler-type large crane to complete hoisting of the modules.
As an improvement of the construction method of the nuclear power plant passive water tank, the supporting steel structure module, the stainless steel plate cladding semi-steel plate concrete structure module and the barrel steel plate concrete structure module are hoisted by using a balance beam hanger, and the balance beam hanger is connected with a construction hoisting tower or a crawler-type large crane to complete the hoisting of the modules.
In step S6, a construction tower crane or a crawler-type crane is used to directly introduce and position equipment such as a heat exchanger from the top of the pool before the construction of the floor at the top of the pool, and then the construction of items such as pipelines is performed after the construction of the floor at the upper part.
As an improvement of the construction method of the passive water tank in the nuclear power plant, in step S8, the stainless steel plate cover and the duplex stainless steel on the inner side wall of the water tank are welded, and the weld joint is subjected to leakage-free detection.
Compared with the prior art, the construction method of the passive water tank of the nuclear power plant changes the conventional construction scaffold and water tank construction supporting system built on the construction site, and then implements high-altitude large-volume reinforced concrete structure and stainless steel cladding construction into a module component design scheme and modular construction, and sequentially lifts the components into place, splices, fixes, welds and pours concrete through a crane, so that the factory prefabrication of the passive water tank module component and the rapid pouring after the field module component is integrally introduced and positioned are realized.
1) The passive water tank structure is designed into a module, and the module is prefabricated in a factory in advance, so that the workload of field construction operation is greatly reduced, the construction period of the passive water tank occupying a construction critical path is effectively shortened, and the contribution to shortening the whole construction period of a project is obvious;
2) the passive water tank module, particularly the steel plate on the upstream surface, is made of a duplex stainless steel material, and the traditional post-attaching method of the stainless steel covering surface of the water tank is optimized into a modular construction method, so that the construction difficulty and the construction risk of the stainless steel covering surface of the water tank are greatly reduced, and the construction quality is improved;
3) according to the water tank cylinder steel plate concrete structure module of the passive water tank module, different steel plates adopt a module design scheme of two materials, namely carbon steel and duplex stainless steel plates, according to functional requirements, so that the functional requirements are met, and meanwhile, the construction cost can be reduced;
4) the adoption of the passive water tank supporting steel structure module cancels a whole body construction supporting system and a scaffold in the traditional construction mode, solves the construction problem of the water tank of the cantilever structure, only has the workload of butt welding and concrete pouring among components after the module is introduced and positioned, reduces the on-site work peak and reduces the construction risk;
5) the passive water tank module adopts a standardized design, the prefabrication efficiency of module components can be greatly improved, a large amount of field construction workload is transferred to a factory for carrying out, the construction environment is greatly improved relative to the field, and favorable conditions are created for improving the construction quality.
Drawings
The following detailed description of the construction method of the passive water tank of the nuclear power plant according to the present invention is provided with reference to the accompanying drawings and the specific embodiments, wherein:
FIG. 1 is a schematic cross-sectional view of a nuclear power plant building corresponding to the construction method of the passive water tank of the nuclear power plant.
Fig. 2A and 2B are a front view and a top view of 1/2 division of passive water tank modules in the construction method of the passive water tank of the nuclear power plant.
Fig. 3A and 3B are a front view and a top view of a support steel structure module in the construction method of the passive water tank for a nuclear power plant according to the present invention, respectively.
Fig. 4A and 4B are a front view and a top view, respectively, of a bottom semi-steel plate concrete structural module in the construction method of the passive water tank for a nuclear power plant according to the present invention.
Fig. 5A and 5B are a front view and a top view, respectively, of a stainless steel clad semi-steel plate concrete structural module in the construction method of the passive water tank for a nuclear power plant according to the present invention.
Fig. 6A and 6B are a front view and a top view, respectively, of a drum steel plate concrete structural module in the construction method of the passive water tank for a nuclear power plant according to the present invention.
Fig. 7A and 7B are a front view and a top view, respectively, of a top semi-steel plate concrete structural module in the construction method of the passive water tank for a nuclear power plant according to the present invention.
Fig. 8A and 8B are schematic structural diagrams of a module spreader in the method for constructing the passive water tank of the nuclear power plant according to the present invention.
Fig. 9 to 15 are schematic views of a construction method of the passive water tank for a nuclear power plant according to the construction method of the passive water tank for a nuclear power plant of the present invention, and show the configurations of the passive water tank at different stages.
Detailed Description
In order to make the objects, technical solutions and technical effects of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 15, the construction method of the passive water tank of the nuclear power plant of the present invention includes the following steps:
s1: prefabricating a supporting steel structure module 10, a bottom floor slab semi-steel plate concrete structure module 20, a stainless steel plate cladding semi-steel plate concrete structure module 30, a barrel steel plate concrete structure module 40 and a top floor slab semi-steel plate concrete structure module 50 required by the construction of the passive water tank according to the construction requirement, and transporting to a containment shell construction site;
referring to fig. 1 to 8, specifically, in step S1, the passive water tank is divided into five types of modules, that is, the passive water tank module components are divided into a support steel structure module 10, a bottom floor slab semi-steel plate concrete structure module 20, a stainless steel plate cladding semi-steel plate concrete structure module 30, a barrel steel plate concrete structure module 40, and a top floor slab semi-steel plate concrete structure module 50, and the modules are determined by specific number according to design, and adjacent modules are butted and welded to form a corresponding structure of the passive water tank.
For example, according to an embodiment of the present invention, referring to fig. 3A and 3B, 46 modules are uniformly arranged on the supporting steel structure module 10 to form a construction load during construction of the passive water tank and a bearing load during operation, the supporting steel structure module 10 includes two parts, namely a supporting steel structure 100 and an anchor bolt 102 for anchoring, the specific structure and the anchor bolt are determined by calculation and design according to comprehensive consideration of bearing water tank load, seismic load, wind load, construction load and the like, the supporting steel structure module 10 is designed according to a standard and uniformly arranged, and the specific number of modules can be determined according to actual engineering and comprehensive consideration.
Referring to fig. 4A and 4B, the bottom floor half-steel plate concrete structure modules 20 are provided with 12 modules, which are uniformly distributed, adjacent modules are spliced and welded to form a bottom floor structure, the bottom half-steel plate concrete structure modules 20 are sector-shaped structures including steel plates 200, anchor bolts 202 and reinforcing ribs 204, the bottom half-steel plate concrete structure modules 20 are designed according to a standard, and the number of the specific modules can be determined according to actual and comprehensive engineering considerations.
Referring to fig. 5A and 5B, 12 modules are provided in total for the stainless steel plate clad semi-steel plate concrete structural module 30, adjacent modules are butted and welded to form a single-sided stainless steel clad, the stainless steel clad semi-steel plate concrete structural module 30 is an arc-surface structure including a steel plate 300, an anchor bolt 302 and a reinforcing rib 304, the stainless steel clad semi-steel plate concrete structural module 30 is designed according to a standard, and the number of specific modules can be determined according to actual engineering and comprehensive consideration.
Referring to fig. 6A and 6B, the cylinder steel plate concrete structure module 40 is designed into 36 modules with 12 per layer in three layers, the modules are sequentially hung in place, butted and welded to form a wall body outside the water tank, the cylinder steel plate concrete structure module 40 is an arc-shaped wall body structure comprising a carbon steel plate 400, a duplex stainless steel plate 402, a counter-pull steel bar 404 and a stud 406, the cylinder steel plate concrete structure module 40 is designed according to a standard, and the specific number of the modules can be determined according to actual engineering and comprehensive consideration.
Referring to fig. 7A and 7B, the top floor half-steel plate concrete structure modules 50 are provided with 12 modules, the adjacent modules are spliced and welded to form a water tank top floor structure, the top half-steel plate concrete structure modules 50 are sector-shaped structures including steel plates 500, anchor bolts 502 and reinforcing ribs 504, the top half-steel plate concrete structure modules 50 are designed according to standards, and the number of the specific modules can be determined according to actual and comprehensive engineering considerations.
S2: constructing the containment shell to the arrangement position of a support steel structure module of the passive water tank, positioning and fixing the support steel structure module, and pouring concrete of the containment shell to the top elevation of the support steel structure module;
referring to fig. 9, specifically: the containment shell is constructed to the arrangement position of a passive water tank supporting steel structure module 10, the module is sequentially hoisted into a positioning and fixing position through a hoisting device 60 by adopting a construction hoisting tower or a crawler-type large crane, and an anchor bolt is anchored into the containment shell.
S3: hoisting the bottom floor slab semi-steel plate concrete structure module 20 in sequence, positioning and welding, and pouring the shell cylinder for supporting the anchoring part of the steel structure module 10 and the concrete on the upper part of the semi-steel plate concrete structure module;
referring to fig. 10, specifically: sequentially hoisting the bottom floor slab semi-steel plate concrete structure module 20 by using a construction tower crane or a crawler-type large crane through a hoisting tool 60, positioning and welding the bottom floor slab semi-steel plate concrete structure module with the support steel structure module, splicing bottom floor slab semi-steel plate concrete structure module components to form a passive water tank bottom plate structure body, and pouring concrete on the upper part of the semi-steel plate concrete structure module;
s4: hoisting the stainless steel clad semi-steel plate concrete structure modules 30 in sequence, positioning, butting, fixing and welding, and pouring shell cylinder concrete;
referring to fig. 11, specifically: sequentially hoisting a stainless steel cladding semi-steel plate concrete structure module 30 by a construction tower crane or a crawler-type large crane through a hoisting tool 60, positioning the stainless steel cladding semi-steel plate concrete structure module 20 on a bottom floor, butting adjacent module components, fixing and welding to form a water tank single-side stainless steel cladding, then building an inner side concrete pouring template of a containment shell wall body, and pouring concrete of the part of the wall body of the containment shell;
s5: hoisting the cylinder steel plate concrete structure module 40 in sequence, positioning, butting, fixing, welding and pouring concrete;
referring to fig. 12, specifically: the sub-module that adopts construction tower crane or crawler-type big loop wheel machine to hoist water tank barrel first layer steel sheet concrete structure module in proper order through hoist 60 is fixed in bottom floor half steel sheet concrete structure module 20, and adjacent module butt joint, welding let back hoist and mount second floor, wait three-layer sub-module butt joint, welding, accomplish the module location of water tank outer wall structure, the welding forms the passive water tank outside wall structure body to concrete in the barrel steel sheet concrete structure module is pour.
S6: an open top lead-in heat exchanger device;
referring to fig. 13, specifically: the method adopts an open-top construction method, namely, equipment such as a heat exchanger and the like is directly led in and put in place from the top of the water pool before the construction of the floor slab at the top of the water pool by adopting a construction tower crane or a crawler-type large crane, and then the construction of pipelines, cables and the like is carried out after the construction of the floor slab at the upper part.
S7: hoisting the semi-steel plate concrete structure module 50 of the top floor slab in sequence, positioning, welding and pouring upper concrete;
referring to fig. 14, specifically: sequentially hoisting a water tank top floor slab semi-steel plate concrete structure module 50 by adopting a construction tower crane or a crawler-type large crane, positioning and welding 30 the water tank top slab semi-steel plate concrete structure module 50 with a lower barrel steel plate concrete structure module 40 and a stainless steel cladding semi-steel plate concrete structure module, splicing the top floor slab semi-steel plate concrete structure module to form a passive water tank top plate structure body, and pouring concrete on the upper part of the semi-steel plate concrete structure module;
s8: laying and welding a stainless steel clad surface at the bottom of the passive water tank;
referring to fig. 14, specifically: and (3) performing secondary concrete pouring and leveling on the bottom floor slab semi-steel plate concrete structure module 20, then paving a stainless steel plate covering surface, welding the stainless steel plate covering surface and the duplex stainless steel on the inner side wall of the water tank, and performing non-leakage detection on a welding line to ensure the anti-leakage function of the water tank.
S9: the transfer of internal installation items such as a passive water tank, a heat exchanger and the like is carried out, and finished product protection is carried out.
Referring to fig. 15, specifically: and constructing a cofferdam at the top of the water tank, completing the construction of the structure body, transferring internal installation items such as the water tank, the heat exchanger and the like, and turning to the protection of finished products.
Referring to fig. 8A and 8B, according to an embodiment of the present invention, two types of hangers are used for the modules, the bottom floor slab semi-steel plate concrete structure module 20 and the top floor slab semi-steel plate concrete structure module 50 are planar frame structure hangers, the support steel structure module 10, the stainless steel plate cladding semi-steel plate concrete structure module 30 and the barrel steel plate concrete structure module 40 are balance beam hangers, each hanger includes a steel wire rope 600, a balance beam 602, a planar frame 606 and a hanging point 604, the structural dimensions and the hanging point positions of the balance beam and the planar frame are designed according to the components of the hanging module, and the steel wire rope 600 is connected with a crane and lifts the modules, so that the hangers can be shared.
In combination with the above detailed description of the embodiment of the invention, it can be seen that, compared with the prior art, the construction method of the passive water tank of the nuclear power plant changes the existing construction method of building a construction scaffold and a water tank construction support system on a construction site, then implementing high-altitude massive reinforced concrete structure and stainless steel cladding construction into a module component design scheme and modular construction, and sequentially hoisting the components into place, splicing, fixing, welding and pouring concrete by a crane, so that the factory prefabrication of the passive water tank module component and the rapid pouring after the integral introduction and positioning of the field module are realized.
1) The passive water tank structure is designed into a module, and the module is prefabricated in a factory in advance, so that the workload of field construction operation is greatly reduced, the construction period of the passive water tank occupying a construction critical path is effectively shortened, and the contribution to shortening the whole construction period of a project is obvious;
2) the passive water tank module, particularly the steel plate on the upstream surface, is made of a duplex stainless steel material, and the traditional post-attaching method of the stainless steel covering surface of the water tank is optimized into a modular construction method, so that the construction difficulty and the construction risk of the stainless steel covering surface of the water tank are greatly reduced, and the construction quality is improved;
3) according to the water tank cylinder steel plate concrete structure module of the passive water tank module, different steel plates adopt a module design scheme of two materials, namely carbon steel and duplex stainless steel plates, according to functional requirements, so that the functional requirements are met, and meanwhile, the construction cost can be reduced;
4) the adoption of the passive water tank supporting steel structure module cancels a whole body construction supporting system and a scaffold in the traditional construction mode, solves the construction problem of the water tank of the cantilever structure, only has the workload of butt welding and concrete pouring among components after the module is introduced and positioned, reduces the on-site work peak and reduces the construction risk;
5) the passive water tank module adopts a standardized design, the prefabrication efficiency of module components can be greatly improved, a large amount of field construction workload is transferred to a factory for carrying out, the construction environment is greatly improved relative to the field, and favorable conditions are created for improving the construction quality.
Appropriate changes and modifications to the embodiments described above will become apparent to those skilled in the art from the disclosure and teachings of the foregoing description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. A construction method of a nuclear power plant passive water tank is characterized by comprising the following steps:
s1: prefabricating a supporting steel structure module, a bottom floor slab semi-steel plate concrete structure module, a stainless steel plate cladding semi-steel plate concrete structure module, a barrel steel plate concrete structure module and a top floor slab semi-steel plate concrete structure module which are required by the construction of the passive water tank and are respectively formed by module butt joint according to the construction requirement, and transporting the modules to a containment shell construction site;
s2: sequentially hoisting the supporting steel structure module components, positioning and fixing the supporting steel structure module, and pouring concrete of the containment shell to the elevation of the top of the supporting steel structure module to form a supporting structure body of the passive water tank;
s3: sequentially hoisting the bottom floor slab semi-steel plate concrete structure module, positioning and welding the bottom floor slab semi-steel plate concrete structure module with the supporting steel structure module, splicing bottom floor slab semi-steel plate concrete structure module components to form a passive water tank bottom plate structure body, and pouring concrete on the upper part of the semi-steel plate concrete structure module;
s4: sequentially hoisting the stainless steel cladding semi-steel plate concrete structure module, positioning, butting with the bottom floor semi-steel plate concrete structure module, fixing and welding to form an outer side surface structural body of the containment shell wall, building an inner side surface concrete pouring template of the containment shell wall, and pouring concrete of the part of the wall of the containment shell;
s5: sequentially hoisting the cylinder steel plate concrete structure modules, positioning the first layer of modules at the bottom floor slab semi-steel plate concrete structure module component and fixing the modules, positioning, butting, fixing and welding the second layer of modules and the third layer of modules to form a passive water tank outer side wall structure body, and pouring concrete in the cylinder steel plate concrete structure modules;
s6: introducing heat exchanger equipment in an open top mode, and positioning, fixing and installing items such as pipelines connected with the heat exchanger equipment;
s7: hoisting the top floor slab semi-steel plate concrete structure module in sequence, positioning and welding the top floor slab semi-steel plate concrete structure module and the lower barrel steel plate concrete structure module and the stainless steel cladding semi-steel plate concrete structure module, splicing the top floor slab semi-steel plate concrete structure module components to form a passive water tank roof structure body, and pouring concrete on the upper part of the semi-steel plate concrete structure module;
s8: laying and welding a stainless steel covering surface at the bottom of the passive water tank; and
s9: and the transfer of internal installation items such as passive water tanks and heat exchangers.
2. The method for constructing the passive water tank of the nuclear power plant according to claim 1, wherein in the step S1, the supporting steel structure module comprises a supporting steel structure and an anchor bolt for anchoring.
3. The method for constructing the nuclear power plant passive water tank according to claim 1, wherein in the step S1, the bottom floor slab semi-steel plate concrete structural module is a sector-shaped structure comprising steel plates, anchor bolts and reinforcing ribs.
4. The method for constructing the passive water tank of the nuclear power plant according to claim 1, wherein in the step S1, the stainless steel plate clad semi-steel plate concrete structural module is an arc surface type structure comprising steel plates, anchor bolts and reinforcing ribs.
5. The method for constructing the passive water tank of the nuclear power plant according to claim 1, wherein in the step S1, the barrel steel plate concrete structural module is a cambered wall structure including a carbon steel plate, a duplex stainless steel plate, tie bars and studs.
6. The method for constructing the nuclear power plant passive water tank according to claim 1, wherein in the step S1, the half steel plate concrete structural module of the top floor is a sector-shaped structure including steel plates, anchor bolts and reinforcing ribs.
7. The construction method of the nuclear power plant passive water tank as claimed in claim 1, wherein the bottom floor slab semi-steel plate concrete structure module and the top floor slab semi-steel plate concrete structure module are hoisted by adopting a plane frame structure hoist, and the plane frame structure hoist completes hoisting of the modules by being connected with a construction crane tower or a crawler-type large crane.
8. The construction method of the nuclear power plant passive water tank as claimed in claim 1, wherein the supporting steel structure module, the stainless steel plate clad semi-steel plate concrete structure module and the barrel steel plate concrete structure module are hoisted by using a balance beam hoist, and the balance beam hoist completes hoisting of the modules by being connected with a construction tower crane or a crawler-type large crane.
9. The construction method of the nuclear power plant passive water tank according to claim 1, wherein in the step S6, equipment such as a heat exchanger is directly introduced from the top of the water tank and put in place before the construction of the floor at the top of the water tank by using a construction tower crane or a crawler crane, and then pipeline and cable construction is performed after the construction of the upper floor.
10. The method for constructing the passive water tank for nuclear power plant according to claim 1, wherein in the step S8, the stainless steel plate cover is welded with the duplex stainless steel of the inner side wall of the water tank, and the welding seam is detected without leakage.
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| CN113089777A (en) * | 2021-03-26 | 2021-07-09 | 中广核工程有限公司 | Modular annular concrete stainless steel water tank and construction method thereof |
| CN113089777B (en) * | 2021-03-26 | 2022-07-12 | 中广核工程有限公司 | Modular annular concrete stainless steel water tank and construction method thereof |
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| CN111075235B (en) | 2021-03-12 |
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