CN111561194B - Reactor single-side steel plate ultra-high performance concrete single-layer containment vessel and construction method thereof - Google Patents
Reactor single-side steel plate ultra-high performance concrete single-layer containment vessel and construction method thereof Download PDFInfo
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- CN111561194B CN111561194B CN202010273143.5A CN202010273143A CN111561194B CN 111561194 B CN111561194 B CN 111561194B CN 202010273143 A CN202010273143 A CN 202010273143A CN 111561194 B CN111561194 B CN 111561194B
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- E04B7/00—Roofs; Roof construction with regard to insulation
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- E04B7/10—Shell structures, e.g. of hyperbolic-parabolic shape; Grid-like formations acting as shell structures; Folded structures
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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
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/08—Vessels characterised by the material; Selection of materials for pressure vessels
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- G21C—NUCLEAR REACTORS
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- G21C13/0933—Concrete vessels made of prestressed concrete
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C13/00—Pressure vessels; Containment vessels; Containment in general
- G21C13/10—Means for preventing contamination in the event of leakage, e.g. double wall
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Abstract
The invention provides a single-side steel plate ultra-high performance concrete single-layer containment vessel, and belongs to the technical field of nuclear power engineering structures. The safe shell structure comprises a shell and a dome, wherein the shell and the dome are of a single-inner-side steel plate ultrahigh-performance concrete structure, a plurality of obliquely or orthogonally arranged T-shaped stiffening ribs, studs and shear-resistant ribs are uniformly fixed on the outer surface of a steel plate through welding, a web plate of each T-shaped stiffening rib can be solid or hollow, and the shear-resistant ribs are fixed through the intersection points of straight thread anchoring plates arranged at the top of the shear-resistant ribs and two-way steel bars of a steel bar net outside a wall body of the safe shell. The dome is designed by considering the permanent joint of the reserved holes, and the cover plate and the hole are connected and detached through the annular flange and the high-strength bolt. The containment adopts a modular design construction method, and the single-side steel plate and the T-shaped stiffening ribs can replace part of ultrahigh-performance concrete pouring templates. The invention can ensure the pressure-bearing and sealing requirements in the containment, prevent external events and large airplanes from impacting and has obvious engineering economy.
Description
Technical Field
The invention relates to a reactor single-side steel plate ultra-high performance concrete single-layer containment vessel and a construction method thereof, and belongs to the technical field of nuclear power structural engineering.
Background
The containment vessel is an extremely important structure in a nuclear power plant, and a reactor, a pressure vessel, an evaporator and a safety-level pipeline are all arranged in the containment vessel, and belong to the third safety barrier of the nuclear power plant. The containment is a nuclear safety related structure, belongs to an anti-seismic I-type component, and is required to consider the temperature rise and the pressure bearing and the sealing performance under the internal pressure under the working condition of a primary circuit accident in the containment and resist the impact of a large commercial aircraft and other external events.
The common containment vessel of the nuclear power plant is of a double-layer shell structure, and the inner shell adopts a pure steel shell or a prestressed concrete shell to ensure the bearing of internal pressure and tightness and avoid radioactive leakage; the shell usually adopts a reinforced concrete shell with a thicker section to resist the impact action of a large airplane, and a certain distance is reserved between the double-layer containment shells to ensure that the internal safety level equipment and system cannot be influenced when the shell is damaged and deformed due to the collision of the airplane. However, the double-shell construction cost is high, the process is complex, the construction process is slow, and the construction period and the engineering economy are greatly affected. Therefore, a single-layer containment structure with high performance is needed to solve the above problems, and the safety function cannot be reduced, i.e. not only ensuring the sealing under internal pressure in an accident, but also ensuring that the concrete does not crack under normal working pressure, and simultaneously ensuring that the internal nuclear-grade pipeline and equipment are not affected when an airplane collides.
The ultra-high performance concrete (namely UHPC) has the advantages of ultra-high compressive strength, tensile strength, toughness, reliability, durability and the like, and the ultra-high performance concrete is adopted as a common concrete substitute in a nuclear power containment structure with extremely high importance and forms a whole with a single-side steel plate, namely the single-side steel plate ultra-high performance concrete structure (namely HSUHPC), so that the reliability, durability, pressure-bearing sealing property, shock resistance and shock resistance of the containment structure can be greatly improved.
Meanwhile, as a large number of nuclear power equipment are needed, the arrival time is often inconsistent, and the equipment installation has high requirements on the internal environment during construction, the temporary sealing property of the containment vessel and the requirements on a clean area in the shell are met, and the subsequent large equipment also has the problems of maintenance and replacement in the service life. Therefore, there is also a need to provide a permanent bond opening design for the containment dome.
Disclosure of Invention
The invention aims to provide an ultra-high performance concrete single-layer containment vessel with a steel plate on one side of a reactor and a construction method thereof, which are used for overcoming the defects of the prior art, ensuring that the safety function of the containment vessel cannot be reduced, namely ensuring sealing under the pressure in an accident, ensuring that concrete does not crack under the normal working pressure, and simultaneously ensuring that an aircraft does not influence internal nuclear-grade pipelines and equipment when impacting.
The single-side steel plate ultrahigh-performance concrete single-layer containment vessel provided by the invention consists of a lower barrel part and an upper dome part, wherein the barrel and the dome are of single-side steel plate ultrahigh-performance concrete structures; the steel plate is arranged at the inner side of the containment, the T-shaped stiffening ribs, the studs and the shear ribs which are arranged in an oblique or orthogonal grid shape are uniformly distributed on the steel plate, a web plate of the T-shaped stiffening ribs can adopt a solid web or an empty web, and the T-shaped stiffening ribs, the studs and the shear ribs are respectively welded and fixed with the steel plate; the shear resistant ribs are fixed through the intersection points of the straight thread anchoring plates arranged at the tops of the shear resistant ribs and the bidirectional steel bars of the steel bar mesh outside the containment wall; the dome is provided with a preformed hole, and the unilateral steel plate is arranged on the foundation fixed by the ultra-high performance concrete single-layer containment.
In the single-side steel plate ultra-high performance concrete single-layer containment vessel, a tool for reserving a hole consists of a reinforcing ring, a cover plate, a high-strength bolt, an annular flange, a reinforcing rib plate, a flexible sealing material and a detachable inhaul cable; the reinforcing ring is fixed relative to the dome and protrudes out of the top surface of the dome; the outer surface of apron and the internal surface of beaded finish have processed upper and lower step respectively, through the upper and lower step of apron surface and beaded finish internal surface, the apron is fixed in the beaded finish, the top of beaded finish and apron is arranged in to the annular flange to guarantee the relatively fixed of beaded finish and apron through high strength bolt, be equipped with flexible sealing material between the contact surface of beaded finish and apron, be equipped with the floor of stiffening between beaded finish and the dome, be equipped with the cable of dismantling between apron and the dome.
The invention provides a construction method of a single-side steel plate ultra-high performance concrete single-layer containment vessel, which comprises the following steps:
(1) calculating the section form of the single-side steel plate ultrahigh-performance concrete structure according to various preset load working conditions and combinations, including accident temperature rise and internal pressure in a containment, earthquake load, construction load, constant activity action, large airplane impact action and the like, wherein the section form includes section size, steel plate thickness, specification and spacing of T-shaped stiffening ribs arranged in an oblique or orthogonal grid;
(2) determining the structural form of the annular reinforcing structure at the periphery of the opening of the dome and the connection design between the annular reinforcing structure and the cover plate through calculation, wherein the structural form comprises the stiffening rib plate spacing of the annular reinforcing structure and the type selection and arrangement of high-strength friction bolts;
(3) processing a containment steel plate and T-shaped stiffening ribs, studs and shear ribs which are connected with the containment steel plate into a whole, and forming segmented steel plate modules by considering the feasibility of construction;
(4) after the steel plate module in the step (3) is hoisted in place, binding a reinforcing mesh on the other side of the containment without the steel plate, fixing the shear ribs through the straight thread anchoring plates on the top and the two-way reinforcing steel bar intersection points of the reinforcing mesh, and erecting an ultrahigh-performance concrete pouring template on the outer side;
(5) pouring ultrahigh-performance concrete between the single-side steel plate and the erected template, and pouring the ultrahigh-performance concrete layer by layer and upwards to a dome section in a segmented manner;
(6) a single-side steel plate and a T-shaped stiffening rib at the bottom of the dome section form a template, a reinforcing mesh is bound after the template is installed in place, and shear ribs are fixed through the intersection points of the straight thread anchoring plate at the top and the two-way reinforcing steel bars of the reinforcing mesh;
(7) pouring ultra-high performance concrete on a steel plate at the bottom of the dome to finally form a single-side steel plate ultra-high performance concrete single-layer containment structure with a hoisting hole reserved at the dome;
(8) the cover plate is hoisted to the top of the dome, positioning, installation, sealing and fastening are carried out, and the detachable inhaul cable is additionally arranged between the bottom of the dome and the bottom of the cover plate to carry out secondary connection.
The invention provides a single-side steel plate ultra-high performance concrete single-layer containment vessel and a construction method thereof, which are characterized by comprising the following steps:
according to the single-side steel plate ultra-high performance concrete single-layer containment vessel, the steel plate is adopted on the inner side of the containment vessel, so that the pressure bearing and sealing requirements under the pressure in an accident can be met, and the effects of shielding and preventing radioactive leakage are effectively achieved; the ultra-high performance concrete with a certain thickness outside the steel plate can improve the section rigidity, the overall stability, the structural reliability and the durability, and the ultra-high performance concrete has ultra-high tensile and compression resistance and can avoid cracking under the action of internal pressure. The studs welded on the surfaces of the steel plates can prevent the steel plates from being out-of-plane unstable under pressure, the upper ends of the shear resistant ribs are connected with the reinforcing mesh outside the containment vessel, so that the containment vessel forms a whole, the large airplane impact resistance of the single-side steel plate ultrahigh-performance concrete can be effectively improved, and meanwhile, the steel plates inside the containment vessel can avoid the damage of broken nails on the back of the concrete to the internal nuclear-grade pipeline when the airplane impacts; the T-shaped stiffening ribs connected to the surface of the steel plate can greatly improve the stability of the steel plate template during transportation; meanwhile, the grid framework formed by the T-shaped stiffening ribs can greatly improve the shearing resistance of the structure, the oblique grid can further improve the mechanical property of the structure, materials are saved, and the cross section size can be reduced and the self weight of the structure can be lightened under the condition that the span of the dome is increased. According to the single-side steel plate ultra-high performance concrete single-layer containment vessel, due to the fact that the preformed hole and the cover plate structure which are arranged on the dome and are combined forever, overhaul and replacement of large equipment in the containment vessel in the life period of a nuclear power station can be met, the connection strength between the cover plate and the opening can be guaranteed through connection of the high-strength bolt and the annular flange plate, and the sealing performance and external waterproofness of the connection position can be guaranteed through the addition of the flexible sealing material to the hole between the cover plate and the wall of the dome. Through the design of the reserved hole and the cover plate which are combined forever, the engineering investment and the construction difficulty of carrying out dome hole opening after replacing large equipment in the service life can be effectively avoided. The steel plate with the ribs on the shell part of the containment can form partial templates during construction, formwork support during concrete construction is reduced, the steel plate with the ribs on the top dome can be directly used as a bottom formwork for concrete pouring, engineering construction can be accelerated, and the construction period is shortened.
In conclusion, the single-side steel plate ultra-high performance concrete single-layer containment vessel provided by the invention has the advantages that due to the unique single-layer structure, the mechanical properties of steel and ultra-high performance concrete are effectively utilized, the tensile strength of the steel and the tensile and compressive strength of the ultra-high performance concrete are fully exerted, the safety function of the double-layer containment vessel in the prior art is maintained, the single-side steel plate ultra-high performance concrete single-layer containment vessel is suitable for higher pressure bearing requirement and larger dome span in the containment vessel, and the engineering cost can be greatly reduced.
Drawings
Fig. 1 is a schematic diagram of the general structure of a single-sided steel plate ultra-high performance concrete single-layer containment vessel provided by the invention.
FIG. 2 is a top view of the internal steel structure consisting of steel plates and T-shaped stiffeners in the containment vessel of the present invention.
FIG. 3 is a partial enlarged view of T-shaped stiffeners, studs, and shear ribs on the single-sided steel plate in FIG. 1.
Fig. 4 is a partially enlarged view of a cross section of the cover plate and dome in the prepared hole 14 of fig. 1.
FIG. 5 is a top view of a connection portion of a cover plate and a dome of the single-sided steel plate ultra-high performance concrete single-layer containment vessel shown in FIG. 1.
FIG. 6 is a construction flow chart of the single-sided steel plate ultra-high performance concrete single-layer containment vessel of the present invention.
In fig. 1-6, 1 is a steel plate, 2 is a T-shaped stiffening rib, 3 is a stud, 4 is a shear rib, 5 is ultra-high performance concrete, 6 is a straight thread anchor plate, 7 is a reinforcing ring, 8 is a cover plate, 9 is a high-strength bolt, 10 is a ring-shaped flange, 11 is a stiffening rib plate, 12 is a flexible sealing material, 13 is a detachable inhaul cable, 14 is a reserved hole, 15 is a reinforcing mesh, a is a shell of a single-side steel plate ultra-high performance concrete single-layer containment, and B is a foundation.
Detailed Description
The single-side steel plate ultra-high performance concrete single-layer containment vessel is structurally shown in fig. 1 and fig. 2, the single-side steel plate ultra-high performance concrete single-layer containment vessel is composed of a cylindrical barrel body part at the lower part and a dome part at the upper part, and the barrel body and the dome are of single-side steel plate ultra-high performance concrete structures; the single-side steel plate 1 is arranged on the inner side of the containment, the T-shaped stiffening ribs 2, the studs 3 and the shear ribs 4 are uniformly distributed on the steel plate, the T-shaped stiffening ribs 2 are arranged in an oblique or orthogonal grid shape, the T-shaped stiffening ribs 2, the studs 3 and the shear ribs 4 are respectively welded and fixed with the steel plate 1, and the tops of the shear ribs 4 are provided with straight thread anchoring plates as shown in figure 3. The T-shaped stiffening ribs 2, the studs 3 and the shear resistant ribs 4 are all embedded in the ultra-high performance concrete 5, holes can be formed in webs of the T-shaped stiffening ribs 2, namely, the T-shaped stiffening ribs are of an open-web structure, and therefore the weight of the whole containment vessel is reduced. The shear resistant bar 4 is fixed with the node of the reinforcing mesh 15 outside the ultra-high mixing performance concrete through the straight thread anchoring plate 6 at the top of the shear resistant bar. The dome is provided with a preformed hole 14, and a single-side steel plate ultra-high performance concrete single-layer containment A is fixed on a foundation B.
The structure of the tooling for the preformed hole 14 of the single-side steel plate ultra-high performance concrete single-layer containment is shown in fig. 4, and the tooling is composed of a reinforcing ring 7, a cover plate 8, a high-strength bolt 9, a ring-shaped flange 10, a stiffened ribbed plate 11, a flexible sealing material 12 and a detachable inhaul cable; the reinforcing ring 7 is fixed relative to the dome, and the reinforcing ring 7 protrudes out of the top surface of the dome; the outer surface of apron 8 and the internal surface of beaded finish 7 process respectively and have upper and lower step, through the upper and lower step of apron 8 surface and 7 internal surfaces of beaded finish, apron 8 is fixed in beaded finish 7, the top of beaded finish 7 and apron 8 is arranged in to annular flange 10, and guarantee the relatively fixed of beaded finish 7 and apron 8 through high strength bolt 9, be equipped with flexible sealing material 12 between the contact surface of beaded finish 7 and apron 8, be equipped with the floor 11 of stiffening between beaded finish 7 and the dome, be equipped with between apron 8 and the dome and dismantle cable 13.
The construction method of the single-side steel plate ultra-high performance concrete single-layer containment vessel comprises the following steps:
(1) calculating the section form of the single-side steel plate ultrahigh-performance concrete structure according to various preset load working conditions and combinations, including accident temperature rise and internal pressure in a containment, earthquake load, construction load, constant activity action, large airplane impact action and the like, wherein the section form includes section size, steel plate thickness, specification and spacing of T-shaped stiffening ribs arranged in an oblique or orthogonal grid;
(2) determining the structural form of the annular reinforcing structure at the periphery of the opening of the dome and the connection design between the annular reinforcing structure and the cover plate through calculation, wherein the structural form comprises the stiffening rib plate spacing of the annular reinforcing structure and the type selection and arrangement of high-strength friction bolts;
(3) processing a containment steel plate, and a T-shaped stiffening rib 2, a stud 3 and a shear rib 4 which are connected with the containment steel plate into a whole, and forming a segmented steel plate module by considering the feasibility of construction;
(4) after the steel plate module is hoisted in place, binding a reinforcing mesh on the other side of the containment without the steel plate, fixing the shear ribs through the straight thread anchoring plates on the top and the intersection points of the two-way reinforcing steel bars of the reinforcing mesh, and erecting an ultrahigh-performance concrete pouring template on the outer side;
(5) pouring ultrahigh-performance concrete between the single-side steel plate and the erected template, and pouring the ultrahigh-performance concrete layer by layer and upwards to a dome section in a segmented manner;
(6) the single-side steel plate 1 and the T-shaped stiffening rib 2 at the bottom of the dome section form a template, the steel bar mesh 15 is bound after the template is installed in place, and the shear resistant bars are fixed through the straight thread anchoring plate at the top and the two-way steel bar intersection point of the steel bar mesh;
(7) pouring ultra-high performance concrete on a steel plate at the bottom of the dome to finally form a single-side steel plate ultra-high performance concrete single-layer containment structure with a hoisting hole reserved at the dome;
(8) the cover plate is hoisted to the top of the dome, positioning, installation, sealing and fastening are carried out, and the detachable inhaul cable is additionally arranged between the bottom of the dome and the bottom of the cover plate to carry out secondary connection.
The invention is described in detail below with reference to the accompanying drawings:
fig. 1 is a schematic diagram of the overall structure of a single-layer containment structure of the present invention, including a lower barrel portion and an upper dome portion, fig. 2 is a top view of a steel structure (steel plate + T-shaped stiffeners) inside the containment of the present invention, and fig. 3 is a partially enlarged view of fig. 1, i.e., a schematic diagram of the T-shaped stiffeners, studs, and shear ribs on a single-sided steel plate.
As shown in fig. 3, the cylinder and the dome structure are of a single-side steel plate ultra-high performance concrete structure, the steel plate 1 is arranged on the inner side of the containment, and the outer surface of the steel plate is provided with oblique or orthogonal T-shaped stiffening ribs 2, studs 3 and shear-resistant ribs 4 which are all embedded in the ultra-high performance concrete 5. The closed structure formed by the steel plate 1 can ensure the requirements of internal pressure under the accident condition and pressure bearing and sealing in the containment vessel; the stud 3 can ensure the buckling stability of the steel plate under external plane compression; the shear resistant ribs 4 and the reinforcing mesh on the other side of the containment without the steel plate are fixed at reinforcing mesh nodes through straight thread anchoring plates 6, an integrated structure is formed after concrete is poured, and the integrated structure becomes an anti-shear resistant system for resisting the collision of an airplane outside the containment, and the inner side steel plate 1 can greatly improve the airplane collision resistance of the containment, reduce collision deformation and simultaneously prevent vector blocks of broken back concrete from influencing a nuclear grade pipeline in the containment.
Under the action of temperature and internal pressure in the containment, great hoop tensile stress can occur in the general containment, if common concrete is adopted, the common concrete is easy to crack, and the cracking of the concrete outside the containment is avoided by adopting the ultra-high performance concrete with ultra-high tensile compression capacity as the outer filler of the single-layer steel plate ultra-high performance concrete.
Considering that major possession equipment arrival time is inconsistent and major possession equipment overhaul and follow-up change during equipment operation, can see in figure 2 and be equipped with preformed hole 14 on the dome, shown in figure 4 that the dome part is considered and is faced the dome preformed hole design that combines forever, preformed hole 14 periphery adopts annular reinforcing structure 7 to salient in dome top surface, 8 bottoms of apron and the high strength bolt entrance to a cave of reserving of dome bottom adopt high strength bolt 9 to be connected fixedly, entrance to a cave bottom is opened the below and is equipped with the floor that the annular was arranged and is strengthened, but 8 tops of apron are connected with the apron through circumference angle regulation ring type flange 10 and high strength bolt 9, the entrance to a cave reinforced structure outside is equipped with the floor 11 of stiffening equally. When the follow-up large-piece equipment needs to be replaced in the service life, the cover plate can be detached and opened through the high-strength bolt. The gap between the cover plate and the opening of the dome is filled with a flexible sealing material 12 with high strength, so that the sealing performance under the pressure in the dome is guaranteed, and the waterproof function outside the dome is met.
The temporary combined preformed hole and the cover plate are always connected, the cover plate is connected with the dome annular reinforcing structure through the high-strength bolt and the annular flange, in addition, the detachable stay cable 13 is additionally arranged between the dome and the bottom of the cover plate to be connected secondarily and serves as a redundant defense line, and the cover plate is prevented from being directly impacted by a large airplane to cause the cover plate to fall off, so that the equipment in the containment vessel is prevented from being damaged.
The construction of the containment shell considers the modular design and construction concept, the single-side steel plate 1 and the oblique or orthogonal T-shaped stiffening ribs 2 on the inner side of the cylinder body can replace part of the ultrahigh-performance concrete pouring template, and the single-side steel plate 1 and the T-shaped stiffening ribs 2 on the bottom of the dome can be directly used as the ultrahigh-performance concrete pouring template, so that the construction difficulty of the engineering is reduced, the engineering progress is accelerated, and the engineering economy is improved.
The flow schematic diagram of the construction method of the single-side steel plate ultra-high performance concrete single-layer containment vessel is shown in fig. 6, and the specific implementation steps are as follows:
step 1, calculating the section form of the single-side steel plate ultrahigh-performance concrete structure according to various preset load working conditions and combinations, including accident temperature rise and internal pressure in a containment vessel, earthquake load, construction load, constant activity action, large airplane impact action and the like, wherein the section form includes section size, steel plate thickness, specification and spacing of oblique or orthogonal grid arrangement T-shaped stiffening ribs and the like;
step 4, after the steel plate module is hoisted in place, binding a reinforcing mesh 15 on the other side of the containment vessel without the steel plate 1, fixing the shear resistant ribs 4 through the straight thread anchoring plates 6 on the top and the intersection points of the reinforcing steel bars of the reinforcing mesh 15, and erecting an ultrahigh-performance concrete pouring template on the outer side;
the single-side steel plate T-shaped stiffening rib at the bottom of the dome section forms a template by itself, after the template is installed in place, the reinforcing mesh is bound, and the shear resistant ribs are fixed through the straight thread anchoring plate at the top and the two-way reinforcing steel bar intersection points of the reinforcing mesh;
directly pouring ultrahigh-performance concrete on the single-side steel plate single-layer containment structure, and finally forming the single-side steel plate ultrahigh-performance concrete single-layer containment structure with the hoisting holes reserved at the dome;
and 6, hoisting the cover plate to the top of the dome, positioning, installing, sealing and fastening, and additionally arranging a detachable stay cable between the dome and the bottom of the cover plate for secondary connection.
Claims (2)
1. A single-side steel plate ultra-high performance concrete single-layer containment vessel is characterized in that the single-side steel plate ultra-high performance concrete single-layer containment vessel is composed of a lower cylinder body part and an upper dome part, and the cylinder body and the dome are of single-side steel plate ultra-high performance concrete structures; the steel plate is arranged at the inner side of the containment, the T-shaped stiffening ribs, the studs and the shear ribs which are arranged in an oblique or orthogonal grid shape are uniformly distributed on the steel plate, and the T-shaped stiffening ribs, the studs and the shear ribs are respectively welded and fixed with the steel plate; the shear resistant ribs are fixed through the straight thread anchoring plates at the tops of the shear resistant ribs and the intersection points of the reinforcing steel bars of the reinforcing steel bar net on the outer side of the containment wall; a reserved hole is formed in the dome, and the single-side steel plate ultra-high performance concrete single-layer containment is fixed on the foundation; the tool for reserving the hole consists of a reinforcing ring, a cover plate, a high-strength bolt, an annular flange, a reinforcing rib plate, a flexible sealing material and a detachable inhaul cable; the reinforcing ring is fixed relative to the dome and protrudes out of the top surface of the dome; the outer surface of apron and the internal surface of beaded finish have processed upper and lower step respectively, through the upper and lower step of apron surface and beaded finish internal surface, the apron is fixed in the beaded finish, the top of beaded finish and apron is arranged in to the annular flange to guarantee the relatively fixed of beaded finish and apron through high strength bolt, be equipped with flexible sealing material between the contact surface of beaded finish and apron, be equipped with the floor of stiffening between beaded finish and the dome, be equipped with the cable of dismantling between apron and the dome.
2. The construction method of the single-sided steel plate ultra-high performance concrete single-layer containment vessel as claimed in claim 1, characterized by comprising the following steps:
(1) calculating the section form of the single-side steel plate ultrahigh-performance concrete structure according to various preset load working conditions and combinations, including accident temperature rise and internal pressure in a containment, earthquake load, construction load, constant activity action and large airplane impact action, wherein the section form includes section size, steel plate thickness, specification and spacing of T-shaped stiffening ribs arranged in an oblique or orthogonal grid;
(2) determining the structural form of the annular reinforcing structure at the periphery of the opening of the dome and the connection design between the annular reinforcing structure and the cover plate through calculation, wherein the structural form comprises the spacing of stiffening rib plates of the annular reinforcing structure and the selection and arrangement of high-strength bolts;
(3) processing a containment steel plate and T-shaped stiffening ribs, studs and shear ribs which are connected with the containment steel plate into a whole, and forming segmented steel plate modules by considering the feasibility of construction;
(4) after the steel plate module in the step (3) is hoisted in place, binding a reinforcing mesh on the other side of the containment without the steel plate, fixing the shear ribs through the straight thread anchoring plates on the top and the two-way reinforcing steel bar intersection points of the reinforcing mesh, and erecting an ultrahigh-performance concrete pouring template on the outer side;
(5) pouring ultrahigh-performance concrete between the single-side steel plate and the erected template, and pouring the ultrahigh-performance concrete layer by layer and upwards to a dome section in a segmented manner;
(6) a single-side steel plate and a T-shaped stiffening rib at the bottom of the dome section form a template, a reinforcing mesh is bound after the template is installed in place, and shear ribs are fixed through the intersection points of the straight thread anchoring plate at the top and the two-way reinforcing steel bars of the reinforcing mesh;
(7) pouring ultra-high performance concrete on a steel plate at the bottom of the dome to finally form a single-side steel plate ultra-high performance concrete single-layer containment structure with a hoisting hole reserved at the dome;
(8) the cover plate is hoisted to the top of the dome, positioning, installation, sealing and fastening are carried out, and the detachable inhaul cable is additionally arranged between the bottom of the dome and the bottom of the cover plate to carry out secondary connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010273143.5A CN111561194B (en) | 2020-04-09 | 2020-04-09 | Reactor single-side steel plate ultra-high performance concrete single-layer containment vessel and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010273143.5A CN111561194B (en) | 2020-04-09 | 2020-04-09 | Reactor single-side steel plate ultra-high performance concrete single-layer containment vessel and construction method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111561194A CN111561194A (en) | 2020-08-21 |
| CN111561194B true CN111561194B (en) | 2021-08-24 |
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| CN113027210A (en) * | 2021-02-05 | 2021-06-25 | 上海核工程研究设计院有限公司 | Cast-in-place ultra-high performance concrete (UHPC) combined shielding shell |
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