CN115324343B - Construction method for embedding large-sized radiation-proof steel plates in shear wall - Google Patents
Construction method for embedding large-sized radiation-proof steel plates in shear wall Download PDFInfo
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- CN115324343B CN115324343B CN202211087935.9A CN202211087935A CN115324343B CN 115324343 B CN115324343 B CN 115324343B CN 202211087935 A CN202211087935 A CN 202211087935A CN 115324343 B CN115324343 B CN 115324343B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 282
- 239000010959 steel Substances 0.000 title claims abstract description 282
- 238000010276 construction Methods 0.000 title claims abstract description 48
- 239000004567 concrete Substances 0.000 claims abstract description 64
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 230000002787 reinforcement Effects 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 230000011218 segmentation Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 16
- 238000003466 welding Methods 0.000 claims description 13
- 238000013461 design Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 7
- 238000009415 formwork Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/01—Flat foundations
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/84—Walls made by casting, pouring, or tamping in situ
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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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
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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
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/04—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for lintels, beams, or transoms to be encased separately; Special tying or clamping means therefor
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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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
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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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/005—Strips for covering joints between form sections, e.g. to avoid burring or spilling of laitance
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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
- E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
- E04G17/14—Bracing or strutting arrangements for formwalls; Devices for aligning forms
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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
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- 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
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/06—Solidifying concrete, e.g. by application of vacuum before hardening
-
- 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
- E04G21/14—Conveying or assembling building elements
-
- 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
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
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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
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/162—Handles to carry construction blocks
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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
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/163—Jacks specially adapted for working-up building elements
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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
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/167—Tools or apparatus specially adapted for working-up plates, panels or slab shaped building elements
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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
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
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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
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
- E04G21/185—Means for positioning building parts or elements for anchoring elements or elements to be incorporated in the structure
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Load-Bearing And Curtain Walls (AREA)
Abstract
The invention discloses a construction method for embedding a large-scale radiation-proof steel plate in a shear wall, which comprises the following steps of S1, steel plate segmentation; s2, manufacturing a pre-buried cavity; s3, removing the template and cleaning the cavity; s4, positioning and paying off a large steel plate; s5, conveying the pre-buried steel plates into the field, hoisting and splicing the pre-buried steel plates in staggered joints; s6, transverse reinforcement; s7, concrete pouring is performed, and the construction method for pouring the embedded steel plate base by adopting the construction method of dividing the large steel plate into blocks in advance and reserving the cavity in advance is adopted, so that the operability of hoisting embedded safety and precision of the large steel plate is improved, the integral forming quality of a concrete structure is improved, and the hoisting stability and safety of the ultra-thick heavy iron block are improved through the manufacturing of the embedded cavity.
Description
Technical Field
The invention relates to the field of repairing buildings in traveling, in particular to a construction method for embedding large-scale radiation-proof steel plates in shear walls.
Background
With the rapid development of world medical science and technology, in the field of medical and health, along with the appearance of medical equipment with high technology and new functions, the traditional building structure design type and material combination are difficult to meet the requirements of related medical facilities, and in order to meet the use of equipment functions and improve the use effect, the building structure itself must start from building material compositions and adopt some new technologies and construction processes.
In the medical building project, in order to meet the radiation-proof safe use requirement of heavy ion medical facility equipment, the structural design changes the conventional structural material selection, a novel technology of embedding large-scale steel plates is adopted in the limited shear wall structure size, and particularly the large size and weight of 900mm and 150mm thick embedded iron blocks in the shear wall structure bring certain challenges to the construction processes of transportation, hoisting and fixing, concrete formwork pouring and the like. .
Disclosure of Invention
The invention aims to provide a construction method for embedding large-scale radiation-proof steel plates in a shear wall aiming at the defects of the prior art.
The technical scheme adopted for solving the technical problems is as follows: the construction method for embedding the large-scale radiation-proof steel plate in the shear wall comprises the following steps:
S1, steel plate segmentation: dividing a large steel plate to be pre-buried into small steel plates meeting the requirement of transportation and splicing installation;
S2, manufacturing a pre-buried cavity: firstly, concrete pouring is completed on the shear wall at the corresponding position of the large steel plate, when in pouring construction, the bottom elevation is reserved according to the later period, the bottom elevation is pre-buried with the steel plate, the concrete cavity with a certain size is enlarged in the plane size, the positions of the steel bars are adjusted under the condition that the number of the reinforced bars is not changed when the steel bars of the shear wall are bound and constructed, and the cavity template is supported and reinforced conveniently;
S3, removing the template and cleaning the cavity: after the cavity casting concrete meets the demolding condition, timely removing the template in the cavity, and cutting the template screw on the inner wall of the cavity;
s4, positioning and paying off a large steel plate: after the cavity chiseling and cleaning is completed, positioning and paying off are carried out according to the hoisting pre-buried positions and the hoisting pre-buried sizes of the steel plates after the large steel plates are split in a staggered mode, and positioning backing plates are welded at the bottoms of the side edges of the cavity according to the edge positions of the side steel plates;
S5, conveying the pre-buried steel plates into the ground, hoisting and splicing the staggered joints: after optimizing a whole large steel plate into a single small steel plate, transporting the approach and the on-site lifting point in a separated mode, firstly lifting the side steel plates through a positioning base plate, and connecting and fixing the position of the seam on the upper surface with the fixed steel plates through welding after the adjustment of the side steel plates of the steel plates which are sequentially lifted later;
S6, transverse reinforcement: in the hoisting and splicing process of single steel plates, bonding all the steel plates in place through auxiliary tools, then carrying out transverse welding and reinforcing, and finally, after hoisting of the side steel plates, tightly propping and fixing the steel plates and the side walls of the cavity at the bottom by using wedge-shaped metal steel blocks;
S7, concrete pouring: and (3) carrying out concrete pouring construction in the cavity of the hoisted steel plate, wherein the concrete pouring is required to uniformly pour the cavities around the steel plate and strengthen vibration in batches.
Preferably, in S1, the size of the large steel plate to be pre-buried is 900 ✕ 10000 ✕ (H), the large steel plate is divided into small steel plates by adopting a transverse staggered joint block production mode, and the size of the small steel plates is 100 ✕ 1250 ✕ (H) and 100 ✕ 2500 ✕ (H).
Preferably, in the step S3, when the screw rods are cut, a screw rod with the length of 5cm is reserved at the two ends corresponding to the bottom and the upper edge of each small steel plate at the outer side respectively and is used for auxiliary positioning and connection fixation of hoisting of the small steel plates at the later stage.
Preferably, in S5, the top of the steel plate is tightly attached to the positioning backing plate by utilizing the jacking device, after the perpendicularity is adjusted, the upper edge of the steel plate is welded and fixed with 5cm screws reserved at the two ends in advance by utilizing the steel bars, and the installation of the side steel plate is completed.
Preferably, S5 further comprises the steps of:
S51, positioning and paying off a small steel plate: marking the outer wall steel bars and the poured outer wall surface according to the position and elevation of the pre-buried steel plates of the design drawing on site, and positioning and paying off according to the pre-buried position of the fixing support of the construction scheme;
S52, machining the I-steel frame: compared with the thickness of the small steel plate, the thickness of the I-steel is widened by 3 centimeters, and the I-steel is welded and connected into a frame according to requirements;
S53, pre-embedding and reinforcing the I-steel: after the binding of the wall steel bars is completed, accurately hoisting, welding and fixing the frame on the wall steel bars according to the paying-off positions;
S54, pouring I-steel embedded concrete: when the concrete base is reserved and the concrete is poured, the vibration is reinforced at the I-steel part, the concrete is ensured to be compact, and the length and the width of the concrete base are as follows: 4200mm, 800mm;
S55, hoisting a small steel plate: and after the I-steel is embedded, the concrete is poured to the required elevation, the pouring of the concrete base is finished, the strength meets the steel plate lifting requirement, the small steel plate lifting construction is carried out, and the small steel plate is integrally lifted into the I-steel gap.
Preferably, in S6, after the hoisting of the steel plate is completed, fixing the I-steel at the upper opening of the steel plate, adopting the long I-steel with the length of 600mm, welding two ends of the I-steel upright rod, connecting the I-steel at two sides of the steel plate into a whole, enhancing the stability of the steel plate and playing a role of transverse reinforcement.
Preferably, in S7, after the hoisting and fixing of the embedded steel plate are completed, the haunched beam concrete is subjected to formwork pouring, and the vibration of the concrete around the i-steel is reinforced during the pouring of the concrete.
Compared with the prior art, the invention has the beneficial effects that:
1. the problems of transportation and hoisting are effectively solved by dividing the ultra-thick embedded large steel plate into small iron blocks with smaller size and weight.
2. The working procedure method of reserving the cavity and then hoisting is adopted, so that the hoisting stability and the safety of the ultra-thick heavy iron block are improved.
3. The position expansion optimization of the steel plate cavity meets the construction requirements of steel plate positioning and hoisting fixation, and the operability of the position accuracy of the embedded steel plate is effectively improved.
4. The embedded steel plates are lifted and fixed in the cavity after the construction of the shear wall is completed, and the problem that the cast-in-place concrete shear wall cannot be reinforced by opposite pulling due to embedded large steel plate formwork bolts is effectively solved through the optimization of the construction process.
5. The construction method of pre-burying the positioning I-steel bracket and then hoisting the steel plate is adopted in the construction of the large pre-buried steel plate, so that the problems of limited construction surface of the basement outer wall and improvement of pre-buried safety and stability are effectively solved.
6. The elevation of the bottom of the large-scale embedded steel plate is above the elevation of the bottom of the haunched beam, the haunched beam is only cast locally by the embedded steel plate base, and the reinforced concrete of the haunched beam is cast in a synchronous construction mode in the later stage, so that the molding quality of the haunched beam is ensured.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic view of a shear wall design embedded large steel plate
FIG. 2 is a large sample diagram of large steel plate staggered joint blocking;
FIG. 3 is a plan view of a pre-buried cavity reservation;
FIG. 4 is a steel plate hoisting and splicing flow chart;
FIG. 5 is a tooling view of a I-steel frame;
FIG. 6 is a pre-buried planar layout of I-steel;
FIG. 7 is a pre-buried floor plan of the I-steel;
FIG. 8 is a schematic view of a concrete placement height and a foundation
Fig. 9 is a diagram of the end connection of the two-sided i-steel.
Detailed Description
The technical scheme of the invention is described in detail below through the drawings, but the protection scope of the invention is not limited to the embodiments.
Referring to fig. 1 to 9, the construction method for embedding large-scale radiation-proof steel plates in a shear wall comprises the following steps:
s1, steel plate segmentation: the heavy steel plate (also called shielding steel plate) with the project design size of 900 ✕ 10000 ✕ 4000 (H) is embedded in the cast-in-place concrete shear wall with the thickness of 2.6 meters, the single embedded steel plate has huge size, the total weight reaches about 280T, and the on-site mechanical equipment cannot realize the transportation and hoisting of the whole embedded steel plate.
Combining the use function requirement of a building structure, avoiding transverse straight joints of the embedded steel plates, determining to optimize the steel plate embedded construction process, dividing the large steel plates into a plurality of smaller-sized steel plates of 100 ✕ 1250 ✕ 4000 (H) and 100 ✕ 2500 ✕ 4000 (H) by adopting a transverse staggered joint block production mode, reducing the size and weight of single embedded steel plates, and enabling on-site mechanical equipment to meet the condition of steel plate transportation and hoisting;
S2, manufacturing a pre-buried cavity: firstly, concrete pouring is completed on the shear wall at the corresponding position of the large steel plate, a concrete cavity with the bottom elevation equal to the pre-buried bottom elevation of the steel plate is reserved according to the later stage in the pouring construction, the bearing safety can be guaranteed by taking a cavity concrete foundation as a base for hoisting the later stage steel plate, in order to facilitate the accurate hoisting and pre-buried adjustment construction of the later stage block steel plate, the plane size of the concrete cavity is enlarged by 10 centimeters, the influence of the pre-buried large steel plate on the construction of the shear wall steel bars is considered, the positions of the steel bars are required to be adjusted under the condition that the number of the reinforcing bars is not changed according to the size of the reserved cavity in the binding construction of the shear wall steel bars, and the supporting and reinforcing of the cavity template are facilitated;
S3, removing the template and cleaning the cavity: after the cavity pouring concrete meets the form removal condition, timely removing the form in the cavity, cutting the form screw on the inner wall of the cavity, and paying attention to reserving a screw with the length of 5cm at the bottom of each small steel plate at the outer side and at the two ends of the upper edge during cutting the screw for auxiliary positioning and connection fixation of later-stage steel plate hoisting. And (4) according to the hoisting embedded position and elevation of the steel plate, chiseling the periphery and the bottom of the cavity to be smooth and clean.
S4, positioning and paying off a large steel plate: after the cavity is picked up and cleaned, positioning and paying-off are carried out according to the pre-buried positions and sizes of the steel plates after the large steel plates are split in a staggered joint mode, so that the subsequent determination of the lifting positions of the steel plates with different sizes is facilitated. Welding a positioning backing plate at the bottom of the side edge of the cavity according to the edge line position of the side edge steel plate, and using the positioning backing plate for assisting in the installation, the jacking and the positioning of the steel plate;
S5, conveying the pre-buried steel plates into the ground, hoisting and splicing the staggered joints: after the whole large-scale embedded steel plate is optimized into a single small steel plate, the conditions of separate transportation approach and on-site hoisting installation are met, and the on-site root paying-off positioning and the positions of the steel plates with different sizes are sequentially completed in a staggered joint hoisting splicing mode.
When hoisting side small steel plates, tightly fitting the steel plate top with a positioning backing plate by using a jacking device at the adjusted position, and welding and fixing the upper edge of the steel plate by using a 5cm short screw reserved in advance at the two ends of the steel plate by using a steel bar after the verticality is adjusted, so that the steel plate is prevented from tilting in the subsequent steel plate hoisting construction process. After position adjustment of the small steel plates hoisted sequentially is completed, the positions of the upper surface edge joints are fixedly connected with the fixed steel plates through welding, and the hoisting and mounting process of the small steel plates is as follows:
S51, positioning and paying off a small steel plate: this design 150mm thick pre-buried steel sheet is located basement outer wall haunch roof beam, and the steel sheet specification is: 150mm multiplied by 4000mm multiplied by 3432 (H) mm, marking the outer wall steel bars and the poured outer wall surface on site according to the position and elevation of the pre-buried steel plates of the design drawing, and positioning and paying off according to the pre-buried position of the fixing support of the construction scheme;
S52, machining the I-steel frame: because the height of the embedded shielding steel plate is 3432mm, the length is 4000mm, and the processing length of the I-steel of No. 12 needs to reach 6500mm and the concrete embedded depth can reach 2310mm in consideration of the embedded depth of the I-steel, the I-steel is widened by 3 cm compared with each side of the thickness of the steel plate in order to ensure that the steel plate of 150mm can be smoothly hoisted in the later stage. In addition, because the hidden columns exist at the 150mm steel plate in the project, the distance between the steel bars of the hidden columns is small, and the I-steel is difficult to pre-embed, the I-steel is not pre-embedded at the hidden columns, the distances between the I-steel at other positions are properly encrypted, and the distances are distributed according to 400mm distances. The fixed frames are welded and connected through square steel according to requirements, so that the follow-up integral hoisting and fixing are facilitated;
S53, pre-embedding and reinforcing the I-steel: after the binding of the wall steel bars is completed, accurately hoisting, welding and fixing the frame on the wall steel bars according to the paying-off positions, and paying attention to the fact that the frame is fixed: the verticality is strictly controlled, and if the I-steel is too inclined, the hoisting of the shielding steel plate is affected; when the I-steel is pre-buried, accurate positioning is required, and the pre-buried elevation is strictly controlled.
S54, pouring I-steel embedded concrete: when the concrete base is reserved and the concrete is poured, the vibration is reinforced at the I-steel part, the concrete is ensured to be compact, and the length and the width of the concrete base are as follows: 4200mm, 800mm;
S55, hoisting a small steel plate: after the I-steel is reserved, concrete is poured to the required elevation, and the pouring strength of the concrete base meets the steel plate lifting requirement, carrying out shielding steel plate lifting construction, lifting a whole shielding steel plate into an I-steel gap, wherein the connection direction affecting steel plate lifting can be just cut off, and stirrups of a hidden column and other positions conflicting with the steel plate can be broken and welded on the steel plate;
S6, transverse reinforcement: in the hoisting and splicing process of single steel plates, bonding all steel plates in place through auxiliary tools, then carrying out transverse welding and reinforcing, after the hoisting of the steel plates at the side surfaces is finished, tightly propping and fixing the steel plates and the side walls of the cavity at the bottom by using wedge-shaped metal steel blocks, wherein the auxiliary tools are the reinforcing methods, namely, after the hoisting of the steel plates is finished, I-shaped steel at the upper opening of the steel plates is fixed, and two ends of an I-shaped steel upright rod are welded by adopting 600mm long I-shaped steel, so that the I-shaped steel at the two sides of the steel plates are connected into a whole, and the stability is enhanced;
s7, concrete pouring: after the hoisting and fixing of the embedded steel plates are completed, the formwork pouring can be carried out on the haunched beam concrete, the vibration of the cavity around the steel plates and the concrete around the I-shaped steel is required to be enhanced when the concrete is poured, and the forming quality of the structural concrete is improved.
The process principle of the invention is as follows:
1. According to the design size of the embedded part steel plate, concrete pouring is finished on the shear wall at the corresponding position of the large-sized steel plate member with the thickness of 900mm, when in pouring construction, according to the requirement of hoisting embedded construction of the later-stage steel plate, the bottom elevation and the embedded bottom elevation of the steel plate are reserved, the concrete cavity with a certain size is relatively enlarged in the plane size, and the adjustment of the positioning precision of the later-stage steel plate member is facilitated.
2. By adjusting the construction procedures of the cast-in-place concrete shear wall and the hoisting of the steel plates, the bearing foundation embedded in the steel plates is poured in advance, and a series of problems that the stability of the ultra-heavy embedded steel plate bracket is difficult to control, the safety is difficult to ensure, the operability is difficult to implement and the like are solved.
3. In combination with limiting conditions of the field actual construction hoisting machinery, manufacturers of the coordinated embedded steel plates divide the large steel plates into small steel plates meeting the requirements of transportation and splicing installation in the component production process, and the purpose of meeting the hoisting staggered joint splicing of the field construction machinery is achieved by the relatively smaller size after division.
4. Considering the fact that the vertical face of the embedded 900mm thick steel plate in the cast-in-place concrete shear wall is large in size, the shear wall template screw rod cannot penetrate through the thick steel plate to be subjected to drawknot reinforcement, the template pull rod is welded to the embedded steel plate spliced by staggered joint, the safety stability is difficult to guarantee, after the casting of the ultra-thick concrete shear wall is completed, the steel plate in the cavity is hoisted, and the problem that the steel plate collides with the template screw rod is effectively solved.
5. The embedded position of the 150mm steel plate is in the haunched beam of the basement, the elevation of the bottom of the embedded steel plate is above the elevation of the bottom of the haunched beam, the haunched Liang Peijin is complex in structure, in order to improve the integrated forming quality of steel bar construction and concrete pouring, an I-shaped steel fixing bracket of the embedded steel plate is adopted, then the construction procedures of hoisting the steel plate and concrete pouring embedding are carried out, and in the process of embedding the I-shaped steel fixing bracket, a steel plate concrete base is locally poured in the haunched beam to the steel plate embedded elevation.
As above, although the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limiting the invention itself. Various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The construction method for embedding the large-scale radiation-proof steel plate in the shear wall is characterized by comprising the following steps of:
S1, steel plate segmentation: dividing a large steel plate to be pre-buried into small steel plates meeting the requirement of transportation and splicing installation;
S2, manufacturing a pre-buried cavity: firstly, concrete pouring is completed on the shear wall at the corresponding position of the large steel plate, when in pouring construction, the bottom elevation is reserved according to the later period, the bottom elevation is pre-buried with the steel plate, the concrete cavity with a certain size is enlarged in the plane size, the positions of the steel bars are adjusted under the condition that the number of the reinforced bars is not changed when the steel bars of the shear wall are bound and constructed, and the cavity template is supported and reinforced conveniently;
S3, removing the template and cleaning the cavity: after the cavity casting concrete meets the demolding condition, timely removing the template in the cavity, and cutting the template screw on the inner wall of the cavity;
s4, positioning and paying off a large steel plate: after the cavity chiseling and cleaning is completed, positioning and paying off are carried out according to the hoisting pre-buried positions and the hoisting pre-buried sizes of the steel plates after the large steel plates are split in a staggered mode, and positioning backing plates are welded at the bottoms of the side edges of the cavity according to the edge positions of the side steel plates;
S5, conveying the pre-buried steel plates into the ground, hoisting and splicing the staggered joints: after optimizing a whole large steel plate into a single small steel plate, transporting the approach and the on-site lifting point in a separated mode, firstly lifting the side steel plates through a positioning base plate, and connecting and fixing the position of the seam on the upper surface with the fixed steel plates through welding after the adjustment of the side steel plates of the steel plates which are sequentially lifted later;
S6, transverse reinforcement: in the hoisting and splicing process of single steel plates, bonding all the steel plates in place through auxiliary tools, then carrying out transverse welding and reinforcing, and finally, after hoisting of the side steel plates, tightly propping and fixing the steel plates and the side walls of the cavity at the bottom by using wedge-shaped metal steel blocks;
S7, concrete pouring: and (3) carrying out concrete pouring construction in the cavity of the hoisted steel plate, wherein the concrete pouring is required to uniformly pour the cavities around the steel plate and strengthen vibration in batches.
2. The construction method for embedding large-sized radiation-proof steel plates in a shear wall according to claim 1, wherein in S1, the size of the large steel plates to be embedded is 900 ✕ 10000 ✕ (H), the large steel plates are divided into small steel plates by adopting a transverse staggered joint block production mode, and the sizes of the small steel plates are 100 ✕ 1250 ✕ (H) and 100 ✕ 2500 ✕ (H).
3. The construction method for embedding large-sized radiation-proof steel plates in a shear wall according to claim 1, wherein in the step S3, a screw rod with the length of 5cm is reserved at the two ends corresponding to the bottom and the upper edge of each outer small steel plate respectively when the screw rod is cut, and is used for auxiliary positioning and connection fixation of hoisting of the later small steel plates.
4. The construction method for embedding large-sized radiation-proof steel plates in a shear wall according to claim 3, wherein in S5, the top of the steel plates is tightly attached to a positioning base plate by using a jacking device, after the perpendicularity is adjusted, the upper edges of the steel plates are welded and fixed with 5cm screw rods reserved at the two ends in advance by using steel bars, and the installation of the side steel plates is completed.
5. The construction method for embedding large-scale radiation-proof steel plates in a shear wall according to claim 1, wherein in S5, the hoisting assembly steps of the basement outer wall haunched Liang Naxiao steel plates are as follows:
S51, positioning and paying off a small steel plate: marking the outer wall steel bars and the poured outer wall surface according to the position and elevation of the pre-buried steel plates of the design drawing on site, and positioning and paying off according to the pre-buried position of the fixing support of the construction scheme;
s52, machining the I-steel frame: the frames are welded and connected through I-steel according to the size requirement;
S53, pre-embedding and reinforcing the I-steel: after the binding of the wall steel bars is completed, accurately hoisting, welding and fixing the frame on the wall steel bars according to the paying-off positions;
S54, pouring I-steel embedded concrete: when the concrete base is reserved and the concrete is poured, the vibration is reinforced at the I-steel part, the concrete is ensured to be compact, and the length and the width of the concrete base are as follows: 4200mm, 800mm;
S55, hoisting a small steel plate: and after the I-steel is embedded, the concrete is poured to the required elevation, the pouring of the concrete base is finished, the strength meets the steel plate lifting requirement, the small steel plate lifting construction is carried out, and the small steel plate is integrally lifted into the I-steel gap.
6. The construction method for embedding large-sized radiation-proof steel plates in a shear wall according to claim 5, wherein in S6, after the steel plates are lifted, fixing the I-steel at the upper opening of the steel plates, welding two ends of the I-steel upright rod by adopting the I-steel with the length of 600mm, connecting the I-steel at two sides of the steel plates into a whole, enhancing the stability of the steel plates, and playing a role of transverse reinforcement.
7. The construction method for embedding large-scale radiation-proof steel plates in a shear wall according to claim 6, wherein in the step S7, after the embedded steel plates are lifted and fixed, the haunched beam concrete is subjected to formwork pouring, and the vibration of the concrete around the I-shaped steel is reinforced during the pouring of the concrete.
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| CN103046759A (en) * | 2013-01-18 | 2013-04-17 | 上海建工一建集团有限公司 | Shielding steel plate correction construction technology |
| CN103321324A (en) * | 2013-06-03 | 2013-09-25 | 江苏沪宁钢机股份有限公司 | Truss nodal region super-thick steel plate wall and building method thereof |
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| KR200447157Y1 (en) * | 2007-11-12 | 2009-12-29 | 테크원네이버(주) | An install structure of shield steel plate for radiation clinic room |
| CN104631666B (en) * | 2015-01-20 | 2016-10-05 | 广东省建筑工程集团有限公司 | A kind of super thick built-in wall steel plate waterproof radioprotective construction method |
| CN104948228B (en) * | 2015-07-14 | 2017-04-19 | 广东省建筑工程集团有限公司 | Construction method of large high-precision anti-radiation tunnel shielding iron structure |
| CN206681199U (en) * | 2017-04-20 | 2017-11-28 | 北京工业大学 | Damping stereotype concrete wall with radiation proof function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103046759A (en) * | 2013-01-18 | 2013-04-17 | 上海建工一建集团有限公司 | Shielding steel plate correction construction technology |
| CN103321324A (en) * | 2013-06-03 | 2013-09-25 | 江苏沪宁钢机股份有限公司 | Truss nodal region super-thick steel plate wall and building method thereof |
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