CN116446581A - Novel construction method of steel structure floor support plate - Google Patents
Novel construction method of steel structure floor support plate Download PDFInfo
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- CN116446581A CN116446581A CN202310439593.0A CN202310439593A CN116446581A CN 116446581 A CN116446581 A CN 116446581A CN 202310439593 A CN202310439593 A CN 202310439593A CN 116446581 A CN116446581 A CN 116446581A
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- support plate
- floor support
- clamp
- bottom die
- leveling
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 203
- 239000010959 steel Substances 0.000 title claims abstract description 203
- 238000010276 construction Methods 0.000 title claims abstract description 69
- 238000011065 in-situ storage Methods 0.000 claims abstract description 19
- 238000000465 moulding Methods 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000004567 concrete Substances 0.000 claims description 64
- 238000003466 welding Methods 0.000 claims description 31
- 238000011084 recovery Methods 0.000 claims description 28
- 239000002002 slurry Substances 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 8
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Classifications
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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
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
- E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
- E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
- E04B5/40—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element with metal form-slabs
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/065—Light-weight girders, e.g. with precast parts
- E04C5/0653—Light-weight girders, e.g. with precast parts with precast parts
- E04C5/0656—Light-weight girders, e.g. with precast parts with precast parts with lost formwork
-
- 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
- E04G21/10—Devices for levelling, e.g. templates or boards
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
-
- 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)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to a novel construction method of a steel structure floor support plate, which comprises the following steps: the bottom die and the bottom die are recycled, the clamp structure of the reinforced bar truss floor support plate and the leveling-free high-precision cast-in-situ ground one-step pouring molding structure are adopted; the method comprises the following steps: manufacturing a steel bar truss of the floor support plate, manufacturing a bottom die, and forming holes on the bottom die; assembling the bottom die, recovering the steel bar truss floor support plate clamp structure, arranging and leveling-free high-precision cast-in-situ ground one-time pouring molding structure above the steel bar truss of the floor support plate, pouring the floor support plate, and recovering the external clamp and the connecting hole plugging member. The beneficial effects of the invention are as follows: the bottom die and the steel bars are firmly connected with the bottom die through the detachable clamp, so that the bottom die can be recycled after pouring of the floor support plate is completed, and the waste of materials is reduced; the auxiliary leveling of the leveling-free high-precision cast-in-situ ground one-time pouring molding structure is utilized, synchronous grouting is realized, and grouting time is shortened.
Description
Technical Field
The invention belongs to the field of constructional engineering, and particularly relates to a novel construction method of a steel structure floor support plate.
Background
At present, steel structure buildings are more and more common in building engineering, have lighter dead weight, high strength and simple construction, and are widely applied to the fields of large-scale factory buildings, stadiums, super high-rise buildings and the like. The construction of the floor support plate in the steel structure building is an important ring, the construction of the floor support plate is firstly to carry out steel bar truss floor support plate construction, then to carry out stud welding and steel bar binding construction, and finally to prop up the bottom die and to carry out concrete pouring.
In the prior art, the connection mode of the steel bar truss and the bottom die mainly has the following defects: 1) The traditional connection mode of the steel bar truss and the bottom die is mainly welding, so that the steel bar truss is energy-saving and environment-friendly; 2) The conventional connection mode of the steel bar truss and the bottom die is that trough positions of web member steel bars of the steel bar truss are welded with connecting steel bars, when the bottom die is installed, the connecting steel bars penetrate through connecting holes reserved on the bottom die, and then nuts are used for fixing the bottom die; after concrete pouring and curing are completed, the nuts are unscrewed and the bottom die is removed, and connecting steel bars are exposed on the bottom surface of the concrete floor slab at the moment, and the connecting steel bars are cut off to ensure the flatness of the floor slab, so that the subsequent treatment of the steel bar truss floor carrier plate related to the structure is complex; 3) After the floor is poured and formed in some construction modes, the bottom plate is used as a part of the floor and is not removed, so that the thickness of the floor is increased, the bottom die is not recyclable, and the construction cost is high although the construction is convenient.
Meanwhile, the floor flatness of the floor support plate is of great importance to the service life of the building, and the floor flatness treatment of the floor support plate in the prior art has the following disadvantages: 1) The flatness of the traditional floor concrete pouring control is that a horizontal mark is punched on a reinforcing steel bar extending out of a column to control the whole level, and the situation that the level precision can not meet the requirement possibly exists locally, and secondary leveling is needed; 2) The spacing between the column steel bars is larger, a long scraping rule is required to be adopted for scraping, the labor intensity is high, and the construction cost is high; 3) The slump is difficult to ensure uniformity during concrete pouring, the shrinkage of the concrete is uneven, and the horizontal mark is not used as a reference during light receiving, so that the leveling-free effect is difficult to achieve.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a novel construction method of a steel structure floor support plate.
The novel construction device of the steel structure floor support plate used by the novel construction method of the steel structure floor support plate comprises the following components: the bottom die and the bottom die are recycled, the clamp structure of the reinforced bar truss floor support plate and the leveling-free high-precision cast-in-situ ground one-step pouring molding structure are adopted;
the clamp structure of the bottom die recovery type steel bar truss floor support plate is in a scissor shape and comprises an external clamp, an internal clamp, bolts, connecting pieces and connecting steel bar connecting holes; the bottom of the external clamp is in a handle shape, the top of the external clamp is fixedly connected with the internal clamp through a connecting piece, the two groups of connected external clamps and the internal clamp are connected with each other by taking a bolt as a rotating shaft, and the bolt is arranged on the two external clamps; connecting steel bar connecting holes are formed in the two inner clamps and extend from the center of the inner clamps to one side of the inner clamps, and the extending directions of the connecting steel bar connecting holes in the two inner clamps are opposite;
the leveling-free high-precision cast-in-situ ground one-time pouring molding structure comprises a middle square leveling-free structure and a guide rail, wherein the middle square leveling-free structure moves along the guide rail, square standard sections are arranged on two sides of the middle square leveling-free structure, the rear parts of the bottoms of the middle square leveling-free structure and the square standard sections are connected with horizontal baffle plates through hinges, and the installation positions of the horizontal baffle plates are lower than the lower surface of the guide rail;
the bottom die is arranged below the pouring position of the floor support plate, and an internal clamp of the clamp structure of the floor support plate of the bottom die recovery type reinforced bar truss extends into the upper part of the bottom die from the lower part and is fixedly connected with the connecting reinforced bars of the floor support plate; the leveling-free high-precision cast-in-situ ground one-time casting molding structure is arranged above the casting position of the floor support plate.
As preferable: when the bottom die recovery type steel bar truss floor support plate clamp structure is closed, connecting steel bar connecting holes on the two inner clamps are partially overlapped to form a circular through hole, and the diameter of the circular through hole is matched with the diameter of the connecting steel bars of the floor support plate steel bar truss.
As preferable: the two outer clamps are respectively provided with a fixing member, and when the clamp structure of the bottom die recovery type reinforced bar truss floor support plate is closed, the fixing members on the two outer clamps are fixedly connected with each other; one end of the inner clamp, which is far away from the outer clamp, is provided with a fixed guide groove, and an inner clamp fixing member matched with the fixed guide groove is also arranged; when the bottom die recovery type steel bar truss floor support plate clamp structure is closed, the fixed guide grooves at the top ends of the two inner clamps are fixedly connected through the inner clamp fixing members.
As preferable: and a connecting hole plugging member is arranged between the clamp structure of the bottom die recovery type reinforced bar truss floor support plate and the gap of the bottom die.
As preferable: the bottoms of the left side and the right side of the middle square leveling-free structure are respectively provided with a groove in the front-back direction, and the length directions of the grooves and the guide rails are the same; and a plurality of leveling bolts are arranged in each groove, the middle square leveling-free structure is supported on the guide rail through the leveling bolts, the top of the middle square leveling-free structure is provided with horizontal bubbles, and the depth of each groove is larger than the sum of the heights of the leveling bolts and the guide rail.
As preferable: the middle square leveling-free structure and the square standard section are respectively provided with a grouting hole, a grouting outlet and an annular lifting hook; an angle sensor is arranged on the horizontal baffle; the middle square leveling-free structure and the square standard section are internally provided with hollow structures for storing concrete slurry, the tops of the hollow structures are connected with grouting holes, the inner sides of the bottoms of the hollow structures are provided with propellers, and the bottoms of the hollow structures are connected with slurry outlets.
The novel construction method of the steel structure floor support plate comprises the following steps:
step one, manufacturing a steel bar truss of a floor support plate, fully paving the steel bar truss on a steel beam, welding by using bolts, binding steel bars of the floor support plate, arranging connecting steel bars, manufacturing a bottom die, and forming holes on the bottom die;
step two, assembling a bottom die recovery type steel bar truss floor support plate clamp structure, wherein an inner clamp part extends into an opening on the bottom die from bottom to top, one ends of two inner clamps are opened by using handles of an outer clamp, connecting steel bars are clamped by connecting steel bar connecting holes on the two inner clamps, and then the two inner clamps are closed and fixed by using the handles of the outer clamps; installing a connecting hole plugging member at a gap between the spliced bottom die recovery type steel bar truss floor support plate clamp structure and the opening on the bottom die;
step three, arranging a guide rail above a steel bar truss of a floor support plate, installing a leveling-free high-precision cast-in-situ ground one-time pouring molding structure on the guide rail, arranging a horizontal baffle below the guide rail, and adjusting the middle square leveling-free structure to be horizontal through a leveling bolt;
step four, pouring the floor carrier plate through the middle square leveling-free structure and the square standard joint, detecting the levelness of the concrete surface through the horizontal baffle plate, and pulling the middle square leveling-free structure and the square standard joint through the annular lifting hook to finish pouring the concrete of the floor carrier plate;
and fifthly, after the concrete of the floor support plate is solidified, the connecting piece is taken down, and the external clamp and the internal clamp are separated, and then the external clamp and the connecting hole plugging member are recovered.
Preferably, in the second step, after the two inner clamps are closed by the handles of the outer clamps, the fixing members on the two outer clamps are fixedly connected to each other, and the inner clamp fixing members are mounted on the fixing guide grooves of the two inner clamps from above the steel bar truss, so that the inner clamp ends are fixed.
The beneficial effects of the invention are as follows:
1) The invention provides a clamp structure for recovering a reinforced truss floor support plate by a bottom die, wherein the bottom die and steel bars are firmly connected with the bottom die through a detachable clamp, truss steel bars of the recoverable reinforced truss floor support plate are processed in a factory, the advantages of good control of the distance between the steel bars of the traditional reinforced truss floor support plate and the thickness of a steel bar protection layer are reserved, the site construction operation is simple and easy, and only the bottom die and the truss steel bars are connected together through a connecting structure; the bottom die can be recycled after pouring of the floor support plate is completed, and waste of materials is reduced.
2) According to the clamp structure for the bottom die recycling type reinforced truss floor support plate, the concrete plugging member is arranged at the connecting hole of the bottom die, so that overflow of concrete in the pouring process is reduced, and environmental pollution caused by construction waste is reduced.
2) When concrete is poured, an auxiliary leveling of a leveling-free high-precision cast-in-situ ground one-time pouring molding structure is applied, the structure is formed by splicing a square middle leveling-free structure and square standard sections, a concrete storage chamber and a screw propeller are arranged in the leveling-free structure, the concrete is not easy to solidify in advance in the construction process, and a matched grouting pipe is directly connected to each component, so that synchronous grouting is realized, and grouting time is shortened.
3) When the included angle between the horizontal baffle and each standard section and the middle square leveling-free component reaches 90 degrees, the horizontal baffle proves that the floor concrete is horizontal, the leveling-free effect is achieved by one-time pouring and forming of the floor concrete, and certain construction steps are reduced under the condition of achieving leveling-free pouring of the floor concrete.
4) The leveling-free high-precision cast-in-situ floor one-step pouring molding structure can be assembled by properly increasing and decreasing standard knots according to the specific length of a floor, so that the turnover rate of the leveling-free structure is greatly improved, and better economic and social benefits are generated when the leveling-free high-precision cast-in-situ floor one-step pouring molding structure is applied to actual construction.
Drawings
Fig. 1 is a schematic structural view of a bottom die recovery type steel bar truss floor support plate clamp after structural installation;
fig. 2 is a schematic diagram of the structure of the bottom die recovery type steel bar truss floor support plate clamp after left and right detachment;
FIG. 3 is a schematic view of a nailer;
FIG. 4 is a schematic diagram of a leveling-free high-precision cast-in-situ floor one-time casting molding structure;
FIG. 5 is a schematic illustration of the mating of leveling bolts, horizontal baffles, and rails;
FIG. 6 is a schematic view of the middle square leveling-free structure mounted on a rail.
Reference numerals illustrate: the device comprises a bottom die 1, an outer clamp 2, an inner clamp 3, a bolt 4, a connecting piece 5, a connecting hole plugging member 6, a fixing member 7, a connecting steel bar connecting hole 8, a fixing guide groove 9, an inner clamp fixing member 10, a middle square leveling-free structure 2-1, a square standard section 2-2, a connecting piece 2-3, a horizontal baffle 2-8, a hinge 2-9, a bolt 2-10, an annular lifting hook 2-11, an angle sensor 2-12, a screw 2-13, a horizontal bubble 2-14, a leveling bolt 2-15, a grouting hole 2-16, a slurry outlet 2-17 and a guide rail 2-18.
Detailed Description
The invention is further described below with reference to examples. The following examples are presented only to aid in the understanding of the invention. It should be noted that it will be apparent to those skilled in the art that modifications can be made to the present invention without departing from the principles of the invention, and such modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Example 1
As an example, as shown in fig. 1 to 6, a novel construction device for a steel structure floor support plate used in a novel construction method for a steel structure floor support plate, comprises: the bottom die 1, the bottom die recovery type steel bar truss floor support plate clamp structure and the leveling-free high-precision cast-in-situ ground one-step pouring molding structure; the bottom die 1 is provided with an opening for the bottom die to recover the steel bar truss floor support plate clamp structure to extend into the upper part of the bottom die and fix the bottom die with the connecting steel bars of the floor support plate steel bar truss.
As shown in fig. 1 and 2, the clamp structure of the bottom die recovery type reinforced truss floor support plate is in a scissor shape and comprises an outer clamp 2, an inner clamp 3, bolts 4, connecting pieces 5 and connecting reinforced bar connecting holes 8; the bottom of the external clamp 2 is in a handle shape, the top of the external clamp is fixedly connected with the internal clamp 3 through a connecting piece 5, the two groups of connected external clamp 2 and internal clamp 3 are connected with each other by taking a bolt 4 as a rotating shaft, and the bolt 4 is arranged on the two external clamps 2; the two inner clamps 3 are respectively provided with a connecting steel bar connecting hole 8, the connecting steel bar connecting holes 8 extend from the center of the inner clamps 3 to one side of the inner clamps 3, and the extending directions of the connecting steel bar connecting holes 8 on the two inner clamps 3 are opposite; when the bottom die recovery type steel bar truss floor support plate clamp structure is closed, the connecting steel bar connecting holes 8 on the two inner clamps 3 are partially overlapped to form circular through holes, and the diameters of the circular through holes are matched with the diameters of the connecting steel bars of the floor support plate steel bar truss.
The two outer clamps 2 are respectively provided with a fixing member 7, and when the clamp structure of the bottom die recovery type reinforced truss floor support plate is closed, the fixing members 7 on the two outer clamps 2 are fixedly connected with each other; the end of the inner clamp 3 far away from the outer clamp 2 is provided with a fixed guide groove 9, and an inner clamp fixed member 10 matched with the fixed guide groove 9 is also arranged; when the bottom die recovery type steel bar truss floor carrier plate clamp structure is closed, the fixed guide grooves 9 at the top ends of the two inner clamps 3 are fixedly connected through the inner clamp fixing members 10, the inner clamp fixing members 10 are steel wire ropes and are fixed on the periphery of the fixed guide grooves 9, the two inner clamps 3 are fixed, and the steel bar truss is prevented from moving when the floor carrier plate is poured.
As shown in fig. 4 to 6, the leveling-free high-precision cast-in-situ ground one-time pouring molding structure comprises a middle square leveling-free structure 2-1 and a guide rail 2-18, wherein the middle square leveling-free structure 2-1 moves along the guide rail 2-18, grooves in the front-back direction are respectively formed in the bottoms of the left side and the right side of the middle square leveling-free structure 2-1, and the grooves are identical to the guide rail 2-18 in the length direction; two leveling bolts 2-15 are arranged in each groove, the middle square leveling-free structure 2-1 is supported on the guide rail 2-18 through the leveling bolts 2-15, the top of the middle square leveling-free structure 2-1 is provided with horizontal bubbles 2-14, the leveling bolts 2-15 can be adjusted according to the state of the horizontal bubbles 2-14, the middle square leveling-free structure 2-1 is kept horizontal, and the error of the floor levelness is reduced; the depth of the groove is larger than the sum of the heights of the leveling bolts 2-15 and the guide rails 2-18, and the width of the groove is also slightly larger than the guide rails 2-18, so that the middle square leveling-free structure 2-1 can move on the guide rails 2-18.
The two sides of the middle square leveling-free structure 2-1 are fixedly connected with square standard sections 2-2 through connecting pieces 2-3, and the number of the square standard sections 2-2 can be increased or decreased according to the width requirement of a poured floor and are fixed through the connecting pieces 2-3. The connecting piece 2-3 penetrates through a preset hole site of the middle square leveling-free structure 2-1 and is fixed on the middle square leveling-free structure 2-1, and then the preset hole site of the square standard section 2-2 is aligned with and inserted into the connecting piece on the middle square leveling-free structure 2-1, so that the middle square leveling-free structure 2-1 and the square standard section 2-2 are connected in pairs, and a complete structure is formed.
The rear parts of the bottoms of the middle square leveling-free structure 2-1 and the square standard section 2-2 are connected with a horizontal baffle plate 2-8 through a hinge 2-9 and a bolt 2-10, and the hinge 2-9 can rotate to enable the horizontal baffle plate 2-8 to undulate according to the surface of concrete slurry poured below; the horizontal baffle plate 2-8 is transparent, so that operators can check whether concrete is filled, the horizontal baffle plate 2-8 is provided with an angle sensor 2-12, and when the angle sensor 2-12 displays that the included angle between the horizontal baffle plate 2-8 and the middle square leveling-free structure 2-1 and the square standard section 2-2 is 90 degrees, the concrete slurry level below the horizontal baffle plate 2-8 is described.
The installation position of the horizontal baffle plate 2-8 is lower than the lower surface of the guide rail 2-18, so that the guide rail 2-18 can not interfere with pouring of concrete and can be recycled; the middle square leveling-free structure 2-1 and the square standard section 2-2 are respectively provided with a grouting hole 2-16, a grouting outlet 2-17 and an annular lifting hook 2-11; hollow structures for storing concrete slurry are arranged in the middle square leveling-free structure 2-1 and the square standard section 2-2, so that sundries are prevented from polluting concrete; the top of the hollow structure is connected with a grouting hole 2-16, and a propeller 2-13 is arranged at the center point of the inner side of the bottom of the hollow structure, so that concrete slurry is not solidified in advance, and material waste is avoided; the bottom of the hollow structure is connected with a slurry outlet 2-17.
The annular lifting hook 2-11 is arranged at the center of the front of the middle square leveling-free structure 2-1 and the square standard section 2-2, and an operator can pass through the annular lifting hook 2-11 through a rope, so that the middle square leveling-free structure 2-1 and the square standard section 2-2 can be pulled conveniently, and the integral pouring of the floor carrier plate is realized.
The bottom die 1 is arranged below the pouring position of the floor support plate, and an internal clamp 3 of the clamp structure of the floor support plate of the bottom die recovery type reinforced truss extends into the upper side of the bottom die 1 from the lower side and is fixedly connected with the connecting reinforced bars of the floor support plate; and a connecting hole plugging member 6 is arranged between the clamp structure of the bottom die recovery type reinforced truss floor support plate and the open hole gap of the bottom die 1, the connecting hole plugging member 6 is made of rubber materials, and the size of the connecting hole plugging member is slightly larger than that of the open hole of the bottom die 1, so that the plugging and fixing of concrete are realized. The leveling-free high-precision cast-in-situ ground one-time casting molding structure is arranged above the casting position of the floor support plate.
Example two
As another embodiment, the method for performing the novel construction of the steel structure floor support plate by using the novel construction device of the steel structure floor support plate described in the first embodiment comprises the following steps:
step one, manufacturing a steel bar truss of a floor support plate. The steel bar truss template is a combined template which is used for processing steel bars in the floor slab into steel bar trusses in factories and connecting the steel bar trusses with the bottom die 1 into a whole. The steel bars form a truss to bear load during construction; in the construction process, the steel bar truss floor support plate is fully paved on the steel beam and is firmly welded by the bolts shown in fig. 3, so that the steel bar truss floor support plate can be used as a scaffold plate for installers. In the construction process, the construction load on the steel bar truss floor support plate cannot exceed the load of the floor support plate in the design construction stage. And before the steel beams at the lower parts of the corresponding building support plates are completely installed, the construction of the corresponding steel bar truss building support plates cannot be carried out. Fully paving a steel bar truss on a steel beam, welding by using bolts, binding building support plate steel bars, arranging connecting steel bars, manufacturing a bottom die 1, and forming holes on the bottom die 1; the bottom mould 1 is used for supporting wet concrete, so that the technology can save the work and cost of mould supporting.
Step two, assembling a bottom die recovery type steel bar truss floor support plate clamp structure, wherein a bolt 4 is matched with a nut to connect and fix the left external clamp 2 and the right external clamp 2; the inner clamps 3 are partially extended into the holes on the bottom die 1 from bottom to top, one ends of the two inner clamps 3 are opened by using the handles of the outer clamps 2, after connecting steel bars are clamped by connecting steel bar connecting holes 8 on the two inner clamps 3, the two inner clamps 3 are closed by using the handles of the outer clamps 2, fixing members 7 on the two outer clamps 2 are fixedly connected with each other, and inner clamp fixing members 10 are arranged on fixing guide grooves 9 of the two inner clamps 3 from above a steel bar truss to fix the ends of the inner clamps 3; the reinforced concrete becomes a whole during pouring; installing a connecting hole plugging member 6 at a gap between the spliced bottom die recovery type steel bar truss floor support plate clamp structure and the opening on the bottom die 1;
step three, according to the height required by the floor support plate surface, arranging a guide rail 2-18 above a steel bar truss of the floor support plate, installing a leveling-free high-precision cast-in-situ ground one-time pouring molding structure on the guide rail 2-18, arranging a horizontal baffle plate 2-8 below the guide rail 2-18, and adjusting the middle square leveling-free structure 2-1 to be horizontal through a leveling bolt 2-15; and meanwhile, whether the distance between the leveling baffle and the bottom die 1 is the height required by the floor support plate surface is detected, and if deviation exists, fine adjustment can be performed through the leveling bolts 15.
Pouring the floor carrier plate through the middle square leveling-free structure 2-1 and the square standard joint 2-2, detecting the levelness of the concrete surface through the horizontal baffle plate 2-8, and pulling the middle square leveling-free structure 2-1 and the square standard joint 2-2 through the annular lifting hook 2-11 when the rear edge of the horizontal baffle plate is filled with concrete, so as to finish pouring the concrete of the floor carrier plate;
and fifthly, after the concrete of the floor support plate is solidified, the connecting piece 5 is taken down, the external clamp 2 is separated from the internal clamp 3, and then the external clamp 2 and the connecting hole plugging member 6 are recovered.
Example III
As another embodiment, in the step one of the second embodiment:
the method comprises the following steps: before entering, the variety, specification and performance of the product should meet the design requirements and the regulations of the national current relevant standards, and the supplier should provide quality certificates and delivery qualification certificates when supplying goods. The inspection and the construction of the incoming bottom die 1 are strictly carried out according to design and steel structure engineering construction quality inspection and acceptance Specification GB50205-2001, the variety, specification and size of the incoming bottom die 1 are inspected, and quality qualification documents, inspection reports and the like of products are carefully inspected.
The bottom die 1 should be packed and entered in layers, each bundle of bottom die 1 should be placed near the yard under the position of the floor where the bundle is to be installed, and timely protection measures are taken to prevent damage, deformation and greasy dirt pollution, and meanwhile, all matched components such as a baffle plate, a trimming plate and the like of the layer of bottom die 1 should be entered in advance.
The bottom die 1 is transported to the site, and the unloading and stacking are orderly. The steel bar truss plate stacking place is arranged in a ground safety zone which is pollution-free, does not obstruct traffic and is not impacted by heavy objects. The steel bar truss plates are stacked by adopting sleepers to be overhead so as to prevent water from soaking on the ground, and the sleepers are inclined to prevent water from flowing on the upper surface, so that the stacking is not easy to be excessively high. After the materials are proportioned on the ground, the plates are respectively hung into each construction joint, and the steel bar truss template layout and the package mark should be closely paid attention to during the lifting, so that the phenomenon of staggered lifting and placing positions is avoided.
The steel bar truss plate is accurately machined according to the deepening diagram when being machined in a manufacturing plant, and only a positioning datum line of the bottom die 1 in the installation process is needed to be lofted when in field construction.
And paving the bottom die 1, binding plate bottom steel bars and part of additional steel bars according to the template plane layout diagram. The bottom die 1 is cut at the position with the changing plane shape, and the end support steel bars are mounted after repair welding.
When the steel bar truss template spans the cross beam and the steel bar truss web member feet are not supported on the cross beam, support steel bars should be repair welded at the cross beam. The length of the steel bar truss template extending into the beam edge must meet the design requirements.
After the steel bar truss template is paved, finished product protection is performed, and surface depression is avoided; the construction process is strictly carried out in sequence, quality inspection is gradually carried out, and after installation is finished, concealment, handover and acceptance inspection are carried out.
The steel bar truss template is preferably cut by plasma or mechanical cutting, and flame cutting is not preferably adopted, so that the galvanized bottom plate is prevented from being damaged.
Before the bottom die 1 is paved, impurities, greasy dirt, rainwater, frost snow and the like on the top surface of the steel beam must be carefully removed. During operation, safety is paid attention to, the safety belt is hung on the safety rope, and the safety rope is removed after the corresponding safety facilities are removed.
And paving the steel bar truss templates from the end head to the other end, and finally treating the corner parts. The bottom die 1 is provided with connecting holes which are paved along with the installation and construction sequence of the main body structure. The bottom die 1 is preferably installed after the steel column and the matched steel beam are installed. Aligning the reference lines, mounting a first plate, and sequentially mounting other plates. The boards are connected in a buckling mode, and the drag hook is tightly connected. When the bottom die 1 is paved, the plane is ensured to be straight, and the concave is not allowed to be generated. Sealing plate, side form reinforcement ending are according to the construction progress requirement.
When in lap joint, the length of the steel bar truss floor support plate extending into the beam edge must meet the design requirement, namely the lap joint length of the floor support plate in the length direction, namely the distance between the edge of the upper flange of the steel beam and the end vertical support steel bar is not suitable to be smaller than a larger value of 5d and 50mm, and d is the diameter of the lower chord steel bar of the steel bar truss.
The lap joint length of the bottom die and the steel beam in the width direction of the die plate is not suitable to be less than 30mm, so that slurry leakage is avoided when concrete is poured. The bottom die side of the steel bar truss floor support plate adopts a buckling mode, the side edge of the plate is provided with a connecting drag hook, and the lap joint width is not less than 10mm.
When the support angle steel is arranged at the position of the steel column, the L50X5 angle steel is welded at the periphery of the column, and when the support angle steel exists, the peripheral angle steel is not required to be welded. The main structure part adopts a steel bar truss floor supporting plate, and a reliable temporary support is arranged in the midspan of the floor supporting plate in the direction perpendicular to the steel bar truss for the floor area which does not meet the maximum unsupported span of the construction stage of the steel bar truss floor supporting plate.
And the upper part of the steel beam is provided with a peg, and the steel beam is welded by penetrating through the floor plate. The stud construction process mainly comprises marking positioning, cleaning welding area, test welding and welding, in particular
Scribing and positioning, and tool: steel plate ruler, scriber, sample punch and hammer. The operation is as follows: and drawing the positions of the welding nails on the component by using a steel plate ruler and a drawing needle according to the positions and the intervals required by design, and punching sample holes at the positions of the welding nails. The requirements are: meets engineering design requirements, and allows deviation of +/-1 mm.
Cleaning a welding area: and (3) polishing the coating of the welding part of the component by using an angle grinder, and cleaning scrap iron residues by using a steel wire brush. The requirements are: the surface of the welded steel component is not allowed to have paint, other coatings, water, grease, and other stains that affect the quality of the weld.
And (3) test welding: before the welding is performed formally, a welding nail of each specification of each project is required to be welded, the welding nail is bent for 30 degrees by knocking by a hammer or pressing by a sleeve, a bending test is performed, and whether the quality requirement is met is checked; if the requirements cannot be met, the construction process is modified, and the process parameters are adjusted to try again until the requirements are met. When the sleeve is used for testing, the distance between the lower end of the sleeve and the upper end of the welding meat is not less than 1d.
Welding: placing the welding nails in a clamping device of a welding gun, placing a protective porcelain ring with a corresponding diameter on a base material, and inserting the welding nails into the porcelain ring and contacting with the base material; pressing a power switch, automatically lifting the welding nails, and exciting an electric arc; the welding current is increased, so that the end part of the welding nail and the local surface of the base metal are melted; after the set arc burning time is reached, automatically pressing the welding nails into the base material; cutting off the power supply, solidifying the molten metal, and keeping the welding gun motionless; and cooling the welding seam, forming uniform annular weld seam excess height on the surface of the end part of the welding nail, and then breaking and removing the ceramic ring to finish welding.
According to specific conditions, the key points and the difficult points of control are determined, corresponding measures are formulated, and the requirements of the shock-resistant structure, such as the overlap joint and anchoring length of the reinforcing steel bars, the joint position, the straight length of the hooks and the like, are particularly important.
The steel bar processing and proportioning table is compiled according to each layer of engineering parts, running water sections and the like, the grade, diameter, blanking length, bending forming size, number and the like of the steel bars are respectively listed, each steel bar is numbered, and the processing, supplying and field construction are corresponding to the numbers.
Because the lower iron steel bars of the floor slab, which are arranged in the direction perpendicular to the steel bar truss template, are arranged above the lower chord steel bars of the steel bar truss template, the thickness of the protective layer is considered in the design of the steel bar truss template, so that a protective layer cushion block is not required to be arranged; the iron distribution steel bars on the floor slab are arranged on the lower surface of the upper chord steel bars in the direction vertical to the steel bar truss template, and the thickness of the steel bar protection layer can be controlled by a diagonal pull-through line method in the concrete pouring process.
The construction sequence of the additional steel bars is as follows: setting lower additional steel bars, setting hole edge additional steel bars, setting upper additional steel bars, setting connecting steel bars and setting support hogging moment steel bars.
The opening of the steel bar truss floor support plate is approved by design, and paying-off positioning is performed on site; hole edge reinforcing ribs are required to be arranged according to design requirements, and when a large concentrated load exists on the hole edge or the length of the hole edge is larger than 1000 mm, hole edge beams are required to be arranged. When the hole side length is smaller than 1000 mm, hole side reinforcing ribs are arranged according to design requirements and are arranged below the steel bar truss gluten. When the floor slab concrete reaches 75% of the design strength, the steel bars and the steel plates of the steel bar truss floor support plate can be cut off. The bottom die edge is prevented from being separated from the poured concrete when the bottom die is cut, the galvanized steel plate of the bottom die is cut by plasma when the bottom die is cut, and flame cutting is not needed.
In the fourth step:
the concrete pouring process flow comprises the following steps: cleaning a construction joint, pumping by concrete, pouring, leveling by concrete and curing by concrete.
Before pouring concrete, performing construction inspection, and finishing installation of the steel bar truss floor support plate and other projects and checking acceptance; sundries on the floor support plate, including ceramic rings, dust, grease and the like on the bolts, must be removed. Comprising the following steps:
whether the external dimension of the steel bar truss floor support plate meets the requirement or not; whether the model of the steel bar truss floor support plate of each construction area is consistent with the drawing; whether the lap joint length of the steel bar truss floor support plate on the beam in the length direction and the width direction of the plate at the paving starting point and the breaking point meets the requirement or not; whether the vertical ribs of the support at the end part of the plate, the galvanized bottom die plate edges and the side dies are fixed firmly with the steel girder by electric welding or not; the presence of a slurry leakage-free part is ensured at the plate edge and the special-shaped part or the position after cutting; whether the arrangement of the column side supporting angle steel meets the design requirement or not; whether the position of the reserved hole is within the allowable deviation range or not; whether the temporary support is arranged in place according to the design requirement; checking whether the connection of the pull-connection hooks on the side edges of the steel bar truss floor support plate is tight. The construction process is strictly carried out in sequence, quality inspection is gradually carried out, and after installation is finished, concealment, handover and acceptance inspection are carried out.
When the design requires temporary support at the construction stage. Temporary supports are arranged at corresponding positions according to design requirements. When the temporary support is arranged, the floor slab is smaller than 5 m, the floor slab can be detachably supported when the strength of the concrete reaches more than 75% of the design strength, and the floor slab is larger than 5 m, and the floor slab can be detachably supported when the strength of the concrete reaches the design strength. The temporary support cannot adopt isolated point support, strip-shaped horizontal supports such as timber, steel plates and the like are arranged, and the width of the contact surface of the strip-shaped horizontal support and the floor support plate is not smaller than 100 mm.
When the temporary support is arranged, the temporary support cannot be dismantled until the concrete strength of the floor is less than 75% of the design strength of the floor, wherein the span of the floor is less than 8 meters; floor slab with span more than 8 meters can be detached and supported after the strength of the concrete reaches 100% of the design strength; for overhanging locations, the temporary support should be removable after the concrete reaches 100% of the design strength.
When concrete is poured, the steel bar truss floor support plate cannot be impacted. When pouring concrete, pouring the concrete at the position opposite to the steel beam or the temporary support, wherein the temporary accumulation caused by pouring the concrete in the pouring range or the pouring concrete cannot exceed the span range of the steel beam or the temporary support of each 1/6 plate, and the concrete should be rapidly spread out to the periphery so as to avoid overhigh accumulation; and (5) tightly pouring concrete in the span of the steel bar truss floor support plate. The pumping concrete pipe support should be supported on the steel beam.
Before the concrete strength reaches 75% of the design strength, no other load must be added to the floor.
When the construction joint is required to be left, impurities in the template are removed by an air compressor before concrete pouring. And checking whether the concrete protective layer cushion block is well cushioned. The floor construction joint is remained in the middle third range of the span; the construction joint treatment measures are as follows: all construction joints are separated by adopting a multi-layer plate, before the concrete of the next water flowing section is poured, the construction joints are treated, the edge of the concrete is firstly sprung through, the construction joints are cut by a toothless saw to ensure the straightness of the construction joints, the cutting depth is strictly controlled during cutting, the steel bars are prevented from being touched, the concrete is watered and wetted after the floating slurry layer of the construction joints is removed, and the construction joints are treated by people after the strength of the concrete reaches 1.2 Mp.
Claims (8)
1. Novel construction device of steel construction building carrier plate, its characterized in that includes: the bottom die (1), the bottom die recovery steel bar truss floor support plate clamp structure and the leveling-free high-precision cast-in-situ ground one-step pouring molding structure;
the clamp structure of the bottom die recovery type steel bar truss floor support plate is in a scissor shape and comprises an outer clamp (2), an inner clamp (3), bolts (4), connecting pieces (5) and connecting steel bar connecting holes (8); the bottom of the external clamp (2) is in a handle shape, the top of the external clamp is fixedly connected with the internal clamp (3) through a connecting piece (5), the two groups of connected external clamps (2) and the internal clamp (3) are connected with each other by taking a bolt (4) as a rotating shaft, and the bolt (4) is arranged on the two external clamps (2); connecting steel bar connecting holes (8) are formed in the two inner clamps (3), the connecting steel bar connecting holes (8) extend from the center of the inner clamps (3) to one side of the inner clamps (3), and the extending directions of the connecting steel bar connecting holes (8) in the two inner clamps (3) are opposite;
the leveling-free high-precision cast-in-situ ground one-time pouring molding structure comprises a middle square leveling-free structure (2-1) and a guide rail (2-18), wherein the middle square leveling-free structure (2-1) moves along the guide rail (2-18), square standard sections (2-2) are arranged on two sides of the middle square leveling-free structure (2-1), the bottoms rear parts of the middle square leveling-free structure (2-1) and the square standard sections (2-2) are connected with horizontal baffle plates (2-8) through hinges (2-9), and the installation positions of the horizontal baffle plates (2-8) are lower than the lower surfaces of the guide rail (2-18);
the bottom die (1) is arranged below the pouring position of the floor support plate, and an inner clamp (3) of the clamp structure of the floor support plate of the bottom die recovery type reinforced bar truss extends into the upper part of the bottom die (1) from the lower part and is fixedly connected with the connecting reinforced bars of the floor support plate; the leveling-free high-precision cast-in-situ ground one-time casting molding structure is arranged above the casting position of the floor support plate.
2. The novel construction device for the steel structure floor support plate according to claim 1, wherein: when the bottom die recovery type steel bar truss floor support plate clamp structure is closed, connecting steel bar connecting holes (8) on the two inner clamps (3) are partially overlapped to form circular through holes, and the diameters of the circular through holes are matched with the diameters of connecting steel bars of the floor support plate steel bar truss.
3. The novel construction device for the steel structure floor support plate according to claim 1, wherein: the two outer clamps (2) are provided with fixing members (7), and when the clamp structure of the bottom die recovery type steel bar truss floor support plate is closed, the fixing members (7) on the two outer clamps (2) are fixedly connected with each other; one end of the inner clamp (3) far away from the outer clamp (2) is provided with a fixed guide groove (9), and an inner clamp fixed member (10) matched with the fixed guide groove (9) is also arranged; when the bottom die recovery type steel bar truss floor support plate clamp structure is closed, the fixing guide grooves (9) at the top ends of the two inner clamps (3) are fixedly connected through the inner clamp fixing members (10).
4. The novel construction device for the steel structure floor support plate according to claim 1, wherein: a connecting hole plugging member (6) is arranged between the clamp structure of the bottom die recovery type reinforced bar truss floor support plate and the gap of the bottom die (1).
5. The novel construction device for the steel structure floor support plate according to claim 1, wherein: the bottoms of the left side and the right side of the middle square leveling-free structure (2-1) are respectively provided with a groove in the front-back direction, and the length directions of the grooves and the guide rails (2-18) are the same; each groove is internally provided with a plurality of leveling bolts (2-15), the middle square leveling-free structure (2-1) is supported on the guide rail (2-18) through the leveling bolts (2-15), the top of the middle square leveling-free structure (2-1) is provided with horizontal bubbles (2-14), and the depth of the groove is larger than the sum of the heights of the leveling bolts (2-15) and the guide rail (2-18).
6. The novel construction device for the steel structure floor support plate according to claim 1, wherein: the middle square leveling-free structure (2-1) and the square standard section (2-2) are respectively provided with a grouting hole (2-16), a grouting outlet (2-17) and an annular lifting hook (2-11); an angle sensor (2-12) is arranged on the horizontal baffle (2-8); hollow structures for storing concrete slurry are arranged in the middle square leveling-free structure (2-1) and the square standard section (2-2), grouting holes (2-16) are formed in the tops of the hollow structures, propellers (2-13) are arranged on the inner sides of the bottoms of the hollow structures, and slurry outlets (2-17) are formed in the bottoms of the hollow structures.
7. A construction method of a novel construction device for a steel structure floor support plate as claimed in claims 1 to 6, comprising the steps of:
step one, manufacturing a steel bar truss of a floor support plate, fully paving the steel bar truss on a steel beam, welding by using bolts, binding steel bars of the floor support plate, arranging connecting steel bars, manufacturing a bottom die (1), and forming holes on the bottom die (1);
step two, assembling a bottom die recovery type steel bar truss floor support plate clamp structure, wherein part of an inner clamp (3) stretches into an opening on a bottom die (1) from bottom to top, one ends of the two inner clamps (3) are opened by using handles of an outer clamp (2), after connecting steel bars are clamped by connecting steel bar connecting holes (8) on the two inner clamps (3), the two inner clamps (3) are closed by using the handles of the outer clamp (2), and the two inner clamps are fixed; installing a connecting hole plugging member (6) at a gap between the spliced bottom die recovery type steel bar truss floor support plate clamp structure and the opening on the bottom die (1);
step three, arranging a guide rail (2-18) above a steel bar truss of a floor support plate, installing a leveling-free high-precision cast-in-situ ground one-time pouring molding structure on the guide rail (2-18), arranging a horizontal baffle (2-8) below the guide rail (2-18), and adjusting the middle square leveling-free structure (2-1) to be horizontal through a leveling bolt (2-15);
step four, pouring a floor carrier plate through the middle square leveling-free structure (2-1) and the square standard joint (2-2), detecting the levelness of the concrete surface through the horizontal baffle plate (2-8), and pulling the middle square leveling-free structure (2-1) and the square standard joint (2-2) through the annular lifting hook (2-11) to finish pouring the concrete of the floor carrier plate;
and fifthly, after the concrete of the floor support plate is solidified, the connecting piece (5) is taken down, and the external clamp (2) and the internal clamp (3) are separated, and then the external clamp (2) and the connecting hole plugging member (6) are recovered.
8. The construction method of the novel construction device for the steel structure floor support plate according to claim 7, wherein in the second step, after the two inner clamps (3) are closed by the handles of the outer clamps (2), fixing members (7) on the two outer clamps (2) are fixedly connected with each other, and the inner clamp fixing members (10) are mounted on fixing guide grooves (9) of the two inner clamps (3) from above the steel bar truss, and fixing of the ends of the inner clamps (3) is performed.
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| CN202310439593.0A CN116446581A (en) | 2023-04-23 | 2023-04-23 | Novel construction method of steel structure floor support plate |
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| CN202310439593.0A CN116446581A (en) | 2023-04-23 | 2023-04-23 | Novel construction method of steel structure floor support plate |
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