CN116927404A - Construction method for integrally assembled floor support plate truss with detachable bottom die - Google Patents
Construction method for integrally assembled floor support plate truss with detachable bottom die Download PDFInfo
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- CN116927404A CN116927404A CN202310696569.5A CN202310696569A CN116927404A CN 116927404 A CN116927404 A CN 116927404A CN 202310696569 A CN202310696569 A CN 202310696569A CN 116927404 A CN116927404 A CN 116927404A
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- 238000010276 construction Methods 0.000 title claims abstract description 71
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 291
- 239000010959 steel Substances 0.000 claims abstract description 291
- 238000000034 method Methods 0.000 claims abstract description 35
- 230000008569 process Effects 0.000 claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 238000009415 formwork Methods 0.000 claims description 23
- 238000013461 design Methods 0.000 claims description 22
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 19
- 229910052782 aluminium Inorganic materials 0.000 claims description 19
- 238000003466 welding Methods 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 7
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 6
- 239000008397 galvanized steel Substances 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 4
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 4
- 241001330002 Bambuseae Species 0.000 claims description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 4
- 239000011425 bamboo Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 4
- 238000000638 solvent extraction Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 abstract 1
- 239000011120 plywood Substances 0.000 description 5
- 238000011065 in-situ storage Methods 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
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- 238000007689 inspection Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- LNSPFAOULBTYBI-UHFFFAOYSA-N [O].C#C Chemical group [O].C#C LNSPFAOULBTYBI-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
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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
- E04B5/48—Special adaptations of floors for incorporating ducts, e.g. for heating or ventilating
-
- 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
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
-
- 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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The application provides a construction method of a bottom die detachable integrally assembled floor support plate truss, which combines the technical characteristics of the bottom die detachable assembled floor support plate, and provides a detachable bottom die floor support plate construction process: machining and assembling a steel bar truss floor support plate, installing products, installing and fixing side templates, installing additional ribs and pipelines, pouring concrete and removing templates. Compared with the traditional construction concrete floor slab, the novel building product is composed of the steel bar trusses and the floor support plates, the steel bars in the floor slab are intensively processed into the steel bar trusses in factories, and the steel bar trusses and the bottom die are connected into a whole to form a combined template.
Description
Technical Field
The application relates to the technical field of construction engineering, in particular to a construction method for integrally assembling a floor support plate truss with a detachable bottom die.
Background
Along with the continuous development of the steel structure, the construction speed of the traditional cast-in-situ slab of the bracket cannot keep up with the construction speed of the steel column and the steel beam, and meanwhile, because of the construction of the traditional cast-in-situ slab, a large number of templates and scaffolds are required, which has great deviation from the field construction management requirement of the steel structure and is not matched with the construction process.
The steel bar truss floor support plate has the advantages of energy conservation, environmental protection, rapid construction, flat plate bottom and the like, so that the steel bar truss floor support plate is widely applied to constructional engineering, but in the traditional floor support plate truss construction process, the floor support plate bottom die is not detachable, so that the bottom die is not reusable.
Disclosure of Invention
In view of the above, the main purpose of the application is to solve the technical problem that the bottom die of the floor support plate cannot be reused because the bottom die of the floor support plate is not detachable in the traditional floor support plate truss construction process.
The application provides a construction method of a floor support plate truss with a detachable bottom die, which comprises the following steps:
step 1, construction preparation: the bottom die of the steel bar truss floor support plate adopts a bamboo glue plate or a wood glue plate with the thickness not less than 15mm, the bending strength design value of the bottom die is not less than 15N/mm, and the side die plates adopt galvanized steel plates with the thickness of 2 mm;
step 2, building carrier plate assembly: an assembly workbench is arranged, the workbench is fixed at a preset position of a site, 3 groups of steel bar trusses are placed on the installation workbench at equal intervals in parallel, and the steel bar trusses are connected with a bottom die of a steel bar truss floor support plate in a connecting mode of hook connection, bolt connection and the like;
step 3, construction paying-off: ejecting control lines of the steel bar truss floor carrier plates according to the central lines of the beams and the control lines of the steel bar truss floor carrier plate layout, and ejecting position points of the pegs on the specific steel beams according to the position diagrams of the pegs;
step 4, hoisting the floor support plate;
step 5, mounting a floor support plate: the floor carrier plate is placed in the following order: paving each layer of steel bar truss template according to the initial position of the construction drawing, paving one side of each layer of steel bar truss template in sequence, and finally treating corner positions; after the floor carrier plates are paved, aluminum blind rivet stitching is carried out on the lap joint parts between the plates, the aluminum blind rivet spacing is 200mm, and the specification of the aluminum blind rivets is phi 5x10; after the steel bar truss floor support plate is in place, the vertical steel bars at the end parts of the steel bar truss floor support plate are firmly spot-welded with the steel beams, and the transverse steel bars are in butt welding connection; binding additional steel bars after a certain area of the steel bar truss floor support plate is paved;
step 6, pipeline laying: arranging floor slab support connecting steel bars, additional steel bars and distributed steel bars, and binding and connecting with a steel bar truss;
arranging hole edge reinforcing ribs and side molds at reserved holes of the steel bar truss floor support plates, and cutting the non-detachable bottom plate and the hole opening steel bars after the concrete reaches the design strength;
when the concentrated load of the hole is larger than the preset load or the hole side length is larger than 900, arranging a hole side beam;
pipeline is laid in the plate, rigid pipeline is adopted when the plate is worn forward, and flexible material is adopted when the plate is worn obliquely; adopting a pipeline with smaller diameter, and dispersing and perforating for pre-burying;
the embedded box body is fixed on the bottom plate, and when the bottom plate is not detachable, a round hole with the diameter not more than 30m is formed in the position of the box body on the bottom plate;
step 7, side die installation: in the steel structure engineering, after each steel bar truss floor support plate is paved and adjusted in place, the following measures are taken to ensure that the bottom plate and the steel bar truss are connected with the wall, the column and the Liang Laogu:
the support length of the non-detachable steel bar truss floor support plate in the length direction is not less than the maximum value of 5d and 50mm, the support length is the distance between the edge of the upper flange of the steel beam and the end vertical support steel bar, and d is the diameter of the lower chord steel bar of the steel bar truss;
the lap joint length of the bottom plate and the steel beam in the width direction of the template is not less than 30mm;
the detachable steel bar truss floor support plate adopts a mode of edge banding, the edge banding is fixed with the bottom plate by aluminum blind rivets, and the edge banding is fixed with the supporting angle steel or the steel beam by spot welding;
pre-welding supporting angle steel on the steel column when the steel bar truss floor support plate at the steel column is paved, cutting off a bottom plate of a collision part with the steel column, and welding the upper chord steel bar and the lower chord steel bar with the steel column;
step 8, pouring concrete;
step 9, removing the template: the formwork is removed by adopting an early-dismantling scheme, when the concrete strength of the floor reaches about 40% -50%, a large-area formwork without a supporting part is removed firstly, the formwork with a temporary supporting part is reserved, after the concrete strength reaches a threshold value, the formwork is removed again when the temporary support is removed, the transverse distance between the temporary support vertical rods is 900mm, the longitudinal distance is 1200mm, and the formwork is arranged at the vertical rod supporting position singly, wherein the width of the formwork is 120-150 mm;
and (3) hook connection: firstly, loosening the connecting piece and the web member of the steel bar truss, and removing the bottom plate and the connecting piece of the steel bar truss to finish the removal of the bottom plate;
and (3) bolt connection: firstly, loosening the bearing screw rod and the lifting point nut, taking down the bottom plate and the bearing screw rod, and completing the dismantling of the bottom plate, and for the steel bar truss concrete floor engineering with temporary support, dismantling the temporary support above the concrete strength reaching 75% of the design strength, and taking down the bottom plate at the temporary support position after the support is dismantled.
In some embodiments of the present application, in step 4, the floor support plate lifting includes:
before hoisting, checking whether the steel bar truss template connecting piece is deformed or not, and whether the hooks between the plate and the bottom plate are firmly connected or not;
firstly, testing and hoisting the plates after the floor is proportioned, and hoisting the plates after meeting the requirements;
when in hoisting, hoisting is carried out in sequence according to the layout and the marks of the steel bar truss template, and the steel bar truss template is hoisted to each construction joint in a partitioning and slicing mode;
after the floor supporting plate is hung to the floor to be in place, the floor supporting plate is stably placed and timely installed, and is not stacked in a concentrated mode.
In some embodiments of the application, in step 8, the concreting comprises:
the concrete pump pipe cannot be supported on the bottom plate, the steel bars and the embedded parts of the steel bar truss floor support plate, and the horizontal pump pipe is fixed by adopting a bracket and is provided with anti-sliding measures; the impact force applied to the variable diameter part of the joint of the pump pipe and the towed concrete conveying pump, the turning part of the horizontal pump pipe and the variable vertical pipe of the horizontal pipe is large, the inclined struts are adopted for reinforcement, and the vertical pipe is fixed by adopting a special-purpose cross frame;
when the concrete is poured, constructors and equipment are positioned at the positions of the main beam and the secondary beam, and the concrete cannot be directly impacted or poured on the steel bar truss floor support plate; the concrete stacking height on the reinforced truss floor support plate is strictly controlled in the concrete pouring process, and the smaller of the thickness of the floor slab is not more than 300mm and 2 times;
in the concrete vibrating process, a flat vibrator is adopted for vibrating, an inserted vibrator is not adopted for vibrating, and in the concrete vibrating process, a steel bar truss floor support plate is not contacted;
in the concrete curing process, people or overload is strictly forbidden on the steel bar truss floor support plate.
In some embodiments of the application, after step 5, the system further comprises:
and (3) detail treatment: when the details are processed, the building board is surrounded into a closed circle by the K board at the place with the continuous vertical templates and is used as a connecting component of the vertical templates of the upper layer, the K board is connected with the concrete of the lower layer which is poured by the embedded bolts, and is connected with the wall, the outer templates of the column and the inner templates of the elevator shaft when the upper layer is installed, and the verticality and the flatness of the outer concrete of the two layers are ensured; installing a balcony hanging die, wherein the lower edge of the hanging die plate is padded by a reinforced stirrup, the reinforced stirrup is fixed on a flat plate, the split heads are connected and fastened by iron wires, and if the drop height of two sides of the hanging die plate is large, the split heads are connected with the opposite die plate of the hanging die plate by opposite-pull screws; when the internal corner of the steel bar truss building support plate is disassembled for construction, one end of the steel plate is fixed with the wall, column and beam templates, and the other end of the steel plate is sewn with the side template aluminum blind rivets, and the steel plate is in a proper shape according to the gaps;
before the floor steel bar binding, in order to prevent the whole movement of the steel bar truss floor support plate, the truss end head is fixed on the upper opening of the beam or the wall side template by adopting temporary limit iron nails, 2 iron nails are respectively nailed at four corners of each template to be fixed, and after the floor steel bar binding is finished, the floor support plate and the floor steel bar form a whole, and then the temporary limit iron nails are pulled out.
The application provides a construction method of a bottom die detachable integrally assembled floor support plate truss, which combines the technical characteristics of the bottom die detachable assembled floor support plate, and provides a detachable bottom die floor support plate construction process: compared with the traditional construction concrete floor slab, the novel building product is formed by the steel bar trusses and the floor support plate, the steel bar trusses are intensively processed into the steel bar trusses in factories, and the steel bar trusses and the bottom die are connected into an integrated combined template.
Drawings
FIG. 1 is a flow chart of a method for constructing a truss of a floor support plate with a detachable bottom die integrally assembled according to an embodiment of the application;
fig. 2 is a schematic view of a steel bar truss floor deck according to an embodiment of the present application.
Wherein the above figures include the following reference numerals:
1. winding a steel bar; 2. supporting vertical steel bars; 3. web member reinforcement; 4. lower chord steel bars; 5. a bottom die; 6. supporting horizontal steel bars;
Detailed Description
The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
Referring to fig. 1, a flow chart of a construction method for integrally assembling a truss of a floor support plate with a detachable bottom die is shown.
As shown in fig. 1, the construction method of the truss of the floor support plate with the detachable bottom die integrally assembled specifically comprises the following steps:
and 1, preparing construction.
In the step, a bottom die of the steel bar truss floor support plate adopts a bamboo plywood or a wood plywood with the thickness not less than 15mm, the bending strength design value of the bottom die is not less than 15N/mm, and the side die plate adopts a galvanized steel plate with the thickness of 2 mm;
and 2, assembling the floor support plate.
In the step, an assembly workbench is arranged, the workbench is fixed at a preset position of a site, 3 groups of steel bar trusses are placed on the installation workbench at equal intervals in parallel, and the steel bar trusses are connected with a bottom die of a steel bar truss floor support plate in a connecting mode of hook connection, bolt connection and the like;
and 3, construction paying-off.
In the step, ejecting control lines of the steel bar truss floor carrier plates according to the central line of the beam and the control lines of the steel bar truss floor carrier plate layout, and ejecting position points of the pegs on a specific steel beam according to the position diagram of the pegs;
and 4, hoisting the floor support plate.
In the step, before hoisting, checking whether the steel bar truss template connecting piece is deformed or not and whether the hooks between the plate and the bottom plate are firmly connected or not;
firstly, testing and hoisting the plates after the floor is proportioned, and hoisting the plates after meeting the requirements;
when in hoisting, hoisting is carried out in sequence according to the layout and the marks of the steel bar truss template, and the steel bar truss template is hoisted to each construction joint in a partitioning and slicing mode;
after the floor supporting plate is hung to the floor to be in place, the floor supporting plate is stably placed and timely installed, and is not stacked in a concentrated mode.
And 5, mounting the floor support plate.
In this step, the floor carrier plate placement sequence is: paving each layer of steel bar truss template according to the initial position of the construction drawing, paving one side of each layer of steel bar truss template in sequence, and finally treating corner positions; after the floor carrier plates are paved, aluminum blind rivet stitching is carried out on the lap joint parts between the plates, the aluminum blind rivet spacing is 200mm, and the specification of the aluminum blind rivets is phi 5x10; after the steel bar truss floor support plate is in place, the vertical steel bars at the end parts of the steel bar truss floor support plate are firmly spot-welded with the steel beams, and the transverse steel bars are in butt welding connection; binding additional steel bars after a certain area of the steel bar truss floor support plate is paved;
and 6, laying pipelines.
In the step, arranging floor slab support connecting steel bars, additional steel bars and distributed steel bars, and binding and connecting with a steel bar truss;
arranging hole edge reinforcing ribs and side molds at reserved holes of the steel bar truss floor support plates, and cutting the non-detachable bottom plate and the hole opening steel bars after the concrete reaches the design strength;
when the concentrated load of the hole is larger than the preset load or the hole side length is larger than 900, arranging a hole side beam;
pipeline is laid in the plate, rigid pipeline is adopted when the plate is worn forward, and flexible material is adopted when the plate is worn obliquely; adopting a pipeline with smaller diameter, and dispersing and perforating for pre-burying;
the embedded box body is fixed on the bottom plate, and when the bottom plate is not detachable, a round hole with the diameter not more than 30m is formed in the position of the box body on the bottom plate;
and 7, installing the side die.
In the step, in the steel structure engineering, after each steel bar truss floor carrier plate is paved and adjusted in place, the following measures are taken to ensure that the bottom plate, the steel bar truss are connected with the wall, the column and the Liang Laogu:
the support length of the non-detachable steel bar truss floor support plate in the length direction is not less than the maximum value of 5d and 50mm, the support length is the distance between the edge of the upper flange of the steel beam and the end vertical support steel bar, and d is the diameter of the lower chord steel bar of the steel bar truss;
the lap joint length of the bottom plate and the steel beam in the width direction of the template is not less than 30mm;
the detachable steel bar truss floor support plate adopts a mode of edge banding, the edge banding is fixed with the bottom plate by aluminum blind rivets, and the edge banding is fixed with the supporting angle steel or the steel beam by spot welding;
pre-welding supporting angle steel on the steel column when the steel bar truss floor support plate at the steel column is paved, cutting off a bottom plate of a collision part with the steel column, and welding the upper chord steel bar and the lower chord steel bar with the steel column;
and 8, pouring concrete.
In the step, a concrete pump pipe cannot be supported on a bottom plate of a steel bar truss floor support plate, steel bars and embedded parts, and the horizontal pump pipe is fixed by adopting a bracket and is provided with anti-sliding measures; the impact force applied to the variable diameter part of the joint of the pump pipe and the towed concrete conveying pump, the turning part of the horizontal pump pipe and the variable vertical pipe of the horizontal pipe is large, the inclined struts are adopted for reinforcement, and the vertical pipe is fixed by adopting a special-purpose cross frame;
when the concrete is poured, constructors and equipment are positioned at the positions of the main beam and the secondary beam, and the concrete cannot be directly impacted or poured on the steel bar truss floor support plate; the concrete stacking height on the reinforced truss floor support plate is strictly controlled in the concrete pouring process, and the smaller of the thickness of the floor slab is not more than 300mm and 2 times;
in the concrete vibrating process, a flat vibrator is adopted for vibrating, an inserted vibrator is not adopted for vibrating, and in the concrete vibrating process, a steel bar truss floor support plate is not contacted;
in the concrete curing process, people or overload is strictly forbidden on the steel bar truss floor support plate.
And 9, removing the template.
In this step. The formwork is removed by adopting an early-dismantling scheme, when the concrete strength of the floor reaches about 40% -50%, a large-area formwork without a supporting part is removed firstly, the formwork with a temporary supporting part is reserved, after the concrete strength reaches a threshold value, the formwork is removed again when the temporary support is removed, the transverse distance between the temporary support vertical rods is 900mm, the longitudinal distance is 1200mm, and the formwork is arranged at the vertical rod supporting position singly, wherein the width of the formwork is 120-150 mm;
and (3) hook connection: firstly, loosening the connecting piece and the web member of the steel bar truss, and removing the bottom plate and the connecting piece of the steel bar truss to finish the removal of the bottom plate;
and (3) bolt connection: firstly, loosening the bearing screw rod and the lifting point nut, taking down the bottom plate and the bearing screw rod, and completing the dismantling of the bottom plate, and for the steel bar truss concrete floor engineering with temporary support, dismantling the temporary support above the concrete strength reaching 75% of the design strength, and taking down the bottom plate at the temporary support position after the support is dismantled.
In summary, in the method of the embodiment, the bearing type detachable steel bar truss floor bearing plate is formed by assembling the truss and the wooden bottom die on site by adopting a mechanical connection mode through the special connecting piece, and the truss and the wooden bottom die are respectively processed and produced, and are independently packaged and are convenient to transport. Meanwhile, the bottom die and the connecting piece can be detached and reused, so that the problem that the bottom die of the floor support plate is not detachable in the past is solved. Greatly improves the construction efficiency and saves the construction period for the subsequent construction of projects.
In one embodiment, the construction operation flow of the truss of the bottom die detachable integrally assembled floor support plate is specifically as follows:
1.2.1, preparation of construction:
1 preparation of the technique
1) Project technicians organize all management staff and on-site team members to make technical contact, are carefully familiar with the construction drawings, understand design intent and requirements, and collect doubts and difficulties existing in the construction drawings so as to bring out solutions before construction.
2) Organizing technicians to compile construction schemes and reporting and examining according to programs.
3) And (3) making a use plan of various engineering construction materials and turnover materials according to a construction drawing and a construction scheme so as to purchase the approach according to the schedule.
4) And 3, organizing personnel makes a semi-finished product component approach plan according to the steel bar truss floor carrier plate layout.
2 preparation of materials
Wooden bottom die: the bottom die of the steel bar truss floor support plate adopts a bamboo plywood or a wood plywood with the thickness not less than 15mm, the bottom die is required to meet the design requirement, the bending strength design value is not less than 15N/mm, and the side die plate adopts a galvanized steel plate with the thickness of 2 mm. According to the drawing requirements, the steel bars with corresponding specifications are processed and finished in factories according to truss specifications required by the drawing, and the steel bars can be assembled with a bottom template (plywood) on site or transported to the site after being assembled in factories.
3 building carrier plate assembly
Before the steel bar truss floor support plate is transported, the appearance quality, geometric dimension and appearance quality of connection of the steel bar truss and the bottom die of the entering steel bar truss floor support plate should be checked. Before the steel bar truss floor carrier plate is transported, the appearance quality and geometric dimension of the small holes on the entering steel bar truss, the bottom die, the connecting piece and the template should be checked. And checking whether the appearance quality and the geometric dimension of the entering steel bar truss, the bottom die and the bolts meet the relevant requirements. In the field assembly, an assembly workbench is arranged, and the workbench is fixed at a preset position of the field. 3 groups of steel bar trusses are placed on the installation workbench at equal intervals in parallel, and the steel bar trusses are connected with the bottom die in a connecting mode of hook connection, bolt connection and the like.
1.2.2, construction paying-off:
and ejecting the control line of the steel bar truss floor carrier plate according to the central line of the beam and the control line of the steel bar truss floor carrier plate layout, and ejecting the position points of the pegs on the specific steel beam according to the position diagram of the pegs.
1.2.3, hoisting the floor support plate:
when the steel bar truss floor carrier plate is lifted, the steel bar truss floor carrier plate is lifted lightly and cannot collide, and the steel cable is not required to be used for directly hanging the steel bar truss template by adopting a special hanging bracket to be matched with a soft hanging strip for loading, unloading and lifting. Before lifting, checking whether the steel bar truss template connecting piece is deformed or not and whether the hooks between the plate and the bottom plate are firmly connected or not; the plate is firstly lifted after being prepared on the ground, and can be lifted after meeting the requirements; when lifting, lifting according to the arrangement pattern and the mark of the steel bar truss template in sequence, and lifting to each construction joint in a partition and a slice manner; after the floor supporting plate is hung to the floor to be in place, the floor supporting plate should be placed stably and installed in time and should not be stacked intensively; if the floor support plate is temporarily not paved after being lifted in place, the floor support plate should be reliably fixed, and should not be temporarily fixed at high altitude overnight or must be temporarily fixed overnight.
1.2.4, floor support plate installation:
the floor carrier plate is placed in the following order: paving each layer of steel bar truss template according to the initial position of the construction drawing, sequentially paving one side of each layer of steel bar truss template, and finally treating corner positions; after the floor carrier plates are paved, aluminum blind rivet stitching is carried out on the lap joint parts between the plates, the aluminum blind rivet spacing is 200mm, and the specification of the aluminum blind rivets is phi 5x10; after the steel bar truss floor support plate is in place, the vertical steel bars at the end parts of the steel bar truss floor support plate are firmly spot-welded with the steel beams, and the transverse steel bars are in butt welding connection; after a certain area of the steel bar truss floor support plate is paved, the additional steel bars must be bound in time; meanwhile, temporary supports are arranged according to design requirements, and the stability and reliability of the supports are ensured.
1.2.5, detail treatment:
1, in detail processing, the K plates are used for enclosing the floor plate into a closed circle at the place with the continuous vertical templates and used as a connecting component of the vertical templates of the upper layer. The K plate is connected with the poured next layer of concrete through the embedded bolts, is connected with the upper layer of concrete when the wall, the outer column template and the inner side template of the elevator shaft are installed, and ensures the verticality and the flatness of the two layers of external concrete in connection; and (3) installing a balcony hanging die, and lifting the lower edge of the hanging die plate by using a reinforced stirrup pad. The steel bar stirrup must be fixed on the flat board, and the connection of split heads template is fastened with the iron wire. If the drop heights of the two sides of the hanging template are large, the opposite template can be connected with the hanging template by using opposite screws; when the internal corner of the detachable steel bar truss building support plate is constructed, one end of the steel plate can be fixed with the wall, column and beam templates, and the other end is sewed with the side template aluminum pull rivet, and the steel plate is in a proper shape according to the gap.
2 before the binding of the floor steel bars, in order to prevent the whole movement of the steel bar truss floor support plate, the truss end head should be fixed on the upper opening of the beam or wall side template by adopting temporary limit iron nails, and the four corners of each template are respectively nailed with 2 iron nails for fixing. After the floor steel bars are bound, the floor support plate and the floor steel bars form a whole, and the temporary limiting iron nails can be pulled out.
1.2.6, additional reinforcement engineering and pipeline laying:
and (3) arranging the floor slab support connecting steel bars, the additional steel bars and the distributed steel bars according to design requirements, and binding and connecting with the steel bar truss. Hole edge reinforcing ribs and side molds are arranged at reserved holes of the steel bar truss floor support plate according to design requirements, and the non-detachable bottom plate and the hole reinforcing steel bars can be cut after the concrete reaches the design strength. When the hole has larger concentrated load or the hole side length is greater than 900, the hole side beam is arranged according to the design requirement. The pipeline is laid in the plate, a rigid pipeline can be adopted when the pipeline is worn forward, and flexible materials are adopted when the pipeline is worn obliquely. The pipelines with smaller diameters should be adopted as much as possible, and the perforation is dispersed and pre-buried, so that the intersection of a plurality of pipelines or the bundling perforation on a plate is avoided. The embedded box body should be reliably fixed on the bottom plate, and when the bottom plate is not detachable, a round hole with the diameter not more than 30m can be formed in the box body position on the bottom plate. And the steel bar truss is forbidden to be pulled and cut off at will, and if the steel bar truss is damaged, the steel bar truss is restored by adopting the re-welding connection of the same type of steel bars and the steel bar truss. The floor support plate is cut by adopting mechanical, cold working, air plasma arc and other methods, and the cutting is strictly forbidden by adopting oxygen acetylene flame.
1.2.7, side die installation:
in the steel structure engineering, after each steel bar truss floor support plate is paved and adjusted in place, the following measures are adopted to ensure the bottom plate,
The steel bar truss is connected with the wall, the column and the Liang Laogu: the support length (the distance between the edge of the upper flange of the steel beam and the vertical support steel bars at the end part) of the non-detachable steel bar truss floor support plate in the length direction is not suitable for being smaller than a larger value in 5d (d is the diameter of the lower chord steel bars of the steel bar truss) and 50mm, and the lap joint length of the bottom plate in the width direction of the template and the steel beam is not suitable for being smaller than 30mm; the detachable steel bar truss floor support plate can adopt a mode of edge banding, the edge banding is fixed with the bottom plate by aluminum blind rivets, and the edge banding is fixed with the supporting angle steel or the steel beam by spot welding; when the steel bar truss floor support plate at the steel column is paved, the support angle steel is pre-welded on the steel column, the bottom plate of the collision part with the steel column is cut off, and the upper chord steel bar and the lower chord steel bar are welded with the steel column.
1.2.8, quality inspection and acceptance:
and (3) strictly executing an installation sequence in the construction process, gradually carrying out quality and safety inspection, and after the installation, checking and accepting the constructed truss plates by combining supervision before pouring concrete, wherein the checked and accepted party can allow pouring of the concrete, and checking and accepting records are filled. The examination mainly comprises the following contents: the model of the steel bar truss template at each part; whether the vertical ribs and the plate edges of the support are welded with the steel beam or not; whether the support vertical ribs are firmly connected with the beam column templates or not; whether the truss transverse steel bars are firmly welded with the beam column steel bars or not; the length and arrangement distance of the reinforcing steel bars; checking the welding quality, the number and the spacing of the pegs; checking the connection quality, quantity and spacing of the screws; whether slurry leakage is possible at the edges and the joints; whether the connection between the steel bar truss template and the shear wall is reliable or not; temporary support conditions.
1.2.9, concrete pouring:
the concrete pump pipe is not supported on the bottom plate, the steel bars and the embedded parts of the steel bar truss floor support plate, and the horizontal pump pipe is fixed by adopting a bracket and is provided with anti-sliding measures; and the concrete pump pipes can be arranged, and waste automobile tires can be padded below the pump pipes to protect reinforcing steel bars of the floor support plates. The impact force received by the joint reducing part of the pump pipe and the towed concrete conveying pump, the turning part of the horizontal pump pipe and the vertical pipe of the horizontal pipe is large, the inclined strut is adopted for reinforcement, and the vertical pipe is fixed by adopting a special-purpose cross frame.
2, when the concrete is poured, constructors and equipment are positioned at the positions of the main beam and the secondary beam, and the concrete cannot be directly impacted or poured on the steel bar truss floor support plate; the pile height of concrete on the reinforced truss floor support plate should be strictly controlled in the concrete pouring process, and the pile height should not exceed 300mm and 2 times the smaller thickness of the floor; in the concrete vibrating process, a flat vibrator is adopted for vibrating, and an inserted vibrator is not adopted for vibrating. If the vibrator contacts with the steel bar truss in the concrete pouring and vibrating process, the steel bar truss is forced to vibrate violently, so that the steel bar truss is displaced and even falls off from the bottom connecting piece, and the steel bar truss floor support plate cannot be touched in the concrete vibrating process. In the concrete curing process, people or overload are strictly forbidden on the steel bar truss floor support plate so as to avoid causing concrete cracking. During the concrete curing, the steel bar truss floor support plate should be avoided from being overloaded.
1.2.10, removing the template:
and 1, the formwork is removed by adopting an early-removal scheme, when the concrete strength of the floor reaches about 40% -50%, the large-area formwork without the supporting part is removed firstly, the formwork with the temporary supporting part is reserved, and when the concrete strength reaches the design requirement, the temporary support is removed. The transverse distance between the temporary supporting upright rods is 900mm, and the longitudinal distance is 1200mm. The template is arranged on the upright support position separately, and the width of the template is 120-150 mm.
2 hook connection: the connecting piece and the web member of the steel bar truss are loosened, the bottom plate and the connecting piece of the steel bar truss are taken down, and the bottom plate is removed.
3, bolt connection: the bearing screw rod and the hanging point nut are loosened, the bottom plate and the bearing screw rod are taken down, and the bottom plate is removed. The concrete strength when the bottom plate is dismantled should accord with the design requirement. For a steel bar truss concrete floor project provided with temporary supports, the temporary supports should be removable when the concrete strength reaches more than 75% of the design strength. The bottom plate at the temporary support is taken down after the support is removed, and the bottom plate is required to be stacked neatly after being demolded. The bottom plate, fittings and tools are strictly forbidden to be thrown from high places. Safety measures for preventing the bottom plate from falling randomly should be taken when the bottom plate is removed.
In summary, the method of the embodiment adopts the bearing type detachable steel bar truss floor bearing plate, the truss and the wooden bottom die are assembled on site by adopting a mechanical connection mode through the special connecting piece, the truss and the wooden bottom die are respectively processed and produced, and the truss and the wooden bottom die are independently packaged and are convenient to transport. Meanwhile, the bottom die and the connecting piece can be detached and reused, so that the problem that the bottom die of the floor support plate is not detachable in the past is solved. Greatly improves the construction efficiency and saves the construction period for the subsequent construction of projects.
Economic benefit analysis, taking the project of Guangdong as an example, involved the construction period of the floor support plate calculated as 30 days (as shown in Table 1):
TABLE 1
In one specific application scenario, guangdong is the factory building.
1.1 engineering overview
Comprising two unit projects. PP packaging factory building and PP stereoscopic warehouse. Wherein the installation of the pp packaging factory building steel structure is about 230T, the building area is 5979m < 2 >, and the building height is 10.7m; the PP three-dimensional warehouse steel structure is installed at about 2950T, the building area is 12931m < 2 >, and the building height is 34.9m.
Door-type rigid frames (including all steel structures such as inter-column supports, tie bars, wind-resistant columns and the like and corresponding anti-corrosion and fireproof methods) of three-dimensional libraries and packaging plants, wall surfaces and roof purlins (including all accessories such as braces, supports, purlins and the like, fire-fighting supports and hangers), wall surfaces and roof panels (double-layer profiled steel sheet composite insulation boards, including all relevant contents such as daylighting panels, smoke exhaust windows, air duct openings and fan installation, roof inner and outer drainage gutter, electric lightning protection grounding and the like), and construction drawing design, manufacturing, installation and the like of inner fire-resistant walls. The total amount of steel structure installation is about 3200T.
1.2 construction conditions
The Guangdong project applies the technology, and complicated construction procedures such as formwork supporting, formwork removing and steel bar binding of the traditional cast-in-situ floor slab are omitted.
1.3 engineering evaluation
By adopting the construction method, the construction speed of the floor slab is greatly improved, the construction progress is ensured, and a large amount of template materials and labor cost are saved. The method has guiding and reference significance for other similar project construction, and is also helpful for promoting the popularization and construction of steel structures and building carrier plate assembly type buildings.
In another specific application scenario, zhejiang corporation produces 40000 sets of precision hydraulic components and parts items per year.
2.1 engineering overview
The engineering content is as follows: civil construction, pile foundation civil construction, steel structure, water supply and drainage, electric, fire protection and heating ventilation construction. Building area 27008.5M 2 The method comprises the steps of carrying out a first treatment on the surface of the The building height is 10.45-18.87 m, the number of layers is 1/2/6, the engineering structure is a frame structure, the engineering grade is two-level, and the fire-resistant grade is two-level. The reasonable service life of engineering design is 50 years, and the earthquake-proof fortification intensity is 7 degrees.
2.2 construction conditions
The project adopts a mechanical connection mode to assemble on site through the special connecting piece, the truss and the galvanized steel sheet bottom die are respectively processed and produced, and the truss and the galvanized steel sheet bottom die are independently packaged and are convenient to transport. Meanwhile, the bottom die and the connecting piece can be disassembled and reused, thus solving the problem that the prior floor support plate bottom die is not disassembled
2.3 engineering evaluation
The project has the advantages that the construction period is required to be compact, the quality is high, the traditional cast-in-situ construction mode cannot meet the construction period quality requirement, after the detachable bottom die floor support plate technology is used, truss steel bars are prefabricated in a factory in advance in the form, the field multi-station operation is performed cooperatively, a large amount of construction time is saved, the part of material cost is saved due to the repeated utilization of the detachable form, the concept of green assembly construction is more met, and the application effect is good.
What has been described above is merely some embodiments of the present application. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the application.
Claims (4)
1. The utility model provides a construction method of a floor support plate truss with a detachable bottom die, which is characterized by comprising the following steps:
step 1, construction preparation: the bottom die of the steel bar truss floor support plate adopts a bamboo glue plate or a wood glue plate with the thickness not less than 15mm, the bending strength design value of the bottom die is not less than 15N/mm, and the side die plates adopt galvanized steel plates with the thickness of 2 mm;
step 2, building carrier plate assembly: an assembly workbench is arranged, the workbench is fixed at a preset position of a site, 3 groups of steel bar trusses are placed on the installation workbench at equal intervals in parallel, and the steel bar trusses are connected with a bottom die of a steel bar truss floor support plate in a connecting mode of hook connection, bolt connection and the like;
step 3, construction paying-off: ejecting control lines of the steel bar truss floor carrier plates according to the central lines of the beams and the control lines of the steel bar truss floor carrier plate layout, and ejecting position points of the pegs on the specific steel beams according to the position diagrams of the pegs;
step 4, hoisting the floor support plate;
step 5, mounting a floor support plate: the floor carrier plate is placed in the following order: paving each layer of steel bar truss template according to the initial position of the construction drawing, paving one side of each layer of steel bar truss template in sequence, and finally treating corner positions; after the floor carrier plates are paved, aluminum blind rivet stitching is carried out on the lap joint parts between the plates, the aluminum blind rivet spacing is 200mm, and the specification of the aluminum blind rivets is phi 5x10; after the steel bar truss floor support plate is in place, the vertical steel bars at the end parts of the steel bar truss floor support plate are firmly spot-welded with the steel beams, and the transverse steel bars are in butt welding connection; binding additional steel bars after a certain area of the steel bar truss floor support plate is paved;
step 6, pipeline laying: arranging floor slab support connecting steel bars, additional steel bars and distributed steel bars, and binding and connecting with a steel bar truss;
arranging hole edge reinforcing ribs and side molds at reserved holes of the steel bar truss floor support plates, and cutting the non-detachable bottom plate and the hole opening steel bars after the concrete reaches the design strength;
when the concentrated load of the hole is larger than the preset load or the hole side length is larger than 900, arranging a hole side beam;
pipeline is laid in the plate, rigid pipeline is adopted when the plate is worn forward, and flexible material is adopted when the plate is worn obliquely; adopting a pipeline with smaller diameter, and dispersing and perforating for pre-burying;
the embedded box body is fixed on the bottom plate, and when the bottom plate is not detachable, a round hole with the diameter not more than 30m is formed in the position of the box body on the bottom plate;
step 7, side die installation: in the steel structure engineering, after each steel bar truss floor support plate is paved and adjusted in place, the following measures are taken to ensure that the bottom plate and the steel bar truss are connected with the wall, the column and the Liang Laogu:
the support length of the non-detachable steel bar truss floor support plate in the length direction is not less than the maximum value of 5d and 50mm, the support length is the distance between the edge of the upper flange of the steel beam and the end vertical support steel bar, and d is the diameter of the lower chord steel bar of the steel bar truss;
the lap joint length of the bottom plate and the steel beam in the width direction of the template is not less than 30mm;
the detachable steel bar truss floor support plate adopts a mode of edge banding, the edge banding is fixed with the bottom plate by aluminum blind rivets, and the edge banding is fixed with the supporting angle steel or the steel beam by spot welding;
pre-welding supporting angle steel on the steel column when the steel bar truss floor support plate at the steel column is paved, cutting off a bottom plate of a collision part with the steel column, and welding the upper chord steel bar and the lower chord steel bar with the steel column;
step 8, pouring concrete;
step 9, removing the template: the formwork is removed by adopting an early-dismantling scheme, when the concrete strength of the floor reaches about 40% -50%, a large-area formwork without a supporting part is removed firstly, the formwork with a temporary supporting part is reserved, after the concrete strength reaches a threshold value, the formwork is removed again when the temporary support is removed, the transverse distance between the temporary support vertical rods is 900mm, the longitudinal distance is 1200mm, and the formwork is arranged at the vertical rod supporting position singly, wherein the width of the formwork is 120-150 mm;
and (3) hook connection: firstly, loosening the connecting piece and the web member of the steel bar truss, and removing the bottom plate and the connecting piece of the steel bar truss to finish the removal of the bottom plate;
and (3) bolt connection: firstly, loosening the bearing screw rod and the lifting point nut, taking down the bottom plate and the bearing screw rod, and completing the dismantling of the bottom plate, and for the steel bar truss concrete floor engineering with temporary support, dismantling the temporary support above the concrete strength reaching 75% of the design strength, and taking down the bottom plate at the temporary support position after the support is dismantled.
2. The method for constructing the truss of the floor support plate integrally assembled with the detachable bottom die according to claim 1, wherein in the step 4, the lifting of the floor support plate comprises:
before hoisting, checking whether the steel bar truss template connecting piece is deformed or not, and whether the hooks between the plate and the bottom plate are firmly connected or not;
firstly, testing and hoisting the plates after the floor is proportioned, and hoisting the plates after meeting the requirements;
when in hoisting, hoisting is carried out in sequence according to the layout and the marks of the steel bar truss template, and the steel bar truss template is hoisted to each construction joint in a partitioning and slicing mode;
after the floor supporting plate is hung to the floor to be in place, the floor supporting plate is stably placed and timely installed, and is not stacked in a concentrated mode.
3. The method of constructing a truss for integrally assembled floor support with a removable bottom form according to claim 1, wherein in step 8, the concrete pouring comprises:
the concrete pump pipe cannot be supported on the bottom plate, the steel bars and the embedded parts of the steel bar truss floor support plate, and the horizontal pump pipe is fixed by adopting a bracket and is provided with anti-sliding measures; the impact force applied to the variable diameter part of the joint of the pump pipe and the towed concrete conveying pump, the turning part of the horizontal pump pipe and the variable vertical pipe of the horizontal pipe is large, the inclined struts are adopted for reinforcement, and the vertical pipe is fixed by adopting a special-purpose cross frame;
when the concrete is poured, constructors and equipment are positioned at the positions of the main beam and the secondary beam, and the concrete cannot be directly impacted or poured on the steel bar truss floor support plate; the concrete stacking height on the reinforced truss floor support plate is strictly controlled in the concrete pouring process, and the smaller of the thickness of the floor slab is not more than 300mm and 2 times;
in the concrete vibrating process, a flat vibrator is adopted for vibrating, an inserted vibrator is not adopted for vibrating, and in the concrete vibrating process, a steel bar truss floor support plate is not contacted;
in the concrete curing process, people or overload is strictly forbidden on the steel bar truss floor support plate.
4. The method of constructing a bottom form removable integrally assembled floor deck truss of claim 1, wherein after step 5, the system further comprises:
and (3) detail treatment: when the details are processed, the building board is surrounded into a closed circle by the K board at the place with the continuous vertical templates and is used as a connecting component of the vertical templates of the upper layer, the K board is connected with the concrete of the lower layer which is poured by the embedded bolts, and is connected with the wall, the outer templates of the column and the inner templates of the elevator shaft when the upper layer is installed, and the verticality and the flatness of the outer concrete of the two layers are ensured; installing a balcony hanging die, wherein the lower edge of the hanging die plate is padded by a reinforced stirrup, the reinforced stirrup is fixed on a flat plate, the split heads are connected and fastened by iron wires, and if the drop height of two sides of the hanging die plate is large, the split heads are connected with the opposite die plate of the hanging die plate by opposite-pull screws; when the internal corner of the steel bar truss building support plate is disassembled for construction, one end of the steel plate is fixed with the wall, column and beam templates, and the other end of the steel plate is sewn with the side template aluminum blind rivets, and the steel plate is in a proper shape according to the gaps;
before the floor steel bar binding, in order to prevent the whole movement of the steel bar truss floor support plate, the truss end head is fixed on the upper opening of the beam or the wall side template by adopting temporary limit iron nails, 2 iron nails are respectively nailed at four corners of each template to be fixed, and after the floor steel bar binding is finished, the floor support plate and the floor steel bar form a whole, and then the temporary limit iron nails are pulled out.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310696569.5A CN116927404A (en) | 2023-06-13 | 2023-06-13 | Construction method for integrally assembled floor support plate truss with detachable bottom die |
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| CN202310696569.5A CN116927404A (en) | 2023-06-13 | 2023-06-13 | Construction method for integrally assembled floor support plate truss with detachable bottom die |
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