CN115198958B - Steel pipe truss prestressed concrete precast slab - Google Patents
Steel pipe truss prestressed concrete precast slab Download PDFInfo
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- CN115198958B CN115198958B CN202211055449.9A CN202211055449A CN115198958B CN 115198958 B CN115198958 B CN 115198958B CN 202211055449 A CN202211055449 A CN 202211055449A CN 115198958 B CN115198958 B CN 115198958B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 101
- 239000010959 steel Substances 0.000 title claims abstract description 101
- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 36
- 230000002787 reinforcement Effects 0.000 claims abstract description 12
- 239000004567 concrete Substances 0.000 claims description 23
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000000149 penetrating effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
- E04C2/06—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres reinforced
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/44—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose
- E04C2/50—Self-supporting slabs specially adapted for making floors ceilings, or roofs, e.g. able to be loaded
-
- 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
- E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
- E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Panels For Use In Building Construction (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The application discloses a steel pipe truss prestressed concrete precast slab, which relates to the technical field of precast superimposed sheets and comprises a bottom plate and a steel reinforcement framework arranged on the bottom plate, wherein the steel reinforcement framework comprises two fixed side frames, a plurality of longitudinal ring frames arranged along the width direction of the bottom plate and a plurality of transverse ring frames arranged along the length direction of the bottom plate; each transverse ring frame is movably sleeved on each longitudinal ring frame to form a double-layer grid structure, two ends of the double-layer grid structure are respectively and movably connected to the two fixed side frames, the double-layer grid structure can move and is provided with a hoisting station on a moving stroke, one end of each longitudinal ring frame is respectively hooked with the two fixed side frames during the hoisting station, the other end of each longitudinal ring frame is hooked with each transverse ring frame of the set, each transverse ring frame of the set is a hoisting bearing structure, a hoisting rope is directly hooked to two ends of the hoisting bearing structure to hoist, and the bottom plate is balanced in stress.
Description
Technical Field
The application relates to the technical field of prefabricated superimposed sheets, in particular to a steel pipe truss prestressed concrete prefabricated plate.
Background
The main stream construction mode of the building cover and the roof of the multi-story high-rise building mainly comprises the steps of cast-in-situ concrete integral pouring, setting up a specified temporary scaffold on a construction site, setting up a template on the scaffold, configuring steel bars according to requirements, then carrying out concrete pouring on site, and dismantling the template and the scaffold after the building cover and the roof are solidified. In recent years, the application of the concrete truss composite slab in the building industry is more and more extensive, the concrete truss composite slab mainly comprises a bottom plate and a truss, the concrete truss composite slab integrally formed by pouring the bottom plate and the truss can reduce the number of construction templates and scaffolds in the construction process, improve the construction efficiency and further reduce the construction cost.
The steel pipe truss comprises a steel pipe and a plurality of longitudinal prestressed steel bars arranged in the steel pipe, wherein the steel pipe truss comprises a steel pipe and wavy steel bars welded on two sides of the steel pipe, the wavy steel bars comprise wave crest sections, wave trough sections and web members between the wave crest sections and the wave trough sections, the wave trough sections or/and the lower sections of the web members of the wavy steel bars are/is transversely bent to form bent V-shaped supporting force transmission components, the wave trough sections or/and the transverse lower sections of the transverse bent web members are/is transversely embedded in the steel pipe, the vertical lower sections of the web members are/is embedded in the concrete bottom, the longitudinal prestressed steel bars are arranged on the bent V-shaped supporting force transmission components, and the longitudinal prestressed steel bars and the bent V-shaped supporting force transmission components are integrally glued by concrete.
And the patent application with the name of CN105756252B is entitled prestressed concrete truss superimposed sheet and manufacturing method thereof, which comprises a concrete bottom plate, wherein trusses are arranged on the concrete bottom plate, each truss comprises an upper chord member, the two sides of the upper chord member are respectively provided with a first web member and a second web member, the first web member and the second web member are continuously bent reinforcing steel bars, the bent parts at the tops of the first web member and the second web member are connected with the outer wall of the upper chord member, the bent parts at the bottoms of the first web member and the second web member are embedded into the concrete bottom plate, a plurality of prestressed longitudinal bars are arranged in the concrete bottom plate, the length direction of each prestressed longitudinal bar is parallel to the length direction of the upper chord member, 1-5 transverse reinforcing steel bars are respectively arranged in the two ends of the concrete bottom plate, the length direction of each transverse reinforcing steel bar is perpendicular to the length direction of the prestressed longitudinal bar, the length direction of each transverse auxiliary reinforcing steel bar is perpendicular to the length direction of the equal prestressed longitudinal bar, each transverse auxiliary reinforcing steel bar is arranged in the concrete bottom plate at the 1-3 bent parts at the two ends of the first web member and the second web member, each transverse auxiliary reinforcing steel bar is located at one side far away from the transverse auxiliary web member from the longitudinal bar from the bottom of the first web member.
The main body structure of the steel pipe truss prestressed concrete superimposed sheet in the prior art including the patent is composed of a bottom plate and two trusses arranged on the bottom plate, and the main body structure is characterized in that: 1. in the process of hoisting the superimposed sheet, such as loading and unloading and hoisting the top of a building for construction, the lifting rope is obliquely hooked on the truss, the truss at the hooking position of the lifting rope can slightly bend and deform, the gravity of the bottom plate acts on a local structure at the connecting position of the truss and the lifting rope, namely, local stress points are formed between the truss and the bottom plate, the connecting points of the truss and the bottom plate cannot be uniformly stressed, and the mass of the bottom plate is far greater than that of the truss, so that the connecting structure between the truss and the bottom plate at the local stress points is excessively loaded to cause damage deformation or even fracture; 2. in the storage and transportation, a plurality of this superimposed sheet all are the pile and stack together, easily cause the truss deformation of superimposed sheet of bottom, especially in the transportation, when the trailer of delivery superimposed sheet gets into the relatively poor building site of road conditions, jolt comparatively serious, very easily cause the truss deformation of superimposed sheet of bottom, this just makes the workman need correct the superimposed sheet truss of deformation when being under construction, has pulled down the efficiency of construction.
Disclosure of Invention
The application aims to provide a steel pipe truss prestressed concrete precast slab, which aims to solve the defects in the prior art.
In order to achieve the above object, the present application provides the following technical solutions: the steel pipe truss prestressed concrete precast slab comprises a bottom plate and a steel reinforcement framework arranged on the bottom plate, wherein the steel reinforcement framework comprises two fixed side frames, a plurality of longitudinal ring frames and a plurality of transverse ring frames, the longitudinal ring frames are arranged along the width direction of the bottom plate, the transverse ring frames are arranged along the length direction of the bottom plate, and the two fixed side frames are respectively arranged on two opposite sides of the bottom plate; each transverse ring frame is movably sleeved on each longitudinal ring frame to form a double-layer grid structure, two ends of the double-layer grid structure are respectively and movably connected to the two fixed side frames, the double-layer grid structure can move and is provided with a hoisting station on the moving stroke, one end of each longitudinal ring frame is respectively hooked with the two fixed side frames during the hoisting station, the other end of each longitudinal ring frame is hooked with each transverse ring frame in a collection, and each transverse ring frame in the collection is a hoisting bearing structure.
Further, each longitudinal ring frame is provided with a hinge end and a hook end in the length direction, and each longitudinal ring frame is alternately hinged with the two fixed side frames along the transverse direction through the hinge ends; when each longitudinal ring frame rotates to a horizontal state, the hook end of each longitudinal ring frame is hooked on a fixed side frame which is not hinged with the longitudinal ring frame, and each longitudinal ring frame and each transverse ring frame are staggered to form the double-layer grid structure; and when each longitudinal ring frame rotates to the hoisting station, the projections of the hook ends of each longitudinal ring frame in the transverse direction are overlapped, and each transverse ring frame slides to the hook ends to be assembled to form the hoisting bearing structure.
Further, the longitudinal ring frame comprises an upper longitudinal rib and a lower longitudinal rib which are parallel, the transverse ring frame comprises an upper transverse rib and a lower transverse rib which are parallel, the upper longitudinal rib is movably arranged between the upper transverse rib and the lower transverse rib in a penetrating way, and the lower transverse rib is movably arranged between the upper longitudinal rib and the lower longitudinal rib in a penetrating way.
Further, the spacing between the upper and lower longitudinal ribs is equal to the spacing between the upper and lower transverse ribs, which are each half the height of the fixed side frame.
Further, the hinge end is an annular structure formed by connecting the ends of the upper longitudinal ribs and the lower longitudinal ribs, and the annular structure is movably sleeved at the top of the fixed side frame.
Further, the hook end comprises a first hook and a second hook, wherein the first hook is formed by bending an upper longitudinal rib, when the longitudinal ring frame rotates to a horizontal state, the first hook is in hooking fit with a corresponding side fixing frame, the second hook is formed by bending a lower longitudinal rib, and when the longitudinal ring frame rotates to a lifting station, the second hook is in hooking fit with the lifting bearing structure.
Further, the positions, close to the two ends, on the upper transverse rib are respectively concavely bent to form a limiting part.
Further, the bottom plate comprises prestress steel bar mechanisms which are arranged in a crisscross mode and a concrete layer which is used for coating the steel bar network structure.
Further, the fixed side frame comprises a steel pipe and at least one wavy steel bar which are transversely arranged, the top of the wavy steel bar is fixedly connected to the steel pipe, and the bottom of the wavy steel bar is fixedly connected to the bottom plate.
Further, the wavy steel bar is provided with a plurality of horizontal sections extending along the transverse direction, and each horizontal section is embedded into the bottom plate.
In the technical scheme, when the steel pipe truss prestressed concrete precast slab is stored and transported, each transverse ring frame is movably sleeved on each longitudinal ring frame to form a double-layer grid structure, the double-layer grid structure is horizontally hooked on two fixed side frames, and the two fixed side frames are connected and limited in the width direction of the bottom plate, so that after a plurality of steel pipe truss prestressed concrete precast slabs are stacked together, the two fixed side frames and the double-layer grid structure support the steel pipe truss prestressed concrete precast slab above, and the fixed side frames are stable and not easy to deform. When the double-layer grid structure moves to the hoisting station, one end of each longitudinal ring frame is uniformly hooked on the fixed side frames on two sides, the other end of each longitudinal ring frame is intersected to the right upper part of the central line of the bottom plate and is sleeved with each transverse ring frame of the assembly, each transverse ring frame of the assembly forms a strong and difficult-to-deform hoisting bearing structure, the hoisting ropes are directly hooked to the two ends of the hoisting bearing structure to hoist, the hoisting bearing structure and each longitudinal ring frame are uniformly stressed, the two fixed side frames and each longitudinal ring frame on the two fixed side frames are uniformly stressed, the stress between each connecting point of the bottom plate and the two fixed side frames is balanced, the steel pipe truss prestressed concrete precast slab is difficult to break, and the steel pipe truss prestressed concrete precast slab is stable during hoisting. After the vertical ring frames are hoisted to the roof, the hoisting ropes are loosened, the vertical ring frames are alternately rotated and flattened on the two fixed side frames, the distance between the horizontal ring frames is adjusted in a sliding mode, concrete pouring can be directly carried out, and the double-layer grid structure becomes a concrete framework.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
Fig. 1 is a schematic structural diagram i of the stacking device according to the embodiment of the present application when stacking or when constructing;
FIGS. 2-3 are left side views of a structure of the present application when stacked or in use for construction;
fig. 4 is a schematic structural diagram i of a longitudinal ring frame according to an embodiment of the present application;
fig. 5 is a schematic structural view of a transverse ring frame according to an embodiment of the present application;
fig. 6 is a schematic structural diagram ii of the stacking apparatus according to the embodiment of the present application when stacking or construction is performed;
fig. 7 is a schematic structural diagram ii of a longitudinal ring frame according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a lifting station according to an embodiment of the present application;
FIG. 9 is a front view of a lifting station according to an embodiment of the present application;
fig. 10 is a schematic diagram of a connection structure between a prestressed reinforcement mechanism and a fixed side frame according to an embodiment of the present application;
FIG. 11 is a schematic diagram I of a fixed side frame according to an embodiment of the present application;
FIG. 12 is a schematic structural diagram II of a fixed side frame according to an embodiment of the present application;
FIG. 13 is a schematic diagram III of a fixed side frame according to an embodiment of the present application;
FIG. 14 is a schematic view of a connection structure between a fixed side frame and a bottom plate according to an embodiment of the present application;
FIG. 15 is a schematic view of another embodiment of the present application;
fig. 16 is a schematic structural diagram of the warehouse and transportation according to the embodiment of the present application;
fig. 17 is a schematic structural diagram of the construction according to the embodiment of the present application.
Reference numerals illustrate:
1. a bottom plate; 1.1, a prestress steel bar mechanism; 2. a reinforcement cage; 2.1, fixing a side frame; 2.11, steel pipes; 2.12, wavy steel bars; 2.121, horizontal segment; 2.2, a longitudinal ring frame; 2.21, hinged end; 2.22, a hook end; 2.221, first hook; 2.222, a second hook; 2.223, longitudinal connecting sections; 2.23, upper longitudinal ribs; 2.24, lower longitudinal ribs; 2.3, a transverse ring frame; 2.31, upper transverse ribs; 2.32, lower transverse ribs; 2.33, a limiting part; 2.34, a transverse connecting section; 3. hoisting the bearing structure; 4. a movable reinforcing bar; 5. a connecting rod; 6. triggering the block.
Detailed Description
In order to make the technical scheme of the present application better understood by those skilled in the art, the present application will be further described in detail with reference to the accompanying drawings.
Referring to fig. 1-17, the steel pipe truss prestressed concrete precast slab provided by the embodiment of the application comprises a bottom plate 1 and a steel reinforcement framework 2 arranged on the bottom plate 1, wherein the steel reinforcement framework 2 comprises two fixed side frames 2.1, a plurality of longitudinal ring frames 2.2 arranged along the width direction of the bottom plate 1 and a plurality of transverse ring frames 2.3 arranged along the length direction of the bottom plate 1, and the two fixed side frames 2.1 are respectively arranged on two opposite sides of the bottom plate 1; the two ends of the double-layer grid structure are respectively movably connected to the two fixed side frames 2.1, the double-layer grid structure can move and is provided with a hoisting station on the moving stroke, one end of each longitudinal ring frame 2.2 is respectively hooked with the two fixed side frames 2.1 during the hoisting station, the other end of each longitudinal ring frame 2.2 is hooked with each transverse ring frame 2.3 of the collection, and each transverse ring frame 2.3 of the collection is a hoisting bearing structure 3.
Specifically, each longitudinal ring frame 2.2 has a hinge end 2.21 and a hook end 2.22 in the length direction, each longitudinal ring frame 2.2 is alternately hinged with two fixed side frames 2.1 along the transverse direction (the length direction of the bottom plate 1 and the fixed side frames 2.1) through the hinge end 2.21, namely, the hinge end 2.21 of one of any adjacent two longitudinal ring frames 2.2 is hinged with the top of one fixed side frame 2.1, and the hinge end 2.21 of the other is hinged with the top of the other fixed side frame 2.1; when each longitudinal ring frame 2.2 rotates to a horizontal state, the hooked ends 2.22 of each longitudinal ring frame 2.2 are hooked on fixed side frames 2.1 which are not hinged with the longitudinal ring frames, each longitudinal ring frame 2.2 and each transverse ring frame 2.3 are staggered to form a double-layer grid structure, when a plurality of steel pipe truss prestressed concrete precast slabs can be stacked for storage and transportation, two ends of each longitudinal ring frame 2.2 are hooked on two fixed side frames 2.1 respectively, so that the two fixed sides are not easy to deform, and the double-layer grid structure can obviously improve the strength of a roof poured by later concrete; when each longitudinal ring frame 2.2 rotates to the hoisting station, the projections of the hooked ends 2.22 of each longitudinal ring frame 2.2 in the transverse direction are overlapped, and each transverse ring frame 2.3 slides to the hooked ends 2.22 to be assembled to form the hoisting bearing structure 3.
In the technical scheme, when the steel pipe truss prestressed concrete precast slab is stored and transported, each transverse ring frame 2.3 is movably sleeved on each longitudinal ring frame 2.2 to form a double-layer grid structure, the double-layer grid structure is horizontally hooked on the two fixed side frames 2.1, and the two fixed side frames 2.1 are connected and limited in the width direction of the bottom plate 1, so that after a plurality of steel pipe truss prestressed concrete precast slabs are stacked together, the steel pipe truss prestressed concrete precast slab above the two fixed side frames 2.1 and the double-layer grid structure are jointly supported, and the fixed side frames 2.1 are stable and not easy to deform. When the double-layer grid structure moves to a hoisting station, one end of each longitudinal ring frame 2.2 is uniformly hooked on the fixed side frames 2.1 on two sides, the other end is intersected to the right upper part of the central line of the bottom plate 1 and is sleeved with each assembled transverse ring frame 2.3, each assembled transverse ring frame 2.3 forms a strong and difficult-to-deform hoisting bearing structure 3, a hoisting rope is directly hooked on two ends of the hoisting bearing structure 3 to hoist, the hoisting bearing structure 3 and each longitudinal ring frame 2.2 are uniformly stressed, the two fixed side frames 2.1 and each longitudinal ring frame 2.2 on the two fixed side frames are uniformly stressed, and stress between each connecting point of the bottom plate 1 and the two fixed side frames 2.1 is balanced, so that the steel pipe truss prestressed concrete precast slab is difficult to break and stable in hoisting. After being hoisted to the roof, the hoisting ropes are loosened, the longitudinal ring frames 2.2 are alternately rotated and flattened on the two fixed side frames 2.1, the spacing between the transverse ring frames 2.3 is adjusted in a sliding mode, and concrete pouring can be directly carried out, and the double-layer grid structure becomes a concrete double-layer framework.
As a preferred technical solution of this embodiment, the longitudinal ring frame 2.2 includes upper longitudinal ribs 2.23 and lower longitudinal ribs 2.24 that are parallel, a hinge end 2.21 is formed between one of the corresponding ends of the upper longitudinal ribs 2.23 and the lower longitudinal ribs 2.24, a hook end 2.22 is formed between the other corresponding ends, the transverse ring frame 2.3 includes upper transverse ribs 2.31 and lower transverse ribs 2.32 that are parallel, the upper longitudinal ribs 2.23 are movably disposed between the upper transverse ribs 2.31 and the lower transverse ribs 2.32, the lower transverse ribs 2.32 are movably disposed between the upper longitudinal ribs 2.23 and the lower longitudinal ribs 2.24, and when each longitudinal ring frame 2.2 is rotated to a horizontal state, each upper transverse rib 2.31 is connected to each upper longitudinal rib 2.23 to form an upper layer of grid structure, each lower transverse rib 2.32 is connected to each lower longitudinal rib 2.24 to form a middle layer of grid structure (the upper layer of grid structure is formed between the upper layer of grid structure and the middle layer of grid structure); further, the space between the upper longitudinal ribs 2.23 and the lower longitudinal ribs 2.24 is equal to the space between the upper transverse ribs 2.31 and the lower transverse ribs 2.32, which is half of the height of the fixed side frame 2.1, so that the middle-layer grid structure is positioned in the middle between the upper-layer grid structure and the bottom plate 1, and the strength of the roof poured by the later concrete can be balanced.
Preferably, the hinge end 2.21 is a loop formed by connecting the ends of the upper and lower longitudinal ribs 2.23, 2.24 and movably sleeved on top of the fixed side frame 2.1. Further, the hook end 2.22 includes a first hook 2.221 and a second hook 2.222, the first hook 2.221 being formed by bending the upper longitudinal rib 2.23, and the first hook 2.221 being hooked with the corresponding side mount when the longitudinal ring frame 2.2 is rotated to a horizontal state; the second crotch 2.222 is formed by buckling of lower longitudinal ribs 2.24, and when vertical ring frame 2.2 rotates to the hoist and mount station, second crotch 2.222 and hoist and mount bearing structure 3 hook-in-line cooperation to second crotch 2.222 has still formed double protection structure with first crotch 2.221, if unexpected circumstances such as second crotch 2.222 takes place to warp, damage during hoist and mount, first crotch 2.221 also can link hoist and mount bearing structure 3 secondary hook, greatly reduced the potential safety hazard during hoist and mount.
As a preferable mode, the positions, close to the two ends, of the upper transverse ribs 2.31 are respectively concavely bent to form limiting parts 2.33, the distance between the two limiting parts 2.33 on the same upper transverse steel bar is equal to the distance between the two longitudinal ring frames 2.2 on the two sides, so that the transverse ring frames 2.3 are prevented from sliding relative to the longitudinal ring frames 2.2 in the length direction, in addition, a lifting rope connecting ring is formed between the limiting parts 2.33 and the end parts of the corresponding transverse ring frames 2.3, so that lifting ropes are conveniently arranged on the limiting parts 2.33 in a penetrating manner, the two lifting ropes can be prevented from sliding and folding towards the middle, and the two longitudinal ring frames 2.2 on the two sides are prevented from being deformed due to extrusion of the lifting ropes.
As a preferred technical scheme of the embodiment, the bottom plate 1 comprises prestress steel bar mechanisms 1.1 which are arranged in a crisscross manner and a concrete layer which coats a steel bar network structure. Preferably, the reinforcing mesh structure comprises a plurality of transverse ribs and a plurality of longitudinal ribs, and each transverse rib and each longitudinal rib are crisscrossed.
As a preferred technical solution of this embodiment, the fixed side frames 2.1 include a steel pipe 2.11 and at least one wavy steel bar 2.12 that are transversely arranged, and concrete slurry is filled in the steel pipe 2.11 to improve strength, and optionally, the steel pipe 2.11 can be replaced by a solid steel bar, the top of the wavy steel bar 2.12 is fixedly connected to the steel pipe 2.11, the bottom is fixedly connected to the bottom plate 1, specifically, the bottoms (trough) of the wavy steel bars 2.12 on the two fixed side frames 2.1 are respectively fixedly connected with a transverse rib, and the ends of the longitudinal ribs are connected to the connection points of the transverse ribs and the wavy steel bars 2.12, so that the strength of the bottom plate 1 and the fixed side frames 2.1 can be enhanced. Further, the wavy reinforcing steel bar 2.12 is provided with a plurality of horizontal sections 2.121 extending along the transverse direction, each horizontal section 2.121 is embedded into the bottom plate 1, and the horizontal sections 2.121 can strengthen the connection strength between the fixed side frame 2.1 and the bottom plate 1.
In another embodiment of the present application, referring to fig. 15, the end of the longitudinal ring frame 2.2 is provided with a longitudinal connecting section 2.223, the longitudinal connecting section 2.223 is fixedly connected to the upper longitudinal rib 2.23 at the first hook 2.221, and the longitudinal connecting section 2.223 extends to the outer side of the bottom plate 1 in the width direction. The two ends of the transverse ring frame 2.3 are respectively provided with a transverse connecting section 2.34, and the transverse connecting sections 2.34 extend to the outer side of the bottom plate 1 in the length direction.
In still another embodiment of the present application, referring to fig. 16-17, two ends of the transverse ring frame 2.3 are respectively provided with a transverse connection section 2.34, the transverse connection section 2.34 extends to the outer side of the bottom plate 1, and the transverse connection section 2.34 is parallel to the upper transverse steel bar. When the steel pipe truss prestressed concrete precast slab is used and constructed, the transverse connecting section 2.34 on the steel pipe truss prestressed concrete precast slab extends into a double-layer grid structure on the adjacent steel pipe truss prestressed concrete precast slab, so that connection between the two adjacent steel pipe truss prestressed concrete precast slabs is facilitated.
The movable steel bar 4 is movably arranged on the steel tube 2.11, in particular, the circular ring is fixedly connected on the steel tube 2.11, the movable steel bar 4 is arranged in the circular ring in a penetrating manner, the movable steel bar 4 can rotate relative to the circular ring, the movable steel bar 4 can also axially slide along the circular ring, a plurality of parallel connecting rods 5 are fixedly connected on the movable steel bar 4, and the trigger block 6 is welded on the movable steel bar 4. In the process of stacking, storing and transporting the steel pipe truss prestressed concrete precast slabs, each longitudinal ring frame 2.2 and each transverse ring frame 2.3 are staggered to form a double-layer grid structure, at this time, the trigger block 6 is staggered with the end parts of the longitudinal ribs forming the first hooks 2.221, and each connecting reinforcing steel bar is kept in a vertically downward state under the action of gravity, as shown in fig. 16; when the steel pipe truss prestressed concrete precast slab is hoisted, the movable steel bars 4 are axially moved to enable the trigger blocks 6 to be located on the movable paths of the first hooks 2.221 of the longitudinal ring frames 2.2, after hoisting is finished, the longitudinal ring frames 2.2 are rotated, in the process of enabling the longitudinal ring frames 2.2 to be rotated to be horizontally hooked on the fixed side frames 2.1 which are not hinged with the longitudinal ring frames, the ends of the longitudinal ribs forming the first hooks 2.221 are abutted to the corresponding trigger blocks 6 and the trigger blocks 6 are pressed down, so that the movable steel bars 4 are rotated by 90 degrees, the movable steel bars 4 drive the connecting rods 5 on the movable steel bars 4 to rotate by 90 degrees to be in a horizontal state, at the moment, the trigger blocks 6 are exactly clamped by the longitudinal first hooks 2.221, so that the movable steel bars 4 cannot rotate, and the connecting rods 5 are kept in the horizontal state, and extend to the outer sides of the steel bar net frame, so that the connecting rods 5 are conveniently connected with the steel bar net frame of the adjacent steel pipe truss prestressed concrete precast slab.
While certain exemplary embodiments of the present application have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the application. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the application, which is defined by the appended claims.
Claims (10)
1. The steel pipe truss prestressed concrete precast slab comprises a bottom plate (1) and a steel reinforcement framework (2) arranged on the bottom plate (1), and is characterized in that the steel reinforcement framework (2) comprises two fixed side frames (2.1), a plurality of longitudinal ring frames (2.2) arranged along the width direction of the bottom plate (1) and a plurality of transverse ring frames (2.3) arranged along the length direction of the bottom plate (1), and the two fixed side frames (2.1) are respectively arranged on two opposite sides of the bottom plate (1);
each transverse ring frame (2.3) is movably sleeved on each longitudinal ring frame (2.2) to form a double-layer grid structure, two ends of the double-layer grid structure are respectively and movably connected to the two fixed side frames (2.1), the double-layer grid structure can move and is provided with a hoisting station on a movable stroke, one end of each longitudinal ring frame (2.2) is respectively hooked with two fixed side frames (2.1) during the hoisting station, the other end of each longitudinal ring frame (2.2) is hooked with each transverse ring frame (2.3) of the collection, and each transverse ring frame (2.3) of the collection is a hoisting bearing structure (3).
2. A steel truss prestressed concrete precast slab according to claim 1, wherein each of the longitudinal ring frames (2.2) has a hinge end (2.21) and a hook end (2.22) in a length direction, and each of the longitudinal ring frames (2.2) is hinged with the two fixed side frames (2.1) alternately in a transverse direction through the hinge ends (2.21) thereof;
when each longitudinal ring frame (2.2) rotates to a horizontal state, the hooked end (2.22) of each longitudinal ring frame (2.2) is hooked on a fixed side frame (2.1) which is not hinged with the longitudinal ring frame, and each longitudinal ring frame (2.2) and each transverse ring frame (2.3) are staggered to form the double-layer grid structure;
and when each longitudinal ring frame (2.2) rotates to the hoisting station, the projections of the hook ends (2.22) of each longitudinal ring frame (2.2) in the transverse direction are overlapped, and each transverse ring frame (2.3) slides to the hook ends (2.22) to be assembled to form the hoisting bearing structure (3).
3. A steel truss prestressed concrete precast slab according to claim 2, wherein the longitudinal ring frame (2.2) includes upper and lower longitudinal ribs (2.23, 2.24) parallel to each other, the transverse ring frame (2.3) includes upper and lower transverse ribs (2.31, 2.32) parallel to each other, the upper longitudinal rib (2.23) movably penetrates between the upper and lower transverse ribs (2.31, 2.32), and the lower transverse rib (2.32) movably penetrates between the upper and lower longitudinal ribs (2.23, 2.24).
4. A steel pipe truss prestressed concrete precast slab according to claim 3, wherein the interval between the upper longitudinal ribs (2.23) and the lower longitudinal ribs (2.24) is equal to the interval between the upper transverse ribs (2.31) and the lower transverse ribs (2.32), which is half of the height of the fixed side frame (2.1).
5. A steel truss prestressed concrete precast slab according to claim 3, wherein the hinge end (2.21) is a ring structure formed by connecting ends of the upper longitudinal ribs (2.23) and the lower longitudinal ribs (2.24), and the ring structure is movably sleeved on top of the fixed side frame (2.1).
6. A steel pipe truss prestressed concrete precast slab according to claim 3, wherein the hooked end (2.22) comprises a first hook (2.221) and a second hook (2.222), the first hook (2.221) being formed by bending of the upper longitudinal rib (2.23), the first hook (2.221) being hooked with the corresponding side fixing frame when the longitudinal ring frame (2.2) is rotated to a horizontal state, the second hook (2.222) being formed by bending of the lower longitudinal rib (2.24), the second hook (2.222) being hooked with the lifting bearing structure (3) when the longitudinal ring frame (2.2) is rotated to a lifting position.
7. A steel pipe truss prestressed concrete precast slab according to claim 3, wherein the upper transverse ribs (2.31) are respectively concavely bent at positions near both ends to form limit portions (2.33).
8. A steel pipe truss prestressed concrete precast slab according to claim 1, characterized in that the bottom plate (1) comprises crisscrossed prestressed reinforcement mechanisms (1.1) and concrete layers coating the crisscrossed prestressed reinforcement mechanisms (1.1).
9. A steel truss prestressed concrete precast slab according to claim 1, characterized in that the fixed side frames (2.1) comprise steel pipes (2.11) arranged transversely and at least one wavy steel bar (2.12), the top of the wavy steel bar (2.12) is fixedly connected to the steel pipes (2.11), and the bottom is fixedly connected to the bottom plate (1).
10. A steel truss pre-stressed concrete precast slab according to claim 9, wherein said corrugated steel bar (2.12) has a plurality of horizontal segments (2.121) extending in a transverse direction, each of said horizontal segments (2.121) being pre-embedded into the bottom plate (1).
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| CN202211055449.9A CN115198958B (en) | 2022-08-31 | 2022-08-31 | Steel pipe truss prestressed concrete precast slab |
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| CN115198958B true CN115198958B (en) | 2023-11-24 |
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| CN115198958A (en) | 2022-10-18 |
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