CN110284716B - Construction method of lifting plate node structure of steel bar truss floor bearing plate - Google Patents

Construction method of lifting plate node structure of steel bar truss floor bearing plate Download PDF

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Publication number
CN110284716B
CN110284716B CN201910651513.1A CN201910651513A CN110284716B CN 110284716 B CN110284716 B CN 110284716B CN 201910651513 A CN201910651513 A CN 201910651513A CN 110284716 B CN110284716 B CN 110284716B
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steel bar
bar truss
plate
steel
truss floor
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CN110284716A (en
Inventor
李熊飞
欧定文
贾鹏坤
陈永娥
钟兴强
邓双合
胡厚安
纪福强
张孝冬
冯宇
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Chengdu Fourth Construction Engineering Co ltd Of Cdceg
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Chengdu Fourth Construction Engineering Co ltd Of Cdceg
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work

Abstract

The invention discloses a construction method of a lifting plate node structure of a steel bar truss floor bearing plate, which is characterized in that the connection of a steel beam and a bearing plate on the steel bar truss floor bearing plate is completed in a factory, the processing precision and the processing efficiency are effectively ensured, the installation of the steel beam is firstly carried out on site, then the first steel bar truss floor bearing plate and the second steel bar truss floor bearing plate are respectively connected with the steel beam through a steel bar truss, the first gap and the second gap are ensured not to leak slurry, then the first additional rib, the first distribution rib, the second distribution rib and the second additional rib are bound on site, the first additional rib or the first distribution rib is stretched into the second steel bar truss floor bearing plate, the node connection strength is ensured, finally, an edge sealing plate is additionally arranged for carrying out concrete pouring, the method is adopted to effectively reduce the workload of formwork support and welding on the construction site, the pouring quality and the aesthetic measure of concrete are improved, no extra workload is needed for the, the concrete surface can be prevented from being damaged during form removal, the construction efficiency is effectively improved, the labor cost is saved, and the material waste is reduced.

Description

Construction method of lifting plate node structure of steel bar truss floor bearing plate
Technical Field
The invention relates to the technical field of steel bar truss floor bearing plates, in particular to a construction method of a lifting plate node structure of a steel bar truss floor bearing plate.
Background
Along with the continuous development of steel construction, the construction speed of traditional cast-in-place board can not keep up with the construction speed of steel column and girder steel, simultaneously, because the construction of cast-in-place board, still need a large amount of templates and scaffold, this has very big deviation with the on-the-spot construction management requirement of steel construction, mismatch with the work progress. The steel bar truss floor bearing plate is a new building material consisting of the steel bar truss and the floor bearing plate, steel bars in a floor slab are processed into the steel bar truss in a factory, and the steel bar truss and a bottom die are connected into a whole to form a combined template.
However, in the prior art, on the connection problem of the lifting plate node of the floor bearing plate, various special-shaped connecting plates are generally needed, a large amount of welding workload is increased, the connection process is complex, the material waste is caused, the cost is increased, and the construction efficiency is reduced.
Disclosure of Invention
The invention aims to overcome the defects of material waste, cost increase, construction efficiency reduction and the like of a floor bearing plate in a node structure form of a height difference in the prior art, and provides a construction method of a lifting plate node structure of a steel bar truss floor bearing plate.
In order to achieve the purpose, the invention provides the following technical scheme:
the construction method of the lifting plate node structure of the steel bar truss floor bearing plate comprises the following steps:
a. processing all steel beams, a steel bar truss floor bearing plate I and a steel bar truss floor bearing plate II in a factory, and connecting a supporting plate and a stiffening plate at corresponding positions corresponding to the steel beams;
b. mounting the steel beam;
c. installing the first steel bar truss floor bearing plate and the second steel bar truss floor bearing plate, connecting a support vertical rib I to the upper surface of the steel beam top plate in the length direction perpendicular to the first steel bar truss, connecting a support vertical rib II to the upper surface of the supporting plate in the length direction perpendicular to the second steel bar truss, wherein a first gap is formed between the end part of the first bottom die and the top plates of all the steel beams around, and a second gap is formed between the end part of the second bottom die and all the supporting plates around;
d. checking all the first gaps and all the second gaps to ensure that the first gaps and all the second gaps meet preset requirements;
e. binding and attaching a first rib and a first distribution rib in the first steel bar truss floor bearing plate, and binding and attaching a second rib and a second distribution rib in the second steel bar truss floor bearing plate;
f. pouring concrete to complete the construction of the lifting plate node structure of the steel bar truss floor bearing plate;
wherein, every the girder steel contains roof, web and bottom plate, one steel bar truss floor carrier plate contains die block one and a plurality of steel bar truss one, steel bar truss one contains first, web member reinforcing bar one, first, the horizontal muscle of support and erects muscle one, steel bar truss floor carrier plate two contains die block two and a plurality of steel bar truss two, steel bar truss two contains last chord reinforcing bar two, web member reinforcing bar two, second, the horizontal muscle of support and erects muscle two, the width of layer board is greater than and corresponds the interval of roof outer fringe and web.
By adopting the construction method of the lifting plate node structure of the steel bar truss floor bearing plate, the first steel bar truss floor bearing plate, the second steel bar truss floor bearing plate, the steel beam and the supporting plate on the steel bar truss floor bearing plate are connected in a factory, the processing precision and the efficiency are effectively ensured, the steel beam is firstly installed on site, then the first steel bar truss floor bearing plate and the second steel bar truss floor bearing plate are respectively connected with the steel beam through the steel bar truss, and the first gap and the second gap are ensured not to leak slurry, if the gap is less than or equal to 5mm, then the first rib, the first distributed rib, the second distributed rib and the second attached rib are bound on site, finally the edge sealing plate is additionally arranged for concrete pouring, by adopting the construction method, the work load of formwork support and welding on the construction site is effectively reduced, the pouring quality and the aesthetic degree of concrete are favorably improved, and no extra work is needed for the lifting plate nodes with different height differences, guarantee to fall board node safe and reliable, if adopt the structure of removable die block, then can avoid damaging the concrete face of node when form removal, effectively improve the efficiency of construction, save the cost of labor, reduce the material waste.
Preferably, each first support vertical rib is connected with the corresponding top plate in a welded mode, each second support vertical rib is connected with the corresponding support plate in a welded mode, and the length of the lap joint of the second steel bar truss and the support plate is larger than or equal to 50 mm.
Preferably, the outer end of the stiffening plate is flush with the outer end of the steel beam top plate.
Preferably, when the height difference between the first steel bar truss floor bearing plate and the second steel bar truss floor bearing plate is smaller than the thickness of the first steel bar truss floor bearing plate, all the stiffening plates on one side of the supporting plate are connected to the bottom of the supporting plate.
Preferably, one steel bar truss floor bearing plate contains at least two a steel bar truss floor bearing plate unit, two steel bar truss floor bearing plates contain at least two a steel bar truss floor bearing plate two units.
Preferably, when the first steel bar truss floor bearing plate or the second steel bar truss floor bearing plate is a simple plate structure with a span of more than 2.5m, a supporting device is arranged below the middle of the corresponding first steel bar truss floor bearing plate or below the middle of the second steel bar truss floor bearing plate between the steps c and d.
The steel bar truss floor bearing plate comprises at least two steel bar truss floor bearing plate units, namely the steel bar truss floor bearing plate unit is formed by assembling a plurality of steel bar truss floor bearing plate units, the steel bar truss floor bearing plates are similar and convenient to transport and store, the adjacent two steel bar truss floor bearing plate units are buckled and connected, when the span is large or the early-dismantling requirement exists, a first connecting plate is arranged between two adjacent bottom dies in the middle of the steel bar truss floor bearing plate unit, a second connecting plate is arranged between the two adjacent bottom dies in the middle of the steel bar truss floor bearing plate unit, and a steel bar truss does not need to be arranged above the first connecting plate and the second connecting plate, so that the steel bar truss floor bearing plate can be assembled on site, the workload is not large, the supporting frames are arranged below the first connecting plate and the second connecting plate, all the first bottom dies and all the second bottom dies can be detached when the strength of the floor slab concrete reaches about 40% -50%, only the supporting devices, the first connecting plates and the second connecting plates are reserved, and early template detachment is achieved.
Preferably, in the step e, the method further includes that the additional rib or the distribution rib extends into the second steel bar truss floor support plate and is connected with the second lower chord steel bar in a binding manner.
If the steel bar truss direction of the first steel bar truss floor bearing plate is parallel to the steel beam, an additional first steel bar does not need to be additionally arranged, one end part of the distribution rib is made into a Z-shaped anchor and then enters the second steel bar truss floor bearing plate, and if the steel bar truss direction of the first steel bar truss floor bearing plate is perpendicular to the steel beam, the additional rib is additionally arranged, one end part of the additional rib is made into a Z-shaped anchor and then enters the second steel bar truss floor bearing plate, and therefore the joint connection strength is ensured.
Preferably, step e further comprises attaching a peg to both the top surface of the top plate and the top surface of the support plate.
Preferably, when the height difference between the first steel bar truss floor bearing plate and the second steel bar truss floor bearing plate is equal to the height of the steel beam, the second vertical support rib is connected to the upper surface of the bottom plate perpendicular to the length direction of the second steel bar truss.
Preferably, the first steel bar truss floor bearing plate and the second steel bar truss floor bearing plate are both of a structure with a detachable bottom die.
In summary, compared with the prior art, the invention has the beneficial effects that:
1. by adopting the construction method of the lifting plate node structure of the steel bar truss floor bearing plate, the workload of formwork support and welding in a construction site is effectively reduced, the pouring quality and the attractiveness of concrete are favorably improved, extra workload is not needed for the lifting plate nodes with different height differences, the safety and the reliability of the lifting plate nodes are ensured, if the formwork is required to be disassembled, the concrete surface at the nodes can be prevented from being damaged during the formwork disassembly, the construction efficiency is effectively improved, the labor cost is saved, and the material waste is reduced.
Description of the drawings:
fig. 1 is a first schematic structural diagram of a lifting plate node structure of a steel bar truss floor deck in embodiment 1;
fig. 2 is a second structural schematic view of a lifting plate node structure of the steel bar truss floor deck in embodiment 1;
fig. 3 is a schematic structural view of a lifting plate node structure of a steel bar truss floor deck in embodiment 2;
fig. 4 is a schematic structural view of a lifting plate node structure of a steel bar truss floor deck in embodiment 3;
fig. 5 is a flow chart of a construction method of the lifting plate node structure of the steel bar truss floor support plate according to the invention.
The labels in the figure are: 11-top plate, 12-web plate, 13-bottom plate, 21-bottom plate I, 22-bottom plate II, 31-gap I, 32-gap II, 4-supporting plate, 51-upper chord steel bar I, 52-upper chord steel bar II, 61-web member steel bar I, 62-web member steel bar II, 71-lower chord steel bar I, 72-lower chord steel bar II, 8-stiffening plate, 9-bolt, 101-support vertical bar I, 102-support vertical bar II.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1, the lifting plate node structure of the steel bar truss floor support plate of the invention comprises a first steel bar truss floor support plate, a second steel bar truss floor support plate and at least one steel beam, such as a quadrilateral support, the steel beams are arranged on the periphery, each steel beam comprises a top plate 11, a web plate 12 and a bottom plate 13, a planar supporting plate 4 is welded and connected on each steel beam, if the width of the supporting plate 4 is greater than the distance between the outer edge of the corresponding top plate 11 and the web plate 12, preferably, two sides of each web plate 12 are connected with a plurality of stiffening plates 8, the outer ends of the stiffening plates 8 are flush with the outer ends of the corresponding steel beam top plates 11, namely, the outer edge of the supporting plate 4 extends out of the outer end of the stiffening plate 8, preferably, the top surfaces of the top plate 11 and the supporting plate 4 are both connected with studs 9, and the elevation of the first steel bar truss floor bearing plate is higher than that of the second steel bar truss floor bearing plate.
One steel bar truss floor carrier plate contains die block one 21 and a plurality of steel bar truss one, every steel bar truss one contains first 51, web member reinforcing bar 61, first 71 of lower chord reinforcing bar, the horizontal muscle of support and the support erects muscle one 101, steel bar truss floor carrier plate two contains two 22 and two steel bar truss of die block, every two steel bar truss contain two 52 of upper chord reinforcing bar, two 62 of web member reinforcing bar, two 72 of lower chord reinforcing bar, two and two 102 of support vertical muscle.
The end of each first steel bar truss is connected with the top plate of the steel girder in the direction perpendicular to the length direction of the first steel bar truss, the length direction of the first steel bar truss in fig. 1 is perpendicular to the steel girder, so that each first support vertical rib 101 is welded to the upper surface of the top plate 11 of the steel girder, the length direction of the second steel bar truss in fig. 1 is parallel to the steel girder, so that the second steel bar truss in this direction is not overlapped with the supporting plate 4, the end of the second steel bar truss in the other direction of the second steel bar truss floor supporting plate is connected with the supporting plate 4, that is, as shown in fig. 2, each second support vertical rib 102 is welded to the upper surface of the supporting plate 4, and preferably, the overlapping length of the second steel bar truss and the supporting plate 4 is greater than or equal to 50 mm.
Preferably, steel bar truss building carrier plate one still contains attaches muscle one and distributes muscle one, attach muscle one and a plurality of go up chord reinforcement 51 ligature connection, steel bar truss building carrier plate two still contains attaches muscle two and distributes muscle two, attach muscle two with two ligatures of distribution muscle are connected, distribution muscle two respectively with go up chord reinforcement two 52 with two 72 ligatures of lower chord reinforcement are connected, attach muscle one or distribute muscle one stretch into in the steel bar truss building carrier plate two and with two 72 ligatures of lower chord reinforcement are connected.
If the direction of the steel bar truss of the first steel bar truss floor bearing plate is parallel to the steel beam, an additional first steel bar does not need to be added, and one end part of the distribution rib is made into a Z shape and anchored into the second steel bar truss floor bearing plate; if the direction of the steel bar truss of the first steel bar truss floor bearing plate is perpendicular to the steel beam, namely the situation in fig. 1, the additional ribs are added, one end of the additional ribs is made into a Z shape and anchored into the second steel bar truss floor bearing plate.
The first steel bar truss floor bearing plate and the second steel bar truss floor bearing plate preferably adopt a structure of a detachable bottom die in the prior art, so that the die is convenient to detach, and the bottom die material is saved.
The tip of die block one 21 and all around the roof 11 of girder steel has clearance one 31, if the girder steel that all is equipped with around die block one 21, then die block one 21 and every all have clearance one 31 between the girder steel roof 11, the tip of die block two 22 with all around the layer board 4 has clearance two 32, die block two 22 are with the same reason, the size of clearance one 31 and the size of clearance two 32 are in predetermineeing the within range, if be less than or equal to 5mm, do not leak thick liquid when can guaranteeing cast-in-place.
Preferably, one steel bar truss floor support plate contains at least two a steel bar truss floor support plate unit, two steel bar truss floor support plates contain at least two a steel bar truss floor support plate two units, namely every a steel bar truss floor support plate is by a plurality of a steel bar truss floor support plate unit is constituteed, and the transportation of being convenient for is deposited, adjacent two a steel bar truss floor support plate unit lock is connected, adjacent two a steel bar truss floor support plate two unit lock is connected.
By adopting the lifting plate node structure of the steel bar truss floor bearing plate, the planar supporting plate 4 is directly connected to the steel beam, so that the blanking assembly can be carried out in a factory, the standard processing is facilitated, the processing precision and the construction efficiency are improved, the connection stability is improved, the node rigidity is improved, the labor cost is saved, the height difference between the lifting plates is avoided, the thickness of the supporting plate 4 under different height difference conditions does not need to be considered independently, the materials are effectively saved, the economy is improved, the on-site formwork supporting and welding workload is reduced, the energy conservation and environmental protection are facilitated, the pouring quality of a floor slab is improved, the quality hidden danger of the lifting plate node is avoided, the construction period is effectively shortened, meanwhile, when the adopted floor bearing plate is of a detachable bottom die, the later-stage demoulding can be facilitated, the concrete surface is prevented from being damaged during the demoulding, and.
Example 2
As shown in fig. 3, the structure of the lifter plate node structure of a steel bar truss floor deck of the present invention is substantially the same as that of embodiment 1, except that the height difference between the first steel bar truss floor deck and the second steel bar truss floor deck is smaller than the thickness of the first steel bar truss floor deck, all the stiffener plates 8 on one side of the support plate 4 are connected to the bottom of the support plate 4, and the outer edge of the support plate 4 protrudes out of the top 11 of the steel beam, so as to reinforce the support, the support plate 4 may adopt a special-shaped structure, as shown in fig. 3.
Example 3
As shown in fig. 4, the structure of the lifter plate node structure of a steel bar truss floor deck of the present invention is substantially the same as that of embodiment 1, except that when the height difference between the first steel bar truss floor deck and the second steel bar truss floor deck is equal to the height of the steel beam, the support plate 4 can be replaced by the bottom plate 13 of the steel beam, that is, the support plate 4 does not need to be additionally installed, each of the web member steel bars 62 and the support vertical steel bars 102 is respectively welded to the upper surface of the corresponding bottom plate 13, and the top surfaces of the top plate 11 and the bottom plate 13 are both connected with the studs 9.
Example 4
As shown in fig. 5, the construction method of a lifter plate node structure of a steel bar truss floor support plate according to the present invention, which uses the lifter plate node structure of a steel bar truss floor support plate according to embodiment 1 or 2, includes the following steps:
a. processing all steel beams, a steel bar truss floor bearing plate I and a steel bar truss floor bearing plate II in a factory, and connecting a supporting plate 4 and a stiffening plate 8 at corresponding positions corresponding to the steel beams;
b. mounting the steel beam;
c. installing the first steel bar truss floor bearing plate and the second steel bar truss floor bearing plate, connecting a first support vertical rib 101 to the upper surface of the steel beam top plate 11 perpendicular to the length direction of the first steel bar truss, connecting a second support vertical rib 102 to the upper surface of the supporting plate 4 perpendicular to the length direction of the second steel bar truss, wherein a first gap 31 is formed between the end of the first bottom die 21 and the top plates 11 of all surrounding steel beams, and a second gap 32 is formed between the end of the second bottom die 22 and all surrounding supporting plates 4;
d. checking all the first gaps 31 and all the second gaps 32, and ensuring that the first gaps 31 and all the second gaps 32 meet preset requirements;
e. binding and attaching a first rib and a first distribution rib in the first steel bar truss floor bearing plate, and binding and attaching a second rib and a second distribution rib in the second steel bar truss floor bearing plate;
f. pouring concrete to complete the construction of the lifting plate node structure of the steel bar truss floor bearing plate;
wherein, every the girder steel contains roof 11, web 12 and bottom plate 13, steel bar truss floor carrier plate one contains die block one 21 and a plurality of steel bar truss one, steel bar truss one contains first 51, web member reinforcing bar 61, first 71, the horizontal muscle of support and the support erects muscle one 101, steel bar truss floor carrier plate two contains two 22 and a plurality of steel bar truss two of die block, two 52, two 62, two 72, the horizontal muscle of support and the support erects muscle two 102 of upper chord reinforcing bar, the width of layer board 4 is greater than and corresponds the interval of 11 outer edges of roof and web 12.
If the structure in embodiment 3 is adopted, the supporting plate 4 does not need to be installed, and a steel beam is directly adopted.
By adopting the construction method of the lifting plate node structure of the steel bar truss floor bearing plate, the first steel bar truss floor bearing plate, the second steel bar truss floor bearing plate, the steel beam and the supporting plate 4 on the steel bar truss floor bearing plate are connected and assembled in a factory, the processing precision and the efficiency are effectively ensured, the steel beam is firstly installed on site, then the first steel bar truss floor bearing plate and the second steel bar truss floor bearing plate are respectively connected with the steel beam through the first support vertical rib 101 and the second support vertical rib 102, the first bottom die 21 and the second bottom die 22 are respectively ensured to have a first gap 31 and a second gap 32 with no slurry leakage with the steel beam, then the first reinforcement, the first distribution rib, the second distribution rib and the second reinforcement rib are bound on site according to requirements, the first reinforcement rib or the first distribution rib is stretched into the second steel bar truss floor bearing plate, the studs 9 are installed, the negative ribs of the floor are additionally arranged according to specifications, the node connection strength is ensured, and finally the, by adopting the construction method, the workload of formwork support and welding in a construction site is effectively reduced, the pouring quality and the attractiveness of concrete are favorably improved, extra workload is not needed for the descending plate nodes with different height differences, the safety and the reliability of the descending plate nodes are ensured, if the formwork is required to be disassembled, the concrete surface can be prevented from being damaged during the formwork disassembly, the construction efficiency is effectively improved, the labor cost is saved, and the material waste is reduced.
When the span is large, such as 120mm thick, more than 2.9m thick, 110mm thick, more than 2.7m thick, 100mm thick, more than 2.5m thick simple support plate, or early disassembly requirement, in step c, a first connecting plate is arranged between two adjacent bottom molds in the middle of the span direction of the first steel bar truss floor support plate, a second connecting plate is arranged between two adjacent bottom molds in the middle of the span direction of the second steel bar truss floor support plate, then a supporting device is arranged below the first connecting plate and the second connecting plate, such as a double-row frame, namely after the first steel bar truss floor support plate and the second steel bar truss floor support plate are installed, the supporting device is arranged, then binding of the first additional rib, the first distribution rib, the second additional rib and the second distribution rib is carried out, and no steel bar truss needs to be arranged above the first connecting plate and the second connecting plate, therefore, even if the field assembly is carried out, the field installation workload is not large, the using amount of the support frames is small, when the strength of the floor slab concrete reaches about 40% -50%, the first bottom die 21 and the second bottom die 22 can be detached, only the support devices, the first connecting plates and the second connecting plates are reserved, and early template detachment is achieved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (9)

1. The construction method of the lifting plate node structure of the steel bar truss floor bearing plate is characterized by comprising the following steps of:
a. processing all steel beams, a first steel bar truss floor bearing plate and a second steel bar truss floor bearing plate in a factory, connecting a supporting plate (4) and a stiffening plate (8) at corresponding positions corresponding to the steel beams, wherein each steel beam comprises a top plate (11), a web plate (12) and a bottom plate (13), the steel bar truss floor deck comprises a bottom die I (21) and a plurality of steel bar trusses I, the steel bar trusses I comprise upper chord steel bars I (51), web member steel bars I (61), lower chord steel bars I (71), support horizontal steel bars I and support vertical steel bars I (101), the second steel bar truss floor support plate comprises a second bottom die (22) and a plurality of second steel bar trusses, the second steel bar truss comprises a second upper chord steel bar (52), a second web member steel bar (62), a second lower chord steel bar (72), a second support horizontal bar and a second support vertical bar (102), the width of the supporting plate (4) is larger than the distance between the outer edge of the corresponding top plate (11) and the web plate (12);
b. mounting the steel beam;
c. installing the first steel bar truss floor bearing plate and the second steel bar truss floor bearing plate, connecting a first support vertical rib (101) to the upper surface of a top plate (11) of the steel beam perpendicular to the length direction of the first steel bar truss, connecting a second support vertical rib (102) to the upper surface of the supporting plate (4) perpendicular to the length direction of the second steel bar truss, wherein a first gap (31) is formed between the end of the first bottom die (21) and the top plates (11) of all the steel beams around, and a second gap (32) is formed between the end of the second bottom die (22) and all the supporting plates (4) around;
d. checking all the gaps I (31) and all the gaps II (32) to ensure that the gaps I (31) and all the gaps II (32) meet preset requirements;
e. binding and attaching a first rib and a first distribution rib in the first steel bar truss floor bearing plate, and binding and attaching a second rib and a second distribution rib in the second steel bar truss floor bearing plate;
f. and pouring concrete to complete the construction of the lifting plate node structure of the steel bar truss floor bearing plate.
2. The construction method according to claim 1, wherein each first support vertical rib (101) is welded with the corresponding top plate (11), each second support vertical rib (102) is welded with the corresponding supporting plate (4), and the overlapping length of the second steel bar truss and the supporting plate (4) is greater than or equal to 50 mm.
3. Construction method according to claim 1, characterised in that the outer ends of the stiffening plates (8) are flush with the outer ends of the corresponding roof plates (11).
4. The construction method according to claim 3, wherein when the height difference between the first steel bar truss floor slab and the second steel bar truss floor slab is smaller than the thickness of the first steel bar truss floor slab, all the stiffening plates (8) on one side provided with the supporting plate (4) are connected to the bottom of the supporting plate (4).
5. The construction method according to claim 1, wherein the steel bar truss floor deck comprises at least two steel bar truss floor deck one units, and the steel bar truss floor deck comprises at least two steel bar truss floor deck two units.
6. The construction method according to any one of claims 1 to 5, wherein when the first steel bar truss floor bearing plate or the second steel bar truss floor bearing plate is a simple plate structure with a plate span of more than 2.5m, a support device is arranged below the middle part of the corresponding first steel bar truss floor bearing plate or below the middle part of the second steel bar truss floor bearing plate between the steps c and d.
7. The construction method according to any one of claims 1 to 5, wherein in step e, the method further comprises the step of extending the additional rib I or the distribution rib I into the second steel bar truss floor slab and binding and connecting the lower chord steel bar II (72).
8. The method of any one of claims 1-5, wherein step e further comprises attaching studs (9) to the top surface of the top plate (11) and the top surface of the pallet (4).
9. The construction method according to any one of claims 1 to 5, wherein when the height difference between the first steel bar truss deck and the second steel bar truss deck is equal to the height of the steel beam, the second support vertical rib (102) is connected to the upper surface of the bottom plate (13) perpendicular to the length direction of the second steel bar truss.
CN201910651513.1A 2019-07-18 2019-07-18 Construction method of lifting plate node structure of steel bar truss floor bearing plate Active CN110284716B (en)

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CN108678417A (en) * 2018-07-31 2018-10-19 天津市建筑设计院 A kind of floor of steel structure transformation node
CN208472974U (en) * 2018-06-04 2019-02-05 浙江中益建材科技有限公司 A kind of steel bar girder plate end connects steel structure girder node structure

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