CN204940652U - Large-span prestressed site prefabrication arch bar - Google Patents
Large-span prestressed site prefabrication arch bar Download PDFInfo
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- CN204940652U CN204940652U CN201520706130.7U CN201520706130U CN204940652U CN 204940652 U CN204940652 U CN 204940652U CN 201520706130 U CN201520706130 U CN 201520706130U CN 204940652 U CN204940652 U CN 204940652U
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- prestressing force
- lower edge
- median septum
- plate
- surface plate
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- 238000009417 prefabrication Methods 0.000 title claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 35
- 239000010959 steel Substances 0.000 claims abstract description 35
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 16
- 230000002787 reinforcement Effects 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 8
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000004873 anchoring Methods 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 210000003205 muscle Anatomy 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 17
- 230000003014 reinforcing effect Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- 239000011120 plywood Substances 0.000 description 7
- 238000009415 formwork Methods 0.000 description 5
- 241000743339 Agrostis Species 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 210000002435 tendon Anatomy 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 210000003141 lower extremity Anatomy 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000009416 shuttering Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
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- Reinforcement Elements For Buildings (AREA)
Abstract
The utility model relates to a kind of large-span prestressed site prefabrication arch bar, primarily of the curved slab that winds up, lower edge prestressing force surface plate, median septum and brace composition; The curved slab that winds up is parabolic trough plate; Lower edge prestressing force surface plate is prestressing force groove type plate, and presstressed reinforcing steel is fixed by the anchor slab on pedestal; The connecting elements of curved slab and lower edge prestressing force surface plate of winding up is median septum, median septum upper and lower end arranges reserved anchor bar and anchors into and wind up in curved slab and lower edge prestressing force surface plate, median septum left and right side is embedded with sleeve pipe, insert connecting reinforcement in the middle of sleeve pipe, connecting reinforcement through wind up curved slab and lower edge prestressing force surface plate by steel plate bolt anchoring; The curved slab that winds up is provided with built-in fitting with the junction of lower edge prestressing force surface plate and is connected with collar tie beam.The structure that the utility model relates to have safe and reliable, stability is strong, efficiency of construction is high, the features such as the site prefabrication requirement of arch roof truss in enormous quantities can be adapted to, there is good economic technology benefit.
Description
Technical field
The utility model relates to large-span prestressed site prefabrication arch bar, particularly grain depot large-span prestressed arch bar site prefabrication structure.
Technical background
Large-span prestressed arch roof truss by winding up, lower edge and the large component of vertical web three form.Upper and lower chord member is grooved tabular, and the median septum that upper and lower string links is the concrete hollow precast plate of a rectangle mount structure.This form of structure roof panel and roof truss are combined as a whole, makes this roof system have overall performance good, lightweight, and anti-seismic performance is good, can load-bearing, again can thermal insulation, has now been widely used in the construction of large granary.Because large-span prestressed arch bar span is comparatively large, transport inconvenience, therefore the general mode adopting site prefabrication.
Large-span prestressed arch bar is a kind of thin-walled plate profile structure, and require that arch bar winds up arch face radian unanimously, formwork erection difficulty is larger.The scaffold support system that traditional form work engineering adopts is for arrange three standpipes every 2m, core lumps of wood skeleton top edge does camber by full size full-page proof, base is in line, each block all will finish number, this technique uses steel pipe quantity large, template mounting or dismounting are more difficult, and lumps of wood skeleton easily misplaces.In the installation process of median septum, after median septum is made, directly anchored into by reserved anchor bar and wind up in curved slab and lower edge prestressed slab, Nodes does not do strengthens process, easily has an impact to the globality of structure.
Given this, need a kind of speed of application of invention at present badly fast, realize the grain depot large-span prestressed arch bar site prefabrication structure that large-span prestressed arch roof truss fast, is accurately constructed.
Summary of the invention
The purpose of this utility model is to provide a kind of easy construction, meets the formwork needs of curved slab arc requirement of winding up, can strengthen median septum node, realizes the structure that the on-the-spot batch of large-span prestressed arch bar is prefabricated.
For achieving the above object, the utility model have employed following technical scheme:
Large-span prestressed site prefabrication arch bar, is characterized in that: described structure is primarily of the curved slab that winds up, lower edge prestressing force surface plate, median septum and brace composition; The curved slab that winds up is parabolic trough plate; Lower edge prestressing force surface plate is prestressing force groove type plate, and presstressed reinforcing steel is fixed by the anchor slab on pedestal; The connecting elements of curved slab and lower edge prestressing force surface plate of winding up is median septum, median septum is the concrete hollow precast plate of a rectangle mount structure, median septum upper and lower end arranges reserved anchor bar and anchors into and wind up in curved slab and lower edge prestressing force surface plate, median septum left and right side is embedded with sleeve pipe, insert connecting reinforcement in the middle of sleeve pipe, connecting reinforcement through wind up curved slab and lower edge prestressing force surface plate by steel plate bolt anchoring; The curved slab that winds up is provided with built-in fitting with the junction of lower edge prestressing force surface plate and is connected with collar tie beam.
Further, the plate end place of arch roof truss is embedded with steel plate and reserving hole, and make the built-in fitting on collar tie beam pass plate end, collar tie beam and plate end adopt bolt to weld and be connected.
Median septum is banded with structure muscle with the curved slab that winds up, lower edge prestressing force surface plate junction.
The construction method of installation of above-mentioned large-span prestressed site prefabrication arch bar, comprises the following steps:
1) presstressed reinforcing steel is arranged: at prefabricated place setting table seat, determining table pier, table top and location-plate size; Table top builds 100 thick C30 concrete base layers, and concrete base layer lays plastic sheeting, and presstressed reinforcing steel is arranged by anchor slab;
2) median septum is prefabricated: median septum is the concrete hollow precast plate of a rectangle mount structure, and the on-the-spot lay-up method that adopts is prefabricated, and median septum upper and lower side reserves anchor bar, left and right sides service sleeve;
3) shuttering supporting is installed: the support of template adopts steel pipe framed bent combining form, and the vertical steel pipe spacing 2m of framed bent is arranged near median septum, and steel pipe top is bending and weld with each vertical steel pipe by the roof truss radian of curved plate that winds up; An arch cover adopts two welding framed bents, and centre steel tube fastener is taken tightly, and the distance between two welding framed bent steel pipes is the width of roof truss;
4) curved slab that winds up makes: the every block 2m of the curved slab side form that winds up, and beats diameter 6mm hole, wait until and be connected with beam bottom board along side form lower limb arc; Core panel nine plywood make, and core two ends nine plywood is beaten diameter 6mm hole, waits until and be connected with median septum template; Make beam bottom board with the wide wooden model of 100mm, the curved circular of bed die makes according to the curved line of beam side and core, finally binds reinforcing bar concreting;
5) median septum is installed: prefabricated median septum is pressed orientation axis and place, and the anchor bar that median septum two ends are reserved anchors in the plate of upper and lower string with in rib; Intert reinforcing bar in median septum service sleeve, reinforcing bar is through curved slab and the lower edge prestressing force surface plate of winding up, and after upper and lower string concreting, it is tight that the reinforcing bar bolt stretched out carries out anchor; Median septum constructs muscle with the curved slab that winds up, lower edge prestressing force surface plate junction by detailing requiments colligation, reserved brace; Before concreting, rush hair machine with high pressure dabbing process is carried out to median septum lower edges concrete surface;
6) lower edge prestressing force surface plate prestressed slab makes: scrape with concrete surface inside lower edge prestressed slab template, and the inboard mould of lower edge forms at median septum contact place by 2 pieces of templates respectively, with nine plywood of wide 100mm, is connected by two pieces of inboard moulds; Then colligation lower edge reinforcing bar, by tension of prestressed tendon after-pouring concrete, finally puts presstressed reinforcing steel, welding brace;
7) tension of prestressed tendon: the presstressed reinforcing steel of lower edge prestressing force surface plate adopts pre-tensioning system and post stretching combination, pre-tensioning system is adopted time prefabricated, then in service sleeve spaced apart, reinforcing bar is inserted, to the reinforced bar stretching in sleeve pipe after arch bar lifting, and be connected with the built-in fitting on collar tie beam;
8) arch roof truss lifting: clear up collar tie beam top and arch bar, after the arch bar demoulding, adopts 4 the suspension ring place liftings of double-machine lifting crane method; After arch bar correction is in place, welded by arch bar with the built-in fitting on collar tie beam, welding should in the welding simultaneously of arch bar diagonal.
The upper end of steel pipe framed bent is form with the steel-pipe welding of curved slab with radian that wind up, and each pad is at a distance of 2m.
the utility model has following feature and beneficial effect:
(1) roof truss adopts the curved slab that winds up, and lower edge prestressed slab, the form of structure of intermediate arrangement median septum, reaches the effect alleviating deadweight, antidetonation, insulation.
(2) support of template adopts the combination of steel pipe framed bent, and framed bent top steel pipe bends and the mode of welding with each vertical steel pipe by the roof truss radian of curved plate that winds up, the effect achieving convenient disassembly, reduce steel pipe consumption, reduce operation.
(3) median septum is before arch roof truss construction, can producing by independent field lamination, without the need to building in work progress, not affecting the duration, improve efficiency of construction.
(4) median septum adopts service sleeve to intert reinforcing bar, last and upper and lower string prestressing force surface plate bolt carries out the tight mode of anchor, and the form that lower edge prestressing force surface plate presstressed reinforcing steel adopts pre-tensioning system and post stretching to combine, all serve and strengthen node connection, strengthen the object of structural integrity.
(5) lower edge prestressing force surface plate presstressed reinforcing steel adopts pre-tensioning system and post stretching combination, pre-tensioning system is adopted time prefabricated, then in service sleeve spaced apart, insert reinforcing bar, to the reinforced bar stretching in sleeve pipe after arch bar lifting, and be connected with the built-in fitting on collar tie beam.These joint structures strengthen stability and the anti-seismic performance of node strength and roof truss entirety greatly.
Accompanying drawing explanation
Fig. 1 is large-span prestressed arch bar plan view;
Fig. 2 is large-span prestressed arch bar site prefabrication elevation;
Fig. 3 is formwork and formwork supports figure;
Fig. 4 is median septum figure;
Fig. 5 is median septum connection detail;
Fig. 6 is the utility model construction flow chart;
In figure: 1. vertical wall; 2. collar tie beam; 3. wind up curved slab; 4. lower edge prestressing force surface plate; 5. bolt; 6. steel plate; 7. service sleeve; 8. median septum; 9. brace; 10. suspension ring; 11. built-in fittings; 12. pedestals; 13. anchor slabs; 14. presstressed reinforcing steels; 15. concrete base layers; 16. lumps of wood; 17. steel pipe framed bents; 18. plastic sheetings; 19. reserved braces; 20. connecting reinforcements; 21. reserved anchor bars; 22. structure muscle.
Detailed description of the invention
Present embodiment emphasis sets forth the embodiment that the utility model relates to structure.
Fig. 1, Fig. 2 are grain depot large-span prestressed arch bar plan view and large-span prestressed arch bar site prefabrication elevation respectively.As shown in the figure, structure forms primarily of the curved slab 3 that winds up, lower edge prestressing force surface plate 4, median septum 8 and brace 9; Wind up curved slab 3 for parabolic trough plate; Lower edge prestressing force surface plate 4 is prestressing force groove type plate, and presstressed reinforcing steel 14 is fixed by the anchor slab 13 on pedestal 12; The connecting elements of curved slab 3 and lower edge prestressing force surface plate 4 of winding up is median septum 8, median septum 8 is the concrete hollow precast plate of a rectangle mount structure, median septum 8 upper and lower end arranges reserved anchor bar 21 and anchors into the curved slab 3 that winds up with lower edge prestressing force surface plate 4, median septum left and right side is embedded with sleeve pipe 7, insert connecting reinforcement 20 in the middle of sleeve pipe 7, connecting reinforcement 20 through the curved slab 3 that winds up with lower edge prestressing force surface plate 4 by the anchoring of steel plate 6 bolt 5; The curved slab 3 that winds up is provided with built-in fitting 11 with the junction of lower edge prestressing force surface plate 4 and is connected with collar tie beam 2.
Before large-span prestressed arch roof truss is prefabricated, with reference to shown in Fig. 2, first cast stretching bed seat 12, table top lays 100 thick C30 concrete base layers 15, and cement mortar screeding receives light.Paving plastic film 18 on concrete base layer 15.Anchor slab 13 on pedestal 12 positions presstressed reinforcing steel 14 according to the thickness of concrete cover of presstressed reinforcing steel and rebar spacing etc.
With reference to shown in Fig. 3, the support of template adopts steel pipe framed bent 17, and the vertical steel pipe spacing of framed bent is 2m, is arranged near median septum 8, and the highest dividing plate place, centre arranges two steel pipes, and steel pipe top is bending and weld with each vertical steel pipe by the roof truss radian of curved plate that winds up.An arch cover adopts two welding framed bents, and centre steel tube fastener is taken tightly, and the distance between two welding framed bent steel pipes is the width of roof truss.
With reference to shown in Fig. 4 and Fig. 5, the median septum 8 scene being shifted to an earlier date lamination production positions installation, and anchor bar 21 is reserved at median septum about 8 two ends, two ends, left and right service sleeve 7, and anchor bar 21 must spot welding.Median septum 8 constructs muscle 22 with the curved slab 3 that winds up, lower edge prestressing force surface plate 4 junction by detailing requiments colligation, reserved brace 19.Before concreting, rush hair machine with high pressure carry out dabbing process to median septum 8 lower edges concrete surface, last node is trapezoidal configuration.Intert connecting reinforcement 20 in median septum 8 service sleeve 7, when installing median septum 8, connecting reinforcement is through the curved slab that winds up, lower edge prestressing force surface plate, and after the curved slab that winds up, the concreting of lower edge prestressing force surface plate, to add upper steel plate 6 tight by bolt 5 anchor on both sides.
With reference to shown in Fig. 3, after placing the lumps of wood 16, install the side form of the curved slab 3 that winds up, horizontal range is 2m, and top edge makes arc according to roof truss full size full-page proof, and base is in line.Side form beats diameter 6mm hole along lower limb arc every 150mm, waits until and is connected with beam bottom board.Scrape with concrete surface inside lower edge prestressed slab 4 template, the inboard mould of lower edge is made up of two pieces of templates, at median septum 8 contact place, with nine plywood of wide 100mm, is connected by two pieces of inboard moulds.
With reference to shown in Fig. 1, collar tie beam 2 top and arch bar are cleared up, after the arch bar demoulding, adopt 4 the suspension ring 10 place liftings of double-machine lifting crane method.After arch bar correction is in place, the post-tensioning reinforced bar stretching spaced apart to lower edge prestressing force surface plate, finally welds arch bar with the built-in fitting 11 on collar tie beam, and welding should in the welding simultaneously of arch bar diagonal.
Fig. 6 is the utility model construction flow chart; The construction method of grain depot large-span prestressed arch bar site prefabrication structure, comprises the following steps:
1) presstressed reinforcing steel is arranged: at prefabricated place setting table seat 12, determining table pier, table top and location-plate size; Table top builds 100 thick C30 concrete base layers 15, and concrete base layer 15 is laid plastic sheeting 18, presstressed reinforcing steel 14 is arranged by anchor slab 13;
2) median septum is prefabricated: median septum 8 is the concrete hollow precast plate of a rectangle mount structure, and the on-the-spot lay-up method that adopts is prefabricated, and median septum 8 upper and lower side reserves anchor bar 21, left and right sides service sleeve 7;
3) shuttering supporting is installed: the support of template adopts steel pipe framed bent 17 combining form, and the vertical steel pipe spacing 2m of framed bent is arranged near median septum, and steel pipe top is bending and weld with each vertical steel pipe by the roof truss radian of curved plate that winds up; An arch cover adopts two welding framed bents, and centre steel tube fastener is taken tightly, and the distance between two welding framed bent steel pipes is the width of roof truss;
4) curved slab that winds up makes: the every block 2m of the curved slab side form that winds up, and beats diameter 6mm hole, wait until and be connected with beam bottom board along side form lower limb arc; Core panel nine plywood make, and core two ends nine plywood is beaten diameter 6mm hole, waits until and be connected with median septum template; Make beam bottom board with the wide wooden model of 100mm, the curved circular of bed die makes according to the curved line of beam side and core, finally binds reinforcing bar concreting;
5) median septum is installed: prefabricated median septum 8 is pressed orientation axis and place, and the anchor bar 21 that median septum 8 two ends are reserved anchors in the plate of upper and lower string with in rib; Intert connecting reinforcement 20 in median septum service sleeve 7, connecting reinforcement is through curved slab 3 and the lower edge prestressing force surface plate 4 of winding up, and after upper and lower string concreting, it is tight that the reinforcing bar bolt stretched out carries out anchor; Median septum constructs muscle 22 with the curved slab that winds up, lower edge prestressing force surface plate junction by detailing requiments colligation, buries reserved brace 19 underground; Before concreting, rush hair machine with high pressure dabbing process is carried out to median septum lower edges concrete surface;
6) lower edge prestressing force surface plate prestressed slab makes: scrape with concrete surface inside lower edge prestressed slab template, and the inboard mould of lower edge forms at median septum contact place by 2 pieces of templates respectively, with nine plywood of wide 100mm, is connected by two pieces of inboard moulds; Then colligation lower edge reinforcing bar, by tension of prestressed tendon after-pouring concrete, finally puts presstressed reinforcing steel, welding brace 9;
7) tension of prestressed tendon: the presstressed reinforcing steel 14 of lower edge prestressing force surface plate 4 adopts pre-tensioning system and post stretching combination, pre-tensioning system is adopted time prefabricated, then in service sleeve spaced apart, reinforcing bar is inserted, to the reinforced bar stretching in sleeve pipe after arch bar lifting, and be connected with the built-in fitting on collar tie beam;
8) arch roof truss lifting: clear up collar tie beam 2 top and arch bar, after the arch bar demoulding, adopts 4 the suspension ring place liftings of double-machine lifting crane method; After arch bar correction is in place, welded by arch bar with the built-in fitting on collar tie beam, welding should in the welding simultaneously of arch bar diagonal.
Claims (3)
1. large-span prestressed site prefabrication arch bar, is characterized in that: structure is primarily of the curved slab that winds up, lower edge prestressing force surface plate, median septum and brace composition; The curved slab that winds up is parabolic trough plate; Lower edge prestressing force surface plate is prestressing force groove type plate, and presstressed reinforcing steel is fixed by the anchor slab on pedestal; The connecting elements of curved slab and lower edge prestressing force surface plate of winding up is median septum, median septum is the concrete hollow precast plate of a rectangle mount structure, median septum upper and lower end arranges reserved anchor bar and anchors into and wind up in curved slab and lower edge prestressing force surface plate, median septum left and right side is embedded with sleeve pipe, insert connecting reinforcement in the middle of sleeve pipe, connecting reinforcement through wind up curved slab and lower edge prestressing force surface plate by steel plate bolt anchoring; The curved slab that winds up is provided with built-in fitting with the junction of lower edge prestressing force surface plate and is connected with collar tie beam.
2. large-span prestressed site prefabrication arch bar according to claim 1, is characterized in that: the plate end place of arch roof truss is embedded with steel plate and reserving hole, and make the built-in fitting on collar tie beam pass plate end, collar tie beam and plate end adopt bolt to weld and be connected.
3. large-span prestressed site prefabrication arch bar according to claim 1, is characterized in that: median septum is banded with structure muscle with the curved slab that winds up, lower edge prestressing force surface plate junction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520706130.7U CN204940652U (en) | 2015-09-11 | 2015-09-11 | Large-span prestressed site prefabrication arch bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520706130.7U CN204940652U (en) | 2015-09-11 | 2015-09-11 | Large-span prestressed site prefabrication arch bar |
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| Publication Number | Publication Date |
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| CN204940652U true CN204940652U (en) | 2016-01-06 |
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| CN201520706130.7U Expired - Fee Related CN204940652U (en) | 2015-09-11 | 2015-09-11 | Large-span prestressed site prefabrication arch bar |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105220808A (en) * | 2015-09-11 | 2016-01-06 | 杭州江润科技有限公司 | Large-span prestressed arch bar site prefabrication construction method of installation |
| CN108301547A (en) * | 2018-02-24 | 2018-07-20 | 佛山市知而行信息科技有限公司 | Preparation method without beam arched roof panel |
| CN110725555A (en) * | 2018-07-16 | 2020-01-24 | 中铁二十五局集团第二工程有限公司 | Prefabricated roof truss hoisting correction method |
-
2015
- 2015-09-11 CN CN201520706130.7U patent/CN204940652U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105220808A (en) * | 2015-09-11 | 2016-01-06 | 杭州江润科技有限公司 | Large-span prestressed arch bar site prefabrication construction method of installation |
| CN105220808B (en) * | 2015-09-11 | 2018-01-16 | 杭州江润科技有限公司 | Large-span prestressed arch bar in-situ precast construction method of installation |
| CN108301547A (en) * | 2018-02-24 | 2018-07-20 | 佛山市知而行信息科技有限公司 | Preparation method without beam arched roof panel |
| CN110725555A (en) * | 2018-07-16 | 2020-01-24 | 中铁二十五局集团第二工程有限公司 | Prefabricated roof truss hoisting correction method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160106 |