CN109235222A - Light-duty full assembled great cantilever ultra-high performance concrete index chain and its construction method - Google Patents
Light-duty full assembled great cantilever ultra-high performance concrete index chain and its construction method Download PDFInfo
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- CN109235222A CN109235222A CN201811209740.0A CN201811209740A CN109235222A CN 109235222 A CN109235222 A CN 109235222A CN 201811209740 A CN201811209740 A CN 201811209740A CN 109235222 A CN109235222 A CN 109235222A
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 72
- 238000010276 construction Methods 0.000 title claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 claims 1
- 238000009408 flooring Methods 0.000 description 24
- 238000010586 diagram Methods 0.000 description 6
- 238000011065 in-situ storage Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 230000032258 transport Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000003014 reinforcing effect Effects 0.000 description 5
- 238000004873 anchoring Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 239000004574 high-performance concrete Substances 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009430 construction management Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004540 pour-on Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
轻型全装配式大悬臂超高性能混凝土展翅梁，包括槽形梁、齿形变截面挑梁和波形肋桥面板，槽形梁、齿形变截面挑梁和波形肋桥面板为超高性能混凝土预制构件，槽形梁的腹板顶部外侧面设有与齿形变截面挑梁连接的拼接凹槽，相对拼接凹槽的腹板内侧面设有横隔梁；横隔梁顶部和齿形变截面挑梁的梁顶呈齿状，并预埋用于与桥面板拼接的锚固螺栓；波形肋桥面板采用若干块预制桥面板拼装而成，预制桥面板底部的波形肋与槽形梁和齿形变截面挑梁顶部的齿状相匹配，并预留有螺栓孔；拼接凹槽以及预制桥面板拼接处浇筑有超高性能混凝土形成湿接缝。本发明还公开了该展翅梁的施工方法。该展翅梁外形美观，轻巧而舒展受力性能优异，耐久性可达200年以上，施工简单。
Lightweight fully-assembled large cantilever ultra-high-performance concrete wing beams, including channel beams, toothed section cantilever beams and corrugated rib decks, channel beams, toothed section cantilevers and corrugated rib decks are ultra-high-performance concrete prefabricated components , the outer side of the web top of the trough beam is provided with a splicing groove connected with the tooth-deformed section pick beam, and the inner side of the web plate opposite to the splicing groove is provided with a diaphragm beam; The top of the beam is tooth-shaped, and the anchor bolts for splicing with the bridge deck are embedded in advance; the corrugated rib deck is assembled from several prefabricated decks, and the corrugated rib at the bottom of the prefabricated deck, the channel beam and the tooth-deformed section cantilever beam The teeth at the top match, and bolt holes are reserved; the splicing grooves and the splices of the prefabricated bridge deck are poured with ultra-high-performance concrete to form wet joints. The invention also discloses a construction method of the wing spread beam. The wing beam is beautiful in appearance, lightweight and excellent in stretching and stress performance, with a durability of more than 200 years and simple construction.
Description
Technical field
The present invention relates to technical field of bridge engineering, mixed more particularly, to a kind of light-duty full assembled great cantilever very-high performance
Solidifying soil index chain.
Background technique
Currently, China's major part bridge is all constructed by the way of cast in situs, cast in situs is not required to large-scale rise and resets
Standby, the advantages that construction is steady reliable, bridge integrity is good, but the cast in situs construction period is long, construction management complexity, to periphery
Environment is affected, and another common method of the prefabricated installation as bridge construction, has the construction time compared to cast in situs
Short, the advantages that prefabricated components quality is good, environmental protection and energy saving.But it the transport of prefabricated components and is installed past during prefabricated construction
Toward relatively difficult, to transporting equipment and lifting equipment more demanding, cost also therefore increase.It can be seen that in prefabricated installation
Light-duty full fabricated construction is necessary in construction.
The lightness of prefabricated components can be realized by using the methods of new material, the reasonable structure type of design.
Ultra-high performance concrete (UHPC, Ultra High Performance Concrete) is all remote in mechanical property and durability
It is better than normal concrete, under with identical bending resistance, the weight of UHPC structure is only the 1/2 of reinforced concrete structure, will
UHPC, which applies to bridge structure, can reduce the thickness of structure, mitigates the self weight of structure significantly, keeps prefabricated components lighter and handier.This
Outside, that the superstructure of bridge is divided into several parts difference is prefabricated, then various pieces assembly is got up, and can reduce transport and hang
The difficulty of dress, while simplifying Mold Making and demoulding process.When prefabricated components in this way, the splicing of each section component
Most important, splicing must be rationally reliable.
The present invention towards China's capital construction growth requirement, start with by the defect existing for the cast in situs and prefabricated installation, with
It shortens the construction period, improves architecture quality, mitigate dead load, reduce transport and hoisting cost etc. as target, propose a kind of light-duty
Full assembled great cantilever UHPC index chain.Structure of the invention is superior in quality, splicing is reliable, and stress performance, endurance quality are good, applies
Work is convenient, can greatly shorten duration, good appearance and saving space under bridge, be adapted to very much the needs of development.
Summary of the invention
The technical problem to be solved by the present invention is it is simple to overcome the deficiencies of the prior art and provide a kind of structure, easily assemble,
The good light-duty full assembled great cantilever ultra-high performance concrete index chain of overall performance after splicing.
The technical solution adopted by the present invention to solve the technical problems is:
Light-duty full assembled great cantilever ultra-high performance concrete index chain, including beam channel, tooth form variable cross-section outrigger and wave rib
Floorings, the beam channel, tooth form variable cross-section outrigger and wave rib floorings are ultra-high performance concrete (UHPC) prefabricated components,
The web top outside of the beam channel is equipped with the splicing groove connecting with tooth form variable cross-section outrigger, the opposite abdomen for splicing groove
Plate medial surface is equipped with diaphragm；It is in dentation at the top of diaphragm, and the pre-buried anchor bolt for splicing with floorings；The tooth form
The back of variable cross-section outrigger is in dentation, and the pre-buried anchor bolt for splicing with floorings；The wave rib floorings use
Several pieces of prefabricated bridges are assembled, wave rib and the dentation phase at the top of beam channel and tooth form variable cross-section outrigger of bottom
Match, and is reserved with bolt hole in the position of corresponding beam channel and the pre-buried anchor bolt of tooth form variable cross-section outrigger；The bolt hole exists
Anchor bolt after-pouring ultra-high performance concrete (UHPC) grouting material, the splicing groove and prefabricated bridge stitching portion are installed
It has poured ultra-high performance concrete (UHPC) and has formed wet seam.
On beam channel splice groove along indulge bridge to two concave surfaces be equipped with beam channel protruding bar, along the concave surface of direction across bridge
The pre-buried connection bolt for splicing with tooth form variable cross-section outrigger.
The beam channel and tooth form variable cross-section outrigger stitching portion are equipped with along the end face of direction across bridge for being laid with transverse prestress
The prestress hole of reinforcing bar.
The cross sectional dimensions of tooth form variable cross-section outrigger is gradually reduced to the direction far from beam channel.
The root stitching portion two sides of tooth form variable cross-section outrigger are equipped with L-type angle steel, along vertical bridge to overhanging outrigger protruding bar
It is welded across steel plate and with steel plate.
The construction method of light-duty full assembled great cantilever ultra-high performance concrete index chain, comprising the following steps:
1) factory-made component: beam channel, tooth form variable cross-section outrigger and prefabricated bridge carry out prefabricated in factory；
2) beam channel is installed, after beam channel installation is in place, tooth form variable cross-section outrigger is hung to splicing groove splicing tooth form and is become
The connection bolt of stitching portion is passed through steel plate hole and tightened by section outrigger；Beam channel protruding bar and outrigger protruding bar are overlapped,
UHPC is poured again and fills up splicing groove, and after wet seam reaches the intensity of design requirement, tensioning tooth form variable cross-section outrigger is laterally pre-
Stress reinforcing bar；
3) after the completion of the splicing of tooth form variable cross-section outrigger, piecemeal installs prefabricated bridge, is aligned anchor bolt and bolt hole, then
Bolt hole is filled with UHPC grouting material, the anchor bolt between floorings and beam channel, tooth form variable cross-section outrigger is tightened, pours bridge floor
The wet seam of plate UHPC.
The light-duty full assembled great cantilever ultra-high performance concrete index chain of the present invention the utility model has the advantages that
Index chain monnolithic case is beautiful, lightly unfolds, and beam channel, tooth form variable cross-section outrigger and wave rib floorings use UHPC
Prefabricated components, it is more frivolous due to doing each component using UHPC, since the compression strength of UHPC, tension are strong
Degree, toughness and durability are all much larger than normal concrete and high performance concrete, and the stress performance of index chain entirety is excellent, durable
Property was up to 200 years or more.
The variable cross-section tooth form outrigger of great cantilever can effectively increase under-clearance, can effectively mitigate superstructure self weight, reduce
The engineering quantity of substructure reduces the size of substructure, very saving space under bridge, and construction aspect is superior in addition
Property, the development need of capital construction can be met, strong applicability can be widely used in different types of rridges.
At the top of diaphragm in the wave rib and beam channel of wave rib floorings bottom and tooth form variable cross-section outrigger back
Dentation matches, and increases the contact area of wave rib floorings and beam channel, tooth form variable cross-section outrigger, by anchor bolt plus
Bonding strength between strong three, significantly improves the stress performance and stability of index chain entirety.
The design of the splicing construction of beam channel and tooth form variable cross-section outrigger is simple and reliable, by using transverse prestress steel
Muscle, angle splice joint are hardened to close pre-embedded bolt, overlap joint reinforcing bar and the wet seam of UHPC for splicing after-pouring, enhances beam channel and tooth
The reliability of deformation section outrigger stitching portion, and it is convenient for the splicing and construction of prefabricated components.
Structure is divided into beam channel by the convenient and quick construction of light-duty full assembled great cantilever UHPC index chain, tooth form change is cut
The multiple portions such as face outrigger and wave rib floorings difference is prefabricated, transports and installs, and is reduced while ensuring quality to fortune
Defeated and hanging device requirement, alleviates the pressure of transport and lifting, and construction site only needs to pour on a small quantity to the utmost
Wet seam, assembled process is convenient, can greatly shorten the duration.
The construction method of the light-duty full assembled great cantilever ultra-high performance concrete index chain of the present invention the utility model has the advantages that
Compared with cast in situs, the construction time of the invention is shorter, construction quality is higher, construction site is safer, more environmentally-friendly section
Energy, architecture quality are more preferable；Compared with integrated precast, the transport and installation of prefabricated components of the present invention are simpler, and work progress is more
Safety, and do not need Large-scale Hoisting equipment.
Detailed description of the invention
Fig. 1-is a kind of structural schematic diagram of light-duty full assembled great cantilever ultra-high performance concrete index chain；
Fig. 2-is index chain transverse sectional view in Fig. 1；
Fig. 3-is the three-dimensional structure diagram of UHPC beam channel in Fig. 1；
Fig. 4-is the three-dimensional structure diagram of tooth form variable cross-section UHPC outrigger in Fig. 1；
Fig. 5-is the three-dimensional structure diagram of wave rib UHPC floorings in Fig. 1；
Fig. 6-is the three-dimensional enlarged diagram of UHPC beam channel and tooth form variable cross-section UHPC outrigger stitching portion；
Fig. 7-is the front schematic view of UHPC beam channel and tooth form variable cross-section UHPC outrigger stitching portion；
Fig. 8-is the side schematic view of UHPC beam channel and tooth form variable cross-section UHPC outrigger stitching portion；
Fig. 9-is the schematic top plan view of UHPC beam channel and tooth form variable cross-section UHPC outrigger stitching portion；
Figure 10-is the enlarged diagram at wave rib UHPC floorings and tooth form variable cross-section UHPC outrigger bolt anchoring.
In figure: 1-beam channel, 2-tooth form variable cross-section outriggers, 3-wave rib floorings, 4-diaphragms, 5-splicings are recessed
Slot, the 6-outriggers splicing wet seam of UHPC, 7-transverse prestressed reinforcing steel bars, 8-anchor bolts, the 9-wet seams of floorings UHPC,
10-outrigger protruding bars, 11-beam channel protruding bars, at 12-bar splicings, 13-connection bolts, 14-prestress holes,
15-L-type angle steel, 16-bolts hole, 17-UHPC grouting materials.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and embodiments.
Embodiment
Referring to Fig.1 ~ 10: light-duty full assembled great cantilever ultra-high performance concrete index chain, including beam channel 1, tooth form become
Section outrigger 2 and wave rib floorings 3, the beam channel 1, tooth form variable cross-section outrigger 2 and wave rib floorings 3 are very-high performance
Concrete (UHPC) prefabricated components, the web top outside of the beam channel 1 are equipped with the spelling connecting with tooth form variable cross-section outrigger 2
Groove 5 is connect, the opposite web medial surface for splicing groove 5 is equipped with diaphragm 4；It is in dentation at the top of diaphragm 4, and pre-buried is used for and bridge
The anchor bolt 8 of panel splicing；The back of the tooth form variable cross-section outrigger 2 is in dentation, and pre-buried for splicing with floorings
Anchor bolt 8；The wave rib floorings 3 are assembled using several pieces of prefabricated bridges, the wave rib and flute profile of bottom
The dentation at 2 top of beam 1 and tooth form variable cross-section outrigger matches, and in corresponding beam channel 1 and the pre-buried anchoring of tooth form variable cross-section outrigger 2
The position of bolt 8 is reserved with bolt hole 16；The bolt hole 16 is in installation 8 after-pouring ultra-high performance concrete of anchor bolt
(UHPC) grouting material, the splicing groove 5 and prefabricated bridge stitching portion have poured ultra-high performance concrete (UHPC) formation
Outrigger splices the wet seam 6 of UHPC and the wet seam 9 of floorings UHPC.
On beam channel 1 splice groove 5 along vertical bridge to two concave surfaces be equipped with beam channel protruding bar 11, along direction across bridge
The pre-buried connection bolt 13 for splicing with tooth form variable cross-section outrigger 2 in concave surface.
The beam channel 1 and 2 stitching portion of tooth form variable cross-section outrigger are equipped with along the end face of direction across bridge laterally answers in advance for being laid with
The prestress hole 14 of power reinforcing bar 7.
The cross sectional dimensions of tooth form variable cross-section outrigger 2 is gradually reduced to the direction far from beam channel 1.
The root stitching portion two sides of tooth form variable cross-section outrigger 2 are equipped with L-type angle steel 15, along vertical bridge to the overhanging overhanging steel of outrigger
Muscle 10 passes through steel plate and welds with steel plate.
Beam channel 1, tooth form variable cross-section outrigger 2 and wave rib floorings 3 use UHPC prefabricated components, due to using UHPC
Each component is done more frivolous, index chain monnolithic case is beautiful, lightly unfolds；Due to the compression strength of UHPC,
Tensile strength and toughness are all much larger than normal concrete and high performance concrete, and the stress performance of index chain entirety is excellent, durable
Property was up to 200 years or more.
The variable cross-section tooth form outrigger of great cantilever can effectively increase under-clearance, can effectively mitigate superstructure self weight, reduce
The engineering quantity of substructure reduces the size of substructure, very saving space under bridge, and construction aspect is superior in addition
Property, the development need of capital construction can be met, strong applicability can be widely used in different types of rridges.
The wave rib of 3 bottom of wave rib floorings and 4 top of diaphragm and 2 beam of tooth form variable cross-section outrigger in beam channel 1
The dentation on top matches, and increases the contact area of wave rib floorings 3 and beam channel 1, tooth form variable cross-section outrigger 2, passes through anchor
Fixing bolt 8 strengthens the bonding strength between three, significantly improves the compression strength, tensile strength, toughness of index chain entirety
And stability.
The design of the splicing construction of beam channel 1 and tooth form variable cross-section outrigger 2 is simple and reliable, by using transverse prestress steel
Muscle 7, angle splice joint are hardened to close pre-embedded bolt, overlap joint reinforcing bar and the wet seam of UHPC for splicing after-pouring, enhances 1 He of beam channel
The stress intensity of 2 stitching portion of tooth form variable cross-section outrigger, and it is convenient for the splicing and construction of prefabricated components.
The construction method of light-duty full assembled great cantilever ultra-high performance concrete index chain, comprising the following steps:
1) factory-made component: the prefabricated components such as beam channel 1, tooth form variable cross-section outrigger 2 and prefabricated bridge carry out prefabricated in factory
It is spare；
2) beam channel 1 is installed, after beam channel 1 is installed in place, tooth form variable cross-section outrigger 2 is hung at splicing groove 5 and splices tooth
The connection bolt 13 of stitching portion is passed through steel plate hole and tightened by deformation section outrigger 2；Overlap beam channel protruding bar 11 and outrigger
12) protruding bar 10(is as shown in fig. 7, form at bar splicing, then pour UHPC and fill up splicing groove 5, to outrigger splicing UHPC
Transverse prestressed reinforcing steel bar 7 after wet seam 6 reaches the intensity of design requirement, in tensioning tooth form variable cross-section outrigger 2；
3) after the completion of the splicing of tooth form variable cross-section outrigger 2, piecemeal installs prefabricated bridge, is aligned anchor bolt 8 and bolt hole 16,
Then bolt hole 16 is filled with UHPC grouting material 17, tightens the anchoring spiral shell between floorings and beam channel 1, tooth form variable cross-section outrigger 2
Bolt 8 pours the wet seam 9 of floorings UHPC.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811209740.0A CN109235222B (en) | 2018-10-17 | 2018-10-17 | Lightweight fully assembled large cantilever ultra-high performance concrete wing beam and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811209740.0A CN109235222B (en) | 2018-10-17 | 2018-10-17 | Lightweight fully assembled large cantilever ultra-high performance concrete wing beam and its construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109235222A true CN109235222A (en) | 2019-01-18 |
| CN109235222B CN109235222B (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811209740.0A Active CN109235222B (en) | 2018-10-17 | 2018-10-17 | Lightweight fully assembled large cantilever ultra-high performance concrete wing beam and its construction method |
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Cited By (4)
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| CN112593482A (en) * | 2020-12-04 | 2021-04-02 | 邹宇 | Prefabricated assembled concrete diaphragm structure and construction method |
| CN113481817A (en) * | 2021-08-12 | 2021-10-08 | 安徽省交通控股集团有限公司 | Construction method of bone type high-performance concrete segment assembled composite beam bridge |
| CN113789854A (en) * | 2021-09-03 | 2021-12-14 | 湖南大学 | A fully assembled beam-column joint based on groove-shaped UHPC splicing member and its manufacturing method |
| CN114481842A (en) * | 2021-12-31 | 2022-05-13 | 安徽省公路桥梁工程有限公司 | Large cantilever steel spine beam auxiliary splicing device and construction method thereof |
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| CN113789854A (en) * | 2021-09-03 | 2021-12-14 | 湖南大学 | A fully assembled beam-column joint based on groove-shaped UHPC splicing member and its manufacturing method |
| CN114481842A (en) * | 2021-12-31 | 2022-05-13 | 安徽省公路桥梁工程有限公司 | Large cantilever steel spine beam auxiliary splicing device and construction method thereof |
| CN114481842B (en) * | 2021-12-31 | 2023-12-08 | 安徽省公路桥梁工程有限公司 | Large cantilever steel backbone beam auxiliary splicing device and construction method thereof |
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| Publication number | Publication date |
|---|---|
| CN109235222B (en) | 2020-04-14 |
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