CN110241714A - A kind of Self-resetting precast assembly bridge pier and its construction method - Google Patents
A kind of Self-resetting precast assembly bridge pier and its construction method Download PDFInfo
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- CN110241714A CN110241714A CN201910628393.3A CN201910628393A CN110241714A CN 110241714 A CN110241714 A CN 110241714A CN 201910628393 A CN201910628393 A CN 201910628393A CN 110241714 A CN110241714 A CN 110241714A
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- shear connector
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- outer tube
- stick
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- 238000010276 construction Methods 0.000 title claims abstract description 26
- 210000002435 tendon Anatomy 0.000 claims abstract description 45
- 239000002184 metal Substances 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000004567 concrete Substances 0.000 claims abstract description 15
- 238000010008 shearing Methods 0.000 claims abstract description 9
- 239000003822 epoxy resin Substances 0.000 claims description 8
- 229920000647 polyepoxide Polymers 0.000 claims description 8
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 7
- 239000011150 reinforced concrete Substances 0.000 claims description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000000839 emulsion Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 210000003205 muscle Anatomy 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 239000011083 cement mortar Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000011178 precast concrete Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 238000003466 welding Methods 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
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- 238000010586 diagram Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
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- 229910052737 gold Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The embodiment of the invention provides a kind of Self-resetting precast assembly bridge piers, comprising: cushion cap (1), column (22), prefabricated bent cap (3), unbonded prestressing tendon (4), metal bellows (5), sleeve shear connector (6) and pin stick shear connector (7).The present invention also provides a kind of construction methods of Self-resetting precast assembly bridge pier.The embodiment of the present invention can make the prefabricated subsection of relative dislocation set back with the help of SMA, effectively increase shearing resistance, Torsion bearing capacity and the integral reset ability of bridge pier using modular sleeve (pin stick) the strong advantage of shear connector self-resetting capability.Meanwhile using the hexagon-headed bolt welded on the outside of shear connector, seam crossing shearing can uniformly, be steadily transmitted, prevents seam crossing part concrete stress from concentrating and damages broken.In addition, combined type shear connector may also function as positioning action, on-site consolidation construction efficiency can be accelerated, and the sleeve shear connector for being set to pier section center can be used as prestress pipe.
Description
Technical field
The present invention relates to technical field of bridge engineering more particularly to a kind of Self-resetting precast assembly bridge piers and its construction party
Method.
Background technique
In recent years, China's traffic infrastructure especially high-speed railway, highway and city expressway is fast-developing,
Bridge engineering occupies very important status, and huge construction demand proposes the construction quality and construction efficiency of science of bridge building
Higher requirement.Precast assembly structure is remarkably improved construction efficiency, is ensured with its standardization, modular form of construction work
Construction quality, and have many advantages, such as few to existing Coherent traffic noise, green, environmentally friendly, receives significant attention in recent years, obtain country,
The promotion energetically of industry, is very suitable for the construction of science of bridge building.In terms of the applicable cases of China's prefabricated bridge, lower junction
The research of structure precast assembly technology and application practice still in its infancy, focus primarily upon low earthquake intensity earthquake protection area at present
Across river, Oversea bridge and Urban Bridge.It sets up defences area for high-intensity earthquake, due to the presence of splicing structure seam between segment,
Cause the sidewise restraint of precast assembly bridge pier weaker, there is obvious deficiency compared to cast-in-place monoblock type bridge pier in anti-seismic performance,
It is easier to wreck in earthquake.Therefore, research and development are suitable for the precast assembly bridge pier structure form and its construction party of highly seismic region
Method has important scientific meaning and engineering practical value.
It is weak for the connection of precast assembly bridge pier seam region, be easy to happen segment under geological process between horizontal sliding simultaneously
The problem for causing top of bridge pier lateral deformation excessive, and the way that joint surface smears epoxy resin will lead to bridge pier in severe earthquake action
Lower generation brittle break, setting shear connector are the effective measures for enhancing bridge pier shear resistance, mitigating sliding deformation.The prior art
In, concrete shear key, there may be stress concentration phenomenon and expendable residual impairment, is led under severe earthquake action when serious
Convex key is caused to cut destruction and the serious diagonal crack of concave key surrounding concrete appearance.
Prior art has:
(1) carvel joint involvement connects.Bridge pier is vertically divided into several segments, Reinforcement and lateral tie connecing
Discontinuous at seam, joint surface is smooth and does not increase other any materials or measure, the simple mode for relying on post-tensioned prestressing muscle
By the integral type of attachment of segment lontitudinal series.
(2) concrete shear is keyed.One kind of Tenon seam type of attachment, the bottom and top point of each bridge pier segment
Not She Zhi castellated or prismatic convex key (tenon) and concave key (tongue-and-groove), convex key, concave key part plain concrete can be used, can also
The globality with segment is kept by necessary arrangement of reinforcement.
(3) joint surface smears epoxy resin connection.On the basis of carvel joint involvement connects, between bridge pier segment in connection
Epoxy resin is smeared, to reinforce the connection type of switching performance between segment.
Above-mentioned technical disadvantages are as follows:
(1) carvel joint involvement connects: seam region connection is weak, and bridge pier is prone between segment under lateral load effect
Relative to the changing of the relative positions or rotation.
(2) concrete shear is keyed: being easy to appear stress concentration phenomenon around shear connector under load action, is caused to mix
Solidifying soil localized crush is broken, causes convex key to be cut when serious and destroys, concave key surrounding concrete serious diagonal crack occurs and breaks
It is bad.The not local self-resetting capability of bridge pier under such connection type.
(3) joint surface smears epoxy resin connection: cause bridge pier bearing capacity to reduce when epoxy resin sheared destruction suddenly,
Brittle break occurs for structure.
Summary of the invention
The embodiment provides a kind of Self-resetting precast assembly bridge pier and its construction methods, to overcome the prior art
Defect.To achieve the goals above, this invention takes following technical solutions.
A kind of Self-resetting precast assembly bridge pier, comprising: cushion cap 1, column 22, prefabricated bent cap 3, unbonded prestressing tendon 4, gold
Belong to bellows 5, sleeve shear connector 6 and pin stick shear connector 7；
The top of cushion cap 1 is arranged in one end of the column 22, and the other end connect with the bottom of the prefabricated bent cap 3, holds
Platform 1, column 22 and prefabricated bent cap 3 form whole, 4 both ends of unbonded prestressing tendon difference by the connection of unbonded prestressing tendon 4
It is anchored in cushion cap 1 and prefabricated bent cap 3；
The column 22 is spliced to form by several 2 end faces of prefabricated subsection alignment vertical pile；
Between the cushion cap 1 and prefabricated subsection 2, between prefabricated subsection 2 and prefabricated bent cap 3 and between each prefabricated subsection 2
Seam region be provided with combined type shear connector；
The combined type shear connector includes sleeve shear connector 6 and several surround the pin stick of the sleeve shear connector 6 arrangement
Shear connector 7；
The sleeve shear connector 6 includes sleeve shear connector outer tube 12 and sleeve shear connector inner tube 13；
The pin stick shear connector 7 includes pin stick shear connector outer tube 17 and pin stick 16；
Inside the cushion cap 1, the inside of prefabricated subsection 2 and 3 inside built-in metal bellows 5 of prefabricated bent cap, the sleeve is cut
13 upper end of power key inner tube and 12 lower end of sleeve shear connector outer tube by sleeve coupler 14 respectively with the institute in affiliated prefabricated subsection 2
It states metal bellows 5 to be connected, the unbonded prestressing tendon 4 is from sleeve shear connector outer tube 12, sleeve shear connector inner tube 13, metal
It is passed through in bellows 5 and sleeve coupler 14.
Preferably, the center of the unbonded prestressing tendon 4 is overlapped with 1 end face center of cushion cap.
Preferably, the sleeve shear connector 6 is located at 1 cross-section center of cushion cap, 2 cross-section center of prefabricated subsection and pre-
The cross-section center of bent cap 3 processed, the pin stick shear connector 7 is circumferential along 1 cross section of cushion cap respectively, 2 cross section of prefabricated subsection is circumferential
It is circumferentially uniformly distributed with prefabricated 3 cross section of bent cap.
Preferably, the cushion cap 1 is the reinforced concrete structure of rectangular or square cross section；
The prefabricated subsection 2 is the reinforced concrete structure of rectangle or circular cross section；
The prefabricated bent cap 3 is the reinforced concrete structure of rectangular cross section.
Preferably, the unbonded prestressing tendon 4 has the non-stretch-draw anchor end 8 of unbonded prestressing tendon and soap-free emulsion polymeization pre-
The non-stretch-draw anchor end 8 at stress rib stretch-draw anchor end 9, the unbonded prestressing tendon is embedded in advance in cushion cap 1, prestressing without bondn
Muscle stretch-draw anchor end 9 is connect with prefabricated bent cap 3.
Preferably, 1 end face center of cushion cap and the pre-buried sleeve of adjacent 2 bottom center of prefabricated subsection difference shear
Key outer tube 12 and sleeve shear connector inner tube 13,12 top surface of sleeve shear connector outer tube and 1 either flush of cushion cap, the sleeve are cut
2 bottom surface of prefabricated subsection is stretched out in 13 one end of power key inner tube；
The pre-buried sleeve shear connector is distinguished by 2 end face center of prefabricated subsection and adjacent 2 bottom center of prefabricated subsection
Outer tube 12 and sleeve shear connector inner tube 13, and 12 top surface of sleeve shear connector outer tube and 2 segment either flush of prefabricated subsection, the set
2 bottom surface of prefabricated subsection is stretched out in 13 one end of cylinder shear connector inner tube；
The pre-buried sleeve shear connector is distinguished by 2 end face center of prefabricated subsection and adjacent 3 bottom center of prefabricated bent cap
Outer tube 12 and sleeve shear connector inner tube 13, and 12 top surface of sleeve shear connector outer tube and 2 segment either flush of prefabricated subsection, the set
Prefabricated 3 bottom surface of bent cap is stretched out in 13 one end of cylinder shear connector inner tube；
The 1 top surface surrounding of cushion cap and contiguous prefabricated 2 bottom surface surrounding of segment are uniformly embedded with the corresponding pin stick in position and shear
Key outer tube 17 and pin stick 16,17 top surface of pin stick shear connector outer tube and 1 either flush of cushion cap, one end of the pin stick 16
Stretch out 2 bottom surface of prefabricated subsection；
The 2 top surface surrounding of prefabricated subsection and contiguous prefabricated 2 bottom surface surrounding of segment are uniformly embedded with the corresponding pin stick in position
Shear connector outer tube 17 and pin stick 16,17 top surface of pin stick shear connector outer tube and 2 either flush of prefabricated subsection, the pin stick
2 bottom surface of prefabricated subsection is stretched out in 16 one end；
The 2 top surface surrounding of prefabricated subsection and contiguous prefabricated 3 bottom surface surrounding of bent cap are uniformly embedded with the corresponding pin stick in position
Shear connector outer tube 17 and pin stick 16,17 top surface of pin stick shear connector outer tube and 2 either flush of prefabricated subsection, the pin stick
Prefabricated 3 bottom surface of bent cap is stretched out in 16 one end；
The central axis of the pin stick shear connector outer tube 17 is in 2 top surface of the cushion cap 1 and prefabricated subsection.
Preferably, 3 end face center of prefabricated bent cap reserves the groove at unbonded prestressing tendon stretch-draw anchor end 9.
Preferably, it misplaces on the outside of 6 inner and outer pipes of sleeve shear connector, on the outside of 17 outside of pin stick shear connector outer tube and pin stick 16
More hexagon-headed bolts 15 are welded, the sleeve shear connector 6 and pin stick shear connector 7 need to add film zincincation to handle using zinc.
Preferably, the sleeve coupler 14 is the horn shaped connector of stainless steel material.
Preferably, the sleeve shear connector outer tube 12 and pin stick shear connector outer tube 17 are low carbon steel pipe；The sleeve shearing
Key inner tube 13 is SMA pipe, and pin stick 16 is that the solid SMA of circular cross section sells stick.
Preferably, shown bridge pier be twin shaft pier, have two respectively with prefabricated 3 bottom of bent cap column 22 connected vertically.
Preferably, the quantity of the pin stick shear connector 7 is distinguished according to the cross section power axis of the bridge pier and is arranged, the pin
The quantity of stick shear connector 7 is 2n, and n is positive integer.
Preferably, the unbonded prestressing tendon 4 and 6 quantity of sleeve shear connector are 2n, and n is positive integer, the soap-free emulsion polymeization
The section arrangement form of presstressed reinforcing steel 4 be arranged symmetrically or surrounding arrangement, the cross-section center of the sleeve shear connector 6 with it is described
The cross-section center of unbonded prestressing tendon 4 is overlapped.
A kind of construction method using any bridge pier of claim 1-13, comprising the following steps:
Step 1: completing the prefabricated work of cushion cap 1, prefabricated subsection 2 and prefabricated bent cap 3 in factory, above each prefabricated components are tied up
It wire-ties and fixes position after cage, rigging, corresponding position fixes sleeve shear connector 6, pin stick shear connector 7 and gold in steel reinforcement cage
Belong to bellows 5, and is connected with sleeve coupler 14, it need to be pre-buried to pre- together by unbonded prestressing tendon 4 when making prefabricated cushion cap 1
9 groove of tension of prestressed tendon anchored end need to be reserved inside cushion cap 1 processed, when making prefabricated bent cap 3；
Step 2: after precast concrete is transported to scene, by the sleeve shear connector inner tube 13 of prefabricated subsection 2 or pin
The alignment of stick shear connector SMA stick 16 insertion 1 sleeve shear connector outer tube 12 of cushion cap or the position for selling stick shear connector outer tube 17, it is pre- by upper one
The sleeve shear connector inner tube 13 of segment 2 processed or the pin alignment of stick shear connector SMA stick 16 are inserted into outside next 2 sleeve shear connector of prefabricated subsection
Pipe 12 or the position for selling stick shear connector outer tube 17, and unbonded prestressing tendon 4 is passed through from pipeline, successively section is pacified section by section
The sleeve shear connector inner tube 13 of prefabricated bent cap 3 or the pin alignment of stick shear connector SMA stick 16 are inserted into neighbouring 2 sleeve of prefabricated subsection by dress
Shear connector outer tube 12 or the position for selling stick shear connector outer tube 17；
Step 3: after each component is installed, tensioning being carried out by jack pair presstressed reinforcing steel 4 in pier top, tensioning is completed
Prefabricated 3 top surface groove of bent cap is poured with cement mortar afterwards and is tamped；
Step 4: after the completion of prefabricated bent cap 3 pours, seam crossing outer surface will be applied to epoxy resin and carry out joint seal
Processing prevents rainwater etc. from corroding seam.
As can be seen from the technical scheme provided by the above-mentioned embodiment of the present invention, the embodiment of the invention provides a kind of runbacks
Position precast assembly bridge pier can make relative dislocation using modular sleeve (pin stick) the strong advantage of shear connector self-resetting capability
Prefabricated subsection sets back with the help of SMA, effectively increases shearing resistance, Torsion bearing capacity and the integral reset ability of bridge pier.
Meanwhile using the hexagon-headed bolt welded on the outside of shear connector, seam crossing shearing can uniformly, be steadily transmitted, seam crossing is prevented
Local concrete stress is concentrated and is damaged broken.In addition, combined type shear connector may also function as positioning action.The embodiment of the present invention
A kind of construction method of Self-resetting precast assembly bridge pier is provided, on-site consolidation construction efficiency can be accelerated, and is set to bridge pier and cuts
The sleeve shear connector at face center can be used as prestress pipe.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without creative efforts, it can also be obtained according to these attached drawings others
Attached drawing.
Fig. 1 is a kind of Self-resetting precast assembly bridge pier general structure schematic diagram provided in an embodiment of the present invention；
Fig. 2 is a kind of shear connector shearing-deformation relationship provided by the invention；
Fig. 3 is a kind of circular cross-section bridge pier segment provided in an embodiment of the present invention diagrammatic cross-section；
Fig. 4 is a kind of rectangular section bridge pier segment provided in an embodiment of the present invention diagrammatic cross-section；
Fig. 5 is a kind of sleeve shear connector assembly front construction schematic diagram provided in an embodiment of the present invention；
Fig. 6 is organigram after a kind of sleeve shear connector provided in an embodiment of the present invention is assembled；
Fig. 7 is a kind of pin stick shear connector assembly front construction schematic diagram provided in an embodiment of the present invention；
Fig. 8 is organigram after a kind of pin stick shear connector provided in an embodiment of the present invention is assembled；
Fig. 9 is a kind of sleeve shear connector drawing provided in an embodiment of the present invention, and (a) is sleeve shear connector front elevation view,
(b) it is sleeve shear connector side elevational view, (c) is sleeve shear connector plan view, (d) is A-A cross-section diagram；
Figure 10 is a kind of pin stick shear connector drawing provided in an embodiment of the present invention, and (a) is pin stick shear connector front elevation view,
(b) it is pin stick shear connector side elevational view, (c) is pin stick shear connector plan view, (d) is B-B cross-section diagram.
Appended drawing reference:
1 cushion cap；2 prefabricated subsections；3 prefabricated bent caps；4 unbonded prestressing tendons；5 metal bellows；6 embedded sleeve barrels shearing
Key；7 pre-buried pin stick shear connectors；The non-stretch-draw anchor end of 8 unbonded prestressing tendons；9 unbonded prestressing tendon stretch-draw anchor ends；10
Commonly vertical strength；11 stirrups；12 sleeve shear connector mild steel outer tubes；13 sleeve shear connector SMA inner tubes；14 sleeve couplers；15 6
Hex bolt；16SMA sells stick；17 pin stick shear connector mild steel outer tubes；18 segmental joints；22 columns.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
Part is " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or coupling.Wording used herein
"and/or" includes one or more associated any cells for listing item and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, it will not be explained in an idealized or overly formal meaning.
In order to facilitate understanding of embodiments of the present invention, it is done by taking several specific embodiments as an example below in conjunction with attached drawing further
Explanation, and each embodiment does not constitute the restriction to the embodiment of the present invention.
The embodiment of the invention provides a kind of Self-resetting precast assembly bridge piers, as shown in Figure 1, comprising: cushion cap 1, column 22,
Prefabricated bent cap 3, unbonded prestressing tendon 4, metal bellows 5, sleeve shear connector 6 and pin stick shear connector 7, wherein such as Fig. 3, Fig. 4
Shown, respectively the bridge pier segment diagrammatic cross-section of circular cross-section and rectangular section, cushion cap 1 are the steel of rectangular or square cross section
Tendon concrete structure, prefabricated subsection 2 are the reinforced concrete structure of rectangle or circular cross section, and prefabricated bent cap 3 is rectangular cross-sectional
The reinforced concrete structure in face.
The top of cushion cap 1 is arranged in one end of column 22, and the other end is connect with the bottom of prefabricated bent cap 3, cushion cap 1, column
22 and prefabricated bent cap 3 whole, non-8 He of stretch-draw anchor end of unbonded prestressing tendon formed by the connection of unbonded prestressing tendon 4
Unbonded prestressing tendon stretch-draw anchor end 9 is anchored at respectively in cushion cap 1 and prefabricated bent cap 3, the center of unbonded prestressing tendon 4 with
1 end face center of cushion cap is overlapped, and prefabricated 3 end face center of bent cap reserves the groove at unbonded prestressing tendon stretch-draw anchor end 9.
Column 22 is spliced to form by four 2 end face of prefabricated subsection alignment vertical piles.
Connecing between cushion cap 1 and prefabricated subsection 2, between prefabricated subsection 2 and prefabricated bent cap 3 and between each prefabricated subsection 2
Seam region is provided with combined type shear connector, and as shown in Figure 3, Figure 4, combined type shear connector includes that sleeve shear connector 6 and 4 pin stick is cut
Power key 7, sleeve shear connector 6 are located at 3 cross-section center of cushion cap 1, prefabricated subsection 2 and prefabricated bent cap, pin stick shear connector 7 along cushion cap 1,
Prefabricated subsection 2 and 3 cross section of prefabricated bent cap are circumferentially uniformly distributed.
As shown in Fig. 5-Fig. 9 sleeve shear connector and pin stick shear key structure schematic diagram, sleeve shear connector 6 is sheared including sleeve
Key mild steel outer tube 12 and sleeve shear connector SMA inner tube 13, pin stick shear connector 7 include 17 He of pin stick shear connector mild steel outer tube
SMA sells stick 16, wherein SMA sells the solid SMA that stick 16 is circular cross section and sells stick.Sleeve shear connector 6 and pin stick shear connector 7
Resilience model as shown in Fig. 2 shear connector shearing-deformation relationship, shear connector bear Lateral Force when with certain carrying
Power, residual deformation is 0 after unloading, illustrates that combined type shear connector provided in an embodiment of the present invention has certain bearing capacity, energy consumption
Ability and good self-resetting capability.
The inner and outer pipes of sleeve shear connector 6 are embedded in advance respectively in the concrete component of two sides up and down of seam crossing, in cushion cap 1
Portion, the inside of prefabricated subsection 2 and 3 inside of prefabricated bent cap built-in metal bellows 5, the cross-section center line of metal bellows 5 with
The center line of prefabricated subsection 2 is overlapped, and 13 upper end of sleeve shear connector inner tube and 12 lower end of sleeve shear connector outer tube pass through sleeve connection
Device 14 is connected with the metal bellows 5 in said members respectively, and unbonded prestressing tendon 4 is from sleeve shear connector outer tube 12, sleeve
It is passed through in shear connector inner tube 13, metal bellows 5 and sleeve coupler 14.
1 end face center of cushion cap and adjacent 2 bottom center of prefabricated subsection difference embedded sleeve barrel shear connector outer tube 12 and sleeve
Shear connector inner tube 13,12 top surface of sleeve shear connector outer tube and 1 either flush of cushion cap, 13 one end of sleeve shear connector inner tube are stretched out prefabricated
2 bottom surface of segment.
2 end face center of prefabricated subsection and adjacent 2 bottom center of prefabricated subsection difference embedded sleeve barrel shear connector outer tube 12 and
Sleeve shear connector inner tube 13, and 12 top surface of sleeve shear connector outer tube and 2 segment either flush of prefabricated subsection, sleeve shear connector inner tube
2 bottom surface of prefabricated subsection is stretched out in 13 one end.
2 end face center of prefabricated subsection and adjacent 3 bottom center of prefabricated bent cap difference embedded sleeve barrel shear connector outer tube 12 and
Sleeve shear connector inner tube 13, and 12 top surface of sleeve shear connector outer tube and 2 segment either flush of prefabricated subsection, sleeve shear connector inner tube
Prefabricated 3 bottom surface of bent cap is stretched out in 13 one end；
1 top surface surrounding of cushion cap and contiguous prefabricated 2 bottom surface surrounding of segment are uniformly embedded with outside the corresponding pin stick shear connector in position
Pipe 17 and pin stick 16, pin 17 top surface of stick shear connector outer tube and 1 either flush of cushion cap, one end of the pin stick 16 are stretched out described prefabricated
2 bottom surface of segment.
2 top surface surrounding of prefabricated subsection and contiguous prefabricated 2 bottom surface surrounding of segment are uniformly embedded with the corresponding pin stick in position and shear
One end of key outer tube 17 and pin stick 16, pin 17 top surface of stick shear connector outer tube and 2 either flush of prefabricated subsection, the pin stick 16 is stretched out
2 bottom surface of prefabricated subsection；
2 top surface surrounding of prefabricated subsection and contiguous prefabricated 3 bottom surface surrounding of bent cap are uniformly embedded with the corresponding pin stick in position and shear
Key outer tube 17 and pin stick 16, pin 17 top surface of stick shear connector outer tube and 2 either flush of prefabricated subsection, one end of pin stick 16 are stretched out prefabricated
3 bottom surface of bent cap；
The central axis of stick shear connector outer tube 17 is sold in 3 top surface of cushion cap 1 and prefabricated subsection.
It combines closely between stick shear connector 7 and concrete to make between sleeve shear connector 6 and concrete and selling and stablizes biography
Power, dislocation welds more six on the outside of the inner and outer pipes of sleeve shear connector 6 and on the outside of 17 outside of pin stick shear connector outer tube and pin stick 16
Hex bolt 15 prevents from corroding in addition, sleeve shear connector 6 and pin stick shear connector 7 need to add film zincincation to handle using zinc.
Sleeve coupler 14 is the horn shaped connector of stainless steel material, and engineering structure glue is respectively adopted by SMA in two-port
Inner tube or mild steel outer tube are connect with metal bellows 5, seal prestress pipe, when preventing subsequent construction concrete or its
He penetrates into prestress pipe at sundries.
Commonly vertical muscle 10 and stirrup 11 are also embedded in prefabricated subsection 2, as shown in Fig. 1, Fig. 3 to Fig. 8.
The embodiment of the invention also provides a kind of construction methods of Self-resetting precast assembly bridge pier, comprising the following steps:
Step 1: completing the prefabricated work of cushion cap 1, prefabricated subsection 2 and prefabricated bent cap 3 in factory, above each prefabricated components are tied up
It wire-ties and fixes position after cage, rigging, corresponding position fixes sleeve shear connector 6, pin stick shear connector 7 and gold in steel reinforcement cage
Belong to bellows 5, and is connected with sleeve coupler 14, it need to be pre-buried to pre- together by unbonded prestressing tendon 4 when making prefabricated cushion cap 1
9 groove of tension of prestressed tendon anchored end need to be reserved inside cushion cap 1 processed, when making prefabricated bent cap 3；
Step 2: after precast concrete is transported to scene, by the sleeve shear connector inner tube 13 of prefabricated subsection 2 and pin
The position of stick shear connector SMA stick 16 alignment insertion cushion cap 1 sleeve shear connector outer tube 12 and pin stick shear connector outer tube 17；It is pre- by upper one
Sleeve shear connector inner tube 13 and pin stick shear connector SMA stick 16 alignment of segment 2 processed are inserted into outside next 2 sleeve shear connector of prefabricated subsection
The position of pipe 12 and pin stick shear connector outer tube 17, and unbonded prestressing tendon 4 is passed through from pipeline, successively section is pacified section by section
Dress；The sleeve shear connector inner tube 13 of prefabricated bent cap 3 and the pin stick shear connector SMA pin alignment of stick 16 are inserted into neighbouring 2 sets of prefabricated subsection
The position of cylinder shear connector outer tube 12 and pin stick shear connector outer tube 17；
Step 3: after each component is installed, tensioning being carried out by jack pair presstressed reinforcing steel 4 in pier top, tensioning is completed
Prefabricated 3 top surface groove of bent cap is poured with cement mortar afterwards and is tamped；
Step 4: after the completion of prefabricated bent cap 3 pours, seam crossing outer surface will be applied to epoxy resin and carry out joint seal
Processing prevents rainwater etc. from corroding seam.
A kind of above-mentioned Self-resetting precast assembly bridge pier can also be twin shaft pier, have two respectively with prefabricated 3 bottom of bent cap
Column 22 connected vertically.
The arrangement of above-mentioned presstressed reinforcing steel list area of beam center arrangement is only for example, and can also be made according to actual needs corresponding
Adjustment, arrangement are that mutually should be 2 beams, 4 beams even more about the strong axial symmetry arrangement in bridge pier cross section or surrounding arrangement, quantity
It is more.
Above-mentioned pin stick shear connector and the arrangement of sleeve shear connector, quantity are only for example, can also be according to actual needs
It is adjusted accordingly, pin stick shear connector arrangement can be distinguished according to bridge pier cross section power axis and be arranged, quantity can increase in pairs
To 6,8 it is even more, the quantity of sleeve shear connector is consistent with presstressed reinforcing steel quantity, and the cross-section center of sleeve shear connector
It is overlapped with the cross-section center of unbonded prestressing tendon.
In conclusion a kind of Self-resetting precast assembly bridge pier of the embodiment of the present invention and its construction method, advantage are:
(1) modular sleeve shear connector and pin stick shear connector have the characteristics that significant runback bit function and power transmission is uniform,
It can prevent shear connector from occurring seriously damaging under horizontal loads, marmem can be by the changing of the relative positions mutual under geological process
Adjacent segment restores to original position, effectively increases shearing resistance, the Torsion bearing capacity of bridge pier.
(2) hexagon-headed bolt is welded on the outside of shear connector, can uniformly, steadily be transmitted seam crossing shearing, be prevented seam crossing
Local concrete stress is concentrated and is crushed or is crushed.
(3) modular sleeve shear connector and pin stick shear connector can play positioning action, can accelerate on-site consolidation construction efficiency,
And the sleeve shear connector for being located at pier section center can be used as prestress pipe.
(4) construction method of the present invention is simple, easy to operate, and construction efficiency is high, and structure durability is good.
(5) present invention has good economy by rational design and large-scale production.
Those of ordinary skill in the art will appreciate that: attached drawing is the schematic diagram of one embodiment, module in attached drawing or
Process is not necessarily implemented necessary to the present invention.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for device or
For system embodiment, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to method
The part of embodiment illustrates.Apparatus and system embodiment described above is only schematical, wherein the conduct
The unit of separate part description may or may not be physically separated, component shown as a unit can be or
Person may not be physical unit, it can and it is in one place, or may be distributed over multiple network units.It can root
According to actual need that some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Ordinary skill
Personnel can understand and implement without creative efforts.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.
Claims (14)
1. a kind of Self-resetting precast assembly bridge pier characterized by comprising cushion cap (1), column (22), prefabricated bent cap (3), nothing
Binding prestress reinforcement (4), metal bellows (5), sleeve shear connector (6) and pin stick shear connector (7)；
One end of the column (22) is arranged at the top of cushion cap (1), and the other end is connect with the bottom of the prefabricated bent cap (3),
Cushion cap (1), column (22) and prefabricated bent cap (3) form whole, unbonded prestressing tendon by unbonded prestressing tendon (4) connection
(4) both ends are anchored at respectively in cushion cap (1) and prefabricated bent cap (3)；
The column (22) is spliced to form by several prefabricated subsections (2) end face alignment vertical pile；
Between the cushion cap (1) and prefabricated subsection (2), between prefabricated subsection (2) and prefabricated bent cap (3) and each prefabricated subsection
(2) seam region between is provided with combined type shear connector；
The combined type shear connector includes sleeve shear connector (6) and several surround the pin stick of the sleeve shear connector (6) arrangement
Shear connector (7)；
The sleeve shear connector (6) includes sleeve shear connector outer tube (12) and sleeve shear connector inner tube (13)；
The pin stick shear connector (7) includes pin stick shear connector outer tube (17) and pin stick (16)；
The cushion cap (1) is internal, prefabricated subsection (2) is internal and prefabricated bent cap (3) internal built-in metal bellows (5), the set
Cylinder shear connector inner tube (13) upper end and sleeve shear connector outer tube (12) lower end by sleeve coupler (14) respectively with it is affiliated prefabricated
The metal bellows (5) in segment (2) is connected, and the unbonded prestressing tendon (4) is from sleeve shear connector outer tube (12), set
It is passed through in cylinder shear connector inner tube (13), metal bellows (5) and sleeve coupler (14).
2. bridge pier according to claim 1, which is characterized in that the center and cushion cap (1) of the unbonded prestressing tendon (4)
End face center is overlapped.
3. bridge pier according to claim 1, which is characterized in that it is transversal that the sleeve shear connector (6) is located at cushion cap (1)
Face center, prefabricated subsection (2) cross-section center and prefabricated bent cap (3) cross-section center, the pin stick shear connector (7) edge respectively
Cushion cap (1) cross section is circumferential, prefabricated subsection (2) cross section is circumferential and prefabricated bent cap (3) cross section is circumferentially uniformly distributed.
4. bridge pier according to claim 1, which is characterized in that the cushion cap (1) is the steel of rectangular or square cross section
Tendon concrete structure；
The prefabricated subsection (2) is the reinforced concrete structure of rectangle or circular cross section；
The prefabricated bent cap (3) is the reinforced concrete structure of rectangular cross section.
5. bridge pier according to claim 1, which is characterized in that there is the unbonded prestressing tendon (4) soap-free emulsion polymeization to answer in advance
The non-stretch-draw anchor end (8) of power muscle and unbonded prestressing tendon stretch-draw anchor end (9), the non-tensioning of the unbonded prestressing tendon
Anchored end (8) is embedded in advance in cushion cap (1), and unbonded prestressing tendon stretch-draw anchor end (9) is connect with prefabricated bent cap (3).
6. bridge pier according to claim 1, which is characterized in that cushion cap (1) end face center and adjacent prefabricated subsection
(2) the pre-buried sleeve shear connector outer tube (12) and sleeve shear connector inner tube (13), the sleeve shear connector are distinguished by bottom center
Prefabricated subsection (2) bottom is stretched out in outer tube (12) top surface and cushion cap (1) either flush, the sleeve shear connector inner tube (13) one end
Face；
The pre-buried sleeve shear connector is distinguished by prefabricated subsection (2) end face center and adjacent prefabricated subsection (2) bottom center
Outer tube (12) and sleeve shear connector inner tube (13), and sleeve shear connector outer tube (12) top surface and prefabricated subsection (2) segment top surface are flat
Together, prefabricated subsection (2) bottom surface is stretched out in the sleeve shear connector inner tube (13) one end；
The pre-buried sleeve shear connector is distinguished by prefabricated subsection (2) end face center and adjacent prefabricated bent cap (3) bottom center
Outer tube (12) and sleeve shear connector inner tube (13), and sleeve shear connector outer tube (12) top surface and prefabricated subsection (2) segment top surface are flat
Together, prefabricated bent cap (3) bottom surface is stretched out in the sleeve shear connector inner tube (13) one end；
Cushion cap (1) the top surface surrounding and contiguous prefabricated segment (2) bottom surface surrounding are uniformly embedded with the corresponding pin stick in position and shear
Key outer tube (17) and pin stick (16), the pin stick shear connector outer tube (17) top surface and the cushion cap (1) either flush, the pin stick
(16) prefabricated subsection (2) bottom surface is stretched out in one end；
Prefabricated subsection (2) the top surface surrounding and contiguous prefabricated segment (2) bottom surface surrounding are uniformly embedded with the corresponding pin stick in position
Shear connector outer tube (17) and pin stick (16), the pin stick shear connector outer tube (17) top surface and the prefabricated subsection (2) either flush,
Prefabricated subsection (2) bottom surface is stretched out in one end of the pin stick (16)；
Prefabricated subsection (2) the top surface surrounding and contiguous prefabricated bent cap (3) bottom surface surrounding are uniformly embedded with the corresponding pin stick in position
Shear connector outer tube (17) and pin stick (16), the pin stick shear connector outer tube (17) top surface and the prefabricated subsection (2) either flush,
Prefabricated bent cap (3) bottom surface is stretched out in one end of the pin stick (16)；
The central axis of the pin stick shear connector outer tube (17) is in the cushion cap (1) and prefabricated subsection (2) top surface.
7. bridge pier according to claim 1, which is characterized in that it is pre- that prefabricated bent cap (3) end face center reserves soap-free emulsion polymeization
The groove at stress rib stretch-draw anchor end (9).
8. bridge pier according to claim 1, which is characterized in that on the outside of sleeve shear connector (6) inner and outer pipes, sell stick shearing
Misplace more hexagon-headed bolts (15) of welding, the sleeve shear connector (6) and pin on the outside of key outer tube (17) and on the outside of pin stick (16)
Stick shear connector (7) need to add film zincincation to handle using zinc.
9. bridge pier according to claim 1, which is characterized in that the sleeve coupler (14) is the loudspeaker of stainless steel material
Shape connector.
10. bridge pier according to claim 1, which is characterized in that the sleeve shear connector outer tube (12) and pin stick shear connector
Outer tube (17) is low carbon steel pipe；The sleeve shear connector inner tube (13) is SMA pipe, and pin stick (16) is the solid of circular cross section
SMA sells stick.
11. bridge pier shown according to claim 1, which is characterized in that shown bridge pier be twin shaft pier, have two respectively with it is prefabricated
Bent cap (3) bottom column connected vertically (22).
12. bridge pier according to claim 1, which is characterized in that the quantity of the pin stick shear connector (7) is according to the bridge pier
Cross section power axis distinguish arrangement, the quantity of the pin stick shear connector (7) is 2n, and n is positive integer.
13. bridge pier according to claim 1, which is characterized in that the unbonded prestressing tendon (4) and sleeve shear connector
(6) quantity is 2n, and n is positive integer, and the section arrangement form of the unbonded prestressing tendon (4) is to be arranged symmetrically or surrounding cloth
It sets, the cross-section center of the sleeve shear connector (6) is overlapped with the cross-section center of the unbonded prestressing tendon (4).
14. a kind of construction method using any bridge pier of claim 1-13, which comprises the following steps:
Step 1: completing the prefabricated work of cushion cap (1), prefabricated subsection (2) and prefabricated bent cap (3), above each prefabricated components in factory
Position is fixed after banding steel cage, rigging, corresponding position fixes sleeve shear connector (6), pin stick shear connector in steel reinforcement cage
(7) and metal bellows (5) it, and with sleeve coupler (14) connects, it need to be by unbonded prestressing tendon when making prefabricated cushion cap (1)
(4) pre-buried to prefabricated cushion cap (1) is internal together, and it is recessed that tension of prestressed tendon anchored end (9) need to be reserved when making prefabricated bent cap (3)
Slot；
Step 2: after precast concrete is transported to scene, by the sleeve shear connector inner tube (13) of prefabricated subsection (2) or pin
Stick shear connector SMA stick (16) alignment insertion cushion cap (1) sleeve shear connector outer tube (12) or the position for selling stick shear connector outer tube (17),
The sleeve shear connector inner tube (13) of a upper prefabricated subsection (2) or pin stick shear connector SMA stick (16) alignment are inserted into next prefabricated section
Section (2) sleeve shear connector outer tube (12) or the position for selling stick shear connector outer tube (17), and by unbonded prestressing tendon (4) from pipeline
In pass through, successively section is installed section by section, by the sleeve shear connector inner tube (13) of prefabricated bent cap (3) or pin stick shear connector SMA stick
(16) alignment is inserted into neighbouring prefabricated subsection (2) sleeve shear connector outer tube (12) or sells the position of stick shear connector outer tube (17)；
Step 3: after each component is installed, tensioning is carried out by jack pair presstressed reinforcing steel (4) in pier top, after the completion of tensioning
Prefabricated bent cap (3) top surface groove is poured with cement mortar and is tamped；
Step 4: after the completion of prefabricated bent cap (3) pours, seam crossing outer surface will be applied to epoxy resin and carried out at joint seal
Reason prevents rainwater etc. from corroding seam.
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| CN115125866A (en) * | 2022-08-10 | 2022-09-30 | 北京城建设计发展集团股份有限公司 | Method for connecting prefabricated vase piers through unbonded prestressed tendons and steel bars |
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| CN115125866A (en) * | 2022-08-10 | 2022-09-30 | 北京城建设计发展集团股份有限公司 | Method for connecting prefabricated vase piers through unbonded prestressed tendons and steel bars |
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