CN106320162B - Using the precast assembly bent cap structure and construction method of steel shear connector - Google Patents
Using the precast assembly bent cap structure and construction method of steel shear connector Download PDFInfo
- Publication number
- CN106320162B CN106320162B CN201610704462.0A CN201610704462A CN106320162B CN 106320162 B CN106320162 B CN 106320162B CN 201610704462 A CN201610704462 A CN 201610704462A CN 106320162 B CN106320162 B CN 106320162B
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- Prior art keywords
- shear connector
- concrete component
- steel
- bent cap
- male
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
-
- 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
-
- 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
- E01D2101/30—Metal
Abstract
The present invention relates to a kind of precast assembly bent cap structure and construction method using steel shear connector, the steel shear connector of precast assembly bent cap uses male and female pairing type shear connector, and material is that spheroidal graphite cast-iron or carbon constructional quality steel casting form.Bent cap is divided into the prefabricated component of three sections of difference, in the pre-buried parent form shear connector in two plug-in sections of stitching portions, the pre-buried male shear connector in interlude stitching portion；Lift interlude component respectively with crane, two segmentum laterale components, after calibrating position, wear and put and tensioning first stage presstressed reinforcing steel makes three-stage structure connection integral, complete prestressed pore passage slip casting closing and sealing off and covering anchorage；By reserved slip casting duct, to parent form steel shear connector internal high pressure slip casting, the seam between male and female shear connector is handled, the present invention compared with prior art, reduces complexity of the large and small shear connector of tradition in prefabrication phase template construct；By the way of male and female pairing, not only facilitate the position in hoisting process to determine, and more efficiently promote the occlusion between component.
Description
Technical field
It is especially a kind of using the preform lid girder construction of steel shear connector and construction the present invention relates to a kind of preform lid girder construction
Method.
Background technology
The cast-in-place construction of concrete-bridge is, it is necessary to which substantial amounts of template and support system, under bad execution conditions, set up full
Hall mount approach is infeasible.Coping Construction belongs to work high above the ground, cast-in-place a large amount of concrete, and construction risk is big.Using precast assembly
The mode of bent cap can accelerate speed of application, ensure quality, while have good economy in view of scale effect.
At this stage, the shear Design in terms of precast bridge assembly is specific to divide mainly using the shear connector of key teeth formula
For big shear connector and small shear connector.Its deficiency is to need to do concavo-convex corner angle moulding during prefab-form, and construction is complicated, and occlusion
It is not high with spending.Therefore, it is necessary to which a kind of new male and female pairing steel shear connector, melts forged steel iron easy-formation, component precision can arrive millimeter,
High with degree, pre-buried processing can avoid problem above without the special careful processing of template,
The content of the invention
The present invention proposes a kind of precast assembly bent cap structure and construction method using steel shear connector, and the structure is using new
The steel shear connector of male and female pairing, and applied in the precast assembly construction of bent cap.The construction not only facilitates assembled positioning, Er Qieke
To improve the shear resistance of Mosaic face.
To achieve the above object, the technical scheme is that：A kind of precast assembly bent cap structure using steel shear connector,
Concrete component including steel shear connector, prefabricated bent cap, pass through pre-buried steel shear connector between the concrete component of prefabricated bent cap
Connection, each steel shear connector are made up of male shear connector and the pairing use of parent form shear connector；Male shear connector and parent form shear connector
Crescent moon line is provided with concrete surface, for producing mechanical snap power between the concrete component of prefabricated bent cap；It is described
Injected hole is provided with parent form shear connector tail end, injected hole is connected to the outside of the concrete component of prefabricated bent cap by pvc pipe, side
Just the seam of slip casting closure tolerance parent form shear connector.
The steel shear connector is formed by spheroidal graphite cast-iron or carbon constructional quality steel casting.
A kind of construction method of precast assembly bent cap using steel shear connector, is concretely comprised the following steps：
Step 1, the template construct of prefabricated bent cap
Prefabricated bent cap is divided into three section concrete component A, B, C, and erecting template respectively；
Step 2, pre-buried steel shear connector and casting concrete
In the stitching portion of two plug-in concrete component A, C prefab-form, the pre-buried interlude of parent form shear connector 2 is mixed
The pre-buried male shear connector in stitching portion of native component B prefab-form is coagulated, with level meter to horizontal direction position correction, cuts male
Power key and parent form shear connector are matched and coincide, then are fixed with reinforcement location, prevent from misplacing during concreting；Then coagulation
Soil pours, and during concreting since at steel shear connector, two stage cultivation pours, and ensures preform lid beam quality；
Step 3, the concrete component of hoisting prefabricated bent cap
1）Lift concrete component B：The concrete component B of crane hanging component interlude, according to predetermined bridge pier 7 and centre
Section assembling scheme, slowly lay up to being completely attached to bridge pier 7, recall crane, cement grout is injected in assembled interface position
Closing；
2）Lift concrete component A, C：Crane lifts concrete component A, C simultaneously, is applied at three sections of member interfaces
Brush epoxy resin, using male and female shaped steel shear connector as calibration point, parent form shear connector is docked with male shear connector and assigned, has been docked
Cheng Hou, stop the lifting work of crane；
Step 4, tensioning first stage presstressed reinforcing steel
Preprepared presstressed reinforcing steel is pierced along concrete component mesopore and put, using post stretching both ends tension reinforcing steel bar,
Tensioning first stage presstressed reinforcing steel simultaneously anchors, and is brought into close contact concrete component A, C and concrete component B, then removes lifting
Machine, the prestressed pore passage slip casting closing to the first stage；
Pneumatic mortar machine is connected by step 5, shear connector joint treatment using small leather hose with PVC pipeline, and interface is fixed with fixture
Prevent that leather hose departs from PVC pipeline under high pressure conditions, starts pneumatic mortar machine and is opened to PVC pipeline inner high voltage Epoxy Resin For Automatic Pressure Gelation Process, until
Seam crossing of the slurries along concrete component A and concrete component B, concrete component A and concrete component C oozes out, and closes mud jacking
Machine, small leather hose is removed, erasing cleaning is done to the resin liquid oozed out；
Step 6, tensioning second stage presstressed reinforcing steel
Block is laid on concrete component A, C, anti-shock rubber support base is laid on concrete component A, B, C, then tensioning
Second stage presstressed reinforcing steel, prestressing force hole slip casting closing, sealing off and covering anchorage and seam are finally completed, complete whole assembled process.
The beneficial effects of the invention are as follows：It is prefabricated in bent cap using new male and female pairing steel shear connector on precast assembly bent cap
It is pioneering in terms of assembling technique shearing resistance construction.The large and small shear connector difference of key teeth formula used with general prefabricated bridge exists
In：Shear connector needs in the present invention are pre-buried, reduce complicated journey of the large and small shear connector of tradition in prefabrication phase template construct
Degree；By the way of male and female pairing, the position in hoisting process is not only facilitated to determine, and more efficiently between promotion component
Occlusion.
The present invention has following advantage in practical engineering application：Steel shear connector structure casts easy-formation, and dimensional accuracy is high, hangs
The matching degree for filling splicing is high；In the case of reasonable in design, spheroidal graphite cast-iron or carbon constructional quality steel casting can be used to form；
Shear connector is directly embedded in assembling members, and the requirement made to template refinement is low, and template material is saved in work is produced in batches
Material and a large amount of human resources；Tension of prestressed tendon anchorage style, shorten the working time needed for traditional Cast-in-place Bent Cap, it is whole, big,
On middle or long line grade separation science of bridge building, engineering total lever factor is greatly shortened, lifts aging performance；The shear connector docking of male and female pairing,
The effect of interim fulcrum is not only acted as, while the function of thering is key teeth to be engaged, greatly improve Mosaic face shearing resistance reliability.
Brief description of the drawings
Fig. 1 is male and female pairing type steel shear connector structure schematic diagram；
Fig. 2 is Fig. 1 top view；
Fig. 3 is precast assembly bent cap overall structure diagram；
Fig. 4 is place's close-up schematic view of being punctuated in Fig. 3；
Fig. 5 is top view at concrete component A, B interface；
Fig. 6 is concrete component A interface schematic diagrames；
Fig. 7 is the FB(flow block) of the construction method of the precast assembly bent cap using steel shear connector of the present invention.
Embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in Figures 1 to 6, the precast assembly bent cap structure of the invention using steel shear connector, including prefabricated bent cap
Concrete component, steel shear connector, injected hole 4, PVC pipeline 5 etc..Cut between the concrete component of prefabricated bent cap by pre-buried steel
Power key connection, single steel shear connector are divided into male shear connector 1 and parent form shear connector 2, and the boss on male shear connector 1 is cut with parent form
Groove male and female pairing connection on power key 2, steel shear connector are formed by spheroidal graphite cast-iron or carbon constructional quality steel casting；Male shears
Key 1 and parent form shear connector 2 on concrete surface with having crescent moon line 3, it is therefore an objective to machinery is produced between concrete component A, B, C
Snap-in force；There is injected hole 4 at the tail end of parent form shear connector 2, injected hole 4 is connected to outside concrete component A, C by PVC pipeline 5
Side, facilitate the seam 6 of slip casting closing male and female shear connector.
As shown in fig. 7, the construction method of the precast assembly bent cap using steel shear connector of the present invention, with longitudinal overall length 31m
Prefabricated bent cap exemplified by, the present invention in prefabricated bent cap by tri- sections of components of concrete component A, B, C（Fig. 3）, construction procedure and will
Ask as follows：
A, prefabricated bent cap is divided into concrete component A, B, C tri- into section, it is prefabricated that three one-tenth sections set up template respectively, concrete
Component A, C are two plug-in sections, and the pre-buried parent form shear connector 2 in stitching portion, concrete component B is interlude, and the pre-buried male in stitching portion is cut
Power key 1, pre-buried position is only in compressive zone domain；Steel shear connector is needed with level meter to horizontal direction position school when pre-buried
Standard, it is connected with PVC pipeline 5 at the tail end injected hole 4 of parent form shear connector 2, with reinforcing bar to steel shear connector and the fixed position of PVC pipeline 5,
Prevent from misplacing during concreting；When pouring since at steel shear connector, two stage cultivation pours, and ensures preform lid beam
Quality；Component leaves three layers as shown in Figure 6 symmetrical presstressed reinforcing steel duct S in prefabrication process, and presstressed reinforcing steel sleeve pipe uses modeling
Expect bellows.
B, behind component conveying to assembling construction scene, first with the concrete component B of crane hanging component interlude, handed over bridge pier
Interface brushwork epoxy resin makees tack coat, after finding assembled position accurately, slowly lay until with bridge pier 7 it is completely assembled, recall lifting
Device, in interface position injection cement grout closing.
C, concrete component A, C are lifted simultaneously using crane, the brushwork epoxy resin at three sections of member interfaces, with
Male and female type shear connector 1,2 is calibration point, and parent form shear connector 2 is docked with male shear connector 1 and assigned, and after the completion of docking, is stopped
The lifting work of heavy-duty machine；
D, prestress wire is interted along three layers of symmetrical presstressed reinforcing steel duct S hole, steel beam specification is used uniformly 15- ф
S15.20 steel strand wires, using the tensioning of post stretching both ends, tensioning first stage presstressed reinforcing steel, anchor plate must hang down with steel beam center line
Directly, the symmetrical tensioning in both ends, double-direction control tension stress and elongation, fixed anchorage, make concrete component A, C and concrete component
B is brought into close contact, and removes hoisting apparatus, the prestressed pore passage slip casting closing to the first stage, strength of cement grout C45；
E, small-sized pneumatic mortar machine is connected with PVC pipeline 5 using rubber tube, interface is fixed with fixture prevents high pressure conditions
Lower leather hose departs from PVC pipeline 5, starts pneumatic mortar machine and is opened to the inner high voltage Epoxy Resin For Automatic Pressure Gelation Process of PVC pipeline 5, until slurries are along coagulation
Native component A, B, concrete component A, C seam crossing ooze out, and close pneumatic mortar machine, remove small leather hose, the resin liquid oozed out is wiped
Cleaning；
F, block 8 and anti-shock rubber support base 9 in laying as shown in Figure 3, after block 8 completes assembly, antidetonation rubber is installed
Glue bearing needs to be symmetrically installed from structure centre toward both sides, with post-stretching second stage presstressed reinforcing steel, i.e., the middle the superiors shown in Fig. 6
Presstressed reinforcing steel, anchor plate must in advance should with steel beam median perpendicular, the symmetrical tensioning in both ends, double-direction control tension stress and elongation
Power, which reaches, fixes anchorage after design requirement value, removes hoisting apparatus, mud jacking in duct, strength of cement grout C45, face joint mouth
Brushwork epoxy resin closing and sealing off and covering anchorage.
Claims (2)
1. a kind of construction method of precast assembly bent cap structure using steel shear connector, the precast assembly lid of the steel shear connector of use
Girder construction includes steel shear connector, the concrete component of prefabricated bent cap, passes through pre-buried steel between the concrete component of prefabricated bent cap
Key connection is sheared, each steel shear connector is made up of male shear connector (1) and parent form shear connector (2) pairing use；Male shear connector
(1) and parent form shear connector (2) and concrete surface are provided with crescent moon line (3), for the concrete component with prefabricated bent cap it
Between produce mechanical snap power；Injected hole (4) is provided with parent form shear connector (2) tail end, injected hole (4) passes through PVC pipeline (5)
Being connected to the concrete component of prefabricated bent cap has outside, facilitates the seam (6) of slip casting closure tolerance parent form shear connector, and its feature exists
In concretely comprising the following steps：
Step 1, the template construct of prefabricated bent cap
Prefabricated bent cap is divided into three section concrete component A, B, C, and erecting template respectively；
Step 2, pre-buried steel shear connector and casting concrete
In the pre-buried parent form shear connector (2) in the stitching portion of two plug-in concrete component A, C prefab-form, the coagulation of interlude
The pre-buried male shear connector (1) in stitching portion of native component B prefab-form, with level meter to horizontal direction position correction, makes male
Shear connector (1) and parent form shear connector (2) are matched and coincide, then are fixed with reinforcement location, prevent from misplacing during concreting；
Then concreting, during concreting since at steel shear connector, two stage cultivation pours, and ensures preform lid beam matter
Amount；
Step 3, the concrete component of hoisting prefabricated bent cap
1）Lift concrete component B：The concrete component B of crane hanging component interlude, according to predetermined bridge pier (7) and interlude
Assembling scheme, is slowly laid until with bridge pier (7) full contact, recalls crane, and cement grout is injected in assembled interface position
Closing；
2）Lift concrete component A, C：Crane lifts concrete component A, C simultaneously, and brush ring is applied at three sections of member interfaces
Oxygen tree fat, with male and female type shear connector（1,2）For calibration point, parent form shear connector (2) is docked with male shear connector (1) and assigned, it is right
After the completion of connecing, stop the lifting work of crane；
Step 4, tensioning first stage presstressed reinforcing steel
Preprepared presstressed reinforcing steel is pierced along concrete component mesopore and put, using post stretching both ends tension reinforcing steel bar, tensioning
First stage presstressed reinforcing steel simultaneously anchors, and is brought into close contact concrete component A, C and concrete component B, then removes crane,
Prestressed pore passage slip casting closing to the first stage；
Step 5, shear connector joint treatment
Pneumatic mortar machine is connected with PVC pipeline (5) using small leather hose, interface fixed with fixture prevent under high pressure conditions leather hose with
PVC pipeline (5) departs from, and starts pneumatic mortar machine and is opened to PVC pipeline (5) inner high voltage Epoxy Resin For Automatic Pressure Gelation Process, until slurries are along concrete structure
Part A and concrete component B, concrete component A and concrete component C seam crossing ooze out, and close pneumatic mortar machine, remove small leather hose,
Erasing cleaning is done to the resin liquid oozed out；
Step 6, tensioning second stage presstressed reinforcing steel
Block (8) is laid on concrete component A, C, anti-shock rubber support base (9) is laid on concrete component A, B, C, then opens
Second stage presstressed reinforcing steel is drawn, finally completes prestressing force hole slip casting closing, sealing off and covering anchorage and seam, completes whole assembled process.
2. the construction method of the precast assembly bent cap structure according to claim 1 using steel shear connector, it is characterised in that：
The steel shear connector is formed by spheroidal graphite cast-iron or carbon constructional quality steel casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610704462.0A CN106320162B (en) | 2016-08-22 | 2016-08-22 | Using the precast assembly bent cap structure and construction method of steel shear connector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610704462.0A CN106320162B (en) | 2016-08-22 | 2016-08-22 | Using the precast assembly bent cap structure and construction method of steel shear connector |
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| CN106320162A CN106320162A (en) | 2017-01-11 |
| CN106320162B true CN106320162B (en) | 2018-01-26 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108560819A (en) * | 2018-05-30 | 2018-09-21 | 中国建筑第八工程局有限公司 | Box beam is adjustable Alveolus type connecting node and its construction method |
| CN109853362B (en) * | 2019-03-29 | 2021-02-26 | 上海应用技术大学 | Temporary prestressed anchoring segmented prefabricated capping beam and temporary prestress applying method |
| CN110106779A (en) * | 2019-05-05 | 2019-08-09 | 北京市市政专业设计院股份公司 | A kind of prefabrication type bent cap and its construction method |
| CN111851323B (en) * | 2020-07-07 | 2022-03-22 | 汕头大学 | Construction process for manufacturing concrete joint structure |
| CN112458925A (en) * | 2020-12-02 | 2021-03-09 | 中交路桥建设有限公司 | Segment precast beam structure and construction method for splicing and combining bridge thereof |
| CN113931057B (en) * | 2021-03-19 | 2023-01-24 | 宁波市政工程建设集团股份有限公司 | Tenon-and-mortise connected prefabricated small box girder type hidden cover beam and construction method thereof |
| CN113684751B (en) * | 2021-08-16 | 2022-12-30 | 北京市市政一建设工程有限责任公司 | Prefabricated bridge and construction process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5771518A (en) * | 1989-06-16 | 1998-06-30 | Roberts; Michael Lee | Precast concrete bridge structure and associated rapid assembly methods |
| CN1316127C (en) * | 2004-05-27 | 2007-05-16 | 同济大学 | Totally assembled type prefabricated concrete structure system |
| CN103194983A (en) * | 2013-04-26 | 2013-07-10 | 上海市城市建设设计研究总院 | Segmental precast assembly method and segmental precast assembly structure for cantilever arm of large capping beam |
| CN203451986U (en) * | 2013-09-13 | 2014-02-26 | 上海市城市建设设计研究总院 | Full-prefabricated assembly bent cap |
| CN103603435B (en) * | 2013-12-06 | 2015-11-04 | 金陵科技学院 | A kind of assembly concrete antidetonation beam column frame and construction method thereof |
| CN105484109B (en) * | 2015-11-21 | 2017-04-12 | 隔而固(青岛)振动控制有限公司 | Easy-to-assemble floating track bed precast slab and application thereof |
| CN205329526U (en) * | 2016-01-19 | 2016-06-22 | 张正东 | Pier is assembled to precast concrete |
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