CN106320162A - Prefabricated assembly cap beam structure with steel shear keys and construction method - Google Patents
Prefabricated assembly cap beam structure with steel shear keys and construction method Download PDFInfo
- Publication number
- CN106320162A CN106320162A CN201610704462.0A CN201610704462A CN106320162A CN 106320162 A CN106320162 A CN 106320162A CN 201610704462 A CN201610704462 A CN 201610704462A CN 106320162 A CN106320162 A CN 106320162A
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- Prior art keywords
- shear connector
- concrete component
- steel
- bent cap
- male
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Classifications
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- 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 invention relates to a prefabricated assembly cap beam structure with steel shear keys and a construction method. The steel shear keys of the prefabricated assembly cap beam structure adopt female and male pairing type shear keys, and are formed by casting nodular cast iron or high-quality carbon structural steel. The construction method comprises the following steps of dividing a cap beam into members which are respectively prefabricated in three sections, embedding a female type shear key at a splicing part of two outer hanging sections, and embedding a male type shear key at a splicing part of a middle section; enabling a crane to respectively lift the member in the middle section and the members in the two outside sections, calibrating positions, penetrating and tensioning a prestressed reinforcement in a first phase to connect the three sections into a whole, and completing the grouting, sealing and anchoring of a prestressed hole passage; by utilizing the reserved grouting hole passage, grouting the interior of the female type steel shear key at high pressure, and treating a joint between the female and male shear keys. Compared with the prior art, the prefabricated assembly cap beam structure and the construction method have the advantages that the complexity of formwork manufacturing in the prefabricating phase of the traditional large and small shear keys is decreased; by adopting the female and male pairing type, the positions in the lifting process are conveniently determined, and the engaging between the members is effectively promoted.
Description
Technical field
The present invention relates to a kind of preform lid girder construction, a kind of preform lid girder construction using steel shear connector and construction
Method.
Background technology
The cast-in-place construction of concrete-bridge, needs substantial amounts of template and support system, under bad execution conditions, sets up full
Hall mount approach is infeasible.Coping Construction belongs to work high above the ground, and cast-in-place a large amount of concrete, construction risk is big.Use precast assembly
The mode of bent cap can accelerate speed of application, it is ensured that quality, simultaneously takes account of scale effect and has good economy.
Present stage, the shear Design in terms of precast bridge assembly mainly uses the shear connector that key is tooth-like, specifically divides
For big shear connector and little shear connector.Its deficiency is during prefab-form to need to do concavo-convex corner angle moulding, construction complexity, and occlusion
Degree of joining is the highest.Accordingly, it would be desirable to a kind of novel male and female pairing steel shear connector, molten forged steel ferrum easy-formation, component precision can arrive millimeter,
Joining degree high, pre-buried process, without the special careful process of template, can avoid problem above.
Summary of the invention
The present invention proposes a kind of precast assembly bent cap structure using steel shear connector and construction method, and this structure uses novel
The steel shear connector of male and female pairing, and be applied in the precast assembly construction of bent cap.This structure not only convenient assembly location, Er Qieke
To improve the shear resistance of Mosaic face.
For achieving the above object, the technical scheme is that a kind of precast assembly bent cap structure using steel shear connector,
Including steel shear connector, the concrete component of prefabricated bent cap, by pre-buried steel shear connector between the concrete component of prefabricated bent cap
Connecting, each steel shear connector is made up of male shear connector and the pairing use of parent form shear connector；Male shear connector and parent form shear connector
It is provided with crescent moon stricture of vagina with concrete surface, is used for producing mechanical snap power between the concrete component of prefabricated bent cap；Described
Being provided with injected hole at 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.
Described steel shear connector is cast by spheroidal graphite cast-iron or carbon constructional quality steel and forms.
The construction method of a kind of precast assembly bent cap using steel shear connector, concretely comprises the following steps:
Step one, 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
The concrete of stitching portion pre-buried parent form shear connector 2 interlude at the prefab-form of two plug-in concrete component A, C
The stitching portion pre-buried male shear connector of the prefab-form of component B, by level indicator to horizontal direction position correction, makes male shear connector
Match with parent form shear connector and coincide, then fixing with reinforcement location, preventing from misplacing during concreting；Then concrete waters
Building, during concreting from the beginning of at steel shear connector, two stage cultivation pours, it is ensured that preform lid beam quality；
Step 3, the concrete component of hoisting prefabricated bent cap
1) lift the concrete component B of concrete component B: crane hanging component interlude, spell with interlude according to predetermined bridge pier 7
Dress scheme, slowly laying until completely attaching to bridge pier 7, recalling crane, closes in assembled interface position injection water slurry liquid；
2) lifting concrete component A, C: crane lifts concrete component A, C simultaneously, is coated with brush ring at three sections of member interface
Epoxy resins, with male and female shaped steel shear connector as calibration point, docks parent form shear connector with male shear connector and assigns, after having docked,
Stop the lifting work of crane；
Step 4, stretch-draw first stage presstressed reinforcing steel
Preprepared presstressed reinforcing steel is pierced along concrete component mesopore and puts, use post stretching two ends tension reinforcing steel bar, stretch-draw
First stage presstressed reinforcing steel also anchors, and makes concrete component A, C fit tightly with concrete component B, then removes crane,
Prestressed pore passage slip casting to the first stage is closed；
Step 5, shear connector joint treatment utilizes little leather hose to be connected with PVC pipeline by pneumatic mortar machine, and seam fixture is fixing to be prevented
High pressure conditions hypodermis tube and tube road departs from, and starts pneumatic mortar machine and is opened to pipeline inner high voltage Epoxy Resin For Automatic Pressure Gelation Process, until serosity is along coagulation
Soil component A and concrete component B, concrete component A ooze out with the seam crossing of concrete component C, close pneumatic mortar machine, take off cuticle
Pipe, does erasing cleaning to the resin liquid oozed out；
Step 6, stretch-draw second stage presstressed reinforcing steel
Concrete component A, C lay block, concrete component A, B, C lay box beam holder base plate, then stretch-draw second
Stage presstressed reinforcing steel, finally completes prestressing force hole slip casting closing, sealing off and covering anchorage and seam, completes whole assembled process.
The invention has the beneficial effects as follows: on precast assembly bent cap, use novel male and female pairing steel shear connector, prefabricated at bent cap
Assembling technique shearing resistance structure aspect is pioneering.Large and small shear connector difference tooth-like with the key that general prefabricated bridge uses exists
In: the shear connector in the present invention needs pre-buried, reduces traditional large and small shear connector complicated journey at prefabrication phase template construct
Degree；Use the mode of male and female pairing, not only facilitate the position in hoisting process to determine, and more efficiently promote between component
Occlusion.
The present invention has following advantage in practical engineering application: steel shear connector structure casting readily molding, dimensional accuracy is high, hangs
The matching degree of dress 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 making template refinement is low, saves template material in batch production work
Material and a large amount of human resourcess；Tension of prestressed tendon anchorage style, shortens the working time needed for tradition Cast-in-place Bent Cap, omnidistance, big,
On middle or long line grade separation science of bridge building, greatly shorten engineering total lever factor, promote aging performance；The shear connector docking of male and female pairing,
Not only act as the effect of interim fulcrum, the function simultaneously having key tooth to be engaged, be greatly improved Mosaic face shearing resistance reliability.
Accompanying drawing explanation
Fig. 1 is male and female pairing type steel shear connector structure schematic diagram；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is precast assembly bent cap overall structure schematic diagram；
Fig. 4 is place's close-up schematic view of punctuating in Fig. 3；
Fig. 5 is top view at concrete component A, B interface；
Fig. 6 is concrete component A interface schematic diagram；
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.
Detailed description of the invention
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 using steel shear connector of the present invention, including prefabricated bent cap
Concrete component, steel shear connector, injected hole 4, pvc pipe 5 etc..By pre-buried steel shearing between the concrete component of prefabricated bent cap
Bonded, single steel shear connector is divided into male shear connector 1 and parent form shear connector 2, the boss on male shear connector 1 and parent form shearing
Groove male and female pairing on key 2 connects, and steel shear connector is cast by spheroidal graphite cast-iron or carbon constructional quality steel and forms；Male shear connector
1 and parent form shear connector 2 have crescent moon stricture of vagina 3 on concrete surface, it is therefore an objective to and produce machinery between concrete component A, B, C and sting
Make a concerted effort；Injected hole 4, injected hole 4 is had to be connected to outside concrete component A, C by pvc pipe 5 at parent form shear connector 2 tail end, side
Just the seam 6 of male and female shear connector is closed in slip casting.
As it is 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 as a example by, the prefabricated bent cap in the present invention by tri-sections of components (Fig. 3) of concrete component A, B, C, construction procedure and wanting
Ask as follows:
A, prefabricated bent cap being divided into concrete component A, B, C tri-section of one-tenth, it is prefabricated that three one-tenth sections set up template respectively, concrete component
A, C are two plug-in sections, stitching portion pre-buried parent form shear connector 2, and concrete component B is interlude, stitching portion pre-buried male shear connector
1, pre-buried position is only in territory, compressive zone；Steel shear connector needs by level indicator horizontal direction position correction when pre-buried, female
It is connected with pvc pipe 5 at type shear connector 2 tail end injected hole 4, with reinforcing bar to steel shear connector and pvc pipe fixed position, prevents concrete
Misplace when pouring；When pouring from the beginning of at steel shear connector, two stage cultivation pours, it is ensured that preform lid beam quality；Component
All leaving three layers of symmetrical presstressed reinforcing steel duct S as shown in Figure 6 in prefabrication process, presstressed reinforcing steel sleeve pipe uses plastic film capicitor.
B, component conveying, to behind assembling construction scene, first with the concrete component B of crane hanging component interlude, are handed over bridge pier
Interface brushwork epoxy resin makees tack coat, after finding assembled position accurately, slowly lays until assembly complete with bridge pier 7, recalls lifting
Device, closes in interface position injection water slurry liquid.
C, use crane lift concrete component A, C simultaneously, brushwork epoxy resin at three sections of member interface, with
Male and female type shear connector 1,2 is calibration point, is docked with male shear connector 1 by parent form shear connector 2 and assigns, after having docked, stops
The lifting work of heavy-duty machine；
D, hole along three layers of symmetrical presstressed reinforcing steel duct S intert prestress wire, and steel beam specification is used uniformly across 15-ф
S15.20 steel strand wires, use the stretch-draw of post stretching two ends, stretch-draw first stage presstressed reinforcing steel, and anchor plate must hang down with steel bundle center line
Directly, two ends symmetry stretch-draw, double-direction control tension stress and elongation, fixing anchorage, make concrete component A, C and concrete component
B fits tightly, and removes hoisting apparatus, and the prestressed pore passage slip casting to the first stage is closed, and strength of cement grout is C45；
E, utilizing rubber tube to be connected with PVC pipeline 5 by small-sized pneumatic mortar machine, seam fixture is fixing prevents high pressure conditions hypodermis
Tube and tube road 5 departs from, start pneumatic mortar machine be opened to pipeline 5 inner high voltage Epoxy Resin For Automatic Pressure Gelation Process, until serosity along concrete component A, B,
Concrete component A, C seam crossing oozes out, and closes pneumatic mortar machine, takes off little leather hose, and the resin liquid oozed out is done erasing cleaning；
F, lay as shown in Figure 3 in block 8 and anti-shock rubber support base 9, after block 8 completes assembly, install antidetonation rubber prop up
Seat needs to install toward lateral symmetry from structure centre, and with post-stretching second stage presstressed reinforcing steel, i.e. shown in Fig. 6, the middle the superiors in advance should
Power muscle, anchor plate must be with steel bundle median perpendicular, and two ends symmetry stretch-draw, double-direction control tension stress and elongation, prestressing force reaches
Fixing anchorage after design required value, remove hoisting apparatus, mud jacking in duct, strength of cement grout is C45, face joint mouth brushing
Epoxy resin sealing sealing off and covering anchorage.
Claims (3)
1. use a precast assembly bent cap structure for steel shear connector, including steel shear connector, the concrete component of prefabricated bent cap, in advance
Connected by pre-buried steel shear connector between the concrete component of bent cap processed, it is characterised in that: each steel shear connector is cut by male
Power key (1) and parent form shear connector (2) pairing use and constitute；Male shear connector (1) and parent form shear connector (2) and concrete surface
It is provided with crescent moon stricture of vagina (3), is used for producing mechanical snap power between the concrete component of prefabricated bent cap；Described parent form shear connector
(2) being provided with injected hole (4) at tail end, the concrete component that injected hole (4) is connected to prefabricated bent cap by pvc pipe (5) has outside,
Facilitate the seam (6) of slip casting closure tolerance parent form shear connector.
The precast assembly bent cap structure of employing steel shear connector the most according to claim 1, it is characterised in that: described steel shearing
Key is cast by spheroidal graphite cast-iron or carbon constructional quality steel and forms.
3. the construction method of the precast assembly bent cap using steel shear connector, it is characterised in that concretely comprise the following steps:
Step one, 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
At the stitching portion pre-buried parent form shear connector (2) of the prefab-form of two plug-in concrete component A, C, the coagulation of interlude
The stitching portion pre-buried male steel shear connector (1) of the prefab-form of soil component B, by level indicator to horizontal direction position correction, makes public affairs
Type shear connector (1) and parent form shear connector (2) match and coincide, then fix with reinforcement location, prevent from, during concreting, mistake occurs
Position；Then concreting, during concreting from the beginning of at steel shear connector, two stage cultivation pours, it is ensured that preform lid beam
Quality；
Step 3, the concrete component of hoisting prefabricated bent cap
1) the concrete component B of concrete component B: crane hanging component interlude is lifted, according to predetermined bridge pier (7) and interlude
Assembling scheme, slowly laying until completely attaching to bridge pier (7), recalling crane, in assembled interface position injection water slurry liquid
Close；
2) lifting concrete component A, C: crane lifts concrete component A, C simultaneously, is coated with brush ring at three sections of member interface
Epoxy resins, with male and female type shear connector 1,2 for calibration point, docks parent form shear connector (2) with male shear connector (1) and assigns, docking
After completing, stop the lifting work of crane；
Step 4, stretch-draw first stage presstressed reinforcing steel
Preprepared presstressed reinforcing steel is pierced along concrete component mesopore and puts, use post stretching two ends tension reinforcing steel bar, stretch-draw
First stage presstressed reinforcing steel also anchors, and makes concrete component A, C fit tightly with concrete component B, then removes crane,
Prestressed pore passage slip casting to the first stage is closed；
Step 5, shear connector joint treatment
Utilizing little leather hose to be connected with PVC pipeline (5) by pneumatic mortar machine, seam fixture is fixing prevents high pressure conditions hypodermis tube and tube
Road (5) departs from, and starts pneumatic mortar machine and is opened to pipeline (5) inner high voltage Epoxy Resin For Automatic Pressure Gelation Process, until serosity is along concrete component A and coagulation
Soil component B, concrete component A ooze out with the seam crossing of concrete component C, close pneumatic mortar machine, take off little leather hose, to the tree oozed out
Fat liquid does erasing cleaning；
Step 6, stretch-draw second stage presstressed reinforcing steel
Concrete component A, C lay block (8), concrete component A, B, C lays box beam holder base plate (9), then opens
Draw second stage presstressed reinforcing steel, finally complete prestressing force hole slip casting closing, sealing off and covering anchorage and seam, complete whole assembled process.
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 |
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| 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 true CN106320162A (en) | 2017-01-11 |
| CN106320162B CN106320162B (en) | 2018-01-26 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109853362A (en) * | 2019-03-29 | 2019-06-07 | 上海应用技术大学 | A kind of interim prestress anchoraging prefabricated bent cap of segmentation and interim method for applying prestressing force |
| 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 |
| CN111851323A (en) * | 2020-07-07 | 2020-10-30 | 汕头大学 | Novel concrete joint structure and construction process |
| 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 |
| CN113684751A (en) * | 2021-08-16 | 2021-11-23 | 北京市市政一建设工程有限责任公司 | Prefabricated bridge and construction process thereof |
| CN113931057A (en) * | 2021-03-19 | 2022-01-14 | 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 |
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| 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 |
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| 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 |
| CN111851323A (en) * | 2020-07-07 | 2020-10-30 | 汕头大学 | Novel concrete joint structure and construction process |
| 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 |
| CN113931057A (en) * | 2021-03-19 | 2022-01-14 | 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 |
| CN113684751A (en) * | 2021-08-16 | 2021-11-23 | 北京市市政一建设工程有限责任公司 | Prefabricated bridge and construction process 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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| CN106320162B (en) | 2018-01-26 |
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