CN205205654U - Seam construction of precast concrete festival segmentation bridge - Google Patents

Seam construction of precast concrete festival segmentation bridge Download PDF

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Publication number
CN205205654U
CN205205654U CN201520991667.2U CN201520991667U CN205205654U CN 205205654 U CN205205654 U CN 205205654U CN 201520991667 U CN201520991667 U CN 201520991667U CN 205205654 U CN205205654 U CN 205205654U
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China
Prior art keywords
seam
connecting reinforcement
bridge
prefabricated
construction
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Expired - Fee Related
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CN201520991667.2U
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Chinese (zh)
Inventor
管曼羽
魏建东
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Zhengzhou University
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Zhengzhou University
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Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a seam construction of precast concrete festival segmentation bridge belongs to the bridge engineering field. The utility model discloses an on the basis that does not basically change conventional used template, at prefabricated lug in section both ends and corresponding recess to reserve connecting reinforcement's pore on the lug. After the festival section concatenation, penetrate connecting reinforcement in reserving the pore, and the anchor. Festival section junction extrusion is inseparable, and the shear strength of seam is high between prefabricated segment, has strengthened the anti -bending strength of the roof beam body to the fracture of seam bottom has been delayed. Even the crack appears, connecting reinforcement also can prevent fissured extension effectively to improve the bearing capacity of the roof beam body. Compared with prior art, construction convenience should construct, and the bridge wholeness that adopts this structure to build up is good.

Description

A kind of seam construction of concrete prefabricated sectional type bridge
Technical field
The utility model relates to a kind of seam construction of concrete prefabricated sectional type bridge, belongs to bridge engineering field.
Background technology
The precast assembly construction method of bridge is that beam body is divided into some sections, is transported to bridge location and carries out spelling after precast yard is prefabricated, becomes a kind of construction method of Medium Span beam bridge.Due to prefabricated in advance in factory, little to job site interference, speed of application is than very fast, beam weight is easily controlled, to the long bridge more than 2 kilometers of bridge and urban elevated bridge particularly applicable, being used widely in recent years, is the important development direction of following bridge construction.When adopting segmentation construction, the seam between its prefabricated subsection generally adopts wet seam and stem grafting seam.Wet seam adopts the mode of concreting to connect, and wet seam connects by plain bars, and seam connects, but concrete curing is long, costly; Epoxy glue stretch-draw prestressing force connection is again smeared in the employing of stem grafting seam, and the easy construction of stem grafting seam, accelerates speed of application, save the duration, reduce expense, obtain a large amount of popularizations.
But when adopting stem grafting seam, because girder is discontinuous in seam region, the plain bars that can transmit a part of normal stress and shear stress disconnects herein, the shear connector only arranged by seam crossing and prestressed strand are to be connected each sections, and the length of single sections is shorter, each is across interior seam One's name is legion, therefore intersegmental seam is the weak link of structure stress, and the mechanical behavior of seam directly affects the overall performance of full-bridge.If process bad, the moisture in air and acid ingredient enter seam, can cause structure durability can be poor; Or along with the increase of vehicle flowrate on road, and the increasing of overloaded vehicle, damage can be caused to the seam between sections.Generally take the form of hinge seam bottom first to ftracture, weakening the connection between sections, there is crack in seam.Rainwater infiltrates seam inside from bridge floor, and seam force transfer capacity reduces, and each sections is worked in coordination with supporting capacity and weakened, and crack is constantly upwards carried out, and very easily forms through crack from bottom to top.When acquiring a certain degree, can rupture between sections, and cause vehicle in company with falling down from the bridge.Therefore, in the urgent need to a kind of seam construction of new precast spliced girder segment, strengthen the globality of bridge, prevent the generation of through crack from bottom to top.
Summary of the invention
The purpose of this utility model is to solve above-mentioned the deficiencies in the prior art and problem, provides a kind of seam construction of concrete prefabricated sectional type bridge, and whole bridge superstructure vertical section schematic diagram as shown in Figure 1.The seam construction of novel prefabricated subsection formula concrete-bridge is formed by adjacent Precast Concrete Segmental Bridges, comprise projection and the groove of two prefabricated subsection connections, and the bonding colloid between them, projection is reserved with the vertical duct of connecting reinforcement, in reserving hole channel, is installed with connecting reinforcement.Closely, projection and groove are engaged the extruding of sections junction mutually, and the overall performance of bridge is good, improves shear resistance, enhance anti-bending strength and the bottom tensile property of beam body, and have delayed the cracking bottom seam.Even if there is crack, connecting reinforcement also can stop the expansion in crack effectively, thus improves the bearing capacity of structure.
Further, connecting reinforcement is high-strength prestress reinforcing bar, in connecting reinforcement and sections upper and lower surface joint, is furnished with pre-embedded steel slab.Reinforcing bar can be high strength cast iron, finish rolling deformed bar etc., makes the surface extruding of the projection of bottom and groove tight, effective formation and the expansion stoping crack.
Further, in reserving hole channel, the circumfusion of connecting reinforcement has mortar or chemical bond material.Chemical bond material can adopt polyurethane or modified epoxy structure glue.Reinforcing bar is connected with cell walls closely, and structural integrity is good, and improve the bearing capacity of structure, reinforcing bar is not perishable.
Between sections reinforcing bar can adopt U-shaped reinforcing bar etc.At web place, transversely arrange connecting reinforcement with being longitudinally furnished with more.The front end of projection also can be made into has certain angle with plumb line, makes whole seam construction be skewed.
Compared with prior art, the utility model has following beneficial effect:
1. this form prefabricated joint seam structure improves the shear resistance of seam, and the overall performance of bridge is good, improves the bending resistance of seam crossing simultaneously, makes seam no longer become the stressed plane of weakness of girder;
2. sections makes and still utilizes conventional template, and work of changing is minimum, does not increase prefabricated difficulty;
3. this form only need increase pre-embedded steel slab and connecting reinforcement, and the Master Cost of increase is insignificant;
4. stretch-draw vertical prestressing is conventional prestressing force operation, and constructing operation is simple;
5. avoid the easy cracking phenomena of seam between two segment, prevent crack through, even if there is crack, connecting reinforcement also can stop the expansion in crack effectively, takes full advantage of the general principle of fracture mechanics, improves the anti-crack ability of seam.
Accompanying drawing explanation
Fig. 1 is the vertical section schematic diagram crossing connecting reinforcement of embodiment one correspondence;
Fig. 2 is the partial schematic diagram in embodiment one;
Fig. 3 is the vertical section schematic diagram crossing connecting reinforcement of embodiment two correspondence;
Fig. 4 is U-shaped connecting reinforcement schematic diagram;
In accompanying drawing: 1-prefabricated subsection, 2-projection, 3-groove, 4-duct, 5-connecting reinforcement, 6-seam, 7-pre-embedded steel slab, 8-U-shaped connecting reinforcement.
Detailed description of the invention
Be below specific embodiment of the utility model, and by reference to the accompanying drawings the technical solution of the utility model be described, but the utility model is not limited to these embodiments.
Embodiment one
This embodiment adopts the segmental joints form shown in Fig. 1 and Fig. 2, and wherein Fig. 2 is the partial schematic diagram bottom seam.Fig. 1 comprises two adjacent prefabricated subsections (1), prefabricated subsection (1) two ends are prefabricated with a projection (2) and corresponding groove (3) respectively, the front end face of projection (2) is a vertical plane, and it has vertical duct (4), projection (2) upper and lower surface and horizontal plane angle are 20 degree.Seam construction longitudinally has two round roads (4) at bridge, has three round roads (4) at the direction across bridge of same web.Seam (6) between vertical projection (2) and groove (3) adopts modified epoxy structure glue bonding.After prefabricated subsection (1) glueds joint, penetrate the connecting reinforcement (5) that finish rolling deformed bar makes in duct (4), there is pre-embedded steel slab (7) connecting reinforcement (5) and prefabricated subsection (1) upper and lower surface joint, specifically see Fig. 2.Accordingly, also steel plate is embedded with on the top of prefabricated subsection (1).Adhesive glue in seam (6) is solidified and after reaching desired strength, stretch-draw is also fixedly connected with reinforcing bar (5), pressure injection mortar in the space of duct (4).
Embodiment two
The present embodiment is the correction to embodiment one, adopts the segmental joints form shown in Fig. 3.There is vertical row's 4 projections (2) and a corresponding groove (3) at prefabricated subsection (1) two ends, the duct (4) that projection (2) longitudinally has a row vertical at bridge.Adhesive glue in seam (6) is solidified and after reaching desired strength, stretch-draw is also fixedly connected with reinforcing bar (5), pressure injection modified epoxy structure glue in the space of duct (4).
Embodiment three
The present embodiment is the correction to embodiment one, adopts the U-shaped connecting reinforcement (8) shown in Fig. 4, and turning point, U-shaped connecting reinforcement (8) bottom is circular arc.Two limbs of U-shaped connecting reinforcement (8) penetrate in two longitudinal ducts (4) from the bottom up respectively.The pre-embedded steel slab (7) of bottom and the circular arc knuckle touching position of U-shaped connecting reinforcement (8), also have corresponding circular arc knuckle.

Claims (3)

1. the seam construction of a concrete prefabricated sectional type bridge, formed by adjacent Precast Concrete Segmental Bridges, comprise projection and the groove of two prefabricated subsection connections, and the bonding colloid between them, it is characterized in that: vertical duct projection being reserved with connecting reinforcement, is installed with connecting reinforcement in reserving hole channel.
2. the seam construction of a kind of concrete prefabricated sectional type bridge according to claim 1, is characterized in that: connecting reinforcement is high-strength prestress reinforcing bar, has pre-embedded steel slab at connecting reinforcement and sections upper and lower surface joint.
3. the seam construction of a kind of concrete prefabricated sectional type bridge according to claim 2, is characterized in that: in reserving hole channel, the circumfusion of connecting reinforcement has mortar or chemical bond material.
CN201520991667.2U 2015-12-04 2015-12-04 Seam construction of precast concrete festival segmentation bridge Expired - Fee Related CN205205654U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520991667.2U CN205205654U (en) 2015-12-04 2015-12-04 Seam construction of precast concrete festival segmentation bridge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520991667.2U CN205205654U (en) 2015-12-04 2015-12-04 Seam construction of precast concrete festival segmentation bridge

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106193324A (en) * 2016-07-29 2016-12-07 初明进 A kind of precast concrete method of attachment
CN106223476A (en) * 2016-08-31 2016-12-14 初明进 A kind of precast reinforced concrete structure method of attachment
CN109235637A (en) * 2018-10-22 2019-01-18 北京工业大学 A kind of large span fabricated construction self-balancing tenon-prestressing combination connecting node
CN109440623A (en) * 2018-11-20 2019-03-08 湖南工业大学 The interim splicing structure of concrete segment precast bridge
CN113605217A (en) * 2021-07-08 2021-11-05 同信生态环境科技有限公司 Structure of bridge abutment and roadbed joint and construction method
CN113699869A (en) * 2021-08-13 2021-11-26 浙江瓯越交建科技股份有限公司 Prefabricated bridge plate connecting structure
CN114232460A (en) * 2021-12-16 2022-03-25 中交第二航务工程局有限公司 Prefabricated segment type UHPC T-shaped beam splicing seam and construction method thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106193324A (en) * 2016-07-29 2016-12-07 初明进 A kind of precast concrete method of attachment
CN106223476A (en) * 2016-08-31 2016-12-14 初明进 A kind of precast reinforced concrete structure method of attachment
CN109235637A (en) * 2018-10-22 2019-01-18 北京工业大学 A kind of large span fabricated construction self-balancing tenon-prestressing combination connecting node
CN109440623A (en) * 2018-11-20 2019-03-08 湖南工业大学 The interim splicing structure of concrete segment precast bridge
CN109440623B (en) * 2018-11-20 2023-12-08 湖南工业大学 Temporary splicing structure of precast bridge of concrete segment
CN113605217A (en) * 2021-07-08 2021-11-05 同信生态环境科技有限公司 Structure of bridge abutment and roadbed joint and construction method
CN113699869A (en) * 2021-08-13 2021-11-26 浙江瓯越交建科技股份有限公司 Prefabricated bridge plate connecting structure
CN114232460A (en) * 2021-12-16 2022-03-25 中交第二航务工程局有限公司 Prefabricated segment type UHPC T-shaped beam splicing seam and construction method thereof

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20160504

Termination date: 20171204