CN205576723U - Adoption is excelled in prefabrication of fibre mortar and bellows joint and is assembled pier - Google Patents

Adoption is excelled in prefabrication of fibre mortar and bellows joint and is assembled pier Download PDF

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Publication number
CN205576723U
CN205576723U CN201620120465.5U CN201620120465U CN205576723U CN 205576723 U CN205576723 U CN 205576723U CN 201620120465 U CN201620120465 U CN 201620120465U CN 205576723 U CN205576723 U CN 205576723U
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CN
China
Prior art keywords
corrugated tube
pier
cushion cap
pier shaft
bellows
Prior art date
Application number
CN201620120465.5U
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Chinese (zh)
Inventor
葛继平
郑焕强
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上海应用技术学院
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Priority to CN201620120465.5U priority Critical patent/CN205576723U/en
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Publication of CN205576723U publication Critical patent/CN205576723U/en

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Abstract

The utility model relates to an adoption is excelled in prefabrication of fibre mortar and bellows joint and is assembled pier, including pier shaft, cushion cap, the pier shaft setting is on the cushion cap, and pier shaft central point puts and presets the prestressing tendons bellows, has worn finish rolling twisted steel in the bellows, vertical pre -buried regular steel bar in the pier shaft, regular steel bar lower extreme stretch into set up in the cushion cap drive the bellows of horn mouth in, its tip mound is thick or weld fritter end board, opens and fills the fibre mortar that excels in in the bellows of horn mouth for increase regular steel bar's pull -out resistance. The utility model discloses a setting up the prestressing force spiral at the pier shaft, having improved anti -seismic performance and the runback potential energy after the earthquake power of pier greatly, the pier shaft is indulged the muscle end and is added slightly simultaneously, wears to establish in the cushion cap of bellows horn mouth form, adopts the fibre mortar that excels in to pour into, has also improved the shock resistance when having increased the pull -out resistance of reinforcing bar greatly. The event the utility model discloses be particularly useful for crowning earthquake intensity seismic area, and can be under construction fast, also have of great significance to the post -disaster reconstruction.

Description

Use the precast assembly bridge pier that high-intensity fiber mortar and corrugated tube connect
Technical field
This utility model relates to the assembled bridge pier in a kind of construction of road and bridge, particularly relates to a kind of precast assembly bridge pier using high-intensity fiber mortar and corrugated tube to connect.
Background technology
Concrete is the construction material that current consumption is maximum, and concrete production energy consumption is low, and raw material sources are wide, simple process, with low cost and have the features such as durable, fire prevention strong adaptability, application be convenient.But concrete is in work progress, the discharge of waste gas and dust is bigger, easily causes environmental pollution.Within significant period of time from now on, China is still in extensive civil engineering construction period, and along with to energy-saving and emission-reduction, the requirement of sustainable development improves constantly, the requirement to concrete performance and work progress also will be more and more higher.
The research report that current cement concrete develops to higher intensity is a lot, occurs in that the concrete of more than hundreds of MPa intensity, but some is because price is the highest, and some is because technology of preparing is the most complicated, some then some performance indications decline while intensity improves.Improve merely concrete crushing strength, the deficiency that its fragility is big, tensile strength is low can not be changed.
1994, very-high performance fiber concrete (Ultra High performance fiber
Concrete UHPFC) concept be suggested.Use fibre-reinforced method, create fibre reinforced concrete.Use conventional material and curing condition, can be prepared by the mortar more than 200Mpa, thus have broad application prospects.
Along with increasing severely and the increase of basis means of transportation Years Of Service of the volume of traffic, need the speed of application developing new system and method to improve highway bridge.Prefabricated subsection construction method is one of construction method that can substitute for existing cast-in-situ construction method.Use Precast Concrete Segmental Bridges method can reduce the interference to existing traffic to greatest extent, increase working security, minimizing environmental pollution, increase construction quality, improve speed of application, reduce the cost in the life operation phase.Bridge rapid construction technology, compared with conventional construction technology, can shorten on-site construction time, and the discharge of the waste water and gas dust of work progress can farthest be controlled.Rebar connecting technology is the key technology of prefabrication and assembly construction bridge rapid constructing method, needs to reach the standard of I grade of joint in " mechanical connection technique of reinforcement code " JGJ107.Current existing interconnection technique has the technology such as grout sleeve, mechanical sleeves, and grout sleeve is relatively costly, and mechanical sleeves needs upset reprocessing screw thread, destroys and is likely to occur near the screw thread of processing.Set forth herein the grouting corrugated tube interconnection technique that a kind of applicable cushion cap is connected with pier stud, construction can be met quickly simultaneously, connect the reliable and requirement of industrialized production.
The section assembling test specimen of this type is the highest to the performance requirement of grouting material.I.e. under seismic loading, vertical muscle must not be pulled out from corrugated tube, and before test specimen destroys, grouting material must not occur bond damage.Grouting corrugated tube uses UHPC(Ultra-High Performance Concrete ultra-high performance concrete) as grouting material, match ratio is shown in Table 1,3 days comprcssive strength about 73Mpa, and 7 days comprcssive strength about 85Mpa, within 28 days, comprcssive strength is about 140Mpa.
Table 1 UHPC match ratio
Metal bellows is circular corrugated stainless steel tubing, metal bellows meets the relevant regulations of country working standard " metal bellows for prestressed concrete " JG225, total length is no less than 24ds(ds for connected vertical muscle diameter), internal diameter is not preferably less than the little value of ds+40mm and 3ds.Wall thickness is not preferably less than 0.45mm.
Conventional grouting corrugated tube connection scheme needs enough vertical muscle bond lengths (i.e. the length of corrugated tube), uses UHPC high-intensity fiber concrete that bond length can be obviously reduced, meets the occasion that flat bent cap connects with basis.Anticipated total length can shorten to 18ds.
The important embodiment of design based on performance thought makes component have self-resetting capability exactly, has adopted no-cohesive prestressed reinforcement interconnection technique and bridge pier can be made to produce restoring force under geological process, can be returned to initial position at the end of earthquake.
Summary of the invention
For the drawbacks described above overcoming prior art to exist, this utility model provides a kind of precast assembly bridge pier using high-intensity fiber mortar and corrugated tube to connect.
For achieving the above object, the technical solution of the utility model is: a kind of precast assembly bridge pier using high-intensity fiber mortar and corrugated tube to connect, including pier shaft, cushion cap, pier shaft is arranged on cushion cap, described pier shaft center preset presstressed reinforcing steel corrugated tube, it is installed with finish rolling deformed bar in presstressed reinforcing steel corrugated tube, longitudinal pre-buried regular reinforcement in pier shaft, regular reinforcement lower end is stretched in the corrugated tube arranged in cushion cap, its regular reinforcement end is upset or welds fritter end plate, and the interior perfusion of corrugated tube is for increasing the mortar of the pull-out resistance of regular reinforcement.
Described finish rolling deformed bar end is provided with the big end plate and tie hoop being embedded in cushion cap.Described corrugated tube is for driving bell-mouthed metal bellows.Described mortar is high-intensity fiber mortar.
The beneficial effects of the utility model are:
The precast assembly bridge pier that high-intensity fiber mortar of the present utility model and corrugated tube connect, by being threaded reinforcing bar at pier shaft, substantially increase the self-resetting capability after the anti-seismic performance of bridge pier and earthquake, pier shaft indulges the overstriking of muscle termination simultaneously, it is located in the cushion cap of corrugated tube bell mouth shape, use high-intensity fiber mortar injection, while adding the pull-out resistance of reinforcing bar, also substantially increase shock resistance.Therefore this utility model is particularly suited for middle high intensity Zone, and this utility model energy rapid construction, is also significant post-disaster reconstruction.
Popularization of the present utility model is energy-saving and emission-reduction, the effective way of Air Pollution prevention and control, can promote construction quality, extends the life-span of building, promotes ability of preventing and reducing natural disasters.
Accompanying drawing explanation
Fig. 1 is that the present embodiment uses high-intensity fiber mortar and corrugated tube to connect and has the site plan of precast splice type bridge pier of self-resetting capability.
Fig. 2 is the assembled schematic diagram of the precast splice type bridge pier using high-intensity fiber mortar and corrugated tube to connect and having self-resetting capability,
Wherein: (a) pours into high-intensity fiber mortar schematic diagram for driving bell-mouthed corrugated tube, schematic diagram in bell-mouthed corrugated tube is driven after (b) inserts grouting for reserved vertical muscle.
Detailed description of the invention
Below with reference to accompanying drawing, the technique effect of design, concrete structure and the generation of utility model is described further, to be fully understood from the purpose of this utility model, feature and effect.
As shown in Figure 1, a kind of precast assembly bridge pier using high-intensity fiber mortar and corrugated tube to connect, mortar 5 upset 4 including presstressed reinforcing steel corrugated tube 1, regular reinforcement 2, finish rolling deformed bar 3, regular reinforcement end, opens bell-mouthed corrugated tube 6, cushion cap 7, tie hoop 8, pier shaft 9, bulk end plate 10.
Pier shaft 9 is arranged on cushion cap 7, pier shaft 9 center preset presstressed reinforcing steel corrugated tube 1, finish rolling deformed bar 3 it is installed with in presstressed reinforcing steel corrugated tube 1, longitudinal pre-buried regular reinforcement 2 in pier shaft 9, regular reinforcement 2 lower end stretch in cushion cap 7 arrange open in bell-mouthed corrugated tube 6, its regular reinforcement end upset 4 or weldering fritter end plate, open perfusion mortar 5 in bell-mouthed corrugated tube 6, for increasing the pull-out resistance of regular reinforcement 2.Finish rolling deformed bar 3 end is provided with the bulk end plate 10 and tie hoop 8 being embedded in cushion cap 7.Regular reinforcement 2 is high tensile reinforcement.Mortar 5 is high-intensity fiber mortar.
In this example, pier shaft 9 center arranges prestress pipe 1, and finish rolling deformed bar 3 is arranged in the duct of presstressed reinforcing steel corrugated tube 1, has a bulk of end plate 10 to be mechanically connected with finish rolling deformed bar 3 or weld in cushion cap 7.In pier shaft 9, longitudinally certain distance is stretched out in pre-buried regular reinforcement 2 and bottom, the regular reinforcement end upset 4 of pre-buried pier stud, increases the pull-out resistance of reinforcing bar.Cushion cap 7 is arranged drives bell-mouthed corrugated tube 6, perfusion mortar 5, for increasing the pull-out resistance of reinforcing bar.
When assembly, the first step, as shown in Figure 2 (a) shows, pre-buried in cushion cap 7 open perfusion mortar 5 in bell-mouthed corrugated tube 6;Second step, as shown in Fig. 2 (b), the reserved longitudinal regular reinforcement 2 of pier shaft 9 is pre-buried in inserting cushion cap 7 to be opened in bell-mouthed corrugated tube 6, it is not necessary to mud jacking, the reserved finish rolling deformed bar 3 of cushion cap 7 is arranged in the presstressed reinforcing steel corrugated tube 1 of pier shaft 9, stretch-draw.

Claims (4)

1. one kind uses the precast assembly bridge pier that high-intensity fiber mortar and corrugated tube connect, including pier shaft (9), cushion cap (7), pier shaft (9) is arranged on cushion cap (7), it is characterized in that: described pier shaft (9) center preset presstressed reinforcing steel corrugated tube (1), finish rolling deformed bar (3) it is installed with in presstressed reinforcing steel corrugated tube (1), longitudinal pre-buried regular reinforcement (2) in pier shaft (9), regular reinforcement (2) lower end is stretched in the corrugated tube (6) arranged in cushion cap (7), its regular reinforcement end upset (4) or weldering fritter end plate, in corrugated tube (6), perfusion is used for increasing the mortar (5) of the pull-out resistance of regular reinforcement (2).
The precast assembly bridge pier that employing high-intensity fiber mortar the most according to claim 1 and corrugated tube connect, it is characterised in that: described finish rolling deformed bar (3) end is provided with the bulk end plate (10) and tie hoop (8) being embedded in cushion cap (7).
The precast assembly bridge pier that employing high-intensity fiber mortar the most according to claim 1 and corrugated tube connect, it is characterised in that: described corrugated tube (6) is for driving bell-mouthed metal bellows.
The precast assembly bridge pier that employing high-intensity fiber mortar the most according to claim 1 and corrugated tube connect, it is characterised in that: described mortar (5) is high-intensity fiber mortar.
CN201620120465.5U 2016-02-15 2016-02-15 Adoption is excelled in prefabrication of fibre mortar and bellows joint and is assembled pier CN205576723U (en)

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CN201620120465.5U CN205576723U (en) 2016-02-15 2016-02-15 Adoption is excelled in prefabrication of fibre mortar and bellows joint and is assembled pier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620120465.5U CN205576723U (en) 2016-02-15 2016-02-15 Adoption is excelled in prefabrication of fibre mortar and bellows joint and is assembled pier

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106906747A (en) * 2016-10-28 2017-06-30 上海市政工程设计研究总院(集团)有限公司 A kind of column and bent cap splicing structure
CN107100078A (en) * 2017-05-19 2017-08-29 中国五冶集团有限公司 A kind of packaged type bridges Precast Pier Columns component installation method
CN107190634A (en) * 2017-06-08 2017-09-22 上海应用技术大学 A kind of method of rapid construction bridge pier after macroseism shifted based on plastic hinge
CN108560423A (en) * 2018-02-05 2018-09-21 四川动和工程咨询有限公司 A kind of construction method of regular reinforcement and finish rolling deformed bar hybrid reinforcement assembly pier
WO2019149270A1 (en) * 2018-02-05 2019-08-08 横琴共轭科技有限公司 Assembled pier for mixed reinforcement of normal steel rebar and finished threaded steel bar

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106906747A (en) * 2016-10-28 2017-06-30 上海市政工程设计研究总院(集团)有限公司 A kind of column and bent cap splicing structure
CN107100078A (en) * 2017-05-19 2017-08-29 中国五冶集团有限公司 A kind of packaged type bridges Precast Pier Columns component installation method
CN107190634A (en) * 2017-06-08 2017-09-22 上海应用技术大学 A kind of method of rapid construction bridge pier after macroseism shifted based on plastic hinge
CN107190634B (en) * 2017-06-08 2018-12-21 上海应用技术大学 A method of rapid construction bridge pier after the macroseism based on plastic hinge transfer
CN108560423A (en) * 2018-02-05 2018-09-21 四川动和工程咨询有限公司 A kind of construction method of regular reinforcement and finish rolling deformed bar hybrid reinforcement assembly pier
WO2019149270A1 (en) * 2018-02-05 2019-08-08 横琴共轭科技有限公司 Assembled pier for mixed reinforcement of normal steel rebar and finished threaded steel bar

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160914

Termination date: 20170215

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