CN202954289U - Pier bottom arrangement structure for pushing continuous rigid framework bridge for springing after midspan closure - Google Patents
Pier bottom arrangement structure for pushing continuous rigid framework bridge for springing after midspan closure Download PDFInfo
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- CN202954289U CN202954289U CN201220528555XU CN201220528555U CN202954289U CN 202954289 U CN202954289 U CN 202954289U CN 201220528555X U CN201220528555X U CN 201220528555XU CN 201220528555 U CN201220528555 U CN 201220528555U CN 202954289 U CN202954289 U CN 202954289U
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- bridge pier
- continuous rigid
- pushing tow
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Abstract
The utility model relates to the field of bridge construction, in particular to a pier bottom arrangement structure for pushing a continuous rigid framework bridge for springing after midspan closure. According to the specific scheme, a groove structure is formed in the top of a bearing table; a movable hinged support is hinged between the pier bottom of a bridge pier and an inner surface of the groove bottom of the groove structure; temporary pushing equipment is arranged between the inner side wall of a side span of the groove structure and the outer side of the pier bottom of the bridge pier in the longitudinal bridge direction and is arranged symmetrically by taking a midspan beam body as a center; and limit devices are arranged in gaps between other three sides of the pier bottom of the bridge pier and the inner side wall of the groove structure respectively. The pier bottom arrangement structure has the advantages that the temporary movable hinged support is adopted when the pier bottom of the bridge pier is pushed, so that the pier bottom arrangement structure is simple in arrangement and easy to operate during construction; and the pier bottom of the bridge pier is fixedly connected with the bearing table to eliminate the unfavorable secondary internal force generated by a continuous rigid framework bridge system in the closure stage effectively. The bottom arrangement structure is suitable for the continuous rigid framework bridge with V-shaped piers or T-shaped piers.
Description
Technical field
The utility model relates to the Bridge Construction field, is specifically related to a kind ofly establish structure for continuous rigid frame bridge pier base fabric of pushing tow arch camber after midspan closing.
Background technology
Conventional rigid frame bridge construction technology is: will admittedly prop up on cushion cap at the bottom of T-shaped pier or V-type pier.Like this, in bridge span during closure section construction, be subjected to the adverse effect of the solid Zhi Duan at the bottom of the bridge pier pier very large across the construction effect of prestressed strand in stretch-draw, often do not reach desirable pre-stress construction effect, this has limited the span of continuous rigid frame bridge greatly.
Therefore those skilled in the art are badly in need of a kind ofly not only can effectively having eliminated unfavorable the internal force that produces in the closure process but also the job practices that can improve the continuous rigid frame bridge span.
Summary of the invention
The purpose of this utility model is according to above-mentioned the deficiencies in the prior art part, provide a kind of and establish structure for continuous rigid frame bridge pier base fabric of pushing tow arch camber after midspan closing, it is temporarily hinged at the bottom of by the bottom land inner surface in the groove shape structure of cushion cap, movable hinged shoe and bridge pier pier being set that this pier base fabric is established structure, simultaneously between the inside wall of the outside and groove shape structure at the bottom of the pier of bridge pier end bay one side, incremental launching device is set, take cushion cap as after make in continuous rigid frame bridge across the arch camber of beam body at the bottom of leaning against bridge pier both sides relative pushing tow bridge pier pier.
The utility model purpose realizes being completed by following technical scheme:
A kind ofly establish structure for continuous rigid frame bridge pier base fabric of pushing tow arch camber after midspan closing, in mainly comprising across the beam body, support described in across the bridge pier at beam body two ends and the cushion cap that is used for supporting described bridge pier, it is characterized in that: the top of described cushion cap has a groove shape structure, be hingedly connected with a movable hinged shoe at the bottom of the pier of described bridge pier and between the bottom land inner surface of described groove shape structure, one end of wherein said movable hinged shoe is connected with described bottom land, is connected at the bottom of the pier of its other end and described bridge pier.
Described bridge pier is V-type pier or T-shaped pier.
Respectively at the bottom of the pier of the inside wall of described groove shape structure and described bridge pier between the outside along vertical bridge to interim incremental launching device is set, at the bottom of the pier of wherein said two bridge piers, interim incremental launching device is arranged symmetrically with centered by the span centre across the beam body in described.
Described interim incremental launching device is comprised of a jack at least, is provided with displacement transducer on described jack.
Be symmetrically arranged with stopping means at direction across bridge between the pier bottom side of described bridge pier and described groove shape structure inside wall, indulging bridge to stopping means is set simultaneously between inboard and described groove shape structure inside wall at the bottom of the pier of described bridge pier.
Described stopping means is comprised of a jack at least, is provided with displacement transducer on described jack.
The utility model has the advantages that, adopting interim articulated structure at the bottom of the pier of bridge pier during pushing tow, structural configuration is simple, the construction easy operating, use this structure after midspan closing take cushion cap as rear by can effectively having eliminated with cushion cap is fixed unfavorable the internal force that the continuous rigid frame bridge system produced in the closure stage at the bottom of again the bridge pier pier after to the rigid frame bridge pushing tow, this pier bottom structure is applicable to V-type pier or T-shaped pier continuous rigid frame bridge.
Description of drawings
Fig. 1 is bridge construction schematic diagram of the present utility model;
Fig. 2 is the bridge pier pier bottom hinge connecting structure schematic diagram of the utility model when pushing tow;
Fig. 3 is apparatus arrangement top view in the utility model further groove structure and groove;
Fig. 4 be of the present utility model in across beam body section schematic diagram;
Fig. 5 be at the bottom of the utility model bridge pier pier in groove the fixed schematic diagram of concreting.
The specific embodiment
Feature of the present utility model and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
As Fig. 1-5, in figure, mark 1-15 is respectively: end bay beam body 1, in across at the bottom of beam body 2, interim incremental launching device 3, groove shape structure 4, movable hinged shoe 5, cushion cap 6, stopping means 7, bridge pier 8, top board 9, prestressed strand 10, base plate 11, prestressed strand 12, bridge pier pier 13, monitoring point 14, monitoring point 15.
Embodiment: the present embodiment will be specifically described as an example of V-type pier rigid frame bridge example, by to V-type pier incremental launching construction, in be 27.7cm across the arch theoretical value of beam body 2, end bay beam body 1 two ends downwarp theoretical value is-32.7cm can reach 10cm to span centre length travel maximum at the bottom of V-type pier pier.For guaranteeing that the cushion cap end bay side soil body has enough rigidity, at first reinforces near the end bay beam body 1 one side soil bodys cushion cap 6 and pile foundation.The special character of this job practices is in groove shape structure 4, movable hinged shoe 5 to be set, and the lower part of movable hinged shoe 5 and groove shape structure 4 is fixing, it on part with 13 fix at the bottom of the bridge pier pier.End bay is fixed with cushion cap at the bottom of bridge pier to design elevation after-pouring concrete bridge pier 8 pushing tows are moved to, in the simultaneous tension of pushing tow across the prestressed strand of beam body 2.
The concrete steps of the present embodiment are as follows:
(1) in across beam body 2 closure, until in when reaching 100% across beam body 2 curing strengths, in dismounting across the Hanging Basket on beam body 2 and stiff skeleton.
(2) groove shape structure 4 interior pushing tow and spacing equipment are installed.Arrange one group of interim incremental launching device 3 in the interior end bay beam body of groove shape structure 41 side (at the bottom of being the bridge pier pier, 13 vertical bridge laterally), other three side is arranged three groups of temporary spacing devices 7; Interim incremental launching device 3 and temporary spacing device 7 are all symmetrical centered by span centre, and described interim incremental launching device 3 and temporary spacing device 7 are specially a plurality of jack and form; In three groups of temporary spacing devices 7, be used for providing pushing reaction to prevent at the bottom of bridge pier 8 piers at vertical excessive pushing tow over against a side of interim incremental launching device 3, laterally jack is arranged at the bottom of the bridge pier pier 13 both lateral sides and is used for spacingly preventing at the bottom of the bridge pier pier that 13 produce lateral shifts; Be provided with control point and PLC hydraulic synchronization pushing tow system on incremental launching device 3 and spacing equipment 7, each control point is provided with stay-supported type displacement sensor, be used for to measure at the bottom of the bridge pier pier 13 shift value, by the Synchronization Control of described PLC hydraulic synchronization pushing tow system's realizable force and displacement.
(3) cut the temporary locking post, remove the locking system of movable hinged shoe 5.
(4) in across beam body 2 and end bay beam body 1 end, vertical displacement monitoring point 14 and monitoring point 15 are set respectively.
(5) after interim incremental launching device 3, temporary spacing device 7 and the Installation and Debugging of PLC hydraulic synchronization pushing tow system equipment are completed, try incremental launching construction.Purpose is the operation stability of check pushing tow system and the accuracy of monitoring system, and the longitudinal strain of monitoring cushion cap 6 detects the relation that jacking force and superstructure are out of shape.
(6) after the examination pushing tow was completed, centering was carried out stretch-draw across the prestressed strand 10 in the top board 9 of beam body 2.Short bundle after first length is restrainted, symmetrical stretch-draw.
(7) after stretch-draw is completed, open simultaneously for the first time the interim incremental launching device 3 in grooves on two sides shape structure 4, interim incremental launching device 3 in across at the bottom of the symmetrical pushing tow bridge pier of direction pier 13, produce arch across beam body 2 in making, end bay beam body 1 produces downwarp.At the bottom of this bridge pier pier, 13 displacement is 2cm, and pushing tow evenly applies take 1mm as one-level, the pushing tow rear employing mechanical position limitation locking that puts in place.
(8) after pushing tow is completed for the first time, the prestressed strand 12 in stretch-draw base plate 11, short bundle after first length is restrainted, symmetrical stretch-draw; The stretch-draw while, 13 assist pushing tow to increase the stretch-draw effect at the bottom of the bridge pier pier.
(9) after the whole stretch-draw of the interior steel bundle of base plate 11 are completed, carry out at the bottom of bridge pier pier for the second time 13 pushing tow, until till end bay beam body 1 reaches design elevation.
(10) in twice pushing tow process, equal Real-Time Monitoring change in displacement data are guaranteed the precision of pushing tow; Three groups of temporary spacing device 7 Real-Time Monitoring displacement situations provide pushing reaction simultaneously, prevent interim incremental launching device 3 at vertical excessive pushing tow and are laterally producing skew.
(11) in the middle of across beam body 2 arch and 1 downwarp of end bay beam body to absolute altitude, with movable hinged shoe 5 by the locking system locking so that bridge pier 8 stops displacement; Gap location in bridge pier 8 and groove shape structure 4 arranges i iron and welded reinforcement; Can prevent that at i iron bridge pier from not removing described incremental launching device 3 and stopping means 7 under situation of movement; Concreting in groove shape structure 4 is so that be consolidated at the bottom of the pier of bridge pier 8 in groove shape structure 4.
Complete end bay concreting when (12) temperature in a day is minimum, form continuous rigid frame bridge after the corresponding prestressed strand of stretch-draw.
So far, the construction of V-type pier continuously strong bridge structure finishes, this job practices and pier base fabric thereof are established structure and have effectively been eliminated the continuous steel frame system at unfavorable the internal force that the closure stage produces, and can improve the span of rigid frame bridge, are applicable to V-type pier or T-shaped pier continuous rigid frame bridge.
Claims (6)
1. establish structure for continuous rigid frame bridge pier base fabric of pushing tow arch camber after midspan closing for one kind, in mainly comprising across the beam body, support described in across the bridge pier at beam body two ends and the cushion cap that is used for supporting described bridge pier, it is characterized in that: the top of described cushion cap has a groove shape structure, be hingedly connected with a movable hinged shoe at the bottom of the pier of described bridge pier and between the bottom land inner surface of described groove shape structure, one end of wherein said movable hinged shoe is connected with described bottom land, is connected at the bottom of the pier of its other end and described bridge pier.
2. according to claim 1ly a kind ofly establish structure for continuous rigid frame bridge pier base fabric of pushing tow arch camber after midspan closing, it is characterized in that: described bridge pier is V-type pier or T-shaped pier.
3. according to claim 1ly a kind ofly establish structure for continuous rigid frame bridge pier base fabric of pushing tow arch camber after midspan closing, it is characterized in that: respectively at the bottom of the pier of the inside wall of described groove shape structure and described bridge pier between the outside along vertical bridge to interim incremental launching device is set, at the bottom of the pier of wherein said two bridge piers, interim incremental launching device is arranged symmetrically with centered by the span centre across the beam body in described.
4. according to claim 3ly a kind ofly establish structure for continuous rigid frame bridge pier base fabric of pushing tow arch camber after midspan closing, it is characterized in that: described interim incremental launching device is comprised of a jack at least, is provided with displacement transducer on described jack.
5. according to claim 1ly a kind ofly establish structure for continuous rigid frame bridge pier base fabric of pushing tow arch camber after midspan closing, it is characterized in that: be symmetrically arranged with stopping means at direction across bridge between the pier bottom side of described bridge pier and described groove shape structure inside wall, indulging bridge to stopping means is set simultaneously between inboard and described groove shape structure inside wall at the bottom of the pier of described bridge pier.
6. according to claim 5ly a kind ofly establish structure for continuous rigid frame bridge pier base fabric of pushing tow arch camber after midspan closing, it is characterized in that: described stopping means is comprised of a jack at least, is provided with displacement transducer on described jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220528555XU CN202954289U (en) | 2012-10-16 | 2012-10-16 | Pier bottom arrangement structure for pushing continuous rigid framework bridge for springing after midspan closure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220528555XU CN202954289U (en) | 2012-10-16 | 2012-10-16 | Pier bottom arrangement structure for pushing continuous rigid framework bridge for springing after midspan closure |
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| CN202954289U true CN202954289U (en) | 2013-05-29 |
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| CN201220528555XU Expired - Lifetime CN202954289U (en) | 2012-10-16 | 2012-10-16 | Pier bottom arrangement structure for pushing continuous rigid framework bridge for springing after midspan closure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105970831A (en) * | 2016-05-24 | 2016-09-28 | 西安公路研究院 | Bottom plate jacking system for jacking closure section of continuous rigid frame bridge and construction method of bottom plate jacking system |
| CN108978499A (en) * | 2018-06-12 | 2018-12-11 | 中铁大桥勘测设计院集团有限公司 | A kind of oblique pull suspension cable co-operative system bridge erection method |
| CN110080109A (en) * | 2019-04-15 | 2019-08-02 | 中铁广州工程局集团有限公司 | A kind of trough girder push construction method |
| CN112144328A (en) * | 2019-06-28 | 2020-12-29 | 比亚迪股份有限公司 | Track support assembly, assembly method thereof, track and track traffic system |
-
2012
- 2012-10-16 CN CN201220528555XU patent/CN202954289U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105970831A (en) * | 2016-05-24 | 2016-09-28 | 西安公路研究院 | Bottom plate jacking system for jacking closure section of continuous rigid frame bridge and construction method of bottom plate jacking system |
| CN108978499A (en) * | 2018-06-12 | 2018-12-11 | 中铁大桥勘测设计院集团有限公司 | A kind of oblique pull suspension cable co-operative system bridge erection method |
| CN110080109A (en) * | 2019-04-15 | 2019-08-02 | 中铁广州工程局集团有限公司 | A kind of trough girder push construction method |
| CN112144328A (en) * | 2019-06-28 | 2020-12-29 | 比亚迪股份有限公司 | Track support assembly, assembly method thereof, track and track traffic system |
| CN112144328B (en) * | 2019-06-28 | 2023-09-05 | 比亚迪股份有限公司 | Rail support assembly, method of assembling the same, and rail transit system |
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Granted publication date: 20130529 |
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| CX01 | Expiry of patent term |