CN103352429A - Bracket counter pull loading pre-pressing device and tensioning pre-pressing method thereof - Google Patents

Bracket counter pull loading pre-pressing device and tensioning pre-pressing method thereof Download PDF

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Publication number
CN103352429A
CN103352429A CN201310293002XA CN201310293002A CN103352429A CN 103352429 A CN103352429 A CN 103352429A CN 201310293002X A CN201310293002X A CN 201310293002XA CN 201310293002 A CN201310293002 A CN 201310293002A CN 103352429 A CN103352429 A CN 103352429A
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China
Prior art keywords
carriage
stretch
anchor system
steel
draw
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CN201310293002XA
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Chinese (zh)
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CN103352429B (en
Inventor
赵�智
谢录杲
黄再洪
秦瑞谦
王智勇
马文荣
闫生平
夏凤泉
刘薇
罗坤强
贺明明
杨林益
张军
宋桃红
顾福剑
陈正彪
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China Railway No 8 Engineering Group Co Ltd
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China Railway No 8 Engineering Group Co Ltd
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Abstract

The invention discloses a bracket counter pull loading pre-pressing device and a tensioning pre-pressing method of the bracket counter pull loading pre-pressing device, and belongs to the technical field of bridges. The bracket counter pull loading pre-pressing device is composed of an upper anchor system, a lower anchor system, steel strand bundles and tensioning jacks, wherein the upper anchor system is placed on a bracket, the lower anchor system is located below the upper anchor system, and the steel strand bundles connect the upper anchor system and the lower anchor system. The upper anchor system is composed of a plurality of distribution cross beams, at least two reinforcing longitudinal beams, a reinforcing cross beam and the tensioning jacks, wherein the distribution cross beams are placed on the top of the bracket, the reinforcing longitudinal beams are placed on the tops of the distribution cross beams, the reinforcing cross beam is placed on the tops of the reinforcing longitudinal beams, and the tensioning jacks are installed on the intersections of the reinforcing cross beam and the reinforcing longitudinal beams and on the top face of the reinforcing cross beam. The lower anchor system is composed of a plurality of sets of connection columns, double-splicing I-steel beams and anchor base plates, wherein the double-splicing I-steel beams connect the steel strand bundles and each set of connection columns, and the other ends of the steel strand bundles are fixed on the tensioning jacks. The bracket counter pull loading pre-pressing device and the tensioning pre-pressing method of the bracket counter pull loading pre-pressing device are rapid, effective and applicable.

Description

Counter the drawing of carriage loads prepressing device and stretch-draw preloading method thereof
Technical field
The invention belongs to the bridge technology field.
Background technology
The general employing of prestressed concrete continuous beam construction set up the full hall scaffold formwork erection or adopted the Hanging Basket cantilever grouting.Can only adopt the construction of Hanging Basket cantilever pouring in the time of scaffold can't being set up when bridge pier under the higher or bridge.The cradle construction prerequisite is must be at the complete 0# sections of bridge pier construction, and the 0# segmental construction generally is by pushing up pre-buried built-in fitting at pier, and the load that installation bracket is born 0# sections cantilever segment provides working space simultaneously.
Carriage and Hanging Basket are set up and are completely formally enabled front need carriage and Hanging Basket are carried out precompressed afterwards, to detect safety, elastic deformation and the nonelastic deformation of carriage and Hanging Basket.Conventional carriage precompressed is piling prepressing, the preloading material commonly uses that concrete precast block, steel, water tank add water, water bag adds water, gunnysack sand loading etc., in the piling prepressing process, need to transport a large amount of pre-briquettings (or steel), lifting, unloaded operation, workload is larger, expense is high, and the time is long.
Summary of the invention
The object of the invention is to: propose counter the drawing of a kind of quick, effective, applicable carriage and load prepressing device and stretch-draw preloading method thereof.
The object of the invention realizes by following technical proposals:
The anti-loading prepressing device that draws of a kind of carriage, by the upper anchor system that is positioned on the carriage, be positioned at the lower anchor system of described upper anchor system below, connect described on, the steel wire bundle of lower anchor system and stretch-draw jack form, described lower anchor system is anchored end, upper anchor system is stretching end, described upper anchor system distributes crossbeam by some that place at described carriage top, the at least two reinforcement longerons of placing at described distribution crossbeam top, a web beam of placing at described reinforcement longeron top, and the described stretch-draw jack composition that is installed in described web beam and reinforcement longeron intersection web beam end face; Described lower anchor system by be embedded in the cushion cap, per 2 be one group some groups of joint pins, the Two bors d's oeuveres steel I-beam that connects described steel wire bundle and each group joint pin, and the anchor plate that this steel wire bundle one end is fixed on the described Two bors d's oeuveres steel I-beam forms, and the described steel wire bundle other end is fixed on the described stretch-draw jack.
As optimal way, described joint pin is 8 Ф 32mm fining twisted steels, described Two bors d's oeuveres steel I-beam is I 40c i iron, described distribution crossbeam is 10 I 32b i iron, 4 spacings of wherein said stretch-draw jack stretch-draw place are that 20cm equidistantly places, all the other spacings are that 60cm equidistantly places, and described reinforcement longeron is 2 I 40c i iron, and described web beam is I 32b i iron.
The anti-stretch-draw preloading method that loads prepressing device that draws of a kind of aforementioned bracket is comprised of following steps:
The first step, build the pier cap concrete before, at the pre-buried good joint pin of the big or small mileage end in cushion cap of the projected position on the cushion cap, then build the pier cap concrete according to jack;
When second step, bridge pier are built and are pushed up to pier, at the pre-buried reinforcement steel plate of bridge pier size mileage end, reserve and cross the fining twisted steel preformed hole;
The 3rd step, in the preformed hole of bridge pier pier top, put on fining twisted steel, carriage is mounted to the preformed hole position by Pin, after installing, carriage by Pin carriage, fining twisted steel symmetry are carried out stretch-draw anchor;
In the 4th step, after the carriage anchoring, level welding diagonal brace is welded and fixed carriage between girder about per two Pin carriages, makes carriage form integral body;
The 5th step, lay the distribution crossbeam at the carriage top, then distributing the crossbeam top to lay at least two reinforcement longerons, then lay a web beam at reinforcement longeron top;
The 6th step was installed in the Two bors d's oeuveres steel I-beam that cushion cap is pre-buried respectively to be organized on the joint pin, and joint pin need carry out stretch-draw before the anchoring;
In the 7th step, at ground well cutting steel wire bundle, to the stretch-draw jack place, the steel wire bundle other end is anchored in Two bors d's oeuveres steel I-beam bottom by anchor plate with steel wire bundle one end handling;
The 8th step was seated to web beam with stretch-draw jack and strengthened longeron intersection web beam end face, and the steel wire bundle upper end is passed jack and carried out grading tension, and every bridge pier size mileage side is carried out simultaneously during stretch-draw.
Beneficial effect of the present invention: adopt the present invention that carriage is carried out the stretch-draw precompressed, can greatly save the carriage squeeze time, reduce security risk, reduce labour intensity, save the precompressed cost, tensioning equipment can reuse.
Description of drawings
Fig. 1 is the front elevation view of the embodiment of the invention;
Fig. 2 is the upper anchor system plan view of the embodiment of the invention;
Fig. 3 is the upper anchor system side elevational view of the embodiment of the invention;
Fig. 4 is the upper anchor system front elevation view of the embodiment of the invention;
Fig. 5 is the fining twisted steel plane of arrangement figure of the system of casting anchor of the embodiment of the invention;
Wherein 1 is that carriage, 2 is that steel wire bundle, 3 is that stretch-draw jack, 4 is that distribution crossbeam, 5 is that reinforcement longeron, 6 is that web beam, 7 is that cushion cap, 8 is that Two bors d's oeuveres steel I-beam, 9 is that anchor plate, 10 is that fining twisted steel, 11 is that bridge pier, 101 is that upper girder, 102 is that lower girder, 103 is horizontal diagonal brace.
The specific embodiment
Following non-limiting examples is used for explanation the present invention.
Shown in Fig. 1 to 5, the anti-loading prepressing device that draws of a kind of carriage, by the upper anchor system that is positioned on the carriage 1, be positioned at the lower anchor system of anchor system below, in the connection, the steel wire bundle 2 of lower anchor system and stretch-draw jack 3 form, lower anchor system is anchored end, upper anchor system is stretching end, upper anchor system distributes crossbeam 4 by some that place at carriage 1 top, at at least two reinforcement longerons 5 that distribute crossbeam 4 tops to place, at a web beam 6 of strengthening the placement of longeron 5 tops, and stretch-draw jack 3 compositions that are installed in web beam 6 and reinforcement longeron 5 intersection web beams 6 end faces; Lower anchor system by be embedded in the cushion cap 7, per 2 be one group some groups of joint pins, the Two bors d's oeuveres steel I-beam 8 that connects steel wire bundle 2 and each group joint pin, and the anchor plate 9 that these steel wire bundle 2 one ends are fixed on the Two bors d's oeuveres steel I-beam 8 forms, and steel wire bundle 2 other ends are fixed on the stretch-draw jack 3.As optimal way, as shown in this embodiment, joint pin is 8 Ф 32mm fining twisted steels 10, Two bors d's oeuveres steel I-beam 8 is I 40c i iron, distributing crossbeam 4 is 10 I 32b i iron, and wherein 4 spacings of stretch-draw jack 3 stretch-draw place are that 20cm equidistantly places, and all the other spacings are that 60cm equidistantly places, strengthening longeron 5 is 2 I 40c i iron, and web beam 6 is I 32b i iron.
The anti-stretch-draw preloading method that loads prepressing device that draws of a kind of aforementioned bracket is comprised of following steps:
The first step, build bridge pier 11 cushion caps 7 concrete before, at pre-buried 8 of cushion cap 7 interior big or small mileage ends (totally 4 groups, per 2 is 1 group) fining twisted steel 10, then build bridge pier 11 cushion caps 7 concrete according to the projected position of jack on cushion cap.
When second step, bridge pier 11 are built and are pushed up to pier, at the pre-buried reinforcement steel plate of bridge pier 11 big or small mileage ends, reserve and cross the fining twisted steel preformed hole.
The 3rd step, in bridge pier 11 pier top preformed holes, put on fining twisted steel, carriage 1 is mounted to the preformed hole position by Pin, after installing, carriage 1 by Pin carriage 1 fining twisted steel symmetry is carried out stretch-draw anchor.
The 4th step after carriage 1 anchoring, was welded and fixed carriage 1 at per two Pin carriages girder 21 1 about, 22 levels welding diagonal braces 23, make carriage 1 form integral body (carriage 1 mainly by upper and lower girder 101,102 and horizontal diagonal brace 103 form).
The 5th step, equidistantly (spacing is 60cm) lays 6 distribution crossbeam 4(I 32b i iron at carriage 1 top), 4 at jack tension place distributes crossbeam 4 to encrypt (spacing is 20cm), then distributing jack tension place, crossbeam 4 top to lay two reinforcement longeron 5(I 40c i iron), then strengthen jack tension places, longeron 5 top two and lay a web beam 6(I 32b i iron).
The 6th step is with Two bors d's oeuveres steel I-beam 8(I 40c i iron) be installed on the pre-buried fining twisted steel 10 of cushion cap, fining twisted steel 10 need carry out stretch-draw before the anchoring.
In the 7th step, at ground well cutting steel wire bundle, to the stretch-draw jack place, the steel wire bundle other end is anchored in Two bors d's oeuveres steel I-beam bottom by anchor plate with steel wire bundle one end handling.
The 8th step, stretch-draw jack 3 is seated to web beam 6(I 32b i iron) top stretch-draw place (on the web beam 6 and reinforcement longeron 5 intersections), steel wire bundle 2 upper ends are passed stretch-draw jack 3 and are carried out grading tension, and every bridge pier size mileage side is carried out simultaneously during stretch-draw.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (3)

1. anti-loading prepressing device that draws of carriage, it is characterized in that: by the upper anchor system that is positioned on the carriage, be positioned at the lower anchor system of described upper anchor system below, connect described on, the steel wire bundle of lower anchor system and stretch-draw jack form, described lower anchor system is anchored end, upper anchor system is stretching end, described upper anchor system distributes crossbeam by some that place at described carriage top, the at least two reinforcement longerons of placing at described distribution crossbeam top, a web beam of placing at described reinforcement longeron top, and the described stretch-draw jack composition that is installed in described web beam and reinforcement longeron intersection web beam end face; Described lower anchor system by be embedded in the cushion cap, per 2 be one group some groups of joint pins, the Two bors d's oeuveres steel I-beam that connects described steel wire bundle and each group joint pin, and the anchor plate that this steel wire bundle one end is fixed on the described Two bors d's oeuveres steel I-beam forms, and the described steel wire bundle other end is fixed on the described stretch-draw jack.
2. the anti-loading prepressing device that draws of carriage as claimed in claim 1, it is characterized in that: described joint pin is 8 Ф 32mm fining twisted steels, described Two bors d's oeuveres steel I-beam is I 40c i iron, described distribution crossbeam is 10 I 32b i iron, 4 spacings of wherein said stretch-draw jack stretch-draw place are that 20cm equidistantly places, all the other spacings are that 60cm equidistantly places, and described reinforcement longeron is 2 I 40c i iron, and described web beam is I 32b i iron.
3. the anti-stretch-draw preloading method that loads prepressing device that draws of a claim 1 or 2 described carriages is characterized in that being comprised of following steps:
The first step, build the pier cap concrete before, at the pre-buried good joint pin of the big or small mileage end in cushion cap of the projected position on the cushion cap, then build the pier cap concrete according to jack;
When second step, bridge pier are built and are pushed up to pier, at the pre-buried reinforcement steel plate of bridge pier size mileage end, reserve and cross the fining twisted steel preformed hole;
The 3rd step, in the preformed hole of bridge pier pier top, put on fining twisted steel, carriage is mounted to the preformed hole position by Pin, after installing, carriage by Pin carriage, fining twisted steel symmetry are carried out stretch-draw anchor;
In the 4th step, after the carriage anchoring, level welding diagonal brace is welded and fixed carriage between girder about per two Pin carriages, makes carriage form integral body;
The 5th step, lay the distribution crossbeam at the carriage top, then distributing the crossbeam top to lay at least two reinforcement longerons, then lay a web beam at reinforcement longeron top;
The 6th step was installed in the Two bors d's oeuveres steel I-beam that cushion cap is pre-buried respectively to be organized on the joint pin, and joint pin need carry out stretch-draw before the anchoring;
In the 7th step, at ground well cutting steel wire bundle, to the stretch-draw jack place, the steel wire bundle other end is anchored in Two bors d's oeuveres steel I-beam bottom by anchor plate with steel wire bundle one end handling;
The 8th step was seated to web beam with stretch-draw jack and strengthened longeron intersection web beam end face, and the steel wire bundle upper end is passed jack and carried out grading tension, and every bridge pier size mileage side is carried out simultaneously during stretch-draw.
CN201310293002.XA 2013-07-12 2013-07-12 Bracket reverse drawing loads the stretch-draw preloading method of prepressing device Active CN103352429B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104764618A (en) * 2015-03-19 2015-07-08 重庆交通建设(集团)有限责任公司 Bridge cantilevered casting hanging basket controllable equivalent pre-load testing method
CN107227687A (en) * 2017-06-09 2017-10-03 中铁建大桥工程局集团第五工程有限公司 Balanced system of force high-altitude crossbar bracket construction method
CN108489748A (en) * 2018-03-23 2018-09-04 西安建筑科技大学 A kind of experimental rig and test method for continuous bridge long period Study of Cyclic Loading
CN109208488A (en) * 2018-10-24 2019-01-15 中国水利水电第八工程局有限公司 A kind of the high pier prepressing device and its construction method of high idle pattern ballast
CN110578288A (en) * 2019-08-28 2019-12-17 中铁大桥局集团有限公司 steel-concrete combined beam system conversion device and steel beam weight-pressing method
CN111622091A (en) * 2020-05-27 2020-09-04 中铁北京工程局集团第一工程有限公司 Stress test method for prefabricated bridge pier
CN112095435A (en) * 2020-09-27 2020-12-18 广州市第二市政工程有限公司 Construction method for prepressing large-span steel arch frame
CN113235443A (en) * 2021-05-20 2021-08-10 广西路桥工程集团有限公司 Pre-pressing construction method of assembly type 0# block construction bracket

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CN101672018A (en) * 2009-08-27 2010-03-17 孙广喜 Trackless hanging bracket with traveling truss
CN102286925A (en) * 2011-07-08 2011-12-21 四川路航建设工程有限责任公司 Bridge single column pier assembled box bracket system and mounting method thereof
CN203373666U (en) * 2013-07-12 2014-01-01 中铁八局集团有限公司 Bracket pull-counter loading prepressing device

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JP2000199208A (en) * 1998-10-26 2000-07-18 Sumitomo Rubber Ind Ltd Reinforcing method for plate concrete structure
CN101672018A (en) * 2009-08-27 2010-03-17 孙广喜 Trackless hanging bracket with traveling truss
CN102286925A (en) * 2011-07-08 2011-12-21 四川路航建设工程有限责任公司 Bridge single column pier assembled box bracket system and mounting method thereof
CN203373666U (en) * 2013-07-12 2014-01-01 中铁八局集团有限公司 Bracket pull-counter loading prepressing device

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104764618A (en) * 2015-03-19 2015-07-08 重庆交通建设(集团)有限责任公司 Bridge cantilevered casting hanging basket controllable equivalent pre-load testing method
CN104764618B (en) * 2015-03-19 2017-11-21 重庆交通建设(集团)有限责任公司 A kind of bridge cantilever pours the controllable equivalent advanced press load test method of Hanging Basket
CN107227687A (en) * 2017-06-09 2017-10-03 中铁建大桥工程局集团第五工程有限公司 Balanced system of force high-altitude crossbar bracket construction method
CN108489748A (en) * 2018-03-23 2018-09-04 西安建筑科技大学 A kind of experimental rig and test method for continuous bridge long period Study of Cyclic Loading
CN108489748B (en) * 2018-03-23 2019-11-12 西安建筑科技大学 A kind of experimental rig and test method for continuous bridge long period Study of Cyclic Loading
CN109208488A (en) * 2018-10-24 2019-01-15 中国水利水电第八工程局有限公司 A kind of the high pier prepressing device and its construction method of high idle pattern ballast
CN109208488B (en) * 2018-10-24 2021-01-15 中国水利水电第八工程局有限公司 High pier pre-pressing device with high combined weight at high altitude and construction method thereof
CN110578288A (en) * 2019-08-28 2019-12-17 中铁大桥局集团有限公司 steel-concrete combined beam system conversion device and steel beam weight-pressing method
CN111622091A (en) * 2020-05-27 2020-09-04 中铁北京工程局集团第一工程有限公司 Stress test method for prefabricated bridge pier
CN112095435A (en) * 2020-09-27 2020-12-18 广州市第二市政工程有限公司 Construction method for prepressing large-span steel arch frame
CN113235443A (en) * 2021-05-20 2021-08-10 广西路桥工程集团有限公司 Pre-pressing construction method of assembly type 0# block construction bracket

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