CN1139721A - Construction method of jacking and pushing bridge box and beam rear part - Google Patents
Construction method of jacking and pushing bridge box and beam rear part Download PDFInfo
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- CN1139721A CN1139721A CN 95119642 CN95119642A CN1139721A CN 1139721 A CN1139721 A CN 1139721A CN 95119642 CN95119642 CN 95119642 CN 95119642 A CN95119642 A CN 95119642A CN 1139721 A CN1139721 A CN 1139721A
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- slideway
- jack
- bridge
- case beam
- top iron
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Abstract
The present invention relates to a construction method of continuous beam of bridge. The stop iron is leaned against on the bearing bed fixed on the bridgehead foundation, and the rear of the jack is leaned against on the stop iron, and the front portion of the jack is propped against on the tail portion of box beam supported on the slideway, and a slide block is placed between the box beam and slideway, and the slideway is fixed on the bridge abutment, and the box beam can be pushed forward by means of the jack. Said invention is easy to implement, and safe, and can save a lot of equipments, and can be extensively used for installation of continuous beam of the bridge.
Description
The present invention relates to the construction method in a kind of bridge erection, is a kind of construction method of pushing tow continuous beam box and beam rear part specifically.
The bridge erection method that adopts mainly contains two kinds at present, and the one, La Erfa, it is to add at the case beam sides to draw the anchor device, claim ear again, pull bar is fixed on and draws on the anchor device, and pull bar passes the centre bore of offering on the jack, jack is fixed on the bridge pier, and jack blocks pull bar, drives the case beam and advances.Adorn 2 jack on each bridge pier, usually, every bridge has a plurality of bridge piers, so big with the amount of jack, complicated operation also is difficult to make their synchronous operation.The 2nd, draw " belly " method, be about to draw the anchor device to be contained in the bottom of case beam, its daraf(reciprocal of farad) is identical with said method.It exists the jack consumption big equally, and complicated operation is difficult to synchronous disadvantage again.
The job practices that the purpose of this invention is to provide a kind of easier installation continuous beam case beam.
The present invention is achieved in that at first ready work, promptly builds up bearing platform at end of the bridge, and the case of bridge is beam prefabricated on prefabricated platform, installs slideway on each bridge pier, prepares the top iron of sufficient amount, different model, jack is connected with oil pump etc.Its job practices is that top iron leans against on the bearing platform that is fixed on the bridge foundation, the rear portion of jack leans against on the iron of top, and the afterbody of the case beam of frame on slideway is withstood in the front portion of jack, is lined with slide block between case beam and slideway, slideway is fixed on the bridge pier, the case beam by very heavy pushing tow and advances.
Construction like this, the rear portion of jack leans against on the bearing platform that is fixed on the bridge foundation, top iron is withstood in the front portion of jack, top iron withstands the afterbody of the case beam of frame on slideway again, between case beam and slideway, be lined with slide block, slideway is fixed on the bridge pier, heads on the case beam by jack by top iron and advances.
Slideway is placed on the slideway outside plate that is set in slideway inner panel outside by 3--10 slide block and constitutes.The slideway inner panel by thickness between the 20--30 millimeter, the steel plate of width between the 500--800 millimeter make.The outer meal of slideway is made by common alloy-steel plate or corrosion resistant plate, and slideway outside plate and slideway inner panel weld solid.Slide block is made of the polyvinyl chloride tetrafluoro plate that steel plate that studs with 1--5 layer, 2--3 millimeters thick in the rubber layer and rubber layer soffit are stained with the 2--3 millimeters thick securely.
Effect of the present invention is significant:
One, the equipment consumption is few.The present invention gets final product with 2 jack, can save a large amount of jack, built-in fitting, pull bar etc. than La Erfa.
Two, be convenient to operation.The operation of La Erfa is carried out on bridge pier.Operation of the present invention is to carry out on the prefabricated platform of riverbank end of the bridge.Like this, be convenient to operation, also can avoid the danger of work high above the ground, be easy to realize safety in production.
Three, because the present invention with very heavy at least, easily synchronously, can prevent the beam solid offsetting, pushing tow translation, production safety in the operating process.
Fig. 1 is a construction schematic diagram of the present invention;
Fig. 2 is the slideway structure schematic diagram.
A kind of embodiment of the present invention as shown in Figure 1, top iron 2 leans against on the bearing platform 1 that is fixed on the bridge foundation, the rear portion of jack 3 leans against on the top iron 2, the afterbody of the case beam 5 of frame on slideway 4 is withstood in the front portion of jack 3, between case beam 5 and slideway 4, be lined with slide block 9, slideway 4 is fixed on the bridge pier 6, is pushing away case beam 5 by jack 3 and is advancing.
Bearing platform 1 is called pushing tow back again, determines its size according to pushing tow weight, usually, the pushing tow counter-force be pushing tow weight 5% to 10% between, it is relevant with the friction factor between slideway outside plate 8 and the slide block 9.Slideway outside plate 8 is bright and clean more, smooth, and slide block 9 is level and smooth more, and friction factor is more little.Otherwise it is then big.It should be noted that static friction is more much bigger than dynamic friction, during design pushing tow bearing platform 1, overcome the needed power of static friction in the time of considering 5 startings of case beam.
Jack 3 is a fluid pressure type, matches with big flow oil pump, can select the jack of different tonnages according to the size of pushing tow weight.Usually, 2 320 tons jack can be had an high regard for the case beam that reaches 6400 tons.
The structure of slideway 4 as shown in Figure 2, be placed on the slideway outside plate 8 that is set in slideway inner panel 7 outsides by 3--10 slide block 9 and constitute, slideway inner panel 7 by thickness between the 20--30 millimeter, the steel plate of width between the 500--800 millimeter make, slideway outside plate 8 is made by general steel plate or corrosion resistant plate.Slideway outside plate 8 welds solid with slideway inner panel 7.Slide block 9 is made of the polyvinyl chloride tetrafluoro plate that steel plate that studs with 1--5 layer, 2--3 millimeters thick in the rubber layer and rubber layer soffit are stained with the 2--3 millimeters thick securely.
Operating process of the present invention is as follows:
One,--waiting for intensity--removes side form, bed die one prestressing tendon stretch-draw should to finish following working programme before the pushing tow: the concrete pouring of case beam 5.
Two, the afterbody at case beam 5 is symmetrical arranged 2 pushing tow jack 3, too much, can cause asynchronous between the jack, stressed irregular, unstability; Very few, as use single jack, can cause directionality poor again, easily the top is inclined to one side, and is same, also can unstability.Jack 3 lay in place after, connect the oil circuit of each jack and oil pump, start oil pump to jack 3 fuel feeding, jack 3 begins to stretch cylinder, case beam 5 advances thereupon.After jack 3 is covered a stroke, return cylinder again, at this moment, the stroke because case beam 5 has been gone ahead leaves the long space of a stroke, at this moment between jack 3 and the bearing platform 1, the top iron that can add respective length makes the pushing tow counter-force of jack 3 still can be delivered on the bearing platform 1.So circulation, case beam 5 progressively advances.
Also can do suitable adjustment to above-mentioned job practices, its implementation method leans against on the bearing platform 1 that is fixed on the ground of riverbank for the rear portion with jack 3, top iron 2 is withstood in the front portion of jack 3, top iron 2 withstands the afterbody of the case beam 5 of frame on slideway 4 again, between case beam 5 and slideway 4, be lined with slide block 9, slideway 4 is fixed on the bridge pier 6, heads on case beam 5 by jack 3 by top iron 2 and advances.
The present invention is on probation through three times, is convenient to operation, and safety can be saved large number quipments simultaneously, as jack, built-in fitting, pull bar etc., can be widely used in the installation of continuous beam in the bridge.
Claims (3)
1. the construction method of a jacking and pushing bridge box and beam rear part, it is characterized in that top iron (2) leans against on the bearing platform (1) that is fixed on the bridge foundation, the rear portion of jack (3) leans against on the top iron (2), the afterbody of the case beam (5) of frame on slideway (4) is withstood in the front portion of jack (3), between case beam (5) and slideway (4), be lined with slide block (9), slideway (4) is fixed on the bridge pier (6), is pushing away case beam (5) by jack (3) and is advancing.
2. the construction method of jacking and pushing bridge box and beam rear part according to claim 1, the rear portion that it is characterized in that jack (3) leans against on the bearing platform (1) that is fixed on the bridge foundation, top iron (2) is withstood in the front portion of jack (3), top iron (2) withstands the afterbody of the case beam (5) of frame on slideway (4) again, between case beam (5) and slideway (4), be lined with slide block (9), slideway (4) is fixed on the bridge pier (6), heads on case beam (5) by jack (3) by top iron (2) and advances.
3. the construction method of jacking and pushing bridge box and beam rear part according to claim 1 and 2, it is characterized in that slideway (4) is placed on the slideway outside plate (8) that is set in slideway inner panel (7) outside by 3--10 slide block (9) and goes up formation, slideway inner panel (7) by thickness between the 20--30 millimeter, steel plate between the width 500--800 millimeter is made, slideway outside plate (8) is made by common alloy-steel plate or corrosion resistant plate, slideway outside plate (8) will weld admittedly with slideway inner panel (7), and slide block (9) is by studding with the 1--5 layer in the rubber layer, the polyvinyl chloride tetrafluoro plate that the steel plate of 2--3 millimeters thick and rubber layer soffit are stained with the 2--3 millimeters thick securely constitutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95119642 CN1066229C (en) | 1995-12-04 | 1995-12-04 | Construction method of jacking and pushing bridge box and beam rear part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95119642 CN1066229C (en) | 1995-12-04 | 1995-12-04 | Construction method of jacking and pushing bridge box and beam rear part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1139721A true CN1139721A (en) | 1997-01-08 |
| CN1066229C CN1066229C (en) | 2001-05-23 |
Family
ID=5082128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95119642 Expired - Fee Related CN1066229C (en) | 1995-12-04 | 1995-12-04 | Construction method of jacking and pushing bridge box and beam rear part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1066229C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464026C (en) * | 2007-12-19 | 2009-02-25 | 中铁十八局集团有限公司 | Girder-exchange construction method for existing railway bridge by successively incremeantal launching framework process |
| CN101818481A (en) * | 2010-06-04 | 2010-09-01 | 北京城建道桥建设集团有限公司 | Device for performing incremental launching construction on bridge by using multi-roller sliding ways and construction method thereof |
| CN101629409B (en) * | 2009-08-13 | 2011-04-20 | 中铁四局集团有限公司 | Synchronous continuous support pulling construction method of long and large steel box girder |
| CN104562934A (en) * | 2013-10-21 | 2015-04-29 | 湖北华舟重工应急装备股份有限公司 | Bridge pushing mechanism for erection of mechanized bridge |
| CN105908632A (en) * | 2016-05-28 | 2016-08-31 | 中交公局第三工程有限公司 | Hybrid girder cable-stayed bridge closure front girder body pre-bias pushing device |
| CN107988921A (en) * | 2017-10-30 | 2018-05-04 | 四川公路桥梁建设集团有限公司 | A kind of cross-line bridge single-point successively incremeantal launching method construction method of overcrossing railway, highway |
-
1995
- 1995-12-04 CN CN 95119642 patent/CN1066229C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464026C (en) * | 2007-12-19 | 2009-02-25 | 中铁十八局集团有限公司 | Girder-exchange construction method for existing railway bridge by successively incremeantal launching framework process |
| CN101629409B (en) * | 2009-08-13 | 2011-04-20 | 中铁四局集团有限公司 | Synchronous continuous support pulling construction method of long and large steel box girder |
| CN101818481A (en) * | 2010-06-04 | 2010-09-01 | 北京城建道桥建设集团有限公司 | Device for performing incremental launching construction on bridge by using multi-roller sliding ways and construction method thereof |
| CN101818481B (en) * | 2010-06-04 | 2011-05-18 | 北京城建道桥建设集团有限公司 | Device for performing incremental launching construction on bridge by using multi-roller sliding ways and construction method thereof |
| CN104562934A (en) * | 2013-10-21 | 2015-04-29 | 湖北华舟重工应急装备股份有限公司 | Bridge pushing mechanism for erection of mechanized bridge |
| CN104562934B (en) * | 2013-10-21 | 2016-05-04 | 湖北华舟重工应急装备股份有限公司 | A kind of mechanized bridge pushes away bridge mechanism |
| CN105908632A (en) * | 2016-05-28 | 2016-08-31 | 中交公局第三工程有限公司 | Hybrid girder cable-stayed bridge closure front girder body pre-bias pushing device |
| CN107988921A (en) * | 2017-10-30 | 2018-05-04 | 四川公路桥梁建设集团有限公司 | A kind of cross-line bridge single-point successively incremeantal launching method construction method of overcrossing railway, highway |
| CN107988921B (en) * | 2017-10-30 | 2019-11-05 | 四川公路桥梁建设集团有限公司 | A kind of cross-line bridge single-point successively incremeantal launching method construction method of overcrossing railway, highway |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1066229C (en) | 2001-05-23 |
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