CN102995571B - Method for prepressing single large-tonnage temporary steel pipe support and then resisting beam bottom during dismantling bridge beam body, and device thereof - Google Patents
Method for prepressing single large-tonnage temporary steel pipe support and then resisting beam bottom during dismantling bridge beam body, and device thereof Download PDFInfo
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- CN102995571B CN102995571B CN201210326296.7A CN201210326296A CN102995571B CN 102995571 B CN102995571 B CN 102995571B CN 201210326296 A CN201210326296 A CN 201210326296A CN 102995571 B CN102995571 B CN 102995571B
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Abstract
The invention discloses a method for prepressing a single large-tonnage temporary steel pipe support and then resisting a beam bottom during dismantling a bridge beam body, and a device thereof. The method comprises the following steps that: bracket devices are symmetrically arranged at the lateral wall below the top part of the steel pipe; each bracket device is provided with a lifting jack; the beam body is used as a reaction frame; the beam bottom is synchronously lifted by two jacks which are symmetrically arranged along the circumference of the steel pipe; the steel pipe is pre-pressed and jacked to the place, and then chucks are symmetrically punched between the top part of the steel pipe and the beam bottom; and finally the jacks slowly discharge oil; and the preloading amount of the steel pipe is converted into active force for temporarily supporting the steel pipe, so as to achieve prepressing of a single large-tonnage temporary steel pipe support and resisting of the beam bottom. The difficulty of prepressing the large-tonnage steel pipe when the bridge is dismantled is reduced by the method; the settling volume of the bracket when the beam body is cut off and falls off and the impact force when the system is converted are greatly reduced, and the method is good in adaptability, simple in structure, convenient to fabricate, good in operability, safe and reliable.
Description
Technical field
The invention belongs to bridge strengthening and Demolishing Technology, be specifically related to hold out against technology after the precompressed of single large-tonnage temporary steel pipe holder with at the bottom of beam when a kind of bridge beam body is removed.
Background technology
In bridge strengthening and projects, need the construction carrying out temporary support in the space of beam body bottom; Because the beam body superstructure completed for use has formed the structure of large volume, construction space under beam body is limited, the steel pipe support of temporary support is set up to bear the load of large-tonnage beam body at the bottom of beam, it not only needs precompressed to guarantee the supporting capacity of steel pipe support, need to ensure that steel pipe support initiatively first holds out against, impact force during minimizing beam body drop frame when the passive stressed settling amount of steel pipe support and system transform simultaneously.Therefore, the precompressed of steel pipe support at the bottom of beam can not be realized by preloading.Generally, after at the bottom of beam, steel pipe support is in place, reserved certain space (2cm ~ 20cm) between at the bottom of steel pipe top flanged plate and beam, this space is finally filled by the timber wedge of fighting each other, so, how to choose suitable preloading method, both realize the precompressed of steel pipe support at the bottom of confined space inner beam, ensure that again steel pipe support active force holds out against at the bottom of beam, this new difficult problem.
For solving this difficult problem, the direct preloading of general employing carries out precompressed to the stand steel pipe bottom beam now.The method directly arranges jack at steel pipe support flanged plate top to act on the method for carrying out precompressed at the bottom of beam.When distance between at the bottom of general steel pipe top flanged plate and beam is no less than 5cm, ultra-thin jack (stroke is limited) precompressed can be adopted, but the timber wedge at steel pipe support flanged plate top is by bad construction, cannot be covered with, and precompressed amount (steel tube elastic compression+settlement of foundation) can not meet requirement, therefore, although direct preloading at the bottom of steel pipe top flanged plate and beam between distance economically feasible when being no less than 5cm, lack applicability and versatility.
Summary of the invention
A kind of method held out against after the precompressed of single large-tonnage temporary steel pipe holder and at the bottom of beam when the object of the present invention is to provide bridge beam body to remove and device thereof, to solve the problem.
One of technical solution of the present invention is: when bridge beam body is removed after the precompressed of single large-tonnage temporary steel pipe holder and the method held out against at the bottom of beam, it be below steel pipe top sidewall on be symmetrical arranged bracket device, each bracket device arranges jack, as reaction frame at the bottom of beam, utilize at the bottom of the symmetrically arranged multiple jack synchronization of jacking up beam of steel pipe circumference, implement to hold out against the precompressed of steel pipe to put in place, between again at the bottom of steel pipe top and beam, symmetry makes timber wedge wedging, the slow emptying of last jack, the precompressed amount of steel pipe is converted to the active force of falsework steel pipe, thus hold out against after realizing the precompressed of single large-tonnage steel pipe support He at the bottom of beam.For many large-tonnage steel pipes precompressed at the bottom of beam, after the specialized designs of preloading method, precompressed order, prefabricating load, can repeatedly turnover device, the synchronous slowly precompressed of symmetry carrying out many (2,4) large-tonnage steel pipes holds out against operation.
The sidewall of the inventive method below steel pipe top is symmetrical arranged bracket device, each bracket device arranges jack, improve the arrangement space of jack on the one hand, increase jack apolegamy scope, timber wedge wedging can be made between on the other hand at the bottom of steel pipe top and beam, improve the stability supported.
The supporting surface of described bracket device is 10cm ~ 30cm to the distance of steel pipe end face, and meet distance than the height of the jack large 5 ~ 20cm (adjustment supporting steel pipe height) of supporting surface to soffit of bracket device, so that the installation of bracket device, jack.
Described bracket device comprises horizontal supporting plate, and horizontal supporting plate is connected with riser, is connected tilt prop between horizontal supporting plate with riser; Riser is provided with the arc surface riser matched with steel pipe circular arc side relative to steel pipe circular arc side.
Infill panel is provided with between described riser and arc surface riser.
Said structure is convenient to in-site installation, utilizes existing parts to be connected, and reduces the manufacturing cost of component.
Described jack is axially symmetricly set on steel pipe sidewall along beam body.
Two of technical solution of the present invention is: large-tonnage falsework steel pipe precompressed holding device at the bottom of beam, it comprises falsework steel pipe, and on the sidewall below steel pipe top, symmetrical releasable connection bracket device, each bracket device arranges jack.
Enforcement structure is simple, improves the arrangement space of jack, and increase jack apolegamy scope, detachable bracket device syndeton can realize the dismounting of bracket device, realizes prepressing device turnover recycling, increases economic efficiency significantly.
The supporting surface of described bracket device is 10cm ~ 30cm to the distance of steel pipe end face.
Preferred support distances is convenient to the installation of bracket device, jack.
Described bracket device comprises horizontal supporting plate, and horizontal supporting plate is connected with riser, is connected tilt prop between horizontal supporting plate with riser; Riser is provided with the arc surface riser matched with steel pipe circular arc side relative to steel pipe circular arc side.
Infill panel is provided with between described riser and arc surface riser.
Said structure is convenient to in-site installation, utilizes existing parts to be connected, and reduces the manufacturing cost of component.
Described jack is longitudinally symmetricly set on steel pipe sidewall along beam body, and acts on the real abdominal section of beam body.This one side structure is convenient to connect and dismounting, is also conducive to holding out against being uniformly distributed of precompression.
The technical characterstics such as this invention has that compliance is good, structure is simple, easy to make, good operability, safe and reliable, good economy performance, utilization prospect are good:
Compliance is good: the difficult problem that the precompressed solving the large-tonnage steel pipe holder under exist curves structure holds out against, the difficulty of large-tonnage steel pipe precompressed when decreasing bridging toughening; Both be adapted to Bridge repair and reinforcement and adopted steel pipe support jacking engineering, and be adapted to again bridge and adopt steel pipe support projects; Be adapted to solid beam, be also adapted to case beam.
Structure is simple: the function that the precompressed only needing the combination of simple jack system, bolt, steel corbel etc. both can realize large-tonnage steel pipe holder holds out against.
Easy to make: the parts that this device needs are shaped article on market, can be realized by rationalization.
Good operability: when precompressed holding device uses, only need 1 commander in chief's hand, 1 pumping plant operator, 2 jack management and control hands can have been organized.
Safe and reliable: a whole set of precompressed holding device is shaped article, system synthesis each ingredient degree of safety is high; Work progress special-less process, stable conditions, is convenient to control, and greatly reduces impact force during settling amount and the system transform of support when beam body blocks frame.
Good economy performance: 1. precompressed holding device is primarily of market formed product composition, can Assembling and processing, and the cost of implement device itself is lower; 2. do not need special counter force system, fully use the deadweight of case beam as reaction frame, save a large amount of preloading costs; 3. precompressed holding device can Reusability, and a large amount of steel pipe support precompressed turnovers has good economic benefit.
Utilization prospect is good: the method that the precompressed of large-tonnage steel pipe holder holds out against and device thereof are that conventional steel pipe support provides guarantee in bridge strengthening and projects, show good technical characterstic and superior economic performance, realize prepressing device turnover recycling; There is good application prospect.
Accompanying drawing explanation
The layout schematic diagram I of falsework steel pipe when Fig. 1 bridge beam body is removed.
The layout schematic diagram II of falsework steel pipe when Fig. 2 bridge beam body is removed.
Fig. 3 stand steel pipe top structure schematic diagram.
Fig. 4 Fig. 3 B-B direction schematic diagram.
Detailed description of the invention
As shown in Figure 1, the layout of bridge beam body 100 and falsework steel pipe 200, the label 0# ~ 19# in figure Bridge beam body 100 represents 20 beam sections of bridge beam body 100; Arrange multiple falsework steel pipe 200 along 20 beam sections, stand steel pipe 200 is arranged on concrete continuous footing 300, and stand steel pipe 200 top arranges precompressed and holds out against structure.Two stand steel pipe 200 are established, as shown in Figure 2 in same section.
Large-tonnage falsework steel pipe precompressed holding device at the bottom of beam as shown in Figure 3, under stand steel pipe 200 top distance bracket steel pipe 200 end face (steel pipe top flanged plate), 20 ~ 50cm offers through connecting hole 201, and connecting hole 201 is axially symmetrically connected with two bracket devices 280 by nut-screw structure 202 along beam body.Two bracket device 280 structures are identical, and arranged direction is contrary.
As shown in Figure 3, bracket device 280 comprises the riser 281 be connected with nut-screw structure 202, riser 281 upper end is connected with horizontal supporting plate 282, arranges and be connected tilt prop 283 between riser 281 with horizontal supporting plate 282, and riser 281, flat gripper shoe 282 adopt rectangular steel plates.Be welded to connect between above-mentioned parts and form stable braced structures.As shown in Figure 4, in order to make riser 281 better fit, at the arc surface riser 284 that riser 281 matches with steel pipe circular arc side with the circular arc side of stand steel pipe 200.Cambered surface riser 284 can be intercepted by steel pipe and form.Infill panel 285 is provided with between riser 281 and cambered surface riser 284, gap between vertical riser 281 and cambered surface riser 284 is tamped by infill panel 285, and riser 281 and cambered surface riser 284 are coupled together, steel plate, rod iron and weld seam can be adopted to combine as filler, ensure that contact holds out against reliably.
As shown in Figure 3, horizontal supporting plate 282 is 10cm ~ 30cm apart from steel pipe top flanged plate less than 203 distance, horizontal supporting plate 282 is arranged jack 300, and two jack 400 are axially symmetrical arranged along beam body.The end face of the piston rod of jack 400 is provided with the backing plate 401 matched with the soffit of bridge beam body 100.
Said structure can be implemented stand steel pipe 200 again and vertically locate construction in stand steel pipe 200 after installation, also can install at stand steel pipe 200 top after stand steel pipe 200 vertically location construction again.
After said structure is installed at stand steel pipe 200 top, start two jack 400, make the soffit synchronization implementation jacking of two jack, 400 pairs of bridge beam body 100, under reaction force at the bottom of the beam of bridge beam body 100, two jack 400 synchronously carry out precompressed to stand steel pipe 200 and hold out against, and hold lotus certain hour (by relevant pile measurement regulation enforcement) when the appointment tonnage presses reaching synchronization of jacking up precompressed is that (being generally the design load of 1.2 times) is stable; Between again at the bottom of steel pipe top flanged plate and beam, symmetry is made timber wedge 500 (timber wedge is trapezoid cross section cylinder, tiltedly cutd open to be divided into two by cuboid timber and form, the overall height of urgent timber wedge controls to be no more than 20cm) wedging, the direction playing timber wedge is that direction across bridge is consistent, ensures that the application point of jack jacking application point and timber wedge is immediately below the web of case beam; The slow emptying of last jack, is converted to the active force of support by the precompressed amount of steel pipe support, thus the object held out against after realizing the precompressed of single large-tonnage steel pipe support and at the bottom of beam.
Many steel pipe supports 200 as shown in Figure 1, Figure 2, by turnover bracket device 280, hold out against by root precompressed; Also many (2,4) can hold out against (special prefabricating load design need be carried out) according to synchronous slowly precompressed symmetrical from beam body 100 one end to the other end, prevent the excessive stability reducing beam body 100 to be torn open of synchronization precompressed amount.
Claims (10)
1. when a bridge beam body is removed after the precompressed of single large-tonnage temporary steel pipe holder and the method held out against at the bottom of beam, it be below steel pipe top sidewall on be symmetrical arranged bracket device, each bracket device arranges jack, beam body is as reaction frame, utilize at the bottom of symmetrically arranged 2 the jack synchronization of jacking up beams of steel pipe circumference, implement to put in place to the precompressed of steel pipe, between again at the bottom of steel pipe top and beam, symmetry makes timber wedge wedging, the slow emptying of last jack, the precompressed amount of steel pipe is converted to the active force of falsework steel pipe, thus hold out against after realizing the precompressed of single large-tonnage steel pipe support He at the bottom of beam.
2., when bridge beam body is removed as claimed in claim 1 after the precompressed of single large-tonnage temporary steel pipe holder and the method held out against at the bottom of beam, it is characterized in that the supporting surface of described bracket device is 10cm ~ 30cm to the distance of steel pipe end face.
3. when bridge beam body is removed as claimed in claim 1 or 2 after the precompressed of single large-tonnage temporary steel pipe holder and the method held out against at the bottom of beam, it is characterized in that described bracket device comprises horizontal supporting plate, horizontal supporting plate is connected with riser, is connected tilt prop between horizontal supporting plate with riser; Riser is provided with the arc surface riser matched with steel pipe circular arc side relative to steel pipe circular arc side.
4., when bridge beam body is removed as claimed in claim 3 after the precompressed of single large-tonnage temporary steel pipe holder and the method held out against at the bottom of beam, it is characterized in that being provided with infill panel between described riser and arc surface riser.
5., when bridge beam body is removed as claimed in claim 1 after the precompressed of single large-tonnage temporary steel pipe holder and the method held out against at the bottom of beam, it is characterized in that described jack is longitudinally symmetricly set on steel pipe sidewall along beam body, and act on the real abdominal section of beam body.
6. based on a falsework steel pipe precompressed holding device at the bottom of the beam of method according to claim 1, it comprises falsework steel pipe, and symmetrical releasable connection bracket device on the sidewall that it is characterized in that below steel pipe top, each bracket device arranges jack.
7. falsework steel pipe precompressed holding device at the bottom of beam as claimed in claim 6, is characterized in that the supporting surface of described bracket device is 10cm ~ 30cm to the distance of steel pipe end face.
8. falsework steel pipe precompressed holding device at the bottom of beam as claimed in claims 6 or 7, it is characterized in that described bracket device comprises horizontal supporting plate, horizontal supporting plate is connected with riser, is connected tilt prop between horizontal supporting plate with riser; Riser is provided with the arc surface riser matched with steel pipe circular arc side relative to steel pipe circular arc side.
9. falsework steel pipe precompressed holding device at the bottom of beam as claimed in claim 8, is characterized in that being provided with infill panel between described riser and arc surface riser.
10. falsework steel pipe precompressed holding device at the bottom of beam as claimed in claim 6, is characterized in that described jack is longitudinally symmetricly set on steel pipe sidewall along beam body, and acts on the real abdominal section of beam body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210326296.7A CN102995571B (en) | 2012-09-05 | 2012-09-05 | Method for prepressing single large-tonnage temporary steel pipe support and then resisting beam bottom during dismantling bridge beam body, and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210326296.7A CN102995571B (en) | 2012-09-05 | 2012-09-05 | Method for prepressing single large-tonnage temporary steel pipe support and then resisting beam bottom during dismantling bridge beam body, and device thereof |
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| Publication Number | Publication Date |
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| CN102995571A CN102995571A (en) | 2013-03-27 |
| CN102995571B true CN102995571B (en) | 2015-06-24 |
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| CN201210326296.7A Active CN102995571B (en) | 2012-09-05 | 2012-09-05 | Method for prepressing single large-tonnage temporary steel pipe support and then resisting beam bottom during dismantling bridge beam body, and device thereof |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321160B (en) * | 2013-05-23 | 2015-09-09 | 中冶交通工程技术有限公司 | A kind of pre-pressing bracket apparatus and method |
| CN103352437A (en) * | 2013-06-19 | 2013-10-16 | 北京市政路桥管理养护集团有限公司 | Quick beam lowering method based on bridge synchronous jacking and overall replacement |
| CN104560065B (en) * | 2013-10-22 | 2017-02-15 | 五冶集团上海有限公司 | False corbel bracket and using method thereof during examining and repairing corbel bricks in dry quenching chute |
| CN103835500B (en) * | 2013-12-19 | 2016-01-20 | 中铁大桥局集团第一工程有限公司 | Heavy-duty floor-type steel pipe support unload Demolition Construction method |
| CN105064717B (en) * | 2015-07-24 | 2017-03-29 | 武大巨成结构股份有限公司 | A kind of construction method of steel slideway jacking architecture adding-floor |
| CN105088974B (en) * | 2015-08-14 | 2016-08-24 | 宁波市标新机械科技有限公司 | Attending device cleared up automatically by a kind of solar energy for bridge |
| CN106638336B (en) * | 2016-10-21 | 2018-08-10 | 中国水利水电第八工程局有限公司 | Cross-line continuous beam method for dismounting and dismounting holder |
| CN109827008A (en) * | 2019-02-22 | 2019-05-31 | 上海市基础工程集团有限公司 | For being leaned on after the steel in jacking construction |
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| KR20020095523A (en) * | 2001-06-14 | 2002-12-27 | 조영철 | Method and apparatus for lifting upper portion of bridge |
| KR20050018195A (en) * | 2003-08-14 | 2005-02-23 | 노윤근 | large number bracket in which supporter was installed is used and it is a bridge, multiplex point installed so that support might be carried out support bracket and its installation method |
| CN1696407A (en) * | 2005-06-14 | 2005-11-16 | 河北道桥特种工程有限公司 | Technique for replacing supporters for continuous beam without breaking off traffic |
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| CN102995571A (en) | 2013-03-27 |
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Effective date of registration: 20191216 Address after: 100011 Building 8, Jiangsu building, No. 88, andingmenwai street, Dongcheng District, Beijing Patentee after: China Communications Infrastructure Maintenance Group Co., Ltd. Address before: 430071, 20 floor, East Sha tower, No. 122 North Central Road, Wuchang, Hubei, Wuhan Patentee before: CCCC Road & Bridge Special Engineering Co., Ltd. |
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