CN104963301A - Dragging, translating and lowering device and method for dismantling pier top beam section and pier - Google Patents

Dragging, translating and lowering device and method for dismantling pier top beam section and pier Download PDF

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Publication number
CN104963301A
CN104963301A CN201510385531.1A CN201510385531A CN104963301A CN 104963301 A CN104963301 A CN 104963301A CN 201510385531 A CN201510385531 A CN 201510385531A CN 104963301 A CN104963301 A CN 104963301A
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pier
steel pipe
translation
timber
lowering
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CN104963301B (en
Inventor
朱慈祥
王蔚
盛海军
李少芳
吴威
姜传刚
吴中鑫
马小云
肖一文
曾文锋
洪德红
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Cccc Road & Bridge Special Engineering Co Ltd
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Cccc Road & Bridge Special Engineering Co Ltd
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Abstract

The invention provides a dragging, translating and lowering device for dismantling a pier top beam section and a pier. The device comprises four supporting points, wherein each supporting point comprises four steel pipe piles, four steel pipe supporting frames, four transverse girders, four longitudinal translation beams, two longitudinal translation devices and two lifting and lowering systems; transverse translation beams can move in a transverse direction; the longitudinal translation devices are arranged at the upper parts of the transverse translation beams; the lifting and lowering systems are fixed on the longitudinal translation devices; the transverse translation beams are used for adjusting transverse positions of the lifting and lowering systems; the longitudinal translation devices are used for adjusting longitudinal positions of the lifting and lowering systems; and the lifting and lowering systems are used for lifting or lowering the pier top beam section and the pier. A dragging, translating and lowering method for dismantling the pier top beam section and the pier, provided by the invention, is capable of economically and efficiently solving a dismantling problem of a pier top box beam and pier structure under in the absence of the hoisting of a crane, suitable for dismantling the pier top beam section and the pier of a beam bridge or a bridge with a concrete girder and especially suitable for dismantling engineering for the pier top box beam and pier structure of a multi-span continuous beam bridge using a whole-span lowering dismantling technology.

Description

The dilatory translation downward putting device removed for pier back timber section and bridge pier and method
Technical field
The present invention relates to bridging toughening engineering field, especially a kind of dilatory translation downward putting device of removing for pier back timber section and bridge pier and method.
Background technology
From the seventies in last century, concrete continuous girder bridge, because of its good compliance and economy, extensively uses in China, and built is ten hundreds of.In these bridge use procedures, part bridge: because the operation such as " cracking in webs ", " bottom slab crack ", " roof break " and " middle span deflexion " process self venereal disease evil worsens, the lighter affects structure durability and attractive in appearance, severe one is by the normal use of restriction bridge or cause structural safety problem, as reinforced not become, can only remove.At present, the concrete beam bridge quantity that China is to be removed gets more and more.
Concrete continuous girder bridge is used for main line bridge, overpass bridge, the bridge crossing of city and speedway, there are straight bridge and curved bridge, most spanning gets over road, rivers and valley, and during this kind of bridging toughening, " engineering boundary " complexity (as: during construction, under middle bridge cut-off, lead to by traffic or bridge top-cross usually; Bridge position (front, side) to be torn open does not possess lifting space; Engineered locations is without large-scale crane hoisting equipment; Bridge headroom to be torn open comparatively large (be greater than 5m, even exceed suspension arm of crane high); Need protect bridge side structure during bridging toughening, or have particular/special requirement, and majority does not allow demolition blasting.Realize " complex condition " safety, adapt to, quick, environmental protection, economy, energy-conservation (6 indexs) ground dismantling concrete continuous girder bridge, there is larger " decompose, lift, security control " technical barrier.
One is not had (can not explosion to be carried out at complex condition in prior art, traffic is there is, the complex situations such as flowing water under bridge) the general fast dismantling that carries out bridging toughening construction is except the Demolition Construction method of concrete continuous girder bridge pier back timber section and bridge pier and device thereof.
Summary of the invention
In view of this, the invention provides a kind of based on " static(al) cutting " decomposition technique, " the general dilatory translation downward putting device removed for pier back timber section and bridge pier that the complex condition of computer control hydraulic synchronizing lifting (or jacking) technology carries out bridging toughening construction and method.
For the dilatory translation downward putting device that pier back timber section and bridge pier are removed, it comprises 4 strong points, each support point 4 steel pipe piles, 4 steel pipe supports, 4 horizontal girders, 4 longitudinal translation beams, 2 longitudinal translation devices, 2 lifting lowering system;
Steel pipe pile is symmetricly set on around pier back timber section, and steel pipe pile top is fixedly connected with steel pipe support lower end; Multiple horizontal girder is separately positioned on the adjacent two horizontal steel pipe support tops of pier back timber section side, and horizontal girder and steel pipe form frame construction jointly; Every two panels transverse translation beam is integrally arranged on the horizontal girder end face of bridge pier both sides, and transverse translation beam can transversely move; Longitudinal translation device is arranged on transverse translation beam top; Promoting lowering system is fixed on longitudinal translation device;
Transverse translation beam promotes the lateral attitude of lowering system for adjusting; Longitudinal translation device promotes the lengthwise position of lowering system for adjusting; Promote lowering system and promote or transfer pier back timber section and bridge pier by the suspension centre promoting or transfer pier back timber section and bridge pier.
For the dilatory translation pay-off method that pier back timber section and bridge pier are removed, it is realized by the above-mentioned dilatory translation downward putting device removed for pier back timber section and bridge pier, comprises the following steps:
The dilatory translation downward putting device that S1, in advance installation remove for pier back timber section and bridge pier;
S2, dismounting pier back timber section and bridge pier
The dismounting of pier back timber section: first bore 4 lifting hole(eyelet)s at box beam flange plate design attitude, by transverse shifting transverse translation beam and vertically move longitudinal translation device, four jack are moved to design in advance and bore empty position, then lifting jack steel twisted wire is connected with case beam, Synchronous lifting jack, transverse shifting transverse translation beam and vertically move longitudinal translation device, makes the horizontal and vertical translation of pier top case beam section, and slowly transfer case beam, what namely realize pier back timber section transfers dismounting;
The dismounting of bridge pier: first establish 4 brackets at the design attitude of pier cap beam, promote the suspension centre of transferring as pier cap beam, the method transferred is removed identical with pier back timber section; Again bent cap is arranged 4 brackets with the bridge pier of lower part, the method transferred is removed identical with pier back timber section.
S3, the dismounting of dilatory translation downward putting device of removing for pier back timber section and bridge pier
Pier back timber section and bridge pier are transferred to ground, after pier back timber section and bridge pier complete stability, start to dismantle bracket and transfer ground tackle, after cutting off steel strand, jack is hung together with steel strand above longitudinal translation device, transverse translation beam and horizontal girder, then from top to bottom, remove longitudinal translation device, transverse translation beam and horizontal girder successively, unclamp the set bolt of steel pipe pile and steel pipe support again, remove each sections of steel pipe support, pull out steel pipe pile.
Compared with prior art, its advantage is for the dilatory translation downward putting device removed for pier back timber section and bridge pier provided by the invention and method:
Compliance is good: can solve the dismounting without the pier top case beam under crane hanging component condition and bridge pier structure economical and efficient, be adapted to beam bridge or there is the bridge pier back timber section of concrete girder and the dismounting of bridge pier, and be adapted to especially adopt whole the pier top case beam of multi-span continuous bridge and bridge pier structure projects across transferring demolition technique.
Safe and reliable: to adopt Large Steel pile tube to support, through repeatedly checking, adopt this steel pipe pile foundation+standard sections form steel pipe support, have safe and reliable, be applicable to land, waterborne, etc. being not suitable for doing the platform expanding concrete foundation, secondly, steadily, work progress can suspend at any time for pier back timber section and bridge pier decentralization process.By transverse translation beam and longitudinal translation device, accurately control the suspension centre of lifting.
Speed is controlled: the lifting lowering system that the present invention uses, and has speed even, can suspend at any time, oppositely promote.
Energy-efficient: the lifting lowering system that the present invention uses, lowering velocity, at 5 ~ 15cm/min, shortens work progress, decrease the impact of construction on traffic, meanwhile, improve operating efficiency, the steel pipe support that the present invention uses, jack, Bailey beam, the steel work such as girder are standard knot segmentation and assembly type, takes and tear open conveniently, recycle, there is energy-efficient feature.
Sequential production: the lifting lowering system that the present invention adopts, can use continuously, work progress simple operations, have the feature of sequential production.
Environmental protection: the method that the present invention adopts, work progress is pollution-free, and machinery equipment noise is little, little on surrounding enviroment impact.
Accompanying drawing explanation
Fig. 1 (a) for pier back timber section transfer remove arrange the first state diagram;
Fig. 1 (b) for pier back timber section transfer remove arrange the second state diagram;
Fig. 2 (a) for pier cap beam transfer remove arrange the first state diagram;
Fig. 2 (b) for pier cap beam transfer remove arrange the second state diagram;
Fig. 3 is that steel pipe pile arranges schematic diagram;
Fig. 4 is steel pipe support structural representation;
Fig. 5 (a) is longitudinal translation structure drawing of device;
Fig. 5 (b) is longitudinal translation structure drawing of device;
Fig. 5 (c) is longitudinal translation structure drawing of device.
In accompanying drawing: 1-steel pipe pile, 2-steel pipe support, 3-horizontal girder, 4-transverse translation beam, 5-longitudinal translation device, 6-promote lowering system, 7-bracket, 8-backing plate, 9-steel strand.
Detailed description of the invention
As shown in Fig. 1 to 5 (c), for the dilatory translation downward putting device that pier back timber section and bridge pier are removed, it comprises 4 steel pipe piles, 1,4 steel pipe supports 2, multiple horizontal girder 3,4 transverse translation beam 4, two longitudinal translation devices 5, promotes lowering system 6.
Steel pipe pile 1 is got up by crane lifting, through the leading truck with guiding and temporary fixed function, make steel pipe pile 1 perpendicular to horizontal plane, must not occur crooked, adopt crawler crane lifting vibrating hammer, clamping steel pipe pile 1, by vibrating hammer stake method, be driven underground by steel pipe pile 1, depth of drive for standard, makes it to have enough support forces and safety factor with the requirement for bearing capacity of single steel pipe pile 1.
As shown in Figure 4, steel pipe support 2 can adopt standard knot segmentation to design, single steel pipe support 2 standard support height can be divided into 3 ~ 5 meters of sections and 1 meter of sections, sections is made up of 3 ~ 4 main supports and horizon bar and brace, main support is four steel pipes, the upper and lower two ends of steel pipe all arrange flange, by high-strength bolt and adjacent sections contact steel pipe support 2 integrally.
Horizontal girder 3 is major bearing structures, horizontal girder 3 weight capacity removes pier back timber section and the necessary bending resistance of bridge pier for meeting, can be box shape steel structure, optional the, single spandrel girder is set up by 4 horizontal girders 3 above steel pipe support 2 along bridge cross direction side by side;
Transverse translation beam 4 promotes the lateral attitude of lowering system 6 for adjusting, transverse translation beam 4 two ends are placed on horizontal girder 3 track, laterally cross over pier top case beam and bridge pier, can transversely girder 3 translation, in order to the translation along bridge transverse direction of pier back timber section and bridge pier, transverse translation beam 4 supporting capacity should meet removes pier back timber section and the necessary bending resistance of bridge pier, transverse translation beam 4 can adopt box shape steel structure equally, horizontal girder 3 is established 4 transverse translation beams 4 altogether, 2 transverse translation beams 4 are respectively established at case Liang Liangceyibanchu, midfeather is steel strand 9 penetration hole diameter size, ground tackle is established in steel strand 9 lower end, backing plate 8 and bridge pier side bracket 7 on the downside of the case beam wing plate of ground tackle difference lifting pier top, backing plate 8 and bracket 7 are the structure of direct lifting pier top case beam and bridge pier, certain contact area need be had, reduce the shearing in lifting cross section.
The view of the different angles of the longitudinal translation device 5 as shown in Fig. 5 (a) to 5 (c), longitudinal translation device 5 promotes the lengthwise position of lowering system 6 for adjusting.Longitudinal translation device 5 is for being placed on transverse translation beam 4, and adopting can the steel work of transversely translation beam 4 movement, in order to the translation along bridge longitudinal direction of pier back timber section and bridge pier.
Promote lowering system 6 and promote or transfer pier back timber section and bridge pier for the suspension centre by promoting or transfer pier back timber section and bridge pier, alternatively, promote lowering system 6 and comprise 4 continuous jacks, computer-controlled hydraulic pumping plant and many steel strand 9.Jack steel strand 9, the minimum radical section area of steel strand 9 should meet the requirement of case beam stress, during continuous jack lifting, the lowering velocity of each jack is controlled by computer-controlled hydraulic pumping plant, make case beam remain in same level, reduce the unbalance loading caused by jack unbalance stress.
Steel pipe pile 1 is symmetricly set on around pier back timber section.Steel pipe pile 1 top is fixedly connected with steel pipe support 2 lower end; Multiple horizontal girder 3 is separately positioned on adjacent two horizontal steel pipe support 2 tops of pier back timber section side, and horizontal girder 3 forms frame construction jointly with steel pipe; Every two panels transverse translation beam 4 is integrally arranged on horizontal girder 3 end face of bridge pier both sides, and transverse translation beam 4 can transversely move; Longitudinal translation device 5 is arranged on transverse translation beam 4 top; Promote lowering system 6 to be fixed on longitudinal translation device 5.
The present invention also provides a kind of dilatory translation pay-off method of removing for pier back timber section and bridge pier, and it can be realized by the dilatory translation downward putting device removed for pier back timber section and bridge pier described in above-mentioned any one, comprises the following steps:
The dilatory translation downward putting device that S1, in advance installation remove for pier back timber section and bridge pier.
S2, dismounting pier back timber section and bridge pier
The dismounting of pier back timber section: first bore 4 lifting hole(eyelet)s at box beam flange plate design attitude, by transverse shifting transverse translation beam 4 with vertically move longitudinal translation device 5, four jack are moved to design in advance and bore empty position, then lifting jack steel twisted wire 9 is connected with case beam, Synchronous lifting jack, transverse shifting transverse translation beam 4 and vertically move longitudinal translation device 5, makes the horizontal and vertical translation of pier top case beam section, and slowly transfer case beam, what namely realize pier back timber section transfers dismounting.
The dismounting of bridge pier: first establish 4 brackets 7 at the design attitude of pier cap beam, promote the suspension centre of transferring as pier cap beam, the method transferred is removed identical with pier back timber section; Again bent cap is arranged 4 brackets 7 with the bridge pier of lower part, the method transferred is removed identical with pier back timber section.
S3, the dismounting of dilatory translation downward putting device of removing for pier back timber section and bridge pier
Pier back timber section and bridge pier are transferred to ground, after pier back timber section and bridge pier complete stability, start to dismantle bracket 7 and transfer ground tackle, after cutting off steel strand 9, jack is hung together with steel strand 9 above longitudinal translation device 5, transverse translation beam 4 and horizontal girder 3, then from top to bottom, remove longitudinal translation device 5, transverse translation beam 4 and horizontal girder 3 successively, unclamp steel pipe pile 1 and the set bolt of steel pipe support 2 support again, remove each sections of steel pipe support 2, pull out steel pipe pile 1.
Alternatively, described step S1 comprises the steps:
S11, as shown in Figure 3, determine the position of steel pipe pile 1: the position of transferring according to the width of the pier back timber section of pre-demolition and length and pier back timber section and bridge pier translation, determine four steel pipe pile 1 layout central points, and carry out setting-out, determine steel pipe pile 1 position mid point and outer contour thus again; After setting-out completes, carry out the piling construction of steel pipe pile 1 in setting-out position.
S12, steel pipe support 2 is installed: above the steel pipe pile 1 squeezed into, welded and installed flange, and the position of control flange dish, four flange are kept to coexist in a horizontal plane, within reducing to 0.2cm with the connection error of the standard carriage sections of steel pipe support 2 simultaneously, often across each standard carriage all number, during installation, the order required according to numbering is installed, and note steel pipe support 2 towards, to transfer that steel pipe support 2 is assembled to put in place, adjust verticality and end face absolute altitude, the basis of steel pipe support 2 and steel pipe pile 1 is fixed, screw flange nut, 4 end face absolute altitude differences are less than 10mm, upper and lower verticality is less than 5mm.
S13, horizontal girder 3, transverse translation beam 4 are installed: the horizontal girder 3 processed is lifted the support, top to steel pipe support 2, check whether the end face absolute altitude of steel pipe support 2 and the bottom of horizontal girder 3 meet preset requirement, as undesirable, can choker block steel plate, with bolt, horizontal girder 3 is locked with steel pipe support 2 after meeting the requirements; Horizontal girder 3 end face elevation difference is less than 5mm.
Transverse translation beam 4 is lifted to horizontal girder 3 top, check and whether meet preset requirement bottom horizontal girder 3 end face absolute altitude and transverse translation beam 4, as undesirable, choker block steel plate, after meeting the requirements, longeron and girder are locked by rear bolt (bolt can adopt angle steel to add high-strength bolt or other bolts met the demands).Same longeron two ends end face elevation difference is less than 5mm.
The transverse translation beam 4 processed is lifted to horizontal girder 3 top, checks horizontal girder 3 end face absolute altitude and whether contact good bottom transverse translation beam 4, as undesirable, can choker block steel plate, qualified rear angle steel adds high-strength bolt and longeron and girder is locked.Same longeron two ends end face elevation difference is less than 5mm.
S14, installation longitudinal translation device 5 and lifting lowering system 6: longitudinal translation device 5 and lifting lowering system 6 bolt (bolt can adopt angle steel to add high-strength bolt or other bolts met the demands) are fixed, and lifting is on transverse translation beam 4, assembly pulley is provided with bottom longitudinal translation device 5, can transversely move freely in translation beam 4 direction, be provided with draw-in groove between longitudinal translation device 5 and transverse translation beam 4, move up in the side perpendicular to transverse translation beam 4 in order to limit longitudinal translation device 5.
Promote lowering system 6 and wear cloth steel strand 9, before wearing cloth, steel strand 9 are numbered, carry out in order when wearing cloth, from the bottom up anchor slab is installed, backing plate 8 or bracket 7, hole for hoist bottom case beam, case back portion hole for hoist, anchor slab under jack, the order of upper anchor slab wears cloth successively; Single pretension steel strand 9 to 30% lifting force, ensures steel strand 9 uniform stressed, and checks whether steel strand 9 beat strand.
Alternatively, described step S3 comprises the steps:
After case beam, bent cap and bridge pier are transferred and unloaded completely to ground and jack, carry out the dismounting of steel strand 9, jack.
Check whether steel strand 9 relax, first oxyacetylene metal-cutting slices off the steel strand 9 of shoulder pole girder bottom, lifting jack, mentions steel strand 9 along band, retains the steel strand 9 on jack, in order to avoid next is across repetition jack steel strand 9, after having torn jack and longitudinal translation device 5 open, remove transverse translation beam 4, connecting bolt between the horizontal girder 3 of Panasonic and steel pipe support 2, lifting removes horizontal girder 3, steel pipe support 2 successively; When removing steel pipe support 2, first remove the sections of steel pipe support 2 in outside, after having cut, then utilize crane to remove the sections of the steel pipe support 2 of inner side at bridge floor, go in week next across time, stack steel pipe support 2 sections according to numbering, pull out steel pipe pile 1.
Be understandable that, for the person of ordinary skill of the art, other various corresponding change and distortion can be made by technical conceive according to the present invention, and all these change the protection domain that all should belong to the claims in the present invention with distortion.

Claims (5)

1. the dilatory translation downward putting device removed for pier back timber section and bridge pier, it is characterized in that, it comprises 4 strong points, each support point 4 steel pipe piles, 4 steel pipe supports, 4 horizontal girders, 4 longitudinal translation beams, 2 longitudinal translation devices, 2 lifting lowering system;
Steel pipe pile is symmetricly set on around pier back timber section, and steel pipe pile top is fixedly connected with steel pipe support lower end; Multiple horizontal girder is separately positioned on the adjacent two horizontal steel pipe support tops of pier back timber section side, and horizontal girder and steel pipe form frame construction jointly; Every two panels transverse translation beam is integrally arranged on the horizontal girder end face of bridge pier both sides, and transverse translation beam can transversely move; Longitudinal translation device is arranged on transverse translation beam top; Promoting lowering system is fixed on longitudinal translation device;
Transverse translation beam promotes the lateral attitude of lowering system for adjusting; Longitudinal translation device promotes the lengthwise position of lowering system for adjusting; Promote lowering system and promote or transfer pier back timber section and bridge pier by the suspension centre promoting or transfer pier back timber section and bridge pier.
2. the dilatory translation downward putting device removed for pier back timber section and bridge pier as claimed in claim 1, is characterized in that, promotes lowering system and comprises 4 continuous jacks, computer-controlled hydraulic pumping plant and many steel strand.
3. for the dilatory translation pay-off method that pier back timber section and bridge pier are removed, it is characterized in that, it is realized by the dilatory translation downward putting device removed for pier back timber section and bridge pier as described in any one of claim 1-2, comprises the following steps:
The dilatory translation downward putting device that S1, in advance installation remove for pier back timber section and bridge pier;
S2, dismounting pier back timber section and bridge pier
The dismounting of pier back timber section: first bore 4 lifting hole(eyelet)s at box beam flange plate design attitude, by transverse shifting transverse translation beam and vertically move longitudinal translation device, four jack are moved to design in advance and bore empty position, then lifting jack steel twisted wire is connected with case beam, Synchronous lifting jack, transverse shifting transverse translation beam and vertically move longitudinal translation device, makes the horizontal and vertical translation of pier top case beam section, and slowly transfer case beam, what namely realize pier back timber section transfers dismounting;
The dismounting of bridge pier: first establish 4 brackets 7 at the design attitude of pier cap beam, promote the suspension centre of transferring as pier cap beam, the method transferred is removed identical with pier back timber section; Again bent cap is arranged 4 brackets 7 with the bridge pier of lower part, the method transferred is removed identical with pier back timber section.
S3, the dismounting of dilatory translation downward putting device of removing for pier back timber section and bridge pier
Pier back timber section and bridge pier are transferred to ground, after pier back timber section and bridge pier complete stability, start to dismantle bracket and transfer ground tackle, after cutting off steel strand, jack is hung together with steel strand above longitudinal translation device, transverse translation beam and horizontal girder, then from top to bottom, remove longitudinal translation device, transverse translation beam and horizontal girder successively, unclamp the set bolt of steel pipe pile and steel pipe support support again, remove each sections of steel pipe support, pull out steel pipe pile.
4. the dilatory translation pay-off method of removing for pier back timber section and bridge pier as claimed in claim 3, it is characterized in that, described step S1 comprises the steps:
S11, determine the position of steel pipe pile: the position of transferring according to the width of the pier back timber section of pre-demolition and length and pier back timber section and bridge pier translation, determine four steel pipe pile layout central points, and carry out setting-out, determine steel pipe pile stake position mid point and outer contour thus again; After setting-out completes, carry out the piling construction of steel pipe pile in setting-out position;
S12, steel pipe support is installed: above the steel pipe pile squeezed into, welded and installed flange, and the position of control flange dish, four flange are kept to coexist in a horizontal plane, within reducing to 0.2cm with the connection error of the standard carriage sections of steel pipe support simultaneously, often across each standard carriage all number, during installation, the order required according to numbering is installed, and note steel pipe support towards, to transfer that steel pipe support is assembled to put in place, adjust verticality and end face absolute altitude, the basis of steel pipe support and steel pipe pile is fixed, screw flange nut, 4 end face absolute altitude differences are less than 10mm, upper and lower verticality is less than 5mm,
S13, horizontal girder, transverse translation beam are installed: by the horizontal main cable and girder that processes to the support, top of steel pipe support, check whether the end face absolute altitude of steel pipe support and the bottom of horizontal girder meet preset requirement, as undesirable, choker block steel plate, locks horizontal girder and steel pipe support with bolt after meeting the requirements; Horizontal girder end face elevation difference is less than 5mm;
By the lifting of transverse translation beam to horizontal girder top, check and whether meet preset requirement bottom horizontal girder end face absolute altitude and transverse translation beam, as undesirable, choker block steel plate, locks longeron and girder with bolt after after meeting the requirements.Same longeron two ends end face elevation difference is less than 5mm;
S14, installation longitudinal translation device and lifting lowering system: longitudinal translation device and lifting lowering system bolt are fixed, and lifting is on transverse translation beam, assembly pulley is provided with in longitudinal translation bottom of device, can transversely move freely in translation beam direction, be provided with draw-in groove between longitudinal translation device and transverse translation beam, move up in the side perpendicular to transverse translation beam in order to limit longitudinal translation device;
Promote lowering system and wear cloth steel strand, be numbered steel strand before wearing cloth, carry out in order when wearing cloth, install anchor slab from the bottom up, backing plate or bracket, hole for hoist bottom case beam, case back portion hole for hoist, anchor slab under jack, the order of upper anchor slab wears cloth successively; Single pretension steel strand to 30% lifting force, ensures steel strand uniform stressed, and checks whether steel strand beat strand.
5. the dilatory translation pay-off method of removing for pier back timber section and bridge pier as claimed in claim 3, it is characterized in that, described step S3 comprises the steps:
After case beam, bent cap and bridge pier are transferred and unloaded completely to ground and jack, carry out the dismounting of steel strand, jack;
Check whether steel strand relax, first oxyacetylene metal-cutting slices off the steel strand of shoulder pole girder bottom, lifting jack, mentions steel strand along band, retains the steel strand on jack, in order to avoid next is across repetition jack steel strand, after having torn jack and longitudinal translation device open, remove transverse translation beam, connecting bolt between the horizontal girder of Panasonic and steel pipe support, lifting removes horizontal girder, steel pipe support successively; When removing steel pipe support, first remove the sections of steel pipe support in outside, after having cut, then utilize crane to remove the sections of the steel pipe support of inner side at bridge floor, go in week next across time, stack steel pipe support sections according to numbering, pull out steel pipe pile.
CN201510385531.1A 2015-06-30 2015-06-30 The dilatory translation downward putting device and method removed for pier top beam section and bridge pier Active CN104963301B (en)

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CN106337372A (en) * 2016-08-29 2017-01-18 武汉二航路桥特种工程有限责任公司 System safety control method for cutting and removing concrete bridge
CN106436594A (en) * 2016-08-16 2017-02-22 武汉二航路桥特种工程有限责任公司 Walking pushing translation dismantling method of beam bridge in uniform-cross section way
CN106567335A (en) * 2016-11-01 2017-04-19 中铁大桥勘测设计院集团有限公司 Bridge construction hoisting system on bridge traveling crane carriageway slab
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CN107190645A (en) * 2017-05-28 2017-09-22 吴淑霞 A kind of construction roof beam structure
CN107675636A (en) * 2017-09-08 2018-02-09 武汉二航路桥特种工程有限责任公司 A kind of universal bridge structure thing method for dismounting and system
CN109537477A (en) * 2018-12-11 2019-03-29 北京市政路桥股份有限公司 A kind of portal frame removes the construction method of old beam
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