CN100540809C - The replacing supporters for continuous beam without breaking off traffic method - Google Patents
The replacing supporters for continuous beam without breaking off traffic method Download PDFInfo
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- CN100540809C CN100540809C CNB2005100126053A CN200510012605A CN100540809C CN 100540809 C CN100540809 C CN 100540809C CN B2005100126053 A CNB2005100126053 A CN B2005100126053A CN 200510012605 A CN200510012605 A CN 200510012605A CN 100540809 C CN100540809 C CN 100540809C
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Abstract
The present invention relates to a kind of replacing supporters for continuous beam without breaking off traffic method, the method or the equipment technical field that belong to maintenance or reinforce existing bridge.Utilize the jacking jack and adopt multiple spot synchronization of jacking up control device to make whole continuous bridge tie up to synchronous lifting under the enough big multiple spot top lift effect, making does not vertically have amount of deflection or amount of deflection is controlled in the stressed allowed band of system, horizontal each point relative displacement is controlled in the limited field, and influence is less relatively to top lift to make under the condition of not breaking off a friendship light weight by traffic control, old bearing is spread out, more renew bearing.Characteristics of the present invention are: can not remove under the continuous situation of bridge floor and carry out under the situation of traffic control, safety and steady ground carries out the replacing bearing construction operation of continuous beam on many supports, short construction period can be the Construction Party and saves great amount of investment, brings very big economic benefit and social benefit.
Description
Technical field
The method or the equipment technical field that the invention belongs to maintenance or reinforce existing bridge specifically are that a kind of continuous beam is not broken off a friendship and changed the method for bearing.
Background technology
Have tangible advantage because neoprene bearing is compared the bearing of other form, thereby in the bridge of building at present, generally adopt neoprene bearing.But along with the operation time limit increase, the increase of the traffic volume, add reasons such as design, construction wrong, aging and heavily loaded traffic, cause diseases such as part bearing generation inefficacy distortion, bearing failure or shear failure, make the general disease that bearing destroys to be become in the bridge maintenance.The current job practices commonly used of bearing replacement is with ordinary jack beam slab jack-up to be come, and removes the damage bearing, settles new bearing again.Recently some engineerings have adopted more advanced synchronization of jacking up constructure scheme, utilize computer control that bridge is carried out integral body (particularly direction across bridge) jacking synchronously, accelerated construction speed, particularly farthest reduced because of the additional internal force of relative displacement the beam slab generation, guarantee the quality of beam body, relatively had typical representational engineering that a day golden Lion Grove Garden bridge bearing replacement engineering, the female interchange viaduct bearing replacement of Shenzhen king engineering are arranged.Yet (comprise advanced synchronization of jacking up scheme) in the above-mentioned various constructure scheme a common precondition is arranged, must break off a friendship when constructing exactly; If continuous beam must disconnect continuous part during jacking, could construct.And current each high-speed transit amount is all very big, and bring very big pressure will for owner, road administration and traffic police a couple of days that suspends traffic.If engineering continues for some time, the economic loss and the social influence that bring are inestimable.This becomes the one of the main reasons that at present a lot of multispan footpath continuous beam bearing disease delays to solve.
Summary of the invention
The purpose of this invention is to provide a kind of replacing supporters for continuous beam without breaking off traffic method, it can not removed under the continuous situation of bridge floor and not break off a friendship and carry out under the situation of traffic control, safety and steady ground carries out the replacing bearing construction operation of continuous beam on many supports, thereby can bring bigger economic benefit and social benefit.
Main technical schemes of the present invention is: a kind of technique for replacing supporters for continuous beam without breaking off traffic, it is characterized in that utilizing the jacking jack and adopt the synchronously continuous jacking control device of multiple spot to make whole continuous bridge tie up to synchronous lifting under the enough big multiple spot top lift effect, making does not vertically have amount of deflection or amount of deflection is controlled in the stressed allowed band of system, horizontal each point relative displacement is controlled in the limited field, and influence is less relatively to top lift to make under the condition of not breaking off a friendship light weight by traffic control, old bearing is spread out, more renew bearing.
Can be at the upper and lower dowel bar of establishing of above-mentioned jacking jack, last dowel bar evenly is delivered to the weight of bridge superstructure on the jack at each fulcrum place, preventing the stressed excessive overburden operation of indivedual jack and to damage, prevent the superstructure discontinuity simultaneously and tilt or produce relative displacement.
For the load that prevents to drive a vehicle to the impact of top lift system, baffle structure (generally adopting high-intensity lubricity high-abrasive material) is set between being preferably at the bottom of dowel bar and the beam slab.
For ease of the placement of jack and be adapted to the different situations of bridge, can be provided with jack jacking support, its structure is: basket-hanging support, telescoping column cribbing, shellfish thunder sheet trussed construction support or universal rod body steel bracket etc.; When having certain clear height between at the bottom of the end face of bent cap and the beam slab, also jack can be set on bent cap directly, and without support.
Carrying out ground for telescoping column cribbing, shellfish thunder sheet trussed construction support or the visual ground situation of universal rod body steel bracket handles, except that taking conventional ground processing, the big shaped steel of bending rigidity can be set carry out floor file, evenly stressed to guarantee whole ground, each fulcrum place sedimentation value is less than the displacement limit value.
Setting up when design only stating jack jacking support, is to guarantee construction safety, and compressive strength and flexural strength can consider that the monolithic stability property coefficient can be not less than 1.5 by 2.0 safety factor.Top lift is set more than two times of position bridge system deadweight that are preferably a synchronization of jacking up.
Above-mentioned multiple spot jacking control device is good to adopt 8 synchronization of jacking up SPLC-4-8 control systems; mainly by hydraulic system; detecting sensor; computer control system is formed; hydraulic system is by computer control; and be provided with the synchronous shift Stroke Control; load pressure control; operation locking; promptly stop; process shows and fault alarm; automatic safety device and control circuit thereof; be equipped with the oil cylinder hydraulic control one-way valve and can prevent any type of system and pipeline decompression; thereby proof load is effectively supported; all oil cylinders can be operated simultaneously also and can operate separately; the Synchronization Control number of spots can be provided with as required, is applicable to the synchronous shift of large volume building or member.Also can adopt other multiple spot jacking control device.
Above-mentioned traffic control can be, and limiting vehicle speed is in 40 kilometers, and load limit is in 80 tons, and route or travel by vehicle is limited in the position of hogging moment maximum from the cross section.
In order to reduce the direct impact force of load to the shrinkage joint; can adopt the shrinkage joint treatment measures; promptly lay hard and soft bond and carry out the power transmission power that disappears at shrinkage joint place; flexible thing works the power effect that disappears following, protects that the shrinkage joint is not hit, crimp, and rigid board is last; impact force is carried out in length and breadth to distribution; reduce the direct impact force of load, can on hard and soft bond, evenly spread shop one deck particle, play levelling, buffering, decelerating effect the shrinkage joint.
Stability for temporary fixed stage that guarantees the beam body after jacking process and jacking does not produce and safety work, can be provided with beam body steel work fixed mount, or the fixed system formed of beam body steel work fixed mount and anchor line.
Above-mentioned old bearing, new bearing can be neoprene bearing, also can be other types bearing etc.Characteristics of the present invention are: can not remove under the continuous situation of bridge floor and not break off a friendship and carry out under the situation of traffic control, safety and steady ground carries out the replacing bearing construction operation of continuous beam on many supports, short construction period, can be the Construction Party and save great amount of investment, bring very big economic benefit and social benefit, thereby solved ubiquitous problem in the present construction technology well.
Be described further below in conjunction with certain bridge continuous beam bearing replacement embodiment that do not break off a friendship, but not as a limitation of the invention.For example, in two continuous box girders of certain bridge K228+047 and K230+517 the bridge seat breakage more serious, be badly in need of to change, the concrete job practices of the present invention is as follows.
Description of drawings
Fig. 1 is its bridge pier jack location arrangements elevation.
Fig. 2 is its bridge pier jack location arrangements plan view.
Fig. 3 is its abutment jack location arrangements elevation.
Fig. 4 is its abutment jack location arrangements plan view.
Fig. 5 is a basket-hanging supporting structure schematic diagram.
Fig. 6 is a telescoping column cribbing structural representation.
Fig. 7 is a stable fixed structure schematic diagram between the telescoping column cribbing.
Fig. 8 is a beam body fixed system schematic diagram.
The specific embodiment
Referring to Fig. 1, Fig. 2,1 is bearing, and 2 is main jack, and 3 is bent cap, and 4 is the beam slab bottom, and 5 is the jack working platform, and 6 is bridge pier, and 7 is telescopic jacking frame.
Referring to Fig. 3, Fig. 4,1 is bearing, and 8 are thin jack, and all the other labels are the same.
Referring to Fig. 5,10,11,13 is steel plate, and 12 is channel-section steel, and 14 is triangle concrete steel plate, is welded construction; 9 for linking screw rod; Put jack on the steel plate 13; 15 is pier column, and surplus number the same.
Referring to Fig. 6,16 is flange, and 17 is steel plate, and 18 is the angle steel hoop, and 19 are channel-section steel (each tube establish 4 roads), is provided with in the sleeve that to add sand 20,21 be the base board flange dish.
Referring to Fig. 7,22 is the same fixed beam of pin hand.
Referring to Fig. 8,23 is horizontal U type hoop, and whole beam body hoop at one, is provided with interim cushion block simultaneously between block and side bar, and the constraint lateral displacement to big cantilever construction, is laterally set up full framing, cantilever end is carried out rest fix; Temporary support is set at the bottom of beam after the jacking.It is continuous vertically not remove bridge floor, makes whole top form an integral body; The two ends, shrinkage joint can not removed, and parados forms certain constraint to the beam body.
Concrete job practices is as follows:
1, ground processing and support are set up.Because construction site is the gravel stratum, geology is better, with the two-layer sleeper in directly close on the ground shop after original ground leveling and the compacting (longitudinal and transverse bridge is to arranging), lays the supporting-point of dowel bar as the steel pipe support montant above the sleeper, the even power transmission effect of having held concurrently prevents the scaffold differential settlement.Prop up top of the trellis and place dowel bar, guarantee that each jack support reaction evenly is delivered on the scaffold.
2, synchronization of jacking up system layout.This engineering adopts the two-way cylinder jacking, at first, consider the support sedimentation take place when this bridge is newly-built that the both sides, cross section sink according to accompanying drawing 1 connection line, make the support reaction of limit bearing be far longer than the support reaction of middle bearing, so on jack is arranged, stress to increase the quantity of both sides jack.
3, lay jack.After connecting jack and circuit by wiring diagram, earlier in ground no-load running debugging, debug qualified then the installation on support by Fig. 1, Fig. 2, controller and oil pump are installed in the bridge side.Press shown position setting pressure sensor and displacement transducer then.
Between at the bottom of the power transmission facility on jack top and the beam, be provided with and offset or reduce the particular facility of lateral forces such as automobile braking force, impact force the jack effect.The general friction factor that adopts is especially little and wearing layer material that intensity is high is made, and smears high lubricated siliceous oil on the corrosion resistant plate as adopting.
4, traffic control.Vehicle is carried out the control of speed limit limit for tonnage, and speed limit is in 40 kilometers; Load limit in 80 tons, the indivedual vehicles more than 80 tons, charge station shunts from the place ahead; According to highway maintenance engineering safety construction regulations, lay traffic sign; Beginning to a track transition from 300 meters of end of the bridge, 100 meters, 50 meters are provided with three deceleration strips; Route or travel by vehicle is limited in centre position from the cross section.
5, measure is managed at the shrinkage joint everywhere.Take hard and soft bond as disappearing the power facility at shrinkage joint place, carry out the power transmission power that disappears, flexible thing works the power effect that disappears following; the protection shrinkage joint is not hit, crimp; the rigidity thing is last, and impact force is carried out in length and breadth reducing the direct impact force of load to the shrinkage joint to distribution.Evenly spread shop one deck particle above the hard and soft bond, play levelling, buffering, decelerating effect.(10～15MM) paste conveyer belts is placed on the shrinkage joint general employing steel plate, and steel plate is last, and conveyer belt is descending size 5 * 1M.
6, back timber.Top lift is set at more than two times of position bridge system deadweight of a synchronization of jacking up, bearing support set up design the time compressive strength and flexural strength all consider that by 2.0 safety factor the monolithic stability property coefficient is not less than 1.5 (the same prior arts of computational methods).Multiple spot jacking control device adopts 8 synchronization of jacking up SPLC-4-8 control systems (U.S.'s strength utility companies product is prior art).For guaranteeing that continuous bridge system vertical deflection is controlled in the stressed standard allowed band of system, and horizontal each point relative displacement is controlled in the specification limits scope, earlier determine the displacement limit value by computer control, this engineering adopts 1mm, the opening power case, start-up system begins preliminary jacking, the top is given birth to displacement and is established 1cm, when the demonstration displacement of passing to display by displacement transducer is 1cm, system stops automatically, and by oil pump to the jack fuel cut-off, this finds us, the data that pass to pressure meter 4 by pressure sensor show, both sides, cross section jack is obviously stressed, and middle jack is in the state of not stressing substantially, we are by the controller setting for this reason, adjust the shift value of limit bearing and middle bearing, again jacking, controller is adjusted the jack displacement by control valve group and overflow valve levelling oil pump to the fuel delivery of jack, and monitor by display at any time, once indivedual jack displacements are when transfiniting, controller can be regulated by reversal valve and hydraulic control one-way valve, to the jack fuel cut-off with carry out reverse displacement, when pressure meter showed that each jack pressure is basic identical, system halt was carried out the work of next stage and is pushed up in advance, pre-top pressing force and displacement with dual are to control, and be controlled to be the master with pressure, divide three phases: for the first time, 3mm is set in displacement, but pressure must not surpass 30% of design top lift, 2 hours duration; For the second time, 2mm is set in displacement, but pressure must not surpass 60% of design top lift, 3 hours duration; For the third time, 2mm is set in displacement, but pressure must not surpass 90% of design top lift, 5 hours duration.By predetermined, determine that support and system are perfectly safe after, formal jacking, the displacement limit value is set at 1mm, in every 1cm displacement stage of total displacement, monitors by display and pressure meter at any time, and automatically adjusts by controller.Finally reach design jacking position, behind the replacing bearing,, adjust the double acting jack, jack is slowly fallen synchronously, finally reset by controller and reversal valve.
7, in the whole jacking process, be in current state on the bridge all the time, comprise tens tons coal conveyor.But any lateral displacement and length travel do not take place in integral bridge, the flexible horizontal recovery of end of the bridge is good, bearing all is in place, and is stressed even, the phenomenon of not coming to nothing, any variation does not take place in the outer shape of bridge, seam areas and stressed weak part crack etc. do not occur and damage sign, and we please detect integral bridge stress and the bearing capacity of department after to jacking and detect, almost consistent with each top index before the jacking, illustrate that integral bridge is not subjected to internal force destruction in the jacking process.Not only construction quality reaches good criteria, also retrieves a loss surplus in the of 60 ten thousand for the owner.Illustrate and do not break off a friendship this technology-continuous beam to change bearing be feasible, can guarantee construction quality well and create very big economic benefit.
Claims (10)
1, a kind of replacing supporters for continuous beam without breaking off traffic method, it is characterized in that utilizing the jacking jack and adopt multiple spot synchronization of jacking up control device to make whole continuous bridge tie up to synchronous lifting under the enough big multiple spot top lift effect, making does not vertically have amount of deflection or amount of deflection is controlled in the stressed allowed band of system, horizontal each point relative displacement is controlled in the limited field, and influence is less relatively to top lift to make under the condition of not breaking off a friendship light weight by traffic control, and old bearing spread out, more renew bearing.
2, replacing supporters for continuous beam without breaking off traffic method according to claim 1, it is characterized in that the upper and lower dowel bar that is provided with at the jacking jack, last dowel bar evenly is delivered to the weight of bridge superstructure on the jack at each fulcrum place, prevent the stressed excessive overburden operation of indivedual jack and damage, prevent that simultaneously superstructure is one-sided stressed bigger than normal and tilt or lateral displacement.
3, replacing supporters for continuous beam without breaking off traffic method according to claim 2 is characterized in that being provided with baffle structure between at the bottom of last dowel bar and the beam slab.
4, replacing supporters for continuous beam without breaking off traffic method according to claim 1 is characterized in that being provided with jack jacking support, and its structure is: basket-hanging support, telescoping column cribbing, shellfish thunder sheet trussed construction support or universal rod body steel bracket.
5, replacing supporters for continuous beam without breaking off traffic method according to claim 4, it is characterized in that telescoping column cribbing, shellfish thunder sheet trussed construction support or universal rod body steel bracket are carried out ground to be handled, except that taking conventional ground processing, the big shaped steel of bending rigidity is set carries out floor file, evenly stressed to guarantee whole ground, each fulcrum place sedimentation value is less than the displacement limit value.
6, replacing supporters for continuous beam without breaking off traffic method according to claim 4 is characterized in that described jack jacking support is set up design compressive strength and flexural strength all considers that by 2.0 safety factor the monolithic stability property coefficient is not less than 1.5.
7; replacing supporters for continuous beam without breaking off traffic method according to claim 1; it is characterized in that described multiple spot jacking control device adopts 8 synchronization of jacking up SPLC-4-8 control systems; it is mainly by hydraulic system; detecting sensor; computer control system is formed; hydraulic system is by computer control; and be provided with the synchronous shift Stroke Control; load pressure control; operation locking; promptly stop; process shows and fault alarm; automatic safety device and control circuit thereof; be equipped with the oil cylinder hydraulic control one-way valve and can prevent any type of system and pipeline decompression; thereby proof load is effectively supported; all oil cylinders can be operated simultaneously also and can operate separately; the Synchronization Control number of spots can be provided with as required, is applicable to the synchronous shift of large volume building or member.
8, replacing supporters for continuous beam without breaking off traffic method according to claim 1, it is characterized in that described traffic control is, limiting vehicle speed is in 40 kilometers, and load limit is in 80 tons, and route or travel by vehicle is limited in the position of hogging moment maximum from the cross section.
9, replacing supporters for continuous beam without breaking off traffic method according to claim 8; it is characterized in that adopting the shrinkage joint treatment measures; promptly lay hard and soft bond and carry out the power transmission power that disappears at shrinkage joint place; flexible thing works the power effect that disappears following, protects that the shrinkage joint is not hit, crimp, and rigid board is last; impact force is carried out in length and breadth to distribution; reduce the direct impact force of load, can on hard and soft bond, evenly spread shop one deck particle, play levelling, buffering, decelerating effect the shrinkage joint.
10, according to claim 1,2,3,4,5,6,7,8 or 9 described replacing supporters for continuous beam without breaking off traffic methods, it is characterized in that being provided with the fixed system that beam body steel work fixed mount or beam body steel work fixed mount and anchor line are formed, to guarantee the stability in beam body temporary fixed stage after jacking process and jacking, do not produce and safety work.
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| CNB2005100126053A CN100540809C (en) | 2005-06-14 | 2005-06-14 | The replacing supporters for continuous beam without breaking off traffic method |
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| CNB2005100126053A CN100540809C (en) | 2005-06-14 | 2005-06-14 | The replacing supporters for continuous beam without breaking off traffic method |
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| CN100540809C true CN100540809C (en) | 2009-09-16 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1903698B (en) * | 2006-08-04 | 2011-07-20 | 长江三峡通航管理局 | Multipoint synchronous lifting device and its lifting method |
| CN101343861B (en) * | 2008-08-22 | 2010-06-02 | 中铁六局集团有限公司 | Construction method for replacing old frame bridge by new frame bridge in existing railway lines |
| CN102995571B (en) * | 2012-09-05 | 2015-06-24 | 武汉二航路桥特种工程有限责任公司 | Method for prepressing single large-tonnage temporary steel pipe support and then resisting beam bottom during dismantling bridge beam body, and device thereof |
| CN103741603B (en) * | 2013-12-26 | 2016-01-20 | 武汉二航路桥特种工程有限责任公司 | The large height of bridge raise after gapless to fall beam method and adjustable height device thereof |
| CN104018434B (en) * | 2014-06-20 | 2016-03-30 | 丰泽工程橡胶科技开发股份有限公司 | The replacing options of architectural vibration-insulation rubber supporting seat |
| CN105297643B (en) * | 2015-11-20 | 2016-11-30 | 湖南城市学院 | Hollow slab type Bridge Support Replacement method |
| CN106758874A (en) * | 2016-12-14 | 2017-05-31 | 湖南城市学院 | The processing method of combined type beam bridge seat and application |
| CN107142855A (en) * | 2017-05-17 | 2017-09-08 | 广州市精特建筑工程有限公司 | Bridge single pier bearing replacement, maintenance jacking anchor ear |
| CN108457206B (en) * | 2018-03-13 | 2019-07-05 | 河南省光大路桥工程有限公司 | A kind of smart bridge fixed system based on vehicle Flow Detection |
| CN108442260B (en) * | 2018-03-26 | 2019-03-22 | 中交路桥建设有限公司 | Construction technology for large heavy girder bearing replacement |
| CN112144406A (en) * | 2020-09-15 | 2020-12-29 | 中国电建市政建设集团有限公司 | Construction method for replacing support by integrally and synchronously jacking bridge |
| CN114250721B (en) * | 2021-12-30 | 2023-10-20 | 中铁二十二局集团第三工程有限公司 | Construction method for jacking broken engineering column |
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2005
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