CN100582373C - Jacking force-adjustable prestressed resilient support structure and construction method thereof - Google Patents
Jacking force-adjustable prestressed resilient support structure and construction method thereof Download PDFInfo
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- CN100582373C CN100582373C CN200810069702A CN200810069702A CN100582373C CN 100582373 C CN100582373 C CN 100582373C CN 200810069702 A CN200810069702 A CN 200810069702A CN 200810069702 A CN200810069702 A CN 200810069702A CN 100582373 C CN100582373 C CN 100582373C
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Abstract
A prestressing force elastic support structure convenient for regulating the prestressing force, is characterized in that a rigidization strip is casted at the bridge bearing point position to be reinforced, and a support pier stud is casted beneath the rigidization strip; the rigidization strip is in fixed connection with the support pier stud through a prestressing force elastic steel bearing; two spring steel sheets have a certain radian and the arc tops are relative to each other, which are arranged between the upper steel plate and the lower steel plate, the spring steel sheets and the common edge of the upper steel plate and the lower steel plate are welded and fastened on a locating steel plate, the upper steel plate and the lower steel plate are connected through a long bolt, a prestressing force is added to the spring steel sheet as a deformation margin, thereby the object of regulating the prestressing force can be achieved by adjusting the bolt. The invention has beneficial technique effects of simple construction, reliable structure and adjustable prestressing force.
Description
Technical field
The present invention relates to a kind of Technology Bridge Strengthening, relate in particular to a kind of prestressing force elastic support structure and job practices thereof of being convenient to regulate pre-jacking force.
Background technology
Bridge is being brought into play very important effect as the important component part of main artey of communications in national economic development and social development.Health with the people is the same, bridge also the time regular meeting pathology takes place, take rational reinforcement means to renovate to it, seem important unusually; Set up the bracing reinforcement bridge,, thereby the bearing capacity of full-bridge is improved, become important a kind of reinforcement means with the stress system of change structure; And one of key technology of this reinforcement means to be exactly correct the processing support and the contacting of former bridge, to reach the reinforcing purpose, protect people's the security of the lives and property.
At present processing set up support with problem that reinforcement bridge contact on, mainly contain two kinds of methods: the one, the restriction vehicle pass-through cuts deck paving, alleviates the dead load effect, sets up support again, does bridge deck again, thus the realization support contacts with the tight of former bridge; The 2nd, the restriction vehicle pass-through by applying the method for jack synchronously, is placed the bearing between support and former bridge; And these two kinds of methods all are cumbersome in construction, and bigger with the environmental concerns in season of construction, and reaction of bearing is difficult to control, and new disease appears in former bridge easily.
Summary of the invention
The invention discloses a kind of prestressing force elastic support structure of being convenient to regulate pre-jacking force, it comprises: at bridge supporting point position to be reinforced, built firmization band, built the support pier stud below firmization band; Firmization band is fixedlyed connected by prestressing force Elastic Steel bearing with supporting between the pier stud.
Be provided with the π shaped steel muscle and first pre-embedded steel slab in the described firmization band, the lower end of π shaped steel muscle is welded on described first pre-embedded steel slab; Be provided with the inverted π shaped steel muscle and second pre-embedded steel slab in the described support pier stud, the upper end of inverted π shaped steel muscle is welded on described second pre-embedded steel slab.
Described prestressing force Elastic Steel bearing comprises: upper steel plate, lower steel plate, steel spring plate and fixing steel plate, and wherein steel spring plate has two, and two steel spring plates become certain radian and arc top relatively, place between upper steel plate, lower steel plate; The common edge of steel spring plate and upper steel plate, lower steel plate all is weldingly fixed on the fixing steel plate; Bolt hole is in correspondence with each other all arranged on upper steel plate and the lower steel plate, connect by stay bolt between bolt hole; Prestressing force Elastic Steel bearing is added with prestressing force in advance as the distortion storage level; This prestressing force Elastic Steel bearing section becomes hourglass shape.
Closely be connected by laminated rubber bearing between first pre-embedded steel slab in the described firmization band and the upper steel plate of prestressing force Elastic Steel bearing; Second pre-embedded steel slab in the described support pier stud and the welding of the lower steel plate of prestressing force Elastic Steel bearing are fixing.
The above-mentioned job practices of being convenient to regulate the prestressing force elastic support structure of pre-jacking force, its step is as follows:
1) treats the bridge supporting point position of reinforcement bridge, adopting expansive concrete to build firmization band and support pier stud;
2) make laminated rubber bearing and prestressing force Elastic Steel bearing, prestressing force Elastic Steel bearing is applied prestressing force;
3) laminated rubber bearing and prestressing force Elastic Steel bearing are installed, are discharged prestressing;
4) rectification and maintenance prestressing force elastic support structure.
When building firmization band, the pre-buried π shaped steel muscle and first pre-embedded steel slab are with π shaped steel muscle and the welding of first pre-embedded steel slab; Support building with building simultaneously of firmization band of pier stud and carry out, build support pier basis and pier stud, at the pre-buried inverted π shaped steel muscle of design attitude and second pre-embedded steel slab and with the two welding, it is parallel with the support pier column section just to have changed zone face;
Step 2) in, arc spring steel plate, fixing steel plate, upper steel plate, lower steel plate, the stay bolt produced by designing requirement are installed and fixed, be made into prestressing force Elastic Steel bearing, tighten stay bolt; With loading equipemtn prestressing force Elastic Steel bearing is applied compressive pre-stress; Record " power～deformation " closes coefficient value, on request prestressing force Elastic Steel bearing is demarcated.
In the step 3), lay prestressing force Elastic Steel bearing in supporting on the pier stud, with the lower steel plate and second pre-embedded steel slab welding of supporting in the pier stud of prestressing force Elastic Steel bearing; Place laminated rubber bearing between the upper steel plate of prestressing force Elastic Steel bearing and first pre-embedded steel slab in the firmization band, the line position of going forward side by side is proofreaied and correct; Loosen the stay bolt of prestressing force Elastic Steel bearing, discharge prestressing step by step, the variation of monitoring bridge construction internal force makes upper steel plate resilience counter-force in laminated rubber bearing, closely be connected by laminated rubber bearing between first pre-embedded steel slab in the firmization band and the prestressing force Elastic Steel bearing, form integral body.
In the step 4), treat that concrete meets the requirements of intensity, adjust stay bolt, readjust reinforcement bridge internal force; Then, adopt bamboo offset plate and concrete that the prestressing force elastic support structure is isolated from the outside, prestressing force Elastic Steel bearing is protected.
Useful technique effect of the present invention is: construction is simple, reliable in structure.Can make bridge construction internal force reach optimization by adjusting the predeformation amount of prestressing force resiliency supported, effectively, power transmission smoothly.。
Description of drawings
Fig. 1, prestressing force elastic support structure schematic diagram;
Fig. 2, prestressing force Elastic Steel seat structure schematic diagram;
Fig. 3, prestressing force elastic support structure embodiment figure;
In the accompanying drawing: firmization is with 1, prestressing force Elastic Steel bearing 2, upper steel plate 2-1, lower steel plate 2-2, steel spring plate 2-3, fixing steel plate 2-4, stay bolt 2-5, support pier stud 3, pre-embedded steel slab 4, laminated rubber bearing 5, π shaped steel muscle 6, bamboo offset plate 7.
The specific embodiment
At aforementioned problems of the prior art, the present invention proposes a kind of prestressing force elastic support structure of being convenient to regulate pre-jacking force, comprise referring to accompanying drawing 1 this structure: at bridge supporting point position to be reinforced, built firmization and be with 1, below firmization is with 1, built and supported pier stud 3; Firmization is with 1 to fixedly connected by prestressing force Elastic Steel bearing 2 with supporting between the pier stud 3.
Prestressing force Elastic Steel bearing 2 structures that wherein play regulating action are: it comprises upper steel plate 2-1, lower steel plate 22, steel spring plate 2-3 and fixing steel plate 2-4, wherein steel spring plate 2-3 has two, two steel spring plate 2-3 become certain radian and arc top relatively, place 2-2 between upper steel plate 2-1, lower steel plate; The common edge of steel spring plate 2-3 and upper steel plate 2-1, lower steel plate 2-2 all is weldingly fixed on the fixing steel plate 2-4; Bolt hole is in correspondence with each other all arranged on upper steel plate 2-1 and the lower steel plate 22, connect by stay bolt 2-5 between bolt hole; Prestressing force Elastic Steel bearing 2 is added with prestressing force in advance as the distortion storage level; These prestressing force Elastic Steel bearing 2 sections become hourglass shape.
Described firmization is used to connect bridge supporting point position to be reinforced and prestressing force Elastic Steel bearing 2 with 1, and firmization is with and is provided with the π shaped steel muscle 6 and first pre-embedded steel slab 4 in 1, and the lower end of π shaped steel muscle 6 is welded on described first pre-embedded steel slab 4;
Be provided with the inverted π shaped steel muscle 6 and second pre-embedded steel slab 4 in the described support pier stud 3, the upper end of inverted π shaped steel muscle 6 is welded on described second pre-embedded steel slab 4.
Firmization with 1, prestressing force Elastic Steel bearing 2, support that concrete annexation is between pier stud 3 threes: closely is connected by laminated rubber bearing 5 between the upper steel plate 2-1 of firmization with first pre-embedded steel slab 4 in 1 and prestressing force Elastic Steel bearing 2, second pre-embedded steel slabs 4 that support pier stud 3 is interior and the lower steel plate 2-2 of prestressing force Elastic Steel bearing 2 weld and fix.
Embodiment:
Referring to accompanying drawing 3, be the example explanation job practices of being convenient to regulate the prestressing force elastic support structure of pre-jacking force of the present invention with smooth arch bridge.
1) firmization is with 1 and support building of pier stud 3: at first at the supporting point position of reinforcement bridge, adopt expansive concrete to build firmization and be with 1, with this bonding that strengthens new and old material, structure, guarantee that interstructural coordination is stressed; Be with 1 o'clock building firmization, the pre-buried π shaped steel muscle 6 and first pre-embedded steel slab 4, and the π shaped steel muscle 6 and first pre-embedded steel slab 4 welded together, form power transmission layer and permanent position end; Begin to build basis and the pier stud that supports pier stud 3 simultaneously, the pre-buried inverted π shaped steel muscle 6 of design attitude and second pre-embedded steel slab 4 in supporting pier stud 3, and the inverted π shaped steel muscle 6 and second pre-embedded steel slab 4 welded together (noticing that firmization is parallel with support pier stud 3 cross sections with 1 surface).
Treat the determining of supporting point position of reinforcement bridge, be disease situation and loading characteristic according to bridge construction, equation of the influence line by the serious relatively cross section of finite element analysis software match disease of the prior art, separate it and influence line composite equation group, the definite strong point zone that can improve the bridge force-bearing condition, in conjunction with bisection method mathematical thought and finite element analysis computation, determine the accurate Support Position of prestressing force elastic support structure then; Again according to smooth arch bridge stress characteristic, select braced structures pier stud and the angled supporting form of horizon, with to improving the best control principle of bridge force-bearing condition, in conjunction with finite element analysis, select relatively reasonable support pier stud position and and horizon between angle.
2) when carrying out step 1), make laminated rubber bearing 5 and prestressing force Elastic Steel bearing 2: at first choose satisfactory high-strength, high elastoplasticity, high fatigue life spring steel material, according to designing requirement cutting certain size, produce arc spring steel plate 2-3, upper steel plate 2-1, lower steel plate 2-2 (and drilling through bolt hole), fixing steel plate 2-4.Referring to accompanying drawing 2, it is welded, install and tighten stay bolt 2-5; Then the prestressing force Elastic Steel bearing of making 2 is applied precompression, record power one deformation relationship numerical value, fixed length bolt 2-5 as the sex change storage level, and demarcates this bearing on request.To guarantee that the prestressing force elastic support structure contacts with the tight of reinforcement bridge, effectively, power transmission smoothly.
3) installation of laminated rubber bearing 5 and prestress steel elastic support 2: lay Elastic Steel bearing 2 in supporting on the pier stud 3, lower steel plate 2-2 and 4 welding of second pre-embedded steel slab with prestress steel elastic support 2, upper steel plate 2-1 and firmization are with 4 placements of first pre-embedded steel slab laminated rubber bearing 5 in 1, and the line position of going forward side by side is proofreaied and correct; Loosen prestress steel elastic support 2 fixed length bolt 2-5, discharge prestressing step by step, and the variation of monitoring bridge construction internal force, make bridge construction internal force reach optimization, it is stressed jointly that prestressing force elastic support structure and reinforcement bridge are participated in.
4) the prestressing force elastic support structure is corrected and maintenance: treat that concrete strength acquires a certain degree, adjust fixed length bolt 2-5, readjust reinforcement bridge internal force, make to meet the reinforcing requirement; Then, adopt bamboo offset plate 7 and concrete that prestress steel elastic support 2 is isolated from the outside, it is protected.
The prestressing force elastic support structure that adopts the inventive method to set up can be realized tight the contact with reinforcement bridge, effectively, power transmission smoothly.And can make bridge construction internal force reach optimization by adjusting the predeformation amount of prestressing force resiliency supported.Difficulty of construction, the trouble degree of setting up the bracing reinforcement bridge have also been reduced.
Claims (7)
1, a kind of prestressing force elastic support structure of being convenient to regulate pre-jacking force is characterized in that: at bridge supporting point position to be reinforced, built firmization band (1), built support pier stud (3) in firmization band (1) below; Firmization band (1) is fixedlyed connected by prestressing force Elastic Steel bearing (2) with supporting between the pier stud (3),
Described prestressing force Elastic Steel bearing (2) comprising: upper steel plate (2-1), lower steel plate (2-2), steel spring plate (2-3) and fixing steel plate (2-4), wherein steel spring plate (2-3) has two, two steel spring plates (2-3) become certain radian and arc top relatively, place between upper steel plate (2-1), lower steel plate (2-2); Steel spring plate (2-3) all is weldingly fixed on the fixing steel plate (2-4) with the common edge of upper steel plate (2-1), lower steel plate (2-2); Bolt hole is in correspondence with each other all arranged on upper steel plate (2-1) and the lower steel plate (2-2), connect by stay bolt (2-5) between bolt hole; Prestressing force Elastic Steel bearing (2) is added with prestressing force in advance as the distortion storage level; This prestressing force Elastic Steel bearing (2) section becomes hourglass shape,
Closely be connected by laminated rubber bearing (5) between first pre-embedded steel slab (4) in the described firmization band (1) and the upper steel plate (2-1) of prestressing force Elastic Steel bearing (2); Second pre-embedded steel slab (4) in the described support pier stud (3) is fixing with the welding of the lower steel plate (2-2) of prestressing force Elastic Steel bearing (2).
2, a kind of prestressing force elastic support structure of being convenient to regulate pre-jacking force according to claim 1, it is characterized in that: be provided with π shaped steel muscle (6) and first pre-embedded steel slab (4) in the described firmization band (1), the lower end of π shaped steel muscle (6) is welded on described first pre-embedded steel slab (4); Be provided with inverted π shaped steel muscle (6) and second pre-embedded steel slab (4) in the described support pier stud (3), the upper end of inverted π shaped steel muscle (6) is welded on described second pre-embedded steel slab (4).
3, a kind of job practices of being convenient to regulate the prestressing force elastic support structure of pre-jacking force, it is characterized in that: its step is as follows:
1) treats the bridge supporting point position of reinforcement bridge, adopting expansive concrete to build firmization band (1) and support pier stud (3);
2) make laminated rubber bearing (5) and prestressing force Elastic Steel bearing (2), prestressing force Elastic Steel bearing (2) is applied prestressing force;
3) laminated rubber bearing (5) and prestressing force Elastic Steel bearing (2) are installed, are discharged prestressing;
4) rectification and maintenance prestressing force elastic support structure.
4, the job practices of being convenient to regulate the prestressing force elastic support structure of pre-jacking force according to claim 3, it is characterized in that: when building firmization band (1), pre-buried π shaped steel muscle (6) and first pre-embedded steel slab (4) are with π shaped steel muscle (6) and first pre-embedded steel slab (4) welding; Supporting building with building simultaneously of firmization band (1) of pier stud (3) carries out, build support pier basis and pier stud, at the pre-buried inverted π shaped steel muscle of design attitude (6) and second pre-embedded steel slab (4) and with the two welding, it is parallel with support pier stud (3) cross section just to have changed band (1) surface;
5, the job practices of being convenient to regulate the prestressing force elastic support structure of pre-jacking force according to claim 3, it is characterized in that: step 2) in, the arc spring steel plate of producing by designing requirement (2-3), fixing steel plate (2-4), upper steel plate (2-1), lower steel plate (2-2), stay bolt (2-5) are installed and fixed, be made into prestressing force Elastic Steel bearing (2), tighten stay bolt (2-5); With loading equipemtn prestressing force Elastic Steel bearing (2) is applied compressive pre-stress; Record " power～deformation " closes coefficient value, on request prestressing force Elastic Steel bearing (2) is demarcated.
6, the job practices of being convenient to regulate the prestressing force elastic support structure of pre-jacking force according to claim 3, it is characterized in that: in the step 3), lay prestressing force Elastic Steel bearing (2) in supporting on the pier stud (3), with the lower steel plate (2-2) and second pre-embedded steel slab (4) welding of supporting in the pier stud (3) of prestressing force Elastic Steel bearing (2); Place laminated rubber bearing (5) between the upper steel plate (2-1) of prestressing force Elastic Steel bearing (2) and first pre-embedded steel slab (4) in the firmization band (1), the line position of going forward side by side is proofreaied and correct; Loosen the stay bolt (2-5) of prestressing force Elastic Steel bearing (2), discharge prestressing step by step, the variation of monitoring bridge construction internal force, make upper steel plate (2-1) resilience counter-force in laminated rubber bearing (5), closely be connected formation integral body by laminated rubber bearing (5) between first pre-embedded steel slab (4) in the firmization band (1) and the prestressing force Elastic Steel bearing (2).
7, the job practices of being convenient to regulate the prestressing force elastic support structure of pre-jacking force according to claim 3 is characterized in that: in the step 4), treat that concrete meets the requirements of intensity, adjust stay bolt (2-5), readjust reinforcement bridge internal force; Then, adopt bamboo offset plate (7) and concrete that the prestressing force elastic support structure is isolated from the outside, prestressing force Elastic Steel bearing (2) is protected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810069702A CN100582373C (en) | 2008-05-20 | 2008-05-20 | Jacking force-adjustable prestressed resilient support structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810069702A CN100582373C (en) | 2008-05-20 | 2008-05-20 | Jacking force-adjustable prestressed resilient support structure and construction method thereof |
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| CN101275386A CN101275386A (en) | 2008-10-01 |
| CN100582373C true CN100582373C (en) | 2010-01-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102140778B (en) * | 2010-02-02 | 2012-11-07 | 同济大学 | Spherical wireless real-time monitoring steel support for bridge |
| CN102425113B (en) * | 2011-12-05 | 2013-07-31 | 中国建筑第六工程局有限公司 | Horizontal pre-jacking force application method for 1,000t pagoda-type concrete bridge tower |
| CN105438590B (en) * | 2015-06-25 | 2018-01-30 | 新兴重工湖北三六一一机械有限公司 | A kind of supporting and regulating device for correcting box deformation |
| CN112681121B (en) * | 2020-12-18 | 2022-05-10 | 河海大学 | Elastic connecting device for controlling longitudinal deformation of multi-span long-connection-curve continuous rigid frame bridge |
| CN113529949B (en) * | 2021-08-23 | 2023-07-11 | 沈阳建筑大学 | Visual beam and beam self-resetting anti-seismic steel structure node connecting device |
| CN115726239B (en) * | 2022-12-09 | 2023-07-21 | 广东众强建设工程有限公司 | Prestressed pavement and construction method thereof |
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