CN104631310A - Bridge vibration reducing and isolating support with adjustable bearing capacity - Google Patents
Bridge vibration reducing and isolating support with adjustable bearing capacity Download PDFInfo
- Publication number
- CN104631310A CN104631310A CN201510062931.9A CN201510062931A CN104631310A CN 104631310 A CN104631310 A CN 104631310A CN 201510062931 A CN201510062931 A CN 201510062931A CN 104631310 A CN104631310 A CN 104631310A
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- China
- Prior art keywords
- plate
- bearing capacity
- bearing
- pelvic cavity
- steel liner
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/048—Bearings being adjustable once installed; Bearings used in incremental launching
Abstract
The invention relates to the technical field of bridge supports, in particular to a bridge vibration reducing and isolating support with an adjustable bearing capacity. The bridge reducing and isolating support structurally comprises a lower support plate with a basin cavity. A bridge vibration reducing and isolating structure composed of an upper support plate, a spherical crown plate and a middle steel linear plate is arranged in the basin cavity of the lower support plate. At least one hydraulic hole communicated with the basin cavity is formed in the lower support plate or the middle steel linear plate. According to the bridge vibration reducing and isolating support with the adjustable bearing capacity, the actual bearing capacity of the support can be adjusted by adjusting the height of the support.
Description
Technical field
The invention belongs to technical field of bridge, namely relate to a kind of adjustable bridge vibration absorption and isolation support of bearing capacity that can adjust its height.
Background technology
Along with the fast development of China's economic construction, with speedway for the high-grade highway of representative emerge rapidly in large numbersBamboo shoots after a spring rain as appearance, bridge construction as highway construction important component part also obtains corresponding development, there is the continuous bridge of Long span in a large amount of leap great rivers (river), straits (gulf), viaduct, curved bridge.The continuous beam system of statically-indeterminate structure can reduce the absolute value of moment of flexure within span, reduce main depth of beam, thus can reduce material usage and dead load, and deadweight reduces there is the endogenetic process that reduce further and produced by dead load.Continuous beam is widely applied with its superior function, but have ignored the error of actual conditions and Theoretical Design.Continuous girder bridge belongs to statically-indeterminate structure, containing more superfluous constraint, simultaneously because concrete shrinkage and creep, pier differential settlement, section temperature difference change, prestressing force produce more additional internal force, to the stressed generation considerable influence of beam body, statically indeterminate beam bearing capacity and internal stress accurately can not be solved, bridge research maintenance is affected greatly.
When bridge design calculates to the dynamic analysis of beam body, kinematics analysis all based on the confirmation of bearing vertical load, be the confirmation that the calculating of other parameters such as rigidity, damping all will rely on bearing capacity, consumption, the type selecting of subsequent material all will according to these result of calculations.And continuous beam is as a statically-indeterminate structure form, its stressing conditions is also comparatively complicated, is all generally to make figure, the formula such as stressed, moment of flexure, the internal stress of continuous beam according to each bearing bearing capacity.Be a three-span continuous beam schematic diagram as shown in Figure 1, four pier R are respectively arranged with bearing A, B, C, D, and become to support to beam body H-shaped, when static load, gravity system is equivalent to even load distribution, each Bearing Seat Force equalization (as shown in Figure 2); Form the moment of flexure of above-mentioned bridge as shown in Figure 3, now each pier bearing bearing capacity is identical with design.Change and different design is there is when can cause each Bearing Seat Force due to the differential settlement of ground, concrete shrinkage and creep, prestressed effect, variations in temperature etc., multiple stressing conditions may be there is---as shown in Figure 4, when sedimentation occurs pier B, bearing bearing capacity reduces herein, other bearing bearing capacities then can correspondingly increase, beam body no longer bears even load, there is deviation (as shown in Figure 5) in the now stressed increase of pier A, C, D and design load, the stressed of bearing C may exceed design limit; And corresponding safety measure is all according to Theoretical Design, there is potential safety hazard equally, will cause having a strong impact on bridge.Due to the hogging moment effect at pier B, C place during Theoretical Design, use the corresponding minimizing of material, but now pier C place moment of flexure increases, and reality does not increase respective material, cause beam body intensity to reduce, finally directly affect the application life of bridge, even life property safety.
No matter how accurate Theoretical Design be, man's activity in practice of construction, measure impact, sequence of construction impact etc. all can cause many uncertain factors, add the differential settlement in base, concrete shrinkage and creep, prestressing force effect, the change of temperature, actual condition and theory calculate is finally caused to occur relatively large deviation, and designer is difficult to determine concrete departure, when extreme, even coming to nothing appears in some bearing, if at this moment still carry out follow-up construction according to design data, maintenance, safeguard, change, finally likely significant impact is caused to bridge security.Especially, under earthquake operating mode, the actual pressure-bearing value of bearing and the huge deviation of design load, likely make to subtract shock insulation calculating and do not meet actual condition completely, occur Damage Assessment for Bridge.Present stage effectively cannot measure actual Bearing Seat Force situation, cannot determine deviation size that is actual and Theoretical Design.
Summary of the invention
Object of the present invention is just to provide a kind of by adjusting the adjustable bridge vibration absorption and isolation support of bearing capacity that it highly realizes the bearing capacity adjusting bearing.
Realize above-mentioned purpose of the present invention, the technical scheme adopted is:
The adjustable bridge vibration absorption and isolation support of a kind of bearing capacity, its structure comprises the lower support plate being provided with pelvic cavity, is formed seismic isolation and reduction structure be arranged in the pelvic cavity of described lower support plate by upper bracket plate, spherical crown plate, middle steel liner plate; It is characterized in that: in described lower support plate or middle steel liner plate, be provided with the hydraulic pressure hole of at least one be communicated with described pelvic cavity.
The additional technical feature forming the adjustable bridge vibration absorption and isolation support of above-mentioned bearing capacity also comprises:
---on the described lower middle steel liner plate corresponding with described hydraulic pressure hole or support plate, be provided with annular groove;
---on the sidewall of described middle steel liner plate and described pelvic cavity, be provided with joint ring.
The adjustable bridge vibration absorption and isolation support of a kind of bearing capacity, its structure comprises upper bracket plate and forms seismic isolation and reduction structure by steel liner plate, spherical crown plate, lower support plate, and described upper bracket plate is arranged in the pelvic cavity of steel liner plate; It is characterized in that: on described upper bracket plate or steel liner plate, be provided with at least one the hydraulic pressure hole be communicated with described pelvic cavity.
The additional technical feature forming the adjustable bridge vibration absorption and isolation support of above-mentioned bearing capacity also comprises:
---on the described steel liner plate corresponding with described hydraulic pressure hole or upper bracket plate, be provided with annular groove;
---on the sidewall of described steel liner plate and described pelvic cavity, be provided with joint ring.
A kind of bearing capacity provided by the present invention is adjustable bridge vibration absorption and isolation support compared with prior art, has the following advantages: this bearing adds the function heightening force adjustment on the basis of existing vibration absorption and isolation support.The function of vibration absorption and isolation support can not only be played, stepless changing can be carried out to bearing simultaneously, make heighten adjustment accordingly, so that the bearing that balanced adjustment pier is arranged respectively is to the beam bodily form uniformly load diatibution by effective measuring and calculating of measuring and calculating bearing bearing capacity size.
Accompanying drawing explanation
Fig. 1 is prior art bridge construction schematic diagram;
Fig. 2 is the bearing capacity of bridge pad shown in Fig. 1 schematic diagram;
The moment of flexure schematic diagram that Fig. 3 is bridge shown in Fig. 1;
Fig. 4 is pier sedimentation support bearing capacity schematic diagram corresponding to the B of bridge pad shown in Fig. 1;
The moment of flexure schematic diagram that Fig. 5 is bridge shown in Fig. 4;
Fig. 6 is bridge pad structural representation provided by the invention;
Fig. 7 is the second bridge pad structural representation provided by the invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the structure of the adjustable bridge vibration absorption and isolation support of bearing capacity provided by the present invention and use principle are described in further detail:
Be illustrated in figure 6 the cross section structure schematic diagram of the adjustable bridge vibration absorption and isolation support of one side bearing capacity provided by the invention.The structure forming this bearing comprises the lower support plate 2 being provided with pelvic cavity 1, formed seismic isolation and reduction structure be arranged in the pelvic cavity of lower support plate by upper bracket plate 3, spherical crown plate 4, middle steel liner plate 5, above-mentioned lower support plate is provided be communicated with pelvic cavity be provided with this plug wire of plug wire 6(and can set as required) hydraulic pressure hole 7; The sidewall of middle steel liner plate and pelvic cavity is provided with joint ring 8, makes pelvic cavity inside form confined space.
During use, injecting is heightened to the filling of pelvic cavity inside by hydraulic pressure hole, and by sealing ring, filler is limited in pelvic cavity inside, by external digital display manometer, bearing capacity size suffered by bearing can be calculated according to formula, noly actual requirement can be met to determine that bearing is known, ensure that vibration absorption and isolation support can effectively play a role, by increasing filling pressure, the most at last lifting of holder top structure, bearing actual loading is met design requirement, ensure that actual conditions are consistent with design.The function of existing vibration absorption and isolation support is promoted further, under the prerequisite not affecting damping and isolation effect, adds stepless changing function.The height of support that construction error or pier sedimentation can be avoided to cause not, bias voltage, the problem such as to come to nothing.Can be used for monitoring Bearing Seat Force situation, simultaneously convenient to use, save a large amount of manpower, financial resources, ensure the use safety of bridge.
In the structure forming the adjustable bridge vibration absorption and isolation support of above-mentioned bearing capacity,
---the middle steel liner plate 5 corresponding with hydraulic pressure hole is provided with annular groove 9, can effectively avoid when heightening injecting 10 to the filling of pelvic cavity inside, because of not heart position and cause heightening auxiliary agent and push up partially by middle steel liner plate 5 wherein, hydraulic pressure hole 7, cause the generation of its problem that is shifted;
---in the structure of the adjustable bridge vibration absorption and isolation support of this bearing capacity, hydraulic pressure hole for heightening from injecting to the filling of pelvic cavity inside is arranged on middle steel liner plate 5, and is provided with in the lower support plate that this hydraulic pressure hole is corresponding and heightens auxiliary agent by annular groove inclined for bearing top for preventing equally.This structure can reach the object of the invention equally;
---repeatedly heighten adjustment in order to what realize the adjustable bridge vibration absorption and isolation support of bearing capacity, a hydraulic pressure hole 7 is difficult to meet the demands, and therefore can arrange two, three or more hydraulic pressure hole in lower support plate (or middle steel liner plate 5) simultaneously.
Be illustrated in figure 7 the cross section structure schematic diagram of the adjustable bridge vibration absorption and isolation support of the second one side bearing capacity provided by the invention.The structure forming this bearing comprises the upper bracket plate 3 being provided with pelvic cavity 1, forming seismic isolation and reduction structure by middle steel liner plate 5, spherical crown plate 4 and lower support plate 2 is arranged in the pelvic cavity of upper bracket plate, and above-mentioned middle steel liner plate is provided with the hydraulic pressure hole 7 being provided with plug wire 6 be communicated with pelvic cavity; The sidewall of middle steel liner plate and pelvic cavity is provided with joint ring 8, makes pelvic cavity inside form confined space.
During use, injecting is heightened to the filling of pelvic cavity inside by hydraulic pressure hole, and by sealing ring, filler is limited in pelvic cavity inside, by external digital display manometer, bearing capacity size suffered by bearing can be calculated according to formula, noly actual requirement can be met to determine that bearing is known, ensure that vibration absorption and isolation support can effectively play a role, by increasing filling pressure, the most at last lifting of holder top structure, bearing actual loading is met design requirement, ensure that actual conditions are consistent with design.
Equally, in the structure forming the adjustable bridge vibration absorption and isolation support of above-mentioned bearing capacity,
---on the upper bracket plate corresponding with hydraulic pressure hole, be provided with annular groove 9, can effectively avoid when heightening injecting 10 to the filling of pelvic cavity inside, because of not heart position and cause heightening auxiliary agent and push up partially by middle steel liner plate 5 wherein, hydraulic pressure hole 7, cause the generation of its problem that is shifted;
---in the structure of the adjustable bridge vibration absorption and isolation support of this bearing capacity, hydraulic pressure hole for heightening from injecting to the filling of pelvic cavity inside is arranged on upper bracket plate 3, and is provided with on the middle steel liner plate 5 that this hydraulic pressure hole is corresponding and heightens auxiliary agent by annular groove inclined for bearing top for preventing equally.This structure can reach the object of the invention equally; Two, three or more hydraulic pressure hole can be set simultaneously on upper bracket plate (or middle steel liner plate 5) equally, so as to realize the adjustable bridge vibration absorption and isolation support of bearing capacity repeatedly heighten adjustment.
When after above-mentioned vibration absorption and isolation support installation, need to adjust height of support, or during adjustment Bearing Seat Force situation.Only lower support plate plug need be taken out, then pour in hydraulic pressure hole with special tool and heighten the adjustment that injecting carries out bearing vertical bearing capacity.When occurring coming to nothing, in hydraulic pressure hole, continue perfusion liquid state heighten injecting, namely calculate bearing bearing capacity size by external pressure meter, and by bearing lifting, can will heighten injecting solidification bearing can be made to be stabilized in desired level height after bearing reaches desired level height or bearing capacity.When pier generation sedimentation causes height of support inadequate, coming to nothing appears in portion of standoff, another part bearing bearing capacity exceeds design standard, now by heightening injecting to bearing perfusion, bearing actual carrying capacity size can be calculated, and by making bearing bearing capacity meet design requirement to the lifting of bearing.When multiple Bearing Seat Force is uneven, uniform pressure can be set bearing is adjusted, ensure each bearing uniform stressed.Ensure that beam body is steadily stressed, make continuous beam deformation curve under load action level and smooth, the impact of vehicle can be effectively reduced.Make intermediate support place occur hogging moment by adjustment bearing bearing capacity, can effectively reduce Maximum bending moment than corresponding multispan simply supported beam, materials are saved more.Can accurately solve each several part internal stress size by application standard equation.Bridge is facilitated to study and later maintenance measurement.
Force adjustment vibration absorption and isolation support is heightened by using, effectively can calculate bearing actual loading situation, determine deviation that is actual and theory, redesign can be carried out according to actual conditions to calculate, also can rely on simultaneously and heighten force adjustment bearing itself, change actual loading situation, bearing can be relied on completely to be gross data by its force bearing adjustment, eliminate the heavy engineering recalculated, ensure that uniformity that is actual and design.Any bearing before this does not all have this kind of function, it is a simple link structure, and heightens force adjustment vibration absorption and isolation support and take the lead in this has been exploration, can effective supported design parameter, ensure that real data is consistent with design calculation, ensure that the normal use of bridge.
Claims (6)
1. the adjustable bridge vibration absorption and isolation support of bearing capacity, its structure comprises the lower support plate being provided with pelvic cavity, is formed seismic isolation and reduction structure be arranged in the pelvic cavity of described lower support plate by upper bracket plate, spherical crown plate, middle steel liner plate; It is characterized in that: in described lower support plate or middle steel liner plate, be provided with at least one the hydraulic pressure hole be communicated with described pelvic cavity.
2. the adjustable bridge vibration absorption and isolation support of a kind of bearing capacity according to claim 1, is characterized in that: in the described middle steel liner plate corresponding with described hydraulic pressure hole or support plate pelvic cavity, be provided with the hydraulic pressure hole communicated with the external world be provided with annular groove.
3. the adjustable bridge vibration absorption and isolation support of a kind of bearing capacity according to claim 1, is characterized in that: on the sidewall of described middle steel liner plate and described pelvic cavity, be provided with joint ring.
4. the adjustable bridge vibration absorption and isolation support of bearing capacity, its structure comprises upper bracket plate and forms seismic isolation and reduction structure by steel liner plate, spherical crown plate, lower support plate, and described upper bracket plate is arranged in the pelvic cavity of steel liner plate; It is characterized in that: on described upper bracket plate or steel liner plate, be provided with at least one the hydraulic pressure hole be communicated with described pelvic cavity.
5. the adjustable bridge vibration absorption and isolation support of a kind of bearing capacity according to claim 3, is characterized in that: on the described steel liner plate corresponding with described hydraulic pressure hole or upper bracket plate, be provided with annular groove.
6. the adjustable bridge vibration absorption and isolation support of a kind of bearing capacity according to claim 3, is characterized in that: on the sidewall of described steel liner plate and described pelvic cavity, be provided with joint ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510062931.9A CN104631310A (en) | 2015-02-06 | 2015-02-06 | Bridge vibration reducing and isolating support with adjustable bearing capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510062931.9A CN104631310A (en) | 2015-02-06 | 2015-02-06 | Bridge vibration reducing and isolating support with adjustable bearing capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104631310A true CN104631310A (en) | 2015-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510062931.9A Pending CN104631310A (en) | 2015-02-06 | 2015-02-06 | Bridge vibration reducing and isolating support with adjustable bearing capacity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105625168A (en) * | 2016-03-15 | 2016-06-01 | 衡水中交信德工程橡塑有限公司 | Pot type rubber bearing for measuring force and adjusting height |
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| CN202559239U (en) * | 2012-05-22 | 2012-11-28 | 衡水中盛工程橡胶有限公司 | Anti-drop adjustable height ball support |
| CN203200651U (en) * | 2013-05-09 | 2013-09-18 | 衡水宝力工程橡胶有限公司 | Height-adjustable draw-resistant support |
| CN204475154U (en) * | 2015-02-06 | 2015-07-15 | 衡水中交信德工程橡塑有限公司 | Bearing capacity is adjustable bridge vibration absorption and isolation support |
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Patent Citations (11)
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| CN201169746Y (en) * | 2008-03-31 | 2008-12-24 | 衡水宝力工程橡胶有限公司 | Ball type height-adjusting support |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105625168A (en) * | 2016-03-15 | 2016-06-01 | 衡水中交信德工程橡塑有限公司 | Pot type rubber bearing for measuring force and adjusting height |
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Application publication date: 20150520 |
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