CN212388382U - Supporting structure with pier shaft during steel truss girder construction - Google Patents
Supporting structure with pier shaft during steel truss girder construction Download PDFInfo
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- CN212388382U CN212388382U CN202020749193.1U CN202020749193U CN212388382U CN 212388382 U CN212388382 U CN 212388382U CN 202020749193 U CN202020749193 U CN 202020749193U CN 212388382 U CN212388382 U CN 212388382U
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Abstract
A supporting structure for a steel truss girder and a pier body during construction relates to the technical field of bridge building construction, and comprises a base, wherein a first jacking device and a second jacking device which are used for jacking synchronously are arranged on the base; first jacking device is furnished with first range finding sensor, first range finding sensor is used for detecting the flexible volume of first jacking device, second jacking device is furnished with second range finding sensor, second range finding sensor is used for detecting the flexible volume of second jacking device. This novel loading and unloading are simple, and degree of automation is high, can play the effect of continuous collaborative stress, and the tip atress that makes the steel truss roof beam is even basically, reduces the construction risk.
Description
Technical Field
The utility model relates to a bridge construction technical field, concretely relates to steel longeron when construction with bearing structure of pier shaft.
Background
The steel truss cantilever assembly is suitable for construction on high bridges, large spans, navigation and water depth flowing emergency bridge positions. The construction method comprises the following steps: firstly, a first span steel truss girder is assembled and constructed, then a second span steel truss girder is assembled by using the end part of the first span steel truss girder as a starting point under the condition that a support is not erected, and when the second span steel truss girder is assembled, a temporary support is required to be arranged at the pier top of a pier column for supporting. The existing support installation is as follows: the steel pad buttress that the gauge block waits height is directly installed on the mound top (the steel pad buttress is piled up the shaping by a plurality of layers of steel sheet), and the tip pad of steel longeron supports on the steel pad buttress, but not bearing the moment of flexure under the cantilever construction state of assembling at the junction of first steel longeron of striding and second steel longeron, will bear the shear force that the cantilever dead weight produced again, form the combination of curved shear at the support position of steel pad buttress, produce adverse effect to the whole atress of steel longeron construction.
The patent with the application number of CN201720516524.5 discloses a pier top double-row support cushion cooperative stress system during assembling of a steel truss cantilever, wherein a double-row temporary support is arranged on a pier top, a rear-row support is formed by laminating steel plates, the upper end of a front-row support is a rubber cushion block, the front-row support is not in contact with the cantilever during initial assembling, and the front-row support is pressed on the front-row support only after the cantilever is assembled to a certain length, so that the support structure in the patent only bears the force of the rear-row support during the previous assembling of the cantilever, and the rear-row support is installed on the pier top only after the cantilever is assembled to a certain length and serves as a coordinated stress support for downward deflection of the cantilever; the installation of temporary support all is comparatively loaded down with trivial details with demolising in this patent, and to large-scale steel truss cantilever construction, the cantilever is because the recurvation of dead weight warp great, and the rubber pad is too thin to cushion the recurvation and warp ability little, and too thick can not play the effect of coordination stress with the back row support again.
Disclosure of Invention
In order to solve the problems of the prior art, the utility model provides a supporting structure with pier shaft during steel truss girder construction, loading and unloading are simple, and degree of automation is high, can play the effect of continuous collaborative stress, makes the tip atress of steel truss girder even basically, reduces the construction risk.
The purpose of the utility model can be realized by the following technical proposal: a supporting structure for a steel truss girder during construction and a pier body comprises a base, wherein a first jacking device and a second jacking device which are synchronously jacked are arranged on the base, a base plate is arranged at the upper end of the first jacking device, and an elastic cushion block is arranged at the upper end of the second jacking device; first jacking device is furnished with first range finding sensor, first range finding sensor is used for detecting the flexible volume of first jacking device, second jacking device is furnished with second range finding sensor, second range finding sensor is used for detecting the flexible volume of second jacking device.
Preferably, the first jacking device comprises a pair of first hydraulic jacks for jacking synchronously, and the backing plate is fixedly arranged at the upper end part of the first hydraulic jack; the second jacking device comprises a pair of second hydraulic jacks capable of jacking synchronously, and the elastic cushion block is fixedly arranged at the upper end parts of the second hydraulic jacks. The cantilever has vibratility when assembling, can produce decurrent moment of flexure and lead to the micrometric displacement of downwarping simultaneously, and the micrometric displacement that can also cushion because of the moment of flexure produces when the elastic cushion can cushion the vibration effect.
Preferably, the elastic cushion block is a rubber cushion, an upper flat plate and a lower flat plate are respectively arranged at the upper end and the lower end of the elastic cushion block, and the lower flat plate is fixedly arranged at the upper end of the second hydraulic jack.
Preferably, the first distance measuring sensor and the second distance measuring sensor are communicated with a controller, and the controller is used for controlling the expansion and contraction of the first jacking device and the second jacking device.
Preferably, the controller is in communication with the touch screen panel. The touch screen panel is operating panel, and the numerical value that distance measuring sensor detected shows on the touch screen, and the length of assembling according to the cantilever simultaneously, the flexible volume of operation touch screen panel control second jacking device makes two jacking devices reach the effect of collaborative stress.
The utility model discloses an application principle: this novel install at the steel truss that the cantilever was assembled and the junction of the steel truss that has accomplished the assembly, specifically be with base fixed mounting on the mound top, first jacking device supports the steel truss tip of accomplishing the assembly, second jacking device supports the steel truss tip of just assembling at the cantilever, at first, two keeping unanimous of stretching out of two jacking devices, the length in-process of assembling at the cantilever is longer and longer more, the cantilever can produce decurrent micro deformation because of the dead weight, consequently, the power of pressing on second jacking device is bigger and bigger, so the controller need control second jacking device and withdraw stage by stage, the purpose is the balanced atress of balanced two jacking device tips, realize atress in coordination, reduce the danger coefficient.
The utility model discloses the combined effect who brings includes: the first jacking device and the second jacking device respectively support the end parts of the finished steel truss girder and the cantilever, and the second jacking device changes the jacking amount along with the increase of the length of the cantilever, so that the stress balance of the upper end parts of the two picnic shaped bodies can be controlled, the stress state of a pier top area is improved, the cooperative stress is realized, and the risk coefficient is reduced; in addition, this novel repeatedly usable, easy dismounting does not have the requirement to the direction that the cantilever was assembled moreover, and two sets of this novel devices of installation if the symmetry at the both ends of steel longeron promptly can synchronous use and cantilever be assembled under the condition that construction conditions allowed.
Drawings
Fig. 1 is a schematic view of an installation structure of an embodiment of the present invention.
Fig. 2 is a schematic diagram of the structure at a in fig. 1.
Fig. 3 is a schematic view of a top view structure of two jacking devices in an embodiment of the present invention.
Fig. 4 is a connection block diagram of the controller according to the embodiment of the present invention.
Wherein like parts are designated by like reference numerals throughout the several views; the figures are not drawn to scale.
Detailed Description
The invention is further described with reference to the following figures and examples.
Examples
A supporting structure for a steel truss girder during construction and a pier body comprises a base 1, wherein a mounting hole is formed in the base 1 and used for fixedly mounting the base 1 on a pier top 10, a first jacking device 2 and a second jacking device 3 which are used for jacking synchronously are mounted on the base 1, a base plate 4 is mounted at the upper end of the first jacking device 2, an elastic cushion block 5 is mounted at the upper end of the second jacking device 3, the elastic cushion block 5 is a rubber pad, an upper flat plate 6 and a lower flat plate 7 are respectively arranged at the upper end and the lower end of the elastic cushion block 5, and the lower flat plate 7 is fixedly mounted at the upper end of the second jacking device 3; the first jacking device 2 is provided with a first distance measuring sensor 8, the first distance measuring sensor 8 is used for detecting the expansion amount of the first jacking device 2, the first distance measuring sensor 8 is arranged beside the first jacking device 2, laser of the first distance measuring sensor 8 is vertically upwards shot out, and laser points are shot on the lower end face of the assembled steel truss girder; second jacking device 3 is furnished with second range sensor 9, second range sensor 9 is used for detecting the flexible volume of second jacking device 3, and second range sensor 9 is installed on the next door of second jacking device 3, and the laser of second range sensor 9 is vertical upwards to be beaten out, and the laser point is beaten on the bottom surface of cantilever.
The first jacking device 2 comprises a pair of first hydraulic jacks 21 capable of jacking synchronously, and the backing plate 4 is fixedly arranged at the upper end parts of the first hydraulic jacks 21; the second jacking device 3 comprises a pair of second hydraulic jacks 31 capable of jacking synchronously, and the elastic cushion block 5 is fixedly arranged at the upper end part of the second hydraulic jack 31. The cantilever has the vibratility when assembling, can produce decurrent moment of flexure and lead to the micrometric displacement of downwarping simultaneously, and elastic cushion 5 can cushion the micrometric displacement that produces because of the moment of flexure when can cushion the vibration effect.
The first distance measuring sensor 8 and the second distance measuring sensor 9 are both communicated with a controller, and the controller is used for controlling the first jacking device 2 and the second jacking device 3 to stretch and retract; the controller is in communication with the touch screen panel. Touch-sensitive screen panel is operating panel, and the numerical value that distance measuring sensor detected shows on touch-sensitive screen, and the length of assembling according to the cantilever simultaneously, the flexible volume of operation touch-sensitive screen panel control second jacking device 3 makes two jacking devices reach the effect of collaborative stress.
The utility model discloses use principle: this novel install at cantilever steel longeron 11 of assembling and the junction of the steel longeron 12 of assembling has been accomplished, specifically be with base 1 fixed mounting on the mound top, first jacking device 2 supports the steel longeron tip of accomplishing the assembling, second jacking device 3 supports the steel longeron tip of assembling at the cantilever, at first, two keeping unanimous of stretching out of jacking device, the length in-process of assembling at the cantilever is longer and longer more, the cantilever can produce decurrent micro deformation because of the dead weight, consequently, the power of pressing on second jacking device 3 is bigger and bigger, so the controller need control second jacking device 3 and withdraw stage by stage, the purpose is the stress balance of balanced two jacking device tip, realize atress in coordination, reduce the danger coefficient.
The embodiment of the utility model provides a comprehensive effect brought includes: the first jacking device 2 and the second jacking device 3 respectively support the end parts of the finished steel truss girder and the cantilever, and the second jacking device 3 changes the jacking amount along with the increase of the length of the cantilever, so that the stress balance of the upper end parts of two picnic shaped tripod bodies can be controlled, the stress state of a pier top area is improved, the cooperative stress is realized, and the risk coefficient is reduced; in addition, this novel repeatedly usable, easy dismounting does not have the requirement to the direction that the cantilever was assembled moreover, and two sets of this novel devices of installation if the symmetry at the both ends of steel longeron promptly can synchronous use and cantilever be assembled under the condition that construction conditions allowed.
The structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the purpose which can be achieved by the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
The present invention has been described above with reference to the preferred embodiments, but the scope of protection of the present invention is not limited thereto, and all technical solutions falling within the scope of the claims are within the scope of protection of the present invention. Various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict.
Claims (5)
1. A supporting structure for a steel truss girder during construction and a pier body is characterized by comprising a base, wherein a first jacking device and a second jacking device which are synchronously jacked are arranged on the base; first jacking device is furnished with first range finding sensor, first range finding sensor is used for detecting the flexible volume of first jacking device, second jacking device is furnished with second range finding sensor, second range finding sensor is used for detecting the flexible volume of second jacking device.
2. The steel truss girder construction and pier body supporting structure as claimed in claim 1, wherein the first jacking means includes a pair of first hydraulic jacks which can be synchronously jacked, and the pad plate is fixedly installed at an upper end portion of the first hydraulic jack; the second jacking device comprises a pair of second hydraulic jacks capable of jacking synchronously, and the elastic cushion block is fixedly arranged at the upper end parts of the second hydraulic jacks.
3. The support structure for the pier body during the construction of the steel truss girder according to claim 2, wherein the resilient pad is a rubber pad, an upper plate and a lower plate are respectively disposed at upper and lower ends of the resilient pad, and the lower plate is fixedly mounted at an upper end of the second hydraulic jack.
4. The supporting structure for the pier body during the construction of the steel truss girder according to claim 3, wherein the first distance measuring sensor and the second distance measuring sensor are both in communication with a controller, and the controller is used for controlling the first jacking device and the second jacking device to stretch and retract.
5. The steel truss construction and pier supporting structure of claim 4, wherein the controller is in communication with the touch screen panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020749193.1U CN212388382U (en) | 2020-05-08 | 2020-05-08 | Supporting structure with pier shaft during steel truss girder construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020749193.1U CN212388382U (en) | 2020-05-08 | 2020-05-08 | Supporting structure with pier shaft during steel truss girder construction |
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| CN212388382U true CN212388382U (en) | 2021-01-22 |
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| CN202020749193.1U Active CN212388382U (en) | 2020-05-08 | 2020-05-08 | Supporting structure with pier shaft during steel truss girder construction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921828A (en) * | 2021-02-07 | 2021-06-08 | 中铁四局集团有限公司 | Flexible landing pad device for erecting ultrahigh bearing support on cantilever of large-span railway steel truss girder bridge |
-
2020
- 2020-05-08 CN CN202020749193.1U patent/CN212388382U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921828A (en) * | 2021-02-07 | 2021-06-08 | 中铁四局集团有限公司 | Flexible landing pad device for erecting ultrahigh bearing support on cantilever of large-span railway steel truss girder bridge |
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