CN204780562U - It has just constructed aqueduct list case single chamber case roof beam in succession to become case variable cross section - Google Patents
It has just constructed aqueduct list case single chamber case roof beam in succession to become case variable cross section Download PDFInfo
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- CN204780562U CN204780562U CN201520293441.5U CN201520293441U CN204780562U CN 204780562 U CN204780562 U CN 204780562U CN 201520293441 U CN201520293441 U CN 201520293441U CN 204780562 U CN204780562 U CN 204780562U
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Abstract
The utility model discloses an it has just constructed aqueduct list case single chamber case roof beam in succession to become case variable cross section, single case single chamber case roof beam including the cross -section for the gradual change, the bottom plate of this list case single chamber case roof beam be one section thickness and keeps unanimous arch curve structure, and the bottom in water space be linear structure in single case single chamber case roof beam, forms the gradual change space between bottom plate and the water space, and the packing bed course makes and keeps the level bottom the water space in the space of changing gradually, the utility model provides a sharply increase and strengthened vertical prestressing steel's stress effect in advance of current case breast board bottom plate thickness, solved the problem of arranging that the anchor pinion rack was restrainted to the vertical prestressing force steel of case breast board, the temperature of single case single chamber case breast board is additional is reduced the gradient effect, the utility model discloses still having reduced and just having constructed the regional dead weight of aqueduct span centre in succession, improved the whole of structure and be out of shape, economic nature is good.
Description
Technical field
The utility model relates to a kind of change case variable cross-section continuous rigid frame aqueduct single box single chamber case beam, belongs to hydraulic engineering technical field.
Background technology
Along with developing rapidly of China's hydraulic engineering, the application of Long span defeated draining continuous rigid frame aqueduct is more and more extensive, and existing continuous rigid frame aqueduct single box single chamber case beam base plate curve parameter adopts parabola, circular arc line and broken line etc., simultaneously, for guaranteeing smooth in water flow in groove body and being connected with two casees box girder with variable cross section smoothly, single box single chamber case beam base plate upper limb generally adopt longitudinal gradient be 1/1000 ~ 1/3000 straight line, single box single chamber case beam is in the process transitting to two casees box girder with variable cross section cross sections, its base plate thickness sharply increases, result in single box single chamber box section area and the increase of bending resistance moment of inertia, significantly reduce the type heart position in cross section, obviously weaken the prestressing effect (referring to CN202450427U) of single box single chamber case beam region base plate longitudinal prestressing reinforcing bar, add the use amount of the base plate longitudinal prestressing reinforcing bar of whole continuous rigid frame aqueduct, simultaneously, single box single chamber case beam needs the distance of 15 ~ 20m just can transit to two casees box girder with variable cross section cross sections, result in the difficult arrangement of base plate longitudinal prestressing Bar Anchorage tooth plate, moreover, base arrangement concrete contacts generation 2 unfavorable factors with water body: 1. single box single chamber case beam base plate will produce an additional temp gradient effect, its maximum positive temperature difference is 14 DEG C, maximum subzero temperature difference is-6.5 DEG C, the positive compressive stress that the positive temperature difference will cause case beam base plate to increase about 4MPa, subzero temperature difference will cause the positive tensile stress of case beam base plate increase about-2MPa, seriously unfavorable to structure stress, further increase the use amount of base plate longitudinal prestressing reinforcing bar, 2. water body directly will corrode base arrangement concrete and top layer reinforcing bar, have impact on the durability of structure.
Utility model content
The purpose of this utility model is: for the defect of prior art, there is provided a kind of and become case variable cross-section continuous rigid frame aqueduct single box single chamber case beam, both reduced baseplate temp gradient effect, and base plate longitudinal prestressing Bar Anchorage tooth plate can have been solved again and arrange, to overcome the deficiency of existing slope retaining technology.
The technical solution of the utility model
A kind of change case variable cross-section continuous rigid frame aqueduct single box single chamber case beam, comprise the single box single chamber case beam that cross section is gradual change, the base plate of this single box single chamber case beam is the ogive curve structure that one section of thickness is consistent, and the bottom of Water space is linear structure in single box single chamber case beam, form gradually-changed space between base plate and Water space, in gradually-changed space, fill bed course make maintenance level bottom Water space.
Aforesaid one becomes in case variable cross-section continuous rigid frame aqueduct single box single chamber case beam, the described bed course of filling in gradually-changed space comprises waterproofing course two, light weight concrete construction bed course, gas concrete insulation layer and waterproofing course one from bottom to up successively, vertical height adjustable case beam base plate longitudinal prestressing steel bundle anchoring tooth plate is laid in light weight concrete construction bed course both sides, light weight concrete construction bed course and case beam base plate longitudinal prestressing steel bundle anchoring tooth plate improve constantly greatly its thickness along with the change of gradually-changed space, make the gas concrete insulation layer above being positioned at and waterproofing course one keep smooth.
Aforesaid one becomes in case variable cross-section continuous rigid frame aqueduct single box single chamber case beam, it is characterized in that: the thickness of waterproofing course one, gas concrete insulation layer and waterproofing course two is consistent building in variable cross-section single box single chamber case beam process.
Owing to have employed technique scheme, compared with the prior art, the single box single chamber case beam floor combination structure that the utility model adopts, the structure solving existing change case variable cross-section continuous rigid frame aqueduct only case single cell box girder is not enough, specific as follows: to solve case beam backings thickness and sharply increase (in case beam cross section progressively increase process, under case beam internal water body space remains unchanged condition, the base plate thickness be positioned at bottom case beam can only increase) a series of unfavorable result brought, significantly enhance the prestressing effect of longitudinal prestressing reinforcing bar, solve the Layout Problem of case beam base plate longitudinal prestressing steel bundle anchoring tooth plate, reduce single box single chamber case beam base plate additional temp gradient effect, the maximum positive and negative temperature difference reduces nearly 50%, waterproof slab ability strengthens nearly 2 times, enhances the durability of structure, compared with former technical scheme, base plate longitudinal prestressing steel bundle saves 40%, and achieve the safety stock being better than former technical scheme, in addition, the utility model also reduces the deadweight in continuous rigid frame aqueduct span centre region, improve the bulk deformation of structure, good economy performance.
Accompanying drawing explanation
Accompanying drawing 1 is the utility model structure structural representation;
Accompanying drawing 2 is A-A sectional views of accompanying drawing 1;
Accompanying drawing 3 is structural representations when not filling bed course in the utility model in gradually-changed space.
Detailed description of the invention
Below in conjunction with accompanying drawing to the utility model with being described in further detail, but not as to any restriction of the present utility model.
Embodiment of the present utility model: a kind of change case variable cross-section continuous rigid frame aqueduct single box single chamber box beam casting method, the method is being built in variable cross-section single box single chamber case beam process, single box single chamber case beam is progressively becoming its base plate lower edge formation ogive curve in large process along with cross section, its base plate upper limb adopts the Changing Pattern identical with curve parameter, base plate is made to form the equal ogive curve entirety of thickness (so in practice of construction work, if bridge span is too large, in order to meet design strength, suitably progressively should thicken base plate thickness, the upper limb of right base plate and the curvilinear trend of lower edge keep similar, make the reinforcing bar binding in construction in base plate and mixed earth easy construction, also can ensure that base sheet stresses change can not be undergone mutation, ensure its intensity), a gradually-changed space is formed between Water space in the case of base plate upper limb and single box single chamber case beam, in gradually-changed space, fill full bed course makes gradually-changed space upper surface smooth, and make gradually-changed space upper surface and single box single chamber case beam both sides form Water space in smooth case, thus realize the construction becoming case variable cross-section continuous rigid frame aqueduct single box single chamber case beam, bed course in this gradually-changed space comprises waterproofing course two from bottom to up successively, light weight concrete construction bed course, gas concrete insulation layer and waterproofing course one, vertical height adjustable case beam base plate longitudinal prestressing steel bundle anchoring tooth plate is laid in light weight concrete construction bed course both sides, light weight concrete construction bed course and case beam base plate longitudinal prestressing steel bundle anchoring tooth plate improve constantly greatly its thickness along with the change of gradually-changed space, the gas concrete insulation layer above being positioned at and waterproofing course one is made to keep smooth, and waterproofing course, the thickness of gas concrete insulation layer and waterproofing course two is consistent building in variable cross-section single box single chamber case beam process.
Case variable cross-section continuous rigid frame aqueduct single box single chamber case beam is become according to the one that said method is formed, as shown in drawings, comprise the single box single chamber case beam 1 that cross section is gradual change, the base plate 2 of this single box single chamber case beam 1 is that the ogive curve structure that is consistent of one section of thickness is (so in practice of construction work, if bridge span is too large, in order to meet design strength, suitably progressively should thicken base plate thickness, the upper limb of right base plate and the curvilinear trend of lower edge keep similar, make the reinforcing bar binding in construction in base plate and mixed earth easy construction, also can ensure that base sheet stresses change can not be undergone mutation, ensure its intensity), and the bottom of Water space 3 is linear structure in single box single chamber case beam 1, gradually-changed space 4 is formed between base plate 2 and Water space 3, in gradually-changed space 4, fill bed course make maintenance level bottom Water space 4.
The bed course of wherein filling in gradually-changed space 4 comprises waterproofing course 25 from bottom to up successively, light weight concrete construction bed course 6, gas concrete insulation layer 7 and waterproofing course 1, vertical height adjustable case beam base plate longitudinal prestressing steel bundle anchoring tooth plate 9 is laid in light weight concrete construction bed course 6 both sides, light weight concrete construction bed course 6 and case beam base plate longitudinal prestressing steel bundle anchoring tooth plate 9 improve constantly greatly its thickness along with the change of gradually-changed space 4, the gas concrete insulation layer 7 above being positioned at and waterproofing course 1 is made to keep smooth, and waterproofing course 1, the thickness of gas concrete insulation layer 7 and waterproofing course 25 is consistent building in variable cross-section single box single chamber case beam process.
Claims (3)
1. one kind becomes case variable cross-section continuous rigid frame aqueduct single box single chamber case beam, comprise the single box single chamber case beam (1) that cross section is gradual change, it is characterized in that: the base plate (2) of this single box single chamber case beam (1) is the ogive curve structure that one section of thickness is consistent, and the bottom of single box single chamber case beam (1) interior Water space (3) is linear structure, form gradually-changed space (4) between base plate (2) and Water space (3), in gradually-changed space (4), fill bed course make Water space (4) bottom keep level.
2. one according to claim 1 becomes case variable cross-section continuous rigid frame aqueduct single box single chamber case beam, it is characterized in that: the described bed course of filling in gradually-changed space (4) comprises waterproofing course two (5) from bottom to up successively, light weight concrete construction bed course (6), gas concrete insulation layer (7) and waterproofing course one (8), vertical height adjustable case beam base plate longitudinal prestressing steel bundle anchoring tooth plate (9) is laid in light weight concrete construction bed course (6) both sides, light weight concrete construction bed course (6) and case beam base plate longitudinal prestressing steel bundle anchoring tooth plate (9) improve constantly greatly its thickness along with the change of gradually-changed space (4), the gas concrete insulation layer (7) above being positioned at and waterproofing course one (8) is made to keep smooth.
3. one according to claim 1 becomes case variable cross-section continuous rigid frame aqueduct single box single chamber case beam, it is characterized in that: it is characterized in that: the thickness of waterproofing course one (8), gas concrete insulation layer (7) and waterproofing course two (5) is consistent building in variable cross-section single box single chamber case beam process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520293441.5U CN204780562U (en) | 2015-05-08 | 2015-05-08 | It has just constructed aqueduct list case single chamber case roof beam in succession to become case variable cross section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520293441.5U CN204780562U (en) | 2015-05-08 | 2015-05-08 | It has just constructed aqueduct list case single chamber case roof beam in succession to become case variable cross section |
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| Publication Number | Publication Date |
|---|---|
| CN204780562U true CN204780562U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520293441.5U Withdrawn - After Issue CN204780562U (en) | 2015-05-08 | 2015-05-08 | It has just constructed aqueduct list case single chamber case roof beam in succession to become case variable cross section |
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| Country | Link |
|---|---|
| CN (1) | CN204780562U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317001A (en) * | 2015-05-08 | 2016-02-10 | 贵州省水利水电勘测设计研究院 | Variable box variable cross section continuous rigid frame aqueduct single-box single-chamber box girder and design method thereof |
| CN112523061A (en) * | 2020-11-24 | 2021-03-19 | 广西交通设计集团有限公司 | UHPC stiffened prestressed concrete box girder bridge structure and construction process thereof |
-
2015
- 2015-05-08 CN CN201520293441.5U patent/CN204780562U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105317001A (en) * | 2015-05-08 | 2016-02-10 | 贵州省水利水电勘测设计研究院 | Variable box variable cross section continuous rigid frame aqueduct single-box single-chamber box girder and design method thereof |
| CN112523061A (en) * | 2020-11-24 | 2021-03-19 | 广西交通设计集团有限公司 | UHPC stiffened prestressed concrete box girder bridge structure and construction process thereof |
| CN112523061B (en) * | 2020-11-24 | 2022-06-14 | 广西交通设计集团有限公司 | UHPC stiffened prestressed concrete box girder bridge structure and construction process thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151118 Effective date of abandoning: 20170711 |
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| AV01 | Patent right actively abandoned |