CN102744774B - Prefabricated small box girder adjustable template for curved bridge - Google Patents
Prefabricated small box girder adjustable template for curved bridge Download PDFInfo
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- CN102744774B CN102744774B CN201210226561.4A CN201210226561A CN102744774B CN 102744774 B CN102744774 B CN 102744774B CN 201210226561 A CN201210226561 A CN 201210226561A CN 102744774 B CN102744774 B CN 102744774B
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Abstract
A prefabricated small box girder adjustable template for a curved bridge comprises a standard section outer mould, an adjustable section outer mould, a middle diaphragm template, an end diaphragm template, and an inner mould, wherein the adjustable section outer mould is formed by nesting two adjustable section outer moulds, the two outer moulds are in slidable connection through a slide way, the standard section outer mould is sheathed at the rear of the inner mould, the adjustable section outer mould is sheathed at the front of the inner mould, the end diaphragm template is sheathed at the middle of the inner mould, the middle diaphragm template is sheathed at the front of the inner module, and the standard section outer mould, the end diaphragm template, the adjustable section outer mould and the middle diaphragm template are sequentially connected. According to the prefabricated small box girder adjustable template, after the small box girder poured by the template is installed on a bridge, the diaphragm can be ensured to be aligned, the shape of wet joint can be a regular rhomboid, and the cement can be well maintained during demoulding.
Description
Technical field
The present invention design relates to a kind of Small Precast Box beam forms, particularly be a kind of curved bridge prefabricated small box girder adjustable form.
Background technology
Along with the development of urban road and highway communication, the curved bridge of little case beam, owing to can adapting to well the needs of bridge location, landform restriction, is widely applied in overhead road of city and grade separation.Although traditional little box girder formwork of curved bridge meets the different requirement of arc length inside and outside curved bridge by making the template of different length, diaphragm plate angle cannot be unified, and often causes the little pile equipment of building cannot align to rear squab panel on bridge; Template end angle also cannot regulate, and wet seam shape can not become regular parallelogram; The corner of the some adjacent surfaces of template is acute angle, concrete scaling while causing the demoulding.The problem that these traditional little box girder formworks exist in making has all caused the curved bridge of little case beam stressed unreasonable in operation process, very easily further brings out the diseases such as curved bridge girder lateral displacement, torsional deformation, bearing come to nothing, bridge floor cracking.
Summary of the invention
For overcome the length of the little box girder formwork of existing curved bridge unadjustable, make the lower deficiency of precision, the object of this invention is to provide a kind of economical and efficient, curved bridge prefabricated small box girder adjustable form easy to make, its length is adjustable, end angle is adjustable, all corners are made obtuse angle form, guaranteed the little pile equipment of building by this template to rear squab panel on bridge can align, wet seam shape while becoming regular parallelogram, the demoulding concrete remain intact.
For achieving the above object, the invention provides following technical scheme:
A kind of curved bridge prefabricated small box girder adjustable form, described template comprises standard paragraphs external mold, adjustable section of external mold, middle diaphragm template, end diaphragm template and internal mold, wherein, adjustable section of external mold is by adjustable section of nested the forming of two-layer external mold, and two-layer external mold connects slidably by slideway; Described standard paragraphs outer die casing is contained in the rear portion of internal mold, adjustable section of outer die casing is contained in the front portion of internal mold, end diaphragm template is sleeved on the middle part of internal mold, and middle diaphragm template is sleeved on the front end of internal mold, and standard paragraphs external mold, end diaphragm template, adjustable section of external mold and middle diaphragm template are joined successively.
Further, the corner of described standard paragraphs external mold, end diaphragm template, adjustable section of external mold and middle diaphragm template is obtuse angle.
Beneficial effect of the present invention is: a kind of curved bridge prefabricated small box girder adjustable form that adopts the present invention's design, economical and efficient, easy to make not only, and can effectively guarantee the little pile equipment of building by this template to rear squab panel on bridge can align, wet seam shape while becoming regular parallelogram, the demoulding concrete remain intact.
Accompanying drawing explanation
Each modular construction of adjustable form figure that Fig. 1 provides for the embodiment of the present invention;
The adjustable form integral assembling figure that Fig. 2 provides for the embodiment of the present invention;
Length, end angle calculating chart are built in the segmentation that Fig. 3 provides for the embodiment of the present invention;
The curved bridge of quadrature grid and the curved bridge amount of deflection of oblique grid comparison diagram that Fig. 4 provides for the embodiment of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
With reference to Fig. 1 ~ Fig. 4, a kind of curved bridge prefabricated small box girder adjustable form, described template comprises standard paragraphs external mold 1, adjustable section of external mold 2, middle diaphragm template 3, end diaphragm template 4 and internal mold 5, wherein, adjustable section of external mold is by adjustable section of nested the forming of two-layer external mold, and two-layer external mold connects slidably by slideway; Described standard paragraphs outer die casing is contained in the rear portion of internal mold, adjustable section of outer die casing is contained in the front portion of internal mold, end diaphragm template is sleeved on the middle part of internal mold, and middle diaphragm template is sleeved on the front end of internal mold, and standard paragraphs external mold, end diaphragm template, adjustable section of external mold and middle diaphragm template are joined successively.
Aforesaid curved bridge prefabricated small box girder adjustable form, template can be turned case beam down and build length.According to section length result of calculation, select the suitable length of building, the nested type external mold of prefabricated processing is embedded on adjustable section of fixed dimension external mold, by slideway, adjust to the position of mark and fix, thereby reach little case beam, build length-adjustable object.
Aforesaid curved bridge prefabricated small box girder adjustable form, template can be turned case beam end angle down.According to end angle result of calculation, select the nested type external mold of proper angle, install and be fixed on adjustable section of fixed dimension external mold, and select the end diaphragm template nesting of respective angles to be fixed on internal mold, thereby reach the adjustable object of little case beam end angle.
Aforesaid curved bridge prefabricated small box girder adjustable form, has proposed set segmented length, the end angle shortcut Calculation theory of building.According to design drawing, obtain the data such as sweep, centre point, by simple computation, obtain a result fast, the choose reasonable of building length for end diaphragm masterplate, little case beam provides reliable theoretical foundation.
Aforesaid curved bridge prefabricated small box girder adjustable form, has verified diaphragm plate and the stressed optimum of bridge axis quadrature arrangement.By diaphragm plate relatively and amount of deflection, strained situation in bridge axis quadrature, diaphragm plate two kinds of situations parallel with side-strut, rigidity maximum while finding out diaphragm plate and bridge axis quadrature, for middle diaphragm plate angle provides theoretical foundation without adjustment.
Aforesaid curved bridge prefabricated small box girder adjustable form, the corner of all adjacent surfaces of template all designs the obtuse angle form of making, and not only form removal is convenient, and has effectively guaranteed that surperficial concrete does not peel off.
See figures.1.and.2, curved bridge prefabricated small box girder adjustable form, comprise following technical essential: 1. segmentation combination, standard paragraphs external mold 1, adjustable section of external mold 2, middle diaphragm template 3, end diaphragm template 4 and internal mold 5 2. adjustable section of external mold 2 of multi-angle nested type, 4 making of end diaphragm template of assembled moulding in order, different assemblings can form different sloped-end angles, and 3. adjustable section of two-layer external mold is nested, by slideway regulate little case beam build length 4. all corner design of template become obtuse angle.Template regulates little case beam to build length.
The common template of segmentation combination is comprised of middle standard paragraphs and two ends adjustable section, and standard paragraphs length is fixed, end vertical alignment, can make steel construction processing space is unified; Adjustable section of external mold 2 is comprised of fixed dimension external mold and nested type external mold, and fixed dimension external mold is made according to the minimum length of design, and nested type external mold template end is made different angles (0 °～20 °) and had enough adjustable-lengths; Also need the nested type template of a collection of different angles of prefabricated processing as middle diaphragm plate template 3 and end diaphragm plate template 4 simultaneously.
The common template of segmentation combination regulates while installing can be in accordance with the following steps: first fixed standard section external mold 1 and middle diaphragm template 3 are installed; That then uses that segmentation builds length and adjustable section of required adjusting of end angle shortcut Calculation Theoretical Prediction builds length and end angle; According to what estimate, build length and the corresponding nested type external mold of end angle Selection, two-layer external mold steel plate is nested, by slideway, adjusts to computational length, and and standard paragraphs external mold 1 and middle diaphragm 3 assemblings; Secondly, hoisting beam body framework of steel reinforcement, installs fixedly internal mold 5; Then according to the corresponding nested type template of end angle Selection of estimating, be used as end diaphragm plate template 4, and nested being fixed on internal mold 5; Finally assemble backform, thereby complete setting up of whole little box girder formwork and reinforcing bar.
Length, end angle are built in shortcut Calculation segmentation.Can carry out according to thinking below (can referring to accompanying drawing 3): the length sum 6 of supposing little box girder formwork standard paragraphs and adjustable section of fixed dimension external mold is l1, for certain Radius 7(R) under, in θ angle 8 scopes, thering is the beam body of equal length, every section of beam length 9 is
(building length), adjustable section of these beam two ends each need be by the length 10 that embedded external mold outwards extends
the angle 11 of corresponding selected nested type external mold and end diaphragm template is
Checking diaphragm plate and the stressed optimum of bridge axis quadrature arrangement.By template, regulate little case beam to build length and end angle, can make beam body middle each piece diaphragm plate and bridge axis quadrature (the curved bridge 12 of quadrature grid), now between adjacent girder, diaphragm plate length is the shortest, and rigidity is maximum, disperses the ability of load also just relatively strong.Situation compared with diaphragm plate parallel with side-strut (the curved bridge 13 of oblique grid), amount of deflection in the time of diaphragm plate and bridge axis quadrature (the curved bridge 12 of quadrature grid), should change little, arrangement is more excellent, the difference of two kinds of diaphragm arrangement amounts of deflection (can referring to accompanying drawing 4).
The present invention is economical and efficient, easy to make not only, and can effectively guarantee the little pile equipment of building by this template to rear squab panel on bridge can align, wet seam shape while becoming regular parallelogram, the demoulding concrete remain intact.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (2)
1. a curved bridge prefabricated small box girder adjustable form, it is characterized in that: described template is included in standard paragraphs external mold, end diaphragm template, adjustable section of external mold, middle diaphragm template and the internal mold that case beam longitudinal direction is arranged in order, wherein, adjustable section of external mold is by adjustable section of nested the forming of two-layer external mold, and two-layer external mold connects slidably by slideway; Described standard paragraphs outer die casing is contained in the rear portion of internal mold, adjustable section of outer die casing is contained in the front portion of internal mold, end diaphragm template is sleeved on the middle part of internal mold, and middle diaphragm template is sleeved on the front end of internal mold, and standard paragraphs external mold, end diaphragm template, adjustable section of external mold and middle diaphragm template are joined successively.
2. curved bridge prefabricated small box girder adjustable form as claimed in claim 1, is characterized in that: the corner of described standard paragraphs external mold, end diaphragm template, adjustable section of external mold and middle diaphragm template is obtuse angle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210226561.4A CN102744774B (en) | 2012-06-29 | 2012-06-29 | Prefabricated small box girder adjustable template for curved bridge |
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| CN201210226561.4A CN102744774B (en) | 2012-06-29 | 2012-06-29 | Prefabricated small box girder adjustable template for curved bridge |
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| CN102744774A CN102744774A (en) | 2012-10-24 |
| CN102744774B true CN102744774B (en) | 2014-12-03 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103572707B (en) * | 2013-11-21 | 2015-11-04 | 中铁六局集团有限公司 | Case girder steel outer template and construction method |
| CN107626822B (en) * | 2017-09-25 | 2023-11-10 | 浙江工业大学 | Adjustable die for prefabricated T-beam for small-radius bent bridge |
| CN110820513A (en) * | 2019-11-22 | 2020-02-21 | 中国电建集团贵阳勘测设计研究院有限公司 | Alignment construction method for diaphragm plate of prefabricated concrete T beam of curved bridge |
| CN113430941B (en) * | 2021-06-25 | 2023-05-26 | 中铁十九局集团第五工程有限公司 | Construction method for prefabricating inclined beam end single-line box beam on standard single-line box beam template |
| CN114603685B (en) * | 2022-03-09 | 2023-09-05 | 昆明理工大学 | Automatic mold and method for preparing layered filling body test pieces with different angles and heights |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201609922U (en) * | 2010-02-05 | 2010-10-20 | 浙江永峰模具制造有限公司 | Pull type prefabricated small box girder iron core |
| CN201614551U (en) * | 2010-02-05 | 2010-10-27 | 浙江永峰模具制造有限公司 | Prefabricated small box girder cross slope adjusting side mould |
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- 2012-06-29 CN CN201210226561.4A patent/CN102744774B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201609922U (en) * | 2010-02-05 | 2010-10-20 | 浙江永峰模具制造有限公司 | Pull type prefabricated small box girder iron core |
| CN201614551U (en) * | 2010-02-05 | 2010-10-27 | 浙江永峰模具制造有限公司 | Prefabricated small box girder cross slope adjusting side mould |
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