CN217257079U - Prefabricated T beam formwork with adjustable beam end deflection angle - Google Patents
Prefabricated T beam formwork with adjustable beam end deflection angle Download PDFInfo
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Abstract
The utility model discloses a prefabricated T beam template of adjustable beam-ends declination, including the end mould, the end mould is equipped with independent driving plate end mould and web end mould of each other, driving plate end mould installation angle is the same with design beam-ends declination, the web end mould is equipped with multiple, corresponds its fitting design beam-ends declination scope separately, all rigid couplings have the stretch-draw groove on the interior terminal surface of various web end moulds, the bottom surface of stretch-draw groove is perpendicular with precast beam axis; the maximum height of the panel protrusion of each web plate end mold corresponding to the end mold panel of the roadway plate is not greater than the maximum deviation value of the beam end allowed by design. Adopt the utility model discloses can produce the prefabricated T roof beam of different beam-ends declination, need not the secondary and pour the beam-ends declination part, the prefabricated beam-ends declination of production is accurate, the linear smooth-going of beam-ends, beam-ends wholeness is good, the construction is simple and convenient, construction cycle is short, simple structure, can original prefabricated beam side form of make full use of and pedestal, the template drops into for a short time.
Description
Technical Field
The utility model relates to a prefabricated T roof beam template, especially a prefabricated T roof beam template of adjustable beam-ends declination.
Background
Roads in mountainous areas are limited by terrain, longitudinal slopes and linear curvatures of bridges are large, and more simply-supported bridge bridges are prefabricated due to the consideration of earthquake resistance and uneven deformation resistance; especially, on the interchange overpass, the irregular precast beams with large deflection angle, large longitudinal slope and variable beam length are used in large quantity. The irregularity of the precast beam causes the precast beam to have complex precast process, the utilization rate of the conventional matched template and pedestal is low, the construction period and the cost investment are increased, and the original conventional precast beam template and pedestal can not be well adapted to the production of a large number of precast beams with complex and variable parameters.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the technical problem that exists among the well-known technology and provide a prefabricated T roof beam template of adjustable beam-ends declination, use the precast beam that multiple beam-ends declination can be produced to same set of template, can effectively promote the utilization ratio of template, improve the efficiency of construction, reduce the resource input.
The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a prefabricated T-beam template capable of adjusting beam end deflection angles comprises end molds, wherein each end mold is provided with a roadway plate end mold and a web plate end mold which are independent of each other, the roadway plate end molds and a designed beam end deflection angle are the same, the web plate end molds are provided with a plurality of types, the types correspond to the ranges of the beam end deflection angles of the designed beam ends in a fitting mode, tensioning grooves are fixedly connected to inner end faces of various web plate end molds, and the bottom faces of the tensioning grooves are perpendicular to the axis of a prefabricated beam; the maximum height of the various web end formwork panels protruding out of the corresponding end formwork panels of the roadway slab is not greater than the maximum deviation value of the beam end allowed by design.
The web end die is provided with a right offset web end die, a vertical web end die and a left offset web end die.
The deflection angle of the right deflection type web plate end mold is 80.54 degrees, and the deflection angle range of the fitted designed beam end is 75.96-85.24 degrees.
The deflection angle of the end die of the left deflection type web plate is 99.46 degrees, and the deflection angle range of the fitted designed beam end is 94.76 degrees-104.04 degrees.
The deflection angle of the vertical web plate end die is 90.0 degrees, and the deflection angle range of the fitted designed beam end is 85.24-94.76 degrees.
The utility model has the advantages and positive effects that: through the T beam-ends mould structure that adopts lane board end mould and web end mould separation, set up the stretch-draw groove on the web end mould to web end mould fitting design roof beam-ends declination of setting up different declination types has realized guaranteeing under the prerequisite of stretch-draw tank bottom and precast beam axis vertically, the purpose of producing the prefabricated T roof beam of different roof beam-ends declination, need not the secondary and pour roof beam-ends declination part, the precast beam-ends declination of producing is accurate, the linear smooth-going of roof beam-ends, the roof beam-ends wholeness is good, the construction is simple and convenient, construction cycle is short, moreover, the steam generator is simple in structure, can make full use of original precast beam side mould and pedestal, the template input is little.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the installation of end forms of the roadway panels and end forms of the web;
FIG. 3 is a schematic view of a right-offset web end die structure;
FIG. 4 is a schematic view of a vertical web end form configuration;
FIG. 5 is a schematic view of a left offset web end mold;
FIG. 6 is a schematic diagram of the end deflection angle deviation of the right deflection beam in the right deflection type web end mold fitting of the present invention;
fig. 7 is the utility model discloses a left side inclined to one side beam-ends declination deviation schematic diagram of left side type web end mould fitting.
In the figure: 1. a roadway plate end form; 2. a web end die; 3. a prestress tensioning groove; 4. prefabricating the beam axis; 5. a roadway plate end form panel; 6. web end form panels.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments will be illustrated in detail with reference to the accompanying drawings:
referring to fig. 1 to 7, a prefabricated T-beam template capable of adjusting a beam end deflection angle includes end molds, the end molds are provided with a roadway plate end mold 1 and a web plate end mold 2 which are independent of each other, an installation angle of the roadway plate end mold 1 is the same as a designed beam end deflection angle, the web plate end mold 2 is provided with a plurality of types, each corresponding to a designed beam end deflection angle range, a tensioning groove 3 is fixedly connected to an inner end surface of each web plate end mold, and a bottom surface of the tensioning groove 3 is perpendicular to a prefabricated beam axis 4; the maximum height delta x of the various web end model panels 6 protruding out of the corresponding roadway plate end model panels 5 is not more than the maximum deviation value | delta x of the beam end allowed by design max 。
In this embodiment, the width of the expansion joint is 80mm, and the allowable maximum deviation | Δ x $ of the beam end is ventilated max The web end die 2 is equipped with a right offset web end die, a vertical web end die and a left offset web end die at 25 mm. And the deflection angle of the right deflection type web plate end die is 80.54 degrees, and the deflection angle range of the fitted designed beam end is 75.96-85.24 degrees; the deflection angle of the end die of the left deflection type web plate is 99.46 degrees, and the deflection angle range of the fitted designed beam end is 94.76 degrees-104.04 degrees. The deflection angle of the vertical web plate end die is 90.0 degrees, and the deflection angle range of the fitted designed beam end is 85.24-94.76 degrees.
The design principle of the utility model is as follows:
dividing an end template into 1 web plate end mold 2 and 1 running track board end mold 1; because the web plate end die 2 comprises the prestress tension groove 3, the tension groove 3 is required to be vertical to the beam axis 4 and fixed with the web plate end die 2; adjusting the end deflection angle of the running board by adjusting the installation angle of the running board end mold 1; when the deflection angle of the beam end is too large, the deflection of the two sides of the web end and the design position is controlled to be the maximum deviation value | Deltax! allowed by the design by calculating the web end die 2 with different deflection angles max Within 25mm to avoid the excessive invasion of the edge of the web plate at the beam end into the designed expansion joint and the extrusion conflict with the adjacent beam end.
In order to solve the problems, the embodiment calculates that three web plate end molds are adopted, and the deflection angles are respectively 80.54 degrees, 90 degrees and 99.46 degrees, and the three web plate end molds are used for constructing the precast beam with larger deflection angles. The three end templates are respectively used for constructing precast beams within the following deflection angle ranges:
end template deflection angle application range
| Web end die deflection angle | Suitable for the end deflection angle range of the precast beam | Maximum beam-end deviation allowed by design |
| 80.54° | 75.96°～85.24° | 25mm |
| 90.0° | 85.24°～94.76° | 25mm |
| 99.46° | 94.76°～104.04° | 25mm |
The calculation process is as follows:
referring to fig. 6 and 7, the width B of the web end is 600mm, the beam end design deflection angle α varies between 78.76-104 °, and the web end mode deflection angle θ; the position of the end mould panel 5 of the roadway plate is consistent with the deflection angle of the designed beam end, and the deflection angle of the end mould panel 6 of the web plate is consistent with the deflection angle of the end mould of the web plate; the longitudinal distance between the designed positions on two sides (the transverse distance B/2 from the beam axis) of the web end and the beam axis of the beam end is H, the longitudinal distance between the actual position and the beam axis of the beam end is H, and the deviation between the actual position and the designed position is delta x; according to the geometrical relationship:
H＝cotα×B/2
h＝cotθ×B/2
Δx＝H-h＝(cotα-cotθ)×B/2
h, h in the above equation is a positive number indicating that the web end is forward on the right and rearward on the left as compared to the longitudinal position at the beam-end beam axis, and a negative number indicating that the web end is forward on the right and rearward on the left as compared to the longitudinal position at the beam-end beam axis; Δ x is a positive number indicating that the actual position of the web tip is right behind and left ahead compared with the design position, and a negative number indicating that the actual position of the web tip is right ahead and left behind compared with the design position.
When the design deflection angle alpha of the beam end is 104 degrees, H is-74.8 mm, if the web plate end mould panel is still perpendicular to the beam axis, namely theta is 0 degrees, H is 0mm, and delta x is H-H is-74.8 mm, namely the actual position of the right side of the web plate end is protruded 74.8mm more than the design position and invades into the design expansion joint; design expansion joint width is 80mm in this embodiment, and the maximum deviation | Deltax that allows divides beam-ends max Is 25 mm. In order to avoid excessive invasion of the edge of the web plate at the beam end into the designed expansion joint and extrusion conflict between the adjacent beam ends, the absolute value | Δ x | ≦ Δ x |, between the actual positions at the two sides of the web end and the deviation Δ x of the designed position, needs to be set by setting the offset angle θ of the web end mold max ＝25mm。
1) Vertical webThe end die deflection angle theta is equal to 90 degrees, and is suitable for designing the longitudinal distance H between the design positions on two sides of the web end (the transverse distance B/2 from the beam axis) and the beam axis of the beam end in- | delta x |, and the vertical distance H is equal to the transverse distance H max ～+|Δx| max The precast beam in the scope is obtained according to the geometric relation, and the suitable beam end declination scope of vertical web end mould is: 90-arctan [ | Deltax max /(B/2)]To 90 ° + arctan [ |. DELTA.x max /(B/2)]；
Arranging B600 mm, | Deltax | max Substituting 25mm into the above formula to obtain:
the deflection angle range of the beam end suitable for the vertical web plate end mould is 90-arctan [ | Deltax [ & lt & gt & lt & gt max /(B/2)]85.24 to 90 ° + arctan [ | Δ χ |) max /(B/2)]＝94.76°。
2) The type and value of an end mode deflection angle theta of a right deflection type web plate end die are determined according to the maximum value alpha of a designed beam end deflection angle max The width B of the web end and the maximum allowable deviation | Deltax max The method comprises the following steps:
the maximum value of the longitudinal distance between the design positions of two sides (the transverse distance B/2 from the beam axis) of the web end and the beam axis of the beam end is H max ＝cotα max ×B/2；
Each right-offset web plate end die can be suitable for the deviation of the design positions of two sides (the transverse distance B/2 from the beam axis) of the web plate end and the actual position of the web plate end die into | Deltax max ～+|Δx| max The application interval of the precast beam within the range, namely each right-offset web plate end die, is 2 x |. DELTA.xY max (ii) a The vertical web plate end die is suitable for designing the longitudinal distance H between the design positions of two sides of the web plate end (the transverse distance B/2 from the beam axis) and the longitudinal distance H of the beam end beam axis max ～+|Δx| max Precast beam in range of | H->|Δx| max Setting a web plate end die with a deflection angle, wherein the application range of the web plate end die with the deflection angle needs to completely cover | delta x max ～|H max In the | range, then | Δ x- max ～|H max (ii) 2X | Δ x | (Δ x |) per interval in | range max Configuring a web plate end mold, and finally remaining the dimension less than 2 x | delta x ¬ ventilated max The interval of the two end plates still needs to be provided with a web plate end die, so that the type number n of the right-handed offset web plate end die needs to be provided y ＝[(|H max |-|Δx| max )/(2×|Δx| max )]Rounding upwards;
the longitudinal distance between the positions of two sides (the transverse distance B/2 from the beam axis) of the web end corresponding to each right-offset web end die and the beam axis of the beam end is 2 kxDeltaxY max ，k＝1、2……n y The longitudinal distances between the positions of two sides (the transverse distance B/2 from the beam axis) of the web end corresponding to the upper limit position and the lower limit position of the application range of the right-deviation type web plate end die and the beam axis of the beam end are respectively (2k +1) × | delta x | max And (2k-1) × | Δ χ shading max ，k＝1、2……n y According to the geometrical relationship, the following can be known:
the deflection angle theta corresponding to each web plate end die is as follows: θ ═ 90 ° + arctan (2 kxDeltaxy max /(B/2))，k＝1、2……n y ；
The suitable beam end deflection angle range of the web plate end die with the deflection angle theta is as follows: 90 ° + arctan [ (2k-1) × | Δ χ | max /(B/2)]To 90 ° + arctan [ (2k +1) × | Δ χ |, + Y max /(B/2)]，k＝1、2……n y ；
In the above formula, | H | max The expression of | and | Δ x | is H, H max Δ x.
Will be alpha max ＝104°、B＝600mm、|Δx| max Substituting 25mm into the above formula to obtain:
H max ＝cotα max ×B/2＝-74.8mm；
the type and quantity of right deviation type web plate end molds to be equipped: n is y ＝[(|H max |-|Δx| max )/(2×|Δx| max )]Getting the whole upward to be 1;
deflection angle corresponding to the end mode: θ ═ 90 ° + arctan (2 × 1 × |. Δ x $ non-ventilated max /(B/2))＝99.46°；
The suitable beam end deflection angle range of the web plate end die with the deflection angle theta of 99.46 degrees is as follows:
90°+arctan[(2×1-1)×|Δx| max /(B/2)]94.76 DEG to 90 DEG + arctan [ (2 × 1+1) × | Δ χ max /(B/2)]＝104.04°。
3) The type and value of the end die deflection angle theta of the left deflection type web plate end die are determined according to the minimum value alpha of the designed beam end deflection angle min Web tip width B and allowanceThe maximum deviation value | Deltax & gt of beam end max The determination is calculated as follows:
the maximum value of the longitudinal distance between the design positions of two sides (the transverse distance B/2 from the beam axis) of the web end and the beam axis of the beam end is H max ＝cotα min ×B/2；
Each left deviation type web plate end die can be suitable for deviation of designed positions of two sides (the transverse distance B/2 from the beam axis) of the web plate end and the actual position of the web plate end die to be | delta x max ～+|Δx| max The application range of the prefabricated beam, namely the application range of each left offset web plate end mold is 2 x delta x max (ii) a The vertical web plate end die is suitable for designing the longitudinal distance H between the design positions of two sides of the web plate end (the transverse distance B/2 from the beam axis) and the longitudinal distance H of the beam end beam axis max ～+|Δx| max Precast beam in range of | H->|Δx| max When the method is used, a web plate end die with a deflection angle is arranged, and the application range of the web plate end die with the deflection angle needs to completely cover | delta x- max ～|H max In the | range, then | Δ x max ～|H max (ii) 2X | Δ x | (Δ x |) per interval in | range max Configuring a web plate end mold, and finally remaining the dimension less than 2 x | delta x ¬ ventilated max The interval of the two end plates still needs to be provided with a web plate end die, so that the type number n of the left offset web plate end die needs to be provided z ＝[(|H max |-|Δx| max )/(2×|Δx| max )]Rounding upwards;
the longitudinal distance between the positions of two sides (the transverse distance B/2 from the beam axis) of the web end corresponding to each left offset type web end die and the beam axis of the beam end is 2 kxDeltaxY max ，k＝1、2……n z The longitudinal distances between the positions of two sides (the transverse distance B/2 from the beam axis) of the web end corresponding to the upper limit position and the lower limit position of the application range of the left offset type web plate end die and the beam axis of the beam end are respectively (2k +1) × | delta x | max And (2k-1) × | Δ χ shading max ，k＝1、2……n z According to the geometrical relationship, the following can be known:
the deflection angle theta corresponding to each web plate end die is as follows: theta 90 ° -arctan (2 kxDeltax max /(B/2))，k＝1、2……n z ；
The suitable beam end deflection angle range of the web plate end die with the deflection angle theta is as follows:90°-arctan[(2k+1)×|Δx| max /(B/2)]to 90 ° -arctan [ (2k-1) × | Δ χ max /(B/2)]，k＝1、2……n z ；
In the above formula, | H |, | H max The expression of | and | Δ x | is H, H max Δ x.
Will alpha min ＝78.76°、B＝600mm、|Δx| max Substituting 25mm into the above formula to obtain:
H max ＝cotα min ×B/2＝59.6mm；
the types and the quantity of left offset web plate end molds to be equipped are as follows: n is z ＝[(|H max |-|Δx| max )/(2×|Δx| max )]Getting the whole upward to be 1;
an offset angle theta corresponding to the end module is 90-arctan (2 multiplied by 1 multiplied by delta x) non-conducting max /(B/2))＝80.54°；
The suitable beam end deflection angle range of the web plate end die with the deflection angle theta of 80.54 degrees is as follows:
90°-arctan[(2×1+1)×|Δx| max /(B/2)]75.96 DEG to 90 DEG arctan [ (2 x 1-1) × | Deltax- max /(B/2)]＝85.24°。
Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the scope of the present invention.
Claims (5)
1. A prefabricated T-beam template capable of adjusting beam end deflection angles comprises end molds and is characterized in that the end molds are provided with independent roadway plate end molds and web plate end molds, the roadway plate end molds and the designed beam end deflection angles are the same, the web plate end molds are provided with a plurality of types, the ranges of the beam end deflection angles are designed corresponding to the end molds in a fitting mode, tensioning grooves are fixedly connected to inner end faces of various web plate end molds, and the bottom faces of the tensioning grooves are perpendicular to the axis of a prefabricated beam; the maximum height of the various web end formwork panels protruding out of the corresponding end formwork panels of the roadway slab is not greater than the maximum deviation value of the beam end allowed by design.
2. The adjustable beam end skew angle prefabricated T-beam form of claim 1, wherein said web end form is equipped with a right-hand profiled web end form, a vertical profiled web end form and a left-hand profiled web end form.
3. The prefabricated T-beam formwork with adjustable beam-end deflection angle according to claim 2, wherein the deflection angle of the right-deflection type web plate end formwork is 80.54 degrees, and the fitted designed beam-end deflection angle ranges from 75.96 degrees to 85.24 degrees.
4. The adjustable beam-end skew angle precast T-beam formwork of claim 2, wherein the skew angle of the left-offset web end-form is 99.46 °, and the designed beam-end skew angle range of fitting is 94.76 ° -104.04 °.
5. The adjustable beam-end skew angle precast T-beam formwork of claim 2, wherein the skew angle of the vertical-type web end formwork is 90.0 °, and the designed beam-end skew angle range of the fitting is 85.24 ° to 94.76 °.
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