CN114481846A - Cast-in-place construction method of bridge concrete bridge deck and bridge construction formwork - Google Patents
Cast-in-place construction method of bridge concrete bridge deck and bridge construction formwork Download PDFInfo
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- CN114481846A CN114481846A CN202210110509.6A CN202210110509A CN114481846A CN 114481846 A CN114481846 A CN 114481846A CN 202210110509 A CN202210110509 A CN 202210110509A CN 114481846 A CN114481846 A CN 114481846A
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention provides a cast-in-place construction method of a bridge concrete bridge deck and a bridge construction formwork. The cast-in-place construction method of the bridge concrete bridge deck provided by the embodiment of the invention comprises the following steps: A) a plurality of middle cross beams which are arranged at intervals along the length direction of the bridge are arranged between two adjacent main beams; B) a plurality of middle purlins which are arranged at intervals along the width direction of the bridge are arranged between two adjacent main beams, wherein each middle purlin is arranged on the upper surface of at least one part of the corresponding middle cross beams; C) arranging a middle template between two adjacent main beams, wherein the upper surface of the middle template and the upper surfaces of the main beams form a pouring surface; and D) casting concrete on the casting surface to form the concrete bridge deck. Therefore, the cast-in-place construction method of the bridge concrete bridge deck according to the invention has the advantages of quickening the construction speed, reducing the construction cost and facilitating the formation of the concrete bridge deck.
Description
Technical Field
The invention relates to the technical field of bridges, in particular to a cast-in-place construction method of a bridge concrete bridge deck and a bridge construction formwork.
Background
In the related art, a formwork is required to be arranged during the construction of the cast-in-place concrete bridge deck, and then concrete is cast on the formwork in situ. The full cast-in-place concrete bridge deck has good integrity, easily meets the section requirements of various bridge decks, but has large template engineering quantity and field wet operation quantity and slower construction speed. When the template can't be supported by the girder steel completely, still need set up full hall and fall to the ground the scaffold frame, the operating expenses is high, and is big to the influence of all ring edge borders.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides a cast-in-place construction method of a bridge concrete bridge deck and a bridge construction formwork.
The cast-in-place construction method of the bridge concrete deck slab provided by the embodiment of the invention comprises the following steps of:
A) a plurality of middle cross beams which are arranged at intervals along the length direction of the bridge are arranged between two adjacent main beams, the length direction of each middle cross beam is consistent with the width direction of the bridge, one end of each middle cross beam is connected with one of the two corresponding main beams, and the other end of each middle cross beam is connected with the other one of the two corresponding main beams;
B) a plurality of middle purlins which are arranged at intervals along the width direction of the bridge are arranged between every two adjacent main beams, the length direction of each middle purlin is consistent with the length direction of the bridge, and each middle purlin is arranged on the upper surface of at least one part of the corresponding middle cross beams;
C) arranging intermediate templates between every two adjacent main beams, wherein each intermediate template is arranged on the upper surfaces of the corresponding intermediate purlines, and the upper surfaces of the intermediate templates and the upper surfaces of the main beams form a pouring surface; and
D) pouring concrete on the pouring surface to form a concrete bridge deck.
Therefore, the cast-in-place construction method of the bridge concrete bridge deck according to the embodiment of the invention has the advantages of quickening the construction speed, reducing the construction cost and facilitating the formation of the concrete bridge deck.
In some embodiments, the plurality of girders includes a first edge girder and a second edge girder at both ends of the plurality of girders in a width direction of the bridge, wherein the girders are spaced apart from each other by a distance that is less than the width of the bridge
In step a), providing a plurality of first edge beams on the first edge girder, each of the first edge beams extending from the first edge girder in a direction away from the second edge girder in a width direction of the bridge, and providing a plurality of second edge beams on the second edge girder, each of the second edge beams extending from the second edge girder in a direction away from the first edge girder in the width direction of the bridge;
in the step B), a plurality of first edge purlins arranged at intervals in the width direction of the bridge are arranged on the upper surfaces of the plurality of first edge cross beams, the length direction of each first edge purlin is consistent with the length direction of the bridge, a plurality of second edge purlins arranged at intervals in the width direction of the bridge are arranged on the upper surfaces of the plurality of second edge cross beams, and the length direction of each second edge is consistent with the length direction of the bridge;
in the step C), a first edge formwork is arranged on the upper surfaces of the first edge purlins, a second edge formwork is arranged on the upper surfaces of the second edge purlins, and the upper surface of the middle formwork, the upper surface of the first edge formwork, the upper surface of the second edge formwork and the upper surfaces of the main beams form the pouring surface.
The invention also provides a bridge construction formwork suitable for the cast-in-place construction method of the bridge concrete bridge deck slab, which comprises
The length direction of each main beam is consistent with that of the bridge, and the main beams are arranged at intervals along the width direction of the bridge; and
the middle support frame is arranged between two adjacent main beams and comprises a support frame
A plurality of middle cross beams which are arranged at intervals along the length direction of the bridge are arranged between two adjacent main beams, the length direction of each middle cross beam is consistent with the width direction of the bridge, one end of each middle cross beam is connected with one of the two corresponding main beams, and the other end of each middle cross beam is connected with the other one of the two corresponding main beams;
a plurality of intermediate purlins which are arranged at intervals along the width direction of the bridge are arranged between two adjacent main beams, the length direction of each intermediate purlin is consistent with the length direction of the bridge, and each intermediate purlin is arranged on the upper surface of at least one part of the intermediate cross beams; and
the middle formwork is arranged between every two adjacent main beams, each middle formwork is arranged on the upper surface of the corresponding middle purline, and the upper surface of each middle formwork and the upper surfaces of the corresponding main beams form a pouring surface.
In some embodiments, the plurality of main beams includes a first edge main beam and a second edge main beam, the first edge main beam and the second edge main beam being located at both ends of the plurality of main beams in a width direction of the bridge;
the first edge girder is provided with a first edge support frame which comprises
The first edge beam is arranged on the first edge girder at intervals along the length direction of the bridge, and each first edge beam extends from the first edge girder to the direction far away from the second edge girder along the width direction of the bridge;
a plurality of first edge purlins which are arranged at intervals along the width direction of the bridge are arranged on at least one part of the upper surfaces of the plurality of first edge cross beams, and the length direction of each first edge purlin is consistent with the length direction of the bridge; and
the upper surfaces of the first edge purlines are provided with the first edge templates;
the second edge main beam is provided with a second edge support frame, and the second edge support frame comprises
A plurality of second edge beams arranged at intervals along the length direction of the bridge are arranged on the second edge girder, and each second edge beam extends from the second edge girder to a direction far away from the first edge girder along the width direction of the bridge;
a plurality of second edge purlins which are arranged at intervals along the width direction of the bridge are arranged on the upper surface of at least one part of the second edge cross beams, and the length direction of each second edge is consistent with the length direction of the bridge; and
and the upper surfaces of the plurality of second edge purlins are provided with the second edge templates, wherein the upper surface of the middle template, the upper surface of the first edge template, the upper surface of the second edge template and the upper surfaces of the plurality of main beams form the pouring surface.
In some embodiments, the distance between two adjacent middle cross beams between two adjacent main beams in the length direction of the bridge is 0.5m-2m, the distance between two adjacent first edge cross beams in the length direction of the bridge is 0.5m-2m, and the distance between two adjacent second edge cross beams in the length direction of the bridge is 0.5m-2 m;
optionally, the distance between two adjacent middle cross beams between two adjacent main beams in the length direction of the bridge is 1m, the distance between two adjacent first edge cross beams in the length direction of the bridge is 1m, and the distance between two adjacent second edge cross beams in the length direction of the bridge is 1 m.
In some embodiments, the ratio of the bearing capacity of each of the first and second edge beams to the bearing capacity of the middle beam is (3-5): 1;
and/or a ratio of each of a moment of area inertia of the first edge beam and a moment of area inertia of the second edge beam to a moment of area inertia of the middle beam is (2-3): 1.
In some embodiments, the ends of the intermediate beams are connected to first stiffeners on the main beams by first bolts, the ends of the first edge beams and the ends of the second edge beams are connected to second stiffeners on the main beams by second bolts, and the ratio of the number of first bolts connected to each of the first stiffeners to the number of second bolts connected to each of the second stiffeners is 1: (3-5).
In some embodiments, the main beam is an i-shaped main beam, and the upper surfaces of the middle form, the first edge form, and the second edge form are at a level with the upper surface of the upper wing plate of the main beam.
In some embodiments, each of the intermediate purlins includes a plurality of sections of intermediate sub-purlins arranged along a length direction of the bridge, the plurality of sections of intermediate sub-purlins are sequentially connected end to end along the length direction of the bridge, each of the first edge purlins includes a plurality of sections of first edge sub-purlins arranged along the length direction of the bridge, the plurality of sections of first edge sub-purlins are sequentially connected end to end along the length direction of the bridge, each of the second edge purlins includes a plurality of sections of second edge sub-purlins arranged along the length direction of the bridge, and the plurality of sections of second edge sub-purlins are sequentially connected end to end along the length direction of the bridge.
In some embodiments, pegs are provided on the upper surface of the main beam.
Drawings
Fig. 1 is a schematic view of a bridge construction formwork according to an embodiment of the present invention.
Fig. 2 is a schematic view of a bridge construction formwork according to an embodiment of the present invention.
Reference numerals are as follows:
a bridge construction formwork 100;
a main beam 1, a first edge main beam 11, a first stiffening rib 101, a second stiffening rib 111, a first bolt 12, a second bolt 13, a stud 14;
a middle cross member 21, a first edge cross member 22;
an intermediate purlin 31, a first edge purlin 32;
an intermediate template 41, a first edge template 42;
concrete bridge deck 5.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A cast-in-place construction method of a bridge concrete deck according to an embodiment of the present invention will be described with reference to the accompanying drawings. The invention provides a cast-in-place construction method of a bridge concrete bridge deck.
The bridge comprises a plurality of girders 1, the length direction of each girder 1 is consistent with the length direction of the bridge, the girders 1 are arranged at intervals along the width direction of the bridge, and the cast-in-place construction method comprises the following steps:
A) a plurality of middle cross beams 21 are arranged between two adjacent main beams 1 at intervals along the length direction of the bridge, and the length direction of each middle cross beam 21 is consistent with the width direction of the bridge. Wherein one end of each intermediate cross beam 21 is connected to one of the respective two main beams 1, and the other end of each intermediate cross beam 21 is connected to the other of the respective two main beams 1.
B) A plurality of middle purlins 31 which are arranged at intervals along the width direction of the bridge are arranged between two adjacent main beams 1, and the length direction of each middle purlin 31 is consistent with the length direction of the bridge. Wherein each intermediate purlin 31 is provided on an upper surface of at least a portion of a respective plurality of intermediate cross beams 21.
C) Intermediate formworks 41 are arranged between two adjacent main beams 1, each intermediate formwork 41 is arranged on the upper surfaces of the corresponding intermediate purlins 31, and the upper surfaces of the intermediate formworks 41 and the upper surfaces of the main beams 1 form a pouring surface.
D) Concrete is poured on the pouring surface to form a concrete bridge deck 5.
According to the cast-in-place construction method of the bridge concrete deck slab, a plurality of middle cross beams 21 which are arranged at intervals are arranged among the main beams 1, and a plurality of middle purlins 31 are arranged on the middle cross beams 21. The direction of the intermediate cross beams 21 is perpendicular to the direction of the intermediate purlins 31, and the length direction of the intermediate cross beams 21 is perpendicular to the length direction of the intermediate purlins 31. Thereby allowing the plurality of intermediate purlins 31 to engage and carry the intermediate formworks 41 with the plurality of intermediate transverse beams 21.
Therefore, the cast-in-place construction method of the bridge concrete bridge deck according to the embodiment of the invention has the advantages of quickening the construction speed, reducing the construction cost and facilitating the formation of the concrete bridge deck 5.
The present invention also provides a bridge construction formwork 100 suitable for the cast-in-place construction method of the bridge concrete deck according to the embodiment of the present invention, and the cast-in-place construction method of the bridge concrete deck according to the embodiment of the present invention will be specifically described below with reference to the bridge construction formwork 100 according to the embodiment of the present invention.
As shown in fig. 1 and 2, a bridge construction formwork 100 according to an embodiment of the present invention includes a plurality of girders 1, an intermediate support frame, a first edge support frame, and a second edge support frame.
The length direction of each girder 1 is consistent with the length direction of the bridge, and the plurality of girders 1 are arranged at intervals along the width direction of the bridge. The plurality of girders 1 include first and second edge girders 11 and 11, which are located at both ends of the plurality of girders 1 in the width direction of the bridge. That is, the girder 1 located at the outermost end in the width direction of the bridge among the plurality of girders 1 constitutes the first edge girder 11 and the second edge girder, respectively. Specifically, the length of the girder 1 coincides with the length of the bridge. For convenience of understanding, the following description will be made in detail with the longitudinal direction of the bridge being the front-rear direction and the width direction of the bridge being the left-right direction, as indicated by arrow a in fig. 1 and 2, and the up-down direction being indicated by arrow B in fig. 1 and 2.
For example, the longitudinal direction of the main beam 1 is the front-rear direction, the plurality of main beams 1 are provided at intervals in the left-right direction, the first edge main beam 11 is located on the rightmost side of the plurality of main beams 1, and the second edge main beam is located on the leftmost side of the plurality of main beams 1.
As shown in fig. 1 and 2, intermediate support frames are provided between adjacent main beams 1, each of which includes an intermediate cross beam 21, an intermediate purlin 31, and an intermediate formwork 41. The first edge girder 11 is provided with first edge support frames including first edge beams 22, first edge purlins 32 and first edge formworks 42. And a second edge support frame is arranged on the second edge main beam and comprises a second edge cross beam, a second edge purline and a second edge template.
The length direction of each middle cross member 21, the length direction of each first edge cross member 22, and the length direction of each second edge cross member all coincide with the width direction of the bridge. The length of each first edge beam 22 and the length of each second edge beam are smaller than the length of the middle beam 21.
A plurality of middle cross beams 21 which are arranged at intervals along the length direction of the bridge are arranged between two adjacent main beams 1. Wherein one end of each intermediate cross beam 21 is connected to one of the respective two main beams 1, and the other end of each intermediate cross beam 21 is connected to the other of the respective two main beams 1. The respective two main beams 1 refer to two main beams 1 adjacent and located on either side of the intermediate cross beam 21. That is, a plurality of middle cross beams 21 are arranged between any two adjacent main beams 1 at intervals along the length direction of the bridge, so that a middle cross beam support frame composed of a plurality of middle cross beams 21 is arranged between any two adjacent main beams 1, and each middle cross beam support frame is connected with the corresponding two main beams 1 so as to provide a supporting force for the middle formwork 1.
The first edge girder 11 is provided with a plurality of first edge girders 22 arranged at intervals in the length direction of the bridge, and each first edge girder 22 extends in the width direction of the bridge from the first edge girder 11 in a direction away from the second edge girder. Specifically, one end of the first edge beam 22 is disposed on the first edge beam 11, and the other end (away from the second edge beam) of the first edge beam 22 is suspended. Providing a plurality of first edge beams 22 on the first edge beam 11 allows the first edge beam 11 to be provided with a first edge beam support comprised of the plurality of first edge beams 22 that is connected to the first edge beam 11 to provide support to the first edge form 42.
The second edge girder is provided with a plurality of second edge beams arranged at intervals along the length direction of the bridge, and each second edge beam extends from the second edge girder in the width direction of the bridge to a direction far away from the first edge girder 11. Specifically, one end of the second edge beam is arranged on the second edge main beam, and the other end (far from the first edge main beam 11) of the second edge beam is suspended. And a plurality of second edge cross beams are arranged on the second edge main beam, so that a second edge cross beam support frame consisting of the plurality of second edge cross beams is arranged on the second edge main beam, and the second edge cross beam support frame is connected with the second edge main beam so as to provide support force for the second edge template.
For example, the longitudinal directions of the plurality of middle cross members 21, the longitudinal directions of the plurality of first edge cross members 22, and the longitudinal directions of the plurality of second edge cross members are all left-right directions. The left end and the right end of each middle cross beam 21 are connected with the connected main beams 1; the left end of each first edge beam 22 is connected with the first edge main beam 11, and the right end of each first edge beam 22 is suspended; the right end of each second edge beam is connected with the second edge main beam, and the left end of each second edge beam is arranged in a suspended mode. A plurality of intermediate cross members 21 between the two corresponding main beams 1 are arranged at intervals in the front-rear direction, a plurality of first edge cross members 22 are arranged at intervals in the front-rear direction, and a plurality of second edge cross members are arranged at intervals in the front-rear direction.
In some embodiments, the distance between two adjacent middle cross beams 21 between two adjacent main beams 1 in the length direction of the bridge is 0.5m-2m, the distance between two adjacent first edge cross beams 22 in the length direction of the bridge is 0.5m-2m, and the distance between two adjacent second edge cross beams in the length direction of the bridge is 0.5m-2 m. Thus, a distance of 0.5m-2m may result in a greater support force of the support frame formed by each of the middle beam 21, the first edge beam 22 and the second edge beam. The smaller the distance of the cross beam in the length direction of the bridge is, the larger the supporting force of the formed bracket is; the larger the distance of the cross beam in the length direction of the bridge is, the less materials are used and the less engineering quantity is required.
Optionally, the distance between two adjacent middle cross beams 21 between two adjacent main beams 1 in the length direction of the bridge is 1m, the distance between two adjacent first edge cross beams 22 in the length direction of the bridge is 1m, and the distance between two adjacent second edge cross beams in the length direction of the bridge is 1 m. Therefore, the supporting force and the engineering quantity formed by the cross beam are balanced.
As shown in fig. 1 and 2, the length direction of each intermediate purlin 31, the length direction of each first edge purlin 32, and the length direction of each second edge purlin are all aligned with the length direction of the bridge.
A plurality of intermediate purlins 31 are arranged between two adjacent main beams 1 at intervals along the width direction of the bridge, wherein each intermediate purlin 31 is arranged on the upper surface of at least one part of the corresponding plurality of intermediate cross beams 21. And intermediate formworks 41 are arranged between two adjacent main beams 1, and each intermediate formwork 41 is arranged on the upper surfaces of a corresponding plurality of intermediate purlins 31. The corresponding plurality of intermediate purlins 31 refers to the plurality of intermediate purlins 31 between two same adjacent main beams 1 with the intermediate template 41. That is, the plurality of intermediate purlins 31 are located between the intermediate form 41 and the plurality of intermediate cross members 21 (intermediate cross member support frames) in the up-down direction. The plurality of intermediate purlins 31 are in contact with the intermediate form 41, so that the pressing force of the intermediate form 41 is dispersed to the plurality of intermediate beams 21 (intermediate beam support frames) through the corresponding plurality of intermediate purlins 31 to prevent the collapse of the concrete on the intermediate form 41.
A plurality of first edge purlins 32 are provided on at least a portion of the upper surfaces of the plurality of first edge beams 22 at intervals in the width direction of the bridge, and a first edge form 42 is provided on the upper surfaces of the plurality of first edge purlins 32. This allows the pressure of the first edge form 42 to be distributed across the plurality of first edge purlins 32 to the plurality of first edge beams 22 (first edge beam support brackets) to prevent the first edge form 42 from collapsing.
And a plurality of second edge purlins which are arranged at intervals along the width direction of the bridge are arranged on the upper surfaces of at least one part of the second edge cross beams, and second edge templates are arranged on the upper surfaces of the second edge purlins. The pressure of the second edge form is thereby distributed through the second edge purlin to the plurality of second edge beams (second edge beam support brackets) to prevent collapse of the concrete on the second edge beams.
The distance between two adjacent middle purlins 31 between two adjacent main beams 1 in the width direction of the bridge is 0.3m-0.6m, the distance between two adjacent first edge purlins 32 in the width direction of the bridge is 0.3m-0.6m, and the distance between two adjacent second edge purlins in the width direction of the bridge is 0.3m-0.6 m.
For example, the length of each intermediate purlin 31, the length of each first edge purlin 32, and the length of each second edge purlin are all fore-aft. A plurality of middle purlins 31 between two adjacent main beams 1 are arranged at intervals along the left-right direction, a plurality of first edge purlins 32 are arranged at intervals along the left-right direction, and a plurality of second edge purlins are arranged at intervals along the left-right direction.
As shown in fig. 1 and 2, in some embodiments, each intermediate purlin 31 includes a plurality of intermediate sub-purlins arranged along the length of the bridge, and the plurality of intermediate sub-purlins are connected end to end along the length of the bridge. Namely, two opposite sections of the intermediate purlins in the length direction of the bridge have no gap, so that the contact area between each intermediate purlin 31 and the intermediate template 41 is larger, and the pressure of the intermediate template 41 is better distributed. Specifically, two sections of intermediate sub-purlins opposite in the length direction of the bridge can abut against each other. Alternatively, two sections of intermediate purlins opposite to each other in the length direction of the bridge are fixed together by a connecting piece, so that each intermediate purlin 31 is more stable.
Each first edge purlin 32 includes a plurality of segments of first edge sub-purlins arranged along the length of the bridge, and the segments of first edge sub-purlins are sequentially connected end to end along the length of the bridge. I.e., there is no gap between the opposing first edge purlins along the length of the bridge, thereby providing a greater contact area between each first edge purlin 32 and the first edge form 42 to better distribute the compressive forces of the first edge form 42. In particular, two lengths of first edge sub-purlins that are opposite in the length direction of the bridge may abut against each other. Alternatively, two lengths of first edge sub-purlins that are opposite in the length direction of the bridge are secured together by connectors so that each first edge purlin 32 is more stable.
Each second edge purlin comprises a plurality of sections of second edge sub-purlins which are arranged along the length direction of the bridge, and the plurality of sections of second edge sub-purlins are sequentially connected end to end along the length direction of the bridge. Namely, two sections of second edge sub-purlins which are opposite in the length direction of the bridge are free from gaps, so that the contact area of each second edge purlin and the second edge template is larger, and the pressure of the second edge template is better distributed. Specifically, two sections of second edge sub-purlins which are opposite in the length direction of the bridge can abut against each other. Or, two sections of second edge sub-purlins which are opposite to each other in the length direction of the bridge are fixed together through the connecting piece, so that each second edge purlin is more stable.
As shown in fig. 1 and 2, in some embodiments, the main beam 1 is an i-shaped main beam 1, and the middle formwork 41, the first edge formwork 42 and the second edge formwork are connected to the upper wing plate of the corresponding main beam 1. The upper surfaces of the middle formwork 41, the first edge formwork 42 and the second edge formwork are on the same level with the upper surface of the upper wing plate of the main beam 1. So that the upper surfaces of the middle formworks 41, the first edge formworks 42, the second edge formworks, and the plurality of main girders 1 constitute a casting surface on which concrete is cast to form the concrete deck 5.
The connection of the intermediate formworks 41, the first edge formworks 42 and the second edge formworks with the upper wing plates of the corresponding main beams 1 comprises: a. the intermediate formworks 41, the first edge formworks 42 and the second edge formworks abut against the upper wing plates of the corresponding main beams 1; b. the middle formworks 41, the first edge formworks 42 and the second edge formworks are connected with the upper wing plates of the corresponding main beams 1 through fixing parts, so that the connection of the middle formworks 41, the first edge formworks 42 and the second edge formworks with the upper wing plates of the corresponding main beams 1, and the connection of the middle formworks 41, the first edge formworks 42 and the second edge formworks with the upper wing plates of the corresponding main beams 1 are more stable.
As shown in fig. 1 and 2, in some implementations, the girder 1 is provided with stiffening ribs on the web, in particular, the girder 1 is provided with a first stiffening rib 101 connected to the intermediate beam 21, and the girder 1 is provided with a second stiffening rib 111 connected to the first edge beam 22 and the second edge beam. The main beam 1, the cross beam, the purlines and the template are connected in sequence through bolts.
Specifically, the end of the middle cross member 21 is connected to the first stiffener 101 on the main member 1 by the first bolt 12, and the end of the first edge cross member 22 and the end of the second edge cross member are connected to the second stiffener 111 on the main member 1 by the second bolt 13. The ratio of the number of first bolts 12 connected to each first stiffener 101 to the number of second bolts 13 connected to each second stiffener 111 is 1: (3-5). Thereby, the connection of the end of the first edge beam 22 and the end of the second edge beam connection to the main beam 1 can be made more secure.
In some embodiments, the ratio of the bearing capacity of each of the first and second edge beams 22 to the bearing capacity of the middle beam is (3-5):1, with the bearing capacity of the first edge beam 22 and the bearing capacity of the second edge beam being equal. Thus, the load bearing capacity of the first edge beam 22 and the load bearing capacity of the second edge beam being greater than the load bearing capacity of the middle beam allows the first edge beam 22 to better support the first edge form 42, preventing concrete on the first edge form 42 from crushing the first edge beam 22; so that the second edge beam can better support the second edge formwork and prevent the concrete on the second edge formwork from crushing the second edge beam.
In some embodiments, the ratio of each of the first edge beam's 22 and second edge beam's moments of inertia to the middle beam 21's moment of inertia is (2-3):1, the first edge beam's 22 and second edge beams ' moments of inertia being equal. The moment of area inertia of the first edge beam 22 and the moment of area inertia of the second edge beam are greater than the moment of area inertia of the middle beam 21, so that the bearing capacity of the first edge beam 22 and the bearing capacity of the second edge beam which are made of the same material are greater than the bearing capacity of the middle beam
As shown in fig. 1 and 2, in some embodiments, the main beam 11 is provided with a peg 14 on the upper surface, and the peg 14 extends into the concrete deck 5, so that the concrete deck 5 can be firmly connected with the main beam 1 after the concrete is solidified.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A cast-in-place construction method for a bridge concrete deck slab is characterized in that the bridge comprises a plurality of main beams, the length direction of each main beam is consistent with the length direction of the bridge, the plurality of main beams are arranged at intervals along the width direction of the bridge, and the construction method comprises the following steps:
A) a plurality of middle cross beams which are arranged at intervals along the length direction of the bridge are arranged between two adjacent main beams, the length direction of each middle cross beam is consistent with the width direction of the bridge, one end of each middle cross beam is connected with one of the two corresponding main beams, and the other end of each middle cross beam is connected with the other one of the two corresponding main beams;
B) a plurality of middle purlins which are arranged at intervals along the width direction of the bridge are arranged between every two adjacent main beams, the length direction of each middle purlin is consistent with the length direction of the bridge, and each middle purlin is arranged on the upper surface of at least one part of the corresponding middle cross beams;
C) arranging intermediate templates between every two adjacent main beams, wherein each intermediate template is arranged on the upper surfaces of the corresponding intermediate purlines, and the upper surfaces of the intermediate templates and the upper surfaces of the main beams form a pouring surface; and
D) pouring concrete on the pouring surface to form a concrete bridge deck.
2. The cast-in-place construction method of a bridge concrete deck according to claim 1, wherein the plurality of main beams includes a first edge main beam and a second edge main beam, which are located at both ends of the plurality of main beams in a width direction of the bridge, wherein
In step a), providing a plurality of first edge beams on the first edge girder, each of the first edge beams extending from the first edge girder in a direction away from the second edge girder in a width direction of the bridge, and providing a plurality of second edge beams on the second edge girder, each of the second edge beams extending from the second edge girder in a direction away from the first edge girder in the width direction of the bridge;
in the step B), a plurality of first edge purlins arranged at intervals in the width direction of the bridge are arranged on the upper surfaces of the plurality of first edge cross beams, the length direction of each first edge purlin is consistent with the length direction of the bridge, a plurality of second edge purlins arranged at intervals in the width direction of the bridge are arranged on the upper surfaces of the plurality of second edge cross beams, and the length direction of each second edge is consistent with the length direction of the bridge;
in the step C), a first edge formwork is arranged on the upper surfaces of the first edge purlins, a second edge formwork is arranged on the upper surfaces of the second edge purlins, and the upper surface of the middle formwork, the upper surface of the first edge formwork, the upper surface of the second edge formwork and the upper surfaces of the main beams form the pouring surface.
3. A bridge construction formwork suitable for a cast-in-place construction method of a bridge concrete deck slab is characterized by comprising
The length direction of each main beam is consistent with that of the bridge, and the main beams are arranged at intervals along the width direction of the bridge; and
the middle support frame is arranged between two adjacent main beams and comprises a support frame
The middle cross beams are arranged between two adjacent main beams at intervals along the length direction of the bridge, the length direction of each middle cross beam is consistent with the width direction of the bridge, one end of each middle cross beam is connected with one of the two corresponding main beams, and the other end of each middle cross beam is connected with the other one of the two corresponding main beams;
a plurality of intermediate purlins which are arranged at intervals along the width direction of the bridge are arranged between two adjacent main beams, the length direction of each intermediate purlin is consistent with the length direction of the bridge, and each intermediate purlin is arranged on the upper surface of at least one part of the intermediate cross beams; and
the middle formwork is arranged between every two adjacent main beams, each middle formwork is arranged on the upper surface of the corresponding middle purline, and the upper surface of each middle formwork and the upper surfaces of the corresponding main beams form a pouring surface.
4. The bridge construction formwork of claim 3 wherein the plurality of girders comprises a first edge girder and a second edge girder, the first edge girder and the second edge girder being located at both ends of the plurality of girders in a width direction of the bridge;
the first edge girder is provided with a first edge support frame which comprises
The first edge beam is arranged on the first edge girder at intervals along the length direction of the bridge, and each first edge beam extends from the first edge girder to the direction far away from the second edge girder along the width direction of the bridge;
a plurality of first edge purlins which are arranged at intervals along the width direction of the bridge are arranged on at least one part of the upper surfaces of the plurality of first edge cross beams, and the length direction of each first edge purlin is consistent with the length direction of the bridge; and
the upper surfaces of the first edge purlines are provided with the first edge templates;
the second edge main beam is provided with a second edge support frame, and the second edge support frame comprises
A plurality of second edge cross beams arranged at intervals along the length direction of the bridge are arranged on the second edge main beam, and each second edge cross beam extends from the second edge main beam to the direction far away from the first edge main beam along the width direction of the bridge;
a plurality of second edge purlins which are arranged at intervals along the width direction of the bridge are arranged on the upper surface of at least one part of the second edge cross beams, and the length direction of each second edge is consistent with the length direction of the bridge; and
the upper surfaces of the second edge purlins are provided with the second edge templates, and the upper surface of the middle template, the upper surface of the first edge template, the upper surface of the second edge template and the upper surfaces of the main beams form the pouring surface.
5. The bridge construction formwork of claim 4 wherein the distance between two adjacent intermediate cross beams between two adjacent main girders in the length direction of the bridge is between 0.5m-2m, the distance between two adjacent first edge cross beams in the length direction of the bridge is between 0.5m-2m, and the distance between two adjacent second edge cross beams in the length direction of the bridge is between 0.5m-2 m;
optionally, the distance between two adjacent middle cross beams between two adjacent main beams in the length direction of the bridge is 1m, the distance between two adjacent first edge cross beams in the length direction of the bridge is 1m, and the distance between two adjacent second edge cross beams in the length direction of the bridge is 1 m.
6. The bridge construction formwork of claim 4 wherein a ratio of the bearing capacity of each of the first and second edge beams to the bearing capacity of the middle beam is (3-5): 1;
and/or a ratio of each of a moment of area inertia of the first edge beam and a moment of area inertia of the second edge beam to a moment of area inertia of the middle beam is (2-3): 1.
7. The bridge construction formwork of claim 4, wherein an end of the middle beam is connected to a first stiffening rib on the main beam by a first bolt, an end of the first edge beam and an end of the second edge beam are connected to a second stiffening rib on the main beam by a second bolt, and a ratio of the number of the first bolts connected to each of the first stiffening ribs to the number of the second bolts connected to each of the second stiffening ribs is 1: (3-5).
8. The bridge construction formwork of claim 4 wherein the girders are I-shaped girders, and the upper surfaces of the intermediate formwork, the first edge formwork, and the second edge formwork are on a horizontal plane with the upper surfaces of the upper flanges of the girders.
9. The bridge construction formwork of claim 4, wherein each of the intermediate purlins comprises a plurality of sections of intermediate sub-purlins arranged along the length direction of the bridge, the plurality of sections of intermediate sub-purlins are sequentially connected end to end along the length direction of the bridge, each of the first edge purlins comprises a plurality of sections of first edge sub-purlins arranged along the length direction of the bridge, the plurality of sections of first edge sub-purlins are sequentially connected end to end along the length direction of the bridge, each of the second edge purlins comprises a plurality of sections of second edge sub-purlins arranged along the length direction of the bridge, and the plurality of sections of second edge sub-purlins are sequentially connected end to end along the length direction of the bridge.
10. The bridge construction formwork of claim 3 wherein studs are provided on the upper surface of the main beam.
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| JP2000273826A (en) * | 1999-03-26 | 2000-10-03 | Hitachi Zosen Corp | Bridge floor slab, form used for it and bridge floor slab work execution method |
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| CN114481846B (en) | 2023-05-26 |
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