CN114481846B - Cast-in-situ construction method of bridge concrete deck and bridge construction formwork - Google Patents
Cast-in-situ construction method of bridge concrete deck and bridge construction formwork Download PDFInfo
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- CN114481846B CN114481846B CN202210110509.6A CN202210110509A CN114481846B CN 114481846 B CN114481846 B CN 114481846B CN 202210110509 A CN202210110509 A CN 202210110509A CN 114481846 B CN114481846 B CN 114481846B
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The invention provides a cast-in-situ construction method of a bridge concrete deck and a bridge construction formwork. The invention discloses a cast-in-situ construction method of a bridge concrete deck, which comprises a plurality of main beams, and 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 purlines are arranged between two adjacent main beams at intervals along the width direction of the bridge, wherein each middle purline is arranged on the upper surface of at least one part of the corresponding plurality of middle cross beams; c) An intermediate template is arranged between two adjacent main beams, and the upper surface of the intermediate template and the upper surfaces of the main beams form a pouring surface; and D) casting concrete on the casting surface so as to form a concrete bridge deck. Therefore, the cast-in-situ construction method of the bridge concrete deck plate has the advantages of accelerating construction speed, reducing construction cost and being convenient for forming the concrete deck plate.
Description
Technical Field
The invention relates to the technical field of bridges, in particular to a cast-in-situ construction method of a bridge concrete deck and a bridge construction formwork.
Background
In the related art, a template is required to be arranged during construction of a cast-in-place concrete bridge deck, and then concrete is cast on the template in situ. The full cast-in-place concrete bridge deck has good integrity, can easily meet the section requirements of various bridge decks, but has large template engineering quantity and site wet operation quantity and slower construction speed. When the template can not be supported by the steel beam completely, the full-hall floor scaffold is required to be arranged, the construction cost is high, and the influence on the surrounding environment is large.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the invention provides a cast-in-situ construction method of a bridge concrete deck and a bridge construction formwork.
The invention discloses a cast-in-situ construction method of a bridge concrete deck, which comprises a plurality of girders, wherein the length direction of each girder is consistent with the length direction of the bridge, and the girders 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 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 of the two corresponding main beams;
b) A plurality of middle purlines are arranged between two adjacent main beams at intervals along the width direction of the bridge, the length direction of each middle purline is consistent with the length direction of the bridge, and each middle purline is arranged on the upper surface of at least one part of the corresponding plurality of middle cross beams;
c) An intermediate template is arranged between two adjacent main beams, each intermediate template is arranged on the upper surfaces of a plurality of 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) Concrete is poured onto the pouring face to form a concrete deck.
Therefore, the cast-in-situ construction method of the bridge concrete deck plate has the advantages of accelerating construction speed, reducing construction cost and being convenient for forming the concrete deck plate.
In some embodiments, 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, wherein
In the step a), a plurality of first edge beams are provided on the first edge main beams, each of the first edge beams extending in a direction away from the second edge main beam from the first edge main beam in a width direction of the bridge, and a plurality of second edge beams are provided on the second edge main beams, each of the second edge beams extending in a direction away from the first edge main beam from the second edge main beam in a width direction of the bridge;
in the step B), a plurality of first edge purlins are arranged on the upper surfaces of the plurality of first edge beams at intervals along the width direction of the bridge, the length direction of each first edge purlin is consistent with the length direction of the bridge, a plurality of second edge purlins are arranged on the upper surfaces of the plurality of second edge beams at intervals along the width direction of the bridge, and the length direction of each second edge is consistent with the length direction of the bridge;
in the step C), a first edge template is disposed on the upper surfaces of the plurality of first edge purlins, a second edge template is disposed on the upper surfaces of the plurality of second edge purlins, and the upper surfaces of the intermediate templates, the upper surfaces of the first edge templates, the upper surfaces of the second edge templates, and the upper surfaces of the plurality of main beams form the casting surface.
The invention also provides a bridge construction formwork suitable for the cast-in-situ construction method of the bridge concrete deck, which comprises
The length direction of each girder is consistent with the length direction of the bridge, and the girders are arranged at intervals along the width direction of the bridge; and
the middle supporting frame is arranged between two adjacent main beams, and each supporting frame comprises
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 of the two corresponding main beams;
a plurality of middle purlines are arranged between two adjacent main beams at intervals along the width direction of the bridge, the length direction of each middle purline is consistent with the length direction of the bridge, and each middle purline is arranged on the upper surface of at least one part of the plurality of middle cross beams; and
and an intermediate template is arranged between two adjacent main beams, each intermediate template is provided with a plurality of intermediate purlines on the upper surface, and the upper surface of the intermediate template and the upper surfaces of the main beams form a pouring surface.
In some embodiments, 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 main beam is provided with a first edge support frame, and the first edge support frame comprises
The first edge girders are provided with a plurality of first edge girders which are arranged at intervals along the length direction of the bridge, and each first edge girder extends from the first edge girders to a direction away from the second edge girders along the width direction of the bridge;
the upper surfaces of at least one part of the plurality of first edge beams are provided with a plurality of first edge purlins which are arranged at intervals along the width direction of the bridge, and the length direction of each first edge purlin is consistent with the length direction of the bridge; and
the upper surfaces of the plurality of first edge purlins are provided with the first edge templates;
the second edge girder is provided with a second edge supporting frame, and the second edge supporting frame comprises
The second edge girders are provided with a plurality of second edge girders which are arranged at intervals along the length direction of the bridge, and each second edge girder extends from the second edge girders to a direction away from the first edge girders along the width direction of the bridge;
the upper surfaces of at least one part of the plurality of second edge beams are provided with a plurality of second edge purlines which are arranged at intervals along the width direction of the bridge, and the length direction of each second edge is consistent with the length direction of the bridge; and
and the upper surfaces of the second edge templates, the upper surfaces of the second edge templates and the upper surfaces of the girders form the pouring surface.
In some embodiments, the distance between two adjacent intermediate beams between two adjacent main beams in the length direction of the bridge is between 0.5m and 2m, the distance between two adjacent first edge beams in the length direction of the bridge is between 0.5m and 2m, and the distance between two adjacent second edge beams in the length direction of the bridge is between 0.5m and 2 m;
optionally, the distance between two adjacent intermediate beams between two adjacent main beams in the length direction of the bridge is 1m, the distance between two adjacent first edge beams in the length direction of the bridge is 1m, and the distance between two adjacent second edge beams in the length direction of the bridge is 1m.
In some embodiments, the ratio of the load bearing capacity of each of the first and second edge beams to the load bearing capacity of the intermediate beam is (3-5): 1;
and/or the ratio of each of the cross-sectional moment of inertia of the first edge beam and the cross-sectional moment of inertia of the second edge beam to the cross-sectional moment of inertia of the intermediate beam is (2-3): 1.
In some embodiments, the ends of the intermediate beam are connected to first stiffening ribs on the main beam by first bolts, the ends of the first edge beam and the ends of the second edge beam are connected to second stiffening ribs on the main beam by second bolts, and the ratio of the number of first bolts connected to each first stiffening rib to the number of second bolts connected to each second stiffening rib is 1: (3-5).
In some embodiments, the main beam is an i-shaped main beam, and the upper surfaces of the intermediate die plate, the first edge die plate, and the second edge die plate are on a horizontal plane with the upper surface of the upper wing plate of the main beam.
In some embodiments, each intermediate purlin includes a plurality of intermediate purlins arranged along a length direction of the bridge, the plurality of intermediate purlins are connected end to end in sequence along the length direction of the bridge, each first edge purlin includes a plurality of first edge purlins arranged along the length direction of the bridge, the plurality of first edge purlins are connected end to end in sequence along the length direction of the bridge, each second edge purlin includes a plurality of second edge purlins arranged along the length direction of the bridge, and the plurality of second edge purlins are connected end to end in sequence along the length direction of the bridge.
In some embodiments, the upper surface of the main beam is provided with pegs.
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:
the 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 and a bolt 14;
a middle beam 21, a first edge beam 22;
an intermediate purlin 31, a first edge purlin 32;
an intermediate template 41, a first edge template 42;
a 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 by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The cast-in-situ construction method of the bridge concrete deck according to the embodiment of the invention is described below with reference to the accompanying drawings. According to the embodiment of the invention, the cast-in-situ construction method of the bridge concrete deck is provided.
The bridge comprises a plurality of main beams 1, the length direction of each main beam 1 is consistent with the length direction of the bridge, the plurality of main beams 1 are arranged at intervals along the width direction of the bridge, and the cast-in-situ construction method comprises the following steps:
a) A plurality of intermediate 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 intermediate cross beam 21 is identical to the width direction of the bridge. Wherein one end of each intermediate beam 21 is connected to one of the respective two main beams 1, and the other end of each intermediate beam 21 is connected to the other of the respective two main beams 1.
B) A plurality of middle purlines 31 are arranged between two adjacent main beams 1 at intervals along the width direction of the bridge, and the length direction of each middle purline 31 is consistent with the length direction of the bridge. Wherein each intermediate purlin 31 is disposed on an upper surface of at least a portion of a corresponding plurality of intermediate beams 21.
C) An intermediate form 41 is disposed between two adjacent main beams 1, each intermediate form 41 being disposed on an upper surface of a corresponding plurality of intermediate purlines 31, the upper surfaces of the intermediate forms 41 and the upper surfaces of the plurality of main beams 1 constituting a casting surface.
D) Concrete is poured on the pouring face to form a concrete deck 5.
The cast-in-situ construction method of the bridge concrete deck slab according to the embodiment of the invention is characterized in that a plurality of middle cross beams 21 are arranged between main beams 1 at intervals, and a plurality of middle purlines 31 are arranged on the plurality of middle cross beams 21. The direction of the interval arrangement of the intermediate beams 21 is perpendicular to the direction of the interval arrangement of the intermediate purlines 31, and the longitudinal direction of the intermediate beams 21 is perpendicular to the longitudinal direction of the intermediate purlines 31. Whereby a plurality of intermediate purlins 31 cooperate with a plurality of intermediate beams 21 and carry intermediate forms 41.
The middle purlines 31 have low cost, can bear the pressure of the middle templates 41 and uniformly transfer the pressure to the joints of the two ends of the middle cross beams 21 and the main beams 1, so that the middle templates 41 can be effectively supported by matching the middle purlines 31 with the middle cross beams 21, the middle templates 41 can be supported without erecting a full scaffold, the construction speed can be increased, the construction cost can be reduced, traffic under a bridge is not hindered, collapse of the middle templates 41 caused when concrete is poured on the middle templates 41 can be prevented, and the concrete bridge deck 5 can be conveniently formed.
Therefore, the cast-in-place construction method of the bridge concrete deck according to the embodiment of the invention has the advantages of accelerating the construction speed, reducing the construction cost and facilitating the formation of the concrete deck 5.
The invention further provides a bridge construction formwork 100 suitable for the cast-in-situ construction method of the bridge concrete deck according to the embodiment of the invention, and the cast-in-situ construction method of the bridge concrete deck according to the embodiment of the invention is specifically described below in conjunction with the bridge construction formwork 100 according to the embodiment of the invention.
As shown in fig. 1 and 2, the bridge construction formwork 100 according to the embodiment of the present invention includes a plurality of main beams 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 a plurality of girders 1 are arranged at intervals along the width direction of the bridge. The plurality of girders 1 includes a first edge girder 11 and a second edge girder, and the first edge girder 11 and the second edge girder are located at both ends of the plurality of girders 1 in the width direction of the bridge. That is, the girders 1 located at the outermost ends in the width direction of the bridge among the plurality of girders 1 constitute a first edge girder 11 and a second edge girder, respectively. Specifically, the length of the main girder 1 coincides with the length of the bridge. For ease of understanding, the following description will be specifically made 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 as indicated by arrow B in fig. 1 and 2.
For example, the length direction of the girders 1 is the front-rear direction, the plurality of girders 1 are arranged at intervals in the left-right direction, the first edge girders 11 are located at the rightmost side of the plurality of girders 1, and the second edge girders are located at the leftmost side of the plurality of girders 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 form 41. The first edge girder 11 is provided with a first edge support frame including a first edge girder 22, a first edge purlin 32 and a first edge formwork 42. The second edge girder is provided with a second edge supporting frame, and the second edge supporting frame comprises a second edge cross beam, a second edge purline and a second edge template.
The length direction of each intermediate beam 21, the length direction of each first edge beam 22, and the length direction of each second edge beam are all identical to 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 intermediate beam 21.
A plurality of middle cross beams 21 are arranged between two adjacent main beams 1 at intervals along the length direction of the bridge. Wherein one end of each intermediate beam 21 is connected to one of the respective two main beams 1, and the other end of each intermediate 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 to and on both sides of the intermediate beam 21. That is, a plurality of intermediate beams 21 are provided between any adjacent two of the main beams 1 at intervals along the length direction of the bridge, so that an intermediate beam support frame composed of a plurality of intermediate beams 21 is provided between any adjacent two of the main beams 1, and each intermediate beam support frame is connected with the corresponding two main beams 1 to provide a supporting force to the intermediate form 41.
The first edge girder 11 is provided with a plurality of first edge girders 22 arranged at intervals along the length direction of the bridge, and each first edge girder 22 extends from the first edge girder 11 to a direction away from the second edge girder along the width direction of the bridge. Specifically, one end of the first edge beam 22 is disposed on the first edge main beam 11, and the other end (far from the second edge main beam) of the first edge beam 22 is suspended. The provision of a plurality of first edge beams 22 on the first edge main beam 11 may result in the first edge main beam 11 being provided with a first edge beam support frame made up of a plurality of first edge beams 22, which first edge beam support frame is connected to the first edge main beam 11 for providing support to the first edge formwork 42.
The second edge girders are provided with a plurality of second edge girders arranged at intervals along the length direction of the bridge, and each second edge girder extends from the second edge girder to a direction away from the first edge girder 11 along the width direction of the bridge. Specifically, one end of the second edge beam is arranged on the second edge main beam, and the other end (far away from the first edge main beam 11) of the second edge beam is arranged in a suspended manner. The second edge girder is provided with a plurality of second edge girders, so that the second edge girder is provided with a second edge girder supporting frame formed by a plurality of second edge girders, and the second edge girder supporting frame is connected with the second edge girder so as to provide supporting force for the second edge template.
For example, the longitudinal direction of the plurality of intermediate beams 21, the longitudinal direction of the plurality of first edge beams 22, and the longitudinal direction of the plurality of second edge beams are all right-left 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 part of each first edge cross beam 22 is connected with the first edge main beam 11, and the right end part of each first edge cross beam 22 is arranged in a suspending way; 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 suspended. The plurality of intermediate cross members 21 located between the respective two main beams 1 are disposed at intervals in the front-rear direction, the plurality of first edge cross members 22 are disposed at intervals in the front-rear direction, and the plurality of second edge cross members are disposed at intervals in the front-rear direction.
In some embodiments, the distance between two adjacent intermediate beams 21 between two adjacent main beams 1 in the length direction of the bridge is between 0.5m and 2m, the distance between two adjacent first edge beams 22 in the length direction of the bridge is between 0.5m and 2m, and the distance between two adjacent second edge beams in the length direction of the bridge is between 0.5m and 2 m. Thus, a distance of 0.5m-2m may make the supporting force of the supporting frame formed by each of the intermediate beam 21, the first edge beam 22, and the second edge beam larger. The smaller the distance between the cross beams in the length direction of the bridge is, the larger the supporting force of the formed bracket is; the larger the distance between the cross beams in the length direction of the bridge is, the less materials are used and the engineering amount is small.
Alternatively, the adjacent two intermediate beams 21 between the adjacent two main beams 1 are spaced apart by 1m in the length direction of the bridge, the adjacent two first edge beams 22 are spaced apart by 1m in the length direction of the bridge, and the adjacent two second edge beams are spaced apart by 1m in the length direction of the bridge. 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 identical to the length direction of the bridge.
A plurality of intermediate purlines 31 are provided between adjacent two main beams 1 at intervals in the width direction of the bridge, wherein each intermediate purline 31 is provided on an upper surface of at least a part of the corresponding plurality of intermediate cross beams 21. And an intermediate form 41 is provided between two adjacent girders 1, each intermediate form 41 being provided on the upper surface of a corresponding plurality of intermediate purlins 31. The corresponding plurality of intermediate purlins 31 refers to a plurality of intermediate purlins 31 located between two adjacent girders 1 that are identical to the intermediate form 41. That is, the plurality of intermediate purlins 31 are located between the intermediate form 41 and the plurality of intermediate beams 21 (intermediate beam supports) in the up-down direction. The plurality of intermediate purlins 31 are in contact with the intermediate form 41, thereby causing the pressure of the intermediate form 41 to be dispersed to the plurality of intermediate beams 21 (intermediate beam supports) by the corresponding plurality of intermediate purlins 31 so as to prevent collapse of the concrete on the intermediate form 41.
A plurality of first edge purlins 32 are provided on an upper surface of at least a part of the plurality of first edge beams 22, the first edge purlins 32 being arranged at intervals in the width direction of the bridge, and a first edge form 42 is provided on an upper surface of the plurality of first edge purlins 32. The pressure of the first edge form 42 is thereby distributed across the plurality of first edge beams 22 (first edge beam support frames) by the plurality of first edge purlins 32 to prevent collapse of the first edge form 42.
A plurality of second edge purlines are arranged on the upper surface of at least one part of the plurality of second edge beams at intervals along the width direction of the bridge, and a second edge template is arranged on the upper surface of the plurality of second edge purlines. The pressure of the second edge form can thereby be distributed to a plurality of second edge beams (second edge beam supports) by the second edge purlins to prevent collapse of the concrete on the second edge beams.
The distance between two adjacent middle purlines 31 between two adjacent main beams 1 in the width direction of the bridge is between 0.3m and 0.6m, the distance between two adjacent first edge purlines 32 in the width direction of the bridge is between 0.3m and 0.6m, and the distance between two adjacent second edge purlines in the width direction of the bridge is between 0.3m and 0.6 m.
For example, 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 front-to-back directions. The plurality of middle purlines 31 between the adjacent two main beams 1 are arranged at intervals in the left-right direction, the plurality of first edge purlines 32 are arranged at intervals in the left-right direction, and the plurality of second edge purlines are arranged at intervals in 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 aligned along the length of the bridge, the plurality of intermediate sub-purlins being connected end-to-end in sequence along the length of the bridge. I.e., two sections of intermediate purlins opposing each other in the length direction of the bridge are gapless, so that the contact area of each intermediate purlin 31 with the intermediate form 41 is larger, in order to better distribute the pressure of the intermediate form 41. Specifically, two sections of middle sub-purlines opposite in the length direction of the bridge can abut against each other. Alternatively, two intermediate sub-purlins opposing each other in the length direction of the bridge are fixed together by a connector so that each intermediate purlin 31 is more stable.
Each first edge purlin 32 includes a plurality of first edge sub-purlins aligned along the length of the bridge, the plurality of first edge sub-purlins being connected end-to-end in sequence along the length of the bridge. I.e., two sections of first edge sub-purlins opposing each other in the length direction of the bridge are void-free, thereby allowing a greater contact area between each first edge purlin 32 and the first edge form 42 to better distribute the pressure of the first edge form 42. Specifically, two sections of first edge sub-purlines opposite in the length direction of the bridge can abut against each other. Alternatively, two sections 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 purline comprises a plurality of sections of second edge sub-purlines which are arranged along the length direction of the bridge, and the sections of second edge sub-purlines are sequentially connected end to end along the length direction of the bridge. The two sections of second edge sub purlines which are opposite in the length direction of the bridge are gapless, so that the contact area between each second edge purline and the second edge template is larger, and the pressure of the second edge template is better shared. In particular, two sections of second edge sub purlins opposite in the length direction of the bridge can abut against each other. Or two sections of second edge sub purlins which are opposite in the length direction of the bridge are fixed together through connecting pieces, 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 intermediate form 41, the first edge form 42, and the second edge form are connected to the upper flanges of the respective main beams 1. The upper surface of the intermediate form 41, the upper surface of the first edge form 42 and the upper surface of the second edge form are on the same horizontal plane as the upper surface of the upper wing plate of the main girder 1. So that the upper surfaces of the intermediate form 41, the upper surfaces of the first edge form 42, the upper surfaces of the second edge form and the upper surfaces of the plurality of girders 1 form a casting surface on which concrete is cast to form the concrete bridge deck 5.
The connection of the intermediate formwork 41, the first edge formwork 42 and the second edge formwork with the upper flanges of the respective girders 1 comprises: a. the middle template 41, the first edge template 42 and the second edge template are abutted against the upper wing plates of the corresponding main beams 1; b. the intermediate form 41, the first edge form 42 and the second edge form are connected with the upper wing plates of the corresponding main beams 1 by fixing pieces, so that the intermediate form 41, the first edge form 42 and the second edge form are connected with the upper wing plates of the corresponding main beams 1 more firmly.
As shown in fig. 1 and 2, in some implementations, the web of the main beam 1 is provided with stiffening ribs, in particular, the main beam 1 is provided with a first stiffening rib 101 connected to the intermediate beam 21, and the main beam 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 purline and the template are connected through bolts in sequence.
Specifically, the end of the middle cross beam 21 is connected to the first stiffening rib 101 on the main beam 1 by the first bolt 12, and the end of the first edge cross beam 22 and the end of the second edge cross beam are connected to the second stiffening rib 111 on the main beam 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 end of the first edge beam 22 and the end of the second edge beam connection can be made more secure to the main beam 1.
In some embodiments, the ratio of the load bearing capacity of the first edge beam 22 to the load bearing capacity of the second edge beam to the load bearing capacity of the intermediate beam is (3-5): 1, with the load bearing capacity of the first edge beam 22 and the load bearing capacity of the second edge beam being equal. Thus, the bearing capacity of the first edge beam 22 and the bearing capacity of the second edge beam being greater than the bearing capacity of the middle beam can enable the first edge beam 22 to better support the first edge formwork 42, preventing concrete on the first edge formwork 42 from crushing the first edge beam 22; the second edge beam can better support the second edge template, and concrete on the second edge template is prevented from crushing the second edge beam.
In some embodiments, the ratio of each of the first and second edge beams '22 cross-sectional moments of inertia to the intermediate beam 21 cross-sectional moment of inertia is (2-3) 1, with the first and second edge beams' 22 cross-sectional moments of inertia being equal. The moment of area of the first edge beam 22 and the moment of area of the second edge beam are greater than the moment of area 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 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 upper surface of the girder is provided with pegs 14, the pegs 14 extending into the concrete deck 5, thereby securing the concrete deck 5 to the girder 1 after the concrete is set.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (7)
1. The cast-in-situ construction method for the concrete bridge deck of the bridge is characterized in that the bridge comprises a plurality of girders, the length direction of each girder is consistent with the length direction of the bridge, and the girders 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 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, the other end of each middle cross beam is connected with the other of the two corresponding main beams, the plurality of main beams comprise a first edge main beam and a second edge main beam, the first edge main beam and the second edge main beam are positioned at two ends of the plurality of main beams in the width direction of the bridge, a plurality of first edge cross beams are arranged on the first edge main beams, one end of each first edge cross beam is arranged on the first edge main beam, the other end of each first edge cross beam is arranged in a suspending manner, a plurality of second edge cross beams are arranged on the second edge main beam, one end of each second edge cross beam is arranged on the second edge main beam, and the other end of each second edge cross beam is arranged in a suspending manner;
b) A plurality of middle purlins are arranged between two adjacent main beams at intervals along the width direction of the bridge, the length direction of each middle purlin is consistent with the length direction of the bridge, each middle purlin is arranged on the upper surface of at least one part of a corresponding plurality of middle cross beams, a plurality of first edge purlins are arranged on the upper surface of a plurality of first edge cross beams at intervals along the width direction of the bridge, the length direction of each first edge purlin is consistent with the length direction of the bridge, a plurality of second edge purlins are arranged on the upper surface of a plurality of second edge cross beams at intervals along the width direction of the bridge, and the length direction of each second edge is consistent with the length direction of the bridge;
c) Setting an intermediate template between two adjacent main beams, wherein each intermediate template is arranged on the upper surfaces of a plurality of corresponding intermediate purlines, the upper surfaces of the intermediate templates and the upper surfaces of the plurality of main beams form a pouring surface, a first edge template is arranged on the upper surfaces of a plurality of first edge purlines, a second edge template is arranged on the upper surfaces of a plurality of second edge purlines, and the upper surfaces of the intermediate templates, the upper surfaces of the first edge templates, the upper surfaces of the second edge templates and the upper surfaces of the plurality of main beams form the pouring surface; and
d) Casting concrete on the casting surface so as to form a concrete bridge deck;
bridge construction formwork suitable for the cast-in-situ construction method of the bridge concrete deck comprises the following steps:
the length direction of each girder is consistent with the length direction of the bridge, and the girders are arranged at intervals along the width direction of the bridge;
the middle support frames are arranged between two adjacent main beams, each middle support frame comprises a middle cross beam and a middle template, a plurality of middle cross beams which are arranged at intervals along the length direction of the bridge are arranged between the 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 of the two corresponding main beams; a plurality of middle purlines are arranged between two adjacent main beams at intervals along the width direction of the bridge, the length direction of each middle purline is consistent with the length direction of the bridge, and each middle purline is arranged on the upper surface of at least one part of the plurality of middle cross beams; the middle templates are arranged between two adjacent main beams, each middle template is arranged on the upper surfaces of a plurality of middle purlines, and the upper surfaces of the middle templates and the upper surfaces of a plurality of main beams form a pouring surface;
the plurality of main beams comprise a first edge main beam and a second edge main beam, and the first edge main beam and the second edge main beam are positioned at two ends of the plurality of main beams in the width direction of the bridge;
the first edge girder is provided with a first edge support frame, the first edge support frame comprises a first edge cross beam, a first edge purline and a first edge template, the first edge main beam is provided with a plurality of first edge cross beams which are arranged at intervals along the length direction of the bridge, and each first edge cross beam extends from the first edge main beam to a direction far away from the second edge main beam along the width direction of the bridge; a plurality of first edge purlines are arranged on the upper surface of at least one part of the plurality of first edge beams at intervals along the width direction of the bridge, and the length direction of each first edge purline is consistent with the length direction of the bridge; the upper surfaces of the plurality of first edge purlins are provided with the first edge templates;
the second edge girder is provided with a second edge supporting frame, the second edge supporting frame comprises a second edge cross beam, a second edge purline and a second edge template, the second edge girder is provided with a plurality of second edge cross beams which are arranged at intervals along the length direction of the bridge, and each second edge cross beam extends from the second edge girder to a direction away from the first edge girder along the width direction of the bridge; a plurality of second edge purlines 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 plurality of second edge cross beams, and the length direction of each second edge is consistent with the length direction of the bridge; the upper surfaces of the second edge purlines are provided with the second edge templates, wherein the upper surfaces of the middle templates, the upper surfaces of the first edge templates, the upper surfaces of the second edge templates and the upper surfaces of the main beams form the pouring surface.
2. The method for cast-in-situ construction of a bridge concrete deck according to claim 1, wherein the distance between two adjacent intermediate beams between two adjacent main beams in the length direction of the bridge is between 0.5m and 2m, the distance between two adjacent first edge beams in the length direction of the bridge is between 0.5m and 2m, and the distance between two adjacent second edge beams in the length direction of the bridge is between 0.5m and 2 m;
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 1m.
3. The method according to claim 1, wherein the ratio of the bearing capacity of each of the first and second edge beams to the bearing capacity of the intermediate beam is (3-5): 1;
and/or the ratio of each of the cross-sectional moment of inertia of the first edge beam and the cross-sectional moment of inertia of the second edge beam to the cross-sectional moment of inertia of the intermediate beam is (2-3): 1.
4. The method according to claim 1, wherein the end of the intermediate beam is connected to a first stiffener on the main beam by a first bolt, the end of the first edge beam and the end of the second edge beam are connected to a second stiffener on the main beam by a second bolt, and the ratio of the number of the first bolts connected to each first stiffener to the number of the second bolts connected to each second stiffener is 1: (3-5).
5. The method of claim 1, wherein the girder is an i-girder, and the upper surfaces of the intermediate form, the first edge form, and the second edge form are on a horizontal plane with the upper surface of the upper wing plate of the girder.
6. The method of claim 1, wherein each of the intermediate purlins comprises a plurality of intermediate sub-purlins arranged along a length direction of the bridge, the plurality 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 first edge sub-purlins arranged along the length direction of the bridge, the plurality 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 second edge sub-purlins arranged along the length direction of the bridge, and the plurality of second edge sub-purlins are sequentially connected end to end along the length direction of the bridge.
7. The method for cast-in-situ construction of a concrete deck for a bridge according to claim 1, wherein the upper surface of the girder is provided with pegs.
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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 |
| CN204919356U (en) * | 2015-08-27 | 2015-12-30 | 中铁十五局集团有限公司 | Mould platform is hung in construction of steel longeron concrete bridge panel |
| CN107761571A (en) * | 2017-10-30 | 2018-03-06 | 中铁二十四局集团安徽工程有限公司 | Needle beam combined steel plate beam bridge panel cast-in-place construction sliding form frame system and its application |
| CN111441244A (en) * | 2020-04-17 | 2020-07-24 | 中交二公局第二工程有限公司 | Steel-concrete composite beam concrete bridge deck construction support and construction method thereof |
| CN214194162U (en) * | 2020-12-22 | 2021-09-14 | 中国水利水电第三工程局有限公司 | Supporting structure for construction of bridge deck of steel-concrete composite beam |
| CN113123502B (en) * | 2021-04-08 | 2022-12-02 | 安徽中擎住宅工业发展有限公司 | Prefabricated assembled occlusion steel plate light floor set for building engineering |
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