Prefabricated assembled concrete diaphragm structure and construction method
Technical Field
The invention relates to the technical field of bridges, in particular to a prefabricated assembled concrete diaphragm structure and a construction method.
Background
The diaphragm plate is an important component of transverse connection between the T-shaped beams, and can increase the rigidity of the bridge and ensure that the load is transversely distributed more uniformly. The following problems exist during construction: the transverse partition plate has large size and weight and cannot be transferred to the lower part for installation through the wet seam on the upper part; the workload of steel bar binding at the site joint is large, a template needs to be erected during pouring, a large amount of manual site operation is needed, and the construction risk is high. Therefore, a new diaphragm construction is needed.
Disclosure of Invention
The invention aims to provide a prefabricated concrete diaphragm structure and a construction method thereof.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a prefabricated assembled concrete diaphragm structure which comprises two end diaphragm plates and a plurality of middle diaphragm plates, wherein the end diaphragm plates are positioned on one side of an edge beam and connected with the edge beam through first mounting assemblies, the middle diaphragm plates are positioned on two sides of a middle beam and connected with the middle beam through second mounting assemblies, the edge beam is positioned on two sides of a plurality of middle beams, the edge beam and the middle beam are connected with the middle diaphragm plates through the end diaphragm plates, the adjacent middle beams are connected through the middle diaphragm plates, wet joints are poured at the joints of the end diaphragm plates, the edge beam, the middle diaphragm plates and the middle beam, and wet joints between plates are poured between the adjacent middle diaphragm plates and between the end diaphragm plates and the middle diaphragm plates.
Preferably, the end diaphragm plates and the middle diaphragm plate have the same structure, each of the end diaphragm plates and the middle diaphragm plate is provided with a plurality of layers of transverse ribs parallel to the axial direction of the end diaphragm plate and the middle diaphragm plate and a plurality of longitudinal ribs perpendicular to the transverse ribs, two ends of each transverse rib extend out of the end diaphragm plate or the middle diaphragm plate, the transverse ribs in the end diaphragm plates and the transverse ribs in the adjacent middle diaphragm plates are arranged in a staggered manner, and wet seams between plates are poured at lap joints of the transverse ribs in the end diaphragm plates and the transverse ribs in the adjacent middle diaphragm plates and at lap joints of the transverse ribs in the adjacent middle diaphragm plates.
Preferably, the first mounting assembly is located in a web of the side beam, the first mounting assembly comprises a plurality of side beam steel bar sleeves and side beam connecting steel bars which are matched one by one, one end of each side beam connecting steel bar is arranged in one side beam steel bar sleeve, and the other end of each side beam connecting steel bar extends out of the side beam and is in staggered lap joint with each transverse bar in the adjacent end transverse partition plate;
the plate girder wet joint is poured at the lap joint of the edge girder connecting steel bar and each transverse bar in the adjacent end transverse partition plate, and the plate girder wet joint is fixedly connected with the edge girder and the adjacent end transverse partition plate.
Preferably, the second mounting assembly is located in a web plate of the middle beam, the second mounting assembly comprises a plurality of middle beam steel bar sleeves and middle beam connecting steel bars which are matched one by one, the middle beam steel bar sleeves penetrate through the web plate of the middle beam, the middle beam connecting steel bars penetrate through the middle beam steel bar sleeves, two ends of each middle beam connecting steel bar extend out of the middle beam steel bar sleeves, and the extending end of each middle beam connecting steel bar is in staggered lap joint with each transverse bar in the adjacent middle transverse partition plate;
the plate girder wet joint is poured at the lap joint of the middle girder connecting steel bar and each transverse bar in the adjacent middle transverse clapboard, and the plate girder wet joint is fixedly connected with the middle girder and the adjacent middle transverse clapboard.
Preferably, the telescopic outside of boundary beam reinforcing bar is provided with crooked reinforcing bar, crooked reinforcing bar's cross-section is the L type, crooked reinforcing bar with reinforcing bar in the web of boundary beam with the equal fixed connection of boundary beam reinforcing bar sleeve.
Preferably, the telescopic outside of boundary beam reinforcing bar is provided with sleeve fixed joint, sleeve fixed joint is the tube-shape, sleeve fixed joint's bottom is provided with outer edge, sleeve fixed joint with reinforcing bar in the web of boundary beam with the equal fixed connection of boundary beam reinforcing bar sleeve.
The invention also provides a construction method of the prefabricated concrete diaphragm structure, which comprises the following steps:
the first step is as follows: prefabricating an edge beam, a middle beam, an end diaphragm plate and a middle diaphragm plate, wherein when the edge beam is prefabricated, a bent steel bar or a sleeve fixing joint is welded on an edge beam steel bar sleeve and embedded in an edge beam web plate, when the middle beam is prefabricated, a middle beam steel bar sleeve is embedded in advance, and when the end diaphragm plate and the middle diaphragm plate are prefabricated, a transverse bar, a longitudinal bar and a stirrup are embedded in advance;
the second step: inserting a middle beam connecting steel bar into a middle beam steel bar sleeve, overlapping transverse bars in middle transverse partition plates on two sides of a middle beam with the middle beam connecting steel bar in a staggered manner, pouring a plate beam wet joint, inserting edge beam connecting steel bars into an edge beam steel bar sleeve, overlapping transverse bars in end transverse partition plates on one side of an edge beam with extension ends of the edge beam connecting steel bar in a staggered manner, and pouring a plate beam wet joint;
the third step: and (4) conveying the structure mounted in the second step to a site for assembly, mounting the boundary beams and the middle beams in place, and pouring wet joints between the adjacent middle transverse clapboards.
Compared with the prior art, the invention has the following technical effects:
according to the invention, the end diaphragm plate is connected with the side beam through the first mounting assembly, the middle diaphragm plate is connected with the middle beam through the second mounting assembly, the existing beam-following prefabricated structure is changed into an assembly structure, and the integral mounting and dismounting type is used, so that the site construction operation is simplified, and the storage and transportation stability is ensured. The invention has the advantages of simple manufacture, convenient construction, easy operation, high efficiency and low construction risk.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is an external view of a prefabricated concrete diaphragm structure according to the present invention;
FIG. 2 is a schematic view of the interior of the prefabricated concrete diaphragm structure of the present invention;
FIG. 3 is a schematic view of the arrangement of the first installation assembly, the second installation assembly and the longitudinal steel bars in the present invention;
FIG. 4 is a schematic view of a first mounting assembly of the present invention in connection with a side rail;
FIG. 5 is a schematic view of a second mounting assembly of the present invention coupled to a center sill;
FIG. 6 is a schematic view of the internal structure of the end diaphragms and the middle diaphragms of the present invention;
FIG. 7 is a schematic view of the attachment of the edge beam to the end diaphragms of the present invention;
FIG. 8 is a schematic view of the connection between the center sill and the center diaphragm in the present invention;
FIG. 9 is a first embodiment of the present invention (using bent bars to secure the edge beam sleeve);
FIG. 10 is a second view of the first assembly of the present invention (using the sleeve-retaining connection to secure the edge beam sleeve);
FIG. 11 is a schematic view of a second mounting assembly of the present invention;
wherein: 1-boundary beam, 2-middle beam, 3-end diaphragm plate, 4-plate beam wet joint, 5-inter-plate wet joint, 6-transverse bar, 7-stirrup, 8-boundary beam connecting steel bar, 9-middle beam connecting steel bar, 10-boundary beam steel bar sleeve, 11-middle beam steel bar sleeve, 12-bending steel bar, 13-sleeve fixed joint and 14-middle diaphragm plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of protection of the present invention.
The invention aims to provide a prefabricated concrete diaphragm structure and a construction method thereof.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-9 and 11: the embodiment provides a prefabricated assembled concrete diaphragm structure and a construction method, the prefabricated assembled concrete diaphragm structure comprises two end diaphragms 3 and a plurality of middle diaphragms 14, the end diaphragms 3 are located on one side of an edge beam 1 and connected with the edge beam 1 through first mounting assemblies, the middle diaphragms 14 are located on two sides of a middle beam 2 and connected with the middle beam 2 through second mounting assemblies, the edge beam 1 is located on two sides of the middle beams 2, the edge beam 1 and the middle beam 2 are connected through the end diaphragms 3 and the middle diaphragms 14, adjacent middle beams 2 are connected through the middle diaphragms 14, plate beam joint wet joints 4 are poured at the joints of the end diaphragms 3 and the edge beam 1, the middle diaphragms 14 and the middle beams 2, and plate wet joints 5 are poured between the adjacent middle diaphragms 14 and between the end diaphragms 3 and the middle diaphragms 14.
In this embodiment, the edge beam 1 and the center beam 2 are both T-shaped beams or I-shaped beams.
In this embodiment, the end diaphragm plates 3 and the middle diaphragm plates 14 have the same structure, the end diaphragm plates 3 and the middle diaphragm plates 14 are both of a belt-shaped structure, each of the end diaphragm plates 3 and the middle diaphragm plates 14 is provided with a plurality of layers of longitudinal ribs parallel to the axial transverse ribs 6 of the end diaphragm plates 3 and the axial transverse ribs 6 of the middle diaphragm plates 14 and a plurality of transverse ribs 6 perpendicular to the transverse ribs 6, both ends of each transverse rib 6 extend out of the end diaphragm plate 3 or the middle diaphragm plate 14, the transverse ribs 6 in the end diaphragm plates 3 and the transverse ribs 6 in the adjacent middle diaphragm plates 14 are arranged in a staggered manner, and the lap joints of the transverse ribs 6 in the end diaphragm plates 3 and the transverse ribs 6 in the adjacent middle diaphragm plates 14 and the lap joints of the transverse ribs 6 in the adjacent middle diaphragm plates 14 are all poured with inter-plate wet joints 5. The transverse ribs 6 in the end transverse partition plate 3 and the middle transverse partition plate 14 in the embodiment are two layers, the diameter of the transverse rib 6 at the upper layer is 12mm, and the diameter of the transverse rib 6 at the lower layer is 25 mm. The transverse ribs 6 are connected with the longitudinal ribs through a plurality of stirrups 7.
In the embodiment, the first installation assembly is positioned in a web plate of the boundary beam 1, the first installation assembly comprises a plurality of boundary beam steel bar sleeves 10 and boundary beam connecting steel bars 8 which are matched one by one, one end of each boundary beam connecting steel bar 8 is arranged in each boundary beam steel bar sleeve 10, and the other end of each boundary beam connecting steel bar 8 extends out of the boundary beam 1 and is in staggered lap joint with each transverse bar 6 in the adjacent end transverse partition plate 3; the lap joint of each transverse bar 6 in boundary beam connecting reinforcement 8 and the adjacent end diaphragm plate 3 has been pour the wet seam 4 of plate girder, and the wet seam 4 of plate girder and boundary beam 1 and the equal fixed connection of adjacent end diaphragm plate 3.
In this embodiment, the second mounting assembly is located in a web of the middle beam 2, the second mounting assembly includes a plurality of middle beam steel bar sleeves 11 and middle beam connecting steel bars 9 which are matched one by one, the middle beam steel bar sleeves 11 penetrate through the web of the middle beam 2, the middle beam connecting steel bars 9 penetrate through the middle beam steel bar sleeves 11, two ends of each middle beam connecting steel bar 9 extend out of the middle beam steel bar sleeves 11, and the extending end of each middle beam connecting steel bar 9 is in staggered lap joint with each transverse bar 6 in the adjacent middle transverse partition plate 14; the plate girder wet joint 4 is poured at the lap joint of the middle girder connecting steel bar 9 and each transverse bar 6 in the adjacent middle transverse clapboard 14, and the plate girder wet joint 4 is fixedly connected with the middle girder 2 and the adjacent middle transverse clapboard 14.
In this embodiment, the outside of boundary beam steel bar sleeve 10 is provided with crooked reinforcing bar 12, and the cross-section of crooked reinforcing bar 12 is the L type, and reinforcing bar and the equal fixed connection of boundary beam steel bar sleeve 10 in the web of crooked reinforcing bar 12 and boundary beam 1 specifically, fix through the welding. The bent reinforcing bars 12 serve to enhance the anchoring of the first mounting assembly to the edge beam 1.
The diaphragm plate of the embodiment is assembled instead of being prefabricated along with the beam, the boundary beam connecting steel bars 8 are connected with the web plate of the boundary beam 1 through the boundary beam steel bar sleeves 10, the middle beam connecting steel bars 9 are connected with the web plate of the middle beam 2 through the middle beam steel bar sleeves 11, the whole structure is in an assembling and disassembling mode, and the site construction operation is simplified; the end diaphragm plates 3 and the middle diaphragm plates 14 are in a belt shape, so that the work load of pouring the wet joints 4 of the plate beams and the wet joints 5 between the plates on site is reduced; the transverse ribs 6 of the adjacent middle transverse partition plates 14, the transverse ribs 6 of the end transverse partition plates 3 and the middle transverse partition plates 14, the side beam connecting steel bars 8, the transverse ribs 6 of the end transverse partition plates 3, the middle beam connecting steel bars 9 and the transverse ribs 6 of the middle transverse partition plates 14 are connected in a lap joint mode, no stirrups 7 are arranged in the plate beam wet joints 4 and the inter-plate wet joints 5, and the work of binding the steel bars on site is cancelled; the boundary beam connecting steel bars 8 are anchored in the web plate of the boundary beam 1 through the boundary beam steel bar sleeves 10, and the bent steel bars 12 are welded on the outer sides of the boundary beam steel bar sleeves 10, so that the anchoring force can be increased; the embodiment is installed in the beam factory and then transported to the field for installation, and is more stable in the transportation process.
Example two
The difference between this embodiment and the first embodiment is: as shown in fig. 10, in this embodiment, a sleeve fixing joint 13 is disposed outside the edge beam steel sleeve 10, the sleeve fixing joint 13 is cylindrical, an outer edge is disposed at the bottom of the sleeve fixing joint 13, and the sleeve fixing joint 13 is fixedly connected to both the steel bar in the web of the edge beam 1 and the edge beam steel sleeve 10. The socket attachment fitting 13 serves to enhance the anchorage of the first mounting assembly to the edge beam 1.
EXAMPLE III
The embodiment provides a construction method of the prefabricated assembly type concrete diaphragm structure according to the first embodiment or the second embodiment, which comprises the following steps:
the first step is as follows: prefabricating an edge beam 1, a middle beam 2, an end diaphragm plate 3 and a middle diaphragm plate 14, welding a bent steel bar 12 or a sleeve fixing joint 13 on an edge beam steel bar sleeve 10 and embedding the edge beam steel bar sleeve into a web plate of the edge beam 1 when the edge beam 1 is prefabricated, embedding a middle beam steel bar sleeve 11 when the middle beam 2 is prefabricated, and embedding a transverse bar 6, a longitudinal bar and a stirrup 7 when the end diaphragm plate 3 and the middle diaphragm plate 14 are prefabricated;
the second step is that: inserting a middle beam connecting steel bar 9 into a middle beam steel bar sleeve 11, overlapping transverse bars 6 in middle transverse partition plates 14 on two sides of a middle beam 2 with the middle beam connecting steel bar 9 in a staggered mode and pouring a plate beam wet joint 4, inserting edge beam connecting steel bars 8 into an edge beam steel bar sleeve 10, overlapping the transverse bars 6 in an end transverse partition plate 3 on one side of an edge beam 1 with extending ends of the edge beam connecting steel bars 8 in a staggered mode and pouring the plate beam wet joint 4;
the third step: the structure assembled in the second step is transported to the site for assembly, the edge beams 1 and the middle beams 2 are installed in place, and wet joints 5 between the plates between the adjacent middle diaphragms 14 are poured.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.