CN219547534U - Prefabricated assembled corrugated steel web continuous box girder bridge - Google Patents
Prefabricated assembled corrugated steel web continuous box girder bridge Download PDFInfo
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- CN219547534U CN219547534U CN202320008082.9U CN202320008082U CN219547534U CN 219547534 U CN219547534 U CN 219547534U CN 202320008082 U CN202320008082 U CN 202320008082U CN 219547534 U CN219547534 U CN 219547534U
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A30/60—Planning or developing urban green infrastructure
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Abstract
The utility model provides a prefabricated assembled corrugated steel web continuous box girder bridge, which comprises a top plate and a bottom frame arranged below the top plate, wherein the bottom frame is of a U-shaped structure, and both ends of the bottom frame are connected with the top plate; the chassis comprises a left section and a right section, the left section and the right section are of L-shaped structures, the horizontal ends of the left section and the right section are connected with each other, and the vertical ends of the left section and the right section are connected with the top plate. The prefabricated assembled corrugated steel web continuous box girder bridge is formed by adopting the prefabricated sections and the top plate, has a simple structure, is easy to construct and assemble, is beneficial to accelerating the site construction progress and reduces complicated site construction steps.
Description
Technical Field
The utility model belongs to the field of bridges, and particularly relates to a prefabricated assembled corrugated steel web continuous box girder bridge.
Background
The corrugated steel web continuous box girder bridge is a novel steel-concrete combined structure, and adopts steel webs to replace concrete webs, and has the advantages of light dead weight, good shock resistance, simple construction, good durability and the like. The corrugated steel web box girder bridge is usually constructed by adopting a construction method of cast-in-situ bracket construction or cantilever casting of the traditional concrete bridge. When the cantilever casting of the corrugated steel web box girder bridge adopts the cast-in-situ construction of the bracket, a large number of temporary structures of the bracket are needed, the measure cost and the labor investment are greatly increased along with the height of the bridge, the corrugated steel web box girder bridge cannot be used when crossing valleys and rivers, and certain limitation exists, and when the cantilever casting construction is adopted, the hanging basket is complicated to install in the construction process, the economic cost is high, and the construction period is long, so that the problem needs to be solved.
Disclosure of Invention
In view of the above, the utility model aims to provide a prefabricated assembled corrugated steel web continuous box girder bridge, which is used for reducing the construction time at high altitude and reducing the construction risk.
In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:
the utility model provides a prefabricated assembled corrugated steel web continuous box girder bridge, which comprises a top plate and a bottom frame arranged below the top plate, wherein the bottom frame is of a U-shaped structure, and both ends of the bottom frame are connected with the top plate; the chassis comprises a left section and a right section, the left section and the right section are of L-shaped structures, the horizontal ends of the left section and the right section are connected with each other, and the vertical ends of the left section and the right section are connected with the top plate.
Furthermore, the horizontal ends of the left section and the right section are made of reinforced concrete, and the vertical ends are made of corrugated steel webs.
Further, grooves are formed in the positions, corresponding to the vertical ends of the left section and the right section, of the top plate, at least two through holes are formed in the position, corresponding to the grooves, of the top plate at intervals, and each through hole is communicated with the corresponding groove.
Further, the vertical ends of the left section and the right section are respectively provided with an end plate for blocking the opening of the groove.
Further, a plurality of shear nails are arranged on the end plate at intervals, and each shear nail is vertically arranged on the end plate.
Compared with the prior art, the prefabricated assembled corrugated steel web continuous box girder bridge has the following advantages:
the utility model provides a prefabricated assembled corrugated steel web continuous box girder bridge, which is formed by prefabricated sections and a top plate, has a simple structure, is easy to construct and assemble, is beneficial to accelerating the site construction progress and reduces complicated site construction steps. In addition, the box girder bridge also has good structural strength and stability, the vertical ends of the sections are manufactured by adopting the corrugated steel webs, the end plates and the shear nails are arranged at the vertical ends of the sections, the end plates can stably support the top plates under the stable support of the corrugated steel webs, and the shear nails on the end plates can effectively improve the structural strength of the joints of the top plates and the vertical ends of the sections after being combined with concrete.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:
FIG. 1 is a schematic structural view of a prefabricated corrugated steel web continuous box girder bridge according to an embodiment of the present utility model;
FIG. 2 is a schematic view of a segment of a continuous box girder bridge with prefabricated assembled corrugated steel webs according to an embodiment of the present utility model;
FIG. 3 is a flow chart of a method for constructing a prefabricated corrugated steel web continuous box girder bridge according to a second embodiment of the present utility model;
fig. 4 is a schematic diagram of a segment hoisting construction in a prefabricated assembled corrugated steel web continuous box girder bridge construction method according to a second embodiment of the present utility model.
Reference numerals illustrate:
1. a chassis; 2. a top plate; 3. an end plate; 4. shear nails; 5. and a through hole.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
Example 1
Fig. 1 is a schematic structural view of a prefabricated assembled corrugated steel web continuous box girder bridge according to an embodiment of the present utility model, referring to fig. 1, the box girder bridge includes a top plate 2 and a bottom frame 1 disposed below the top plate 2, the bottom frame 1 has a U-shaped structure, and two ends of the bottom frame 1 are connected with the top plate 2; the underframe 1 comprises a left section and a right section, the left section and the right section are of L-shaped structures, the horizontal ends of the left section and the right section are connected with each other, and the vertical ends of the left section and the right section are connected with the top plate 2.
Optionally, the horizontal ends of the left section and the right section are made of reinforced concrete, and the vertical ends are made of corrugated steel webs. The section is formed by a corrugated steel web and a half concrete bottom plate, one end of the half concrete bottom plate is spliced with the corrugated steel web to form an L-shaped section when in prefabrication, the other end of the half concrete bottom plate is reserved with a section steel and wet joint, and the bottom plate of the subsequent section is connected with the bottom plate of the other section in construction. The thickness of the half concrete bottom plate is only half of the bottom plate of the complete bottom plate 1, and the width of the half concrete bottom plate is only half of the bottom plate of the complete bottom plate 1.
In the practical application process, in order to realize the connection between chassis 1 and roof 2, the position that corresponds left segment and right segment vertical end on the roof 2 is equipped with the recess, and the position interval that corresponds the recess on the roof 2 is equipped with two at least through-holes 5, and each through-hole 5 all communicates with the recess. The through holes 5 are disposed at the connection positions of the top plate 2 and the bottom frame 1, and a person skilled in the art can adjust the size and the number of the through holes 5 according to actual needs, which is not described herein. In the actual construction process, the groove can be used for accommodating concrete, and the through holes 5 can be used for facilitating construction staff to pour concrete to the joint of the top plate 2 and the underframe 1, and by arranging a plurality of through holes 5, the pouring efficiency of the concrete is improved, the pouring uniformity is improved, the structural strength and the stability of the joint of the top plate 2 and the underframe 1 are improved, and the overall safety of the box girder bridge is further improved.
Optionally, vertical ends of the left segment and the right segment are respectively provided with an end plate 3 for blocking the opening of the groove, a plurality of shear nails 4 are arranged on the end plates 3 at intervals, and each shear nail is vertically arranged on the end plate 3. Illustratively, the area of the end plate 3 is larger than the opening of the groove, so as to realize the plugging of the end plate 3 to the opening of the groove. In addition, the end plate 3 may be fixed on the corrugated steel web, and the shear pin 4 may be fixed on the end plate 3, and those skilled in the art may also fix the end plate 3 and the shear pin 4 in other manners, which will not be described herein.
In the practical application process, the number of the shear nails 4 can be designed and adjusted according to the practical construction design requirement. By adopting the corrugated steel web to manufacture the vertical ends of the segments, the structural strength of the vertical ends is higher, and the vertical ends can realize stable support of the end plates 3. Compared with the vertical ends of other structures, the vertical end-to-end plate 3 made of the corrugated steel web has larger supporting area, can improve the structural strength and stability of the end plate 3, ensures that the end plate 3 can stably support the top plate 2 all the time, is beneficial to the construction of the box girder bridge, and improves the structural stability and safety of the box girder bridge. In addition, through utilizing end plate 3 shutoff recess opening to the interval sets up a plurality of shear force nail 4 on end plate 3, and operating personnel also can utilize through-hole 5 to pour concrete in to the recess in the work progress, thereby realizes being connected between locating plate and the vertical end of festival section, and wherein end plate 3 can realize the effective shutoff to the recess, avoids the concrete to spill over, and shear force nail 4 then can combine with the concrete, is favorable to improving the structural strength of roof 2 and the vertical end junction of festival section.
The embodiment provides a prefabricated assembled corrugated steel web continuous box girder bridge, which is formed by adopting prefabricated sections and a top plate, has a simple structure, is easy to construct and assemble, is beneficial to accelerating the site construction progress and reduces complicated site construction steps. In addition, the box girder bridge also has good structural strength and stability, the vertical ends of the sections are manufactured by adopting the corrugated steel webs, the end plates and the shear nails are arranged at the vertical ends of the sections, the end plates can stably support the top plates under the stable support of the corrugated steel webs, and the shear nails on the end plates can effectively improve the structural strength of the joints of the top plates and the vertical ends of the sections after being combined with concrete.
Example two
Fig. 3 is a flowchart of a construction method of a prefabricated corrugated steel web continuous box girder bridge according to the second embodiment, which can be used for the construction of the box girder bridge according to the above embodiment, referring to fig. 3, the method includes the following steps:
s1, dividing the corrugated steel web box girder in sections according to the design and construction requirements of the corrugated steel web box girder bridge, and prefabricating the sections and the top plate according to the divided corrugated steel web boxes Liang Fenduan.
For example, the corrugated steel web box girder may be segmented, and the corrugated steel web continuous box girder L-shaped segments and the top plate may be prefabricated. The difficulty of subsequent construction is reduced through the prefabricated sections and the top plate, so that the construction efficiency is improved.
S2, hoisting the prefabricated two sections to the pier blocks after construction, and enabling the two sections to be positioned at the suspension casting construction position required by design construction.
In the practical application process, the construction of the abutment block is required to be completed firstly, then the left section and the right section of the continuous box girder of the corrugated steel web are lifted to the abutment block position where the construction is completed by using a mobile crane, and the two sections are positioned at the suspension casting construction position required by the design construction.
S3, constructing a joint between one section and the pier block, then constructing a joint between the other section and the pier block, and constructing the joint between the two sections after the construction is completed and stabilized.
Specifically, the specific steps of step S3 include:
s31, firstly constructing joints of the vertical ends of one of the sections and the steel web of the abutment block, and tensioning the joints of the horizontal ends of the section and the bottom plate of the abutment block to prestress and construct after the construction is completed.
S32, constructing a joint between the vertical end of the other segment and the steel web of the abutment block, and tensioning the joint between the horizontal end of the segment and the bottom plate of the abutment block to perform prestress and construction after the construction is completed.
The steel webs can be connected by bolts, and the joint construction can be realized by tightening the bolts.
S33, after the joint construction of the sections and the abutment blocks is completed and stabilized, fixing the joint between the two sections by using the section steel.
S34, pouring concrete into the joint between the two sections, and pouring concrete into the horizontal ends of the two sections, so that the thickness of the bottom plate of the underframe reaches the thickness required by the design of the corrugated steel web box girder.
In the practical application process, the specific steps of step S34 include:
s341, binding reinforcing steel bars at joints of the two sections, and placing a template.
S342, pouring concrete to the joint between the two sections, and finishing joint pouring.
S343, concrete is continuously poured until the thickness of the bottom plate of the underframe reaches the thickness required by the design of the corrugated steel web box girder.
And concrete is poured at the horizontal ends of the sections, so that the thickness of the bottom plate of the underframe reaches the design required thickness of the corrugated steel web box girder. The concrete on the underframe bottom plate not only can improve the structural strength of the joint of the two sections, but also can improve the overall structural strength of the underframe, and ensure the structural strength and stability of the whole box girder bridge after construction is completed.
S4, hoisting the prefabricated top plate to the vertical end of the segment, and constructing a joint between the top plate and the vertical end of the segment.
Exemplary, the specific steps of step S4 include:
s41, hoisting the prefabricated top plate to the vertical end of the segment, and enabling the shear nail at the top of the vertical end of the segment to be positioned in the top plate groove.
S42, pouring concrete from the through holes of the top plate until the construction of the joint between the top plate and the vertical end of the segment is completed.
In the practical application process, concrete can be poured to the longitudinal joint between the two sections, and meanwhile, the residual height of the bottom plate is constructed. Specifically, longitudinal joint steel bars are bound firstly, templates are placed, concrete is poured into the longitudinal joints, and the concrete overflows until the residual height of the bottom plate and the wet joints between the two sections are poured.
S5, repeating the steps S2 to S4 to continue constructing other sections until the construction of the corrugated steel web box girder bridge is completed after the construction of the corrugated steel web box girder of the previous section is completed.
Exemplary, the specific steps of step S5 include:
s51, constructing the rest corrugated steel web boxes Liang Fenduan according to the symmetrical construction mode from side span to mid span after the construction of the corrugated steel web box girder of the previous section is completed. S52, repeating the steps S2 to S4 until the folding section is constructed finally, and completing the construction of the corrugated steel web box girder bridge. By adopting the symmetrical construction mode to construct, the construction efficiency is higher.
The construction method according to this embodiment is further explained below in conjunction with actual construction steps:
step 1, excavating a construction channel, leveling a site, completing pile foundation and bearing platform construction, prefabricating an L-shaped section of a corrugated steel web continuous box girder and a prefabricated top plate in advance, wherein the method is symmetrical construction from side span to middle span, and description is focused on one side, and the other side is not repeated in the same way;
and 2, after the construction of the pier stud and the platform block is completed, lifting the L-shaped section of the continuous corrugated steel web box girder to a target position by using an automobile crane, tightening a corrugated steel web joint between the L-shaped section of the continuous corrugated steel web box girder and the platform block by using a butt bolt, and tensioning the concrete bottom plate of the L-shaped section of the continuous corrugated steel web box girder and the platform block to prestress.
And 3, stabilizing the L-shaped section of the continuous box girder of the corrugated steel web, lifting the other L-shaped section of the continuous box girder of the corrugated steel web to a target position by using an automobile crane, tightening a corrugated steel web joint between the L-shaped section of the continuous box girder of the corrugated steel web and a table block by using a butt bolt, tensioning a half concrete bottom plate of the L-shaped section of the continuous box girder of the corrugated steel web, constructing a longitudinal joint between the L-shaped section of the continuous box girder of the corrugated steel web and the section, binding longitudinal joint steel bars, supporting templates, pouring concrete into the longitudinal joint, and pouring the residual height concrete of the bottom plate and a wet joint between the continuous box girder section of the corrugated steel web and the bottom plate of the table block at the same time after overflow.
Step 4, stabilizing the web plate and the bottom plate of the continuous box girder segment of the corrugated steel web plate, lifting the prefabricated top plate corresponding to the L-shaped segment of the continuous box girder of the corrugated steel web plate, placing the bottom of the prefabricated top plate on the end plate of the corrugated steel web plate, placing shear nails in grooves at the bottom of the top plate, and pouring concrete between the corrugated steel web plate and the top plate from through holes at the top of the top plate to finish construction of the continuous box girder segment 8 of the corrugated steel web plate;
step 5, the automobile crane moves forward, the L-shaped n+ section (n is more than 0, n=1, 2,3 … …) of the continuous box girder of the corrugated steel web is lifted to a target position, the corrugated steel web joint between the n# section of the continuous box girder of the corrugated steel web and the L-shaped n+ section of the continuous box girder of the corrugated steel web is screwed up by using a butt bolt, and then the N# section of the continuous box girder of the steel web and the L-shaped n+ section (n is more than 0, n=1, 2,3 … …) of the continuous box girder of the corrugated steel web are tensioned to pre-stress the bottom plate;
step 6, the L-shaped n+ section of the continuous box girder of the corrugated steel web is stabilized, the L-shaped n+ section of the continuous box girder of the corrugated steel web is lifted to a target position by using an automobile crane, a joint of the corrugated steel web 1 between the n# and n+1' # blocks of the continuous box girder of the corrugated steel web is screwed up by using a butt bolt, the whole section of the n# of the continuous box girder of the corrugated steel web and the bottom plate of the L-shaped n+ section of the continuous box girder of the corrugated steel web are prestressed, meanwhile, the longitudinal joint between the L-shaped n+ section and the n+ section of the continuous box girder of the corrugated steel web is constructed, longitudinal joint steel bars and support templates are bound, concrete is poured into the longitudinal joint, and after the concrete overflows, the residual height concrete of the bottom plate and the wet joint between the L-shaped n# section of the continuous box girder of the corrugated steel web and the bottom plate of the n+ section can be poured;
step 7, stabilizing the n+ section web of the continuous box girder of the corrugated steel web with the bottom plate, lifting the prefabricated top plate corresponding to the L-shaped n+ section of the continuous box girder of the corrugated steel web, placing the bottom of the prefabricated top plate on the end plate of the corrugated steel web, placing shear nails in the grooves at the bottom of the top plate, and pouring concrete between the corrugated steel web and the top plate from the top through holes of the top plate to finish the construction of the n+ section of the continuous box girder of the corrugated steel web;
step 8, repeating the steps 5 to 7 to continue construction, and symmetrically constructing the side span to the middle span until the corrugated steel web continuous box girder bridge is folded to the former section;
step 9, assembling the integral sections of the corrugated steel web continuous box girder folding sections on the site, lifting the corrugated steel web continuous box girder folding sections without the top plate to a target position by using an automobile crane, tightening joint bolts between the corrugated steel web joints on two sides of the corrugated steel web continuous box girder folding sections, simultaneously pouring wet joints between residual height concrete of the bottom plate of the corrugated steel web continuous box girder folding sections and the bottom plate, lifting the corresponding prefabricated top plate, placing the prefabricated top plate on the corrugated steel web end plate, and pouring concrete between the corrugated steel web and the top plate through a through hole from the top of the top plate to complete the integral bridge assembly.
The movable crane is used for replacing the construction hanging basket, the working plane is enlarged, the movement is flexible and convenient, the construction operation of hanging the section which is originally completed by the cantilever in the air and connecting the bottom plate with the corrugated steel web is transferred to the prefabrication stage to be completed, compared with the traditional construction method, the construction method is beneficial to saving water and energy, saving materials, free from the influence of natural environment, and greatly higher in production efficiency than cast-in-situ construction, the engineering quality can be greatly improved, the safety risk of high-altitude operators is reduced, the construction period is shortened, and the equipment lease cost is reduced.
According to the prefabricated assembled corrugated steel web continuous box girder bridge construction method, the use of hanging baskets and brackets can be eliminated by utilizing the assembled construction method of the movable crane, so that the measure cost is effectively reduced, the construction operation time at high altitude can be effectively reduced, and the construction risk is reduced.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (1)
1. A prefabricated assembled corrugated steel web continuous box girder bridge is characterized in that: the novel lifting device comprises a top plate and a bottom frame arranged below the top plate, wherein the bottom frame is of a U-shaped structure, and two ends of the bottom frame are connected with the top plate; the underframe comprises a left section and a right section, the left section and the right section are of L-shaped structures, the horizontal ends of the left section and the right section are connected with each other, and the vertical ends of the left section and the right section are connected with the top plate;
the horizontal ends of the left section and the right section are made of reinforced concrete, and the vertical ends are made of corrugated steel webs;
grooves are formed in the positions, corresponding to the vertical ends of the left section and the right section, of the top plate, at least two through holes are formed in the positions, corresponding to the grooves, of the top plate at intervals, and each through hole is communicated with the corresponding groove;
the vertical ends of the left section and the right section are respectively provided with an end plate for blocking the opening of the groove;
a plurality of shear nails are arranged on the end plate at intervals, and each shear nail is vertically arranged on the end plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320008082.9U CN219547534U (en) | 2023-01-04 | 2023-01-04 | Prefabricated assembled corrugated steel web continuous box girder bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320008082.9U CN219547534U (en) | 2023-01-04 | 2023-01-04 | Prefabricated assembled corrugated steel web continuous box girder bridge |
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| CN219547534U true CN219547534U (en) | 2023-08-18 |
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| CN202320008082.9U Active CN219547534U (en) | 2023-01-04 | 2023-01-04 | Prefabricated assembled corrugated steel web continuous box girder bridge |
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2023
- 2023-01-04 CN CN202320008082.9U patent/CN219547534U/en active Active
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