CN113512935B - Temporary connection structure of prefabricated spliced bridge and prefabricated beam section - Google Patents
Temporary connection structure of prefabricated spliced bridge and prefabricated beam section Download PDFInfo
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- CN113512935B CN113512935B CN202110775736.6A CN202110775736A CN113512935B CN 113512935 B CN113512935 B CN 113512935B CN 202110775736 A CN202110775736 A CN 202110775736A CN 113512935 B CN113512935 B CN 113512935B
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- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 15
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- 239000003292 glue Substances 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000010276 construction Methods 0.000 description 14
- 238000004873 anchoring Methods 0.000 description 10
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 9
- 239000011148 porous material Substances 0.000 description 7
- 239000004567 concrete Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000009417 prefabrication Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
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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
- E01D19/00—Structural or constructional details of bridges
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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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The embodiment of the application provides a temporary connection structure and precast beam section of prefabricated concatenation bridge, wherein, the temporary connection structure of prefabricated concatenation bridge includes: the multiple sections of precast beam sections are sequentially arranged along the length direction of the bridge; a pre-buried pipe with a central line being an arc line is arranged in the precast beam section; the outer end of the embedded pipe extends to the end face of the precast beam section extending along the width direction, a hand hole is formed in the side wall of the precast beam section parallel to the length direction of the bridge, and the hand hole is communicated with the inner end of the embedded pipe; the outer ends of the embedded pipes on two adjacent precast beam sections are correspondingly butted; wear to be equipped with the annular rivet that the central line is the pitch arc between the hand hole of two adjacent precast beam sections and the pre-buried pipe, the head of annular rivet is located the hand hole of one of them precast beam section, and the afterbody of annular rivet is located the hand hole of another precast beam section and can dismantle with the lantern ring and be connected. The technical scheme provided by the embodiment of the application can apply temporary pretightening force to the two precast beam sections.
Description
Technical Field
The application relates to a bridge construction technology, in particular to a temporary connection structure and a precast beam section of a prefabricated spliced bridge.
Background
The segment prefabrication and assembly technology is a construction mode of dividing a bridge structure into whole parts along the longitudinal direction and then dividing the whole parts into whole parts. The beam sections are produced in a unified mode in the precast yard, the produced precast beam sections are conveyed to a construction site to be directly assembled, and the precast beam sections are suitable for prestressed concrete simply-supported beams, continuous beams and simply-supported-then-continuous bridges with medium and below spans. The segment prefabrication and assembly technology has great superiority in the aspects of good construction quality, fast construction progress, little environmental pollution and the like, and has good popularization and application prospects in the future bridge industrialization process.
The segment prefabrication and assembly construction technology can be divided into a cemented joint and a wet joint according to the difference of joints between beam segments, the wet joint is gradually reduced due to factors such as easy cracking of post-cast strip concrete, long construction period and the like, and the cemented joint is more applied at present. Shear bonds need to be arranged between beam sections of the glued spliced beams, epoxy resin glue is smeared in the splicing process, and temporary pre-pressure is applied.
At present, temporary pre-pressure between glued and spliced beam sections is usually applied in an external pre-stress mode, the pre-stress is mostly applied by finish-rolled deformed steel bars, and the anchoring mode of the prestressed screw bars mainly comprises a concrete anchoring block, an embedded U-shaped anchor bolt movable steel pedestal and a movable steel pedestal with a reserved anchoring pore passage.
The temporary prestress is generally arranged in the section assembled beam along the longitudinal through length of the bridge, the position of the pre-buried U-shaped anchor bolt on a web plate is relatively fixed, and the temporary prestress is extremely easy to collide with a longitudinal prestress steel beam which is continuously bent and changed in spatial position, so that the spatial limitation of the arrangement of the temporary prestress is large.
The existing temporary anchoring measures all have defects in different degrees: the concrete anchor blocks cannot be reused, and the material cost and the structural weight are increased; the movable steel pedestal of the U-shaped anchor bolt is pre-embedded, the U-shaped anchor bolt extends out of the surface of the precast concrete segment, holes need to be drilled at corresponding positions of the template, the integrity of the template is influenced, the positions of temporary tensioning pedestals of all precast segments are possibly inconsistent, and the types of the template are increased; the movable steel pedestal for reserving the anchoring pore canal has larger workload of later-stage pore canal plugging, and the improper plugging of the pore canal is easy to seep water.
Disclosure of Invention
In order to solve one of the technical defects, the embodiment of the application provides a temporary connection structure of a prefabricated spliced bridge and a prefabricated beam section.
According to a first aspect of the embodiments of the present application, there is provided a temporary connection structure of a prefabricated spliced bridge, including: the multiple sections of precast beam sections are sequentially arranged along the length direction of the bridge;
a pre-buried pipe is arranged in the precast beam section, and the central line of the pre-buried pipe is an arc line; the outer end of the embedded pipe extends to the end face of the precast beam section extending along the width direction, a hand hole is formed in the side wall of the precast beam section parallel to the length direction of the bridge, and the hand hole is communicated with the inner end of the embedded pipe;
the outer ends of the embedded pipes on two adjacent precast beam sections are correspondingly butted; wear to be equipped with the annular rivet that the central line is the pitch arc between the hand hole of two adjacent precast beam sections and the pre-buried pipe, the head of annular rivet is located the hand hole of one of them precast beam section, and the afterbody of annular rivet is located the hand hole of another precast beam section and can dismantle with the lantern ring and be connected.
According to a second aspect of embodiments herein, there is provided a precast beam segment comprising: the top plate, the bottom plate and the webs vertically connected between the top plate and the bottom plate are respectively connected to two ends of the bottom plate along the width direction of the precast beam section, and a preset gap is formed between the two webs;
a pre-embedded pipe with an arc line as a central line is arranged in the web plate, the outer end of the pre-embedded pipe extends to the end face of the web plate, a hand hole is formed in the side wall of the web plate, and the hand hole is communicated with the inner end of the pre-embedded pipe; an annular groove rivet with an arc line as the central line can be arranged in the embedded pipe in a penetrating manner.
According to the technical scheme provided by the embodiment of the application, the precast beam section is internally provided with the embedded pipe of which the central line is an arc line, the outer end of the embedded pipe extends to the end face of the precast beam section, and the side wall of the precast beam section is provided with a hand hole communicated with the embedded pipe; the embedded pipes on two adjacent precast beam sections are correspondingly butted; annular groove rivets with arc center lines are arranged between the hand holes of the two adjacent precast beam sections and the embedded pipes in a penetrating manner, the head parts of the annular groove rivets are positioned in the hand holes of one precast beam section, the tail parts of the annular groove rivets are positioned in the hand holes of the other precast beam section and are detachably connected with the lantern ring, and temporary pre-pressure is applied to the two precast beam sections by applying axial pressing force to the annular groove rivets and applying radial pressing force to the lantern ring; and after pre-pressure is not required to be applied, subsequent bridge construction steps can be carried out by detaching the annular groove rivet and the lantern ring from the hand hole, convenience and rapidness are achieved, and the problems that concrete anchoring blocks cannot be reused and material cost and structure weight are increased, integrity of a formwork is affected by a movable steel pedestal of a pre-buried U-shaped anchor bolt and various formworks are needed due to the movable steel pedestal of a reserved anchoring hole, later-stage hole plugging workload is large, water seepage is caused easily due to improper hole plugging, and the like due to the use of the movable steel pedestal of the reserved anchoring hole in the traditional scheme are solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural view of a prefabricated spliced bridge provided in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a prefabricated spliced beam section provided by the embodiment of the present application, in which a pre-tightening force is applied by a ring groove rivet;
FIG. 3 is an enlarged view of a portion of FIG. 2;
fig. 4 is an end view of a precast beam segment in the precast spliced bridge provided by the embodiment of the present application;
fig. 5 is a schematic structural diagram of a ring groove rivet applied to a prefabricated spliced bridge according to an embodiment of the present application.
Reference numerals:
1-prefabricating a beam section; 11-a pre-buried pipe; 12-hand hole; 13-prefabricating the end faces of the beam sections; 14-a top plate; 15-a base plate; 16-a web; 17-longitudinal prestressed pipe; 18-shear key;
2-ring groove rivet; 21-a rod part; 22-a head; 23-a ring groove;
and 3-a lantern ring.
Detailed Description
In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the following description of the exemplary embodiments of the present application with reference to the accompanying drawings is made in further detail, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all the embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The embodiment provides a temporary connecting structure of a prefabricated spliced bridge, which can be used for providing pre-pressure when a precast beam section is temporarily spliced.
Fig. 1 is a schematic structural view of a prefabricated spliced bridge provided by an embodiment of the present application, fig. 2 is a schematic structural view of a prefabricated spliced beam section provided by an embodiment of the present application, in which a pretightening force is applied by a ring groove rivet, and fig. 3 is a partially enlarged view in fig. 2. In fig. 1 and 2, the L direction represents the longitudinal direction of the bridge, the H direction represents the height direction of the bridge, and the W direction represents the width direction of the bridge.
As shown in fig. 1, the prefabricated spliced bridge provided by this embodiment includes a plurality of prefabricated beam sections 1, which are sequentially arranged along the length direction (e.g., L direction in the figure) of the bridge, and adjacent prefabricated beam sections 1 are connected with each other. The precast beam section 1 is a precast structure, in particular a concrete precast beam section.
As shown in fig. 2 and 3, a pre-buried pipe 11 is arranged in the precast beam section 1, the outer end of the pre-buried pipe 11 extends to the end surface (i.e., the precast beam section end surface 13) of the precast beam section extending along the width direction, a hand hole 12 is arranged on the side wall of the precast beam section 1 parallel to the length direction of the bridge, and the hand hole 12 is communicated with the inner end of the pre-buried pipe 11. The centerline of the pre-buried pipe 11 is an arc.
The outer ends of the embedded pipes 11 on the two adjacent precast beam sections 1 are correspondingly butted, the annular groove rivet 2 penetrates through the hand holes 12 of the two adjacent precast beam sections 1 and the embedded pipes 11, the head of the annular groove rivet 2 is located in the hand hole 12 of one of the precast beam sections, the tail of the annular groove rivet 2 is located in the hand hole 12 of the other precast beam section and is detachably connected with the lantern ring 3, and the lantern ring 3 is sleeved on the annular groove rivet 2. The center line of the ring groove rivet 2 is an arc line, and the curvature radius of the arc line is matched with the embedded pipe 11.
The curvature radius of the central line of the embedded pipe 11 is the same as that of the ring groove rivet 2, and the ring groove rivet 2 can penetrate through the two embedded pipes 11 which are butted.
By applying axial pressing force to the ring groove rivet 2 and radial pressing force to the lantern ring 3, pressing force can be applied to two adjacent precast beam sections 1.
In the application process of the technical scheme, firstly, the shear keys in two adjacent prefabricated bridges are in butt joint fit, then the shear keys are coated with fixing glue, and then the whole cross section of the beam body is coated with the fixing glue, such as epoxy resin glue; then the ring groove rivet 2 penetrates into a hand hole 12 of another prefabricated bridge section from the hand hole 12 of one prefabricated bridge section, the ring groove rivet 2 is sleeved with the ring groove rivet 3 from one side of the other prefabricated bridge section, finally, axial pressing force is applied to the ring groove rivet 2, radial pressing force is applied to the ring groove rivet 3, and temporary pre-pressure is applied between the two prefabricated bridge sections.
After the butt joint construction step of the shear key is completed, the ring groove rivet 2 and the lantern ring 3 are detached from the hand hole, and the subsequent steps of bridge construction are continuously executed.
According to the technical scheme provided by the embodiment, a pre-buried pipe with a central line being an arc line is arranged in the precast beam section, the outer end of the pre-buried pipe extends to the end face of the precast beam section, and a hand hole communicated with the pre-buried pipe is formed in the side wall of the precast beam section; the embedded pipes on two adjacent precast beam sections are correspondingly butted; annular groove rivets with arc center lines are arranged between the hand holes of the two adjacent precast beam sections and the embedded pipes in a penetrating manner, the head parts of the annular groove rivets are positioned in the hand holes of one precast beam section, the tail parts of the annular groove rivets are positioned in the hand holes of the other precast beam section and are detachably connected with the lantern ring, and temporary pre-pressure is applied to the two precast beam sections by applying axial pressing force to the annular groove rivets and applying radial pressing force to the lantern ring; and after no pre-pressure is needed to be applied, the ring groove rivet and the lantern ring are detached from the hand hole, so that the subsequent bridge construction step can be carried out, the method is convenient and fast, and the problems that in the traditional scheme, the concrete anchoring block cannot be reused, the material cost and the structure weight are increased, the integrity of the template is influenced by the movable steel pedestal of the pre-buried U-shaped anchor bolt, various templates are needed, the later-stage pore plugging workload is large and the water seepage is easy due to improper pore plugging caused by the use of the movable steel pedestal of the reserved anchoring pore canal, and the like are solved.
On the basis of the above technical solution, the embodiment provides a specific implementation manner of the precast beam segment 1:
fig. 4 is an end view of a precast beam segment in the precast spliced bridge provided by the embodiment of the present application. As shown in fig. 4, the precast beam segment 1 includes: a top plate 14, a bottom plate 15 and a web 16 connected vertically between the top plate 14 and the bottom plate 15. The top plate 14 is parallel to the bottom plate 15, and the top plate 14 has a width greater than that of the bottom plate 15. The webs 16 are respectively connected to two ends of the bottom plate 15 along the width direction of the precast beam segment, and a preset gap is formed between the two webs 16.
In another precast beam segment, the width of the top slab may be the same as or less than the width of the bottom slab.
The hand hole 12 may be provided on the top plate 14, the bottom plate 15 or the web 16, and the present embodiment is exemplified by being provided on the web 16. The adjacent surfaces of the two webs 16 are referred to as inner surfaces, the surfaces facing away from each other are referred to as outer surfaces, the hand hole 12 may be disposed on the inner surface of the web 16, or may be disposed on the outer surface of the web 16, and the embodiment takes the inner surface of the web 16 as an example to explain the specific implementation manner thereof.
As shown in fig. 2, the hand holes 12 are provided on the inner surface of the web 16, and the depth direction of the hand holes 12 is the same as the width direction of the precast beam segment 1. The centerline of the pre-buried pipe 11 is an arc, with its outer end extending to the end face of the web 16 and its inner end extending curved towards the inner surface of the web 16. The lateral wall of hand hole 12 is equipped with the trompil, and the trompil communicates with the inner of pre-buried pipe 11, adopts the central line to be curved annular rivet 2, penetrates pre-buried pipe 11 from hand hole 12 in, reaches the hand hole 12 of another precast beam section.
For the precast beam section 1, the lower part of the web plate 16 is provided with a longitudinal prestressed pipeline 17 for penetrating steel strands, and the longitudinal prestressed pipeline 17 extends along the length direction of the bridge. The hand hole 12 is provided at an upper portion of the web 16 with a predetermined distance between the hand hole 12 and the longitudinal pre-stressed pipe 17.
Specifically, the longitudinal prestressed pipes 17 are plural and are arranged in the middle and lower portions of the web 12 at intervals in the vertical direction. The hand holes 12 are also multiple in number and are arranged at intervals on the upper part of the web 12 along the vertical direction. The distance between the lowermost hand hole 12 and the uppermost longitudinal pre-stressed pipe 17 is greater than or equal to the outer diameter of the longitudinal pre-stressed pipe 17. The implementation mode can effectively avoid position conflict among the steel strands in the embedded pipe 11, the hand hole 12 and the longitudinal prestressed pipeline 17.
A plurality of embedded pipes 11 are arranged in the web plate 16, the embedded pipes 11 are arranged at intervals along the vertical direction, and one embedded pipe 11 is correspondingly communicated with one hand hole 12. Ensuring that the web 16 is uniformly compressed.
Two longitudinal pre-stressed ducts 17 may be arranged horizontally at the same height of the web 16. Further, the bottom plate 15 is also provided with a plurality of longitudinal prestressed pipes 17 which are arranged at intervals along the width direction of the bottom plate 15.
One implementation is as follows: the end face of the web plate 16 is further provided with shear keys and/or shear grooves, the shear key on the web plate 16 of one precast beam segment penetrates into the corresponding shear groove on the web plate 16 of another precast beam segment, fixing glue is arranged between the shear keys and the shear groove walls, and fixing glue, such as epoxy resin glue, is also smeared between the beam segment sections. Specifically, all the web end surfaces of one precast beam segment 1 can be provided with shear keys, all the web end surfaces of adjacent precast beam segments 1 are provided with shear grooves, and the shear keys are inserted into the shear grooves for connection. Or, the end surface of the web plate of one precast beam segment 1 is provided with both a shear key and a shear groove; and correspondingly arranging a shear groove and a shear key on the end surface of the web plate of the adjacent precast beam section 1 so as to enable the two precast beam sections 1 to be correspondingly inserted and fixed through the shear key and the shear groove. Only the shear key 18 is labeled in fig. 4, and the remaining structure may be a shear key 18 or a shear groove.
A shear key or a shear groove is arranged between two adjacent embedded pipes 11 on the same web plate 16.
The end face of the bottom plate 15 is also provided with a shear key and/or a shear groove, the shear key on one precast beam segment bottom plate 15 penetrates into the corresponding shear groove on the other precast beam segment bottom plate 15, and fixing glue is arranged between the shear key and the wall of the shear groove. The bottom plate 15 of one precast beam section 1 can be only provided with a shear key 18 for being inserted into a shear groove on the bottom plate 15 at two adjacent precast ends 1; or the bottom plate 15 of one precast beam segment is provided with both the shear key 18 and the shear groove, and the shear groove and the shear key on the bottom plate 15 of the adjacent precast beam segment are correspondingly inserted.
The number and arrangement of the shear keys 18, the embedded pipes 11 and the longitudinal prestressed pipes 17 on the base plate 15 and the web 16 can be referred to fig. 4, but are not limited to fig. 4.
FIG. 5 is a schematic structural diagram of a ring groove rivet applied to a prefabricated spliced bridge according to an embodiment of the present application. As shown in fig. 5, the ring groove rivet 2 used in the present embodiment includes: a stem 21 and a head 22. The section of the rod part 21 is circular, and the central line of the rod part 21 is an arc line. The middle part of the rod part 21 and the tail end far away from the head part 22 are respectively provided with a plurality of annular grooves 23. The diameter of the head portion 22 is larger than the diameter of the shaft portion 21.
The lantern ring 3 is sleeved on the rod part 21, when the lantern ring is subjected to radial pressing force, metal on the inner wall of the lantern ring 3 flows into the annular groove of the annular groove rivet 2 to form metal plastic deformation connection, and then the rod part 21 is pressed tightly. The connection of the lantern ring 3 and the annular rivet 2 has the advantages of even force transmission, firmness and reliability, the annular rivet is small in size, and the position arrangement is flexible when the connection is applied.
The head 22 is located in the hand hole 12 of one of the precast beam segments and the collar 3 is located in the hand hole 12 of the other precast beam segment. An axial stretching force is applied to the ring groove rivets 2 by adopting a rivet pulling riveting tool, the connection pre-tightening force of the single ring groove rivet 2 can reach 500KN, radial pressing force is applied to the lantern ring 3, and then temporary pressing force is applied to the two precast beam sections 1, so that epoxy resin glue is ensured to be solidified and tightly filled between the shear key and the shear groove, the gluing firmness degree between the shear key and the shear groove is improved, and the process of applying the pre-tightening force is simple and rapid. After all precast beam sections are assembled, reverse force is applied to the ring groove rivets 2 through the rivet pulling riveting tool, the ring groove rivets 2 are detached from the hand holes, then the hand holes 12 are plugged, and the integrity of the beam surface on the inner side of the web 16 is guaranteed.
The technical scheme can meet the requirement that the segmental assembled beam quickly and effectively applies pre-pressure, effectively shortens the construction period, ensures the reliability of temporary connection, and has profound significance for improving the construction level of the segmental assembled beam in the railway construction field.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; may be mechanically, electrically or otherwise in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (5)
1. The utility model provides a temporary connection structure of prefabricated concatenation bridge which characterized in that includes: the multiple sections of precast beam sections are sequentially arranged along the length direction of the bridge;
a pre-buried pipe is arranged in the precast beam section, and the central line of the pre-buried pipe is an arc line; the outer end of the embedded pipe extends to the end face of the precast beam section extending along the width direction, a hand hole is formed in the side wall of the precast beam section parallel to the length direction of the bridge, and the hand hole is communicated with the inner end of the embedded pipe;
the outer ends of the embedded pipes on two adjacent precast beam sections are correspondingly butted; an annular groove rivet with an arc line as a central line is arranged between the hand hole of the two adjacent precast beam sections and the embedded pipe in a penetrating manner, the head of the annular groove rivet is positioned in the hand hole of one precast beam section, and the tail of the annular groove rivet is positioned in the hand hole of the other precast beam section and is detachably connected with the lantern ring; applying axial pressing force to the ring groove rivet and applying radial pressing force to the lantern ring to realize temporary pre-pressing force to the two precast beam sections; and removing the ring-grooved rivet and the collar from the hand hole after pre-stressing is not required;
the precast beam segment includes: the prefabricated beam comprises a top plate, a bottom plate and a web plate vertically connected between the top plate and the bottom plate, wherein the web plate is respectively connected to two ends of the bottom plate along the width direction of a prefabricated beam section;
the hand hole is formed in the inner surface of the web plate, an opening is formed in the side wall of the hand hole, and the opening is communicated with the inner end of the embedded pipe;
the lower part of the web plate is provided with a longitudinal prestressed pipeline for penetrating the steel strand; the hand hole is arranged at the upper part of the web plate, and a preset distance is reserved between the hand hole and the longitudinal prestressed pipeline;
a plurality of hand holes are formed in one web plate, and the hand holes are vertically arranged at intervals; a plurality of embedded pipes are arranged in the web plate, the embedded pipes are vertically arranged at intervals, and one embedded pipe is correspondingly communicated with one hand hole; the preset distance between the embedded pipe positioned at the lowest end and the longitudinal prestressed pipeline is larger than or equal to the outer diameter of the longitudinal prestressed pipeline.
2. The temporary connection structure of the precast spliced bridge girder as claimed in claim 1, wherein the end surface of the web plate is further provided with a shear key and/or a shear groove, the shear key on the web plate of one precast beam segment penetrates into the corresponding shear groove on the web plate of another precast beam segment, and a fixing glue is arranged between the shear key and the wall of the shear groove.
3. The temporary connection structure of the precast spliced bridge girder according to claim 2, wherein a shear key or a shear groove is provided between two adjacent embedded pipes on the same web.
4. The temporary connection structure of the precast spliced bridge as claimed in claim 2, wherein the end surface of the base plate is provided with shear keys and/or shear grooves, the shear key on the base plate of one precast beam segment penetrates into the corresponding shear groove on the base plate of the other precast beam segment, and fixing glue is arranged between the shear key and the wall of the shear groove.
5. A precast beam segment applied to a temporary connection structure of a precast spliced bridge according to any one of claims 1 to 4, comprising: the prefabricated beam comprises a top plate, a bottom plate and a web plate vertically connected between the top plate and the bottom plate, wherein the web plate is respectively connected to two ends of the bottom plate along the width direction of a prefabricated beam section;
a pre-embedded pipe with an arc line as a central line is arranged in the web plate, the outer end of the pre-embedded pipe extends to the end face of the web plate, a hand hole is formed in the side wall of the web plate, and the hand hole is communicated with the inner end of the pre-embedded pipe; the embedded pipe is internally used for penetrating a ring groove rivet with an arc line as a central line;
the hand hole is formed in the inner side face of the web plate, an opening is formed in the side wall of the hand hole, and the opening is communicated with the inner end of the embedded pipe;
the lower part of the web plate is provided with a longitudinal prestressed pipeline for penetrating the steel strand; the hand hole is arranged at the upper part of the web plate, and a preset distance is reserved between the hand hole and the longitudinal prestressed pipeline; a plurality of hand holes are formed in one web plate, and the hand holes are vertically arranged at intervals; a plurality of embedded pipes are arranged in the web plate, the embedded pipes are vertically arranged at intervals, and one embedded pipe is correspondingly communicated with one hand hole; the preset distance between the embedded pipe located at the lowest end and the longitudinal prestressed pipeline is larger than or equal to the outer diameter of the longitudinal prestressed pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110775736.6A CN113512935B (en) | 2021-07-08 | 2021-07-08 | Temporary connection structure of prefabricated spliced bridge and prefabricated beam section |
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| CN115200767A (en) * | 2022-06-10 | 2022-10-18 | 中铁第五勘察设计院集团有限公司 | Method and system for detection of axial force consistency of ring groove rivet connection pair for bridges |
| CN116537036A (en) * | 2023-05-05 | 2023-08-04 | 中交第二航务工程局有限公司 | Segment beam temporary pre-stressing structure and method based on arc bolt connection |
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| CN201738226U (en) * | 2010-07-15 | 2011-02-09 | 中铁第一勘察设计院集团有限公司 | Railway box girder assembled and cemented by precast segments |
| CN108385512A (en) * | 2018-03-22 | 2018-08-10 | 北京工业大学 | One kind being based on bolted modular assembly formula Hollow High Pier splicing structure and its practice |
| CN109610315A (en) * | 2018-12-26 | 2019-04-12 | 北京工业大学 | Prefabricated bridge deck dry seam connection structure and implementation method |
| CN110258304A (en) * | 2019-06-26 | 2019-09-20 | 中铁二十三局集团建筑设计研究院有限公司 | A kind of joint structure of prefabricated reinforced concrete pier or column |
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| CN111809747A (en) * | 2020-07-28 | 2020-10-23 | 西安建筑科技大学 | A beam-column joint |
| CN112391933A (en) * | 2020-10-30 | 2021-02-23 | 山东高速城投绕城高速公路有限公司 | Hybrid beam box girder bridge longitudinally spliced by shear keys and construction method |
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