CN114808666A - Complete set of controllable shear-resistant and pull-resistant connecting piece for detachable steel-concrete composite beam bridge and construction method thereof - Google Patents
Complete set of controllable shear-resistant and pull-resistant connecting piece for detachable steel-concrete composite beam bridge and construction method thereof Download PDFInfo
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- CN114808666A CN114808666A CN202210555820.1A CN202210555820A CN114808666A CN 114808666 A CN114808666 A CN 114808666A CN 202210555820 A CN202210555820 A CN 202210555820A CN 114808666 A CN114808666 A CN 114808666A
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- 239000004567 concrete Substances 0.000 title claims abstract description 54
- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 349
- 239000010959 steel Substances 0.000 claims abstract description 349
- 239000011178 precast concrete Substances 0.000 claims description 57
- 238000003466 welding Methods 0.000 claims description 30
- 239000013013 elastic material Substances 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 16
- 239000002985 plastic film Substances 0.000 claims description 8
- 229920006255 plastic film Polymers 0.000 claims description 8
- 239000010687 lubricating oil Substances 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000010008 shearing Methods 0.000 abstract description 9
- 230000007774 longterm Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000009417 prefabrication Methods 0.000 abstract 1
- 239000010426 asphalt Substances 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 210000003141 lower extremity Anatomy 0.000 description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 210000001364 upper extremity Anatomy 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002277 temperature effect Effects 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
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Abstract
The invention discloses a complete set of controllable shearing-resistant and pulling-resistant connecting piece for a detachable steel-concrete composite beam bridge and a construction method thereof. The invention can realize the complete prefabrication of the concrete bridge deck in the hogging moment area of the assembly type steel-concrete combined continuous beam bridge, can effectively control the tensile stress of the concrete bridge deck in the hogging moment area, improves the integral stress performance of the connection area, improves the long-term performance and the durability of the concrete bridge deck, and simultaneously has the anti-pulling capacity to resist the lifting of a concrete slab and the separation from the surface of a steel beam.
Description
Technical Field
The invention relates to the technical field of structural engineering, in particular to a complete set of controllable shearing-resistant and pulling-resistant connecting piece for a detachable steel-concrete composite beam bridge and a construction method thereof.
Background
The connecting piece is the key that the concrete bridge deck and the steel beam can form combined action and work together, and the connecting piece mainly bears the longitudinal shearing force between the steel beam and the concrete slab interface and limits the free sliding between the steel beam and the concrete slab interface, so that the cooperative deformation between the steel beam and the concrete slab is ensured, the steel beam and the concrete slab are ensured to work together, and the rigidity and the bearing capacity of the section are improved; the connector also resists vertical separation and lifting of the concrete slab due to overall longitudinal bending as well as local lateral bending.
For a steel-concrete composite beam in a hogging moment section, the upper concrete deck is in tension, which makes it more susceptible to cracking. Shrinkage creep and temperature effects produce tensile stresses in the concrete panel that are not effectively relieved by the constraint of the peg attachment, which adversely affects the long term performance and durability of the concrete panel. In summary, in the hogging moment section of the continuous composite beam bridge, the shear connector can adversely affect the stress of the structure, but if the shear connector is not used, the steel and the concrete are not combined, although the problem can be improved, the problem of vertical lifting of the concrete slab cannot be effectively solved.
At present, various connecting pieces which are only used for resisting pulling in a hogging moment area but not used for resisting shearing in the longitudinal direction are already available for a steel-concrete continuous composite beam bridge which adopts a cast-in-place concrete bridge deck and a precast concrete bridge deck with reserved key grooves or holes for post-pouring. The field cast-in-place wet operation exists in the connection area of the cast-in-place concrete bridge deck slab and the precast concrete bridge deck slab poured after the key slot or the hole is reserved, although the field wet operation of the precast concrete bridge deck slab reserved with the key slot or the hole is less, the integral stress performance of the connection area of the precast concrete bridge deck slab is affected by the reserved key slot or the hole, and the existing pulling-resistant and shearing-resistant connecting pieces mostly adopt a mode of wrapping elastic materials outside the connecting pieces, inevitably bear the longitudinal shearing force of a hogging moment area and can not be accurately controlled and calculated. With the improvement of the environmental protection requirement and the development of the assembly type bridge technology, the development of a controllable shearing-resistant and pulling-resistant connecting piece which is simple in connection, free of concrete wet operation on site, good in overall performance of a connection area and suitable for a hogging moment area of a continuous combined beam bridge, and is detachable, is urgently needed.
Disclosure of Invention
The invention aims to provide a complete set of controllable shearing-resistant and pulling-resistant connecting piece for a detachable steel-concrete composite beam bridge and a construction method thereof, and aims to solve the problems in the prior art.
The technical scheme adopted for achieving the purpose of the invention is that the complete set of controllable shear-resistant and anti-pulling connecting piece for the detachable steel-concrete composite beam bridge comprises a plurality of bolts and a plurality of embedded pieces.
The embedded part comprises an upper steel plate, a lower steel plate and a plurality of steel pipes, and the cross section of each steel pipe is a straight-edge ellipse.
The upper portion steel sheet and the lower part steel sheet all level set up and the upper portion steel sheet is located directly over the lower part steel sheet, and a plurality of vertical steel pipe welding are between upper portion steel sheet and lower part steel sheet.
And a plurality of embedded parts are embedded in the precast concrete bridge deck, and the lower surface of the lower steel plate is flush with the lower surface of the precast concrete bridge deck.
A plurality of recesses have been seted up to precast concrete decking's upper surface, and the size and the upper portion steel sheet size phase-match of recess, a plurality of upper portion steel sheets are installed in the bottom of recess.
The lower ends of the bolts are connected with the upper surface of the steel beam, the upper ends of the bolts sequentially penetrate through the lower steel plate, the steel pipe and the upper steel plate of the corresponding embedded part, a steel base plate is mounted on each bolt, the nut structure is screwed, the lower surface of each steel base plate is in contact with the upper steel plate, the upper surface of each steel base plate is in contact with the nut structure, and the top of each bolt is located in the corresponding groove.
And the groove is filled with an elastic material.
Furthermore, lubricating oil is uniformly coated on the upper surface of the upper steel plate.
Furthermore, a plurality of layers of plastic films are paved on the surface of the steel base plate, which is in contact with the upper steel plate.
Further, all laminate vertical banding board on every lateral wall of recess, mutual welding between the adjacent banding board, the lower limb and the upper portion steel sheet welding of banding board, the upper surface of upper edge and precast concrete decking flushes.
Furthermore, horizontal movable steel cover plate is installed at the opening of the groove, the edge of the movable steel cover plate is in contact with the edge sealing plate, the lower surface of the movable steel cover plate is in contact with the tops of the bolts, and the upper surface of the movable steel cover plate is flush with the upper surface of the concrete bridge deck.
Further, a plurality of through holes for the steel pipes to extend into are formed in the upper steel plate and the lower steel plate, a groove is formed in an upper port of each through hole in the upper steel plate, a groove is formed in a lower port of each through hole in the lower steel plate, the upper ends of the steel pipes extend into the through holes in the upper steel plate and are welded with the upper steel plate through the grooves, and the lower ends of the steel pipes extend into the through holes in the lower steel plate and are welded with the lower steel plate through the grooves.
Further, the nut structure includes two nuts that all screw in the bolt and support tightly each other, and the nut of below supports tightly with the steel backing plate.
Further, each nut and the bolt are subjected to spot welding.
Furthermore, the steel beam is I-shaped steel, and the bolts and the upper flange of the steel beam are welded in an arc welding mode.
According to the construction method of the complete set of controllable shear-resistant and anti-pulling connecting pieces for the detachable steel-concrete composite beam bridge, the construction method comprises the following steps:
1) connecting a plurality of said bolts to the steel beam.
2) And embedding the embedded part in the precast concrete bridge deck, and welding a sealing plate on the upper surface of the upper steel plate.
3) And respectively enabling a plurality of bolts to penetrate through the corresponding embedded parts.
4) And mounting a steel base plate on the bolt, screwing a nut structure, and performing spot welding on the nut structure and the bolt.
5) And filling elastic materials in the groove, and installing the movable steel cover plate at the opening of the groove.
The invention has the beneficial effects that:
1. the tensile stress born by the precast concrete slab in the hogging moment area of the steel-concrete composite beam bridge can be effectively reduced, and the crack development of the concrete slab in the hogging moment area is reduced or avoided, so that the long-term performance and the durability of the precast concrete bridge deck are improved;
2. the longitudinal shearing force born by the connecting piece can be reliably calculated by adjusting the friction coefficient of the pressure surface;
3. because the existing prefabricated bridge deck is generally provided with square through holes of about 400mm or is provided with a post-cast groove along the upper surface of a steel beam in a through manner, the reserved holes are large, the related area is wide, and the integrity of the prefabricated bridge deck is weakened;
4. the problem of the reinforcing bar disconnection is solved, and the atress reinforcing bar that realizes the connection region is continuous, makes it have better wholeness, promotes the whole atress performance of connection region precast concrete decking, has reliable resistance to plucking ability, can effectively resist the effect of lifting of precast concrete board for the girder steel.
5. The method can realize the assembly and rapid construction of the steel-concrete composite bridge, is favorable for accelerating the bridge construction speed and shortening the construction period, has reliable construction quality, is favorable for the industrialization of the bridge construction, and has wide market application prospect.
Drawings
FIG. 1 is a schematic view of a connection between a steel beam and a precast concrete deck slab by using the connecting member of the present invention;
FIG. 2 is a schematic connection diagram of a bolt, a steel backing plate and a nut structure;
FIG. 3 is a schematic view of the connection between an embedded part and a sealing plate;
FIG. 4 is a cross-sectional view of a connection of a steel girder with a precast concrete deck slab;
FIG. 5 is a schematic view of the installation of the connector of the present invention;
FIG. 6 is a cross-sectional view of an embedment and edge banding plate connection.
In the figure: the prefabricated concrete bridge deck comprises bolts 1, embedded parts 2, upper steel plates 201, lower steel plates 202, steel pipes 203, prefabricated concrete bridge deck plates 3, grooves 301, steel base plates 4, nut structures 5, edge sealing plates 6, movable steel cover plates 7 and steel beams 8.
Detailed Description
The present invention is further illustrated by the following examples, but it should not be construed that the scope of the above-described subject matter is limited to the following examples. Various substitutions and modifications can be made without departing from the technical idea of the invention and the scope of the invention according to the common technical knowledge and the conventional means in the field.
Example 1:
referring to fig. 1, the embodiment discloses a complete set of controllable shear and pull resistant connecting pieces for a detachable steel-concrete composite beam bridge, which comprises a plurality of bolts 1 and a plurality of embedded pieces 2.
The embedded part 2 comprises an upper steel plate 201, a lower steel plate 202 and a steel pipe 203, wherein the cross section of the steel pipe 203 is a straight-edge ellipse.
Referring to fig. 3, the upper steel plate 201 and the lower steel plate 202 are both horizontally arranged, the upper steel plate 201 is located right above the lower steel plate 202, and one or more vertical steel pipes 203 are welded between the upper steel plate 201 and the lower steel plate 202. Fig. 3a shows a structure in which one steel pipe 203 is welded between the upper steel plate 201 and the lower steel plate 202, and fig. 3b shows a structure in which a plurality of steel pipes 203 are welded between the upper steel plate 201 and the lower steel plate 202.
Referring to fig. 6, through holes into which the steel pipes 203 extend are formed in the upper steel plate 201 and the lower steel plate 202, an upper port of the through hole of the upper steel plate 201 is provided with a groove, a lower port of the through hole of the lower steel plate 202 is provided with a groove, an upper end of the steel pipe 203 extends into the through hole of the upper steel plate 201 and is welded with the upper steel plate 201 through the groove, and a lower end of the steel pipe 203 extends into the through hole of the lower steel plate 202 and is welded with the lower steel plate 202 through the groove. The upper end and the lower end of the steel pipe 203 are respectively flush with the upper surface of the upper steel plate 201 and the lower surface of the lower steel plate 202, and the upper surface of the upper steel plate 201 and the lower surface of the lower steel plate 202 need to be polished.
Referring to fig. 4 or 5, a plurality of the embedded parts 2 are embedded in the precast concrete deck 3, and the lower surface of the lower steel plate 202 is flush with the lower surface of the precast concrete deck 3. The lower steel plate 202 is positioned below the reinforcing mesh of the precast concrete bridge deck 3, and the steel pipe 203 passes through the gap of the reinforcing mesh of the precast concrete bridge deck 3, i.e. the installation of the embedded part 2 does not cause the disconnection of the reinforcing steel of the precast concrete bridge deck 3, so that the continuity of the stressed reinforcing steel of the connection area is realized, and the connection area has better integrity.
A plurality of grooves 301 are formed in the upper surface of the precast concrete bridge deck 3, the size of each groove 301 is matched with that of the upper steel plate 201, and the upper steel plates 201 are installed at the bottoms of the grooves 301. The groove 301 is located above the reinforcing mesh of the precast concrete deck slab 3, that is, the reinforcing mesh is continuous at the groove 301, and the continuous stress of the reinforcing steel bars in the connection area can improve the overall stress performance of the shear key connection area.
All laminate vertical banding board 6 on every lateral wall of recess 301, mutual welding between the adjacent banding board 6, the lower limb of banding board 6 and upper portion steel sheet 201 welding, the upper surface of upper limb and precast concrete decking 3 flushes.
The steel beam 8 is an I-shaped steel, the lower ends of the bolts 1 and the upper flange of the steel beam 8 are welded in an arc welding mode, threads with a certain length are arranged at the upper ends of the bolts 1, the upper ends of the bolts 1 sequentially penetrate through a lower steel plate 202, a steel pipe 203 and an upper steel plate 201 of the corresponding embedded part 2, referring to fig. 2, a steel base plate 4 is installed on each bolt 1, a nut structure 5 is screwed, the lower surface of the steel base plate 4 is in contact with the upper steel plate 201, the upper surface of the steel base plate is in contact with the nut structure 5, and the top of each bolt 1 is located in a groove 301. The nut structure 5 comprises two nuts which are screwed into the bolts 1 and abut against each other, the nuts below abut against the steel base plate 4, and each nut is spot-welded with the corresponding bolt 1.
As shown in fig. 1, the straight edge of the cross section of the steel pipe 203 is parallel to the longitudinal direction of the steel beam 8, and the embedded parts 2 are distributed at equal intervals in the longitudinal direction of the steel beam 8.
The groove 301 is filled with an elastic material, and the elastic material is rubber, foam or asphalt.
The opening of the groove 301 is provided with a horizontal movable steel cover plate 7, the edge of the movable steel cover plate 7 is in contact with the edge sealing plate 6, the lower surface of the movable steel cover plate 7 is in contact with the top of the bolt 1, and the upper surface of the movable steel cover plate is flush with the upper surface of the concrete bridge deck plate 3.
When precast concrete decking 3 or girder steel 8 receive to destroy and need to change, open activity steel cover plate 7 clears away the elastic material in the recess 301, decomposes bolt 1 and nut structure 5's spot welding department, takes out steel backing plate 4 and nut structure 5, split precast concrete decking 3 and girder steel 8. When the precast concrete deck slab 3 needs to be replaced, the old precast concrete deck slab 3 is taken down, the new precast concrete deck slab 3 is installed on the steel beam 8, the bolts 1, the steel base plate 4 and the nut structures 5 are adopted for reconnection, the grooves 301 are filled with asphalt waterproof materials, and the movable steel cover plates 7 are installed. When the steel beam 8 needs to be replaced, the old steel beam 8 is taken down, the new steel beam 8 and the precast concrete bridge deck slab 3 are installed, the bolts 1, the steel base plate 4 and the nut structures 5 are adopted to be connected again, the grooves 301 are filled with elastic materials, and the movable steel cover plates 7 are installed well.
It should be noted that the connecting structure of the present embodiment can provide sufficient shear-resisting bearing capacity by using the friction force between the steel shim plate 4 and the upper surface of the upper steel plate 201.
Example 2:
the embodiment discloses a construction method of a complete set of controllable shear-resistant and anti-pulling connecting pieces of a detachable steel-concrete composite beam bridge in embodiment 1, which comprises the following steps:
1) a plurality of said bolts 1 are attached to a steel beam 8.
2) And embedding the embedded part 2 in the precast concrete bridge deck 3, and welding a sealing plate 6 on the upper surface of the upper steel plate 201.
3) And respectively passing a plurality of bolts 1 through the corresponding embedded parts 2.
4) And mounting a steel backing plate 4 on the bolt 1, screwing a nut structure 5, and performing spot welding on the nut structure 5 and the bolt 1.
5) And filling elastic materials in the groove 301, and installing the movable steel cover plate 7 at the opening of the groove 301.
Example 3:
referring to fig. 1, the embodiment discloses a complete set of controllable shear and pull resistant connecting pieces for a detachable steel-concrete composite beam bridge, which comprises a plurality of bolts 1 and a plurality of embedded pieces 2.
The embedded part 2 comprises an upper steel plate 201, a lower steel plate 202 and a steel pipe 203, wherein the cross section of the steel pipe 203 is a straight-edge ellipse.
Referring to fig. 3, the upper steel plate 201 and the lower steel plate 202 are both horizontally arranged, the upper steel plate 201 is located right above the lower steel plate 202, and one or more vertical steel pipes 203 are welded between the upper steel plate 201 and the lower steel plate 202. Fig. 3a shows a structure in which one steel pipe 203 is welded between the upper steel plate 201 and the lower steel plate 202, and fig. 3b shows a structure in which a plurality of steel pipes 203 are welded between the upper steel plate 201 and the lower steel plate 202.
Referring to fig. 6, through holes into which the steel pipes 203 extend are formed in the upper steel plate 201 and the lower steel plate 202, an upper port of the through hole of the upper steel plate 201 is provided with a groove, a lower port of the through hole of the lower steel plate 202 is provided with a groove, an upper end of the steel pipe 203 extends into the through hole of the upper steel plate 201 and is welded with the upper steel plate 201 through the groove, and a lower end of the steel pipe 203 extends into the through hole of the lower steel plate 202 and is welded with the lower steel plate 202 through the groove. The upper end and the lower end of the steel pipe 203 are respectively flush with the upper surface of the upper steel plate 201 and the lower surface of the lower steel plate 202, and the upper surface of the upper steel plate 201 and the lower surface of the lower steel plate 202 need to be polished.
Referring to fig. 4 or 5, a plurality of the embedded parts 2 are embedded in the precast concrete deck 3, and the lower surface of the lower steel plate 202 is flush with the lower surface of the precast concrete deck 3.
A plurality of grooves 301 are formed in the upper surface of the precast concrete bridge deck 3, the size of each groove 301 is matched with that of the upper steel plate 201, the upper steel plates 201 are installed at the bottoms of the grooves 301, and lubricating oil is uniformly coated on the upper surfaces of the upper steel plates 201.
All laminate vertical banding board 6 on every lateral wall of recess 301, mutual welding between the adjacent banding board 6, the lower limb of banding board 6 and upper portion steel sheet 201 welding, the upper surface of upper limb and precast concrete decking 3 flushes.
The steel beam 8 is an I-shaped steel, the lower ends of the bolts 1 and the upper flange of the steel beam 8 are welded in an arc welding mode, threads with a certain length are arranged at the upper ends of the bolts 1, the upper ends of the bolts 1 sequentially penetrate through a lower steel plate 202, a steel pipe 203 and an upper steel plate 201 of the corresponding embedded part 2, referring to fig. 2, a steel base plate 4 is installed on each bolt 1, a nut structure 5 is screwed, the lower surface of the steel base plate 4 is in contact with the upper steel plate 201, the upper surface of the steel base plate is in contact with the nut structure 5, and the top of each bolt 1 is located in a groove 301. The nut structure 5 comprises two nuts which are screwed into the bolts 1 and tightly abut against each other, the nuts below abut against the steel base plate 4, and each nut and the corresponding bolt 1 are subjected to spot welding.
As shown in fig. 1, the straight edge of the cross section of the steel pipe 203 is parallel to the longitudinal direction of the steel beam 8, and the embedded parts 2 are distributed at equal intervals in the longitudinal direction of the steel beam 8.
The groove 301 is filled with an elastic material, and the elastic material is rubber, foam or asphalt.
The opening of the groove 301 is provided with a horizontal movable steel cover plate 7, the edge of the movable steel cover plate 7 is in contact with the edge sealing plate 6, the lower surface of the movable steel cover plate 7 is in contact with the top of the bolt 1, and the upper surface of the movable steel cover plate is flush with the upper surface of the concrete bridge deck plate 3.
When precast concrete decking 3 or girder steel 8 receive to destroy and need to change, open activity steel cover plate 7 clears away the elastic material in the recess 301, decomposes bolt 1 and nut structure 5's spot welding department, takes out steel backing plate 4 and nut structure 5, split precast concrete decking 3 and girder steel 8. When the precast concrete deck slab 3 needs to be replaced, the old precast concrete deck slab 3 is taken down, the new precast concrete deck slab 3 is installed on the steel beam 8, lubricating oil is smeared, the bolt 1, the steel backing plate 4 and the nut structure 5 are adopted for reconnection, asphalt waterproof materials are filled in the groove 301, and the movable steel cover plate 7 is installed. When the steel beam 8 needs to be replaced, the old steel beam 8 is taken down, the new steel beam 8 and the precast concrete bridge deck slab 3 are installed, lubricating oil is smeared, the bolt 1, the steel base plate 4 and the nut structure 5 are adopted to be connected again, elastic materials are filled in the groove 301, and the movable steel cover plate 7 is installed well.
It is worth to be noted that, as the lubricating oil is uniformly coated on the upper surface of the upper steel plate 201, the steel backing plate 4 can slide on the upper steel plate 201, that is, the bolt 1 slides in the steel pipe 203 along the length direction of the steel beam 8, and the elastic material can provide a space for the sliding of the bolt 1, so that the longitudinal shear-resisting bearing capacity is reduced according to actual needs.
Example 4:
the embodiment discloses a construction method of a complete set of controllable shear-resistant and anti-pulling connecting pieces of a detachable steel-concrete composite beam bridge, which is described in embodiment 3, and the construction method comprises the following steps:
1) a plurality of said bolts 1 are attached to a steel beam 8.
2) The embedded parts 2 are embedded in the precast concrete bridge deck 3, the edge sealing plates 6 are welded on the upper surfaces of the upper steel plates 201, and lubricating oil is uniformly coated on the upper surfaces of the upper steel plates 201.
3) A plurality of bolts 1 are respectively inserted through the corresponding embedded parts 2.
4) And mounting a steel backing plate 4 on the bolt 1, screwing a nut structure 5, and performing spot welding on the nut structure 5 and the bolt 1.
5) And filling elastic materials in the groove 301, and installing the movable steel cover plate 7 at the opening of the groove 301.
Example 5:
referring to fig. 1, the embodiment discloses a complete set of controllable shear and pull resistant connecting pieces for a detachable steel-concrete composite beam bridge, which comprises a plurality of bolts 1 and a plurality of embedded pieces 2.
The embedded part 2 comprises an upper steel plate 201, a lower steel plate 202 and a steel pipe 203, wherein the cross section of the steel pipe 203 is a straight-edge ellipse.
Referring to fig. 3, the upper steel plate 201 and the lower steel plate 202 are both horizontally arranged, the upper steel plate 201 is located right above the lower steel plate 202, and one or more vertical steel pipes 203 are welded between the upper steel plate 201 and the lower steel plate 202. Fig. 3a shows a structure in which one steel pipe 203 is welded between the upper steel plate 201 and the lower steel plate 202, and fig. 3b shows a structure in which a plurality of steel pipes 203 are welded between the upper steel plate 201 and the lower steel plate 202.
Referring to fig. 6, through holes into which the steel pipes 203 extend are formed in the upper steel plate 201 and the lower steel plate 202, an upper port of the through hole of the upper steel plate 201 is provided with a groove, a lower port of the through hole of the lower steel plate 202 is provided with a groove, an upper end of the steel pipe 203 extends into the through hole of the upper steel plate 201 and is welded with the upper steel plate 201 through the groove, and a lower end of the steel pipe 203 extends into the through hole of the lower steel plate 202 and is welded with the lower steel plate 202 through the groove. The upper and lower ends of the steel pipe 203 are flush with the upper surface of the upper steel plate 201 and the lower surface of the lower steel plate 202, respectively, and the upper surface of the upper steel plate 201 and the lower surface of the lower steel plate 202 need to be polished flat.
Referring to fig. 4 or 5, a plurality of the embedded parts 2 are embedded in the precast concrete deck 3, and the lower surface of the lower steel plate 202 is flush with the lower surface of the precast concrete deck 3.
A plurality of grooves 301 are formed in the upper surface of the precast concrete bridge deck 3, the size of each groove 301 is matched with that of the upper steel plate 201, and the upper steel plates 201 are installed at the bottoms of the grooves 301.
All laminate vertical banding board 6 on every lateral wall of recess 301, mutual welding between the adjacent banding board 6, the lower limb of banding board 6 and upper portion steel sheet 201 welding, the upper surface of upper limb and precast concrete decking 3 flushes.
The steel beam 8 is an I-shaped steel, the lower ends of the bolts 1 and the upper flange of the steel beam 8 are welded in an arc welding mode, threads with a certain length are arranged at the upper ends of the bolts 1, the upper ends of the bolts 1 sequentially penetrate through a lower steel plate 202, a steel pipe 203 and an upper steel plate 201 of the corresponding embedded part 2, referring to fig. 2, a steel base plate 4 is installed on each bolt 1, a nut structure 5 is screwed, the lower surface of the steel base plate 4 is in contact with the upper steel plate 201, the upper surface of the steel base plate is in contact with the nut structure 5, and the top of each bolt 1 is located in a groove 301. The nut structure 5 comprises two nuts which are screwed into the bolts 1 and tightly abut against each other, the nuts below abut against the steel base plate 4, and each nut and the corresponding bolt 1 are subjected to spot welding.
And a plurality of layers of plastic films are paved on the plate surface of the steel base plate 4 contacted with the upper steel plate 201.
As shown in fig. 1, the straight sides of the cross section of the steel pipes 203 are parallel to the longitudinal direction of the steel beam 8, and the embedded parts 2 are distributed at equal intervals in the longitudinal direction of the steel beam 8.
The groove 301 is filled with an elastic material, and the elastic material is rubber, foam or asphalt.
The opening of the groove 301 is provided with a horizontal movable steel cover plate 7, the edge of the movable steel cover plate 7 is in contact with the edge sealing plate 6, the lower surface of the movable steel cover plate 7 is in contact with the top of the bolt 1, and the upper surface of the movable steel cover plate is flush with the upper surface of the concrete bridge deck plate 3.
When precast concrete decking 3 or girder steel 8 receive to destroy and need to change, open activity steel cover plate 7 clears away the elastic material in the recess 301, decomposes bolt 1 and nut structure 5's spot welding department, takes out steel backing plate 4 and nut structure 5, split precast concrete decking 3 and girder steel 8. When the precast concrete deck slab 3 needs to be replaced, the old precast concrete deck slab 3 is taken down, the new precast concrete deck slab 3 is installed on the steel beam 8, the plastic film is laid, the bolt 1, the steel backing plate 4 and the nut structure 5 are adopted for reconnection, the groove 301 is filled with the asphalt waterproof material, and the movable steel cover plate 7 is installed. When the steel beam 8 needs to be replaced, the old steel beam 8 is taken down, the new steel beam 8 and the precast concrete bridge deck slab 3 are installed, the plastic film is laid, the bolt 1, the steel base plate 4 and the nut structure 5 are adopted to be connected again, the elastic material is filled in the groove 301, and the movable steel cover plate 7 is installed.
It is worth to be noted that, because the multilayer plastic film is laid on the plate surface of the steel base plate 4 contacting with the upper steel plate 201, the steel base plate 4 can slide on the upper steel plate 201, that is, the bolt 1 slides in the steel pipe 203 along the length direction of the steel beam 8, and the elastic material can provide a space for the sliding of the bolt 1, so that the longitudinal shear-resisting bearing capacity is reduced according to the actual requirement.
Example 6:
the embodiment discloses a construction method of a complete set of controllable shear-resistant and anti-pulling connecting pieces of the detachable steel-concrete composite beam bridge, which is described in embodiment 5, and the construction method comprises the following steps:
1) a plurality of said bolts 1 are attached to a steel beam 8.
2) And embedding the embedded part 2 in the precast concrete bridge deck 3, and welding a sealing plate 6 on the upper surface of the upper steel plate 201.
3) And respectively passing a plurality of bolts 1 through the corresponding embedded parts 2.
4) And mounting a steel backing plate 4 on the bolt 1, screwing a nut structure 5, and performing spot welding on the nut structure 5 and the bolt 1. Wherein, the lower plate surface of the steel backing plate 4 is laid with a plurality of layers of plastic films, and the plastic films are contacted with the upper surface of the upper steel plate 201.
5) And filling elastic materials in the groove 301, and installing the movable steel cover plate 7 at the opening of the groove 301.
Claims (10)
1. The utility model provides a can dismantle controllable just resistance to plucking connecting piece of steel-concrete composite beam bridge complete set which characterized in that: the bolt comprises a plurality of bolts (1) and a plurality of embedded parts (2);
the embedded part (2) comprises an upper steel plate (201), a lower steel plate (202) and a plurality of steel pipes (203), and the cross sections of the steel pipes (203) are straight-edge ellipses;
the upper steel plate (201) and the lower steel plate (202) are both horizontally arranged, the upper steel plate (201) is positioned right above the lower steel plate (202), and a plurality of vertical steel pipes (203) are welded between the upper steel plate (201) and the lower steel plate (202);
the embedded parts (2) are embedded in the precast concrete bridge deck (3), and the lower surface of the lower steel plate (202) is flush with the lower surface of the precast concrete bridge deck (3);
the upper surface of the precast concrete bridge deck (3) is provided with a plurality of grooves (301), the sizes of the grooves (301) are matched with the sizes of the upper steel plates (201), and the upper steel plates (201) are arranged at the bottoms of the grooves (301);
the lower ends of the bolts (1) are connected with the upper surface of the steel beam (8), the upper ends of the bolts sequentially penetrate through a lower steel plate (202), a steel pipe (203) and an upper steel plate (201) of the corresponding embedded part (2), a steel base plate (4) is installed on each bolt (1) and a nut structure (5) is screwed, the lower surface of the steel base plate (4) is in contact with the upper steel plate (201), the upper surface of the steel base plate is in contact with the nut structure (5), and the top of each bolt (1) is located in the groove (301);
the groove (301) is filled with an elastic material.
2. The set of controllable shear and pull resistant connectors for detachable steel-concrete composite beam bridges of claim 1, wherein: lubricating oil is uniformly coated on the upper surface of the upper steel plate (201).
3. The set of controllable shear and pull resistant connectors for the detachable steel-concrete composite beam bridge according to claim 1 or 2, wherein: and a plurality of layers of plastic films are paved on the surface of the steel base plate (4) which is in contact with the upper steel plate (201).
4. The set of controllable shear and pull resistant connectors for the detachable steel-concrete composite beam bridge according to claim 1 or 3, wherein: vertical edge sealing plates (6) are attached to each side wall of the groove (301), adjacent edge sealing plates (6) are welded to each other, the lower edges of the edge sealing plates (6) are welded to the upper steel plate (201), and the upper edges of the edge sealing plates are flush with the upper surface of the precast concrete bridge deck (3).
5. The set of controllable shear and pull resistant connectors for the detachable steel-concrete composite beam bridge according to claim 4, wherein: horizontal movable steel cover plate (7) are installed at the opening of groove (301), the edge of movable steel cover plate (7) contacts with edge sealing plate (6), the lower surface of movable steel cover plate (7) contacts with the tops of a plurality of bolts (1), and the upper surface flushes with the upper surface of concrete bridge deck plate (3).
6. The set of controllable shear and pull resistant connectors for detachable steel-concrete composite beam bridges of claim 1, wherein: a plurality of through holes for the steel pipes (203) to stretch into are formed in the upper steel plate (201) and the lower steel plate (202), a groove is formed in an upper end opening of each through hole of the upper steel plate (201), a groove is formed in a lower end opening of each through hole of the lower steel plate (202), the upper ends of the steel pipes (203) stretch into the through holes of the upper steel plate (201) and are welded with the upper steel plate (201) through the grooves, and the lower ends of the steel pipes (203) stretch into the through holes of the lower steel plate (202) and are welded with the lower steel plate (202) through the grooves.
7. The set of controllable shear and pull resistant connectors for detachable steel-concrete composite beam bridges of claim 1, wherein: the nut structure (5) comprises two nuts which are screwed into the bolts (1) and tightly abut against each other, and the nuts below abut against the steel base plate (4).
8. The set of controllable shear and pull resistant connectors for a detachable steel-concrete composite beam bridge according to claim 7, wherein: and each nut and the bolt (1) are subjected to spot welding.
9. The set of controllable shear and pull resistant connectors for detachable steel-concrete composite beam bridges of claim 1, wherein: the steel beam (8) is I-shaped steel, and the upper flange of the bolt (1) and the upper flange of the steel beam (8) are welded in an arc welding mode.
10. The construction method of the complete set of controllable shear-resistant and pull-resistant connecting pieces for the detachable steel-concrete composite beam bridge according to any one of claims 1 to 9, is characterized by comprising the following steps:
1) connecting a number of said bolts (1) to a steel beam (8);
2) embedding the embedded part (2) in the precast concrete bridge deck (3), and welding an edge sealing plate (6) on the upper surface of the upper steel plate (201);
3) respectively penetrating a plurality of bolts (1) through the corresponding embedded parts (2);
4) mounting a steel backing plate (4) on the bolt (1), screwing a nut structure (5), and performing spot welding on the nut structure (5) and the bolt (1);
5) elastic materials are filled in the groove (301), and the movable steel cover plate (7) is arranged at the opening of the groove (301).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210555820.1A CN114808666A (en) | 2022-05-20 | 2022-05-20 | Complete set of controllable shear-resistant and pull-resistant connecting piece for detachable steel-concrete composite beam bridge and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210555820.1A CN114808666A (en) | 2022-05-20 | 2022-05-20 | Complete set of controllable shear-resistant and pull-resistant connecting piece for detachable steel-concrete composite beam bridge and construction method thereof |
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| CN114808666A true CN114808666A (en) | 2022-07-29 |
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| CN202210555820.1A Pending CN114808666A (en) | 2022-05-20 | 2022-05-20 | Complete set of controllable shear-resistant and pull-resistant connecting piece for detachable steel-concrete composite beam bridge and construction method thereof |
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