CN110644355B - Module type steel expansion joint and working process thereof - Google Patents
Module type steel expansion joint and working process thereof Download PDFInfo
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- CN110644355B CN110644355B CN201910926500.0A CN201910926500A CN110644355B CN 110644355 B CN110644355 B CN 110644355B CN 201910926500 A CN201910926500 A CN 201910926500A CN 110644355 B CN110644355 B CN 110644355B
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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
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/065—Joints having sliding plates
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Abstract
The invention discloses a modular steel expansion joint and a working process thereof.A plurality of middle comb plates are arranged side by side and are arranged above a bottom backing plate, the lower end of each middle comb plate is in threaded connection with a middle screw shaft, the lower end of the middle screw shaft is rotatably connected with the bottom backing plate, and the lower end of the middle screw shaft is coaxially provided with a gear; one end of the sliding strip is connected with the bottom cushion plate in a sliding mode, a tooth hammer is arranged at the end of the sliding strip, and when the sliding strip slides, the tooth hammer can drive a gear at the lower end of the middle spiral shaft to rotate; the other end of the sliding strip is hinged with the second main beam; the side comb plate is arranged on one side of the middle comb plate, the tail comb plate and the steel strap plate are positioned on the other side of the middle comb plate, the side comb plate is fixedly connected with the first main beam, and the rotating shaft plate is fixedly arranged on the second main beam and is connected with the steel strap plate shaft; the tail comb plate is arranged on the bottom base plate, and one end of the steel lapping plate is lapped on the tail comb plate. The invention solves the problems that the bridge structure cannot be smoothly and excessively deformed under the action of temperature, shrinkage and creep, and the driving is uncomfortable.
Description
Technical Field
The invention relates to the field of bridge engineering, in particular to a modular steel expansion joint and a working process thereof.
Background
In order to meet the requirement of bridge deck deformation, expansion joints are usually provided between two beam ends, between a beam end and an abutment, or at the hinge joint of a bridge. The expansion joint is required to freely expand and contract in two directions parallel to and perpendicular to the axis of the bridge, and the expansion joint is firm and reliable, and when a vehicle runs, the vehicle is smooth and free of sudden jump and noise. The bridge expansion joints function to accommodate displacements and couplings between the superstructure caused by vehicle loads and the bridge. Once the telescopic device is damaged, the speed, comfort and safety of the vehicle are seriously influenced, and even a vehicle safety accident is caused. The existing expansion joints mostly adopt a general butt joint type or modulus type expansion device, a rubber combined shear type bridge expansion joint, a seamless bridge expansion joint and the like; the butt joint type expansion joint is used for a conventional bridge with the expansion amount of below 80mm, the bridge is not seamless, and criss-cross grooves exist, so that the driving comfort is influenced to a certain extent; the rubber strip is generally left in the middle of the modulus type telescopic device, so that the modulus type telescopic device is easy to age and damage, and the V-shaped groove influences the driving comfort; the seamless bridge expansion joint is a structure that when the joint structure does not extend out of the bridge surface, elastic materials are filled in the expansion gaps at the ends of the bridge and waterproof materials are paved, then viscoelastic composite materials are paved on the bridge deck pavement layer, so that the bridge deck pavement and other pavement parts at the expansion joint position form a continuous body, and the expansion is borne by the deformation of materials such as asphalt concrete and the like of the joint; the composite material has high relative cost, is not popularized and used in a large range, and has questionable economy.
Disclosure of Invention
The invention aims to provide a modular steel expansion joint and a working process thereof, which aim to solve the problem that a bridge structure is easy to deform under the action of temperature, contraction and creep.
The technical scheme adopted by the invention is as follows:
a modular steel expansion joint is used for adjusting displacement and connection between a first main beam and a second main beam and comprises the first main beam, the second main beam, a side comb plate, a middle comb plate, a tail comb plate, a steel butt strap, a bottom cushion plate, a rotating shaft plate and a sliding strip, wherein the bottom cushion plate is fixedly arranged on the first main beam; the plurality of middle comb plates are arranged along the seam width direction and arranged side by side; the middle comb plate is arranged above the bottom base plate, the lower end of each middle comb plate is in threaded connection with a middle screw shaft, the lower end of each middle screw shaft is rotatably connected with the bottom base plate, and the lower end of each middle screw shaft is coaxially provided with a gear;
one end of the sliding strip is connected with the bottom cushion plate in a sliding mode, a tooth hammer capable of being meshed with the gear is arranged at the end of the sliding strip, the tooth hammer adopts a section of rack, and when the sliding strip slides, the tooth hammer can drive the gear at the lower end of the middle spiral shaft to rotate; when the slide bar slides to the bottom backing plate, the middle screw shaft rotates and enables the middle comb plate to move downwards; when the slide bar slides towards the direction far away from the bottom cushion plate, the middle screw shaft rotates and enables the middle comb plate to move upwards; the other end of the sliding strip is hinged with the second main beam;
the side comb plate is arranged on one side of the middle comb plate, the tail comb plate and the steel strap plate are positioned on the other side of the middle comb plate, the side comb plate is fixedly connected with the first main beam, and the rotating shaft plate is fixedly arranged on the second main beam and is connected with the steel strap plate shaft; the tail comb plate is arranged on the bottom base plate, and one end of the steel lapping plate is lapped on the tail comb plate.
The structure of the middle comb plate is divided into an upper layer and a lower layer, the upper layer is a W-shaped steel bar, the lower layer is rectangular long steel bar, the rectangular long steel bar is provided with a threaded spiral through hole every preset distance, and the upper end of the middle spiral shaft is connected with the spiral through hole in a matched mode; the upper layer and the lower layer are of an integral structure; between two adjacent comb plates, the W-shaped steel bars on the upper layer are embedded into each other.
Well fishback upper W shape steel bar both sides set up rubber strip one, and rubber strip one is arranged in sealed waterproof and prevent that the gap is too big to cause silt to block up between the adjacent well fishback between the adjacent fishback.
The side comb plate comprises a rectangular steel plate, one side of the upper part of the rectangular steel plate, which is close to the middle comb plate, is provided with a comb-shaped structure, and the comb-shaped structure is W-shaped and is matched with the W-shaped steel bar in shape; the rectangular steel plate is fixedly connected with the bottom base plate and the first main beam.
One side of the dentate structure, which is close to the middle comb plate, is provided with a rubber strip.
The steel lapping plate is a steel plate with a comb tooth structure at the edge; the comb tooth structure faces one side of the middle comb plate, the comb tooth structure faces the direction of the middle comb plate, and the thickness of the comb tooth structure is gradually reduced; the end part of the comb tooth structure is provided with a second rubber strip.
The thickness of the comb tooth structure towards one side edge of the middle comb tooth plate is half of the normal section of the steel lapping plate.
The bottom plate is a U-shaped steel plate, and the bottom edge of the bottom plate is fixed to the first main beam; the plurality of middle comb plates are arranged on the bottom edge of the bottom cushion plate and positioned between the two wing edges of the bottom cushion plate; the lower end of the middle spiral shaft is rotatably connected with the bottom edge of the bottom cushion plate; the bottom edge of the bottom base plate is provided with a slideway for the slide strip to slide.
The slideway comprises a sliding groove and a stop block for limiting the sliding strip, the sliding groove is connected with the sliding strip in a matching way, and the sliding groove and the stop block are welded with the bottom edge of the bottom base plate; the slide bar is connected with the second main beam through a half hoop.
The working process of the modular steel expansion joint comprises the following steps: the first main beam and the second main beam move relatively, so that the distance between the first main beam and the second main beam becomes smaller or larger;
when the distance between the first main beam and the second main beam is reduced, the second main beam drives the sliding strip and the steel butt strap to move towards the first main beam, the tooth hammer drives the middle screw shaft to rotate, the middle screw shaft rotates to enable the middle comb plate to move downwards, a space is reserved for the steel butt strap after the middle comb plate moves downwards, and the steel butt strap is just lapped on the correspondingly lowered middle comb plate;
when the distance between the first main beam and the second main beam is increased, the second main beam drives the sliding strip and the steel access plate to move in the direction far away from the first main beam, the tooth hammer drives the middle screw shaft to rotate, the middle screw shaft rotates to enable the middle comb plate to move upwards, the space reserved after the steel access plate moves is filled after the middle comb plate moves upwards, and the steel access plate is just lapped on the corresponding descending middle comb plate.
The invention has the following beneficial effects:
in the modular steel expansion joint, the lower end of each middle comb plate is in threaded connection with a middle screw shaft, the lower end of the middle screw shaft is rotatably connected with a bottom cushion plate, and the lower end of the middle screw shaft is coaxially provided with a gear; one end of the sliding strip is connected with the bottom cushion plate in a sliding mode, a tooth hammer capable of being meshed with the gear is arranged at the end of the sliding strip, and when the sliding strip slides, the tooth hammer can drive the gear at the lower end of the middle spiral shaft to rotate; when the slide bar slides towards the bottom base plate (namely, when the gap between the first main beam and the second main beam is reduced), the middle screw shaft rotates and enables the middle comb plate to move downwards, at the moment, a space is reserved for the steel butt strap after the middle comb plate moves downwards, and the steel butt strap is just lapped on the correspondingly lowered middle comb plate; when the slide bar slides in the direction far away from the bottom base plate, the middle screw shaft rotates and enables the middle comb plate to move upwards, at the moment, the middle comb plate moves upwards to fill the space reserved after the steel butt plate moves, and the steel butt plate is just lapped on the correspondingly descending middle comb plate; the working principle ensures that the joint between the first main beam and the second main beam can be gentle and excessive, the joint is smooth, and the requirement on driving comfort is met.
The working process of the modular steel expansion joint ensures that the joint between the first main beam and the second main beam can be in gradual transition, so that a travelling crane can stably pass through the joint between the first main beam and the second main beam, and the travelling comfort is ensured.
Drawings
FIG. 1 is a connection diagram of a modular steel expansion joint device according to the present invention;
FIG. 2 is a first three-dimensional structural view of the modular steel expansion joint assembly of the present invention;
FIG. 3 is a second three-dimensional structural view of the modular steel expansion joint assembly of the present invention;
FIG. 4 is a side view of the modular steel expansion joint assembly of the present invention;
FIG. 5 is a first internal view of the modular steel expansion joint assembly of the present invention;
FIG. 6 is a second internal view of the modular steel expansion joint assembly of the present invention;
FIG. 7 is a third internal view of the modular steel expansion joint assembly of the present invention;
FIG. 8 is a view showing the installation position of the anchoring pad block in the modular steel expansion joint device of the present invention
Fig. 9 is a schematic view of a plurality of middle comb plates in the modular steel expansion joint device of the present invention after being combined;
FIG. 10 is a three-dimensional structure of the insole board in the modular steel expansion joint device of the present invention;
FIG. 11 is a detailed view of the bottom plate of the modular steel expansion joint device of the present invention;
FIG. 12 is a schematic view showing the connection of screw shafts in the modular steel expansion joint device of the present invention;
FIG. 13 is a schematic view showing the connection of side screw shafts in the modular steel expansion joint device of the present invention;
FIG. 14 is a diagram showing the relative positions of the slide bar and the slide way in the modular steel expansion joint device of the present invention;
FIG. 15 is a three-dimensional structural view of a steel strap in the modular steel expansion joint assembly of the present invention;
FIG. 16 is a detail view of the steel strap of the modular steel expansion joint assembly of the present invention;
FIG. 17 is a three-dimensional structural view of a side comb plate in the modular steel expansion joint device of the present invention;
FIG. 18 is a detail view of the side comb plate of the modular steel expansion joint device of the present invention;
FIG. 19 is a three-dimensional configuration of a comb plate in the modular steel expansion joint device of the present invention;
FIG. 20 is a detailed structural view of a comb plate in the modular steel expansion joint device of the present invention;
FIG. 21 is a detailed view of the pivot plate of the modular steel expansion joint assembly of the present invention;
FIG. 22 is a schematic view of the connection of the pivot plate in the modular steel expansion joint apparatus of the present invention;
in the figure, 1-a first main beam, 2-a second main beam, 3-a steel butt strap, 4-a comb plate, 4-a rectangular steel plate, 4-a 2-a comb tooth structure, 5-a middle comb plate, 6-a base plate, 7-a rotating shaft plate, 8-a slide bar, 9-a threaded steel bar, 10-an anchoring cushion block, 11-a second threaded steel bar, 12-an edge screw shaft, 13-a middle screw shaft, 14-a slide rail, 15-a first rubber bar, 16-a pin shaft, 17-a half hoop, 18-a second rubber bar, 19-a rectangular long steel bar, 20-a spiral through hole, 21-a W-shaped steel bar, 22-a slide groove, 23-a stop block, 24-a hammer, 25-a guide rod, 26-a half hoop through hole, 27-a U-shaped steel plate, 28-a threaded steel bar through hole, 29-pin shaft groove, 30-tail comb plate, 31-nut, 32-twisted steel bar, three and 33-gear.
Detailed Description
The invention is further described below with reference to the figures and examples.
Referring to fig. 1 to 7, the modular steel expansion joint of the present invention is used for adjusting the displacement and connection between a primary beam 1 and a secondary beam 2, and includes a side comb plate 4, a middle comb plate 5, a tail comb plate 30, a steel strap 3, a bottom plate 6, a rotating shaft plate 7 and a slide bar 8, wherein the bottom plate 6 is fixedly installed on the primary beam 1; a plurality of middle comb plates 5 are arranged along the seam width direction, and a plurality of middle comb plates 5 are arranged side by side; the plurality of middle comb plates 5 are arranged above the bottom cushion plate 6, the lower end of each middle comb plate 5 is in threaded connection with a middle screw shaft 13, the lower end of each middle screw shaft 13 is rotatably connected with the bottom cushion plate 6, and the lower end of each middle screw shaft 13 is coaxially provided with a gear 33; one end of the slide bar 8 is connected with the bottom cushion plate 6 in a sliding manner, the end of the slide bar 8 is provided with a tooth hammer 24 which can be meshed with the gear 33, the tooth hammer 24 adopts a section of rack, and when the slide bar 8 slides, the tooth hammer 24 can drive the gear 33 at the lower end of the middle screw shaft 13 to rotate; when the slide bar 8 slides towards the bottom cushion plate 6, the middle screw shaft 13 rotates and enables the middle comb plate 5 to move downwards; when the slide bar 8 slides in the direction far away from the bottom cushion plate 6, the middle screw shaft 13 rotates and enables the middle comb plate 5 to move upwards; the other end of the sliding strip 8 is hinged with the second main beam 2; the side comb plate 4 is arranged on one side of the middle comb plate 5, the tail comb plate 30 and the steel strap 3 are positioned on the other side of the middle comb plate 5, the side comb plate 4 is fixedly connected with the main beam I1, and the rotating shaft plate 7 is fixedly arranged on the main beam II 2 and is connected with the steel strap 3 through a shaft; the tail comb plate 30 is arranged on the bottom base plate 6, and one end of the steel lapping plate 3 is lapped on the tail comb plate 30.
When the modular steel expansion joint works, the modular steel expansion joint comprises the following components: the first main beam 1 and the second main beam 2 move relatively, so that the distance between the first main beam 1 and the second main beam 2 becomes smaller or larger;
when the distance between the first main beam 1 and the second main beam 2 is smaller, the second main beam 2 drives the sliding strip 8 and the steel access plate 3 to move towards the first main beam 1, the tooth hammer 24 drives the middle screw shaft 13 to rotate, the middle screw shaft 13 rotates to enable the middle comb plate 5 to move downwards, a space is reserved for the steel access plate 3 after the middle comb plate 5 moves downwards, and the steel access plate 3 is just lapped on the corresponding descending middle comb plate 5;
when the distance between the first main beam 1 and the second main beam 2 is increased, the second main beam 2 drives the sliding strip 8 and the steel attachment strap 3 to move in the direction away from the first main beam 1, the tooth hammer 24 drives the middle screw shaft 13 to rotate, the middle screw shaft 13 rotates to enable the middle comb plate 5 to move upwards, the space reserved after the steel attachment strap 3 moves is filled after the middle comb plate 5 moves upwards, and the steel attachment strap 3 is just lapped on the corresponding descending middle comb plate 5.
As a preferred embodiment of the present invention, referring to fig. 1 to 4, 19 and 20, the structure of the middle comb plate 5 of the present invention is divided into an upper layer and a lower layer, wherein the upper layer is a W-shaped steel bar 21, the lower layer is a rectangular long steel bar 19, the rectangular long steel bar 19 is provided with a threaded spiral through hole 20 at intervals of a predetermined distance, and the upper end of the middle spiral shaft 13 is connected with the spiral through hole 20 in a matching manner; the upper layer and the lower layer are of an integral structure; between two adjacent middle comb plates 5, the upper W-shaped steel bars 21 are embedded into each other.
As a preferred embodiment of the present invention, as shown in fig. 20, rubber strips 15 are arranged on both sides of the W-shaped steel strip on the upper layer of the middle comb plate 5, and the rubber strips 15 are used for sealing and waterproofing between the adjacent middle comb plates 5 and preventing the blockage of the gaps between the adjacent middle comb plates 5 by the excessive silt.
As a preferred embodiment of the present invention, referring to fig. 1 to 6, 17 and 18, the side comb plate 4 comprises a rectangular steel plate, a comb-tooth-shaped structure 4-2 is arranged on one side of the upper part of the rectangular steel plate 4-1 close to the middle comb plate 5, and the comb-tooth-shaped structure 4-2 is W-shaped and is adapted to the W-shaped steel bar 21; the rectangular steel plate 4-1 is fixedly connected with the bottom cushion plate 6 and the first main beam 1.
As a preferred embodiment of the invention, the side of the tooth-like structure 4-2 close to the middle comb plate 5 is provided with a rubber strip.
Referring to fig. 1, 2, 4 and 16, as a preferred embodiment of the present invention, the steel attachment plate 3 is a steel plate having a comb-tooth structure at its edge; the comb tooth structure faces one side of the middle comb plate 5, and the thickness of the comb tooth structure is gradually reduced towards the direction of the middle comb plate 5; the end part of the comb tooth structure is provided with a second rubber strip 18.
As a preferred embodiment of the invention, the thickness of the comb structure towards one side edge of the middle comb plate 5 is half of the normal section of the steel butt strap 3.
Referring to fig. 1 to 3, 5 to 7, 10, 11 and 14, as a preferred embodiment of the present invention, the bottom plate 6 is a U-shaped steel plate 27, and the bottom edge of the bottom plate 6 is fixed to the first main beam 1; the plurality of middle comb plates 5 are arranged on the bottom edge of the bottom base plate 6 and positioned between two wing edges of the bottom base plate 6; the lower end of the middle spiral shaft 13 is rotatably connected with the bottom edge of the bottom cushion plate 6; the bottom edge of the bottom cushion plate 6 is provided with a slide way 14 for the slide strip 8 to slide.
As a preferred embodiment of the present invention, referring to fig. 5 to 7, 11 and 14, the slide way 14 includes a slide groove 22 and a stopper 23 for limiting the slide bar 8, the slide groove 22 is adapted to the slide bar 8, and the slide groove 22 and the stopper 23 are welded to the bottom edge of the bottom plate 6; referring to fig. 8, the slide bar 8 is connected with the second main beam 2 through a semi-hoop 17.
In the invention, the first main beam 1 and the second main beam 2 are the end parts of two couplings of a concrete bridge. The side comb plate 4 and the middle comb plate 5 work together to complete the adjustment of the width of the expansion joint.
Examples
The modular steel expansion joint device of the present embodiment includes an edge comb plate 4 and six middle comb plates 5. The side comb plate 4 is of a special-shaped structure, the comb-shaped structure 4-2 is arranged at the front section (namely, one end facing the middle comb plate 5), the thickness of the comb-shaped structure 4-2 is 10mm, a rubber strip I15 is attached to the front edge of the comb-shaped structure 4-2, and the rubber strip I15 and the comb-shaped structure 4-2 are reliably bonded by adopting reliable hot melt adhesive bonding. The comb-shaped structure 4-2 of the side comb plate 4 is welded with the rectangular steel plate 4-1, the thickness of the rectangular steel plate 4-1 is 14mm, a single row of threaded reinforcing steel bars 9 with the diameter of 28cm of HRB400 are welded on one side, facing the main beam 1, of the rectangular steel plate 4-1, the distance between the threaded reinforcing steel bars 9 is 30cm, and the length of the threaded reinforcing steel bars 9 extending into the main beam 1 is 112 cm. The structure is shown in detail in fig. 2, 3, 5 and 6. The first rubber strip 15 is made of natural rubber and is 5mm thick.
As shown in fig. 20, the middle comb plate 5 has a special-shaped structure and is divided into an upper layer and a lower layer, the upper layer is a W-shaped steel bar 21, and the W-shaped steel bar 21 has a solid structure. The lower layer is rectangular long steel bars 19, the rectangular long steel bars 19 are provided with spiral through holes 20 with threads at intervals, and the spiral through holes 20 are in threaded connection with the upper end of the middle spiral shaft 13. Two sides of the W-shaped steel bar 21 on the upper layer of the middle comb plate 5 are provided with a first rubber strip 15, and the first rubber strip 15 is reliably bonded with the W-shaped steel bar 21 by adopting reliable hot melt adhesive bonding. The upper layer and the lower layer are of an integral structure. The upper layer is 20mm thick, and the lower layer is 40mm thick.
The bottom cushion plate 6 is of a special-shaped structure, and the bottom cushion plate 6 is made of a U-shaped steel plate 27. The thickness of the U-shaped steel plate 27 is 25mm, a plurality of rows of threaded steel bars 11 are welded to the lower portion of a bottom plate of the U-shaped steel plate 27 (as shown in fig. 3), and the bottom cushion plate 6 is fixedly connected with the main beam 1 through the threaded steel bars 11. The second twisted steel 11 adopts a phi 28cm steel of HRB400, the distance is 30cm, and the length of the second twisted steel 11 extending into the first main beam 1 is 112 cm.
As shown in fig. 11 and 14, the slide way 14 is a special-shaped structure and is composed of a chute 22 and a stop 23; the slide groove 22 is hollow and open, and the stopper 23 is a solid hexahedron. The chute 22 and the stop block 23 are made of Q345 steel; the slide groove 22 and the stopper 23 are welded to the bottom plate 6, and the slide groove 22 serves as a moving track of the slide bar 8.
The slide bar 8 is of a special-shaped structure, and the tooth hammer 24 and the guide rod 25 of the slide bar 8 are made of Q345 steel. The toothed hammer 24 adopts a section of rack; the guide rod 25 has an inverted T-shaped cross section. The tooth hammers 24 are located at the ends of the guide rods 25. The other end of the guide rod 25 is provided with a semi-hoop through hole 26, the semi-hoop through hole 26 is connected with a semi-hoop 17, the semi-hoop 17 is connected with the anchoring cushion block 10, and the anchoring cushion block 10 is installed on the second main beam 2.
The guide 25 of the slide 8 engages the slot 22 of the slideway 14 to enable relative movement of the slide 8 on the slideway 14. The slide 8 cannot be disengaged from the slide 14 due to the presence of the stop 23, see in detail fig. 14.
As shown in fig. 16, the steel attachment plate 3 is a steel plate with comb teeth on the edge, the comb teeth are the upper right corner part of the steel attachment plate 3 shown in fig. 16, the lower right corner part of the steel attachment plate 3 shown in fig. 16 is a normal thickness part, the thickness is 20mm, a second rubber strip 18 is arranged on the comb teeth side, and the second rubber strip 18 is made of natural rubber and is 5mm thick. And the reliable hot melt adhesive is adopted for bonding so as to ensure that the steel butt strap is reliably bonded with the steel butt strap 3. The thickness of the comb tooth side structure of the steel attachment strap 3 becomes thinner gradually (the thickness of the steel attachment strap 3 shown in fig. 16 becomes thinner gradually from the lower right corner to the upper left corner), and the thickness of the comb tooth part is half of the thickness of the normal section, namely 10mm, so that the steel attachment strap 3 can freely move back and forth on the middle comb plate 5 without being hindered. As shown in figure 16, a single row of pin shafts 16 is arranged on one side of the steel access plate 3 away from the comb teeth, the single row of pin shafts 16 are connected with the steel access plate 3 in a welding mode, and the pin shafts 16 are arranged at intervals of 50 cm. The pin 16 is arranged on the bottom side in the thickness direction of the steel strap 3.
As shown in fig. 5 to 7 and 12, the middle screw shaft 13 has a structure with a gear in the middle. As shown in FIG. 12, the bottom of the middle screw shaft 13 is enlarged and rounded. The side screw axes 12 differ from the middle screw axis 13 in that the middle portion has no tooth-like structure. The bottom parts of the middle screw shaft 13 and the side screw shafts 12 are embedded in the bottom plate of the bottom cushion plate 6 and can rotate freely. The middle screw shafts 13 are arranged in a plurality of rows and a plurality of columns. The number of rows is one less than the number of the comb plates 5. The side screw shafts 12 are arranged on one side of the bottom cushion plate 6 close to the anchoring cushion block 10, and are arranged in a plurality of rows and a column. The tooth-like structure of the middle screw shaft 13 and the tooth hammer 24 move in mesh with each other.
As shown in fig. 22, the rotating shaft plate 7 is used for connecting the main beam 2 and the steel access plate 3. The rotating shaft plate 7 is provided with a threaded rib through hole 28 and a pin shaft groove 29, the rotating shaft plate 7 is fixedly connected with the second main beam 2 through a third threaded rib 32, a nut 31 and the threaded rib through hole 28, and the rotating shaft plate 7 is connected with the pin shaft 16 through the pin shaft groove 29. The pin shaft groove 29 is positioned at the bottom of the rotating shaft plate 7, and the pin shaft groove 29 and the pin shaft 16 are mutually matched.
When the modular steel expansion joint device is used, an expansion joint module is formed by the side comb plate 4 and the plurality of middle comb plates 5; the side comb plate 4 is pre-embedded into the main beam 1 in advance, and the threaded steel bars 9 on the side comb plate 4 extend into the main beam 1.
The bottom base plate 6 is embedded into the first main beam 1, and the second twisted steel 11 on the bottom base plate 6 extends into the first main beam 1. The backing plate 6 and the side comb plate 4 are vertically aligned. The slideway 14 is welded with the bottom plate 6.
The middle comb plate 5 is in threaded connection with the middle screw shaft 13, the tail comb plate 30 is in threaded connection with the side screw shaft 12, the middle screw shaft 13 is in threaded connection with the side screw shaft 12, the upper ends of the middle screw shaft 13 and the side screw shaft can respectively extend into the screw through holes 20 of the middle comb plate 5 and the tail comb plate 30, and the bottom bulges of the middle screw shaft 13 and the side screw shaft 12 extend into mounting holes formed in the bottom plate of the bottom cushion plate 6. The middle screw shaft 13 and the side screw shafts 12 can freely rotate around the bottom cushion plate 6 without being disengaged. The gear 33 of the middle screw shaft 13 and the hammer 24 are engaged with each other, see fig. 7 and 14.
The slide bar 8 can slide relatively in the slideway 14, and the end part of the toothed hammer 24 drives the middle screw shaft 13 to rotate relatively. The rotation of the middle screw shaft 13 enables the middle comb plate 5 to move up and down relatively, and the telescopic function of the expansion joint device is completed.
Due to the presence of the stop 23, the slide 8 is constrained within the slideway 14, preventing it from falling out of the slideway 14. The edge screw shaft 12 does not rotate along with the movement of the slide bar 8, and can be manually rotated and adjusted during installation, so that the relative height of the tail comb plate 30 can be adjusted, the steel butt strap 3 is lapped on the tail comb plate 30, and the height is consistent with the longitudinal gradient of the bridge.
The anchoring cushion block 10 is embedded into the second main beam 2, and the half hoop 17 on the anchoring cushion block 10 is sleeved with the half hoop through hole 26 at the tail part of the slide bar 8.
The rotating shaft plate 7 is mainly used for connecting the second main beam 2 and the steel butt strap 3. The pin shaft 16 at the tail part of the steel access plate 3 is inserted into the rotating shaft plate 7. The panel of the rotating shaft plate 7 is provided with a plurality of rows and a plurality of columns of threaded rib through holes 28. A third twisted steel 32 is inserted into the twisted steel through hole 28, and the upper part of the third twisted steel is screwed and fixed on the second main beam 2 by a nut 31.
After all the parts are installed in place, the first main beam 1 and the second main beam 2 move relatively, so that the distance between the main beams is reduced or enlarged.
When the distance between the main beams is reduced, the main beam II 2 drives the sliding strip 8 and the steel butt strap 3 to move towards the main beam I1, the tooth hammer 24 drives the middle screw shaft 13 to rotate, the middle comb plate 5 can move downwards due to the relative rotation of the screw shaft 13, a space is reserved for the steel butt strap 3, the downward movement height of the middle comb plate 5 is equal to the thickness of the steel butt strap 3, and the steel butt strap 3 is just lapped on the correspondingly lowered middle comb plate 5. When the distance between the main beams is continuously reduced, the middle comb plates 5 in the advancing direction move downwards in sequence, so that a moving space is reserved for the steel access plates 3 and the moving space is used as vertical support of the steel access plates 3.
When the distance between the main beams is increased, the main beam II 2 drives the sliding strip 8 and the steel butt strap 3 to move towards the main beam II 2, the tooth hammer 24 drives the middle screw shaft 13 to rotate, the middle comb plate 5 can move upwards due to the relative rotation of the screw shaft 13, the space reserved for the steel butt strap 3 is filled, the upward movement height of the middle comb plate 5 is equal to the thickness of the steel butt strap 3, and the steel butt strap 3 is just lapped on the correspondingly descending middle comb plate 5. When the girder interval continues the grow, well fishback 5 of advancing direction can shift up in proper order, continues to fill steel attachment strap 3 and reserves the space and keep highly unanimous with steel attachment strap 3.
A rubber strip 15 between well fishback 5 is as the remedy measure between the gap, and the uncompacted rainwater that causes between well fishback 5 is prevented from oozing down to the corrosion of expansion joint device, and a 15 inseparable extrudions of rubber strip can play waterproof effect.
The expansion joint micro-seam expansion and contraction work can be realized, and the gap at the connecting part of the middle comb plate 5 and the steel lapping plate 3 is slightly larger, about 1 cm; the gaps between the middle comb tooth plates 5 are relatively small, seamless compaction is realized, and the driving comfort is good. The expansion joint device can realize large expansion amount, is suitable for bridges with extra large span, can reach the maximum expansion width of 48cm by adjusting the number of modules of the middle comb plate 5, and has obvious advantages compared with the similar existing expansion joint devices.
Claims (10)
1. A modular steel expansion joint is used for adjusting displacement and connection between a first main beam (1) and a second main beam (2), and is characterized by comprising a side comb plate (4), a middle comb plate (5), a tail comb plate (30), a steel butt strap (3), a bottom cushion plate (6), a rotating shaft plate (7) and a sliding strip (8), wherein the bottom cushion plate (6) is fixedly arranged on the first main beam (1); a plurality of middle comb plates (5) are arranged along the seam width direction, and a plurality of middle comb plates (5) are arranged side by side; the middle comb plates (5) are arranged above the bottom cushion plate (6), the lower end of each middle comb plate (5) is in threaded connection with a middle screw shaft (13), the lower end of each middle screw shaft (13) is in rotary connection with the bottom cushion plate (6), and the lower end of each middle screw shaft (13) is coaxially provided with a gear (33);
one end of the sliding strip (8) is connected with the bottom cushion plate (6) in a sliding mode, a tooth hammer (24) capable of being meshed with the gear (33) is arranged at the end of the sliding strip (8), the tooth hammer (24) adopts a section of rack, and when the sliding strip (8) slides, the tooth hammer (24) can drive the gear (33) at the lower end of the middle screw shaft (13) to rotate; when the slide bar (8) slides towards the bottom backing plate (6), the middle screw shaft (13) rotates and enables the middle comb plate (5) to move downwards; when the slide bar (8) slides towards the direction far away from the bottom backing plate (6), the middle screw shaft (13) rotates and enables the middle comb plate (5) to move upwards; the other end of the sliding strip (8) is hinged with the second main beam (2);
the side comb plate (4) is arranged on one side of the middle comb plate (5), the tail comb plate (30) and the steel strap plate (3) are located on the other side of the middle comb plate (5), the side comb plate (4) is fixedly connected with the main beam I (1), and the rotating shaft plate (7) is fixedly installed on the main beam II (2) and is connected with the steel strap plate (3) through a shaft; the tail comb plate (30) is arranged on the bottom base plate (6), and one end of the steel lapping plate (3) is lapped on the tail comb plate (30).
2. The modular steel expansion joint according to claim 1, wherein the structure of the middle comb plate (5) is divided into an upper layer and a lower layer, the upper layer is a W-shaped steel bar (21), the lower layer is a rectangular long steel bar (19), the rectangular long steel bar (19) is provided with a threaded spiral through hole (20) at intervals of a preset distance, and the upper end of the middle spiral shaft (13) is in fit connection with the spiral through hole (20); the upper layer and the lower layer are of an integral structure; between two adjacent middle comb plates (5), the W-shaped steel bars (21) on the upper layer are embedded mutually.
3. A modular steel expansion joint according to claim 2, characterized in that rubber strips (15) are arranged on both sides of the W-shaped steel strip on the upper layer of the middle comb plate (5).
4. The modular steel expansion joint as claimed in claim 2, wherein the side comb plate (4) comprises a rectangular steel plate, a comb-shaped structure (4-2) is arranged on one side of the upper part of the rectangular steel plate (4-1) close to the middle comb plate (5), and the comb-shaped structure (4-2) is W-shaped and is matched with the W-shaped steel bar (21); the rectangular steel plate (4-1) is fixedly connected with the bottom base plate (6) and the first main beam (1).
5. A modular steel expansion joint according to claim 4, characterized in that the comb-like structure (4-2) is provided with a rubber strip on the side close to the middle comb plate (5).
6. A modular steel expansion joint according to claim 2, characterized in that the steel attachment plate (3) is a steel plate with a comb-shaped edge structure; the comb tooth structure faces one side of the middle comb plate (5), and the thickness of the comb tooth structure is gradually reduced towards the direction of the middle comb plate (5); the end part of the comb tooth structure is provided with a second rubber strip (18).
7. A modular steel expansion joint according to claim 6, characterized in that the thickness of the comb structure towards the side edge of the middle comb plate (5) is half of the thickness of the non-comb structure section of the steel attachment plate (3).
8. The modular steel expansion joint of claim 1, wherein the bottom plate (6) is a U-shaped steel plate (27), and the bottom edge of the bottom plate (6) is fixed to the first main beam (1); the plurality of middle comb plates (5) are arranged on the bottom edge of the bottom base plate (6) and are positioned between the two wing edges of the bottom base plate (6); the lower end of the middle screw shaft (13) is rotationally connected with the bottom edge of the bottom cushion plate (6); the bottom edge of the bottom cushion plate (6) is provided with a slideway (14) for the slide strip (8) to slide.
9. The modular steel expansion joint of claim 8, wherein the slideway (14) comprises a sliding groove (22) and a stop block (23) for limiting the sliding strip (8), the sliding groove (22) is in adaptive connection with the sliding strip (8), and the sliding groove (22) and the stop block (23) are welded with the bottom edge of the bottom cushion plate (6); the slide bar (8) is connected with the second main beam (2) through a semi-hoop (17).
10. The process of operating a modular steel expansion joint of any of claims 1 to 9, comprising the steps of: the first main beam (1) and the second main beam (2) move relatively, so that the distance between the first main beam (1) and the second main beam (2) becomes smaller or larger;
when the distance between the first main beam (1) and the second main beam (2) is reduced, the second main beam (2) drives the sliding strip (8) and the steel access plate (3) to move towards the first main beam (1), the tooth hammer (24) drives the middle screw shaft (13) to rotate, the middle screw shaft (13) rotates to enable the middle comb plate (5) to move downwards, space is reserved for the steel access plate (3) after the middle comb plate (5) moves downwards, and the steel access plate (3) is just lapped on the corresponding descending middle comb plate (5);
when the distance between the first main beam (1) and the second main beam (2) is increased, the second main beam (2) drives the sliding strip (8) and the steel attachment strap (3) to move towards the direction far away from the first main beam (1), the tooth hammer (24) drives the middle screw shaft (13) to rotate, the middle screw shaft (13) rotates to enable the middle comb plate (5) to move upwards, the space reserved after the steel attachment strap (3) moves is filled after the middle comb plate (5) moves upwards, and the steel attachment strap (3) is just lapped on the middle comb plate (5) which does not move upwards.
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| CN201910926500.0A CN110644355B (en) | 2019-09-27 | 2019-09-27 | Module type steel expansion joint and working process thereof |
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| CN110644355B true CN110644355B (en) | 2021-01-26 |
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| CN115341469A (en) * | 2022-01-27 | 2022-11-15 | 浙江理工大学 | Adjustable temporary connection spare |
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| DE1208755B (en) * | 1963-01-15 | 1966-01-13 | Maschf Augsburg Nuernberg Ag | Covering device for expansion joints in long bridges |
| CN2337184Y (en) * | 1998-06-10 | 1999-09-08 | 张玉恒 | Piling simple support steel-plate bridge expansion joint apparatus |
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| CN110644355A (en) | 2020-01-03 |
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