CN113293698A - Highway bridge multi-joint expansion device and installation method thereof - Google Patents
Highway bridge multi-joint expansion device and installation method thereof Download PDFInfo
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- CN113293698A CN113293698A CN202110749522.1A CN202110749522A CN113293698A CN 113293698 A CN113293698 A CN 113293698A CN 202110749522 A CN202110749522 A CN 202110749522A CN 113293698 A CN113293698 A CN 113293698A
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- 238000009434 installation Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 143
- 239000010959 steel Substances 0.000 claims abstract description 143
- 238000004873 anchoring Methods 0.000 claims abstract description 102
- 239000011374 ultra-high-performance concrete Substances 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 3
- 238000011900 installation process Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 23
- 239000000463 material Substances 0.000 abstract description 2
- 239000004567 concrete Substances 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000012945 sealing adhesive Substances 0.000 description 1
- 239000002699 waste material 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
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/062—Joints having intermediate beams
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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 belongs to the technical field of expansion joints, and particularly relates to a multi-joint expansion device for a highway bridge and an installation method thereof. The structure of the bridge comprises edge beam profile steels respectively positioned at two sides of an expansion joint, at least one middle beam profile steel is arranged between the edge beam profile steels, a positioning support is arranged at the outer side of the edge beam profile steel, the positioning support is positioned in an installation groove of a bridge deck pavement layer, and a first anchoring assembly pre-embedded in a bridge body is arranged at the bottom of the installation groove; the side part of the mounting groove is provided with a second anchoring assembly which is pre-buried in the bridge body, the positioning support is respectively connected with the first anchoring assembly and the second anchoring assembly, and the first anchoring assembly and the second anchoring assembly are respectively composed of a pre-buried plate and anchoring ribs connected with the pre-buried plate. The multi-slit telescopic device has the characteristics of compact structure, firm connection, quickness in construction, durability and reliability, is simple in operation method, is convenient to install quickly, and saves manpower, material resources and construction period.
Description
Technical Field
The invention belongs to the technical field of expansion joints, and particularly relates to a multi-joint expansion device for a highway bridge and an installation method 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 device is an important component in the bridge structure, is suitable for deformation of the upper structure of the bridge span under the influence of factors such as temperature change, concrete shrinkage, live load effect, settlement of bridge abutments, creep and the like, and ensures stable passing of vehicles on the bridge deck.
The installation of the expansion device is generally carried out after the bridge pavement is paved (namely, an asphalt pavement layer is covered on a beam body), and the expansion joint at the beam end is subjected to reverse grooving installation. The installation and construction sequence of the existing bridge expansion device is as follows: pavement grooving of pavement layer → cleaning and checking of reserved ribs of a notch → positioning of a telescopic device → checking of the position of the telescopic device → welding of the expansion joint and reserved steel bars of a beam end or a bridge abutment → template installation → concrete pouring and maintenance → embedding of sealing adhesive tapes of the expansion joint.
In the above installation process, the grooving operation after pavement is particularly critical. The width and the depth of the preformed groove and the embedded steel bars are checked, so that the requirement for installing the expansion joint is met. Because the embedded ribs at the beam end or the abutment are positioned below the pavement layer, in order to ensure that the reserved ribs are not damaged, the notch is cleaned in a mode of cutting by a mechanical scribing manual pneumatic pick, the efficiency is low, the reserved ribs are easy to damage, and the cleaning quality cannot be ensured; secondly, in the grooving construction, the reserved ribs are not consistent in exposed height, and the individual positions are not damaged, so that the later-stage rib planting is needed, the mounting workload is greatly increased, the engineering period is prolonged, the mounting quality of the telescopic device cannot be guaranteed, and the construction cost and the operation risk are improved.
Disclosure of Invention
The invention aims to provide a highway bridge multi-joint expansion device convenient for quick installation and construction, which has the characteristics of compact structure, firm connection, quick construction, durability and reliability.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a public road bridge roof beam multislit telescoping device which characterized in that: the bridge surface pavement structure comprises boundary beam profile steels respectively positioned at two sides of an expansion joint, at least one middle beam profile steel is arranged between the boundary beam profile steels, a positioning support is arranged at the outer side of the boundary beam profile steels, the positioning support is positioned in an installation groove of a bridge surface pavement layer, and a first anchoring assembly pre-buried in a bridge body is arranged at the bottom of the installation groove; the side part of the mounting groove is provided with a second anchoring assembly which is pre-embedded in a bridge body, the positioning support is respectively connected with the first anchoring assembly and the second anchoring assembly, and the first anchoring assembly and the second anchoring assembly are respectively composed of a pre-embedded plate and anchoring ribs connected with the pre-embedded plate.
The additional technical characteristics of the highway bridge multi-slit expansion device further comprise that:
the embedded plate of the first anchoring assembly is a flat plate and is attached to the bottom of the mounting groove; the embedded plate of the second anchoring assembly is a vertical plate and is attached to the side wall of the mounting groove, or the embedded plate of the second anchoring assembly is an angle steel, the vertical edge of the angle steel is attached to the side wall of the mounting groove, and the transverse edge of the angle steel is positioned between the bridge deck pavement layer and the bridge body;
the first anchoring assembly and the second anchoring assembly are respectively connected with the positioning bracket through the embedded plates of the first anchoring assembly and the second anchoring assembly;
the positioning bracket comprises one or more horizontal steel plates connected with the edge beam profile steel, a plurality of through holes are formed in the horizontal steel plates, anchor bolts penetrate through the through holes and are fastened on the horizontal steel plates by compression nuts and height-adjusting nuts respectively positioned on the upper side and the lower side of the through holes, the positioning bracket is connected with the embedded plate of the first anchoring assembly through the anchor bolts, and the positioning bracket is connected with the embedded plate of the second anchoring assembly through the horizontal steel plates;
the anchoring bolt is L-shaped or T-shaped, the lower end of the anchoring bolt is welded with the embedded plate of the first anchoring assembly, the anchoring rib of the first anchoring assembly is C-shaped or J-shaped, and the upper end of the anchoring rib is welded with the embedded plate; the horizontal steel plate of the positioning bracket is connected with the embedded plate of the second anchoring assembly through a connecting rib;
pouring UHPC ultrahigh-performance concrete in the installation groove, and connecting a positioning bracket on the boundary beam profile steel with a plurality of transverse steel bars arranged in the installation groove;
the inner side of the boundary beam section steel and the two sides of the middle beam section steel are respectively provided with a clamping groove, and the clamping grooves are used for fixing the side edges of the water stop.
The invention also discloses an installation method of the highway bridge multi-slit expansion device, which is characterized by comprising the following steps: the fast-assembling multi-slit expansion device for highway bridges is installed in an expansion joint and mainly comprises the following steps,
the method comprises the following steps that A, mounting grooves are formed in two sides of an expansion joint, a pavement layer on the upper portion of a beam end is removed, and the installation grooves are vertical until the installation grooves are close to the top surface of an embedded plate of a first anchoring assembly in a bridge body and are lateral until the installation grooves are close to the side surface of an embedded part of a second anchoring assembly in the bridge body;
b, placing the edge beam section steel in the installation groove through the positioning support, wherein the edge beam section steel is symmetrically distributed on two sides of the center line of the expansion joint, and adjusting the top surface elevation of the edge beam section steel to be consistent with the pavement layer;
c, welding and fixing the lower end of the positioning support and the embedded plate of the first anchoring assembly, and welding and fixing the side end of the positioning support and the embedded plate of the second anchoring assembly;
d, arranging middle beam section steel and a support assembly thereof between the side beam section steel;
and E, pouring UHPC ultrahigh-performance concrete in the mounting groove, and burying the positioning support to fix the boundary beam profile steel.
The additional technical characteristics of the highway bridge multi-slit expansion device and the installation method thereof further comprise that:
in step B, the positioning bracket is mounted as follows: welding the side edge of the horizontal steel plate with the outer side of the section steel, sequentially inserting anchor bolts into a plurality of through holes of the horizontal steel plate, rotating a height-adjusting nut on the lower side of the steel plate and a compression nut on the upper side of the horizontal steel plate, and fastening the anchor bolts and the horizontal steel plate;
in step C, after the lower end of the anchor bolt of the positioning bracket is welded to the embedded plate of the first anchor assembly, the lower parts of the anchor bolt of the positioning bracket are connected to each other through the transverse steel bar, and after the connecting bar of the horizontal steel plate of the positioning bracket is welded to the embedded plate of the second anchor assembly, the connecting bar is connected through the transverse steel bar;
and after the step E, a step F is added, and two side edges of the plurality of water stop belts are respectively embedded in the clamping grooves of the adjacent side beam section steel and the adjacent center beam section steel or the clamping grooves of the adjacent center beam section steel.
Compared with the prior art, the multi-slit expansion device for the highway bridge and the installation method thereof provided by the invention have the following advantages: firstly, the positioning support for anchoring the multi-joint telescopic device is arranged in the mounting groove at the end part of the bridge, the excavation of the mounting groove takes the pre-embedded plate of the anchoring assembly pre-embedded in the end part of the bridge body as a boundary line, namely the pre-embedded plate of the first anchoring assembly is arranged at the bottom of the mounting groove, and the pre-embedded plate of the second anchoring assembly is arranged at the side part of the mounting groove, so that the mounting construction of profile steel and the positioning support at the later stage is facilitated, the pavement layer and part of the end part of the beam body can be removed until the surface of the pre-embedded plate of the anchoring assembly is exposed, the positioning support can be welded, and the mounting groove is simple and quick to arrange, so that the anchoring reinforcing steel bars pre-embedded in the beam end cannot be damaged; secondly, the positioning support of the side beam profile steel adopts a horizontal steel plate and an anchoring bolt penetrating through a through hole of the horizontal steel plate, the anchoring bolt performs elevation adjustment through a height-adjusting nut below the horizontal steel plate to be consistent with a bridge floor (pavement layer), and the anchoring bolt is fastened with the horizontal steel plate through a compression nut above the horizontal steel plate, so that the side beam profile steel has the advantages of compact structure, simplicity in operation and firmness in connection; thirdly, removing the pavement layers on the two sides of the expansion joint, namely, opening the installation groove to use the embedded plate of the anchoring assembly embedded in the beam end as a boundary, realizing smooth and flat slotting space, not damaging the embedded ribs in the slotting space, facilitating the excavation and cleaning of sundries in the groove, realizing the replacement of manual operation by mechanical operation, greatly improving the operation efficiency, simplifying the installation mode of the expansion device compared with the traditional construction method, improving the installation quality, prolonging the service life, and simultaneously reducing the installation cost and the maintenance cost, thereby reducing the total construction cost of the project; fourthly, the locating support lower part of boundary beam shaped steel is connected with the first anchor subassembly of mounting groove bottom, the locating support lateral part is connected with the second anchor subassembly of mounting groove lateral part, the locating support sets up crossing reinforcing bar interconnect in the mounting groove through a plurality of, after pouring concrete curing molding, form crisscross three-dimensional network structure in the mounting groove, it is more firm to the anchor of boundary beam shaped steel, the joint strength of telescoping device has been improved, this anchor structure is particularly useful for the installation of the multisection telescoping device of long-span bridge.
Drawings
FIG. 1 is a schematic structural view of a multi-joint expansion device for highway bridges (installation components of center sill section steel are not shown) according to the invention;
FIG. 2 is a perspective view of the highway bridge multi-slot retractor;
fig. 3 is a top view of the highway bridge multi-slot expansion device.
Detailed Description
The structure and the working principle of the multi-joint expansion device for the highway bridge provided by the invention are further described in detail with reference to the accompanying drawings.
Referring to fig. 1 and fig. 2, the invention provides a structural schematic diagram of a fast-assembling multi-slit expansion device for a highway bridge. The structure of the highway bridge multi-joint expansion device comprises edge beam section steels 1 respectively positioned at two sides of an expansion joint, at least one middle beam section steel 2 is arranged between the edge beam section steels 1, a positioning support 3 is arranged at the outer side of the edge beam section steel 1, the positioning support 3 is positioned in a mounting groove b of a bridge deck pavement layer a, and the bottom of the mounting groove b is provided with a first anchoring assembly 4 pre-embedded in a bridge body c; the side part of the mounting groove b is provided with a second anchoring component 5 which is pre-embedded in the bridge girder body c, the positioning support 3 is respectively connected with the first anchoring component 4 and the second anchoring component 5, and the first anchoring component 4 and the second anchoring component 5 are respectively composed of a pre-embedded plate and an anchoring rib connected with the pre-embedded plate.
The working principle is as follows: the side beam section steel 1 of the multi-slit expansion device and the positioning support 3 connected with the side beam section steel are positioned in the mounting grooves b at two sides of the expansion joint, the mounting groove b is formed by removing a bridge deck pavement layer a and a part of bridge girder body c at the beam end or the upper part of a bridge abutment, the groove bottom is based on exposing the embedded plate 41 of the first anchoring component 4, the groove side is based on exposing the embedded plate 51 of the second anchoring component 5, the positioning support 3 of the side beam section steel 1 is connected with the embedded plate 41 of the first anchoring component 4 to realize vertical mounting and positioning, the positioning support 3 is connected with the embedded plate 51 of the second anchoring component 5 to realize horizontal mounting and positioning, in the process of slotting construction, the pavement layer a and part of the beam body c are removed until the embedded plates (41, 51) are exposed, the anchoring ribs (42 and 52) in the beam body cannot be damaged, the purposes of rapid grooving, stable connection and smooth installation are achieved, manpower and material resources are saved, and the construction period is shortened.
In the structure of the multi-slot expansion device for the highway bridge,
the embedded plate 41 of the first anchoring assembly 4 is a flat plate, and is attached to the bottom of the mounting groove b, in the excavation process of the mounting groove b, the pavement layer a at the beam end is completely peeled off, and part of the bridge beam body c is removed downwards until the embedded plate is exposed; the embedded plate 51 of the second anchoring component 5 is a vertical plate and is attached to the side wall of the mounting groove b, namely, the side part of the mounting groove b is bounded by the embedded plate 52 of the second anchoring component 5 in the beam body, the excavation construction efficiency of the mounting groove b can be obviously improved through the embedded plates (41, 51), the notch is smooth and convenient for cleaning the site, and the embedded anchoring ribs (42, 52) in the beam body cannot be damaged, and the first anchoring component 4 and the second anchoring component 5 are respectively connected with the positioning support 3 through the embedded plates (41, 51);
optionally, the embedded plate 51 of the second anchoring assembly 5 is an angle steel, the vertical edge of the embedded plate is attached to the side wall of the mounting groove b, the transverse edge of the embedded plate is located between the bridge deck pavement layer a and the bridge beam body c, the embedded plate in the form of the angle steel increases the direction dimension of anchoring, and anchoring is firmer;
the positioning bracket 3 comprises one or more horizontal steel plates 31 connected with the side beam section steel 1, the horizontal steel plates 31 and the side beam section steel 1 are laid on two sides of the expansion joint in parallel, when the number of the horizontal steel plates 31 is one, the whole horizontal steel plates are arranged in the installation groove b in a strip shape, when the number of the horizontal steel plates 31 is multiple sections, the horizontal steel plates 31 are uniformly distributed along the section steel to form multiple groups of modules, a plurality of through holes are arranged on the horizontal steel plates 31, anchor bolts 32 penetrate through the through holes, the anchor bolts 32 are fastened on the horizontal steel plates 31 by compression nuts 33 and heightening nuts 34 respectively positioned on the upper and lower sides of the through holes, the positioning bracket 3 is connected with the pre-embedded plate 41 of the first anchor assembly 4 through the anchor bolts 32, the positioning bracket 3 is connected with the pre-embedded plate 51 of the second anchor assembly 5 through the horizontal steel plates 31, wherein the heightening nuts 34 are positioned on the lower parts of the through holes, the elevation of the horizontal steel plates 31 can be adjusted, so that the side beam section steel 1 is consistent with the bridge floor (pavement layer), the compression nut 33 is positioned at the upper part of the through hole and rotates relative to the height-adjusting nut 34 to fasten the anchor bolt 32 on the horizontal steel plate 31; connecting the horizontal steel plate 31 (side edge) with the embedded plate 51 of the second anchoring component 5, wherein the horizontal steel plate 31 (side edge) can be directly connected by welding, or a connecting steel bar 35 can be arranged between the horizontal steel plate 31 and the embedded plate 51, and after the positioning bracket 3 completes the connection and the positioning, post-pouring concrete in the mounting groove b to realize integral construction and solidification;
optionally, the anchor bolt 32 is L-shaped or T-shaped, the lower end of the anchor bolt is welded to the embedded plate 41 of the first anchor assembly 4, the anchor rib of the first anchor assembly 4 is C-shaped or J-shaped, the upper end of the anchor rib is welded to the embedded plate 41, the horizontal steel plate 31 of the positioning bracket 3 is connected to the embedded plate 51 of the second anchor assembly 5 through the connecting rib 35, the anchor bolt 32 and the anchor rib 42 are respectively welded to the upper and lower surfaces of the embedded plate 41 of the first anchor assembly 4, so as to enhance the vertical stability of the positioning bracket 3, meanwhile, the connecting rib 35 is arranged between the horizontal steel plate 31 of the positioning bracket 3 and the embedded plate 51 of the second anchor assembly 5, so as to enhance the anchoring strength of the positioning bracket 3 in the horizontal direction, so that the first anchor assembly 4 and the second anchor assembly 5 form an anchoring whole with the positioning bracket 3, the connecting tightness is higher, and furthermore, the embedded plate is respectively welded to the bent portions of the anchor bolt 32 and the anchor rib, the structure is flexible, the connection is firm, and the construction is rapid;
preferably, UHPC ultrahigh-performance concrete 6 is poured in the mounting groove b, the positioning support 3 on the boundary beam profile steel 1 is connected with the plurality of transverse reinforcing steel bars 36 arranged in the mounting groove b, compared with the traditional concrete, the UHPC ultrahigh-performance concrete 6 has the characteristics of high anchoring force, good durability, high compressive strength, short solidification time and the like, the size of the positioning structural member of the expansion device can be reduced by utilizing the property of high strength of the UHPC, for example, the number and the size of the positioning support 3 and the anchoring components are reduced, the engineering cost is reduced, more use spaces can be obtained, the expansion device is particularly suitable for building bridges with longer span and larger clearance, meanwhile, the space of the mounting groove b can be reduced, and the construction waste generated by the installation and construction of the expansion device is obviously reduced;
the inboard both sides with well roof beam shaped steel 2 of above-mentioned boundary beam shaped steel 1 set up the draw-in groove respectively, and the draw-in groove is used for the side of fixed waterstop, and the waterstop can sealing connection promptly in a plurality of expansion joints, prevents inside running water from permeating extending device's life.
As shown in fig. 3, the invention also provides a method for installing the multi-joint expansion device of the highway bridge, which is used for installing the quick-assembly expansion device of the highway bridge in an expansion joint and mainly comprises the following steps,
the mounting grooves b are formed in two sides of the expansion joint, the pavement layer a on the upper portion of the beam end is removed, and the installation grooves are vertical to the top surface of the embedded plate 41 of the first anchoring assembly 4 in the bridge body c and are lateral to the side surface of the embedded part 51 of the second anchoring assembly 5 in the bridge body c;
b, placing the edge beam section steel 1 in the mounting groove B through the positioning support 3, symmetrically distributing the edge beam section steel 1 on two sides of the center line of the expansion joint, and adjusting the top surface elevation of the edge beam section steel 1 to be consistent with the pavement layer a;
c, welding and fixing the lower end of the positioning bracket 3 and the embedded plate 41 of the first anchoring assembly 4, and welding and fixing the side end of the positioning bracket 3 and the embedded plate 51 of the second anchoring assembly 5;
d, arranging middle beam section steel 2 and an installation assembly thereof between the edge beam section steels 1, wherein the installation assembly comprises a displacement control box 81 positioned in installation grooves b on two sides of the expansion joint and support beams 82 with two end parts respectively positioned in the displacement control box 81;
e, pouring UHPC ultrahigh-performance concrete 6 in the mounting groove b, and fixing the boundary beam profile steel 1 by the buried positioning support 3.
Compared with the traditional slotting construction, the construction method takes the top surface of the embedded plate of the first anchoring component 4 and the side surface of the embedded plate of the second anchoring component 5 in the beam body as boundaries, the pavement layer a and part of the beam body c can be quickly removed during the excavation construction of the mounting groove b, the embedded steel bar components in the beam body c are not damaged, and compared with methods such as mechanical marking and manual pneumatic pick cutting, the construction method has the advantages that the construction efficiency is obviously improved, the site is cleaner, the installation is smoother, and the anchoring quality of the boundary beam profile steel 1 is firmer.
In one embodiment, step B, the installation process of the positioning bracket 3 is as follows: welding the side edge of the horizontal steel plate 31 with the outer side of the boundary beam section steel 1, sequentially inserting anchor bolts 32 into a plurality of through holes of the horizontal steel plate 31, rotating an heightening nut 34 on the lower side of the horizontal steel plate 31 and a pressing nut 33 on the upper side of the horizontal steel plate 31, fastening the anchor bolts 32 and the horizontal steel plate 31, and screwing and positioning the nuts, so that the assembling operation is facilitated, the welding workload is remarkably reduced, and the construction cost is saved;
in the step C, after the lower ends of the anchor bolts 32 of the positioning bracket 3 are welded with the embedded plate 41 of the first anchor assembly 4, the lower parts of the anchor bolts are connected with each other through the transverse steel bars 36, the plurality of anchor bolts 32 penetrating through the horizontal steel plate 31 are connected into a whole through the transverse steel bars 36 below the horizontal steel plate 31, after the connecting ribs 35 of the horizontal steel plate 31 of the positioning bracket 3 are welded with the embedded plate 52 of the second anchor assembly 5, the connecting ribs 35 are also connected through the transverse steel bars 36, so that the three-dimensional support strength of the positioning bracket 3 is improved, and after the post-cast concrete is formed, the anchoring and positioning structure is firmer;
after the step E, a step F is added, two side edges of the water stops 7 are respectively embedded in the clamping grooves of the adjacent side beam section steel 1 and the middle beam section steel 2 or the clamping grooves of the adjacent middle beam section steel 2, namely the water stops 7 are laid between the adjacent section steel along the trend of the expansion joint, the sealing and waterproof effects of the multi-joint expansion device are achieved, and the service life of the expansion structure is prolonged.
Claims (10)
1. The utility model provides a public road bridge roof beam multislit telescoping device which characterized in that: the bridge surface pavement structure comprises boundary beam profile steels respectively positioned at two sides of an expansion joint, at least one middle beam profile steel is arranged between the boundary beam profile steels, a positioning support is arranged at the outer side of the boundary beam profile steels, the positioning support is positioned in an installation groove of a bridge surface pavement layer, and a first anchoring assembly pre-buried in a bridge body is arranged at the bottom of the installation groove; the side part of the mounting groove is provided with a second anchoring assembly which is pre-embedded in a bridge body, the positioning support is respectively connected with the first anchoring assembly and the second anchoring assembly, and the first anchoring assembly and the second anchoring assembly are respectively composed of a pre-embedded plate and anchoring ribs connected with the pre-embedded plate.
2. The highway bridge multi-slot expansion device of claim 1, wherein: the embedded plate of the first anchoring assembly is a flat plate and is attached to the bottom of the mounting groove; the embedded plate of the second anchoring component is a vertical plate which is attached to the side wall of the mounting groove, or the embedded plate of the second anchoring component is an angle steel, the vertical edge of the angle steel is attached to the side wall of the mounting groove, and the transverse edge of the angle steel is located between the bridge deck pavement layer and the bridge body.
3. The highway bridge multi-slot expansion device of claim 1, wherein: the positioning support comprises one or more horizontal steel plates connected with the side beam profile steel, a plurality of through holes are formed in the horizontal steel plates, anchor bolts penetrate through the through holes, the anchor bolts are fastened on the horizontal steel plates through compression nuts and heightening nuts respectively positioned on the upper side and the lower side of the through holes, the positioning support is connected with the embedded plate of the first anchoring assembly through the anchor bolts, and the positioning support is connected with the embedded plate of the second anchoring assembly through the horizontal steel plates.
4. A road bridge expansion device according to claim 3, wherein: the anchoring bolt is L-shaped or T-shaped, the lower end of the anchoring bolt is welded with the embedded plate of the first anchoring assembly, the anchoring rib of the first anchoring assembly is C-shaped or J-shaped, and the upper end of the anchoring rib is welded with the embedded plate of the first anchoring assembly; and the horizontal steel plate of the positioning bracket is connected with the embedded plate of the second anchoring assembly through a connecting rib.
5. The highway bridge multi-slot expansion device of claim 1, wherein: UHPC ultrahigh-performance concrete is poured in the mounting groove, and the positioning support on the boundary beam profile steel is connected with a plurality of transverse reinforcing steel bars arranged in the mounting groove.
6. The highway bridge multi-slot expansion device of claim 1, wherein: the inboard and the both sides of centre sill shaped steel of boundary beam shaped steel set up the draw-in groove respectively, the draw-in groove is used for fixing the side of waterstop.
7. A method for installing a multi-slit expansion device of a highway bridge is characterized by comprising the following steps: the fast-assembling multi-slot expansion device for road bridge of claims 1 to 6 installed in expansion joints comprises the following steps,
the method comprises the following steps that A, mounting grooves are formed in two sides of an expansion joint, a pavement layer on the upper portion of a beam end is removed, and the installation grooves are vertical until the installation grooves are close to the top surface of an embedded plate of a first anchoring assembly in a bridge body and are lateral until the installation grooves are close to the side surface of an embedded part of a second anchoring assembly in the bridge body;
b, placing the edge beam section steel in the installation groove through the positioning support, wherein the edge beam section steel is symmetrically distributed on two sides of the center line of the expansion joint, and adjusting the top surface elevation of the edge beam section steel to be consistent with the pavement layer;
c, welding and fixing the lower end of the positioning support and the embedded plate of the first anchoring assembly, and welding and fixing the side end of the positioning support and the embedded plate of the second anchoring assembly;
d, arranging middle beam section steel and a support assembly thereof between the side beam section steel;
and E, pouring UHPC ultrahigh-performance concrete in the mounting groove, and burying the positioning support to fix the boundary beam profile steel.
8. The method for installing the multi-slot expansion device of the highway bridge according to claim 7, wherein the method comprises the following steps: in step B, the installation process of the positioning bracket is as follows: the side of the horizontal steel plate is welded with the outer side of the section steel, the anchor bolts are sequentially inserted into the through holes of the horizontal steel plate, the heightening nuts on the lower side of the steel plate and the compression nuts on the upper side of the horizontal steel plate are rotated, and the anchor bolts are fastened with the horizontal steel plate.
9. The method for installing the multi-slot expansion device of the highway bridge according to claim 8, wherein the method comprises the following steps: in the step C, after the lower end of the anchor bolt of the positioning support is welded with the embedded plate of the first anchor assembly, the lower parts of the anchor bolt of the positioning support are connected with each other through the transverse steel bar, and after the connecting bar of the horizontal steel plate of the positioning support is welded with the embedded plate of the second anchor assembly, the connecting bar is connected through the transverse steel bar.
10. The method for installing the multi-slot expansion device of the highway bridge according to claim 7, wherein the method comprises the following steps: and E, adding a step F, and respectively embedding two side edges of the plurality of water stop belts into the clamping grooves of the adjacent side beam section steel and the adjacent center beam section steel or the clamping grooves of the adjacent center beam section steel.
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| CN202110749522.1A CN113293698A (en) | 2021-07-02 | 2021-07-02 | Highway bridge multi-joint expansion device and installation method thereof |
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| CN202110749522.1A CN113293698A (en) | 2021-07-02 | 2021-07-02 | Highway bridge multi-joint expansion device and installation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114032762A (en) * | 2021-12-20 | 2022-02-11 | 浙江数智交院科技股份有限公司 | Bridge expansion joint structure and construction method |
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2021
- 2021-07-02 CN CN202110749522.1A patent/CN113293698A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114032762A (en) * | 2021-12-20 | 2022-02-11 | 浙江数智交院科技股份有限公司 | Bridge expansion joint structure and construction method |
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