CN110438887B - Concrete beam composite material sidewalk with cable trough below longitudinally-arranged walking plate - Google Patents
Concrete beam composite material sidewalk with cable trough below longitudinally-arranged walking plate Download PDFInfo
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- CN110438887B CN110438887B CN201910770524.1A CN201910770524A CN110438887B CN 110438887 B CN110438887 B CN 110438887B CN 201910770524 A CN201910770524 A CN 201910770524A CN 110438887 B CN110438887 B CN 110438887B
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- 239000003822 epoxy resin Substances 0.000 claims description 3
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- 230000009471 action Effects 0.000 description 10
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/30—Installations of cables or lines on walls, floors or ceilings
- H02G3/34—Installations of cables or lines on walls, floors or ceilings using separate protective tubing
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention belongs to the field of railway bridges, and relates to a concrete beam composite sidewalk which is arranged on the outer side of a railway concrete beam ballast wall and is provided with a cable trough below a longitudinally-arranged walking plate. The concrete beam composite sidewalk comprises: a plurality of supports are fixed on the outer side of the ballast blocking wall, the plurality of supports are sequentially arranged along the longitudinal direction of the ballast blocking wall, one end of each support is fixed on T-shaped steel pre-buried in the ballast blocking wall, and the other end of each support is fixedly connected with a railing stand column; and a beam is horizontally fixed above the bracket along the transverse direction of the ballast blocking wall, a cable groove is arranged between the top of the bracket and the beam, and the walking plate is longitudinally supported on the beam. The connecting pieces are respectively arranged on the upper flange of the bracket and the inner side of the railing upright post to support the cross beam, the walking plate is longitudinally laid on the cross beam, and then the walking plate is fixed on the cross beam by the large round head bolt or the pressing plate, so that the inspection and the maintenance of electric power and signal cables are greatly facilitated.
Description
Technical Field
The invention belongs to the field of railway bridges, and relates to a concrete beam composite sidewalk which is arranged on the outer side of a railway concrete beam ballast wall and is provided with a cable trough below a longitudinally-arranged walking plate.
Background
The sidewalks of the railway reinforced concrete or prestressed concrete T-shaped beam and the plate beam are arranged on two sides of the bridge, and are composed of a support, a railing upright post, a handrail, a walking plate and the like, and the sidewalks are mainly used as passages for maintenance operation of workers and can also be used as a support structure of electric power and signal cables, and the sidewalks are one of the most important accessory facilities of the railway bridge.
The dead load borne by the sidewalk is the dead weight of the sidewalk, and if the cable groove is installed on the sidewalk bracket, the dead load also comprises the dead weight of the cable groove and the power and signal cables in the cable groove; the live load mainly comprises crowd live load, wind live load, dead weight of temporary ballast piling and simple construction equipment, and inertia live load generated by up-and-down vibration along with a beam body when a train passes through. The loads are transmitted to the sidewalk support through the sidewalk plate or directly act on the sidewalk support and then are transmitted to the beam body through the sidewalk support.
The sidewalk support of the existing railway reinforced concrete or prestressed concrete T-shaped beam and plate beam is mainly of a steel structure or a reinforced concrete structure and is connected with embedded parts in the beam through bolts. The railing post is of a steel structure or a reinforced concrete structure and is connected to the sidewalk support through bolting or welding. The handrail is of a steel structure or a reinforced concrete structure and directly penetrates through the plurality of handrail stand columns. When the walking board is a prefabricated reinforced concrete board, the walking board is directly and longitudinally placed on the two adjacent sidewalk brackets or is transversely placed on angle steel supported on the two adjacent sidewalk brackets; when the walking board is made of rubber-plastic boards or composite boards, the walking board is fixed on the two adjacent sidewalk supports by bolts or fixed on angle steel supported on the two adjacent sidewalk supports by bolts.
The existing concrete beam sidewalk has the following defects: (1) the mass is large, the second-stage constant load of the bridge is increased, and the bearing capacity of the bridge is reduced; (2) the steel structure is easy to corrode and needs to be coated regularly; (3) the protective layer of the reinforced concrete structure is easy to peel off, expose the rib, even break, need regular maintenance and replacement; (4) the walking board is directly placed on the brackets or the angle steel between the brackets, is easily turned over by strong wind, and is inconvenient to maintain and repair if fixed by bolts.
When the cable trough of built-in electric power and signal cable is installed on the bridge, its position has following several:
(1) and the sidewalk support overhanging section is positioned on the outer side of the railing post. When the installation mode is adopted, the dead weight of the cable groove and the cable in the cable groove generates larger additional bending moment at the joint of the bracket and the embedded part in the concrete beam, so that the strength and the rigidity of the bracket need to be increased, and the cable is inconvenient to inspect and maintain.
(2) Is positioned outside the railing upright post and is connected on the horizontal supporting rod of the upright post. When the installation mode is adopted, dead weights of cables in the cable grooves and cables in the cable grooves generate large additional bending moments at the joint of the rail upright post and the support and the joint of embedded parts in the support and the concrete beam, so that the strength and the rigidity of the support and the rail upright post need to be increased, and the cables are inconvenient to inspect and maintain.
(3) Is positioned at the inner side of the railing upright post and is connected on the horizontal supporting rod of the upright post. Although the installation mode is convenient for checking the cable, the cable trough occupies the space of the sidewalk, and in order to ensure the width of the sidewalk, the bracket needs to be transversely extended, so that the self weight of the bracket is increased; the dead weight of the cable trough and the cables in the cable trough generates larger additional bending moment at the joint of the railing upright post and the support and the joint of the support and the embedded part in the concrete beam, so that the strength and the rigidity of the support and the railing upright post need to be increased.
(4) Is positioned on the lower layer of the double-layer sidewalk bracket. The sidewalk support is made into two layers, wherein the upper layer supports the walking plate, and the lower layer supports the cable groove. When the installation mode is adopted, the bracket is complex and is not beneficial to the inspection and maintenance of the cable.
(5) The cable trough is arranged on the sidewalk support, the width of the cable trough is the same as that of the sidewalk, and the walking plate is transversely laid on the cable trough. When the installation mode is adopted, although the inspection and maintenance of cables are convenient, the cable trough not only bears the weight of electric power and signal cables, but also can be used as a main stress member to bear the loads such as the dead weight of a walking board, the live load of people and wind, temporary ballast stacking, the dead weight of a simple construction machine and the like, the high requirement is provided for the bearing capacity of the cable trough, the sufficient strength and rigidity are required, the thickness of the pavement needs to be increased when the pavement is made of thin steel plates or SMC composite materials, or a reinforced concrete structure is adopted, the quality of the pavement can be greatly increased, and the connection between a pavement support and an embedded part in a concrete beam is easy to fatigue damage under the action of the inertia live load generated along with the vertical vibration of the beam body when a train passes through.
On the one hand, pavement support adopts the easy degradation of steel construction or reinforced concrete structure, and maintenance work volume is big, and on the other hand needs to make things convenient for inspection and maintenance of electric power and signal cable, and current concrete beam pavement support and cable duct's mounting means can not satisfy this requirement.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a concrete beam composite sidewalk, and in particular, to a composite sidewalk which is connected to the outer side of a railway concrete beam ballast wall through high-strength bolts, wherein the embedded T-shaped steel is embedded in the sidewalk, and the cable groove is located below a longitudinally arranged walking plate. The concrete beam composite material sidewalk has the advantages of light dead weight, good durability, convenience in inspection and maintenance of cables in the cable groove and the like when the cable groove is positioned below the longitudinally-arranged walking plate.
The purpose of the invention is realized by the following technical scheme:
a concrete beam composite sidewalk with a cable trough below a longitudinally-arranged walking plate, comprising:
a plurality of supports are fixed on the outer side of the ballast blocking wall, the plurality of supports are sequentially arranged along the longitudinal direction of the ballast blocking wall, one end of each support is fixed on T-shaped steel pre-buried in the ballast blocking wall, and the other end of each support is fixedly connected with a railing stand column;
and a beam is horizontally fixed above the bracket along the transverse direction of the ballast blocking wall, a cable groove is arranged between the top of the bracket and the beam, and the walking plate is longitudinally supported on the beam.
Further, the support is I-shaped along the bridge to the facade, and the cross bridge is to being solid triangle-shaped, the support includes top flange, bottom flange and is located the support web between top flange, the bottom flange, be equipped with vertical stiffening rib on the support web, vertical stiffening rib connects top flange and bottom flange to prevent the local bucking of support web.
Furthermore, the side of the support web close to the ballast retaining wall is a locally thickened web to resist bending moment born by the support and pressure generated by screwing up the high-strength bolt. The locally thickened web plate is provided with a circular bolt hole, and the support is fixed on the T-shaped steel through a high-strength bolt.
Further, the support web is close to railing stand side and is equipped with the local reinforcing round hole that supplies the installation to prevent the pole that heels, and the purpose that sets up the pole that heels of preventing prevents the support and inclines unstability under live load effect.
Further, a vertical connecting piece is arranged at one end, close to the ballast blocking wall, of the top of the support and used for restraining the cross beam, and a first notch is formed in the top of the vertical connecting piece; a boss is arranged at the joint of the top of the bracket and the railing column, a first transverse connecting piece is arranged above the boss and horizontally fixed on the railing column, and bolt holes are respectively arranged above the boss and the first transverse connecting piece at corresponding positions; one end of the cross beam is inserted into the first notch, and the other end of the cross beam is inserted between the boss and the first transverse connecting piece and is fixed through a limiting bolt, so that the upper position and the lower position of the cross beam are limited, and the walking board is prevented from being overturned under the action of upward wind load.
Further, support top intermediate position is equipped with vertical mid-span support, vertical mid-span support top surface elevation is the same with the bottom surface of crossbeam, is used for the auxiliary stay the crossbeam, in order to reduce the span of crossbeam, thereby reduce the deformation of crossbeam under the live load effect.
Further, railing post horizontal cross section is the I-shaped, includes the inboard edge of a wing, the outside edge of a wing and is located the railing web between the inboard edge of a wing, the outside edge of a wing be equipped with a plurality of round holes from last to down on the railing web, supply to install the railing handrail.
Furthermore, the walking plate is fixed on the cross beam through a plurality of large round head bolts, and the large round head bolts are adopted to increase the contact area of the bolts and the walking plate and increase the capability of resisting live load of upwind. Wherein the walking plate and the cross beam are respectively arranged at a plurality of bolt holes at corresponding positions.
Further, or fix the walking board on the crossbeam through the clamp plate, it is specific:
a second notch is formed above the first notch on the vertical connecting piece, a second transverse connecting piece is further arranged above the first transverse connecting piece, the second transverse connecting piece is also horizontally fixed on the railing upright post, one end of the pressing plate is inserted into the second notch, the other end of the pressing plate is inserted between the first transverse connecting piece and the second connecting piece and is fixed through a limiting bolt, and therefore the upper and lower positions of the pressing plate and the cross beam are limited, and the walking plate is prevented from being overturned under the action of upward wind load;
the middle position of the upper surface of the cross beam is provided with a baffle along the length direction of the cross beam, and the baffle is vertically arranged and used for preventing the longitudinal dislocation of the walking plate.
Further, support, railing stand, vertical connecting piece, intermediate strut, boss, first transverse connecting piece and second transverse connecting piece integrated into one piece.
Furthermore, the bracket, the railing upright post, the cross beam and the pressing plate are all made of fiber reinforced composite materials, and each component is also provided with a plurality of layers of multidirectional reinforced fiber felts; the fiber reinforced composite material is a multiphase material formed by winding, die pressing, vacuum infusion, pultrusion or resin transfer molding processes of a reinforcing material and a base material, wherein the base material is any one of unsaturated polyester resin, vinyl resin, epoxy resin, polyurethane resin or phenolic resin, and the reinforcing fiber is any one of glass fiber, basalt fiber or carbon fiber.
Furthermore, the bracket, the railing upright post, the vertical connecting piece, the middle support, the boss, the first transverse connecting piece and the second transverse connecting piece are made of fiber reinforced composite materials through one-step forming by die pressing, vacuum infusion or resin transfer molding; the cross beam and the pressing plate are both made of fiber reinforced composite materials through a continuous pultrusion process.
The invention has the beneficial effects that:
according to the concrete beam composite material sidewalk with the cable trough positioned below the longitudinally arranged walking plate, the structure of the support is reasonably designed, the connecting pieces are respectively arranged on the upper flange of the support and the inner side of the railing upright post to support the cross beam, the walking plate is longitudinally laid on the cross beam, and then the walking plate is fixed on the cross beam through the large round head bolt or the pressing plate, so that the inspection and the maintenance of electric power and signal cables are greatly facilitated.
Drawings
FIG. 1 is a schematic view of a walking plate of a concrete beam composite sidewalk according to the present invention fixed to a cross beam by a large round head bolt;
FIG. 2 is a schematic view of a footplate of a concrete beam composite sidewalk according to the present invention secured to a cross member by a clamp plate;
FIG. 3 is a schematic perspective view of the bracket and the railing post when the walk plate of the concrete beam composite sidewalk of the present invention is fixed by a large round head bolt;
fig. 4 is a schematic perspective view of the bracket and the railing post when the footplate of the concrete beam composite sidewalk of the present invention adopts a pressing plate fixing manner;
FIG. 5 is a schematic perspective view of the cross beam when the footplate of the concrete beam composite sidewalk of the present invention is fixed by a pressing plate;
6 a-6 h are schematic diagrams of the installation process of the railway concrete beam composite sidewalk in sequence;
fig. 7 is a schematic view of a concrete beam composite sidewalk according to embodiment 3 of the present invention;
fig. 8 is a schematic view of a concrete beam composite sidewalk according to embodiment 4 of the present invention;
fig. 9 is a schematic view of a concrete beam composite sidewalk according to embodiment 5 of the present invention;
fig. 10 is a schematic view of a concrete beam composite sidewalk according to embodiment 6 of the present invention.
Wherein, 1-bracket, 11-upper flange, 12-lower flange, 13-bracket web, 131-local thickening web, 132-circular bolt hole, 14-vertical stiffening rib, 15-vertical connecting piece, 151-first notch, 152-second notch, 16-middle support, 17-local reinforcing circular hole; 2-railing column, 21-railing web, 211-round hole, 22-inner side flange, 221-boss, 222-first transverse connecting piece, 223-second transverse connecting piece and 23-outer side flange; 3-handrail; 4-anti-roll bar; 5-a cross beam, 51-a limiting bolt and 52-a baffle; 6-a step plate; 7-big round head bolt; 8-pressing a plate; 9-cable trough, 91-cable; 10-a ballast retaining wall, 101-T-shaped steel and 102-a high-strength bolt.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A concrete beam composite material sidewalk with a cable trough below a longitudinally-arranged walking plate is shown in figure 1 and comprises a support 1, a railing upright post 2, a railing handrail 3, an anti-roll rod 4, a cross beam 5, a walking plate 6 and a large round-head bolt 7.
A plurality of supports 1 are fixed on the outer side of the ballast retaining wall 10, the plurality of supports 1 are sequentially arranged along the longitudinal direction of the ballast retaining wall 10, one end of each support 1 is fixed on a T-shaped steel 101 embedded in the ballast retaining wall 10 through a high-strength bolt 102, and the other end of each support 1 is fixedly connected with a railing column 2.
As shown in fig. 3, the support 1 is I-shaped along the vertical plane of the bridge direction, and the transverse bridge direction is approximately a solid triangle. Support 1 includes top flange 11, bottom flange 12 and is located the support web 13 between top flange 11, the bottom flange 12, be equipped with vertical stiffening rib 14 on the support web 13, vertical stiffening rib 14 connects top flange 11 and bottom flange 12 to prevent support web 13 local buckling.
The side of the bracket web 13 close to the ballast retaining wall 10 is a locally thickened web 131 to resist bending moment born by the bracket and pressure generated by screwing up high-strength bolts. Circular bolt holes 132 are formed in the locally thickened web 131, and the bracket 1 is fixed on the T-shaped steel 101 through high-strength bolts 102.
The bracket web 13 is provided with a local reinforcing round hole 17 for installing the anti-roll rod 4 between the upper flange 11 and the lower flange 12, and the anti-roll rod is arranged to prevent the bracket from being unstably inclined under live load.
And a cross beam 5 is horizontally fixed above the bracket 1 along the transverse direction of the ballast retaining wall 10. The horizontal positive intermediate position of top flange 11 is equipped with vertical intermediate strut 16, and its top surface elevation is the same with the bottom surface of crossbeam 5, and the effect is the auxiliary stay crossbeam 5 to reduce the span of crossbeam 5, thereby reduce crossbeam 5 is the deformation under the live load effect.
The horizontal cross section of the railing post 2 is I-shaped, comprises an inner side flange 22, an outer side flange 23 and a railing web 21 positioned between the inner side flange 22 and the outer side flange 23, and a plurality of round holes 211 are arranged on the railing web 21 from top to bottom to install the railing handrail 3.
As shown in fig. 1, the walking board 6 is supported on the beam 5 longitudinally, and the clear distance between the bracket upper flange 11 and the beam 5 is greater than or equal to the height of the cable trough 9, so as to provide space for installing the cable trough. The cable trough 9 containing the power and signal cables 91 does not belong to an integral part of the walkway, but is mounted above the frame 1 of the walkway below the cross beam 5 so that the cable trough 9 only bears the weight of the cables 91.
In the present embodiment, a plurality of large round head bolts 7 are used to fix the walking plate 6 to the cross member 5, as shown in fig. 1.
One end, close to the ballast retaining wall 10, of the bracket upper flange 11 is provided with a vertical connecting piece 15 for restraining the beam 5, the vertical connecting piece 15 is provided with a first notch 151, and the shape and the geometric dimension of the first notch are the same as the cross section dimension of one end of the beam 5.
The joint of the railing column 2 and the upper flange 11 of the bracket is provided with a boss 221, and the upper part of the boss is provided with a bolt hole. The height of the boss 221 is equal to the clear distance between the bracket upper flange 11 and the cross beam 5. The purpose of the bosses 221 is to support the cross beam 5. A first transverse connecting piece 222 is arranged on the inner flange 22 above the boss 221, and a bolt hole is formed in the first transverse connecting piece 222 and corresponds to the bolt hole in the boss 221. The clear distance between the first cross connector 222 and the boss 221 is equal to the height of the beam 5.
Bolt holes are formed in the positions, corresponding to the bosses 221, of the outer ends of the cross beams 5, when the cross beams are installed on site, the inner ends of the cross beams 5 are inserted into the first notches 151, and the outer ends of the cross beams are fixed with the bosses 221 and the first transverse connecting pieces 222 through limiting bolts 51, so that the upper and lower positions of the cross beams 5 are limited, and the walking plates 6 are prevented from being turned over under the action of upward wind loads.
Bolt holes are formed in the cross beam 5 at intervals, bolt holes are also formed in the corresponding positions of the walking plates 6, and the walking plates are fixed on the cross beam 5 through the large round head bolts 7 during field installation. The purpose of the large round head bolt 7 is to increase the contact area of the bolt and the walking plate and increase the capability of resisting live load of upwind.
The length of each walking plate 6 is equal to one or more times of the distance between the adjacent brackets 1, namely, the walking plates 6 are continuously arranged. Compared with a simply-supported walking plate with the same cross section, the continuous walking plate has higher vertical rigidity, namely the downward deflection of the continuous walking plate under the action of concentrated live load is smaller.
The support 1, the railing post 2, the vertical connecting piece 15, the middle support 16, the boss 221 and the first transverse connecting piece 222 are integrally formed. The T-shaped steel 101 is an embedded part fixed on the ballast retaining wall 10.
The forming process of the composite material is various, and considering that the bracket 1, the railing post 2, the vertical connecting piece 15, the middle support 16, the boss 221 and the first transverse connecting piece 222 are of the special-shaped structure as a whole, the characteristics of different forming processes are comprehensively considered, and the one-step forming process is selected from the processes of mould pressing, vacuum infusion or resin transfer molding. The cross beam 5 and the pressing plate 8 are both sections with the cross section geometric dimension unchanged along the length direction, and are made of fiber reinforced composite materials through a continuous pultrusion process.
The concrete beam composite material sidewalk cantilever is installed on the outer side of the ballast retaining wall, under the action of dead weight, crowd live load, temporary ballast stacking and inertia live load generated along with the up-and-down vibration of a bridge, the connecting part of the bracket and T-shaped steel embedded in the ballast retaining wall bears large bending moment, the railing upright post is a free end and almost has no vertical live load effect, so that the bracket is designed to be triangular most reasonably from the structural stress angle, and the solid core is adopted to be favorable for the stress of a composite material structure; under the action of the transverse bridge bending moment, the upper flange and the lower flange of the bracket are stressed greatly, so that the bracket is designed into an I shape; the connecting part of the support web and the embedded T-shaped steel in the ballast retaining wall not only needs to bear the action of a large bending moment, but also needs to bear the action of local pressure generated by screwing a high-strength bolt, so that the web at the position of the support is thickened. In order to prevent the web of the bracket from local buckling, vertical stiffening ribs are arranged on the web. In order to achieve the purpose that the cable trough is arranged above the bracket and below the walking plate, the heights of the vertical connecting piece inside the upper flange of the bracket and the boss outside the upper flange of the bracket must be increased. For the purpose of longitudinal arrangement of the footplate, a cross beam must be provided. Because the walking board is light, in order to prevent the walking board from being overturned under the condition of upwind live load, the walking board is fixed on the cross beam, and the cross beam is fixed with the bracket, so that the live load is transmitted to the bracket and finally to the ballast blocking wall.
Example 2
This embodiment is different from embodiment 1 in that the step plate 6 is fixed to the cross member 5 by a pressing plate 8 as shown in fig. 2. Correspondingly, as shown in fig. 4, a first notch 151 and a second notch 152 are sequentially arranged from bottom to top on the vertical connecting piece 15 arranged at one end, close to the ballast blocking wall 10, of the bracket upper flange 11, and the clear distance between the first notch 151 and the second notch 152 is equal to the height of the walking plate 6. The shape and geometry of the first notch 151 are the same as those of the cross-section of the cross-beam 5, and the shape and geometry of the second notch 152 are the same as those of the cross-section of the platen 8. The joint of the railing column 2 and the upper flange 11 of the bracket is provided with a boss 221, and the upper part of the boss is provided with a bolt hole. The height of the boss 221 is equal to the clear distance between the bracket upper flange 11 and the cross beam 5. The purpose of the bosses 221 is to support the cross beam 5. A first transverse connecting piece 222 and a second transverse connecting piece 223 are arranged on the inner flange 22 above the boss 221 from bottom to top, and bolt holes are formed in the first transverse connecting piece 222 and the second transverse connecting piece 223 and correspond to the bolt holes in the boss 221. The clear distance between the first cross connector 222 and the boss 221 is equal to the height of the cross beam 5, and the elevation of the bottom surface of the second cross connector 223 is the same as the elevation of the top surface of the second slot 152.
The fixing mode that the walking plate 6 is fixed by the pressing plate 8 is adopted, when the walking plate is installed on site, the inner side end of the cross beam 5 is inserted into the first notch 151, and the inner side end of the pressing plate 8 is inserted into the second notch 152; the outer end of the cross beam 5 is inserted between the boss 221 and the second transverse connecting piece 223, the outer end of the press plate 8 is inserted between the first transverse connecting piece 222 and the second transverse connecting piece 223, and then the press plate 8 and the cross beam 5 are fixed on the railing post 2 by using a limiting bolt 51, so that the upper and lower positions of the press plate 8 and the cross beam 5 are limited, and the walking plate 6 is prevented from being turned over under the action of upward wind load.
When the fixing mode that the pressure plate 8 fixes the walking plate 6 is adopted, the baffle plates 52 along the length direction of the crossbeam 5 are arranged on the upper surface of the crossbeam 5, and the baffle plates 52 are vertically arranged, as shown in fig. 5, so that the purpose of preventing the walking plate from longitudinally shifting is realized.
The support 1, the railing post 2, the vertical connecting piece 15, the middle support 16, the boss 221, the first transverse connecting piece 222 and the second transverse connecting piece 223 are integrally formed.
The following steps of installing a concrete beam composite sidewalk when a cable trough is positioned below a longitudinally-arranged walking plate are introduced when the walking plate is fixed by a pressing plate:
(1) checking and correcting the position of the T-shaped steel embedded in the concrete beam ballast wall after the construction is finished, as shown in figure 6 a;
(2) connecting and installing the composite sidewalk bracket and the railing post by adopting a high-strength bolt, as shown in fig. 6 b;
(3) the anti-roll bar is installed by rivet pulling connection, as shown in fig. 6 c;
(4) cable troughs for installing built-in cables and signal cables, as shown in fig. 6 d;
(5) mounting the cross beam, inserting the inner end of the cross beam into the first notch, and inserting the outer end of the cross beam between the boss and the first cross beam connector, as shown in fig. 6 e;
(6) paving the walking boards on two adjacent brackets one by one, as shown in fig. 6 f;
(7) installing a pressing plate, inserting the inner end of the pressing plate into the second notch, inserting the outer end of the pressing plate between the first cross beam connecting piece and the second transverse connecting piece, and then inserting a limiting bolt for fixing, as shown in fig. 6 g;
(8) the balustrade handrail is threaded one by one and the installation is completed as shown in fig. 6 h.
Example 3
The invention is suitable for the condition that the cable trough is positioned on the support extension section at the outer side of the railing post, as shown in fig. 7, a cross beam is not arranged, and the walking plate 6 is fixed on the support upper flange 11 by adopting a large round head bolt 7; the vertical connecting member 15, the intermediate support 16, the boss 221, the first transverse connecting member 222, and the stopper bolt 51 are not provided, and other configurations are the same as those of embodiment 1.
Example 4
The invention is suitable for the situation that the cable trough is positioned on the extending section of the bracket outside the railing post, as shown in fig. 8, the cross beam 5 is not arranged, the walking plate is fixed on the upper flange 11 of the bracket by adopting a pressing plate, and the vertical connecting piece 15, the middle support 16, the boss 221 and the first transverse connecting piece 222 are not arranged, besides, other structures are the same as those of the embodiment 2.
Example 5
The invention is suitable for the situation without cable trough, as shown in fig. 9, the beam is not arranged, but the walking plate 6 is fixed on the upper flange 11 of the bracket by the round head bolt 7; meanwhile, the vertical connecting member 15, the intermediate support 16, the boss 221, the first lateral connecting member 222, and the stopper bolt 51 are not provided, except that other configurations are the same as those of embodiment 1.
Example 6
The present invention is applied to the case where there is no cable groove, as shown in fig. 10, except that the cross beam 5 is not provided, the step plate is fixed to the bracket upper flange 11 using the pressing plate, and the vertical connecting member 15, the middle support 16, the boss 221, and the first horizontal connecting member 222 are not provided, other configurations are the same as those of embodiment 2.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a cable duct is located concrete beam combined material pavement of indulging walking board below which characterized in that includes:
a plurality of supports (1) are fixed on the outer side of the ballast retaining wall (10), the plurality of supports (1) are sequentially arranged along the longitudinal direction of the ballast retaining wall (10), one end of each support (1) is fixed on T-shaped steel (101) pre-buried in the ballast retaining wall (10), and the other end of each support (1) is fixedly connected with a railing upright post (2);
a cross beam (5) is horizontally fixed above the support (1) along the transverse direction of the ballast blocking wall (10), a cable groove is arranged between the top of the support (1) and the cross beam (5), and a walking plate (6) is longitudinally supported on the cross beam (5);
one end, close to the ballast retaining wall (10), of the top of the support (1) is provided with a vertical connecting piece (15), and the top of the vertical connecting piece (15) is provided with a first notch (151); a boss (221) is arranged at the joint of the top of the bracket (1) and the railing post (2), a first transverse connecting piece (222) is arranged above the boss, the first transverse connecting piece (222) is horizontally fixed on the railing post (2), and bolt holes are respectively arranged at corresponding positions above the boss (221) and the first transverse connecting piece (222); one end of the cross beam (5) is inserted into the first notch (151), and the other end of the cross beam is inserted between the boss (221) and the first transverse connecting piece (222) and fixed through a limiting bolt (51);
a vertical middle support (16) is arranged in the middle of the top of the support (1), and the elevation of the top surface of the vertical middle support (16) is the same as that of the bottom surface of the cross beam (5) and is used for supporting the cross beam (5) in an auxiliary manner;
the support (1), the railing upright post (2), the vertical connecting piece (15), the middle support (16), the boss (221) and the first transverse connecting piece (222) are integrally formed.
2. The concrete beam composite sidewalk with the cable trough below the longitudinally-arranged walking plate according to claim 1, wherein the support (1) is I-shaped along the vertical plane of the bridge, the transverse bridge is a solid triangle, the support (1) comprises an upper flange (11), a lower flange (12) and a support web (13) located between the upper flange (11) and the lower flange (12), a vertical stiffening rib (14) is arranged on the support web (13), and the vertical stiffening rib (14) is connected with the upper flange (11) and the lower flange (12).
3. The concrete beam composite sidewalk with the cable trough below the longitudinally arranged walking boards according to claim 2, wherein the side, close to the ballast retaining wall (10), of the bracket web (13) is a locally thickened web (131), circular bolt holes (132) are formed in the locally thickened web (131), and the bracket (1) is fixed on the T-shaped steel (101) through high-strength bolts (102).
4. A concrete beam composite walkway according to claim 2, wherein the cable trough is located below the longitudinally placed footplate, wherein the bracket web (13) near the railing post (2) side is provided with a local reinforcement circular hole (17) for installing an anti-roll bar (4).
5. A concrete beam composite walkway according to claim 1, wherein the cable trough is located below the longitudinally placed footplate, characterized in that the footplate (6) is fixed to the cross-beam (5) by means of a number of large round head bolts (7), wherein the footplate (6) and the cross-beam (5) are provided with a number of bolt holes at corresponding positions, respectively.
6. A concrete beam composite walkway according to claim 1, wherein the walkway plates (6) are fixed to the cross beams (5) by means of pressure plates (8):
a second notch (152) is formed above the first notch (151) in the vertical connecting piece (15), a second transverse connecting piece (223) is arranged above the first transverse connecting piece (222), the second transverse connecting piece (223) is also horizontally fixed on the railing column (2), one end of the pressing plate (8) is inserted into the second notch (152), and the other end of the pressing plate is inserted between the first transverse connecting piece (222) and the second transverse connecting piece (223) and is fixed through a limiting bolt (51);
the middle position of the upper surface of the cross beam (5) is provided with a baffle (52) along the length direction of the cross beam, and the baffle is vertically arranged and used for preventing the longitudinal dislocation of the walking plate.
7. A concrete beam composite walkway according to claim 6, wherein the bracket (1), railing post (2), vertical connectors (15), intermediate support (16), boss (221), first transverse connectors (222) and second transverse connectors (223) are integrally formed.
8. The concrete beam composite sidewalk with the cable trough below the longitudinally arranged walking plates according to claim 7, wherein the bracket (1), the railing post (2), the cross beam (5) and the pressing plate (8) are all made of fiber reinforced composite materials, and a plurality of layers of multidirectional reinforced fiber felts are distributed in each component; the fiber reinforced composite material is a multiphase material formed by winding, die pressing, vacuum infusion, pultrusion or resin transfer molding processes of a reinforcing material and a base material, wherein the base material is any one of unsaturated polyester resin, vinyl resin, epoxy resin, polyurethane resin or phenolic resin, and the reinforcing fiber is any one of glass fiber, basalt fiber or carbon fiber.
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| CN201910770524.1A CN110438887B (en) | 2019-08-20 | 2019-08-20 | Concrete beam composite material sidewalk with cable trough below longitudinally-arranged walking plate |
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