CN210856799U - Track traffic prefabricated plate - Google Patents

Abstract

The utility model discloses a rail transit precast slab, which comprises a slab body (1) and a cover plate (2), wherein the slab body (1) and the cover plate (2) form an integral structure through a cover plate connecting assembly, and are detachably connected; the cover plate connecting assembly comprises a bearing piece (3) and a fixing piece (4), the bearing piece (3) is arranged between the two longitudinal beams (11) through an embedded part (111), and the fixing piece (4) fixedly connects the cover plate (2) with the bearing piece (3); the plate body (1) comprises two longitudinal beams (11) which are arranged along the extending direction of a track, a cross beam (12) is arranged between the two longitudinal beams (11), and a plurality of embedded parts (111) are uniformly arranged on one opposite sides of the two longitudinal beams (11) so as to be fixedly connected with the cover plate connecting assembly. Track traffic prefabricated plate, simple structure, the on-the-spot processing of being convenient for, the efficiency of construction is high, the precision is controllable, application scope is wide.

Description

Track traffic prefabricated plate

Technical Field

The utility model relates to a track traffic field, concretely relates to track traffic prefabricated plate.

Background

In the existing urban rail transit, a prefabricated plate type rail structure is widely applied and developed, the middle part of a commonly applied trapezoid prefabricated plate is of a hollow structure, so that in order to meet the requirements of personnel walking and emergency evacuation, the hollow part needs to be covered by a cover plate, and a continuous channel is formed in the center of a rail.

The apron that adopts at present is reinforced concrete structure, and it is installed at the inboard base top surface of trapezoidal prefabricated plate, has following not enough in the use:

(1) the dead weight of the single cover plate is about 50-60 kg, the single cover plate is difficult to disassemble, assemble and carry manually, troubles are brought to the inspection and cleaning of a drainage ditch below the single cover plate, and the cover plate is easy to knock and damage in the disassembling, assembling and carrying processes;

(2) the apron is installed at the base top, because the base top forms for cast in place, and the smoothing degree of plastering is very difficult to control, often leads to the apron top surface uneven, and the apron is installed unstably, can influence personnel's walking, and the people walk and often can produce rocking and the sound of colliding of not hard up apron.

The construction process of track laying is complicated, laying efficiency is low, laying effect is poor due to the reasons, and the track laying is not beneficial to maintenance.

Therefore, there is a need for a rail transit prefabricated panel capable of solving the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems, the inventor of the present invention has conducted an intensive study to design a track traffic prefabricated slab, which is manufactured by selecting a light material with a smaller density to manufacture a cover plate, integrally lays the cover plate or lays a plurality of cover plate assemblies, and sets different cover plate connecting assemblies respectively, so that the detachable connection of the cover plate and the slab body can be realized, the laying efficiency and quality are improved, and the utility model discloses thereby, the present invention is completed.

In particular, the utility model aims to provide a rail transit precast slab, wherein, the rail transit precast slab comprises a slab body 1 and a cover plate 2 which form an integral structure through a cover plate connecting component,

the plate body 1 and the cover plate 2 are detachably connected;

the cover plate connecting assembly comprises a bearing piece 3 and a fixing piece 4, wherein the bearing piece 3 is arranged between two longitudinal beams 11 through an embedded part 111, and the fixing piece 4 fixedly connects the cover plate 2 with the bearing piece 3;

the panel body 1 comprises two longitudinal beams 11 arranged along the extension direction of the rail, a cross beam 12 arranged between the two longitudinal beams 11,

a plurality of embedded parts 111 are uniformly arranged on one side of the two longitudinal beams 11 opposite to each other to fixedly connect the cover plate connecting assembly, and the distance between every two adjacent embedded parts is 0.5-1.2 m;

the cover plate 2 is rectangular, the thickness of the cover plate is 20-40 mm, and the mass per square meter is 40-80 kg.

The cover plate 2 is formed by combining and laying a plurality of cover plate units 21 with the same structure or integrally laying the cover plate units, the cover plate units 21 are combined and laid along the extending direction of the track,

the cover plate unit 21 is rectangular, a plurality of first through holes 22 are uniformly formed in the middle area of the top surface thereof,

the distance between the long side of the cover plate unit 21 and the two longitudinal beams is matched, and the ratio of the wide side of the cover plate unit 21 to the length of the longitudinal beams is 1: (8-15) of a first step,

a U-shaped through hole 23 is formed in the edge of the wide side of the cover plate unit 21, and the number of the U-shaped through holes 23 is even;

when the cover plate 2 is integrally laid, a plurality of second through holes 24 are formed in the top surface area, the length of the second through holes along the extending direction of the track is the same as that of the cover plate track,

the cover plate is divided into a plurality of separated H-shaped units by the second through holes 24, and the H-shaped units are fixedly connected into a whole cover plate through transverse purlines.

The first through holes 22 are oblong holes or rectangular holes, and the plurality of first through holes are arranged in rows;

the ratio of the total area of the plurality of first through holes 22 to the upper surface area of each cover plate unit 21 is 1: (100-200).

The second through holes 24 are rectangular, and the plurality of second through holes 24 are arranged in parallel.

When the cover plate 2 is formed by a plurality of combined laying, the bearing piece 3 is arranged along the extending direction of the track and matched with the cover plates formed by the combined laying;

the length of the carrier 3 in the rail extension direction is the same as the length of the longitudinal beam 11.

Wherein the carrier 3 comprises a vertical plate and a horizontal plate, which are at 90 degrees, the horizontal plate is connected with the top end of the vertical plate,

a first pre-connecting nut 33 is arranged on the lower surface of the horizontal plate of the bearing part 3, and the position of the first pre-connecting nut corresponds to the position of the U-shaped through hole 23 of the cover plate unit 21 so as to facilitate the connection of the fixing parts.

When the cover plate 2 is integrally laid, the bearing piece 3 is arranged along the direction perpendicular to the extending direction of the track and is matched with the integrally laid cover plate;

the carrier 3 comprises a first supporting beam 31 and a second supporting beam 32 which are arranged at intervals, the first supporting beam 31 coincides with the beam 12 of the plate body 1, and the distance between the adjacent first supporting beam 31 and the second supporting beam 32 is 0.6-1.2 m.

Wherein, a second pre-connection nut 34 is arranged on the upper surface of the first supporting beam 31 to be fixedly connected with the cover plate;

the second support beam 32 comprises a beam body 321 and connecting pieces 322 connected to two ends of the beam body, and the connecting pieces 322 are fixedly connected with the embedded parts 111 inside the longitudinal beams through bolts.

The fixing part 4 comprises a clamping plate 41 arranged on the upper surface of the cover plate 2, and a third through hole is arranged at the central position of the clamping plate 41;

the fixing member 4 further includes a bolt disposed in the third through hole, and the bolt passes through the third through hole and enters into the second pre-connection nut 34 disposed on the upper surface of the first supporting beam 31, so that the cover plate is fixedly connected with the first supporting beam.

Wherein, the clamping plate 41 is a C-shaped steel with an opening facing downwards.

When the cover plate 2 is formed by combining and laying a plurality of cover plates, the elastic modulus of the cover plate 2 is more than or equal to 46GPa, the bending compressive strength is more than or equal to 110MPa, the bending tensile strength is more than or equal to 16MPa, the allowable stress of bending and eccentric compression is more than or equal to 55MPa, and the allowable stress of bending tension is more than or equal to 8 MPa;

when the cover plate 2 is integrally laid, the bending strength of the cover plate 2 is more than or equal to 250MPa, the compression strength is more than or equal to 80MPa, and the bending elastic modulus is more than or equal to 20 GPa.

The utility model discloses the beneficial effect who has includes:

(1) the track traffic prefabricated plate has the advantages of simple structure, convenient on-site processing, high construction efficiency, controllable precision and wide application range;

(2) the track traffic prefabricated slab has the advantages of small thickness of the cover plate, light weight, regular surface, uniform size, good laying effect and convenient maintenance;

(3) the track traffic prefabricated plate of the utility model greatly improves the laying efficiency and connection stability of the plate body and the cover plate by arranging the embedded parts in the plate body;

(4) the track traffic prefabricated plate of the utility model has the advantages that through the through holes with specific sizes arranged on the cover plate, the weight of the cover plate is reduced, the construction difficulty is reduced, the vertical displacement of the cover plate is reduced, and the safety and stability are improved;

(5) track traffic prefabricated plate, with the original crossbeam of plate body as the partly that holds carrier, both saved a large amount of costs, improved the steadiness of apron connection again.

Drawings

Fig. 1 is a schematic overall structure diagram of a rail transit precast slab according to a preferred embodiment of the present invention;

fig. 2 is a schematic side view of a track traffic prefabricated slab according to a preferred embodiment of the present invention;

fig. 3 shows a schematic structural view of a cover plate unit according to a preferred embodiment of the present invention;

FIG. 4 is a schematic view showing the positional relationship between the carrier and the fixing member according to a preferred embodiment of the present invention;

fig. 5 is a schematic overall structure diagram of a rail transit precast slab according to another preferred embodiment of the present invention;

fig. 6 is a schematic side view showing a construction of a rail transit precast slab according to another preferred embodiment of the present invention;

fig. 7 is a schematic view showing a positional relationship between the carrier and the fixing member according to another preferred embodiment of the present invention.

The reference numbers illustrate:

1-a plate body;

11-a longitudinal beam;

111-an embedded part;

12-a cross beam;

2-cover plate;

21-a cover plate unit;

22-a first via;

23-U-shaped through holes;

24-a second via;

25-a coupling sleeve;

3-a carrier;

31-a first support beam;

32-a second support beam;

321-a beam body;

322-a connector;

33-a first pre-coupling nut;

34-a second pre-coupling nut;

4-a fixing piece;

41-splint.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and embodiments. The features and advantages of the present invention will become more apparent from the description. In which, although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

The utility model provides a track traffic prefabricated slab, as shown in figures 1 to 7, the track traffic prefabricated slab comprises a slab body 1 and a cover plate 2, which form an integrated structure through a cover plate connecting assembly;

the plate body 1 and the cover plate 2 are detachably connected.

According to a preferred embodiment of the invention, the panel body 1 comprises two longitudinal beams 11, which are arranged in the extension direction of the rail,

a cross beam 12 is arranged between the two longitudinal beams 11.

The longitudinal beams are prefabricated, steel rails are laid on the tops of the longitudinal beams, the base is arranged below the longitudinal beams, and the two longitudinal beams are connected into a whole through the cross beam, so that the whole plate body 1 is trapezoidal.

The cross beam can be made of metal, concrete or preferably metal.

In a further preferred embodiment, a plurality of embedded parts 111 are uniformly arranged on the opposite sides of the two longitudinal beams 11 to fix the cover plate connecting assembly.

In a further preferred embodiment, the embedment 111 is a nylon sleeve.

In the present invention, the specification of the nylon sleeve is selected according to actual needs, for example, M12 nylon sleeve or M16 nylon sleeve can be adopted.

Preferably, the distance between the adjacent embedded parts is 0.5-1.2 m, and preferably 0.6-1.2 m.

The utility model discloses in, set up the built-in fitting into foretell interval distance, be favorable to improving the stability of being connected with apron coupling assembling, and can guarantee the safe handling of apron.

The utility model discloses in, the track traffic prefabricated plate be single block track traffic prefabricated plate, be 6 m's track traffic prefabricated plate like length.

According to a preferred embodiment of the present invention, the cover plate 2 is rectangular and has a certain thickness, and the fit is provided between the two longitudinal beams 11.

In a further preferred embodiment, the cover plate 2 has a thickness of 20 to 40mm and a mass per square meter of 40kg to 80 kg.

According to a preferred embodiment of the present invention, as shown in fig. 1 to 4, the cover plate 2 is a multi-block composite structure, which comprises a plurality of cover plate units 21 with the same structure,

the plurality of cover plate units 21 are laid in combination along the track extending direction.

In a further preferred embodiment, the cover plate unit 21 is rectangular, and a plurality of first through holes 22 are uniformly formed in a central region of a top surface thereof.

Preferably, the long side of the cover plate unit 21 matches with the distance between two longitudinal beams, and the ratio of the wide side of the cover plate unit 21 to the length of the longitudinal beam is 1: (8-15), preferably 1: (8-12).

The long side of the cover plate unit 21 is a side perpendicular to the longitudinal beam, and the wide side is a side along the extending direction of the rail.

In a further preferred embodiment, the first through hole 22 is an oblong hole or a rectangular hole, the long axis of which is perpendicular to the longitudinal beam.

Preferably, the first through holes 22 are arranged in rows having 3 to 10 rows, and each row has 2 to 8.

Wherein the major axes of the first through holes in each row are collinear.

More preferably, the ratio of the total area of the plurality of first through holes 22 to the upper surface area of each cover plate unit 21 is 1: (100-200).

According to a preferred embodiment of the present invention, the first through hole 22 is a long circular hole, the long straight side of which is perpendicular to the two longitudinal beams 11.

The long round hole is formed by two long straight sides arranged in parallel and arcs at two ends of the long straight sides.

More preferably, the plurality of first through holes 22 are arranged in a row.

The inventor researches and discovers that the cover plate can be lightened when the same area is applied on the premise of meeting the use requirement of the cover plate by arranging the first through hole on the cover plate.

According to a preferred embodiment of the present invention, the wide edge of the cover plate unit 21 is provided with a U-shaped through hole 23 so that the fixing member 4 can pass through and be fixedly connected with the plate body 1.

In a further preferred embodiment, the U-shaped through holes 23 have a plurality, preferably an even number, evenly distributed on both broadside edges of the cover unit 21.

Preferably, the opening ends of the U-shaped through holes on both sides of the cover plate unit 21 are opposite in direction.

In a further preferred embodiment, said U-shaped through holes 23 have 2.

According to a preferred embodiment of the present invention, the cover plate 2 is made of Reactive Powder Concrete (RPC).

The Reactive Powder Concrete (RPC) is similar to a concrete material, but has low density, is formed in one step by taking inorganic mineral substances as a main material and plant fibers as a reinforcing material and adding an inorganic binder, a filler and the like, is non-combustible and does not explode at the high temperature of 1200 ℃, and has the fireproof performance reaching the A-level standard. The cover plate manufactured by adopting the method can obviously reduce the thickness and the dead weight, and is convenient to carry and install; the cover plate module is formed by one-time pouring through a mould, the surface is regular, and the sizes are uniform; the anti-aging performance is good, the manual carrying and the maintenance are not easy to damage, and the service life is long.

According to a preferred embodiment of the present invention, the cover plate 2 has an elastic modulus of 46GPa or more, a bending compressive strength of 110MPa or more, a bending tensile strength of 16MPa or more, a bending and eccentric compressive tolerance of 55MPa or more, and a bending tensile tolerance of 8MPa or more.

In the present invention, the elastic modulus of the cover plate 2 may be 46GPa, the bending compressive strength is 110MPa, the bending tensile strength is 16MPa, the allowable stress for bending and eccentric compression is 55MPa, and the allowable stress for bending tension is 8 MPa.

According to another preferred embodiment of the present invention, as shown in fig. 5 to 7, the cover plate 2 is integrally laid.

The integral laying is that the cover plate is cut according to gaps between the longitudinal beams and then laid, and the integral laying is not combined laying.

In a further preferred embodiment, the cover plate 2 is rectangular, and has a plurality of second through holes 24 opened in a top surface area thereof,

the second through hole 24 is rectangular, and the length along the track extending direction is the same as the length along the cover track extending direction.

In a further preferred embodiment, the plurality of second through holes 24 are arranged in parallel.

The cover plate is made to form a structure similar to a grid through the second through holes formed in the cover plate, so that the weight of the cover plate can be reduced, and the vertical displacement of the cover plate can be reduced.

Preferably, the vertical section of the cover plate is in an I shape like the above.

The cover plate is divided into a plurality of separated H-shaped units by the second through holes 24, and the H-shaped units are fixedly connected into a whole cover plate through transverse purlines.

According to a preferred embodiment of the present invention, the cover plate 2 is a phenolic resin cover plate made of glass fiber reinforced phenolic resin.

The phenolic resin cover plate is made of glass fiber reinforced phenolic resin through a pultrusion process, and has the following advantages: compared with metal and concrete materials, the material has light weight, is convenient for field processing, and can modify the size at any time according to the condition of a construction field; the electric insulation property is good, and the acid and alkali medium resistance and the temperature resistance are good; the ultraviolet aging resistance is good, and the service life is long; the mechanical property is excellent; the fire-proof performance is excellent, and the fire-fighting grade reaches A2 grade.

In a further preferred embodiment, the cover plate 2 has a flexural strength of 250MPa or more, a compressive strength of 80MPa or more, and a flexural modulus of elasticity of 20GPa or more.

In a further preferred embodiment, in the direction of extension of the rails, adjacent cover plates are connected by end coupling sleeves 25,

preferably, the end coupling sleeve 25 is a square steel tube.

Wherein, an end coupling sleeve is arranged between the adjacent cover plates for preventing the cantilever part of the end of the cover plate from over-deflection.

According to a preferred embodiment of the present invention, the cover connection assembly comprises a carrier 3 and a fixing member 4, wherein,

the bearing part 3 is arranged between the two longitudinal beams 11 through an embedded part 111, and the fixing part 4 fixedly connects the cover plate 2 and the bearing part 3.

According to a preferred embodiment of the present invention, as shown in fig. 1 and 2, the supporting member 3 is disposed along the extending direction of the rail, and is disposed in cooperation with the cover plates laid by combining a plurality of blocks.

In a further preferred embodiment, the length of the carrier 3 in the rail extension direction is the same as the length of the longitudinal beam 11.

According to a preferred embodiment of the invention, the carrier 3 comprises a vertical plate and a horizontal plate, which are arranged at 90 degrees, the horizontal plate being connected to the top end of the vertical plate,

preferably, the vertical plate and the horizontal plate have the same length.

More preferably, the carrier 3 is an angle steel, and preferably, the surface thereof is treated by hot galvanizing.

In a further preferred embodiment, the vertical plates of the carrier 3 are arranged next to the inner side of the longitudinal beam 11 and are fixedly connected by means of bolts.

The bolts penetrate through the vertical plates of the bearing parts and are fixedly connected in the embedded parts (nylon sleeves), so that the bearing parts are fixedly connected with the plate body.

In a further preferred embodiment, a first pre-coupling nut 33 is provided on the lower surface of the horizontal plate of the carrier 3, at a position corresponding to the position of the U-shaped through hole 23 of the cover unit 21, to facilitate the fastener connection.

The positions of the pre-connecting nuts correspond to the positions of the U-shaped through holes, the number of the pre-connecting nuts is the same, and the nuts are preferably welded on the bearing piece in advance.

According to a preferred embodiment of the present invention, the fixing member 4 comprises a bolt and a washer,

the U-shaped through-hole is passed to the bolt bottom, and then in the pre-connection nut that holds carrier is gone into downwards to it is fixed to hold carrier with the apron.

In a further preferred embodiment, the washer is a single layer spring washer.

According to another preferred embodiment of the invention, as shown in fig. 5 and 6, the carrier 3 is arranged perpendicular to the direction of extension of the rail, which is arranged in cooperation with an integrally laid cover plate.

In a further preferred embodiment, the carrier 3 comprises a first support beam 31 and a second support beam 32,

wherein, the first supporting beam 31 coincides with the cross beam 12 of the plate body 1, and the second supporting beam 32 is arranged at an interval with the first supporting beam 31.

The utility model discloses in, because the apron is laid for whole, the event need not to set up and holds carrier along track extending direction, and the preferred inherent crossbeam of plate body that utilizes sets up the second supporting beam together as the carrier that holds of apron as first supporting beam, deuterogamies.

Preferably, as shown in fig. 7, a second pre-coupling nut 34 is provided on an upper surface of the first supporting beam 31 to be fixedly coupled with the cover plate.

In a further preferred embodiment, the distance between the adjacent first supporting beam 31 and the second supporting beam 32 is 0.4 to 1.6m, preferably 0.6 to 1.2 m.

According to a preferred embodiment of the present invention, the second support beam 32 includes a beam body 321 and connecting members 322 connected to both ends of the beam body 321, wherein,

the beam body 321 is welded and fixed with the connecting piece 322, and the connecting piece 322 is fixedly connected with the embedded part 111 inside the longitudinal beam 11 through a bolt.

In a further preferred embodiment, the beam 321 is a channel, and the connector 322 is an angle iron.

The opening of the channel steel is downwards welded and fixed with the angle steel, and the horizontal plate of the angle steel is connected with the bottom end of the vertical plate.

According to a preferred embodiment of the present invention, the fixing member 4 includes a clamping plate 41 disposed on the upper surface of the cover plate 2, and a third through hole is disposed at a central position of the clamping plate 41.

In a further preferred embodiment, the fixing member 4 further comprises a bolt disposed in the third through hole, and the bolt passes through the third through hole and enters the second pre-connection nut 34 disposed on the upper surface of the first supporting beam 31, so that the cover plate is fixedly connected with the first supporting beam.

In a further preferred embodiment, the clamping plate 41 is a C-shaped steel, which is provided with an opening facing downwards,

preferably, the clamping plates 41 are clamped on two side plate surfaces of the second through hole at the outermost side of the cover plate 2.

More preferably, the diameter of the third through hole is the same as the width of the second through hole 24.

The bolt is matched with the washer and connected with the second pre-connecting nut, so that the cover plate is fixed with the first supporting beam.

Examples

Example 1

Make the utility model discloses in the track traffic prefabricated plate, wherein, the apron is laid for the polylith combination.

Specifically, the method comprises the following steps:

the specification of the plate body is as follows: the length of each longitudinal beam is 6000mm, the width of each longitudinal beam is 580mm, and the distance between the two longitudinal beams is 840 mm; m16 nylon sleeves are embedded in the plate body, bolts fixed with the angle steel are M12, and L is 60 mm;

the cover plate has the specification that 10 cover plate units are laid on each plate body, the size of each cover plate unit is 820 × 590 × 30mm (length × width × thickness), the strength grade is R130, the elastic modulus is 46GPa, the design value of bending compression strength is 110MPa, the bending tensile strength is 16MPa, the allowable stress of bending and eccentric compression is 55MPa, the allowable stress of bending tension is 8MPa, the self weight is 30kg, and the material is Reactive Powder Concrete (RPC);

each cover plate unit is provided with two U-shaped through holes, and 2 sets of bolts (M12, L is 50mm) are matched;

the top surface of each cover plate unit is provided with 28 oblong holes (7 rows × 4 columns)

The specification of the angle steel is 50 × 50 × 5mm (length × width × thickness).

And analyzing the bearing capacity and deformation of the prepared track traffic prefabricated slab with the specification, wherein the load working conditions are as follows: and (3) uniformly distributing the load when P is 5kPa, and displaying the calculation result: the maximum bending moment of each cover plate unit is 0.248kN ∙ m, the maximum tensile stress of a tension area is 4.43MPa, and the maximum compressive stress of a compression area is 4.39MPa, which are all smaller than the allowable value; the maximum vertical deflection of the cover plate is 0.39mm, and the deformation resistance is good.

Example 2

Make the utility model discloses in the track traffic prefabricated plate, wherein, the apron is for wholly laying.

Specifically, the method comprises the following steps:

the specification of the plate body is as follows: the length of each longitudinal beam is 6000mm, the width of each longitudinal beam is 580mm, and the distance between the two longitudinal beams is 840 mm; m16 nylon sleeves are embedded in the plate body, the distance between the sleeves is 1200mm, bolts fixed with angle steel are M16, and L is 80 mm;

the specification of the cover plate is 5980 × 806 × 48mm (length × width × thickness), the material is phenolic resin cover plate, the bending strength is 250MPa, the compression strength is 80MPa, the bending elastic modulus is 20 GPa;

the lower part of the cover plate comprises 3 original beams of the trapezoidal prefabricated plate and 2 encrypted beams, wherein each encrypted beam comprises galvanized steel channels (80 × 43 × 5mm (length × and width × mm)), and galvanized angle steels ((50 × 50 × 5) mm, and L is 225 mm);

the length of the through hole arranged on the top surface of the cover plate is 5980mm, the width of the through hole is 20mm, and the connecting sleeve at the end part of the adjacent cover plate is a galvanized square steel pipe with the size of 56 × 53 × 2mm (the length is ×, and the width is × mm).

And analyzing the bearing capacity and deformation of the prepared track traffic prefabricated slab with the specification, wherein the load working conditions are as follows: and (3) uniformly distributing loads (P is 5 kPa), and respectively calculating according to cantilever parts uniformly distributed on the middle span and the side span.

And (3) displaying a calculation result:

when the load is uniformly distributed in the middle span, the maximum tensile stress of the cover plate is 3.51MPa, and the maximum compressive stress is 6.18MPa, which is smaller than an allowable value; the maximum deflection deformation of the cover plate is 0.34mm, and the deformation resistance is good;

when the load is uniformly distributed on the side span cantilever part, the maximum tensile stress of the cover plate is 4.33MPa, and the maximum compressive stress is 9.2MPa, which is smaller than an allowable value; the maximum deflection deformation of the cover plate is 0.89mm, and the deformation resistance is good.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", and the like indicate the position or positional relationship based on the operation state of the present invention, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention has been described above in connection with preferred embodiments, which are merely exemplary and illustrative. On this basis, can be right the utility model discloses carry out multiple replacement and improvement, these all fall into the utility model discloses a protection scope.

Claims (9)

1. The rail transit precast slab is characterized by comprising a slab body (1) and a cover plate (2) which form an integral structure through a cover plate connecting assembly,

the plate body (1) is detachably connected with the cover plate (2);

the cover plate connecting assembly comprises a bearing piece (3) and a fixing piece (4), the bearing piece (3) is arranged between the two longitudinal beams (11) through an embedded part (111), and the fixing piece (4) fixedly connects the cover plate (2) with the bearing piece (3);

the plate body (1) comprises two longitudinal beams (11) which are arranged along the extending direction of the track, a cross beam (12) is arranged between the two longitudinal beams (11),

a plurality of embedded parts (111) are uniformly arranged on one side, opposite to the two longitudinal beams (11), so as to fixedly connect the cover plate connecting assembly, and the distance between every two adjacent embedded parts is 0.5-1.2 m;

the cover plate (2) is rectangular, the thickness of the cover plate is 20-40 mm, and the mass per square meter is 40-80 kg;

the cover plate (2) is formed by a plurality of combined laying or integral laying,

when the cover plate (2) is formed by combining and laying a plurality of cover plate units (21) with the same structure, the cover plate units (21) are combined and laid along the extending direction of the track,

the cover plate unit (21) is rectangular, a plurality of first through holes (22) are uniformly formed in the middle area of the top surface of the cover plate unit,

the distance between the long side of the cover plate unit (21) and the two longitudinal beams is matched, and the ratio of the width side of the cover plate unit (21) to the length of the longitudinal beams is 1: 15 to 1 to 8 parts by weight of a binder,

u-shaped through holes (23) are formed in the wide edge of the cover plate unit (21), and the number of the U-shaped through holes (23) is even;

when the cover plate (2) is integrally laid, a plurality of second through holes (24) are arranged on the top surface area of the cover plate, the length of the second through holes along the extending direction of the track is the same as that of the cover plate track,

the cover plate is divided into a plurality of separated H-shaped units by the second through holes (24), and the H-shaped units are fixedly connected into a whole cover plate through transverse purlines.

2. The rail transit precast slab according to claim 1, wherein the first through-holes (22) are oblong holes or rectangular holes, and the plurality of first through-holes are arranged in a row;

a ratio of a total area of the plurality of first through holes (22) to an upper surface area of each cover plate unit (21) is 1: 200 to 1 to 100.

3. The rail transit precast slab according to claim 1, wherein the second through-holes (24) are rectangular, and the plurality of second through-holes (24) are arranged in parallel.

4. The rail transit precast slab according to claim 1, wherein when the cover plate (2) is a plurality of combined cover plates, the bearing member (3) is arranged along the extension direction of the rail and is matched with the plurality of combined cover plates;

the length of the bearing part (3) along the extension direction of the track is the same as that of the longitudinal beam (11).

5. The rail transit precast panel according to claim 4, wherein the carrier (3) comprises a vertical panel and a horizontal panel at 90 degrees, the horizontal panel being connected with a top end of the vertical panel,

and a first pre-connecting nut (33) is arranged on the lower surface of the horizontal plate of the bearing piece (3), and the position of the first pre-connecting nut corresponds to the position of the U-shaped through hole (23) of the cover plate unit (21) so as to facilitate the connection of the fixing piece.

6. The rail transit precast slab according to claim 1, characterized in that, when the cover slab (2) is integrally laid, the carriers (3) are arranged in a direction perpendicular to the extension direction of the rail, which are arranged in cooperation with the integrally laid cover slab;

the carrier (3) includes first supporting beam (31) and second supporting beam (32), and the two interval sets up, first supporting beam (31) and crossbeam (12) coincidence of plate body (1), the interval of adjacent first supporting beam (31) and second supporting beam (32) is 0.6 ~ 1.2 m.

7. The rail transit precast slab according to claim 6, wherein a second pre-coupling nut (34) is provided at the upper surface of the first support beam (31) to be fixedly coupled with the cover plate;

the second support beam (32) comprises a beam body (321) and connecting pieces (322) connected to two ends of the beam body, and the connecting pieces (322) are fixedly connected with embedded parts (111) in the longitudinal beam through bolts.

8. The rail transit precast slab according to claim 7, wherein the fixing member (4) comprises a clamping plate (41) provided on the upper surface of the cover plate (2), and a third through hole is provided at the center of the clamping plate (41);

the fixing piece (4) further comprises a bolt arranged in the third through hole, and the bolt penetrates through the third through hole to enter a second pre-connecting nut (34) arranged on the upper surface of the first supporting beam (31) so that the cover plate is fixedly connected with the first supporting beam.

9. The rail transit precast slab according to claim 8, wherein the clamping plate (41) is a C-shaped steel with an opening thereof disposed downward.

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