CN219260614U

CN219260614U - Assembled composite pavement structure

Info

Publication number: CN219260614U
Application number: CN202320023320.3U
Authority: CN
Inventors: 张斌; 常怀雷; 王首彬; 鹿群; 耿芹芹; 杨涛; 郭少龙
Original assignee: Stecol Corp
Current assignee: Stecol Corp
Priority date: 2023-01-05
Filing date: 2023-01-05
Publication date: 2023-06-27
Anticipated expiration: 2033-01-05

Abstract

The utility model provides an assembled composite pavement structure which comprises a unit precast slab and an asphalt concrete layer, wherein the unit precast slab is provided with tenons and grooves, the four side end surfaces of the unit precast slab are respectively provided with a half-arc-shaped connecting hole penetrating from the side end surface where the unit precast slab is positioned to the upper plate surface of the unit precast slab, after two adjacent unit precast slabs are bonded and spliced, the end parts of the two opposite half-arc-shaped connecting holes are connected in series to form an arc-shaped connecting hole for penetrating arc bolts, and the upper plate surface is also provided with a triangular pyramid groove. The assembled composite pavement uses the unit precast slabs to splice as a pavement main body, adopts tenon groove type splicing and arc bolts to rigidly connect, and compared with the horizontal anchoring rod rigid connection mode in the prior art, the arc bolts can disperse the tensile force part into pressure in the thickness direction of the unit precast slabs, so that the structural strength of the pavement is improved.

Description

Assembled composite pavement structure

Technical Field

The utility model belongs to the technical field of road construction, and particularly relates to an assembled composite pavement structure.

Background

The reinforced concrete pavement has simple form and uniform specification, and is suitable for assembly technology; the assembled pavement has obvious advantages in quality, progress and the like, and the prefabricated plate produced by factories has stable product quality; the prefabricated plate is assembled on site, so that the working procedure and the construction period are saved, the prefabricated plate is suitable for new construction and reconstruction road engineering with a tighter construction period, the rapid maintenance and rush repair operation of a traffic main road can be realized, and the prefabricated plate can be recycled;

the good connection between the precast slabs is an important link of pavement structure construction, the high-strength connection is a design requirement for guaranteeing the service life and the service strength of the pavement structure, and the connection strength is lower in a composite assembly type cement concrete pavement structure and a construction method thereof in a patent such as CN201910555537.7, the precast slabs are separated under the long-term action of uneven pavement load, and the precast slabs are spliced by adopting three precast slabs of an expansion joint slab, a standard slab and an anchor slab through stress tendons in a high-strength permanent pavement and a construction method thereof in a patent such as CN202010354927.0, so that the strength is high, but the splicing and the installation are complex, and a plurality of slabs are more required for production.

Disclosure of Invention

The utility model aims to provide an assembled composite pavement structure which is easy to splice and high in splicing strength, so that the problems in the background technology are solved.

The technical scheme of the utility model is realized as follows:

a fabricated composite pavement structure comprising:

the road surface structure comprises a plurality of unit precast slabs laid on a road bed, tenons are arranged on the end surfaces of two sides of each unit precast slab, corresponding grooves are formed in the end surfaces of the other two sides of each unit precast slab, a road surface main body is formed by splicing the tenons and the grooves, the long sides of the unit precast slabs are parallel to the running direction during splicing, the four side end surfaces of each unit precast slab are provided with half-arc-shaped connecting holes penetrating from the side end surfaces of the unit precast slabs to the upper plate surface of each unit precast slab, after the adjacent two unit precast slabs are attached and spliced, the end parts of the two opposite half-arc-shaped connecting holes are connected in series to form an arc-shaped connecting hole, and the upper plate surface is also provided with a triangular pyramid groove positioned at the other end part of the half-arc-shaped connecting hole;

the arc bolts are used for connecting two adjacent unit precast slabs and penetrate through the arc connecting holes, and two ends of each arc bolt extend into the triangular pyramid groove from the semi-arc connecting holes of the two adjacent unit precast slabs respectively;

the asphalt concrete layer is paved on the upper surface of the unit precast slab, and an adhesive layer is arranged between the asphalt concrete layer and the unit precast slab.

Preferably, the width of the unit precast slab is 300cm to 450cm, the aspect ratio is 1 to 1.35, and the thickness is 20 to 30cm.

More preferably, the unit precast slab comprises an upper fiber concrete layer and a lower cement concrete layer, wherein a reinforcing mesh is laid in the cement concrete layer in a flat manner, the reinforcing mesh is positioned at a position 1/4 of the thickness from the bottom surface of the unit precast slab, and the fiber volume content in the fiber concrete layer is 0.5% -1.5%.

Further preferably, the fiber concrete layer occupies one third of the total thickness of the unit precast slab, and the semi-arc-shaped connection holes penetrate through the fiber concrete layer and the cement concrete layer, respectively.

Further preferably, the bottom of the unit precast slab is provided with a plurality of crisscross slurry flow channel grooves which are of a semicircular groove structure and are communicated with a plurality of grouting holes arranged on the upper slab surface.

Still preferably, still include four rings that are pre-buried near four board angles of unit prefabricated plate, the last pull ring of rings is exposed by the lifting hole that the face set up on the unit prefabricated plate, and the lower extreme of rings stretches to cement concrete layer lower part and is connected with the reinforcing bar net.

Further preferably, after the unit precast slabs are spliced, a transverse splicing groove and a longitudinal splicing groove are reserved between opposite side end faces of two adjacent unit precast slabs respectively, and the groove widths of the transverse splicing groove and the longitudinal splicing groove are 4mm.

Still preferably, the upper plate surface of each unit precast slab is provided with five grouting holes, one of the grouting holes is positioned in the middle of the upper plate surface, the other four grouting holes are respectively arranged near four plate corners of the upper plate surface, the upper plate surface is also provided with an X-shaped anchoring groove communicated with the five grouting holes, an anchoring mechanism for rigidly connecting the unit precast slabs with the roadbed is arranged in the anchoring groove, the anchoring mechanism comprises an X-shaped anchoring frame and an anchoring nail, positioning columns are further arranged below the four end parts of the anchoring frame, the positioning columns are inserted into the grouting holes near the four plate corners, the anchoring frame is embedded in the anchoring groove, and the anchoring nail extends into the grouting holes in the middle of the upper plate surface from a round hole in the middle of the anchoring frame and is inserted into the roadbed for anchoring.

Compared with the prior art, the assembled composite pavement has the following beneficial effects:

1. the unit precast slabs are spliced to be used as a pavement main body, tenon groove type splicing is adopted, and arc bolts are used for penetrating and rigidly connecting, compared with the horizontal anchor rod rigid connecting mode in the prior art, the arc bolts can disperse tensile force parts into pressure in the thickness direction of the unit precast slabs, the rigid connecting mode can improve the connecting strength due to pressure resistance but non-tensile resistance of concrete, the upper layer of the unit precast slabs further adopts a fiber concrete layer, fibers are doped to enable the fiber concrete layer to have anisotropy, the local tension capacity is improved, and the rigid connecting strength of the arc bolts is further improved;

2. the unit precast slab is connected with the roadbed at the bottom through grouting, and the anchoring frame and the anchoring nails are installed through grouting holes, so that the whole unit precast slab is further rigidly connected with the roadbed, and the fixing strength of the unit precast slab is improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic view of a pavement structure according to the present disclosure;

FIG. 2 is a schematic perspective view of a unit prefabricated panel according to the present utility model;

FIG. 3 is a front view illustrating a unit prefabricated panel according to the present utility model;

fig. 4 is a schematic view of a splicing structure of a prefabricated unit panel according to the present utility model.

In the figure: 1. an asphalt concrete layer; 2. a unit precast slab; 21. a fibrous concrete layer; 211. a hoisting hole; 212. a semi-arc-shaped connecting hole; 213. triangular pyramid grooves; 22. a cement concrete layer; 23. a reinforcing mesh; 24. a tenon; 25. a groove; 26. grouting holes; 27. an anchor groove; 28. a slurry flow channel groove; 3. roadbed; 4. a hanging ring; 5. arc bolts; 6. a splice groove; 61. a longitudinal splice groove; 62. a transverse splice groove; 7. an anchor frame; 71. positioning columns; 8. and (5) anchoring the nails.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the assembled composite pavement structure shown in fig. 1-4, paving and splicing unit precast slabs 2 on a roadbed 3 to form a pavement main body, wherein the long sides of the unit precast slabs 2 are parallel to the driving direction during splicing, and after splicing, modified asphalt is spread on the pavement main body to serve as an adhesive layer for adhering an asphalt concrete layer 1 positioned on an upper surface layer as shown in fig. 4;

the width of the unit precast slab 2 is 300cm-450cm, the length-width ratio is 1-1.35, the thickness is 20-30cm, strip-shaped grooves are formed in the surfaces of the unit precast slab 2, the groove width is 4mm, the groove depth is 4mm, the clear distance between the grooves is 20mm, the connection area with the asphalt concrete layer 1 on the upper surface layer is increased, tenons 24 are arranged on two adjacent side end faces of the unit precast slab 2, matched grooves 25 are arranged on the other adjacent side end faces, the tenons 24 and the grooves 25 are spliced to form a pavement main body, the equipment matched size of the thicknesses of the tenons 24 and the widths of the grooves 25 is 5cm, when two adjacent unit precast slabs 2 are spliced through the tenons 24 and the grooves 25, transverse splicing grooves 62 and longitudinal splicing grooves 61 are reserved between the side end faces of the tenons 24 and the grooves 25 respectively, and the groove widths of the transverse splicing grooves 62 and the longitudinal splicing grooves 61 are 4mm, and the unit precast slabs 2 are prevented from being extruded mutually during thermal expansion and cold contraction; as shown in fig. 1 and 3, four side end faces of the unit precast slab 2 are all provided with a plurality of semi-arc connecting holes 212 penetrating from the side end face where the semi-arc connecting holes 212 are located to the upper plate face of the unit precast slab 2, the semi-arc connecting holes 212 are respectively located on the tenon 24 face of the side end face and the bottom face of the groove 25, the diameter of each semi-arc connecting hole 212 is 2.5cm, the distance between two adjacent semi-arc connecting holes 212 located on the long side end face is 40-80cm, the distance between the outermost semi-arc connecting holes 212 located on each long side end face is 50cm from the nearest wide side line, the distance between two adjacent semi-arc connecting holes 212 located on the wide side end face is 30cm, and when the two adjacent semi-arc connecting holes 212 are jointed and spliced, the ends of the two opposite semi-arc connecting holes 212 are connected in series to form an arc connecting hole capable of being used for penetrating through an arc bolt 5, a triangular pyramid 213 located at the other end of the semi-arc connecting hole 212 is further arranged on the upper plate face, the two end portions of the arc bolt 5 are respectively perpendicular to the triangular pyramid 213 and extend out of a triangular pyramid 213 or a triangular pyramid nut is capable of being screwed into a small conical surface of the tool, and the tool can be screwed into the triangular pyramid nut to be prevented from being deformed, and the end portion of the tool can be screwed into a small conical surface of the tool is deformed, and the tool can be deformed, and deformed.

As a further technical scheme, the unit precast slab 2 comprises an upper fiber concrete layer 21 and a lower cement concrete layer 22, wherein the fiber concrete layer 21 accounts for one third of the total thickness of the unit precast slab 2, the fiber concrete layer 21 is subjected to upper load and tensile stress in all directions transmitted by a plurality of arc bolts 5, the fiber concrete layer 21 can have anisotropy due to poor tensile capacity of concrete, local tensile capacity of the fiber concrete layer 21 is improved, the fiber can be made of steel fibers or imitated steel fibers or mixed fibers formed by the steel fibers and the imitated steel fibers, the fiber volume doping amount is 0.5% -1.5%, the semi-arc connecting holes 212 respectively penetrate through the fiber concrete layer 21 and the cement concrete layer 22, the reinforcing steel mesh 23 is laid in the cement concrete layer 22 in a flat manner, the reinforcing mesh 23 is located at a 1/4 thickness position from the bottom surface of the unit precast slab 2, and the upper part of the reinforcing mesh 23 is pressed and the lower part of the unit precast slab 2 is pulled when the unit precast slab 2 is subjected to load.

As a further technical scheme, as shown in fig. 3, the bottom of the unit precast slab 2 is provided with a plurality of criss-cross slurry flow channel grooves 28, the slurry flow channel grooves 28 are in a semicircular groove structure with the diameter of 5cm, are communicated with a plurality of grouting holes 26 arranged on the upper slab surface, and are used for uniformly distributing the injected quick setting cement mortar on the bottom of the unit precast slab 2 so as to coagulate and connect the unit precast slab 2 and the roadbed 3.

As a further technical scheme, the concrete slab further comprises four hanging rings 4 which are pre-buried near four slab corners of the unit precast slab 2, wherein the hanging rings 4 are bent by adopting smooth steel bars with the diameter of 14mm to form an omega shape with the outer diameter of 50mm, the upper pull rings of the hanging rings 4 are exposed by hanging holes 211 arranged on the upper slab surface of the unit precast slab 2, the tops of the hanging rings are flush with or lower than the surface of the unit precast slab 2, the hanging holes 211 are 80mm in diameter and 50mm in depth, and the lower ends of the hanging rings 4 extend to the lower part of the cement concrete layer 22 and are connected with a steel bar net 23.

As a further technical scheme, in order to improve the connection strength between the unit precast slabs 2 and the roadbed 3, the upper plate surface of each unit precast slab 2 is provided with five grouting holes 26, one of the five grouting holes 26 is positioned in the middle of the upper plate surface, the other four grouting holes are respectively arranged near four plate corners of the upper plate surface, the upper plate surface is also provided with an 'X' -shaped anchoring groove 27 communicated with the five grouting holes 26, and an anchoring mechanism for rigidly connecting the unit precast slabs 2 and the roadbed 3 is arranged in the anchoring groove 27, so that the grouting holes 26 can be used for grouting and fixing the anchoring mechanism after grouting, the anchoring mechanism shown in fig. 2 comprises an 'X' -shaped anchoring frame 7 and anchoring nails 8, positioning posts 71 are arranged below the four end parts of the anchoring frame 7, the positioning posts 71 are inserted into the grouting holes 26 near the four plate corners, the anchoring frame 7 are embedded into the anchoring groove 27, the anchoring nails 8 are inserted into the grouting holes 26 in the middle of the upper plate surface from round holes in the middle of the anchoring frame 7, the lower ends of the anchoring nails are inserted into the roadbed 3, and the anchoring nails are inserted into the roadbed at the depth of 50 cm-60 cm-30 cm.

Before constructing and assembling a road, paving and leveling broken stone, coarse sand and silt on a road base 3, and constructing a road surface structure assembled by using the unit precast slabs 2, wherein the construction method comprises the following steps:

s1, mass production of unit precast slabs 2 in a factory is carried out, wherein a cement concrete layer 22 is provided with criss-cross reinforcement meshes 23, the reinforcement meshes 23 are connected with hanging rings 4 to pre-embed the hanging rings 4, structures such as semi-arc connecting holes 212, hanging holes 211, triangular pyramid grooves 213, pouring holes, slurry runner grooves 28 and the like are reserved during pouring, and the unit precast slabs 2 are transported to a construction site after being molded and maintained;

s2, hoisting rings 4 of the unit precast slabs 2 by using a crane, placing and splicing the unit precast slabs 2 in a mode of driving along the long edge of the unit precast slabs 2, inserting tenons 24 on the long edge of the unit precast slabs 2 into long-edge grooves 25 opposite to the adjacent unit precast slabs 2, inserting tenons 24 on the wide edge of the unit precast slabs 2 into wide-edge grooves 25 opposite to the adjacent unit precast slabs 2, and reserving a transverse splicing groove 62 and a longitudinal splicing groove 61 between the two adjacent unit precast slabs 2 during splicing;

s3, after splicing an intermediate plate group or roadside plate groups, ensuring that no warpage, unevenness, skew and the like are caused, rigidly connecting the intermediate completely-limited unit precast plates 2, positioning the intermediate plate group or the roadside plate groups by using the intermediate unit precast plates 2, wherein the intermediate plate group refers to one intermediate unit precast plate 2 and four surrounding unit precast plates 2, the roadside plate group refers to one intermediate unit precast plate 2 and two unit precast plates 2 adjacent to two wide sides of the intermediate unit precast plate 2, connecting all intermediate plate groups in series in the connecting mode, rigidly connecting, namely sequentially penetrating arc-shaped bolts 5 in arc-shaped connecting holes, rigidly connecting the adjacent two unit precast plates 2 in series, and screwing nuts of a tool extending into two ends of the fixed arc-shaped bolts 5 from triangular grooves 213;

s4, after the assembly of a road section is completed, the triangular pyramid groove 213 of the road section is blocked and smoothed by fine stone concrete, the transverse splicing groove 62 and the longitudinal splicing groove 61 of the upper plate surface are filled by joint compound of silicone, polyurethane and modified asphalt, quick setting cement mortar is injected through the grouting holes 26 and uniformly spread to the bottom of the whole unit precast slab 2 through the slurry runner groove 28, and the bottom of the unit precast slab 2 is connected with the roadbed 3;

s4a, anchoring the unit precast slab 2, standing for one hour after grouting of grouting holes 26 is completed, inserting positioning columns 71 of an anchor frame 7 into four grouting holes 26 of slab corners until the anchor frame 7 falls into an anchor groove 27, inserting an anchor nail 8 from a round hole in the middle of the anchor frame 7, penetrating the grouting holes 26 in the middle of the unit precast slab 2 by the anchor nail 8, hammering the upper end of the anchor nail 8 to enable the lower end of the anchor nail 8 to be inserted into a roadbed 3 until the end of the anchor nail completely clamps the anchor frame 7, connecting the anchor frame 7 and the anchor nail 8 with the unit precast slab 2 into a whole after setting of quick setting cement mortar, and performing surface rust prevention treatment on the anchor frame 7 and the anchor nail 8;

s5, after finishing final setting of the quick setting cement mortar, filling the anchoring groove 27 with joint compound to complete the assembly of the pavement main body of one road section, paving the asphalt concrete layer 1 after the assembly of all road sections is completed, spreading modified asphalt on the surface of the unit precast slab 2 to serve as an adhesive layer, paving the asphalt concrete layer 1, and paving the asphalt concrete layer 1 with the paving thickness of 50-80 mm.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A fabricated composite pavement structure, comprising:

the road surface structure comprises a plurality of unit precast slabs laid on a road bed, tenons are arranged on the end surfaces of two adjacent sides of each unit precast slab, corresponding grooves are formed in the end surfaces of two adjacent sides of each unit precast slab, a road surface main body is formed by splicing the tenons and the grooves, the long sides of the unit precast slabs are parallel to the driving direction during splicing, the four side end surfaces of each unit precast slab are respectively provided with a half-arc connecting hole penetrating from the side end surface of each unit precast slab to the upper plate surface of each unit precast slab, after two adjacent unit precast slabs are attached and spliced, one end parts of the two opposite half-arc connecting holes are connected in series to form an arc connecting hole, and the upper plate surface is also provided with a triangular pyramid groove positioned at the other end part of the half-arc connecting hole;

the arc bolts are used for connecting two adjacent unit precast slabs and penetrate through the arc connecting holes, and two ends of each arc bolt extend into the triangular pyramid grooves from the semi-arc connecting holes of the two adjacent unit precast slabs respectively;

and the asphalt concrete layer is paved on the upper surface of the unit precast slab, and an adhesive layer is arranged between the asphalt concrete layer and the unit precast slab.

2. The fabricated composite pavement structure of claim 1, wherein: the width of the unit precast slab is 300cm-450cm, the length-width ratio is 1-1.35, and the thickness is 20-30cm.

3. The fabricated composite pavement structure of claim 2, wherein: the unit precast slab comprises an upper fiber concrete layer and a lower cement concrete layer, wherein a reinforcing mesh is laid in the cement concrete layer in a tiling mode, and the reinforcing mesh is located at a position 1/4 of the thickness of the bottom surface of the unit precast slab.

4. A fabricated composite pavement structure according to claim 3, wherein: the fiber concrete layer accounts for one third of the total thickness of the unit precast slab, and the semi-arc-shaped connecting holes respectively penetrate through the fiber concrete layer and the cement concrete layer.

5. The fabricated composite pavement structure of claim 4, wherein: the bottom of the unit precast slab is provided with a plurality of crisscross slurry flow channel grooves, and the slurry flow channel grooves are of a semicircular groove structure and are communicated with a plurality of grouting holes formed in the upper slab surface.

6. The fabricated composite pavement structure of claim 5, wherein: the concrete slab is characterized by further comprising four hanging rings which are embedded near four slab corners of the unit precast slab, wherein an upper pull ring of each hanging ring is exposed from a hanging hole formed in the upper slab surface of the unit precast slab, and the lower end of each hanging ring extends to the lower part of the cement concrete layer and is connected with the reinforcing mesh.

7. The fabricated composite pavement structure of claim 6, wherein: when the unit precast slabs are spliced, transverse splicing grooves and longitudinal splicing grooves are reserved between the opposite side end faces of two adjacent unit precast slabs respectively, and the groove widths of the transverse splicing grooves and the longitudinal splicing grooves are 4mm.

8. The fabricated composite pavement structure according to any of claims 5-7, wherein: five grouting holes are formed in the upper plate surface of each unit precast plate, one of the grouting holes is located in the middle of the upper plate surface, the other four grouting holes are respectively formed in the vicinity of four plate corners of the upper plate surface, an X-shaped anchoring groove which is communicated with the five grouting holes is formed in the upper plate surface, an anchoring mechanism which is rigidly connected with the unit precast plates and the roadbed is arranged in the anchoring groove, the anchoring mechanism comprises an X-shaped anchoring frame and anchoring nails, positioning columns are further arranged below the four end portions of the anchoring frame, the positioning columns are inserted into the grouting holes in the vicinity of the four plate corners, the anchoring frame is embedded in the anchoring groove, and the anchoring nails extend into the grouting holes in the middle of the upper plate surface from round holes in the middle of the anchoring frame and are inserted into the roadbed for anchoring.