CN212895745U

CN212895745U - Assembled prestressing force high-strength concrete road surface

Info

Publication number: CN212895745U
Application number: CN202020847160.0U
Authority: CN
Inventors: 张立乾; 刘占卿; 陈红; 李玉良; 闫晶; 李兵; 吴星; 孟良; 王新波; 冯中华; 贾佳; 王纳
Original assignee: 63921 Troops of PLA
Current assignee: 63921 Troops of PLA
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-04-06
Anticipated expiration: 2030-05-20

Abstract

The utility model discloses an assembled prestressed high-strength concrete pavement, which comprises more than two single boards, prestressed tendons, prestressed anchors and assembling parts; the single plate is formed by high-strength concrete, the thickness of the single plate is 6-10 cm, transverse and longitudinal crossed prestressed tendon ducts are arranged in the single plate, and bent ducts are arranged at the crossed points; the two or more single plates are mutually spliced along the transverse direction and/or the longitudinal direction, the prestressed tendons are distributed along the central line of the plate body of the single plates, corresponding prestressed tendon pore channels are inserted, the prestressed tendons are in a transverse and longitudinal cross state in space, and the interval between two transversely or longitudinally adjacent prestressed tendons is 1-3 m; the prestressed tendons are anchored and fixed by a prestressed anchorage device after extending out of the end single plate to form an assembly splicing unit; more than one assembling and splicing unit is connected through an assembling part to form a pavement. The utility model discloses attenuate road deck thickness and can realize that the scene is assembled fast.

Description

Assembled prestressing force high-strength concrete road surface

Technical Field

The utility model relates to a concrete pavement structure's technical field, concretely relates to assembled prestressing force high-strength concrete pavement.

Background

Concrete pavement refers to a pavement that is surfaced with a slab of cement concrete. The concrete pavement structure is a pavement structure which is formed by taking a concrete slab as a surface course and arranging a base course and a cushion course under the concrete slab, and is also called as a rigid pavement. The fabricated concrete pavement is a pavement which is formed with prefabricated slabs in a factory and then paved at a construction site, and has the defects that the pavement is generally thick and heavy, is difficult to connect and cannot be widely used; the prestressed tendons of the oblique prestressed concrete pavement are obliquely arranged, so that the weaving effect is poor, the prestressed loss is large, the construction process is complex, the construction period is long, and the concrete pavement slab of the pavement is thick and heavy, so that the difficulty is increased for on-site pavement.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an assembled prestressing force high-strength concrete road surface has attenuate road deck thickness and can realize assembling fast on-the-spot.

The utility model adopts the following technical scheme:

an assembled prestressed high-strength concrete pavement comprises more than two single boards, prestressed tendons, prestressed anchors and assembling parts;

the single plate is formed by high-strength concrete, the thickness of the single plate is 6-10 cm, transverse and longitudinal crossed prestressed tendon ducts are arranged in the single plate, and bent ducts are arranged at the crossed points; the two or more single plates are mutually spliced along the transverse direction and/or the longitudinal direction, the prestressed tendons are distributed along the central line of the plate body of the single plates, corresponding prestressed tendon pore channels are inserted, the prestressed tendons are in a transverse and longitudinal cross state in space, and the interval between two transversely or longitudinally adjacent prestressed tendons is 1-3 m; the prestressed tendons are anchored and fixed by a prestressed anchorage device after extending out of the end single plate to form an assembly splicing unit; more than one assembling and splicing unit is connected through an assembling part to form a pavement.

Furthermore, the prestressed tendons adopt unbonded prestressed steel strands.

Furthermore, the prestressed anchorage device adopts a clamping piece anchorage device, and an anti-corrosion sleeve is sleeved outside the prestressed anchorage device.

Furthermore, the single boards are spliced through concave-convex tongues and grooves.

Has the advantages that:

the utility model discloses combine prestressing force, assembled and high-strength concrete three, can make the super thinization of assembled prestressing force high-strength concrete road surface course, make the light-duty change of road surface component, do not need the cast-in-place to make the site assembly operation quick more, convenient. The prestressed concrete pavement applies a pre-compressive stress on the working section in advance so as to improve the bearing capacity of a concrete structure; the prefabricated panel plates in factories are transported to a construction site for assembly on the fabricated pavement, so that the aims of quick assembly and construction and quick traffic opening are fulfilled, and the damage is convenient for renovation and replacement; the high-strength concrete has good compression resistance and bending resistance toughness; the prestress provides compressive stress storage for the road slabs, reduces the thickness of the slabs, tightly connects the assembled road slabs together, avoids separation between plate bodies, has strong integrity, and provides necessary normal positive pressure compressive stress for realizing vertical shear load transfer of rabbet joints between the road slabs.

Drawings

FIG. 1 is a plan view of 20 single boards according to an embodiment of the present invention;

FIG. 2 is a tongue and groove riser arrangement;

FIG. 3 is a schematic drawing of a prestressed reinforcement installation elevation;

wherein, 1-end plate, 2-middle plate, 3-longitudinal prestressed tendon, 4-transverse prestressed tendon and 5-prestressed anchorage device.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings by way of examples.

The utility model provides an assembled prestressing force high strength concrete road surface, including veneer, prestressing tendons, prestressed anchorage utensil 5 and assembly part more than two.

The veneer is made of high-strength concrete, the high-strength concrete is active powder concrete with good compression resistance and bending resistance toughness and the compression strength of more than 80MPa, the veneer is rectangular, can be rectangular or square, the thickness of the veneer is 6-10 cm, transverse and longitudinal cross prestressed tendon ducts are arranged in the veneer, and a bending duct is arranged at the cross point; the more than two single boards can be transversely spliced and assembled along a road and can also be spliced and assembled along a longitudinal board of the road, the prestressed tendons are distributed along the central lines of the single board bodies, corresponding prestressed tendon pore channels are inserted, the prestressed tendons are in a transverse and longitudinal cross state in the space, and the interval between two transversely or longitudinally adjacent prestressed tendons is 1-3 m; the prestressed tendons are anchored and fixed by a prestressed anchorage device 5 after extending out of the end surface of the end veneer, the veneer penetrated by the transverse and longitudinal prestressing force is assembled to form an assembly splicing unit, and the whole assembly splicing unit is of an axisymmetric structure; more than one assembly splicing unit is connected through an assembly part to form a pavement, and joints are filled by pouring polyurethane.

In the embodiment, the transverse length of the veneer body is 3m, two longitudinal prestressing forces are arranged, and the distance between the longitudinal prestressing forces is 1.5 m; the longitudinal length of the veneer is 1m, a transverse prestress is arranged, and the thickness is 0.1 m. The prestressed tendon pore channels are accurately reserved when the single plate is prefabricated, and the longitudinal prestressed tendons 3 and the transverse prestressed tendons 4 are crossed in a plane, so that the bent pore channels can be arranged at the crossed points of the plane, and the transverse prestressed tendons and the longitudinal prestressed tendons can be mutually crossed without generating overlarge deviation on the central line of the plate.

The single plate is divided into an end plate 1 and a middle plate 2, and the outer side of the end plate 1 is not provided with a tongue-and-groove so as to provide a prestressed rib tensioning anchoring side wall; the middle plate 2 is a plate between the end plates 1, and the contact surfaces are all provided with tongue-and-groove joints. As shown in FIG. 1, a total of 20 single boards, 10 single boards in the longitudinal direction, two single boards in the transverse direction, and 20 single boards in the transverse direction are spliced with each other to form an assembled splicing unit with a length of 10m, a width of 6m, and an area of 60m². As shown in fig. 2, the tongue-and-groove joint is divided into a concave tongue-and-groove and a convex tongue-and-groove, and the concave and the convex are engaged to form a pair of tongue-and-groove joints.

The prestressed tendon is an unbonded prestressed steel strand with 1860 grade diameter of 15.24 mm. The prestressed tendons are distributed along the central line of the veneer body, corresponding prestressed tendon pore channels are inserted, and the prestressed tendons are in a transverse and longitudinal cross state in space, wherein the interval between every two adjacent longitudinal prestressed tendons 3 is 1.5m, and the interval between every two adjacent transverse prestressed tendons 4 is 1 m. The center of gravity of the transverse and longitudinal prestressed tendons is coincident with the center of the single plate. The prestressed tendons are distributed along the center of the plate body, so that the prestressed tendons generate axial normal stress on the plate body, and the phenomenon that distributed force, concentrated force or bending moment perpendicular to the plate body is generated is avoided, and the combination between the plate body and the lower base layer can be influenced due to the action of the force.

As shown in fig. 3, the prestressed tendons are fixed by the prestressed anchorage devices 5 after extending out of the single plates to form the assembled splicing unit. The prestressed anchorage device 5 adopts a clamping piece anchorage device and is externally sleeved with an anti-corrosion sleeve.

And (3) carrying out stress analysis on the assembled prestressed high-strength concrete pavement structure by adopting abaqus software simulation. And (3) establishing an assembly splicing unit model, wherein the physical and mechanical parameters of the model are shown in the table 1. The size of the model is as follows: the veneer is 3mx1m, the thickness is 0.1m, and 20 veneers in total form a 10mx6m splicing unit. The base layer size was 12mx8m, height 0.6 m.

TABLE 1 physical and mechanical index table

And calculating the mechanical deformation behavior of the assembly splicing unit under the action of four combined forces of applied gravity field, prestress, wheel load pressure and upper suction load, as shown in table 2.

TABLE 2 comparison table of mechanical deformation behavior of plate under action of four working conditions

Therefore, the stress deformation of the assembled prestressed high-strength concrete pavement structure meets the requirement, the prestress provides sufficient compressive stress storage for the pavement slab, and the tensile stress can not occur under the action of wheel load; meanwhile, the assembled road slabs are tightly connected together, so that the separation between the plate bodies is avoided, and the integrity is enhanced; the rabbet joints between the road panels are effective in realizing vertical shear load transmission, and the stress transmission from the wheel load compression area to the adjacent plates can be realized through the rabbet joints; the assembly splicing unit has strong integrity and has advantages in the aspect of resisting suction load; the thickness of the plate body is 100mm, tensile stress does not occur yet under the action of wheel load, and deformation is small.

In summary, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. 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

1. An assembled prestressed high-strength concrete pavement is characterized by comprising more than two single plates, prestressed tendons, prestressed anchors and assembling parts;

2. The fabricated prestressed high-strength concrete pavement of claim 1, wherein said prestressed tendons are unbonded prestressed steel strands.

3. The fabricated prestressed high-strength concrete pavement as claimed in claim 1, wherein said prestressed anchorage means is a clip anchorage means, and is covered with an anticorrosion cover.

4. The fabricated prestressed high-strength concrete pavement as claimed in claim 1, wherein said single slabs are spliced together by means of concave-convex tongue-and-groove joints.