CN219010844U - Prefabricated assembled concrete pavement slab with step end penetrating bolt connection - Google Patents

Abstract

The utility model provides a prefabricated assembled concrete pavement slab with a through bolt at the end of a step, wherein the concrete pavement slab is provided with at least one end which is the end of the step, a sleeve with a thorn nut is embedded at the end of the step, and the sleeve with the thorn nut is connected by a through bolt, so that the two concrete pavements are mutually connected; the prefabricated concrete pavement slab connected by the step end through bolts is simple to prefabricate, has low requirements on the foundation, is rapid to install, has a single structure, is different in specification and is convenient to transport and construct; the barbed nut sleeve is convenient to hoist and transport and is connected between boards, and the construction method of the prefabricated concrete pavement slab connected by adopting the through bolts at the step end is adopted, so that the construction method can be repeatedly used, the operation cost is greatly reduced, the resources are saved, the green circulation low-carbon development is promoted, and the ecological environment protection and treatment are enhanced.

Description

Prefabricated assembled concrete pavement slab with step end penetrating bolt connection

Technical Field

The utility model belongs to the technical field of prefabricated concrete pavement, and particularly relates to a prefabricated concrete pavement slab connected by a step end through bolt.

Background

In road maintenance and reconstruction projects with large traffic volume such as urban arterial roads, expressways and the like, the construction projects need to complete planning and construction of construction temporary roads at the early stage of the projects, the construction temporary roads generally adopt full cast-in-place concrete and steel plate paving forms, the actual service life of the construction temporary roads is less than 3 years, if the project construction temporary roads completely adopt cast-in-place concrete, most temporary roads are buried and abandoned after project completion delivery, the cost of operation at the current stage is increased, a certain degree of resource waste is caused, and in order to promote green circulation low-carbon development, ecological environment protection and treatment are enhanced, and the assembled building is greatly promoted in China in recent years.

At present, part of concrete prefabricated assembly type pavement boards have application examples, but have different defects. For example: prefabricated pavement boards in four-side tongue-and-groove shapes are arranged on the side surfaces of two adjacent sides of each pavement board along a central line, through-length convex grooves or concave grooves are formed, and the convex grooves of one pavement board are inserted into the concave grooves of the adjacent pavement boards to realize board-to-board connection. The advantage of this solution is that the surface is not damaged, the installation is fast and no surface retreatment is required. The defects are that the prefabrication of the component is complex, and the quality and the size of the convex groove and the concave groove are not easy to ensure; meanwhile, the foundation treatment requirement is high, the foundation strength is weak or the flatness is insufficient, so that the butt joint cannot be realized, and even the interface position is damaged. The tongue-and-groove bent bolt connection technology transforms the traditional pull rod into a bent bolt, and the plates are connected through back-screwed bolts. The disadvantage of this scheme is that the bolt hole is curved, and the preparation is more complicated, and two board side apertures align difficultly, cause curved bolt unable to pass the bolt hole easily. The micro-stress post-tensioning connection technology reserves a 50mm steel pipe or corrugated pipe at the 1/2 plate thickness, adopts a 16mm polished round steel bar with a screw cap to be screwed into the reserved steel sleeve, and performs post-pore grouting. The proposal has the advantages of no surface damage and simpler manufacture; the disadvantage is slow installation and grouting. A prefabricated concrete pavement slab adopts a dumbbell-shaped joint connecting member to replace a traditional pull rod, and grouting and trowelling are performed after leveling is installed. The advantage of this scheme is that installation construction speed is fast, and structural connection is firm. The defect is that the dumbbell-shaped member needs to be separately cast, and the surface of the dumbbell-shaped member has a plurality of rear grouting marks to influence the appearance. The connecting mode of the plain end pull rod (dowel bar) is to pre-embed the traditional pull rod during prefabrication, leave a hidden notch on the opposite side and directly install vertically during construction. The scheme has the advantages that the traditional pull rod form is adopted, and the process is mature. The defects are that the steel bars extend out of the plate, the transportation is troublesome, the steel bars are easy to warp and deform in the transportation process, the installation is impossible, the grouting of the notch is difficult to fill, the grouting of the notch at the top of the plate influences the appearance, the section is greatly weakened, and the manufacturing is complex. The concrete pavement slab with the four-side concave-convex mortise-tenon structure is characterized in that two concrete pavement slabs are directly in concave-convex mortise-tenon joint without a block connecting structure; the disadvantage is that dislocation easily occurs, and in order to adapt to different situations, up to 9 types are needed to be used in combination with each other, which brings about a lot of inconveniences for transportation and construction.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a prefabricated concrete pavement slab connected by a through bolt at the end of a step, wherein the concrete pavement slab is provided with at least one end which is the end of the step, a sleeve with a thorn nut is embedded in the end of the step, and the sleeve is connected by a through bolt, so that the two concrete pavements are mutually connected; the prefabricated concrete pavement slab connected by the step end through bolts is simple to prefabricate, has low requirements on the foundation, is rapid to install, has a single structure, is different in specification and is convenient to transport and construct; the barbed nut sleeve is convenient to hoist and transport and is connected between boards, and the construction method of the prefabricated concrete pavement slab connected by adopting the through bolts at the step end is adopted, so that the construction method can be repeatedly used, the operation cost is greatly reduced, the resources are saved, the green circulation low-carbon development is promoted, and the ecological environment protection and treatment are enhanced.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a prefabricated assembled concrete pavement slab with step end penetrating bolt connection is characterized in that: the concrete pavement slab comprises a concrete pavement slab body, a plurality of barbed nut sleeves and through long bolts matched with the barbed nut sleeves for use, wherein the barbed nut sleeves are assembled in the concrete pavement slab body;

the barbed nut sleeve comprises a plurality of thorn layers and a nut barrel, wherein an internal thread is arranged on the inner wall of the nut barrel, and a plurality of thorn layers are arranged on the outer wall of the nut barrel.

Preferably, one end of the concrete pavement slab is a step end, the other end of the concrete pavement slab is a flush end or a step end, and a plurality of barbed nut sleeves are arranged in the step end.

Preferably, the thorn layer comprises a plurality of thorns, and the thorns form a 'rice' -shaped structure on the outer wall of the nut cylinder.

Preferably, the outer wall of the through long bolt is provided with a thread matched with the internal thread,

the top end is provided with a concave inner hexagon bolt head.

Preferably, the nut cylinder is made of steel.

Preferably, the thorn material is HRB400 grade ribbed steel bar.

The beneficial effects of the utility model are as follows:

(1) And the construction efficiency is high.

The assembled road installed by the concrete pavement slab reduces a plurality of links such as cast-in-situ and solidification, can greatly save the construction period, avoids long-time closed traffic and brings considerable social benefit.

(2) The standardization level is high.

The prefabricated concrete pavement slab connected by the step end through bolts can be produced in a large scale in a prefabricated field, is subjected to concentrated maintenance and scattered installation, is little in environmental impact and easy to control in quality, is produced in a customized way by an industrial factory, can be built rapidly, flexibly and orderly, is higher in industrialization and standardization degree, and is higher in quality.

(3) The environment is protected and the environment is protected.

The prefabricated concrete pavement slab connected by the step end through bolts has the advantages of reusability, quick repair and replacement, environmental protection, quick assembly and disassembly, cyclic utilization, turnover use in temporary road construction of a plurality of projects, great reduction of pollution caused by construction waste to the environment and maximization of economic benefit.

(4) And the water is recycled, so that the cost is saved.

In the maintenance and reconstruction of pavements with large traffic volume such as urban arterial roads and airport pavement, the utility model has the advantages that compared with the expensive rapid repair materials (such as rapid hardening cement) due to the requirements of short-seal rapid maintenance, no-navigation construction and the like, the prefabricated assembled concrete pavement slab with the step end connected by the through bolt adopts the conventional ordinary Portland cement and steel bars, and the repair cost is greatly reduced.

(5) And the influence of construction environment is reduced.

The prefabricated concrete pavement slab connected by the step end through bolt reduces the influence of a construction site on the environment, and also avoids the influence of severe weather such as strong wind, heavy rain and the like on the construction, and the prefabricated pavement and the green construction are realized by adopting modular design and prefabricated production on an assembled road, so that the prefabricated concrete pavement slab is a novel road construction process with the advantages of resource conservation and environmental friendliness.

Drawings

FIG. 1 is a sleeve view of a barbed nut in accordance with the present utility model;

FIG. 2 is a view of a through bolt of the present utility model;

FIG. 3 is a schematic view of an assembled concrete pavement slab of the present utility model;

FIG. 4 is a schematic view of an assembled pavement slab of the concrete pavement of the present utility model;

FIG. 5 is a schematic perspective view of a concrete pavement slab of the present utility model A1;

FIG. 6 is a schematic perspective view of an A2 concrete pavement slab of the present utility model;

FIG. 7 is a schematic perspective view of a B1 concrete pavement slab of the present utility model;

FIG. 8 is a schematic perspective view of a B2-type concrete pavement slab of the present utility model;

FIG. 9 is a schematic plan view of a bicycle roadway assembly in accordance with the present utility model;

FIG. 10 is a schematic plan view of a two-wheeled roadway according to the present utility model;

FIG. 11 is a side view of a concrete pavement slab splice of the present utility model;

FIG. 12 is a side view of a concrete pavement slab of the present utility model with one end flush with the end of the slab and the other end of the slab;

FIG. 13 is a side view of another concrete pavement slab of the present utility model having one end flush with the end of the slab and the other end of the slab step;

FIG. 14 is a side view of a concrete pavement slab of the present utility model with stepped ends at both ends;

FIG. 15 is a perspective view of a single lane pavement equipping panel of the present utility model;

FIG. 16 is a perspective view of a two-lane pavement equipping panel of the present utility model;

wherein: 1. a barbed nut sleeve; 101. thorns; 102. a nut cylinder 103; 2. a through bolt; 201. a thread is screwed; 202. concave socket head cap screw head.

Detailed Description

In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model is further described below with reference to the accompanying drawings and examples.

Examples

Referring to fig. 1-16, a prefabricated concrete pavement slab with through bolts at the step ends comprises a concrete pavement slab, a rubber water stop strip adhered to the side surface of the concrete pavement slab, a barbed nut sleeve 1 and a through bolt 2 matched with the barbed nut sleeve 1 for use;

one end of the concrete pavement slab is a step end, the other end of the concrete pavement slab is a flush end or a step end, one end of the concrete pavement slab is of a flush end structure, and the other end of the concrete pavement slab is of a step end, and the concrete pavement slab is used for paving the road edge; the concrete pavement slab with the step ends at the two ends is used for paving other road sections outside the edge;

the step end of the concrete pavement slab is pre-embedded with a plurality of thorn-carrying nut sleeves 1, each thorn-carrying nut sleeve 1 comprises a plurality of thorn layers and a nut barrel 102, the thorn layers are arranged at positions 50mm away from the upper end and the lower end of the outer wall of the nut barrel 102, the distance between each thorn layer is 50mm, the inner wall of the nut barrel 102 is also provided with internal threads 103, each thorn layer comprises a plurality of thorns 101, preferably 8 thorns, the thorns 101 are welded on the outer wall of the nut barrel 102 to form a 'rice' -shaped structure, preferably two groups of 'rice' -shaped structures are welded, the included angle between the two thorns 101 is 45 degrees during welding, the thorn layers are used for increasing the binding force between the thorn-carrying nut sleeve 1 and the concrete pavement slab, and preventing the binding force between the through nut sleeve and the concrete pavement slab from being insufficient in the lifting transportation process, and the through nut sleeve is pulled out from the concrete pavement slab;

the nut cylinder 102 is a steel cylinder, the inner diameter is 48mm, the outer diameter is 60mm, and the height is 150mm; the nominal diameter of the internal thread 103 is 48mm, the thread pitch is 5, the thorn 101 is HRB400 ribbed steel bar, the diameter is 20mm, the length is 100mm,

the outer wall of the through long bolt 2 is provided with a thread 201 matched with the internal thread 103, the top end of the through long bolt is provided with a concave inner hexagonal bolt head 202, and the concave inner hexagonal bolt head 202 is convenient for a worker to screw in the nut cylinder 102 by using a corresponding tool;

the scheme is applied as follows:

in actual use, the step ends of the two concrete pavement slabs can be lapped, the centers of the nut barrels 102 in the barbed nut sleeves 1 pre-buried in the concrete pavement slabs are aligned, and then the concrete pavement slabs are connected with each other by screwing the through long bolts 2 into the concave inner hexagon bolt heads 202 by using tools.

The actual application scene of the utility model is as follows:

the concrete pavement slab is divided into A1 type, A2 type, B1 type and B2 type, and the concrete pavement slab of various types has different structures and specifications, and aims to realize staggered connection during construction so as to avoid forming transverse through seams; the A1 type concrete pavement slab has the specification that: one long side is a step end, the other three sides are flush ends, the length is 4m, the width of the lower step is 2m, the width of the step is 0.3m, the width of the upper step is 1.7m, the total width is 2m, and the total height is 0.3m; the A2 type concrete pavement slab has the specification that: two short sides are flush ends, the remaining two long sides are step ends, the length is 4m, the width of a lower step is 2m, the width of a step is 0.3m, the width of an upper step is 2m, the total width is 2.3m, and the total height is 0.3m; the two opposite side step ends are centrosymmetric with the long axis; the specification of the B1 type concrete pavement slab is as follows: one side is a step end, three sides are flush ends, the length is 2m, the width of the lower step is 2m, the width of the step is 0.3m, the width of the upper step is 1.7m, the total width is 2m, and the total height is 0.3m; the specification of the B2 type concrete pavement slab is as follows: two sides are flush ends, the remaining two long sides are step ends, the length is 2m, the width of the lower step is 2m, the width of the step is 0.3m, the width of the upper step is 2m, the total width is 2.3m, and the total height is 0.3m; the two opposite side step ends are centrosymmetric with the long axis.

The concrete construction method comprises the following steps:

s1, hanging a concrete pavement slab, aligning the flush end of the concrete pavement slab with the edge of a road, and pointing the step end to one side needing lapping.

S2, hanging the adjacent concrete pavement slab, enabling the step end of the adjacent concrete pavement slab to be connected to the step end of the concrete pavement slab which is installed in the step S1, and adjusting the position of the adjacent concrete pavement slab to enable the nut cylinder 102 to be aligned with the center of the nut cylinder 102 on the step end of the concrete pavement slab which is installed in the step S1.

S3, screwing the through bolts 2 into nut barrels 102 in the step ends of the concrete pavement slab which is installed in the step S1 and the step S2, and connecting two adjacent concrete pavement slabs with each other, and the like until the whole pavement is paved.

S4, the A1 type, the A2 type, the B1 type and the B2 type of the concrete pavement slab 1 are installed in the same way.

In order to accommodate roads of different widths, the following embodiments are presented:

example 1

The single-lane pavement is composed of 2 rows of concrete pavement boards 1 in the width direction, the total width is 3.7m, and the length is that the whole pavement is paved along the driving direction;

the first row is divided into the following modes along the driving direction: type a1→type a1→ … … →type A1;

the second row is divided into the following modes along the driving direction: type B1→type a1→type … … →type a1→type B1.

Example 1

4 rows of the double-lane road surfaces are arranged in the width direction, the total width is 7.7m, and the length of the double-lane road surfaces is fully paved with the whole road surface along the driving direction;

the first row is divided into the following modes along the driving direction: type a1→type a1→ … … →type A1;

the second row is divided into the following modes along the driving direction: type B2→type a2→ … … →type a2→type B2;

the third row is divided into the following modes along the driving direction: type a2→type a2→ … … →type A2;

the fourth column is grouped in the driving direction: type B1→type a1→ … … →type a1→type B1.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (6)

1. A prefabricated assembled concrete pavement slab with step end penetrating bolt connection is characterized in that: the concrete pavement slab comprises a concrete pavement slab body, a plurality of barbed nut sleeves (1) and through long bolts (2) matched with the barbed nut sleeves (1), wherein the barbed nut sleeves (1) are assembled in the concrete pavement slab body;

the barbed nut sleeve (1) comprises a plurality of thorn layers and a nut barrel (102), wherein internal threads (103) are arranged on the inner wall of the nut barrel (102), and a plurality of thorn layers are arranged on the outer wall of the nut barrel (102).

2. The prefabricated concrete pavement slab with through-bolt connection of step ends according to claim 1, wherein: one end of the concrete pavement slab is a step end, the other end of the concrete pavement slab is a flush end or a step end, and a plurality of barbed nut sleeves (1) are arranged in the step end.

3. A prefabricated concrete pavement slab with through-bolt connection of step ends according to claim 2, characterized in that: the thorn layer comprises a plurality of thorns (101), and the thorns (101) form a 'rice' -shaped structure on the outer wall of the nut cylinder (102).

4. The prefabricated concrete pavement slab with through-bolt connection of step ends according to claim 1, wherein: the outer wall of the through long bolt (2) is provided with a threaded screw thread (201) matched with the internal thread (103), and the top end of the through long bolt is provided with a concave inner hexagon bolt head (202).

5. The prefabricated concrete pavement slab with through-bolt connection of step ends according to claim 1, wherein: the nut cylinder (102) is made of steel.

6. A prefabricated concrete pavement slab with through-bolt connection at the end of a step according to claim 3, wherein: the thorn (101) is made of HRB 400-level ribbed steel bars.

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