CN214193988U

CN214193988U - Prefabricated assembled concrete pavement

Info

Publication number: CN214193988U
Application number: CN202022602553.8U
Authority: CN
Inventors: 朱勇强; 刘志华; 丘伟强; 李连生; 廖朝辉; 李建勋; 陈小丽
Original assignee: Guangdong Guanyue Highway and Bridge Co Ltd
Current assignee: Guangdong Guanyue Highway and Bridge Co Ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2021-09-14
Anticipated expiration: 2030-11-10

Abstract

The utility model relates to a prefabricated assembled concrete road surface. The prefabricated assembly type concrete pavement comprises a plurality of concrete prefabricated panels laid on a leveling layer, the top surfaces of the concrete prefabricated panels are recessed at four corners to form a connecting platform, and the connecting platform is provided with a hoisting device and a leveling device; a dowel bar is embedded in one side of the concrete precast panel, and a dowel bar groove is formed in the other opposite side of the concrete precast panel; four adjacent corners of four adjacent concrete prefabricated panels jointly enclose a grouting hole; the prefabricated assembly type concrete pavement also comprises a grouting material filling part which is formed by grouting the grouting material between the concrete prefabricated panel and the leveling layer through a grouting hole and a pulp flow channel formed at the bottom surface of the concrete prefabricated panel and in a force transmission rod groove for accommodating a force transmission rod; and a concrete seal part formed by pouring the concrete seal part on the connecting platform. The precast concrete pavement has good flatness of the precast concrete panels and is firmly connected with each other.

Description

Prefabricated assembled concrete pavement

Technical Field

The utility model relates to a road surface lays technical field, especially relates to a prefabricated assembled concrete road surface.

Background

At present, the traditional concrete road mainly adopts a cast-in-place concrete construction process, and needs on-site formwork erecting, reinforcing steel bar binding, concrete pouring, pavement maintenance and the like. The construction process has low efficiency, needs to consume a large amount of human resources, has long construction period and seriously delays the open traffic time.

As a novel pavement form, compared with the traditional cast-in-place concrete pavement, the fabricated pavement is short in time consumption in site construction, simple in construction technology, capable of bearing heavy load, and capable of being put into use quickly after construction, and greatly relieving traffic jam problems caused by construction. But the present precast concrete panel has the technical problems of poor flatness and loose connection between panels.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention has been made to provide a precast assembled concrete pavement that overcomes or at least partially solves the above-mentioned problems.

The prefabricated assembly type concrete pavement comprises a plurality of concrete prefabricated panels which are generally rectangular and laid on a leveling layer, wherein the top surfaces of the concrete prefabricated panels are sunken at four corners to form a connecting platform, and the connecting platform is provided with a hoisting device which is matched with hoisting equipment to hoist the concrete prefabricated panels and a leveling device which is used for adjusting the flatness of the concrete prefabricated panels; a dowel bar is embedded in one side of the concrete precast panel, and a dowel bar groove capable of accommodating the extending section of the dowel bar butted with the concrete precast panel is arranged on the other opposite side of the concrete precast panel; four adjacent corners of four adjacent concrete prefabricated panels jointly enclose a grouting hole;

the prefabricated assembly type concrete pavement also comprises a grouting material filling part which is formed by grouting the grouting material between the concrete prefabricated panel and the leveling layer through a grouting hole and a pulp flow channel formed at the bottom surface of the concrete prefabricated panel and in a force transmission rod groove for accommodating a force transmission rod; and a concrete seal part formed by pouring the concrete seal part on the connecting platform.

Optionally, the hoisting device is a hoisting ring pre-buried in the connecting platform.

Optionally, the prefabricated assembled concrete pavement further comprises a hoop rib ring sleeved on the outer side of the four adjacent hanging rings and used for fixing the four adjacent hanging rings.

Optionally, the leveling device comprises a leveling sleeve and a leveling screw, and an internal thread matched with the external thread of the leveling screw is formed on the inner side of the leveling sleeve; the bottom surface of the concrete prefabricated panel is located in the area corresponding to the lower end of the leveling sleeve, a space for containing a base plate arranged on a leveling layer is formed in the area corresponding to the lower end of the leveling sleeve, and the leveling screw rod can support against the base plate.

Optionally, a double-layer steel bar mesh is arranged in the concrete prefabricated panel, and the leveling sleeve is welded and fixed with the steel bars.

Optionally, the cross section of the pulp flow channel is triangular, and the pulp flow channel includes two first pulp flow channels communicated with the grouting hole, a plurality of second pulp flow channels arranged between the two first pulp flow channels and parallel to the first pulp flow channels, and a plurality of third pulp flow channels perpendicular to the first pulp flow channels and communicated with the first pulp flow channels and the second pulp flow channels.

Optionally, the corners of the precast concrete panel are chamfered in a height direction.

The embodiment of the utility model provides a prefabricated assembled concrete pavement adopts the prefabricated panel of concrete to lay the road surface, and its site operation weak point consuming time, construction technique are simple, can bear the heavy load, and the traffic jam problem brought because of the construction is alleviated greatly to the quick use that comes into operation after the construction.

The precast concrete panel can be precast in a factory, has high precision, can realize standardized production, and can recycle construction waste generated in the precast process so as to reduce the pollution to the environment.

The leveling device can be used for adjusting the evenness of the concrete prefabricated panel, so that the evenness of the concrete prefabricated panel is good. The adjacent concrete prefabricated panels can be connected through the concrete sealing part, the dowel bar and the like, and the concrete prefabricated panels are firmly connected.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic structural view of an exemplary embodiment of a prefabricated concrete pavement according to the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a top view of the precast concrete panel of FIG. 1;

fig. 4 is a left side view of the concrete precast panel of fig. 1.

Description of reference numerals: 1. prefabricating a panel by concrete; 2. connecting the platform; 3. a hoisting ring; 4. leveling sleeves; 5. leveling screw rods; 6. a dowel bar; 7. a transfer bar slot; 8. a stirrup ring; 9. grouting holes; 10. a first slurry channel; 11. a second flow channel; 12. a third slurry channel; 13. concrete seal portion.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below are exemplary and are intended to be illustrative of the present invention, but not limiting thereof, and those skilled in the art will appreciate that various changes, modifications, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims and equivalents thereof.

The terms "central," "longitudinal," "transverse," "length," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like, referred to or as may be referred to in the description of the invention, are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, the terms "comprises," "comprising," and any variations thereof, are intended to cover non-exclusive inclusions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between 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 precast assembled concrete pavement according to an embodiment of the present invention is described below with reference to the accompanying drawings.

Referring to fig. 1 to 4, according to the utility model discloses a prefabricated assembled concrete pavement, it is including laying a plurality of precast concrete panels 1 on the leveling layer, precast concrete panel 1 is the rectangle in general. The top surface of the concrete prefabricated panel 1 is recessed at four corners to form a connecting platform 2, and the connecting platform 2 is provided with a hoisting device and is used for being matched with hoisting equipment to hoist the concrete prefabricated panel 1. In this embodiment, the hoisting device is a hoisting ring 3 pre-buried in the connecting platform 2, and after hoisting equipment, such as a hoisting hook of a crane, locks the hoisting ring 3, the concrete prefabricated panel 1 can be hoisted. It should be understood that other suitable configurations for the lifting device may be used.

Connecting platform 2 still is equipped with levelling device, through operating levelling device, can adjust the roughness that precast concrete panel 1 laid. In this embodiment, the leveling device includes a leveling sleeve 4 and a leveling screw 5, an internal thread matched with the external thread of the leveling screw 5 is formed on the inner side of the leveling sleeve 4, when the leveling screw 5 is rotated, the leveling screw 5 can be abutted against the leveling layer, and a gap between the position of the precast concrete panel 1 and the leveling layer is adjusted, so that the paving evenness of the precast concrete panel 1 is adjusted. For example, the leveling screw 5 is rotated clockwise, the leveling screw 5 extends out of the lower end of the leveling sleeve 4 and abuts against the leveling layer, the clockwise rotation is continued to increase the gap between the position of the precast concrete panel 1 and the leveling layer, and the counterclockwise rotation is continued to decrease the gap between the position of the precast concrete panel 1 and the leveling layer, so that the paving flatness of the precast concrete panel 1 is adjusted.

In order to avoid the leveling screw rods 5 from sinking into the leveling layer, a base plate, such as a steel base plate, is arranged on the leveling layer corresponding to the lower end of the leveling sleeve 4, and when the leveling device is used for adjusting the laying flatness of the concrete prefabricated panel 1, the corresponding leveling screw rods 5 are directly abutted against the base plate. The bottom surface of the concrete prefabricated panel 1 is positioned in the corresponding area of the lower end of the leveling sleeve 4, and the area is recessed inwards to form a space for accommodating the backing plate, and the space is preferably connected with the edge of the side wall of the concrete prefabricated panel 1, so that the position of the backing plate can be conveniently adjusted in the construction process.

Dowel bars 6 are embedded in one side of the precast concrete panel 1, and dowel bar grooves 7 capable of accommodating extending sections of the dowel bars 6 of the precast concrete panel 1 are arranged on the other opposite side of the precast concrete panel. Dowel bar 6 can not only play the transmission load effect, also is favorable to leveling to concrete prefabricated panel 1 simultaneously.

In this embodiment, a double-layer steel bar net is arranged in the concrete prefabricated panel 1. The lower half part of the hoisting ring 3 is arranged above the lower layer reinforcing mesh and is firmly bound with the lower layer reinforcing mesh. The leveling sleeve 4 is welded and fixed with the corner steel bar. And the embedded section of the dowel bar 6 is firmly bound with the reinforcing mesh. The prefabricated assembly type concrete pavement further comprises stirrup rings 8 which are sleeved on the outer sides of the four adjacent lifting rings 3 and used for fixing the four adjacent lifting rings 3.

The four adjacent corners of the four adjacent precast concrete panels 1 together form grouting holes 9, and in this embodiment, the corners of the precast concrete panels 1 are chamfered in the height direction, so that the four adjacent corners together form grouting holes 9 with rectangular cross sections. The prefabricated assembly type concrete pavement further comprises a grouting material filling part which is formed by grouting a pulp flowing channel formed on the bottom surface of the concrete prefabricated panel 1 between the concrete prefabricated panel 1 and the leveling layer through a grouting hole 9 and in a force transmission rod groove 7 which already contains the force transmission rod 6. The grouting material poured between the concrete prefabricated panel 1 and the leveling layer can eliminate possible small-range void between the concrete prefabricated panel 1 and the leveling layer, and avoid the defects of corner breaking, plate breaking and the like caused by void and influence on the service life of a road.

In this embodiment, the cross section of the pulp flow channel is triangular, and the pulp flow channel includes two first pulp flow channels 10 communicated with the grouting hole 9, a plurality of second pulp flow channels 11 arranged between the two first pulp flow channels 10 and parallel to the first pulp flow channels 10, and a plurality of third pulp flow channels 12 perpendicular to the first pulp flow channels 10 and communicated with the first pulp flow channels 10 and the second pulp flow channels 11.

The prefabricated assembly type concrete pavement further comprises a concrete sealing part 13 formed by pouring on the connecting platform 2, the top surface of the concrete sealing part 13 is flush with the top surface of the adjacent concrete prefabricated panel 1, on one hand, the space above the connecting platform 2 is filled, so that the pavement is flat, and on the other hand, the prefabricated assembly type concrete pavement plays a role in load transfer.

The prefabricated assembly type concrete pavement further comprises backing strips pressed into gaps among the concrete prefabricated panels 1 and joint filling materials poured into gaps above the backing strips. The joint filling has the functions of sealing, water proofing and sand prevention stone embedding.

The embodiment of the utility model provides a prefabricated assembled concrete road surface, its construction method includes following step:

and S1, prefabricating the concrete prefabricated panel.

The precast concrete panel includes the following substeps:

s101, binding a reinforcing mesh, fixing a lifting ring and leveling sleeves.

The lower half part of the hanging ring is arranged above the lower layer reinforcing mesh and is firmly bound with the lower layer reinforcing mesh. And the leveling sleeve is welded and fixed with the corner steel bar.

S102, arranging reinforcing meshes in the formwork, and positioning the reinforcing meshes.

The edge of the reinforcing mesh is required to keep a set distance from the inner side wall of the formwork and the bottom wall of the formwork, namely, a sufficient protective layer thickness is required to be reserved. The inner wall surface of the template can be coated with an interfacial agent or salad oil, so that an isolation effect is achieved, and the condition that concrete is bonded with the template in the pouring process and is inconvenient to lift is avoided.

In this embodiment, the connecting platform and the force transmission rod groove are formed by isolating concrete with foam boards, so that the method further comprises the steps of arranging the foam boards in the formwork and positioning the foam boards.

S103, binding the embedded section of the dowel bar on a reinforcing steel bar net, and extending the extending section of the dowel bar out of the reserved through hole of the side mold of the template.

And S104, pouring concrete into the template, and vibrating.

The quality of the concrete raw material should meet the requirements of JTG/T F30-2014 in Highway concrete pavement construction technical rules. The strength grade can be selected from compressive strength C40, and the performances of the concrete such as durability, shrinkage and the like meet the specification requirements. For example, the following concrete formulations were used.

The concrete can be compacted by adopting an inserted vibrating rod. When concrete is poured, the concrete should be vibrated along with pouring, and uniform vibration should be paid attention to, so that leakage vibration, under-vibration or over-vibration cannot be caused. The vibration duration of the vibrating rod at each position is limited by the fact that the mixture is completely vibrated and liquefied, and bubbles and the flashing mud are not generated on the surface. The moving distance of the vibrating rod is not more than 500mm, and the distance from the vibrating rod to the edge of the template is not more than 200 mm. The vibrating rod should be inserted slowly and lifted, not inserted violently and pulled quickly, and is strictly prohibited to be pushed or pulled in the mixture, and the collision with a template, a hanging ring, a dowel bar, a foam plate and the like should be avoided.

S105, scraping the surface of the concrete prefabricated panel, collecting the surface, and napping after the flatness meets the specified requirements.

The surface of the concrete prefabricated panel adopts a scraping ruler to finely level and collect the surface, the concrete prefabricated panel after the facing is finely leveled has no smearing impression, is compact and uniform, has no exposed bones, and has the flatness meeting the specified requirements. The canvas or cotton cloth is sprayed with water to be wetted and then is subjected to napping treatment, so that an enough microscopic anti-sliding structure is ensured.

And S106, carrying out initial curing, removing the mold after the compressive strength of the concrete is greater than the set strength, and continuously curing to the specified age.

The concrete prefabricated panel can adopt a covering moisturizing film watering and curing mode, but is not suitable for using a water-enclosing curing mode. The initial curing time is preferably 14-21 days, the high-temperature weather is not less than 14 days, the low-temperature weather is not less than 21 days, and the moisture preservation and heat preservation curing of the previous 7 days should be noticed. In the initial stage of concrete curing, trampling is strictly prohibited until the concrete reaches 40% of the designed strength.

And after the compressive strength of the concrete is more than 8.0MPa, the mould can be disassembled. When the mold is removed, a special wedge pulling tool is adopted, the strong impact removal by a big hammer is strictly forbidden, and the plate edges and the plate corners cannot be damaged when the mold is removed. After the mould is removed, water is continuously sprayed to preserve the health to the specified age.

After the curing is finished, the dimension of the concrete prefabricated panel is measured by pulling the wire, and the precision in the three directions of length, width and thickness is ensured to meet the design requirement. The external appearance quality and the dimensional deviation should meet the following table. If not, the necessary cutting and grinding treatment is adopted.

And S2, hoisting the concrete precast panel to the paved leveling layer, and assembling.

And (3) according to the weight of the concrete prefabricated panel, selecting a crane with a proper tonnage to hoist the concrete prefabricated panel to the paved leveling layer, and assembling. When the concrete prefabricated panel is assembled, the steel base plate is arranged on the leveling layer below the leveling screw rod of the concrete prefabricated panel, and the leveling screw rod is prevented from directly falling into the leveling layer in the process of adjusting the flatness of the concrete prefabricated panel.

And S3, adjusting the flatness of the concrete prefabricated panel and fixing the concrete prefabricated panel.

And rotating the leveling screw rod to adjust the flatness of the concrete prefabricated panel, and fixing the concrete prefabricated panel by using the stirrup rings sleeved on the outer sides of the four adjacent hanging rings.

S4, plugging a gap between the outer side surface of the peripheral concrete prefabricated panel and the leveling layer, pouring grouting materials into the grouting holes, and stopping grouting when the grouting holes at the highest position overflow and rise to be level with the top surface of the prefabricated panel at the highest position; if the grout surface is lowered within the set observation time, the grout needs to be replenished.

The single-sided plank of pasting the cushion can be adopted and the gap between lateral surface and the leveling layer of peripheral precast concrete panel carries out the shutoff, also can adopt the mortar to carry out the shutoff to the gap between lateral surface and the leveling layer of peripheral precast concrete panel, prevents that grout material outflow can't pour into.

Before grouting, the grouting hose is plugged into the grouting hole and fixed, and the pipe orifice is properly separated from the hole bottom. During grouting, pressure grouting equipment can be adopted, and the grouting pressure is properly reduced, such as controlled at about 0.2 MPa. And maintaining grouting pressure, and simultaneously grouting by multiple groups of personnel. During grouting, construction is carried out from a low position to a high position according to longitudinal and transverse slopes, each plate is grouted from the high position to the low position, grouting holes at the highest position overflow grout and rise to be level with the top surface of the prefabricated panel at the highest position, and grouting is stopped. The grouting material is fully diffused and permeated between the concrete prefabricated panel and the leveling layer, and the effects of compaction and filling are achieved. Observing for 5 minutes, if the slurry surface is lowered and lost, grouting should be supplemented in time in the process to ensure that the pore part is filled, and the purpose of uniformly supporting the prefabricated concrete by the leveling layer is achieved. The grouting material used may be any one selected from the following tables.

And S5, when the force transmission rod groove of the concrete prefabricated panel is filled with grouting materials, pouring concrete to the connecting platform of the concrete prefabricated panel.

And (5) pouring, tamping, leveling and napping concrete with the same mark number as the precast concrete panel. And concrete is poured to the connecting platform from the lower part to the higher part in sequence.

S6, carving anti-skid grains on the concrete prefabricated panel.

The concrete prefabricated panel can be engraved with a engraving machine with transverse anti-slip patterns with the depth of 2 mm-4 mm, the width of 3 mm-5 mm and the groove spacing of 15 mm-25 mm, the concrete prefabricated panel forms larger macroscopic structure depth after being engraved, the friction coefficient can reach about 0.6, the friction coefficient attenuation is slow, and the use requirement of a highway can be met.

And S7, cleaning joints among the precast concrete panels, and drying and filling joints.

The joint can be cleaned by a joint cutter along the joint, the corners of the concrete prefabricated panel are not damaged, then sundries and floating dust in the joint are cleaned by a high-pressure air gun, and the joint is washed by a high-pressure water gun.

The seam is dried by natural air drying or electric hot air drying so as to prevent the seam filling material from foaming due to the influence of moisture.

After the seam is dried, the seam can be directly pressed into a backing strip, and the clearance of the backing strip is controlled between 2cm and 3 cm. The joint filling material can be filled into the joint manually or mechanically, the joint filling material is filled into the joint fully and uniformly, the joint filling depth meets the requirements of design and specification, the joint filling is ensured to be rich in elasticity and toughness, and the joint filling material can play the roles of sealing, water proofing and sand prevention stone embedding.

And S8, curing the prefabricated assembled concrete pavement, and then opening the traffic.

Claims

1. The utility model provides a prefabricated assembled concrete pavement which characterized in that: the concrete precast slab leveling device comprises a plurality of concrete precast panels which are paved on a leveling layer and are rectangular overall, wherein the top surfaces of the concrete precast panels are recessed at four corners to form a connecting platform, and the connecting platform is provided with a hoisting device which is matched with hoisting equipment to hoist the concrete precast panels and a leveling device which is used for adjusting the flatness of the concrete precast panels; a dowel bar is embedded in one side of the concrete precast panel, and a dowel bar groove capable of accommodating the extending section of the dowel bar butted with the concrete precast panel is arranged on the other opposite side of the concrete precast panel; four adjacent corners of four adjacent concrete prefabricated panels jointly enclose a grouting hole;

2. A precast fabricated concrete pavement according to claim 1, wherein: the hoisting device is a hoisting ring pre-buried in the connecting platform.

3. A precast fabricated concrete pavement according to claim 2, wherein: still including cup jointing the stirrup ring that is used for fixing four adjacent rings in the outside of four adjacent rings.

4. A precast fabricated concrete pavement according to claim 1, wherein: the leveling device comprises a leveling sleeve and a leveling screw, wherein an internal thread matched with the external thread of the leveling screw is formed on the inner side of the leveling sleeve; the bottom surface of the concrete prefabricated panel is located in the area corresponding to the lower end of the leveling sleeve, a space for containing a base plate arranged on a leveling layer is formed in the area corresponding to the lower end of the leveling sleeve, and the leveling screw rod can support against the base plate.

5. The precast assembled concrete pavement according to claim 4, wherein: the concrete precast panel is internally provided with a double-layer reinforcing mesh, and the leveling sleeve is welded and fixed with the reinforcing steel bar.

6. A precast fabricated concrete pavement according to claim 1, wherein: the cross section of the pulp flow channel is triangular, and the pulp flow channel comprises two first pulp flow channels communicated with the grouting hole, a plurality of second pulp flow channels arranged between the two first pulp flow channels and parallel to the first pulp flow channels, and a plurality of third pulp flow channels which are vertical to the first pulp flow channels and communicated with the first pulp flow channels and the second pulp flow channels;

the corners of the concrete prefabricated panel adopt a chamfer angle form in the height direction.