Concrete pavement structure of large heavy-load parking lot

Abstract

The utility model discloses a large-scale heavy-load parking lot concrete pavement structure, which relates to the technical field of parking lot concrete pavement, and comprises a plurality of concrete panels, a plurality of dowel bar notches are arranged on four sides of each concrete panel, dowel bars are arranged inside the dowel bar notches, stress sensors are arranged outside one ends of the dowel bars, and the stress sensors are connected with the dowel bar notches. A surface layer reinforcing mesh is arranged at the inner bottom of the concrete panel, a lean concrete base layer is arranged at the bottom of the concrete panel, an isolation layer is arranged at the bottom of the lean concrete base layer, and a graded broken stone hardcore is arranged at the bottom of the isolation layer. The parking lot pavement structure is reasonable and reliable in structure and easy to operate, the isolation layer is arranged between the lean concrete base layer and the graded broken stone hardcore, impurities can be effectively filtered out, the true seams of the dowel bars are arranged in the longitudinal direction and the transverse direction of the concrete panel, the stress characteristics of the parking lot pavement structure are met, the probability of concrete seam damage is reduced, and the service life of the parking lot pavement structure is prolonged. Therefore, the overall strength and the service life of the concrete pavement structure are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of parking lot concrete pavement, in particular to a large-scale heavy-load parking lot concrete pavement structure. Background Art

[0002] In some large, heavily loaded parking lots, the concrete pavement structure may experience early damage, such as cracks and localized dents. This is particularly noticeable at parking lot entrances and exits, and in areas where heavy vehicles frequently turn and brake. Vehicle loads are often estimated inaccurately during design, failing to fully account for the unique load conditions of oversized and overloaded vehicles. For example, the axle weights of some large construction vehicles can far exceed standard design loads. If design calculations are based on conventional vehicle loads, the concrete pavement structure would be susceptible to damage under these excessive loads. The current major problem is the insufficient bearing capacity of the concrete pavement structure and cracking caused by improperly configured longitudinal and transverse joints.

[0003] Currently, no effective solutions have been proposed for the problems in related technologies. Utility Model Content

[0004] In response to the problems in the related art, the utility model proposes a large-scale heavy-load parking lot concrete pavement structure to overcome the above-mentioned technical problems existing in the existing related art.

[0005] To this end, the specific technical solutions adopted in this utility model are as follows:

[0006] A large heavy-load parking lot concrete pavement structure includes several concrete panels. Several dowel rod slots are opened on all four sides of the concrete panels. Dowel rods are arranged inside the dowel rod slots. Stress sensors are arranged on the outside of one end of the dowel rods. A surface steel mesh is provided at the inner bottom of the concrete panel. A lean concrete base layer is provided at the bottom of the concrete panel. An isolation layer is provided at the bottom of the lean concrete base layer. A graded crushed stone cushion layer is provided at the bottom of the isolation layer.

[0007] Furthermore, in order to provide effective load dispersion for the concrete pavement structure under the action of the surface steel mesh, avoid local stress concentration caused by heavy loads, and help improve the crack resistance of the structure, thereby improving the overall strength of the concrete pavement structure, the surface steel mesh includes a number of first steel plates and a number of second steel plates arranged at the bottom of the concrete panel, and the first steel plates and the second steel plates are arranged crisscross, the cross-sections of the first steel plates and the second steel plates are both arranged in a wavy shape, the tops of the first steel plates are each provided with a wavy groove, and the tops of the second steel plates are each provided with a number of hexagonal protrusions.

[0008] Furthermore, in order to prevent the mutual mixing between the graded gravel cushion layer and the lean concrete base layer under the action of the isolation layer, and at the same time have a certain drainage and isolation effect, to avoid the fine particles in the graded gravel cushion layer from entering the lean concrete base layer and affecting its performance, and also to make the isolation layer itself have tear resistance and tensile resistance, thereby improving the stability and service life of the concrete pavement structure, the isolation layer includes a buffer layer arranged at the bottom end of the lean concrete base layer, a polymer structure layer is arranged at the bottom end of the buffer layer, a geotextile layer is arranged at the bottom end of the polymer structure layer, a plurality of buffer holes are arranged inside the buffer layer, and the buffer holes are equidistant and evenly arranged inside the buffer layer, the cross-section of the buffer hole is set to an elliptical structure, and the inside of the polymer structure layer is provided with criss-crossing nylon strips.

[0009] The beneficial effects of the utility model are:

[0010] 1. The utility model has a reasonable and reliable structure and is easy to operate. By adopting a 30cm graded crushed stone cushion layer, the stress transmitted from the base layer can be effectively dispersed. An isolation layer is set between the lean concrete base layer and the graded crushed stone cushion layer, which can effectively filter impurities. In addition, true joints of force transmission rods are set in the longitudinal and transverse directions of the concrete panel, which is more in line with the stress characteristics of the parking lot pavement structure and greatly reduces the probability of concrete joint diseases. The concrete panel adopts a prefabricated assembly structure, which can greatly improve the installation efficiency. At the same time, stress sensors are set on the force transmission rods, which can predict potential damage to the road surface in advance, such as cracks, settlement, etc., so that maintenance measures can be taken in advance to avoid further expansion of road damage and extend the service life of the road surface, thereby improving the overall strength and service life of the concrete pavement structure.

[0011] 2. By setting the surface steel mesh, a stable mesh structure is formed under the crisscross arrangement of the first steel plate and the second steel plate, which can effectively disperse the load, avoid local stress concentration caused by heavy load, and help improve the crack resistance of the structure. The cross-section of the wavy steel plate increases the contact area between the steel plate and the concrete, improves the bonding force, helps to resist shear force, and ensures the overall stability of the pavement under heavy load conditions. Under the action of the wavy grooves and hexagonal protrusions, it can not only further increase the friction force, but also effectively prevent the steel plate from slipping in the concrete, ensuring that the surface steel mesh is firmly bonded to the concrete, thereby improving the overall strength of the concrete pavement structure.

[0012] 3. By setting up an isolation layer, under the action of the buffer holes inside the buffer layer, the isolation layer will not crack or deform after long-term use, and can adapt to changes in different temperatures in the external environment, thereby improving the service life of the isolation layer itself. In addition, under the action of the criss-crossing nylon strips inside the polymer structure layer, the strength of the isolation layer itself can be improved, so that the isolation layer has strong tear resistance and tensile resistance. At the same time, under the action of the geotextile layer, it can prevent the graded gravel cushion layer and the lean concrete base from mixing with each other, has a certain drainage and isolation effect, and avoids fine particles in the graded gravel cushion layer from entering the lean concrete base and affecting its performance, thereby improving the stability and service life of the concrete pavement structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a structural schematic diagram of a large-scale heavy-load parking lot concrete pavement structure according to an embodiment of the present utility model;

[0015] Figure 2 This is a structural schematic diagram of a concrete panel in a large-scale heavy-load parking lot concrete pavement structure according to an embodiment of the present utility model;

[0016] Figure 3 This is a structural schematic diagram of an isolation layer in a concrete pavement structure of a large heavy-load parking lot according to an embodiment of the present utility model;

[0017] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle;

[0018] Figure 5 The utility model is a structural schematic diagram of an isolation layer in a concrete pavement structure of a large heavy-load parking lot according to an embodiment of the present invention.

[0019] In the picture:

[0020] 1. Concrete panel; 2. Dowel rod notch; 3. Dowel rod; 4. Stress sensor; 5. Surface steel mesh; 501. First steel plate; 502. Second steel plate; 503. Wave groove; 504. Hexagonal protrusion; 6. Lean concrete base; 7. Isolation layer; 701. Buffer layer; 7011. Buffer hole; 702. Polymer structure layer; 7021. Nylon strip; 703. Geotextile layer; 8. Graded gravel cushion layer. DETAILED DESCRIPTION

[0021] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. By referring to these contents, ordinary technicians in this field should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0022] According to an embodiment of the utility model, a large-scale heavy-load parking lot concrete pavement structure is provided.

[0023] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figure 1-Figure 5 As shown, the concrete pavement structure of a large heavy-load parking lot according to an embodiment of the present invention includes several concrete panels 1 (i.e., reinforced concrete surface layers), several dowel rod slots 2 are opened on all four sides of the concrete panel 1, dowel rods 3 are arranged inside the dowel rod slots 2, and a stress sensor 4 is arranged on the outside of one end of the dowel rod 3, a surface layer steel mesh 5 is provided at the inner bottom of the concrete panel 1, a lean concrete base layer 6 is provided at the bottom of the concrete panel 1, an isolation layer 7 is provided at the bottom of the lean concrete base layer 6, and a graded crushed stone cushion layer 8 is provided at the bottom of the isolation layer 7.

[0024] In one embodiment, for the above-mentioned surface steel mesh 5, the surface steel mesh 5 includes a plurality of first steel plates 501 and a plurality of second steel plates 502 arranged at the bottom inner side of the concrete panel 1, and the first steel plates 501 and the second steel plates 502 are arranged crisscrossed, and the cross-sections of the first steel plates 501 and the second steel plates 502 are both arranged in a wavy shape, and the tops of the first steel plates 501 are each provided with a wavy groove 503, and the tops of the second steel plates 502 are each provided with a plurality of hexagonal protrusions 504, so that under the action of the surface steel mesh 5, an effective dispersed load can be provided for the concrete pavement structure, thereby avoiding local stress concentration caused by heavy loads, helping to improve the crack resistance of the structure, and thus improving the overall strength of the concrete pavement structure.

[0025] In one embodiment, for the above-mentioned isolation layer 7, the isolation layer 7 includes a buffer layer 701 arranged at the bottom end of the lean concrete base layer 6, a polymer structure layer 702 is arranged at the bottom end of the buffer layer 701, a geotextile layer 703 is arranged at the bottom end of the polymer structure layer 702, and a plurality of buffer holes 7011 are arranged inside the buffer layer 701, and the buffer holes 7011 are equidistant and evenly arranged inside the buffer layer 701. The cross-section of the buffer hole 7011 is set to an elliptical structure, and the polymer structure layer 702 is provided with criss-crossing nylon strips 7021, so that under the action of the isolation layer 7, the graded gravel cushion layer 8 and the lean concrete base layer 6 can be prevented from mixing with each other, and at the same time, it has a certain drainage and isolation effect, avoiding fine particles in the graded gravel cushion layer 8 from entering the lean concrete base layer 6 and affecting its performance, and also makes the isolation layer 7 itself have tear resistance and tensile strength, thereby improving the stability and service life of the concrete pavement structure.

[0026] The specific operating principle of the isolation layer 7 is as follows: The equidistant and evenly distributed buffer holes 7011 help evenly distribute pressure and reduce local stress concentrations. The elliptical cross-sectional design provides better stress distribution, increasing the buffer layer's adaptability to loads in all directions, making it suitable for handling multi-directional load impacts. The buffer layer's primary function is to absorb and disperse pressure or impact transmitted from the upper layer. The internal buffer holes 7011 further enhance the cushioning effect and provide appropriate elasticity, allowing the buffer layer to deform and absorb energy under load. Criss-crossing nylon strips 7021 are embedded within the polymer structure layer 702, effectively enhancing the layer's structural strength and stability and preventing plastic deformation under prolonged stress. The staggered arrangement of the nylon strips 7021 provides lateral and longitudinal support, maintaining stability under multi-directional loads. The geotextile layer 703 has excellent permeability and anti-seepage properties, effectively filtering seepage water and maintaining the stability of the isolation layer structure. Its fiber structure allows water to pass through, preventing particle migration and providing protection.

[0027] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process is described in detail below.

[0028] In actual application, the foundation treatment is carried out first. The compaction degree of 80cm roadbed is recommended to be between 93% and 95%. The foundation treatment scheme can be selected according to the geological and filling and excavation conditions, such as ash mixing treatment, replacement treatment, etc., and then the 30cm graded gravel cushion layer 8 structure is backfilled. An isolation layer 7 is set on the top of the graded gravel cushion layer 8 to prevent the graded gravel cushion layer 8 and the lean concrete base layer 6 from mixing with each other. At the same time, it has a certain drainage and isolation effect, avoiding the fine particles in the graded gravel cushion layer 8 from entering the lean concrete base layer 6 and affecting its performance. It also makes the isolation layer 7 itself have tearing and tensile resistance, thereby improving the stability and service life of the concrete pavement structure. The graded gravel cushion layer 8 is paved on top. A 30cm lean concrete base layer 6 is constructed without joints. Finally, a 30cm C30 reinforced concrete surface layer is paved, with a surface steel mesh 5 set in the middle. The third-grade steel bars have a diameter of 12cm and a longitudinal and transverse spacing of 20cm. Contraction joints and expansion joints are set. Considering that the vehicle driving trajectory inside the parking lot is bidirectional, the joints do not distinguish between transverse and longitudinal directions. Contraction joints are false joints for setting dowel rods 3, and the contraction joint spacing should be 8 to 10m. Expansion joints are real joints for setting dowel rods 3. Expansion joints should be set at connections with other structures such as bridges and passages, road intersections, and the starting and ending points of small-radius flat curves, which are prone to expansion and deformation. Stress sensors 4 are set on the dowel rods 3 to effectively predict the type of pavement damage.

[0029] In addition, elastic materials such as rubber and polyurethane are embedded in the contraction joints and expansion joints to improve the deformation capacity of the structure under seismic loads and reduce the risk of cracking. The concrete panel 1 is a prefabricated assembly structure. Two pairs of sides of the concrete panel 1 are provided with dowel rods 3, and the other two pairs of sides are provided with dowel rod slots 2, which facilitates rapid installation in the later stage. When the concrete panel 1 is damaged, it can also greatly improve the replacement efficiency. Stress sensors 4 are set on the dowel rods 3. When the dowel rods 3 are subjected to abnormal force, the stress sensors 4 can promptly issue an early warning signal. For example, if the force borne by the dowel rods 3 exceeds the design value, it means that there is potential damage to the road surface, such as cracks, settlement, etc., and maintenance measures can be taken in advance to prevent further expansion of the road surface damage and extend the service life of the road surface.

[0030] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A large heavy-load parking lot concrete pavement structure, comprising a plurality of concrete panels (1), characterized in that: The concrete panel (1) is provided with a plurality of force transmission rod slots (2) on all four sides, a force transmission rod (3) is provided inside the force transmission rod slots (2), a stress sensor (4) is provided on the outside of one end of the force transmission rod (3), a surface steel mesh (5) is provided on the inner bottom of the concrete panel (1), a lean concrete base layer (6) is provided on the bottom of the concrete panel (1), an isolation layer (7) is provided on the bottom of the lean concrete base layer (6), and a graded crushed stone cushion layer (8) is provided on the bottom of the isolation layer (7).

2. A large-scale heavy-load parking lot concrete pavement structure according to claim 1, characterized in that: The surface layer steel mesh (5) comprises a plurality of first steel plates (501) and a plurality of second steel plates (502) arranged at the bottom of the concrete panel (1), and the first steel plates (501) and the second steel plates (502) are arranged in a crisscross manner.

3. A large-scale heavy-load parking lot concrete pavement structure according to claim 2, characterized in that: The cross-sections of the first steel plate (501) and the second steel plate (502) are both configured to be wavy.

4. A large-scale heavy-load parking lot concrete pavement structure according to claim 3, characterized in that: The tops of the first reinforcement plates (501) are each provided with a wave groove (503), and the tops of the second reinforcement plates (502) are each provided with a plurality of hexagonal protrusions (504).

5. The large-scale heavy-load parking lot concrete pavement structure according to claim 1 is characterized in that: The isolation layer (7) comprises a buffer layer (701) arranged at the bottom end of the lean concrete base layer (6), a polymer structure layer (702) is arranged at the bottom end of the buffer layer (701), and a geotextile layer (703) is arranged at the bottom end of the polymer structure layer (702).

6. A large-scale heavy-load parking lot concrete pavement structure according to claim 5, characterized in that: A plurality of buffer holes (7011) are provided inside the buffer layer (701), and the buffer holes (7011) are arranged equidistantly and evenly inside the buffer layer (701), and the cross section of the buffer holes (7011) is arranged to be an elliptical structure.

7. A large-scale heavy-load parking lot concrete pavement structure according to claim 6, characterized in that: The polymer structure layer (702) is provided with crisscrossing nylon strips (7021) inside.

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