A road prefabricated slab of partially self-stressed concrete

Abstract

The present application relates to the road construction material technical field, specifically to a kind of road partially self-stress concrete precast slab, it includes: main board body, the top of the main board body is horizontal rectangular plane, inside is equipped with steel bar grid, and the bottom of the main board body is equipped with multiple transverse and longitudinal staggered reinforcing bars, and be isolated into multiple containing grooves by each reinforcing bar;Balloon, the balloon is multiple settings, and respectively embedded in each containing groove, the bottom of each balloon is respectively equipped with liquid injection pipe, and the free end of the liquid injection pipe is equipped with liquid injection valve.The present application is converted into semi-flexible structure by the idea of "softness overcomes rigidity", with durability and economy, it is suitable for high load traffic area and geology unstable section, also use maintenance channel, roof column and independent balloon unit to realize "targeted repair".

Description

Technical Field

[0001] This invention relates to the field of road construction materials technology, specifically to a precast self-stressing concrete slab for road use. Background Technology

[0002] In traditional concrete pavement construction, continuous pavement structures are typically formed by casting concrete on-site. However, this construction method has the following drawbacks:

[0003] Foundation settlement leads to road damage: Due to uneven soil quality or long-term load, uneven settlement of the foundation is prone to occur, which causes stress concentration in rigid concrete pavement, resulting in cracks, fractures or local collapses. Especially under the repeated rolling of large vehicles, the damage will spread more rapidly.

[0004] Furthermore, this type of structure is difficult and costly to repair. Traditional cast-in-place concrete pavement is an integral structure, and if a part is damaged, a large area needs to be demolished and re-poured. This not only results in a long construction period but also seriously affects the road's traffic capacity and increases maintenance costs.

[0005] Cast-in-place concrete pavements have high requirements for the flatness and bearing capacity of the foundation. If the foundation treatment is not sufficient, the pavement is prone to deformation and loss of flatness, affecting driving comfort and safety.

[0006] Therefore, there is an urgent need for a new type of precast concrete slab structure that can adapt to foundation deformation and improve crack resistance and durability, thereby extending the service life of the pavement and reducing maintenance costs. Summary of the Invention

[0007] This invention provides a precast self-stressing concrete slab for road use. By adopting the concept of "using flexibility to overcome rigidity", it transforms rigid pavement into a semi-flexible structure, which combines durability and economy. It is suitable for high-load traffic areas and geologically unstable road sections. It also utilizes maintenance channels, top columns and independent balloon units to achieve "targeted repair".

[0008] To achieve the above objectives, the present invention provides the following technical solution: a precast self-stressing concrete slab for road use, comprising: a main body, the top of which is a horizontal rectangular plane with a steel mesh inside, and the bottom of which is provided with multiple intersecting reinforcing ribs, which are separated into multiple receiving grooves by the reinforcing ribs; and multiple balloons, which are respectively embedded in each of the receiving grooves, each balloon having an injection tube at its bottom and an injection valve at its free end.

[0009] Preferably, one end of the main body has a semi-circular groove opened laterally, and the other end has a semi-circular tenon corresponding to the semi-circular groove, wherein the height of the semi-circular tenon is greater than the depth of the semi-circular groove.

[0010] Preferably, each of the reinforcing ribs has multiple transverse through channels at the top of each of the receiving slots; the injection tube of each balloon extends outward to both sides of the main body through the channels.

[0011] Preferably, each of the receiving slots is provided with a hanging ring at the bottom, and the main body is provided with a constraint net at the bottom, the constraint net being connected to the main body through the hanging ring.

[0012] Preferably, the top of the main board body is provided with a maintenance channel corresponding to the center of each of the receiving slots, and a top cover that is threadedly engaged with the maintenance channel.

[0013] Preferably, each of the maintenance channels has a rounded chamfer at the bottom inner edge, an elastic opening ring on the inner wall of the maintenance channel, and a top post vertically arranged inside the maintenance channel. The top post is connected to the inner circumference of the elastic opening ring by multiple tension springs. The top of the top post extends into the interior of the upper cover and is fixedly fitted with an iron cap.

[0014] Preferably, the balloon is filled with a non-Newtonian fluid.

[0015] Preferably, the balloon is filled with antifreeze.

[0016] The beneficial effects of this invention are as follows: This precast concrete slab technology for road use, through innovative structural design, effectively solves the defects of traditional cast-in-place concrete pavements. The precast slabs are produced in a factory and assembled on-site, avoiding the curing period of cast-in-place concrete and accelerating construction progress. Reinforcing ribs and steel mesh synergistically enhance tensile strength and extend pavement life. After assembly, adjacent main slabs form a hinged joint by semi-circular tenons embedded in semi-circular grooves, allowing for slight rotation and displacement, releasing temperature and settlement stresses, and avoiding cracks caused by rigid connections.

[0017] The balloons in the bottom containment tank are filled with non-Newtonian fluid or antifreeze. When uneven settlement occurs in the foundation, maintenance personnel redistribute the fluid volume in each balloon through injection valves, thereby absorbing local stress and preventing stress concentration from being transmitted to the main body. The non-Newtonian fluid's properties allow it to dynamically adapt to vehicle loads and foundation deformation. The antifreeze is suitable for cold northern climates, so an appropriate filling fluid can be selected based on geographical characteristics. Interlaced reinforcing ribs enhance overall bending stiffness, and a restraint net uses hanging rings to fix the balloon positions, preventing displacement and ensuring deformation coordination.

[0018] Compensation is achieved by adjusting the range of the upper cover balloon. After installation, sand is filled into the containment groove to reduce the space within the groove, ensuring the balloon meets support requirements within its safe expansion range. The balloon can also be replaced through the maintenance channel. After inflation, the top of the balloon presses into the maintenance channel, lifting the top column and moving the iron cap to the center of the upper cover. Maintenance personnel can then use a metal detector or magnet to measure the iron cap's height. If the iron cap is too high, it indicates a foundation protrusion and excessive compression of the balloon, requiring the release of excess fluid via the injection valve. If the iron cap is too low, it indicates foundation subsidence in that area, requiring fluid replenishment of the balloon. Therefore, this structure allows for rapid inspection of the laid main body and timely maintenance before damage occurs.

[0019] Flexible balloon systems compensate for uneven foundation settlement, reducing stringent requirements on foundation flatness and bearing capacity, making them particularly suitable for soft soil or backfill areas. Antifreeze-filled balloons resist frost heave at low temperatures, while non-Newtonian fluids adapt to dynamic loads, enhancing stability under extreme climates. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the mainboard body docking structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the maintenance channel structure of the present invention.

[0024] In the diagram: 1. Main body; 2. Steel mesh; 3. Reinforcing rib; 4. Receiving groove; 5. Balloon; 6. Injection pipe; 7. Injection valve; 8. Semicircular groove; 9. Semicircular tenon; 10. Restraint net; 11. Maintenance channel; 12. Top cover; 13. Rounded chamfer; 14. Elastic open ring; 15. Top column; 16. Iron cap. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] according to Figure 1 , Figure 2 , Figure 3 As shown, a road-use self-stressed concrete precast slab includes: a main body 1, the top of the main body 1 being a horizontal rectangular plane with a steel mesh 2 inside, and the bottom of the main body 1 having multiple intersecting reinforcing ribs 3, which are separated into multiple receiving grooves 4 by the reinforcing ribs 3; a semi-circular groove 8 is opened laterally at one end of the main body 1, and a semi-circular tenon 9 corresponding to the semi-circular groove 8 is provided at the other end, the height of the semi-circular tenon 9 being greater than the depth of the semi-circular groove 8.

[0027] Multiple balloons 5 are provided and embedded in each of the receiving slots 4. Each balloon 5 has a liquid injection tube 6 at its bottom, and a liquid injection valve 7 is provided at the free end of the liquid injection tube 6. Each reinforcing rib 3 has multiple transverse through channels corresponding to the top of each receiving slot 4; the liquid injection tube 6 of each balloon 5 extends outward to both sides of the main body 1 through the channels. Each receiving slot 4 has a hanging ring at its bottom, and the main body 1 has a restraint net 10 at its bottom, which is connected to the main body 1 through the hanging ring.

[0028] The main board body 1 has a maintenance channel 11 at the center of each of the receiving slots 4, and a top cover 12 that is threaded into the maintenance channel 11. The bottom inner edge of each maintenance channel 11 has a rounded chamfer 13, the inner wall of the maintenance channel 11 has an elastic opening ring 14, and a top post 15 is vertically provided inside the maintenance channel 11. The top post 15 is connected to the inner circumference of the elastic opening ring 14 by multiple tension springs; the top end of the top post 15 extends into the interior of the top cover 12 and is fixedly provided with an iron cap 16.

[0029] This road construction solution, utilizing partially self-stressed precast concrete slabs, effectively addresses the shortcomings of traditional cast-in-place concrete pavements through innovative structural design. The precast slabs are factory-produced and assembled on-site, eliminating the need for curing cast-in-place concrete and accelerating construction. Reinforcing ribs 3 and steel mesh 2 work together to enhance tensile strength and extend pavement life. After assembly, adjacent main slabs 1 are hinged together via semi-circular tenons 9 that fit into semi-circular grooves 8, allowing for slight rotation and displacement, releasing temperature and settlement stresses, and preventing cracks caused by rigid connections.

[0030] The bulbs 5 within the bottom receiving tank 4 are filled with non-Newtonian fluid or antifreeze. When uneven settlement occurs in the foundation, maintenance personnel redistribute the fluid volume within each bulb 5 via the injection valve 7, thereby absorbing localized stress and preventing stress concentration from being transmitted to the main body 1. The non-Newtonian fluid's properties allow it to dynamically adapt to vehicle loads and foundation deformation. The antifreeze is suitable for cold northern climates, thus allowing for the selection of an appropriate filling fluid based on geographical characteristics. Interlaced reinforcing ribs 3 enhance overall bending stiffness, and the restraint net 10 secures the bulbs 5 to their positions via hanging rings, preventing displacement and ensuring deformation coordination.

[0031] Compensation is achieved by adjusting the range of the balloon 5 on the upper cover 12. After installation, sand is filled into the receiving groove 4 to reduce the space within the groove, ensuring that the balloon 5 meets the support requirements within the safe expansion range. Additionally, the balloon 5 can be replaced through the maintenance channel 11. After the balloon 5 inflates, its top presses into the maintenance channel 11, lifting the top column 15 and moving the iron cap 16 to the middle of the upper cover 12. Maintenance personnel can then use a metal detector or magnet to measure the height of the iron cap 16. If the iron cap 16 is too high, it indicates a protrusion in the foundation, meaning the balloon 5 is over-compressed, requiring the release of excess liquid through the injection valve 7. If the iron cap 16 is too low, it indicates a subsidence in the foundation area, requiring liquid replenishment to the balloon 5. Therefore, this structure allows for rapid inspection of the main body 1 after installation and timely maintenance before damage occurs.

[0032] The Flexible Balloon 5 system compensates for uneven foundation settlement, reducing stringent requirements on foundation flatness and bearing capacity, making it particularly suitable for soft soil or backfill areas. The antifreeze-filled Balloon 5 resists frost heave and, as a non-Newtonian fluid, adapts to dynamic loads, enhancing stability under extreme climates.

[0033] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A road prefabricated panel of partially self-stressing concrete, characterized in that, The utility model provides a kind of inflatable foundation plate, including: Main plate body (1), the top of the main plate body (1) is horizontal rectangular plane, inside is equipped with steel mesh grid (2), and the bottom of the main plate body (1) is equipped with multiple transverse and longitudinal staggered reinforcing bars (3), and multiple containing grooves (4) are isolated by each reinforcing bar (3); Balloon (5), the balloon (5) is multiple setting, and respectively embedded in each containing groove (4), the bottom of each balloon (5) is respectively equipped with liquid injection pipe (6), and the free end of the liquid injection pipe (6) is equipped with liquid injection valve (7); Each reinforcing bar (3) is equipped with multiple transverse channels corresponding to the top of each containing groove (4);The liquid injection pipe (6) of each balloon (5) respectively extends to the outside of the two sides of the main plate body (1) through the channel; The top of the main plate body (1) is equipped with maintenance channel (11) corresponding to the center of each containing groove (4), and upper cover (12) is screwed with the maintenance channel (11); The bottom of each maintenance channel (11) is equipped with round fillet (13), the inner wall of the maintenance channel (11) is equipped with elastic split ring (14), and the vertical inside of the maintenance channel (11) is equipped with top column (15), and the top column (15) is connected with the inner circle of elastic split ring (14) by multiple tension springs;The top end of the top column (15) extends to the inside of the upper cover (12) and is fixedly equipped with iron cap (16); The adjusting range of the balloon (5) is compensated by opening the upper cover (12), after laying, sand is filled into the containing groove (4), to reduce the space in the containing groove (4), to ensure that the balloon (5) reaches the support requirement in the safe inflation range;The balloon (5) is replaced through the maintenance channel (11);After the balloon (5) is inflated, the top is extruded into the inside of the maintenance channel (11), so that the top column (15) is lifted, and the iron cap (16) moves to the middle of the upper cover (12), and the height of the iron cap (16) is collected by the metal detector or magnet equipment, when the iron cap (16) is too high, it represents that the foundation has protrusion, and the balloon (5) is excessively extruded, and the excess liquid needs to be released through the liquid injection valve (7);When the height of the iron cap (16) is too low, it represents that the foundation is lowered, and the balloon (5) needs to be supplemented with liquid;The laid main plate body (1) is quickly detected through the structure, and maintenance is carried out in time before the main plate body (1) is damaged; The bottom of each containing groove (4) is respectively equipped with hanging ring, and the bottom of the main plate body (1) is equipped with restraint net (10), and the restraint net (10) is connected with the main plate body (1) through the hanging ring.

2. A partially self-stressing concrete precast panel for road use according to claim 1, characterized in that: One end of the main plate body (1) is transversely provided with semicircular groove (8), and the other end is provided with semicircular tenon (9) corresponding to the semicircular groove (8), and the height of the semicircular tenon (9) is greater than the depth of the semicircular groove (8).

3. A partially self-stressing concrete precast panel for road use according to claim 1, characterized in that: The balloon (5) is filled with non-newtonian fluid.

4. A partially self-stressing concrete precast panel for road use according to claim 1, characterized in that: The balloon (5) is filled with antifreeze.

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