Large-area concrete anti-crack terrace and construction method thereof

Abstract

The invention relates to the technical field of road construction, discloses a large-area concrete anti-crack terrace and a construction method thereof, and aims to solve the problem that a road roller needs to be used for rolling and leveling a construction site and the large-area concrete anti-crack terrace and comprises a vibrator, a controller, rollers, a vehicle head and a vehicle body. The gravel cushion layer at the bottommost layer of the large-area concrete anti-crack terrace is poured on the surface of a construction site, and better supporting force is sequentially provided for the upper layer of concrete among the gravel cushion layer, the second macadam base layer, the first macadam base layer and the concrete pavement, so that the situation that the upper layer of concrete is easily sunken and damaged under pressure is avoided; forces in three directions are formed at the contact points of the rolling ring and the construction site and the large-area concrete anti-crack floor, and extrusion force on the left side and the right side generated by the rolling ring extrudes and flattens possibly-generated stripes, so that the contact points of the rolling ring and the construction site and the large-area concrete anti-crack floor are always kept in a flat state in the rolling translation process. And the influence on leveling caused by stripes generated by vertical vibration is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of road construction, in particular to a large-area concrete anti-cracking floor and a construction method thereof. Background Art

[0002] When constructing large-scale concrete anti-cracking floor, it is necessary to measure and lay out the construction site in advance, then level the site, and then construct geogrids on the floor, spread graded sand and gravel, level and water compact. Ensure that the floor is in a relatively strong and stable effect after leveling and compaction. The compaction should be carried out in the order of low to high, from edge to middle, light first and heavy later. The main wheels of the rolling should overlap the wheel width, without leakage and dead angle, to ensure uniform compaction. Before vibration compaction, record the ground elevation, leveling point, and center pile position original record data so that the before and after data can be compared later to determine the settlement after vibration compaction.

[0003] However, when existing rollers are used for rolling and leveling, the vibration during rolling and leveling will produce periodic vertical downward jumps. When the roller moves, wave-like stripes will appear on the vibrated road surface. Although the vibration frequency can be increased to reduce the interval between the ripples, the high-frequency vibration will destroy the granular stone of the floor, and the stripes formed by the vertical vibration will affect the rolling and leveling of the floor. In addition, the floor of large-area concrete anti-cracking floor is usually poured in multiple layers to form a road, and the strength of each layer is the same, so the support force provided to the upper layer is limited, which is easy to cause inward collapse under pressure. Summary of the Invention

[0004] The present invention provides a large-area concrete anti-cracking floor and a construction method thereof, which overcomes the deficiencies described in the background technology.

[0005] The technical solution adopted by the present invention to solve its technical problem is: A large-area concrete anti-cracking floor needs to be constructed on a construction site, and includes a gravel cushion layer, a first crushed stone base layer, a second crushed stone base layer and a concrete pavement. Geogrids are provided on the upper and lower sides of the gravel cushion layer, and the geogrid wraps and shapes the gravel cushion layer. The first crushed stone base layer is located at the upper end of the geogrid on the upper side of the gravel cushion layer, a second crushed stone base layer is provided at the upper end of the first crushed stone base layer, and the concrete pavement is located at the upper end of the second crushed stone base layer.

[0006] A better technical solution: the overlap width of the geogrid is greater than 100mm, and the overlap position is fixed with steel nails, the steel nails are U-shaped, the fixing depth of the steel nails is greater than 100mm, and the fixing width is less than 2000mm. The cross-over position of the overlap between the geogrids is staggered by more than 1000mm.

[0007] A better technical solution: a construction method of a large area concrete anti-cracking floor, applied to the above-mentioned large area concrete anti-cracking floor, the specific construction method steps are as follows: S1: Surveyors survey and lay out the construction site, using a total station to place elevation control points. They then use an excavator to perform preliminary leveling of the construction site. After the site is initially leveled, a roller compacts the base 6 to 8 times. S2: The geogrid is manually laid on the surface of the construction site. The long sides of the geogrid are overlapped, and the short sides are alternately overlapped to release the elevation control points. An excavator is used in conjunction with a loader or paver to spread graded sand and gravel on the geogrid according to the elevation control points on the construction site to form a gravel cushion. The gravel cushion is then compacted and leveled with a roller, and the geogrid is laid again on the surface of the leveled gravel cushion. S3: The first crushed stone base layer and the second crushed stone base layer are sequentially paved on the gravel cushion layer, and the first crushed stone base layer and the second crushed stone base layer are mixed with concrete and stirred evenly before paving; S4: The above steps require leveling the first crushed stone base and the second crushed stone base respectively according to the elevation control points. The initial leveling is done with an excavator or loader, and then leveled with a scraper. Finally, the concrete pavement is poured on the surface of the second crushed stone base and leveled with a flatness of less than 12 mm.

[0008] A better technical solution: A roller is required for the rolling and leveling of the above-mentioned construction sites and large-area concrete anti-cracking floors. The roller includes a vibrator, a controller, a roller, a vehicle head and a vehicle body. The roller is arranged at the lower end of the vehicle body, and the roller electrical signal is connected to the controller. A hydraulic steering system is provided in the vehicle head. The hydraulic steering cylinder in the hydraulic steering system is bolted to the middle position on the right side of the vehicle body. The controller is arranged on the oblique side of the vehicle head and drives the roller to rotate and move through the controller electrical signal. The vibrator is arranged at the lower end of the vehicle head. The controller sends an electrical signal through the circuit to drive the vibrator to roll and level the construction site and gravel cushion layer.

[0009] A better technical solution: The vibrator is provided with a rotating mechanism, a rolling ring, a motor, a limit ring and a support plate. There are two support plates, which are horizontally distributed on both sides of the lower end of the vehicle head. A motor is respectively provided in the two support plates. The left and right ends of the rotating mechanism are respectively provided at the output ends of the two motors, and the rotating mechanism is synchronously driven to rotate by the two motors. The limit ring is provided on the inner side of the rolling ring. When the rotating mechanism rotates inside the limit ring, the rotating mechanism presses and vibrates against the lower right and lower left corners of the limit ring, driving the rolling ring to tilt and vibrate on the construction site and the gravel cushion layer.

[0010] A better technical solution: the rotating mechanism is provided with an arc-shaped plate, a fixed rod and a rotating rod. The arc-shaped plate is arranged on the outside of the rotating rod. There are three fixed rods. The three arc-shaped plates are distributed in a ring and fixed on the side of the support plate. The rotating rod is arranged at the output end of the motor. When the rotating rod rotates clockwise, the arc-shaped plate pushes the outside of the fixed rod to press the limit ring, driving the rolling ring to roll to the lower right and lower left in turn.

[0011] A better technical solution: the limiting ring is provided with a metal ring, a force ring, a splicing structure and an arc strip, the arc strip is embedded between the force ring and the metal ring, two splicing structures are provided, the splicing structure is embedded between every two force rings, and the force ring forms a circle, the metal ring is arranged on the inner side of the rolling ring, the force ring is arranged on the inner side of the metal ring, and two annular indented grooves are provided on the inner side of the force ring, and the three fixing rods slide correspondingly in the grooves of the force ring.

[0012] A better technical solution: The splicing structure is provided with threaded strips, snap-fit strips, magnetic blocks and splicing strips. The threaded strips are evenly arranged on the outside of the splicing strips, and the snap-fit strips are symmetrically distributed on both sides of the splicing strips. Magnetic blocks are provided on the snap-fit strips. A square gap corresponding to the splicing structure is provided on the side of the force ring and the metal ring. The snap-fit strips slide in the square gap and make the magnetic blocks adsorb and fit corresponding to the side of the arc strip.

[0013] A better technical solution: the fixed rod is provided with a sliding cylinder, a movable ring and a support rod, the movable ring is arranged on the outside of the support rod, the sliding cylinder is arranged on the outside of the movable ring, the sliding cylinder presses the movable ring with the support rod as the center, the sliding cylinder and the movable ring are respectively provided with two, and the sliding cylinder slides in correspondence with the two grooves on the force ring, and the support rod is arranged on the side of the support plate.

[0014] Compared with the existing technology, this technical solution has the following advantages: In the present invention, a gravel cushion layer is poured as the bottom layer of a large-area concrete anti-cracking floor on the surface of the construction site, and the gravel cushion layer is shaped by geogrids to prevent the gravel cushion layer from easily dispersing when the first crushed stone base, the second crushed stone base and the concrete pavement above are subjected to force, and the strength between the second crushed stone base, the first crushed stone base and the concrete pavement decreases successively, and the gravel cushion layer, the second crushed stone base, the first crushed stone base and the concrete pavement provide better support for the upper layer of concrete, thereby improving the support stability of the upper layer and preventing the upper layer of concrete from easily collapsing and being damaged under pressure.

[0015] When the rotating rod in the rotating mechanism of the present invention rotates, the arc plate squeezes the fixed rod and forms a vibration rolling effect of the rolling ring in three directions of left, right and bottom through the limiting ring, and three-directional forces are formed at the contact points of the rolling ring with the construction site and the large-area concrete anti-cracking floor. The extrusion pressure on the left and right sides generated by the rolling ring squeezes and flattens the possible stripes, so that the contact points of the rolling ring with the construction site and the large-area concrete anti-cracking floor always remain flat during the rolling and translation process, preventing stripes from being generated by up and down vibrations and affecting the leveling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and examples.

[0017] Figure 1 This is an overall diagram of the present invention.

[0018] Figure 2 A schematic plan view of the vibrator.

[0019] Figure 3 A side view of the rotating mechanism.

[0020] Figure 4 A three-dimensional schematic diagram of the fixing rod.

[0021] Figure 5 It is a partial three-dimensional schematic diagram of the limiting ring.

[0022] Figure 6 A three-dimensional schematic diagram of the splicing structure.

[0023] In the figure: gravel cushion layer 33, second crushed stone base layer 32, first crushed stone base layer 31, concrete pavement 34, geogrid 301, steel nails 302, vibrator 1, controller 2, roller 3, vehicle head 4, vehicle body 5, rotating mechanism 11, rolling ring 12, motor 13, limiting ring 14, support plate 15, curved plate 111, fixing rod 112, rotating rod 113, metal ring 141, load-bearing ring 142, splicing structure 143, curved bar 144, threaded bar 431, locking bar 432, magnetic block 433, splicing bar 434, sliding cylinder 21, movable ring 22, support rod 23. DETAILED DESCRIPTION

[0024] like Figures 1 to 4As shown, the present invention proposes a large-area concrete anti-cracking floor, which needs to be constructed on a construction site, including a gravel cushion layer 33, a first crushed stone base layer 31, a second crushed stone base layer 32 and a concrete pavement 34. The gravel cushion layer 33 is provided with geogrids 301 on the upper and lower sides, and the geogrid 301 wraps and shapes the gravel cushion layer 33. The first crushed stone base layer 32 is located at the upper end of the geogrid 301 on the upper side of the gravel cushion layer 33. The upper end of the first crushed stone base layer 32 is provided with a second crushed stone base layer 31, and the concrete pavement 34 is located at the upper end of the second crushed stone base layer 31.

[0025] Among them, the overlapping width of the geogrid 301 is greater than 100mm, and the overlapping position is fixed with steel nails 302. The steel nails 302 are U-shaped, the fixing depth of the steel nails 302 is greater than 100mm, and the fixing width is less than 2000mm. The overlapping intersection position between the geogrids 301 is staggered by more than 1000mm.

[0026] The second crushed stone base layer 32 is formed by mixing crushed stone and concrete, while the first crushed stone base layer 31 is formed by mixing gravel and concrete. The top surface reaction modulus of the second crushed stone base layer 32 is not less than 80 MN / m³, and the base layer compaction degree at the construction site is not less than 98%. The second crushed stone base layer 32 has a water-immersion compressive strength of not less than 4 MPa, and the subbase layer has a compressive strength of not less than 2.5 MPa. The gravel cushion layer 33 has a compaction degree of not less than 96%.

[0027] Among them, the geogrid 301 adopts polypropylene biaxial stretching, and the longitudinal and transverse tensile strength is not less than 30kN / m.

[0028] In addition, regarding the proportion of the gravel cushion layer 33, the gravel cushion layer is mainly composed of gravel particles and crushed stone. The total content of needle-like particles in the crushed stone should not exceed 20%. The crushed stone or crushed gravel should be multi-angular blocks. The content of weak particles should be less than 5%; the content of flat and slender crushed stone should be less than 20%. The moisture content of the filler should be controlled within the range of ±2% of the optimal moisture content.

[0029] In the present invention, a gravel cushion layer 33 is poured as the bottom layer of a large-area concrete anti-cracking floor on the surface of the construction site, and the gravel cushion layer 33 is shaped by the geogrid 301 to prevent the gravel cushion layer 33 from easily dispersing when the first crushed stone base layer 31, the second crushed stone base layer 32 and the concrete pavement 34 above are subjected to force. In addition, the strength between the second crushed stone base layer 32, the first crushed stone base layer 31 and the concrete pavement 34 decreases successively, and the gravel cushion layer 33, the second crushed stone base layer 32, the first crushed stone base layer 31 and the concrete pavement 34 provide better support for the upper layer of concrete, thereby improving the support stability of the upper layer and preventing the upper layer of concrete from easily collapsing and being damaged under pressure.

[0030] Among them, a construction method of a large area concrete anti-cracking floor is applied to the above-mentioned large area concrete anti-cracking floor. The specific construction method steps are as follows: S1: Surveyors survey and lay out the construction site, using a total station to place elevation control points. They then use an excavator to perform preliminary leveling of the construction site. After the site is initially leveled, a roller compacts the base 6 to 8 times. S2: The geogrid 301 is manually laid on the surface of the construction site. The long sides of the geogrid 301 are overlapped, and the short sides are alternately overlapped to define the elevation control points. An excavator is used in conjunction with a loader or a paver to spread graded sand and gravel on the geogrid 301 at the construction site according to the elevation control points to form a gravel cushion layer 33. The gravel cushion layer 33 is then compacted and leveled using a road roller, and the geogrid 301 is laid again on the surface of the leveled gravel cushion layer 33. S3: The first crushed stone base layer 32 and the second crushed stone base layer 31 are sequentially paved on the gravel cushion layer 33, and the first crushed stone base layer 32 and the second crushed stone base layer 31 are mixed with concrete and stirred evenly before paving; S4: The above steps require leveling the first crushed stone base 32 and the second crushed stone base 31 respectively according to the elevation control points. The initial leveling is performed using an excavator or a loader, and then leveling is performed using a scraper. Finally, a concrete pavement 34 is poured on the surface of the second crushed stone base 31 and the concrete pavement 34 is leveled with a flatness of less than 12 mm.

[0031] Among them, a roller is required for the rolling and leveling of the above-mentioned construction sites and large-area concrete anti-cracking floors. The roller includes a vibrator 1, a controller 2, a roller 3, a front 4 and a body 5. The roller 3 is arranged at the lower end of the body 5, and the electrical signal of the roller 3 is connected to the controller 2. A hydraulic steering system is provided in the front 4. The hydraulic steering cylinder in the hydraulic steering system is bolted to the middle position of the right side of the frame body 5. The controller 2 is arranged on the oblique side of the front 4, and the roller 3 is driven to rotate and move by the electrical signal of the controller 2. The vibrator 1 is arranged at the lower end of the front 4. The controller 2 sends an electrical signal through the circuit to drive the vibrator 1 to roll and level the construction site and the gravel cushion layer 33.

[0032] Among them, the vibrator 1 is provided with a rotating mechanism 11, a rolling ring 12, a motor 13, a limit ring 14 and a support plate 15. There are two support plates 15, which are horizontally distributed on both sides of the lower end of the vehicle head 4. The two support plates 15 are respectively provided with motors 13. The left and right ends of the rotating mechanism 11 are respectively provided at the output ends of the two motors 13, and the rotating mechanism 11 is synchronously driven to rotate by the two motors 13. The limit ring 14 is provided on the inner side of the rolling ring 12. When the rotating mechanism 11 rotates inside the limit ring 14, the rotating mechanism 11 presses and vibrates against the lower right and lower left corners of the limit ring 14, driving the rolling ring 12 to vibrate tiltedly on the construction site and the gravel cushion layer 33.

[0033] Among them, the controller 2 is provided with a button for controlling the motor 13 inside the vibrator 1, and the controller 2 is also provided with a steering wheel and a start button for controlling the hydraulic steering system, and a motor is provided inside the roller 3. The motor electrical signal is connected to the controller 2, and the electrical signal controls the motor drive rotation inside the roller 3, so that the roller 3 pushes the vehicle body 5 and the front of the vehicle 4 to move, and then the button electrical signal controls the vibrator 1 to vibrate and level the above-mentioned large-area concrete anti-cracking floor, so that the output end of the motor 13 drives the rotating mechanism 11 to rotate, so that the limit ring 14 is squeezed and rotated by the rotating mechanism 11, and then the rolling ring 12 vibrates and levels the construction site while rolling.

[0034] Among them, the rotating mechanism 11 is provided with an arc plate 111, a fixed rod 112 and a rotating rod 113. The arc plate 111 is arranged on the outside of the rotating rod 113. There are three fixed rods 112. The three arc plates 111 are distributed in a ring and fixed on the side of the support plate 15. The rotating rod 113 is arranged at the output end of the motor 13. When the rotating rod 113 rotates clockwise, the arc plate 111 pushes the outside of the fixed rod 112 to press the limit ring 14, driving the rolling ring 12 to roll to the lower right and lower left in turn.

[0035] In addition, there are three rolling rings 12, the two lower rolling rings 12 are parallel to the horizontal line, and the two lower rolling rings 12 are respectively inclined at 60 degrees with the motor 13 as the center. When the rotating rod 113 drives the arc plate 111 to rotate clockwise, the arc plate 111 squeezes the fixed rod 112, and when the fixed rod 112 is fixed in the middle, the outer side of the fixed rod 112 presses the limit ring 14. At this time, the limit ring 14 moves to the lower right with the rotating rod 113 as the center. After the arc plate 111 disengages from the fixed rod 112 on the lower right under rotation, it also presses and pushes the fixed rod 112 on the lower left, so that the fixed rod 112 on the lower left drives the limit ring 14 to move to the lower left. When the arc plate 111 rotates to the upper fixed rod 112, The limiting ring 14 is driven to move upward by the fixed rod 112. Therefore, under the rapid rotation of the arc plate 111, the limiting ring 14 drives the outer rolling ring 12 to form an extrusion effect on the left and right sides, and the construction site and a large area of concrete anti-cracking floor are rolled and vibrated under the rolling of the rolling ring 12. Then the limiting ring 14 moves upward through the upper fixed rod 112. Under the gravity of the vehicle head 4 and the rotation push of the roller 3, the limiting ring 14 generates an upward moving force, so that the limiting ring 14 provides a downward extrusion force when it breaks away from the thrust of the upper fixed rod 112, so that the limiting ring 14 can better exert a gravity rolling effect on the construction site, and form a rolling and squeezing phenomenon on the left and right sides under the push of the two inclined fixed rods 112.

[0036] It is necessary to explain that when the curved plate 111 rotates faster following the rotating rod 113, the curved plate 111 is separated from the fixed rod 112 at the moment. Under the rebound force of the fixed rod 112, the limiting ring 14 is likely to generate vibration force when it separates from the curved plate 111, so that the limiting ring 14 drives the rolling ring 12 to vibrate downward, and makes the contact point between the lower end of the rolling ring 12 and the construction site and the large area of concrete anti-cracking floor produce a vibration compaction effect, and the pressing force of the limiting ring 14 on the left and right sides causes the rolling ring 12 to produce a left contact point on the construction site. The forces on the right sides squeeze out any possible stripes, and then produce a rolling and leveling effect on the construction site and the large-area concrete anti-cracking floor construction surface in three directions. Under continuous movement and vibration, the extrusion vibration in three directions reduces the generation of stripes, and the rolling ring 12 always rolls and smoothes the construction site and the large-area concrete anti-cracking floor construction surface during rolling and leveling, and the outer side of the roller 3 can also produce a smoothing effect on the surface of the construction site under the rolling movement force, preventing the upper and lower vibrations from generating stripes and affecting the flatness.

[0037] Among them, the limiting ring 14 is provided with a metal ring 141, a force ring 142, a splicing structure 143 and an arc strip 144, the arc strip 144 is embedded between the force ring 142 and the metal ring 141, and there are two splicing structures 143. The splicing structure 143 is embedded between every two force rings 142 and makes the force ring 142 form a circle. The metal ring 141 is arranged on the inner side of the rolling ring 12, and the force ring 142 is arranged on the inner side of the metal ring 141, and the inner side of the force ring 142 is provided with two annular indented grooves, and the three fixing rods 112 slide correspondingly in the grooves of the force ring 142.

[0038] In addition, the arc bar 144 is a positive magnet, and the arc bar 144 is sleeved on the outside of the metal ring 141 to provide a lateral blocking force for the metal ring 141, and keep the force ring 142 and the metal ring 141 in a fixed state, and then the splicing structure 143 engages between every two force rings 142, so that the four force rings 142 and the four metal rings 141 form a circle that is evenly distributed in an annular shape through the four splicing structures 143. At the same time, the splicing structure 143 is adsorbed on the arc bar 144, and the circle formed by the splicing structure 143 is kept fixed. The inner side of the rolling ring 12 is threadedly rotated on the outer side of the splicing structure 143, so that the inner layer of the rolling ring 12 remains fixed on the outside of the force ring 142.

[0039] Among them, the splicing structure 143 is provided with a threaded bar 431, a snap-fit bar 432, a magnetic block 433 and a splicing bar 434. The threaded bar 431 is evenly arranged on the outside of the splicing bar 434, and the snap-fit bar 432 is symmetrically distributed on both sides of the splicing bar 434. The snap-fit bar 432 is provided with a magnetic block 433. The side of the force ring 142 and the metal ring 141 is provided with a square gap corresponding to the splicing structure 143. The snap-fit bar 432 slides in the square gap and makes the magnetic block 433 adsorb and fit to the side of the corresponding arc bar 144.

[0040] The cam 432 is then pulled out of engagement with the metal ring 141 and the cam 433 is then pulled out of engagement with the metal ring 141.

[0041] Among them, the fixed rod 112 is provided with a sliding cylinder 21, a movable ring 22 and a support rod 23. The movable ring 22 is arranged on the outside of the support rod 23, and the sliding cylinder 21 is arranged on the outside of the movable ring 22. The sliding cylinder 21 presses the movable ring 22 with the support rod 23 as the center. There are two sliding cylinders 21 and two movable rings 22 respectively, and the sliding cylinder 21 slides corresponding to the two grooves on the force ring 142. The support rod 23 is arranged on the side of the support plate 15.

[0042] Moreover, when one of the fixing rods 112 squeezes the limiting ring 14, the other two fixing rods 112 will not break away from the groove on the force ring 142 inside the limiting ring 14, so that the limiting ring 14 is always limited to move in the groove. The rolling ring 12 is provided with an inner and outer layer. The inner layer and the metal ring 141 are connected and fixed to each other. A ball is provided between the inner and outer layers to reduce the friction of the outer layer of the rolling ring 12 when rolling on the road surface. Under the active force of the limiting ring 14, the outer layer of the rolling ring 12 only needs to vibrate and roll to smooth it, and does not need to generate a large friction with the surface of the construction site, so as to prevent excessive friction from damaging the flatness of the surface of the construction site.

[0043] In addition, the movable ring 22 is made of rubber and has a hollow structure inside. The arc plate 111 is squeezed against the two sliding cylinders 21, so that the sliding cylinders 21 drive the limit ring 14 and rebound quickly under the elastic force of the movable ring 22. When the arc plate 111 is separated from the fixed rod 112, the fixed rod 112 produces a vibration effect on the limit ring 14.

[0044] In the present invention, the controller 2 controls the movement of the roller 3 and pushes the vibrator 1 at the lower end of the vehicle head 4 to roll and level the construction site and a large area of concrete anti-cracking floor. The output end of the motor 13 controls the rotation of the rotating mechanism 11 by an electrical signal. When the rotating rod 113 in the rotating mechanism 11 rotates, the arc plate 111 squeezes the fixed rod 112, and forms a vibration rolling effect of the rolling ring 12 in three directions of the left and right sides and the bottom through the limiting ring 14. Three-directional forces are formed at the contact points of the rolling ring 12 with the construction site and the large area of concrete anti-cracking floor. The extrusion force on the left and right sides generated by the rolling ring 12 squeezes and levels the possible stripes, so that the contact points of the rolling ring 12 with the construction site and the large area of concrete anti-cracking floor always remain flat during the rolling and translation process, preventing the upper and lower vibrations from generating stripes and affecting the leveling.

[0045] The above description is merely a preferred embodiment of the present invention and therefore cannot be used to limit the scope of the present invention. In other words, equivalent changes and modifications made according to the scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A large area concrete anti-cracking floor, which needs to be constructed on the construction site, characterized in that: The invention comprises a gravel cushion layer (33), a first crushed stone base layer (31), a second crushed stone base layer (32) and a concrete pavement (34), wherein geogrids (301) are provided on the upper and lower sides of the gravel cushion layer (33), and the geogrids (301) wrap and shape the gravel cushion layer (33), wherein the first crushed stone base layer (32) is located at the upper end of the geogrid (301) on the upper side of the gravel cushion layer (33), and the second crushed stone base layer (31) is provided at the upper end of the first crushed stone base layer (32), and the concrete pavement (34) is located at the upper end of the second crushed stone base layer (31).

2. A large area concrete anti-cracking floor according to claim 1, characterized in that: The overlap width of the geogrid (301) is greater than 100 mm, and steel nails (302) are provided at the overlap positions for fixing. The steel nails (302) are U-shaped, and the fixing depth of the steel nails (302) is greater than 100 mm, and the fixing width is less than 2000 mm. The staggered distance of the overlapping cross positions between the geogrids (301) is greater than 1000 mm.

3. A construction method for a large area concrete anti-cracking floor, applied to a large area concrete anti-cracking floor according to claim 2, characterized in that: The specific construction method steps are as follows: S1: Surveyors survey and lay out the construction site, using a total station to place elevation control points. They then use an excavator to perform preliminary leveling of the construction site. After the site is initially leveled, a roller compacts the base 6 to 8 times. S2: The geogrid (301) is manually laid on the surface of the construction site, the long sides of the geogrid (301) are overlapped, and the short sides are alternately overlapped, thereby releasing the elevation control points. An excavator is used in conjunction with a loader or a paver to spread graded sand and gravel on the geogrid (301) of the construction site according to the elevation control points, and a gravel cushion layer (33) is formed. The gravel cushion layer (33) is then rolled and leveled by a roller, and the geogrid (301) is laid again on the surface of the leveled gravel cushion layer (33); S3: The first crushed stone base layer (32) and the second crushed stone base layer (31) are sequentially spread on the gravel cushion layer (33), and the first crushed stone base layer (32) and the second crushed stone base layer (31) are mixed with concrete and evenly stirred before being spread; S4: The above steps require leveling the first crushed stone base (32) and the second crushed stone base (31) according to the elevation control point. The initial leveling is performed using an excavator or a loader, and then the leveling is performed using a scraper. Finally, a concrete pavement (34) is poured on the surface of the second crushed stone base (31), and the concrete pavement (34) is leveled to a flatness of less than 12 mm.

4. The construction method of a large-area concrete anti-cracking floor according to claim 3, wherein a roller is required for rolling and leveling the construction site and the large-area concrete anti-cracking floor, and is characterized in that: The road roller comprises a vibrator (1), a controller (2), a roller (3), a vehicle head (4) and a vehicle body (5), wherein the roller (3) is arranged at the lower end of the vehicle body (5), and an electrical signal of the roller (3) is connected to the controller (2), a hydraulic steering system is arranged in the vehicle head (4), and a hydraulic steering cylinder in the hydraulic steering system is connected to the right middle position of the vehicle body (5) through bolts, the controller (2) is arranged at the oblique side of the vehicle head (4), and drives the roller (3) to rotate and move through an electrical signal of the controller (2), the vibrator (1) is arranged at the lower end of the vehicle head (4), and the controller (2) sends an electrical signal through a circuit to drive the vibrator (1) to roll and level the construction site and the gravel cushion layer (33).

5. A large-area concrete anti-cracking floor and its construction method according to claim 4, characterized in that: The vibrator (1) is provided with a rotating mechanism (11), a rolling ring (12), a motor (13), a limiting ring (14) and a support plate (15). Two support plates (15) are provided and are horizontally distributed on both sides of the lower end of the vehicle head (4). The two support plates (15) are respectively provided with motors (13). The left and right ends of the rotating mechanism (11) are respectively provided at the output ends of the two motors (13), and the rotating mechanism (11) is synchronously driven to rotate by the two motors (13). The limiting ring (14) is provided inside the rolling ring (12). When the rotating mechanism (11) rotates inside the limiting ring (14), the rotating mechanism (11) presses and vibrates against the lower right and lower left corners of the limiting ring (14), thereby driving the rolling ring (12) to tilt and vibrate on the construction site and the gravel cushion layer (33).

6. A large-area concrete anti-cracking floor and its construction method according to claim 5, characterized in that: The rotating mechanism (11) is provided with an arc plate (111), a fixed rod (112) and a rotating rod (113). The arc plate (111) is provided on the outside of the rotating rod (113). The fixed rod (112) is provided with three arc plates (111) which are annularly distributed and fixed on the side of the support plate (15). The rotating rod (113) is provided at the output end of the motor (13). When the rotating rod (113) rotates clockwise, the arc plate (111) pushes the outside of the fixed rod (112) to press the limiting ring (14), thereby driving the rolling ring (12) to roll toward the lower right and lower left in sequence.

7. A large-area concrete anti-cracking floor and its construction method according to claim 6, characterized in that: The limiting ring (14) is provided with a metal ring (141), a stress ring (142), a splicing structure (143) and an arc strip (144), wherein the arc strip (144) is embedded between the stress ring (142) and the metal ring (141), two splicing structures (143) are provided, and the splicing structure (143) is embedded between every two stress rings (142) and makes the stress ring (142) form a circle, the metal ring (141) is provided on the inner side of the rolling ring (12), the stress ring (142) is provided on the inner side of the metal ring (141), and two annular indented grooves are provided on the inner side of the stress ring (142), and the three fixing rods (112) slide correspondingly in the grooves of the stress ring (142).

8. A large-area concrete anti-cracking floor and its construction method according to claim 7, characterized in that: The splicing structure (143) is provided with a threaded strip (431), a snap-fit strip (432), a magnetic block (433) and a splicing strip (434); the threaded strip (431) is evenly arranged on the outside of the splicing strip (434); the snap-fit strip (432) is symmetrically distributed on both sides of the splicing strip (434); the magnetic block (433) is provided on the snap-fit strip (432); a square gap corresponding to the splicing structure (143) is provided on the side of the force ring (142) and the metal ring (141); the snap-fit strip (432) slides in the square gap and causes the magnetic block (433) to be adsorbed and fitted to the side of the corresponding arc strip (144).

9. A large-area concrete anti-cracking floor and its construction method according to claim 8, characterized in that: The fixed rod (112) is provided with a sliding cylinder (21), a movable ring (22) and a support rod (23), the movable ring (22) is provided outside the support rod (23), the sliding cylinder (21) is provided outside the movable ring (22), the sliding cylinder (21) presses the movable ring (22) with the support rod (23) as the center, the sliding cylinder (21) and the movable ring (22) are respectively provided with two, and the sliding cylinder (21) slides in two grooves corresponding to the force ring (142), and the support rod (23) is provided on the side of the support plate (15).

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