Joint cutting method for large-area field concrete

Abstract

The invention discloses a joint cutting method for large-area field concrete, which comprises the following steps: S1, positioning and paying off, namely partitioning a large-area field according to the pouring requirements of concrete with different thicknesses, S2, pouring concrete, namely pouring the concrete into the field according to the partitioning to form entities with different thicknesses, and S3, judging the strength of the concrete. S5, preparing the device, adjusting the distance from the bottom of a joint cutter to the bottom of the longitudinal frame according to the required joint cutting depth, namely, sliding the mounting plate to a corresponding position, locking the mounting plate by adopting a locking mechanism, and locking the mounting plate by adopting a locking mechanism, so that the joint cutting depth is one third of the thickness of the cement concrete pavement to be subjected to joint cutting. The method comprises the following steps: S1, mounting a mounting plate in a large field floor, and firmly fixing the mounting plate by adopting bolts, S6, concrete joint cutting, and S7, joint cleaning, namely cleaning garbage falling in a joint in the joint cutting process, and performing joint cutting treatment of different depths according to different concrete pouring requirements of different partitions of the large field floor by adopting a joint cutting device.

Description

Technical Field

[0001] The invention relates to the technical field of road construction, and more specifically to a method for cutting seams of large-area field concrete. Background Art

[0002] During the construction process, when a large area of ​​ground is involved, during the process of concrete setting and hardening, cement hydration releases a lot of heat, causing the concrete temperature to rise. After most of the cement hydration reactions are completed, the concrete temperature begins to drop. During the cooling process, the concrete has already set and hardened. The shrinkage caused by the cooling will cause the concrete to crack, and the direction of the cracks is relatively random, which seriously affects the quality and service life of the road surface and floor. Therefore, the concrete needs to be cut before it is completely solidified after pouring.

[0003] Different partitions of a large area often have different requirements for concrete pouring, that is, different partitions require different pouring thicknesses. Therefore, a method for cutting seams in large area concrete is proposed according to different needs. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to propose a method for cutting seams in large-area field concrete, which adopts a cutting device with adjustable cutting depth to perform cutting treatments of different depths according to different concrete pouring requirements of different partitions of the large field.

[0005] To achieve the above object, the present invention provides the following technical solutions: A method for cutting seams in large-area field concrete comprises the following steps: S1. Positioning and laying out, dividing the large area into blocks according to the requirements of concrete pouring of different thicknesses; S2. Concrete pouring: pour concrete on the field according to the blocks to form entities of different thicknesses; S3. Determine the strength of concrete and judge the degree of solidification of concrete, that is, cut the joints after the initial setting and before the final setting of concrete; S4. Using a cutting device to cut concrete of different thicknesses, the cutting depth is one-third of the thickness of the cement concrete pavement to be cut; The slitting device comprises a cross frame, a longitudinal frame 1 and a longitudinal frame 2 are symmetrically arranged at the bottom positions of both ends of the cross frame, and the inner walls of the longitudinal frame 1 and the longitudinal frame 2 are correspondingly provided with a vertical slide groove 1 and a slide groove 2, and the lower ends of the two slide grooves extend to the outside of the two longitudinal frames, and a mounting plate is slidably mounted in the slide groove 1 and the slide groove 2, and a detachable slitting knife is arranged on the lower bottom surface of the mounting plate, and a handle is fixed at the middle position of the upper top surface of the cross frame, and the angle between the handle and the cross frame is 30°~45°, and a locking mechanism is arranged between the side wall of the mounting plate and the slide groove 1, and a vertical through groove is arranged at the bottom of the groove of the slide groove 2, and the mounting plate and the longitudinal frame 2 are fixedly connected by bolt 1, and bolt holes are arranged on the side walls corresponding to the mounting plate and the through groove, and when the mounting plate slides to the corresponding position, the bolt 1 passes through the through groove and is fixed in the bolt hole, and the head of the bolt 1 is tightly against the outer wall of the longitudinal frame 2, and the distance from the bottom of the slitting knife to the bottom of the longitudinal frame is the slitting depth of the concrete; S5. Prepare the device, adjust the distance from the bottom of the slitting knife to the bottom of the vertical frame according to the required slitting depth, slide the mounting plate to the corresponding position, lock the mounting plate with a locking mechanism, and secure the mounting plate with a bolt; S6. Concrete cutting; S7. Clean the seams, and clean up the garbage dropped into the seams during the cutting process.

[0006] The present invention is further configured as follows: the locking mechanism includes a mounting groove provided on an outer side wall of a longitudinal frame, a limiting ring is installed at the opening of the mounting groove, a horizontal through hole is provided at the bottom of the mounting groove, a limiting rod is passed through the mounting groove, the outer end of the limiting rod passes through the limiting ring to fix a pull plate, and the inner end of the limiting rod passes through the through hole, a baffle is provided on the limiting rod at a position at the bottom of the mounting groove, a spring is provided on the limiting rod between the baffle and the baffle ring, a plurality of slots are arranged in the vertical direction on the side walls corresponding to the mounting plate and the inner end of the limiting rod, and under the action of the spring, the inner end of the limiting rod is clamped in the corresponding slot.

[0007] The present invention is further configured as follows: a fixing groove matched with the upper part of the slitting knife is opened on the bottom surface of the mounting plate, the upper part of the slitting knife is clamped in the fixing groove, and the slitting knife and the mounting plate are fixedly mounted by bolts.

[0008] The present invention is further configured as follows: a ruler is marked on the side wall of the slitting knife to display the distance from the bottom of the slitting knife to the bottom ends of the two vertical frames.

[0009] The present invention is further configured as follows: the handle is configured as a telescopic handle, and the lower end of the telescopic handle is fixed to the cross frame, and the upper end of the telescopic handle is connected to a driving vehicle, and the driving vehicle is used to drive the slitting device to move.

[0010] The present invention is further configured as follows: in S3, a concrete digital rebound tester is used to determine the degree of solidification of concrete.

[0011] The present invention is further configured as follows: when cutting in S6, the concrete is divided and cut every 4 to 6 m in the horizontal direction.

[0012] In summary, the present invention has the following beneficial effects: By adopting a cutting device with adjustable cutting depth, different cutting depths can be carried out according to the different concrete pouring requirements of different partitions of the large field. The slitting depth of the slitting knife can be adjusted by moving the mounting plate in the slide slot of the slitting device and cooperating with the locking mechanism and the bolt. When the slitting depth needs to be adjusted, it is only necessary to loosen the bolt and pull the pull plate, move the mounting plate to a suitable position, and then loosen the pull plate. Under the action of the spring, the limiting rod is limited and installed in the corresponding slot, and the mounting plate is further fixed by tightening the bolt. The two sides of the mounting plate are fixed in different ways. The locking mechanism is relatively easy to operate and the bolt fixation is relatively firm. The combination of the two ensures both the firmness of the fixation and the convenience of adjustment. By using a driving vehicle to drive the slitting device, labor can be reduced and the degree of automation can be improved, which is also more suitable for use in large areas. A telescopic handle is connected to the slitting device, and the cutting depth of the slitting knife can be coordinated by adjusting the telescopic handle; By using a digital concrete rebound tester to judge the degree of solidification of concrete, it can ensure that the concrete is cut at the appropriate time, which can ensure the high quality of the work; By marking a ruler on the side wall of the slitting knife, the distance from the bottom of the slitting knife to the bottom ends of the two vertical frames can be displayed, which is convenient for adjusting the cutting depth of the slitting knife, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of a slitting device; Figure 3 for Figure 2 The enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0014] Figure numerals: 1, horizontal frame; 2, vertical frame one; 3, vertical frame two; 4, slide slot one; 5, slide slot two; 6, mounting plate; 7, slitting knife; 8, handle; 9, through slot; 10, bolt one; 11, bolt hole; 12, mounting slot; 13, limiting ring; 14, through hole; 15, baffle; 16, limiting rod; 17, pull plate; 18, driving car; 19, spring; 20, slot; 21, bolt two. DETAILED DESCRIPTION

[0015] The present invention is described in detail below with reference to the accompanying drawings.

[0016] Embodiment: A method for cutting seams in large-area field concrete, which uses a cutting device with adjustable cutting depth to perform cutting processes of different depths according to different concrete pouring requirements of different partitions of the large field.

[0017] refer to Figure 1 , Figure 2 , including the following steps: S1. Positioning and laying out, dividing the large area into blocks according to the requirements of concrete pouring of different thicknesses; S2. Concrete pouring: pour concrete on the field according to the blocks to form entities of different thicknesses; S3. Determine the strength of concrete and judge the degree of solidification of concrete, that is, cut the joints after the initial setting and before the final setting of concrete; S4. Using a cutting device to cut concrete of different thicknesses, the cutting depth is one-third of the thickness of the cement concrete pavement to be cut; The slitting device comprises a horizontal frame 1, and a vertical frame 1 2 and a vertical frame 2 3 are symmetrically arranged at the bottom positions of both ends of the horizontal frame 1. Figure 3 , Figure 4 A vertical slide groove 1 4 and a vertical slide groove 2 5 are correspondingly arranged on the inner walls of the longitudinal frame 1 2 and the longitudinal frame 2 3. The lower ends of the two slide grooves extend to the outside of the two longitudinal frames. A mounting plate 6 is slidably installed in the slide groove 1 4 and the slide groove 2 5. A detachable slitting knife 7 is arranged on the lower bottom surface of the mounting plate 6. A handle 8 is fixed at the middle position of the top surface of the horizontal frame 1. The angle between the handle 8 and the horizontal frame 1 is 30°~45°. A lock is arranged between the side wall of the mounting plate 6 and the slide groove 1 4. The stop mechanism is provided with a vertical through slot 9 at the bottom of the second slide slot 5, and the mounting plate 6 and the second longitudinal frame 3 are fixedly connected by a bolt 10. Bolt holes 11 are provided on the side walls corresponding to the mounting plate 6 and the through slot 9. When the mounting plate 6 slides to the corresponding position, the bolt 10 passes through the through slot 9 and is fixed in the bolt hole 10, and the head of the bolt 10 is tightly against the outer side wall of the second longitudinal frame 3. The distance from the bottom of the slitting knife 7 to the bottom of the longitudinal frame is the slitting depth of the concrete. S5 preparation device, according to the desired slit depth to adjust the distance from the bottom of the slit knife 7 to the bottom of the longitudinal frame, that is, the mounting plate 6 is slid to the corresponding position, the locking mechanism is used to lock the mounting plate 6, and the mounting plate 6 is firmly fixed with a bolt 10; S6. Concrete cutting; S7. Clean the seams, and clean up the garbage dropped into the seams during the cutting process.

[0018] Combination Figure 3 , Figure 4 The locking mechanism includes a mounting groove 12 provided on the outer side wall of the longitudinal frame 2, a limiting ring 13 is installed at the opening of the mounting groove 12, a horizontal through hole 14 is provided at the bottom of the mounting groove 12, a limiting rod 16 is passed through the mounting groove 12, a pull plate 17 is fixed to the outer end of the limiting rod 16 through the limiting ring 13, and the inner end thereof passes through the through hole 14, a baffle 15 is provided on the limiting rod 16 at the bottom of the mounting groove 12, a spring 19 is sleeved between the baffle 15 and the baffle ring on the limiting rod 16, and a plurality of card slots 20 are arranged in the vertical direction on the side wall corresponding to the mounting plate 6 and the inner end of the limiting rod 16, and under the action of the spring 19, the inner end of the limiting rod 16 is clamped in the corresponding card slot 20. The mounting plate 6 is moved in the slide groove of the slitting device, and the slitting depth of the slitting knife 7 can be adjusted by cooperating with the locking mechanism and the bolt. When the slitting depth needs to be adjusted, it is only necessary to loosen the bolt 10 and pull the pull plate 17, move the mounting plate 6 to a suitable position, and then loosen the pull plate 17. Under the action of the spring 19, the limiting rod 16 is restricted and installed in the corresponding slot 20, and the mounting plate 6 is further fixed by tightening the bolt 10. The two sides of the mounting plate 6 are fixed in different ways. The locking mechanism is relatively easy to operate, and the bolt fixation is relatively firm. The combination of the two ensures both the firmness of the fixation and the convenience of adjustment. A fixing groove matching the upper part of the slitting knife 7 is provided on the bottom surface of the mounting plate 6, the upper part of the slitting knife 7 is clamped in the fixing groove, and the slitting knife 7 and the mounting plate 6 are fixedly installed by bolts 21. This arrangement facilitates the disassembly and replacement of the slitting knife 7.

[0019] refer to Figure 2 A ruler is marked on the side wall of the slitting knife 7 to display the distance from the bottom of the slitting knife 7 to the bottom ends of the two vertical frames. By displaying the distance from the bottom of the slitting knife 7 to the bottom ends of the two vertical frames, it is convenient to adjust the cutting depth of the slitting knife 7, thereby improving work efficiency.

[0020] Combination Figure 1The handle 8 is set as a telescopic handle, and the lower end of the telescopic handle is fixed to the cross frame 1, and the upper end is connected to a driving vehicle 18, which is used to drive the slitting device to move. The driving vehicle 18 is used to drive the slitting device to move, which can reduce labor and improve the degree of automation. It is also more suitable for use in large areas. The telescopic handle is connected to the slitting device, and the cutting depth of the slitting knife 7 can be coordinated by adjusting the telescopic handle, and the driving vehicle 18 has a driving device.

[0021] In S3, a digital concrete rebound tester is used to judge the degree of solidification of concrete, which can ensure that the concrete is cut at the appropriate time and the high quality of the work can be ensured; when cutting in S6, the concrete is divided and cut every 4 to 6 meters in the horizontal direction to ensure an effective cutting effect.

[0022] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A method for cutting seams in large-area field concrete, characterized in that: The steps include: S1. Positioning and laying out, dividing the large area into blocks according to the requirements of concrete pouring of different thicknesses; S2. Concrete pouring: pour concrete on the field according to the blocks to form entities of different thicknesses; S3. Determine the strength of concrete and judge the degree of solidification of concrete, that is, cut the joints after the initial setting and before the final setting of concrete; S4. Using a cutting device to cut concrete of different thicknesses, the cutting depth is one-third of the thickness of the cement concrete pavement to be cut; The slitting device comprises a cross frame, a longitudinal frame 1 and a longitudinal frame 2 are symmetrically arranged at the bottom positions of both ends of the cross frame, and the inner walls of the longitudinal frame 1 and the longitudinal frame 2 are correspondingly provided with a vertical slide groove 1 and a slide groove 2, and the lower ends of the two slide grooves extend to the outside of the two longitudinal frames, and a mounting plate is slidably mounted in the slide groove 1 and the slide groove 2, and a detachable slitting knife is arranged on the lower bottom surface of the mounting plate, and a handle is fixed at the middle position of the upper top surface of the cross frame, and the angle between the handle and the cross frame is 30°~45°, and a locking mechanism is arranged between the side wall of the mounting plate and the slide groove 1, and a vertical through groove is arranged at the bottom of the groove of the slide groove 2, and the mounting plate and the longitudinal frame 2 are fixedly connected by bolt 1, and bolt holes are arranged on the side walls corresponding to the mounting plate and the through groove, and when the mounting plate slides to the corresponding position, the bolt 1 passes through the through groove and is fixed in the bolt hole, and the head of the bolt 1 is tightly against the outer wall of the longitudinal frame 2, and the distance from the bottom of the slitting knife to the bottom of the longitudinal frame is the slitting depth of the concrete; S5. Prepare the device, adjust the distance from the bottom of the slitting knife to the bottom of the vertical frame according to the required slitting depth, slide the mounting plate to the corresponding position, lock the mounting plate with a locking mechanism, and secure the mounting plate with a bolt; S6. Concrete cutting; S7. Clean the seams, and clean up the garbage dropped into the seams during the cutting process.

2. The method for cutting seams of large-area floor concrete according to claim 1 is characterized in that: The locking mechanism includes a mounting groove provided on an outer side wall of a longitudinal frame, a limiting ring is installed at the opening of the mounting groove, a horizontal through hole is provided at the bottom of the mounting groove, a limiting rod is passed through the mounting groove, the outer end of the limiting rod passes through the limiting ring to fix a pull plate, and the inner end of the limiting rod passes through the through hole, a baffle is provided on the limiting rod at the bottom of the mounting groove, a spring is provided on the limiting rod between the baffle and the baffle ring, a plurality of slots are arranged in the vertical direction on the side walls corresponding to the mounting plate and the inner end of the limiting rod, and under the action of the spring, the inner end of the limiting rod is clamped in the corresponding slot.

3. The method for cutting seams of large-area floor concrete according to claim 2 is characterized in that: A fixing groove matched with the upper part of the slitting knife is provided on the bottom surface of the mounting plate, the upper part of the slitting knife is clamped in the fixing groove, and the slitting knife and the mounting plate are fixedly mounted by bolts.

4. The method for cutting seams of large-area floor concrete according to claim 1, characterized in that: A ruler is marked on the side wall of the slitting knife to show the distance from the bottom of the slitting knife to the bottom ends of the two vertical frames.

5. The method for cutting seams of large-area floor concrete according to claim 1 is characterized in that: The handle is configured as a telescopic handle, and the lower end of the telescopic handle is fixed to the horizontal frame, and the upper end of the telescopic handle is connected to a driving vehicle, and the driving vehicle is used to drive the slitting device to move.

6. The method for cutting seams of large-area floor concrete according to claim 1 is characterized in that: In S3, a digital concrete rebound tester is used to determine the degree of concrete solidification.

7. The method for cutting seams of large-area floor concrete according to claim 1 is characterized in that: When cutting in S6, the concrete is divided and cut every 4 to 6 meters in the horizontal direction.

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