Device and method for detecting impermeability of precast concrete channel entity

Abstract

The invention discloses a precast concrete channel entity anti-permeability performance detection device and method, and the detection device comprises a left baffle plate, a right baffle plate, a telescopic bottom plate, and a loading plate. The telescopic bottom plate comprises a left bottom plate body and a right bottom plate body, the left bottom plate body and the right bottom plate body are each provided with a plurality of transversely-distributed fixing strips, a vacancy is formed between every two adjacent fixing strips, all the fixing strips of the left bottom plate body are in one-to-one correspondence with all the vacancies of the right bottom plate body, and all the fixing strips of the right bottom plate body are in one-to-one correspondence with all the vacancies of the left bottom plate body. All the fixing strips are inserted along the corresponding vacancies, so that the left bottom plate and the right bottom plate form a telescopic structure; a plurality of rotatable rollers are arranged on the lower surface of the loading plate, and all the rollers roll between the loading plate and the corresponding fixing strips; the left baffle and the right baffle are located at the two ends of the telescopic bottom plate respectively. According to the invention, the quality detection of the precast concrete channel is enhanced, and the channel engineering quality is improved.

Description

Technical Field

[0001] This invention relates to the field of precast concrete testing technology, specifically to a device and method for testing the impermeability of precast concrete channels. Background Technology

[0002] The application of precast concrete components (such as channels, drainage pipes, and small slabs) in farmland irrigation projects is increasing, with promising prospects. The quality inspection and construction of precast concrete drainage pipes have well-established standards and specifications, and the construction technology and testing methods for precast concrete small slabs are also relatively mature. In contrast, when precast concrete channels are used for farmland irrigation projects, they not only need to meet strength requirements but also possess strong stability and safety. Among these, impermeability directly affects irrigation water quality and the project's service life.

[0003] However, current methods for testing the impermeability of precast concrete channels rely primarily on concrete mixture impermeability test blocks or core-wrapped test blocks. There is a lack of equipment and methods specifically for testing the impermeability of the actual precast concrete channel structure, severely limiting the evaluation of channel engineering impermeability. With the increasing investment in farmland irrigation projects, especially the advancement of key small-scale farmland irrigation county construction, the demand for precast concrete channels continues to rise. To ensure the quality of farmland irrigation projects, it is urgent to develop equipment and methods for testing the impermeability of the actual precast concrete channel structure, thereby solving the long-standing problem of channel quality control. Summary of the Invention

[0004] In order to address the shortcomings of existing technologies and improve the quality of precast concrete channels, this paper proposes measures to enhance the quality inspection of precast concrete channels and improve the overall quality of channel engineering. This invention provides a device for testing the impermeability of a precast concrete channel, comprising a left baffle, a right baffle, a telescopic base plate, and a load-bearing plate. The left or right baffle is equipped with a drainage pipe. The telescopic base plate includes a left base plate and a right base plate, each with multiple horizontally distributed fixing strips. A gap is formed between each pair of adjacent fixing strips, and all fixing strips on the left base plate correspond one-to-one with all gaps on the right base plate, and vice versa. By inserting all the fixing strips along the corresponding gaps, the left and right base plates form a telescopic structure. The lower surface of the load-bearing plate is equipped with multiple rotatable rollers, all of which roll between the load-bearing plate and the corresponding fixing strips. The left and right baffles are located at opposite ends of the telescopic base plate, clamping the concrete channel placed on the load-bearing plate and sealing the openings at both ends of the concrete channel. Both the left and right baffles are higher than the top of the concrete channel.

[0005] The beneficial effects of this equipment are:

[0006] 1. The length of the precast concrete channel is made according to actual needs, and the length of the telescopic base plate is adjustable. It is suitable for precast concrete channels of different lengths, with strong versatility and few inspection restrictions.

[0007] 2. The weight of the precast concrete channel is used to press on the load-bearing plate and the telescopic base plate, while the left and right base plates can reduce frictional resistance through rollers. The left and right baffles require less power to clamp the precast concrete channel, making the operation simpler.

[0008] 3. The entire testing device is custom-designed for precast concrete channels, ensuring accurate and reliable quality testing. This helps to avoid the lack of effective testing techniques for the impermeability of precast concrete channels during factory production and construction quality control, which could negatively impact the quality of the channel project.

[0009] Preferably, the left and right baffles are tightened together by multiple tie rods, each with a nut at both ends. Each nut is located on the outside of the left or right baffle, and tightening the nut will clamp the two ends of the precast concrete channel together.

[0010] Preferably, there are four tie rods, two of which are located on the upper part of the left baffle and the other two are located on the lower part of the left baffle. The two lower tie rods both penetrate the telescopic bottom plate, and the four tie rods are arranged in a rectangular shape. The four tie rods can clamp the upper left and right sides and the lower left and right sides of the precast concrete channel, with uniform clamping force distribution, good clamping effect, and tight sealing without leakage.

[0011] Preferably, both the inner sides of the left and right baffles are provided with sealing gaskets for sealing the openings of the concrete channel. The sealing gaskets are made of rubber, and when compressed, they fill the gaps between the left baffle and the concrete channel, as well as between the right baffle and the concrete channel, further improving the test sealing performance.

[0012] Preferably, the central shaft of each roller is rotatably connected to the lower surface of the load-bearing plate via a fork arm, and each fork arm is provided with a through hole for the central shaft to pass through, and the through hole extends longitudinally, thereby allowing the roller to move up and down relative to the fork arm. Since the concrete channel itself is very heavy, after it is placed on the load-bearing plate, the roller moves upward by its central shaft so that the roller itself is pressed against the load-bearing plate and the fixing bar, rather than the central bearing, thus avoiding damage due to insufficient strength of the central shaft and improving the load-bearing capacity of the load-bearing plate.

[0013] Preferably, the upper surface of each fixing bar is provided with a downward groove adapted to the roller, and the downward groove extends along the length of the fixing bar. The lower surface of the load-bearing plate is provided with an upper groove corresponding to each of the downward grooves, and each roller rolls between the corresponding upper groove and downward groove. The roller is restricted by the central shaft, the downward groove, and the upper groove, and can only roll along the groove without deviating, ensuring the normal extension and retraction function of the telescopic base plate.

[0014] This invention also provides a method for testing the impermeability of precast concrete channel bodies, applied to the aforementioned testing device for the impermeability of precast concrete channel bodies, comprising the following steps:

[0015] S1. Hoist the concrete channel onto the load-bearing plate, with the openings at both ends of the concrete channel facing the left and right ends of the load-bearing plate, respectively. S2. Place the left and right baffles perpendicularly against the left and right ends of the telescopic base plate, respectively, with the two ends of the load-bearing plate directly opposite the left and right baffles, respectively. S3. Tighten all the nuts on the tie rods. During tightening, the left and right base plates move relative to each other via rollers, and the distance between the left and right baffles decreases until the two sealing gaskets are pressed against the openings at both ends of the concrete channel. S4. Fill the concrete channel with water and let it stand for 24 hours. S5. Carefully observe the outer wall and surrounding area of ​​the concrete channel to check for any leakage. S6. If there is no leakage, the product is qualified. If there is leakage, calculate the area of ​​the seepage using the 100-grid method. The specific calculation method is to divide the observed leakage area into several grid cells of equal area, record the leakage situation of each grid cell, and count the total area of ​​the leaking grid cells to obtain the total area of ​​the seepage. The test is complete. Open the drain pipe to drain the water.

[0016] The beneficial effects of this method are as follows: it can not only check whether the concrete channel is up to standard, but also calculate the permeability based on the leakage area, allowing for the selection of products with appropriate permeability according to project requirements. For example, if the average value is less than 5% of the channel's outer wall area, and the project requires a maximum permeability of 6%, then the anti-seepage performance is considered qualified; otherwise, it is considered unqualified. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0019] Figure 2 for Figure 1 A schematic diagram showing the precast concrete channel after it has been clamped in place.

[0020] Figure 3 for Figure 2 Sectional view along the middle AA direction;

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 This is a schematic diagram of the telescopic base plate in this embodiment;

[0023] Figure 6 for Figure 5 A schematic diagram after adding rollers;

[0024] Figure 7 for Figure 6 A schematic diagram of the extended telescopic base plate.

[0025] In the attached diagram, the components are: left baffle 1, right baffle 2, telescopic base plate 3, load-bearing plate 4, precast concrete channel 5, left base plate 6, right base plate 7, fixing strip 8, empty space 9, roller 10, central shaft 11, fork arm 12, through hole 13, downward channel 14, upper channel 15, tie rod 16, nut 17, sealing gasket 18, and drain pipe 19. Detailed Implementation

[0026] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0027] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0028] like Figure 1 As shown, this embodiment provides a device for testing the impermeability of a precast concrete channel, including a left baffle 1, a right baffle 2, a telescopic base plate 3, and a load-bearing plate 4. A drainage pipe 19 is provided on the right baffle 2, or alternatively on the left baffle 1; this embodiment does not impose any limitation. The specific structure of the telescopic base plate 3 is as follows:

[0029] like Figures 5 to 7 As shown, the telescopic base plate 3 includes a left base plate 6 and a right base plate 7. Both the left and right base plates 6 and 7 are provided with four laterally distributed fixing strips 8, but not limited to four; there can also be five, six, etc., depending on the longitudinal dimensions of the telescopic base plate 3. A gap 9 is formed between each pair of adjacent fixing strips 8, and all fixing strips 8 of the left base plate 6 are aligned with all gaps 9 of the right base plate 7, and vice versa. By inserting all the fixing strips 8 along the corresponding gaps 9, the left and right base plates 6 and 7 form a telescopic structure.

[0030] like Figure 3 , Figure 4As shown, in this embodiment, the load-bearing plate 4 is pressed onto the telescopic base plate 3, which can be placed on a smooth surface. The smooth surface has low friction, reducing the frictional resistance of the telescopic base plate 3 during its extension and retraction. Multiple rotatable rollers 10 are provided on the lower surface of the load-bearing plate 4, and all rollers 10 roll between the load-bearing plate 4 and the corresponding fixing strip 8. Specifically, the central shaft 11 of each roller 10 is rotatably connected to the lower surface of the load-bearing plate 4 via a fork arm 12, and each fork arm 12 has a through hole 13 for the central shaft 11 to pass through. The through hole 13 extends longitudinally, allowing the roller 10 to move up and down relative to the fork arm 12. Because the concrete channel itself is heavy, after it is placed on the load-bearing plate 4, the pressure is borne by the central shaft 11 of the roller 10, which moves upwards so that the roller 10 itself is between the load-bearing plate 4 and the fixing strip 8, rather than the central shaft 11. This avoids damage due to insufficient strength of the central shaft 11 and improves the load-bearing capacity of the load-bearing plate 4. Furthermore, each fixing bar 8 has a descending groove 14 on its upper surface that is adapted to the roller 10, and the descending groove 14 extends along the length of the fixing bar 8. The lower surface of the load-bearing plate 4 has an upper groove 15 that corresponds one-to-one with all the descending grooves 14, and each roller 10 rolls between the corresponding upper groove 15 and descending groove 14. The roller 10 is restricted by the central shaft 11, the descending groove 14 and the upper groove, and it can only roll along the groove without deviating, ensuring the normal extension and retraction function of the telescopic base plate 3.

[0031] like Figure 2 , Figure 3 As shown, in this embodiment, the left baffle 1 and right baffle 2 are located at both ends of the telescopic base plate 3. The left baffle 1 and right baffle 2 clamp the concrete channel placed on the load-bearing plate 4, thereby sealing the openings at both ends of the concrete channel. Both the left baffle 1 and right baffle 2 are higher than the top of the concrete channel. The specific clamping method is as follows:

[0032] Four tie rods 16 are used to tighten the left baffle 1 and right baffle 2, with nuts 17 at both ends of each tie rod 16. Each nut 17 is located on the outside of the left baffle 1 or right baffle 2. Tightening the nuts 17 clamps the two ends of the precast concrete channel 5 between the left baffle 1 and right baffle 2. Two tie rods 16 are located on the upper part of the left baffle 1, and the other two tie rods 16 are located on the lower part of the left baffle 1. The two tie rods 16 at the bottom both penetrate the telescopic base plate 3. The four tie rods 16 are arranged in a rectangular shape. The four tie rods 16 can clamp the upper left and right sides and the lower left and right sides of the precast concrete channel 5. The clamping force is evenly distributed, the clamping effect is good, and the seal is tight and leak-free.

[0033] The assembly method of the testing device is simple: the precast concrete channel 5 is pressed onto the load-bearing plate 4, and then all the nuts 17 are slowly tightened, so that the left baffle 1 and the right baffle 2 are pressed against the openings at both ends of the concrete channel, thereby forming a sealed test space with the upper opening inside the precast concrete channel 5. To improve the sealing effect, sealing gaskets 18 are provided on the inner side of the left baffle 1 and the inner side of the right baffle 2 to seal the openings of the concrete channel. The sealing gaskets 18 are made of rubber. After being compressed, the sealing gaskets 18 fill the gaps between the left baffle 1 and the concrete channel, and between the right baffle 2 and the concrete channel, further improving the test sealing performance.

[0034] The testing method in this embodiment is as follows:

[0035] The concrete channel is hoisted and placed on the load-bearing plate 4, with the openings at both ends of the concrete channel facing the left and right ends of the load-bearing plate 4, respectively. The left baffle 1 and right baffle 2 are placed vertically against the left and right ends of the telescopic base plate 3, respectively, with the two ends of the load-bearing plate 4 directly opposite the left baffle 1 and right baffle 2. All nuts 17 on the tie rods 16 are tightened. During tightening, the left base plate 6 and right base plate 7 move relative to each other via rollers, and the distance between the left baffle 1 and right baffle 2 decreases until the two sealing gaskets 18 are pressed against the openings at both ends of the concrete channel. The concrete channel is filled with water and left to stand for 24 hours. The outer wall and surrounding area of ​​the concrete channel are carefully observed to check for leaks. If there are no leaks, the product is qualified; if there are leaks, the area of ​​the leaking portion is calculated using the grid method. Specifically, the observed leaking area is divided into several grid cells of equal area, the leaking condition of each grid cell is recorded, and the total area of ​​the leaking grid cells is calculated to obtain the total area of ​​the leaking portion. The test is complete. Open the drain pipe to drain the water.

[0036] The testing device and method in this embodiment are customized for precast concrete channel 5. The quality inspection is accurate and reliable, which helps to avoid the lack of effective testing technology for the impermeability of precast concrete channel 5 during the factory and construction quality control process, which would affect the quality of the channel project.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A device for testing the impermeability of precast concrete channel bodies; characterized in that: It includes a left baffle, a right baffle, a telescopic base plate, and a load-bearing plate; the left or right baffle is equipped with a drain pipe; the telescopic base plate includes a left base plate and a right base plate, both of which are provided with multiple horizontally distributed fixing strips, with a gap formed between each two adjacent fixing strips, and all fixing strips of the left base plate are aligned with all gaps of the right base plate, and all fixing strips of the right base plate are aligned with all gaps of the left base plate. By inserting all the fixing strips along the corresponding gaps, the left and right base plates form a telescopic structure. The lower surface of the load-bearing plate is provided with multiple rotatable rollers, and all rollers roll between the load-bearing plate and the corresponding fixing strip. The left and right baffles are located at both ends of the telescopic base plate. The left and right baffles clamp the concrete channel placed on the load plate, thereby sealing the openings at both ends of the concrete channel. Both the left and right baffles are higher than the top of the concrete channel.

2. The device for testing the impermeability of a precast concrete channel according to claim 1, characterized in that: The left and right baffles are held together by multiple tie rods.

3. The device for testing the impermeability of a precast concrete channel according to claim 2, characterized in that: The system has four pull rods, with two rods located on the upper part of the left baffle and the other two rods located on the lower part of the left baffle, and the four pull rods are arranged in a rectangular shape.

4. The device for testing the impermeability of a precast concrete channel according to claim 3, characterized in that: The two tie rods at the bottom both penetrate the telescopic base plate.

5. The device for testing the impermeability of a precast concrete channel according to claim 3, characterized in that: Each pull rod has nuts at both ends.

6. The device for testing the impermeability of a precast concrete channel according to claim 5, characterized in that: The inner sides of both the left and right baffles are provided with sealing gaskets for sealing the openings of the concrete channel.

7. The device for testing the impermeability of a precast concrete channel according to claim 1, characterized in that: The central axis of each roller is rotatably connected to the lower surface of the load plate via a fork arm, and each fork arm is provided with a through hole for the central axis to pass through, and the through hole extends longitudinally, thereby allowing the roller to move up and down relative to the fork arm.

8. The device for testing the impermeability of a precast concrete channel according to claim 1, characterized in that: Each fixing bar has a downward groove on its upper surface that is adapted to the roller, and the downward groove extends along the length of the fixing bar.

9. The device for testing the impermeability of a precast concrete channel according to claim 8, characterized in that: The lower surface of the load-bearing plate is provided with an upper groove that corresponds one-to-one with all the downward grooves, and each roller rolls between the corresponding upper groove and downward groove.

10. A method for testing the impermeability of a precast concrete channel, characterized in that: The steps for applying the precast concrete channel solid impermeability testing device as described in claim 6 are as follows: S1. Hoist the concrete channel onto the load-bearing plate, with the openings at both ends of the concrete channel facing the left and right ends of the load-bearing plate, respectively. S2. Place the left and right baffles perpendicularly against the left and right ends of the telescopic base plate, respectively, with the two ends of the load-bearing plate directly opposite the left and right baffles. S3. Tighten all the nuts on the tie rods. During the tightening process, the left and right bottom plates move relative to each other through the rollers and the distance between the left and right baffles decreases until the two sealing gaskets are pressed against the openings at both ends of the concrete channel. S4. Fill the concrete channel with water and let it stand for 24 hours. S5. Carefully observe the outer wall and surrounding area of ​​the concrete channel to check for any leakage. S6. If there is no leakage, the product is qualified; if there is leakage, use the 100-grid method to calculate the area of ​​the leaking part. S7. Test complete. Open the drain pipe to drain water.

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