A contraction joint cutting device for channel slope protection process and a construction method thereof

Abstract

The present application relates to the technical field of slope stability, and particularly relates to a contraction joint cutting device for channel slope protection technology and a construction method thereof, which reflects concrete strength fluctuation according to a feed speed difference value and a cutting pressure, adjusts a cutting depth and an initial rotating speed according to the feed speed difference value; determines whether the channel slope protection has a concave-convex surface according to changes in the feed pressure and actual rotating speed; determines a concave-convex surface type according to a current feed pressure and a historical feed pressure, and adjusts the cutting depth according to the concave-convex surface type; determines whether a joint slot edge produces edge collapse according to an extracted curvature radius of the joint slot; determines whether the joint slot of the contraction joint is in channel slope protection convex surface edge collapse according to an initial detection period, determines whether the moving speed and the rotating speed of the cutting device are matched, and reduces the initial moving speed or the initial detection period of the cutting device. The present application enhances the anti-deformation ability and stability of the channel slope protection structure through accurate cutting of the contraction joint, and prevents slope landslide or frost heaving damage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slope stability, in particular to a contraction joint cutting device for channel slope protection process and a construction method thereof. BACKGROUND

[0002] Channel slope protection is an important structural form in water conservancy engineering for protecting the channel slope. Its main function is to prevent the damage of the slope caused by water erosion, soil erosion and other factors, so as to ensure the stability and water conveying efficiency of the channel. The cutting of the contraction joint is a key technology in construction, which aims to adapt to the deformation of the slope protection structure caused by temperature changes, concrete shrinkage or foundation settlement, and prevent the generation of cracks.

[0003] Chinese patent publication No. CN112482223A discloses a method for cutting the contraction joint of a bridge guardrail, which relates to the field of bridge construction technology and can overcome the problem of long construction period of the contraction joint. The method comprises the following steps: step one, installing a support module on the bridge deck corresponding to the position of the contraction joint; step two, installing a sliding rail on the support module, which spans the guardrail of the bridge; step three, installing a cutting module on the sliding rail, and installing a power mechanism between the cutting module and the sliding rail to drive the movement of the cutting module, and the cutting head of the cutting module is in contact with the guardrail; step four, adjusting the sliding rail and the cutting module; step five, starting the cutting module and the power mechanism to realize the cutting of the contraction joint from the inside to the outside of the guardrail. Since the support device, sliding rail and cutting module can realize the cutting of the contraction joint of the entire side guardrail at one time, the method has the advantages of fast and accurate cutting of the contraction joint of the guardrail. It can be seen that the method for cutting the contraction joint of the bridge guardrail has the following problems:

[0004] During the cutting process, the deformation force of the contraction joint caused by abnormal tool wear, cutting precision loss of control and cutting vibration cannot be effectively dispersed to the surrounding structure, resulting in cracking and deformation of the contraction joint, affecting the engineering quality and the stability of the channel slope protection. SUMMARY

[0005] Therefore, the present application provides a contraction joint cutting device for channel slope protection process and a construction method thereof to overcome the problem of cracking and deformation of the contraction joint caused by loss of control of cutting precision during the cutting process in the prior art.

[0006] To achieve the above-mentioned purpose, the present application provides a construction method of a contraction joint cutting device for channel slope protection process, which comprises:

[0007] Determining the specific position of the contraction joint that needs to be cut, and starting the contraction joint cutting device to cut the contraction joint of the channel slope protection according to the initial rotating speed, initial feeding speed and initial moving speed;

[0008] The cutting disc is cut into the slope concrete according to the initial rotation speed and the initial feeding speed, the feeding speed difference is calculated, and whether the cutting pressure of the cutting disc conforms to the linear expectation reflects the concrete strength fluctuation, and the cutting depth and the initial rotation speed are adjusted according to the feeding speed difference;

[0009] The feeding pressure and the actual rotation speed of the cutting disc are detected according to the initial detection period, and whether the channel slope has a concave-convex surface is determined according to the changes of the feeding pressure and the actual rotation speed.

[0010] The concave-convex surface type is determined according to the current feeding pressure and the historical feeding pressure, and the cutting depth is adjusted according to the concave-convex surface type.

[0011] The running state of the cutting device is analyzed in real time according to the changes of the actual rotation speed in the initial detection period, and it is judged whether the cutting device has a running risk or needs secondary analysis.

[0012] When the secondary analysis is needed, the slot image generated after the cutting of the channel slope is subjected to image recognition and edge detection according to the initial detection period, and it is judged whether the slot edge is collapsed according to the curvature radius of the extracted slot.

[0013] Whether the slot of the expansion joint is collapsed on the convex surface of the channel slope is determined according to the initial detection period, and whether the moving speed and the rotation speed of the cutting device are matched is determined, and the initial moving speed or the initial detection period of the cutting device is reduced.

[0014] The expansion joint of the channel slope after cutting is subjected to joint cleaning and section finishing, and sealing glue is poured for maintenance.

[0015] Further, the expansion length of the cutting disc in the initial detection period is detected in real time, and the actual feeding speed is calculated.

[0016] The feeding speed difference is calculated according to the actual feeding speed and the initial feeding speed, if the feeding speed difference is greater than the difference evaluation value, and the cutting pressure does not conform to the linear expectation, it is judged that the concrete strength fluctuates, and the initial rotation speed and the cutting depth are adjusted.

[0017] When the actual feeding speed is less than the initial feeding speed, the ratio of the feeding speed difference to the initial feeding speed is taken as the increase amplitude to increase the initial rotation speed, and the cutting depth is increased according to the feeding speed difference and the compensation coefficient.

[0018] Further, the cutting pressure growth amplitude in the initial detection period is calculated according to the cutting pressure among the cutting disc pressures, and when the difference between the cutting pressure growth amplitude and the theoretical growth amplitude is greater than the critical amplitude, it is determined that the cutting pressure does not conform to the linear expectation.

[0019] Further, the process of determining whether there is a concave-convex surface includes,

[0020] a feed pressure variation range is calculated, if the feed pressure variation range is greater than a critical range, and a rotational speed difference between the actual rotational speed of the cutting disc and the initial rotational speed is greater than a standard value, it is determined that the channel protection slope has a concave-convex surface;

[0021] The cutting pressure is the pressure on the cutting disc in the cutting depth direction, and the feed pressure is the pressure on the cutting disc in the moving direction of the cutting device.

[0022] Further, the process of determining the type of concave-convex surface includes,

[0023] When the current feed pressure is greater than the historical feed pressure and the actual rotational speed is less than the initial rotational speed, it is determined that the channel protection slope has a convex surface, and the cutting depth is reduced according to the ratio of the actual rotational speed to the initial rotational speed.

[0024] When the current feed pressure is less than the historical feed pressure and the actual rotational speed is greater than the initial rotational speed, it is determined that the channel protection slope has a concave surface, and the cutting depth is increased according to the ratio of the actual rotational speed to the initial rotational speed.

[0025] The feed pressure detected in the current initial detection period is the current feed pressure, and the feed pressure detected in the previous initial detection period is the historical feed pressure.

[0026] Further, the process of analyzing the running state of the cutting device includes calculating the actual rotational speed variation range according to the variation of the actual rotational speed in the initial detection period.

[0027] If the actual rotational speed variation range is greater than or equal to a variation range second threshold value, it is determined that the cutting device has the risk of cutter disc jamming or main shaft overload.

[0028] If the actual rotational speed variation range is less than the variation range second threshold value and greater than a variation range first threshold value, it is determined that secondary analysis is needed.

[0029] If the actual rotational speed variation range is less than or equal to the variation range first threshold value, it is determined that the initial rotational speed and the cutting depth can meet the requirements of material fluctuation and slope surface of the channel protection slope.

[0030] Further, the process of secondary analysis includes,

[0031] The slot image generated by cutting the channel protection slope is obtained by the camera device, the slot in the slot image is subjected to image recognition and edge detection, and the curvature radius of the slot in the slot image obtained in the initial detection period is extracted.

[0032] If the curvature radius of the slot is less than a critical radius, it is determined that there is an edge curvature abrupt point, the slot edge has sharp corners or sawteeth, and the slot edge is collapsed.

[0033] Further, the process of determining whether the joint slot of the expansion joint is in the process of collapsing on the convex surface of the channel slope includes,

[0034] If the initial detection period of the radius of curvature less than the critical radius corresponds to the initial detection period of the current feeding pressure that determines the existence of the convex surface of the channel slope, it is determined that the joint slot of the expansion joint is in the process of collapsing on the convex surface of the channel slope.

[0035] If the initial detection period of the radius of curvature less than the critical radius does not correspond to the initial detection period of the current feeding pressure that determines the existence of the convex surface of the channel slope, it is determined that the joint slot of the expansion joint is in the process of collapsing in the area where the channel slope does not have a convex surface.

[0036] Further, the process of determining whether the moving speed and the rotating speed of the cutting device match includes,

[0037] When the joint slot of the expansion joint is in the process of collapsing in the area where the channel slope does not have a convex surface, it is determined that the moving speed and the rotating speed of the cutting device do not match, the initial moving speed exceeds the normal range, and the initial moving speed of the cutting device is reduced.

[0038] When the joint slot of the expansion joint is in the process of collapsing on the convex surface of the channel slope and no collapse occurs in the area where the channel slope does not have a convex surface, it is determined that the moving speed and the rotating speed of the cutting device match, and the initial detection period is reduced according to the ratio of the initial rotating speed change amplitude to the first threshold value of the change amplitude.

[0039] A expansion joint cutting device for channel slope process, comprising:

[0040] A cutting disc is arranged at the bottom of the cutting device and connected with a rotating pulley and a threaded block, and the rotating pulley is used to rotate the cutting disc.

[0041] A motor is arranged at the top of the cutting device, and the bottom surface of the motor output shaft is fixedly connected with a threaded rod arranged inside the cutting device, and the surface of the threaded rod is threadedly connected with the threaded block.

[0042] A limiting rod is arranged inside the cutting device, and a through hole is formed in the surface of the threaded block, and the limiting rod passes through the through hole and is slidingly connected therewith.

[0043] The threaded block is used to move up and down along the limiting rod under the rotating action of the threaded rod, and drive the cutting disc to move up and down.

[0044] A cooling device is arranged at the bottom of the cutting device and located at one side of the cutting disc, and is connected with a water storage tank arranged inside the cutting device, and a camera device is arranged at the other side of the cutting disc.

[0045] A partition is arranged between the water storage tank inside the cutting device and the rotating pulley, and sliding wheels are arranged at the bottom of both sides of the cutting device.

[0046] Compared with the prior art, the beneficial effects of the present application are that the purpose of cutting the expansion joint is to reserve a gap in the slope protection structure to release the stress caused by temperature changes, concrete shrinkage or foundation settlement, thereby avoiding cracking or damage of the slope protection. Reasonable design of the cutting position and size of the expansion joint is crucial to ensure the stability and durability of the slope protection structure. Meanwhile, filling flexible materials (closed-cell foam, sealant) after cutting can absorb deformation energy and reduce the thrust of the soil on the slope.

[0047] Further, when cutting the expansion joint of the channel slope, the cutting depth error will cause the cutting depth error of the entire expansion joint formed by the subsequent expansion joint to exceed the range. The high strength of the concrete forming the channel slope will cause the cutter head to lift. The present method takes into account the influence of the increase of the part of the cutting disc immersed in the concrete on the pressure during the cutting depth process. Since the cutting pressure naturally increases with the increase of the cutting depth, the cutting pressure should increase uniformly. However, if the concrete strength does not match the expected value, the growth rate of the cutting pressure will be significantly higher or lower than expected. Therefore, the cutting depth is automatically increased when the actual hardness of the concrete is higher than the design value to compensate for the cutter head lifting effect caused by the more difficult cutting of the material, eliminating the joint depth unqualified rate caused by material fluctuations. At the same time, the initial rotational speed determined in advance is used as the initial rotational speed of the cutting disc during the subsequent moving cutting of the cutting device, which will affect the risk of tool wear during moving cutting if it is not adjusted according to the concrete strength. Increasing the initial rotational speed can reduce excessive tool wear. The present method avoids random cracks in the concrete slope caused by temperature stress or frost heaving by precisely cutting the expansion joint, thereby maintaining the integrity and stability of the slope.

[0048] Further, material fluctuations will cause the concrete strength to deviate from the expected value, and the channel slope has a curved surface. The present method analyzes the pressure on the cutting disc and the change in rotational speed generated by the cutting disc according to the change in feed pressure and the difference in rotational speed generated by the cutting disc to reflect the change in the buried depth of the cutting disc and determine whether the channel slope has a concave-convex curved surface. The cutting depth of the adjusting device is adjusted to avoid the curved surface of the channel slope reducing the accuracy of the expansion joint and thereby affecting the stability of the channel slope. At the same time, the present method adopts an adjustment strategy that controls the amplitude of the operating parameters of the cutting disc according to the detected parameters. However, due to different degrees of material fluctuations and curved surfaces, the strategy and degree may not completely correspond, so it is necessary to analyze the operating state of the cutting device in real time according to the change in the initial rotational speed to determine whether the adjustment of the initial rotational speed and the cutting depth can meet the needs of material fluctuations and slope curvature of the channel slope, and to distinguish between normal working conditions and fault risks. The detection sensitivity is taken into account to improve the accuracy and reliability of the expansion joint generated by cutting, thereby maintaining the integrity and stability of the slope and improving the deformation resistance of the slope.

[0049] Further, in theory, the expansion joint should be a straight line, and the curvature radius is close to positive infinity, but in actual construction, a small smooth transition is allowed, and it can be approximated as a straight line; the method obtains the slot image generated by the cutting device cutting the channel slope through the camera device located on one side of the cutting disc at the bottom of the cutting device, and identifies and extracts the curvature radius of the slot in the image; when the curvature radius sharply decreases, it is determined that the edge of the slot has sharp corners or sawteeth, and there is a collapse phenomenon; and according to the corresponding relationship of the initial detection period, the collapse and the existence of convex surface of the channel slope are combined; when there is no convex surface but the collapse occurs, it is determined that the initial moving speed and the initial rotating speed are not matched, and the initial moving speed is adjusted; when the convex surface produces the collapse, it is determined that the convex surface exists, and the adjusting process sensitivity of the cutting depth is reduced according to the ratio of the actual rotating speed to the initial rotating speed, which leads to the fact that the adjusting strategy for the convex surface is not timely enough; accordingly, the initial detection period is reduced in the process of analyzing the running state of the cutting device according to the change of the initial rotating speed, the flexibility and adaptability of the real-time analysis and adjustment process of the expansion joint cutting are improved, and the integrity and stability of the slope are further maintained to improve the deformation resistance of the slope. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 The figure is a flowchart of the construction method of the expansion joint cutting device for the channel slope process in the embodiment of the application.

[0051] Figure 2 The figure is a structural schematic diagram of the expansion joint cutting device in the embodiment of the application.

[0052] Figure 3 The figure is a top view layout schematic diagram of the channel slope expansion joint in the embodiment of the application.

[0053] Figure 4 The figure is a front view setting schematic diagram of the channel slope and the slide rail in the embodiment of the application.

[0054] In the figure: 1-channel slope, 2-cutting device, 3-slide rail, 4-supporting device, 21-cutting disc, 22-limiting rod, 23-threaded block, 24-motor, 25-rotating pulley, 26-baffle, 27-threaded rod, 28-water storage tank, 29-cooling device, 5-sliding wheel, 6-camera device. DETAILED DESCRIPTION

[0055] In order to make the purpose and advantages of the application more clear and explicit, the application will be further described below in combination with embodiments; it should be understood that the specific embodiments described herein are only used to explain the application, and do not limit the application.

[0056] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art will understand that the embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.

[0057] It should be noted that, in the description of the present application, the terms indicating the direction or positional relationship of "upper", "lower", "left", "right", "inner", "outer" and the like are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0058] In addition, it should also be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0059] Please refer to Figures 1-4 shown, Figure 1 is a flowchart of the construction method of the expansion joint cutting device for the channel slope protection process in the embodiments of the present application; Figure 2 is a structural schematic diagram of the expansion joint cutting device in the embodiments of the present application; Figure 3 is a top view layout schematic diagram of the channel slope expansion joint in the embodiments of the present application; Figure 4 is a front view setting schematic diagram of the channel slope and the slide rail in the embodiments of the present application.

[0060] The present application provides a construction method of an expansion joint cutting device for a channel slope protection process, comprising:

[0061] Step S1, determining the specific position of the expansion joint to be cut, installing the slide rail at the corresponding position of the expansion joint, and starting the expansion joint cutting device to cut the expansion joint of the channel slope according to the initial rotating speed, the initial feeding speed and the initial moving speed;

[0062] Step S2, controlling the cutting disc to cut into the slope concrete according to the initial rotating speed and the initial feeding speed, calculating the feeding speed difference to reflect the concrete strength fluctuation combined with the cutting pressure of the cutting disc, and adjusting the cutting depth and the initial rotating speed according to the feeding speed difference;

[0063] Step S3, detecting the feeding pressure and the actual rotating speed of the cutting disc according to the initial detection period, and determining whether the channel slope has a concave-convex surface according to the changes of the feeding pressure and the actual rotating speed.

[0064] Step S4, determining the convex-concave surface type according to the current feeding pressure and the historical feeding pressure, and adjusting the cutting depth according to the convex-concave surface type;

[0065] Step S5, analyzing the running state of the cutting device in real time according to the change of the actual rotating speed in the initial detection period, and determining whether the cutting device has a running risk or needs secondary analysis;

[0066] Step S6, when secondary analysis is needed, performing image recognition and edge detection on the slot image generated after cutting the channel revetment according to the initial detection period, and determining whether the slot edge is collapsed according to the extracted radius of curvature of the slot;

[0067] Step S7, determining whether the slot of the expansion joint is collapsed on the convex surface of the channel revetment according to the initial detection period, and determining whether the moving speed and the rotating speed of the cutting device are matched, and reducing the initial moving speed of the cutting device or the initial detection period;

[0068] Step S8, cleaning the slot section of the expansion joint of the channel revetment after cutting, and pouring sealing glue for maintenance.

[0069] The channel revetment refers to a protective structure arranged on both sides or the bottom of the channel, which is used to prevent collapse, landslide and other problems caused by water erosion, soil erosion or gravity

[0070] The cutting of the channel revetment expansion joint is a key technology in construction, and the purpose is to adapt to the deformation of the revetment structure caused by temperature changes, concrete shrinkage or foundation settlement, and prevent the generation of cracks

[0071] Specifically, the purpose of cutting the expansion joint is to reserve a gap in the revetment structure to release the stress caused by temperature changes, concrete shrinkage or foundation settlement, so as to avoid cracking or damage of the revetment. Reasonable design of the cutting position and size of the expansion joint is crucial to ensure the stability and durability of the revetment structure. At the same time, filling flexible materials (closed-cell foam, sealing glue) after cutting can absorb deformation energy and reduce the thrust of the soil on the revetment.

[0072] The cutting depth is positively correlated with the thickness of the channel revetment, and in the embodiment, the cutting depth is 0.3-0.4 times the thickness of the revetment, and the cutting depth is less than the radius of the cutting disc;

[0073] In the embodiment, the shape of the slide rail 3 is consistent with the cross-sectional shape of the channel slope protection, the supporting device 4 is connected with the slide rail 3 for supporting the slide rail 3, the cutting device 2 is installed on the slide rail 3 and contacts with the channel slope protection 1, the power mechanism for driving the cutting device 2 to move is installed between the cutting device 2 and the slide rail 3, the cutting disc 21 of the cutting device 2 contacts with the channel slope protection 1, and the power mechanism drives the cutting device 2 to move along the slide rail 3 at the initial moving speed.

[0074] In the embodiment, the rotation speed of the threaded rod is controlled by the motor power, the moving speed of the threaded block and the extension length of the cutting disc are controlled according to the rotation speed of the threaded rod, so that the cutting disc cuts in the depth direction at the initial feeding speed.

[0075] In the embodiment, the channel slope protection is a concrete slope protection.

[0076] The extension length of the cutting disc in the initial detection period is detected in real time, the extension length corresponds to the current cutting depth of the cutting disc, and the actual feeding speed is calculated;

[0077] The feeding speed difference value is calculated according to the actual feeding speed and the initial feeding speed, the cutting pressure borne by the cutting disc is combined to reflect the strength of the concrete, and the initial rotation speed and the cutting depth are adjusted;

[0078] If the feeding speed difference value is greater than the difference value evaluation value, and the cutting pressure does not meet the linear expectation, it is judged that the strength of the concrete exists fluctuation, and the initial rotation speed and the cutting depth are adjusted;

[0079] The cutting disc pressure is detected in real time, the cutting pressure growth range in the initial detection period is calculated according to the cutting pressure among the cutting disc pressures, and when the difference between the cutting pressure growth range and the theoretical growth range is greater than the critical range, it is determined that the cutting pressure does not meet the linear expectation;

[0080] Specifically, when the actual feeding speed is less than the initial feeding speed, the ratio of the feeding speed difference value to the initial feeding speed is taken as the increase range to increase the initial rotation speed;

[0081] When the actual feeding speed is less than the initial feeding speed, the cutting depth is increased, and the increased cutting depth = the cutting depth before adjustment + K × | actual feeding speed - initial feeding speed |, K is a compensation coefficient, and in the embodiment, K is equal to 0.15, which means that the cutting depth is increased by 0.15 mm per mm / s of speed change.

[0082] The cutting disc pressure is divided into a cutting pressure and a feeding pressure, the cutting pressure is the pressure borne by the cutting disc in the cutting depth direction, and the feeding pressure is the pressure borne by the cutting disc in the moving direction of the cutting device.

[0083] The difference value evaluation value is 5% of the initial feeding speed, and the critical amplitude is 10%.

[0084] Specifically, when the expansion joint of the channel slope is cut, the cutting depth error will cause the cutting depth error of the entire expansion joint formed by the subsequent expansion joint to exceed the range. Since the concrete forming the channel slope has high strength, the cutter head will lift. The method considers the influence of the increase of the part of the cutting disc immersed in the concrete on the cutting pressure during the cutting process. Since the cutting pressure will naturally increase with the increase of the cutting depth, the cutting pressure should increase uniformly. However, if the concrete strength does not match the expected value, the growth rate of the cutting pressure will be significantly higher or lower than expected. Therefore, the cutting depth is automatically increased when the actual hardness of the concrete is higher than the design value, compensating for the cutter head lifting effect caused by the more difficult cutting of the material, and eliminating the joint depth unqualified rate caused by material fluctuations. At the same time, the initial rotational speed determined in advance is the initial rotational speed of the cutting disc during the subsequent moving cutting of the cutting device, and the initial rotational speed is not adjusted according to the concrete strength, which will affect the moving cutting and increase the risk of tool wear. Increasing the initial rotational speed can reduce excessive tool wear. The method avoids random cracks in the concrete slope caused by temperature stress or frost heaving by accurately cutting the expansion joint, thereby maintaining the integrity and stability of the slope.

[0085] For the case where the channel slope has a concave-convex surface, whether there is a concave-convex surface is determined according to the feeding pressure on the cutting disc.

[0086] The initial detection period is detected according to the feeding pressure and the actual rotational speed of the cutting disc, and the feeding pressure change amplitude is calculated. The feeding pressure change amplitude=(current feeding pressure-historical feeding pressure) / historical feeding pressure.

[0087] In the implementation, the feeding pressure detected by the current initial detection period is the current feeding pressure, and the feeding pressure detected by the previous initial detection period is the historical feeding pressure.

[0088] If the feeding pressure change amplitude is greater than the critical amplitude, and the rotational speed difference between the actual rotational speed of the cutting disc and the initial rotational speed is greater than the standard value, it is determined that the channel slope has a concave-convex surface.

[0089] Specifically, when the current feeding pressure is greater than the historical feeding pressure and the actual rotational speed is less than the initial rotational speed, it is determined that the channel slope has a convex surface. When the current feeding pressure is less than the historical feeding pressure and the actual rotational speed is greater than the initial rotational speed, it is determined that the channel slope has a concave surface.

[0090] The cutting pressure is the pressure on the cutting disc in the cutting depth direction, and the feeding pressure is the pressure on the cutting disc in the moving direction of the cutting device.

[0091] In the presence of the concave-convex surface, the cutting depth is adjusted according to the concave-convex surface condition, the cutting depth is reduced according to the ratio of the actual speed to the initial speed in the presence of the convex surface, and the cutting depth is increased according to the ratio of the actual speed to the initial speed in the presence of the concave surface.

[0092] The initial speed is 3%, and the critical amplitude is 5%.

[0093] In the expansion joint cutting process, the actual speed variation amplitude is calculated according to the variation of the actual speed in the initial detection period, and the cutting device running state is analyzed in real time.

[0094] If the actual speed variation amplitude is greater than or equal to the variation amplitude second threshold value, it is judged that the cutting device has the risk of cutter head jamming or spindle overload.

[0095] If the actual speed variation amplitude is less than the variation amplitude second threshold value and greater than the variation amplitude first threshold value, it is judged that secondary analysis is needed.

[0096] If the actual speed variation amplitude is less than or equal to the variation amplitude first threshold value, it is judged that the initial speed and the cutting depth can meet the requirements of the material fluctuation of the channel slope and the slope surface.

[0097] The variation amplitude first threshold value is 3%, and the variation amplitude second threshold value is 8%.

[0098] Specifically, the material fluctuation will cause the concrete strength to deviate from the expectation, and the channel slope has a curved surface condition. The method analyzes the pressure and speed variation of the cutting disc from the feed pressure variation amplitude and the speed difference generated by the cutting disc, reflects the change of the cutting disc burial depth, judges the existence of the concave-convex surface of the channel slope, adjusts the cutting depth of the adjusting device to avoid the curved surface condition of the channel slope, reduces the accuracy of the expansion joint, and thus affects the stability of the channel slope. At the same time, the method adopts an adjusting strategy of controlling the amplitude of the running parameters of the cutting disc according to the detected various parameters, but due to the different degrees of material fluctuation and curved surface condition, the strategy and degree may not completely correspond, so it is necessary to analyze the running state of the cutting device in real time according to the initial speed variation, judge whether the adjustment of the initial speed and the cutting depth can meet the requirements of the material fluctuation of the channel slope and the slope surface, and distinguish between normal working conditions and fault risks, taking into account the detection sensitivity, improving the accuracy and reliability of the expansion joint generated by cutting, and thus maintaining the integrity and stability of the slope, improving the anti-deformation ability of the slope.

[0099] The secondary analysis process includes:

[0100] The cutting device cuts the channel slope to generate a slot image, and the slot image generated after cutting the channel slope is detected according to the obtained slot image.

[0101] According to the slot image, whether the slot has edge collapse is detected, so as to determine whether the initial rotating speed setting is problematic or the moving speed of the cutting device and the initial rotating speed are matched

[0102] The slot in the slot image is subjected to image recognition and edge detection, and the radius of curvature of the slot in the slot image obtained in the initial detection period is extracted.

[0103] If the radius of curvature of the slot is less than the critical radius, it is determined that there is an edge curvature abrupt point, the slot edge has sharp corners or sawteeth, and the slot edge collapses;

[0104] If the initial detection period of the radius of curvature less than the critical radius corresponds to the initial detection period of the current feeding pressure for determining that the channel protection slope has a convex surface, it is determined that the slot of the expansion joint collapses on the convex surface of the channel protection slope.

[0105] If the initial detection period of the radius of curvature less than the critical radius does not correspond to the initial detection period of the current feeding pressure for determining that the channel protection slope has a convex surface, it is determined that the slot of the expansion joint collapses in the region where the channel protection slope does not have a convex surface.

[0106] When the slot of the expansion joint collapses in the region where the channel protection slope does not have a convex surface, it is determined that the moving speed of the cutting device and the rotating speed are not matched, the initial moving speed exceeds the normal range, and the initial moving speed of the cutting device is reduced.

[0107] When the slot of the expansion joint collapses on the convex surface of the channel protection slope and does not collapse in the region where the channel protection slope does not have a convex surface, it is determined that the moving speed of the cutting device and the rotating speed are matched, and the initial detection period is reduced according to the ratio of the initial rotating speed change amplitude to the first threshold value of the change amplitude.

[0108] It can be understood that the person skilled in the art can determine the correspondence between the initial detection period of the feeding pressure and the initial detection period of the radius of curvature according to the length of the initial detection period and the moving speed of the cutting device.

[0109] The radius of curvature is 1 mm.

[0110] Specifically, theoretically, the expansion joint should be a straight line with a curvature radius close to positive infinity, but in actual construction, a small smooth transition is allowed, which can be approximated as a straight line; The method obtains the slot image generated by the cutting device cutting the channel slope through the camera device located on one side of the cutting disc at the bottom of the cutting device, and identifies and extracts the curvature radius of the slot in the image. When the curvature radius decreases sharply, it is determined that the edge of the slot has sharp corners or sawteeth, and there is a collapse phenomenon; and according to the correspondence of the initial detection period, the collapse is combined with whether there is a convex surface on the channel slope. When there is no convex surface but collapse occurs, it is determined that the initial moving speed and the initial rotating speed are not matched, and the initial moving speed is adjusted. When the convex surface produces collapse, it is determined that the convex surface exists according to the ratio of the actual rotating speed to the initial rotating speed. The low sensitivity of the adjustment process of reducing the cutting depth leads to the fact that the adjustment strategy for the convex surface is not timely. Correspondingly, the parameters in the process of analyzing the running state of the cutting device according to the change of the initial rotating speed are reduced to reduce the initial detection period, improve the flexibility and adaptability of the real-time analysis and adjustment process of the expansion joint cutting, and further maintain the integrity and stability of the slope to improve the anti-deformation ability of the slope.

[0111] When there is a collapse, the influence level is divided according to the width of the collapse, and corresponding treatment measures are taken. If the width of the collapse is less than 0.5mm, it is judged that the influence level is 0 level, and no treatment is needed; if 0.5mm is less than or equal to the width of the collapse, which is less than 2mm, it is judged that the influence level is 1 level, which slightly affects the anti-seepage, and the sealant is used to repair the collapse; if 2mm is less than or equal to the width of the collapse, which is less than 5mm, it is judged that the influence level is 2 level, which may cause frost heaving damage, and the collapsed area is locally removed and repaired with polymer mortar; if the width of the collapse is greater than or equal to 5mm, it is judged that the influence level is 3 level, which has a potential safety hazard to the structure, and the channel slope with the collapsed area is removed and reconstructed.

[0112] An expansion joint cutting device for channel slope process, comprising:

[0113] A cutting disc 21 is arranged at the bottom of the cutting device 2 and connected with a rotating pulley 25 and a threaded block 23. The rotating pulley 25 is used to drive the cutting disc 21 to rotate.

[0114] A motor 24 is arranged at the top of the cutting device 2. The bottom surface of the motor output shaft is fixedly connected with a threaded rod 27 arranged inside the cutting device. The surface of the threaded rod 27 is threadedly connected with the threaded block 23.

[0115] A limiting rod 22 is arranged inside the cutting device 2. A through hole is formed in the surface of the threaded block 23. The limiting rod 22 passes through the through hole and is slidably connected with the through hole.

[0116] The threaded block 23 is used to move up and down along the limiting rod 22 under the action of the rotation of the threaded rod 27, so as to drive the cutting disc 21 to move up and down.

[0117] Cooling device 29 is arranged at the bottom of the cutting device 2, on one side of the cutting disc 21, and is connected to the water storage tank 28 arranged inside the cutting device. The other side of the cutting disc 21 is provided with a camera device 6.

[0118] A partition 26 is arranged between the water storage tank inside the cutting device and the rotating pulley. The bottom of the cutting device on both sides is provided with a sliding wheel 5.

[0119] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after these changes or replacements will fall within the protection scope of the present application.

[0120] The above description is only the preferred embodiments of the present application and is not intended to limit the present application; for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A construction method for an expansion joint cutting device used in channel slope protection, characterized in that, include: Determine the specific location of the expansion joint that needs to be cut, and start the expansion joint cutting device to cut the expansion joint of the channel slope according to the initial rotation speed, initial feed speed and initial moving speed; The cutting disc is controlled to cut into the slope protection concrete according to the initial rotation speed and initial feed speed. The feed speed difference is calculated and combined with the cutting pressure of the cutting disc to see if it meets the linear expectation and reflects the fluctuation of concrete strength. The cutting depth and the initial rotation speed are adjusted according to the feed speed difference. The feed pressure and actual rotation speed of the cutting disc are detected according to the initial detection cycle. The presence of uneven surfaces on the channel slope is determined based on the changes in the feed pressure and actual rotation speed. The type of concave-convex surface is determined based on the current feed pressure and the historical feed pressure, and the cutting depth is adjusted according to the type of concave-convex surface. The operating status of the cutting device is analyzed in real time based on the change of the actual rotation speed within the initial detection cycle to determine whether there is an operational risk to the cutting device or whether a secondary analysis is required. When secondary analysis is required, the groove image generated after cutting the channel slope is subjected to image recognition and edge detection according to the initial detection cycle. The edge of the groove is determined to be chipped based on the extracted radius of curvature. Determine whether the expansion joint groove is chipped on the convex curved surface of the channel slope based on the initial inspection cycle, and determine whether the moving speed and rotation speed of the cutting device are matched, and reduce the initial moving speed or initial inspection cycle of the cutting device. Clean and trim the cut surface of the expansion joint of the channel slope protection, and then inject sealant for curing. The process of determining whether a surface with concavity or convexity exists includes, Calculate the feed pressure variation range. If the feed pressure variation range is greater than the critical range, and the difference between the actual rotation speed and the initial rotation speed of the cutting disc is greater than the standard value, then it is determined that there is an uneven surface on the channel slope. Wherein, the cutting pressure is the pressure on the cutting disc in the cutting depth direction, and the feed pressure is the pressure on the cutting disc in the moving direction of the cutting device; The process of determining whether the expansion joint groove is located on the convex curved surface of the channel slope during the collapse includes: If the initial detection period of the radius of curvature less than the critical radius corresponds to the initial detection period of the current feed pressure that determines the existence of a convex surface on the channel slope, then it is determined that the groove of the expansion joint is collapsing on the convex surface of the channel slope. If the initial detection period of the radius of curvature less than the critical radius does not correspond to the initial detection period of the current feed pressure that determines the existence of a convex surface on the channel slope, then it is determined that the expansion joint groove is collapsing in the area where there is no convex surface on the channel slope.

2. The construction method of the expansion joint cutting device for channel slope protection as described in claim 1, characterized in that, The extension and retraction length of the cutting disc during the initial detection cycle is detected in real time, and the actual feed rate is calculated. The feed rate difference is calculated based on the actual feed rate and the initial feed rate. If the feed rate difference is greater than the difference evaluation value and the cutting pressure does not meet the linear expectation, it is determined that the concrete strength is fluctuating, and the initial rotation speed and cutting depth are adjusted. When the actual feed rate is less than the initial feed rate, the ratio of the feed rate difference to the initial feed rate is used as the increase factor to increase the initial rotational speed, and the cutting depth is increased according to the feed rate difference and the compensation coefficient.

3. The construction method of the expansion joint cutting device for channel slope protection as described in claim 2, characterized in that, Based on the cutting pressure in the cutting disc pressure, the increase in cutting pressure during the initial detection cycle is calculated. When the difference between the increase in cutting pressure and the theoretical increase is greater than the critical range, it is determined that the cutting pressure does not conform to the linear expectation.

4. The construction method of the expansion joint cutting device for channel slope protection as described in claim 3, characterized in that, The process of determining the type of concave / convex surface includes, When the current feed pressure is greater than the historical feed pressure and the actual rotation speed is less than the initial rotation speed, it is determined that there is a convex curved surface on the channel slope, and the cutting depth is reduced according to the ratio of the actual rotation speed to the initial rotation speed. When the current feed pressure is less than the historical feed pressure and the actual rotation speed is greater than the initial rotation speed, it is determined that there is a concave surface on the channel slope, and the cutting depth is increased according to the ratio of the actual rotation speed to the initial rotation speed. The feed pressure detected in the current initial detection cycle is the current feed pressure, and the feed pressure detected in the previous initial detection cycle is the historical feed pressure.

5. The construction method of the expansion joint cutting device for channel slope protection according to claim 4, characterized in that, The process of analyzing the operating status of the cutting device includes calculating the actual rotational speed change range based on the change in actual rotational speed within the initial detection cycle; If the actual speed change is greater than or equal to the second threshold of the change range, it is determined that the cutting device is at risk of blade jamming or spindle overload. If the actual speed change is less than the second threshold of change but greater than the first threshold of change, then a second analysis is required. If the actual rotational speed variation is less than or equal to the first threshold of variation, then it is determined that the initial rotational speed and cutting depth can meet the requirements of material fluctuation and slope curvature for channel slope protection.

6. The construction method of the expansion joint cutting device for channel slope protection according to claim 5, characterized in that, The secondary analysis process includes, Images of grooves generated by cutting channel slope protection are acquired using a camera device. Image recognition and edge detection are performed on the grooves in the groove images, and the radius of curvature of the grooves in the groove images acquired within the initial detection period is extracted. If the radius of curvature of the groove is less than the critical radius, it is determined that there is a sudden change point in the edge curvature, and sharp corners or serrations appear at the edge of the groove, and the edge of the groove breaks.

7. The construction method of the expansion joint cutting device for channel slope protection according to claim 6, characterized in that, The process of determining whether the moving speed and rotation speed of the cutting device are matched includes, When the expansion joint groove collapses in an area of ​​the channel slope where there is no convex curved surface, it is determined that the moving speed and rotation speed of the cutting device are mismatched and the initial moving speed exceeds the normal range. The initial moving speed of the cutting device should be reduced. When the expansion joint groove collapses on the convex curved surface of the channel slope, and no collapse occurs in the area of ​​the channel slope where there is no convex curved surface, it is determined that the moving speed and rotation speed of the cutting device are matched, and the initial detection cycle is reduced according to the ratio of the initial rotation speed change amplitude to the first threshold of the change amplitude.

8. An expansion joint cutting device for channel slope protection using the construction method described in any one of claims 1-7, comprising: A cutting disc is disposed at the bottom of the cutting device and connected to a rotating pulley and a threaded block. The rotating pulley is used to drive the cutting disc to rotate. The motor is located at the top of the cutting device, and the bottom surface of the motor output shaft is fixedly connected to a threaded rod located inside the cutting device. The threaded rod is threadedly connected to the threaded block on its surface. A limiting rod is provided inside the cutting device, and a through hole is provided on the surface of the threaded block. The limiting rod passes through the through hole and is slidably connected to it. The threaded block is used to move up and down along the limiting rod under the rotation of the threaded rod, thereby driving the cutting disc to move up and down. A cooling device is located at the bottom of the cutting device, on one side of the cutting disc, and connected to a water tank inside the cutting device. A camera device is provided on the other side of the cutting disc. A partition is installed between the water storage tank inside the cutting device and the rotating pulley, and sliding wheels are installed at the bottom of both sides of the cutting device.

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