Automatic water level linkage adjustment channel slope test device and test method

Abstract

The invention discloses an automatic water level linkage adjustment channel slope test device and test method. The test device comprises a model box body, a channel slope model and a water level supply box, the water level supply box is mounted on the high slope side of the channel slope model, is internally provided with a water level linkage control module, comprises a water injection pipe, a water outlet pipe, an intelligent control valve and an ultrasonic liquid level meter, and is used for accurately adjusting the water level; a channel slope soil body is laid in the channel slope model, and a pore water pressure sensor, a soil pressure box and a soil moisture sensor are buried in the channel slope model; the device is further provided with a three-dimensional laser scanner and a high-speed camera, and all the sensors and equipment are connected to a dynamic data acquisition instrument and a computer. According to the channel slope test method for automatic water level linkage adjustment, water level lifting can be accurately controlled, so that the mechanical response and deformation conditions of a slope soil body are monitored, and the technical problem that an existing test model cannot accurately simulate the influence of water level dynamic change on slope stability is solved.

Description

Technical Field

[0001] The invention relates to the technical field of slope model testing, and in particular to a channel slope testing device and a testing method for automatic water level linkage regulation. Background Art

[0002] In today's world of inland waterway shipping, the construction and maintenance of waterway slopes are of vital importance. The stability of waterway slopes directly affects the safety and normal use of waterways. In actual waterways, water level changes are a key factor affecting the stability of waterway slopes. Frequent rises and falls of water levels in waterways will change the physical and mechanical properties of slope soil, leading to problems such as reduced shear strength of soil.

[0003] At present, indoor physical simulation tests are one of the important means to study the stability of waterway slopes. Many scholars have analyzed the impact of waterway water level changes on slope stability by burying soil pressure boxes, pore water pressure gauges and position tracking points in slope models. However, these waterway slope test devices often focus on considering the impact of slope soil characteristics and water flow scouring on slope stability, but the simulation of the important factor of groundwater level changes is not accurate enough. Many devices cannot adjust the groundwater level in real time and linkage, and cannot truly reflect the mechanical response and deformation of the slope soil during the dynamic change of the groundwater level. Some existing water level adjustment devices may simply perform water injection or drainage operations, lacking effective coupling with the internal seepage field of the slope model.

[0004] Therefore, how to link the changes in groundwater level, internal seepage in the slope soil and changes in waterway water level to construct a non-intrusive and continuous experimental device to study the evolution process of waterway slope slip caused by the effect of waterway water level, and further analyze and obtain the evolution law of waterway slope slip, so as to help optimize the maintenance strategy of the waterway slope, has become an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0005] In view of the deficiencies of the above-mentioned prior art, the present invention provides a channel slope testing device and a testing method with automated water level linkage regulation, which realizes real-time linkage regulation of the groundwater level at the rear edge of the slope and the waterway at the front edge, and monitors the mechanical response and deformation of the slope soil throughout the entire process, thereby solving the technical problem that the existing test model cannot accurately simulate the impact of dynamic changes in water level on slope stability.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A channel slope test device with automatic water level linkage regulation, comprising a channel slope test device body, the channel slope test device body comprising a model box, bedrock laid at the bottom of the model box, a channel slope model, and a water level supply box installed on the high slope side of the channel slope model;

[0008] The water level supply box is connected to the high slope side of the channel slope model of the model box, and is used to simulate the supply of groundwater to the channel slope model in the model box, and a water level linkage control module is provided in the water level supply box, which is used to control and adjust the water level in the water level supply box, thereby adjusting the simulated groundwater supply changes; the model box is provided with a water level adjustment control module on the low slope side of the channel slope model, which is used to adjust the water level on the low slope side of the channel slope model in the model box, thereby adjusting the simulated water level changes on the low slope side of the channel slope model;

[0009] The channel slope model is paved with a channel slope soil body, in which a number of pore water pressure sensors, soil pressure boxes and soil moisture sensors are distributed and buried, which are used to respectively collect water pressure, soil pressure and soil moisture information at different positions in the channel slope soil body; a three-dimensional laser scanner and a high-speed camera for monitoring changes in the channel slope soil body are installed on the low slope side of the channel slope model; the pore water pressure sensor, soil pressure box, soil moisture sensor, three-dimensional laser scanner and high-speed camera are connected to a dynamic data acquisition instrument for power supply and are electrically connected to a computer, and the computer is used to analyze the data collected by the dynamic data acquisition instrument to monitor the channel slope model.

[0010] In this way, the groundwater supply and river water level changes of the waterway slope model are simulated through the water level linkage control module and the water level regulation control module in the water level supply box, respectively, so as to achieve precise control and water level adjustment to simulate the dynamic changes of water levels in the real environment; at the same time, the various sensors buried in the soil of the waterway slope can collect the water pressure, soil pressure and soil moisture information inside the soil in real time, combined with the monitoring of slope soil changes by three-dimensional laser scanners and high-speed cameras, providing researchers with a multi-dimensional and high-precision data acquisition platform. These data are transmitted to the computer for analysis through a dynamic data acquisition instrument, enabling researchers to more accurately evaluate the mechanical behavior and deformation trend of the slope.

[0011] Preferably, the water level linkage control module includes a first water injection pipe and a first water outlet pipe arranged at the lower part of the water level supply tank, the first water injection pipe and the first water outlet pipe are respectively connected to a first intelligent control valve and a second intelligent control valve, a first ultrasonic level meter is fixedly installed on the upper part of the water level supply tank, and the first ultrasonic level meter sensing head is downward for detecting the water level of the water level supply tank; the water level regulation control module includes a second water injection pipe and a second water outlet pipe arranged on the low slope side of the channel slope model near the front edge water level of the channel slope model, the second water injection pipe is connected to a flow meter and a third intelligent control valve, and the second water outlet The pipe is connected to the fourth intelligent control valve, and a second ultrasonic liquid level meter is installed on the upper part of the low slope side of the channel slope model. The sensing head of the second ultrasonic liquid level meter is downward for measuring the water level at the front edge of the channel slope model; the first intelligent control valve, the second intelligent control valve, the third intelligent control valve, the fourth intelligent control valve, the first ultrasonic liquid level meter and the second ultrasonic liquid level meter are all electrically connected to the controller, and the controller is used to control the first intelligent control valve, the second intelligent control valve, the third intelligent control valve and the fourth intelligent control valve to control the opening and closing states of the corresponding water pipes, and control the first ultrasonic liquid level meter and the second ultrasonic liquid level meter to measure the corresponding water levels.

[0012] In this way, the first intelligent control valve and the second intelligent control valve in the water level linkage control module are controlled by the controller to control the first water injection pipe and the first water outlet pipe to realize the water level regulation of the groundwater in the channel slope model, and the third intelligent control valve and the fourth intelligent control valve in the water level regulation control module are controlled to control the second water injection pipe and the second water outlet pipe to realize the regulation of the water level on the low slope side of the channel slope model, that is, the front edge of the channel slope model.

[0013] Preferably, the specific distribution manner of the pore water pressure sensors, earth pressure boxes and soil moisture sensors in the channel slope soil is as follows: the pore water pressure sensors are arranged in an array in a horizontal manner side by side on the bottom layer of the channel slope soil; the earth pressure boxes are distributed at different slope heights of the channel slope soil, from the slope surface of the channel slope soil to different depths of the bottom of the channel slope soil; the soil moisture sensors are distributed at different slope heights of the channel slope soil, at different depths of the shallow layer of the slope surface of the channel slope soil; a three-dimensional laser scanner and a high-speed camera for monitoring changes in the channel slope soil are installed on the low slope side of the channel slope model; the pore water pressure sensor, earth pressure box, soil moisture sensor, three-dimensional laser scanner and high-speed camera are connected to a dynamic data acquisition instrument for power supply and are electrically connected to a computer, and the computer is used to analyze the data collected by the dynamic data acquisition instrument to monitor the channel slope model.

[0014] In the process of water level regulation, the scheme records the mechanical response and deformation of the channel slope soil in real time through pore water pressure sensors, earth pressure boxes and soil moisture sensors arranged at different depths in the channel slope soil. Among them, the pore water pressure sensor arranged at the bottom of the channel slope soil is used to monitor the changes in pore water pressure inside the channel slope soil. The longitudinal depth of the earth pressure box is arranged deeper in the channel slope soil than the soil moisture sensor, so that the stress transformation of the channel slope soil at different depths can be measured more accurately, more comprehensive soil internal stress data can be obtained, and the stability of the soil can be evaluated more accurately. Compared with the soil moisture sensor arranged in the shallow layer, the shallow soil moisture changes faster, so it can more sensitively respond to the changes in the soil, and the data used to monitor the changes in the channel slope soil is more accurate.

[0015] At the same time, by collecting data on the slope model during water level changes, as well as slope deformation data monitored by high-speed cameras and 3D laser scanners, the evolution process of waterway slope slip can be analyzed. In addition, based on this evolution process, the evolution law of waterway slope slip can be further analyzed. The influence mechanism of water level changes on slope stability can be clarified through the evolution law, thereby providing more accurate parameters for slope design, ensuring the stability of the slope under various water level conditions, and being able to predict potential risks, thereby improving the safety and disaster resistance of the slope.

[0016] Preferably, the model box body is composed of a model box frame, a front edge steel plate, a rear edge steel plate and a double-layer organic glass plate. The model box frame is welded by a front edge frame steel frame and a rear edge frame steel frame. The front edge steel plate and the rear edge steel plate are welded to the model box body frame and are bonded and enclosed by double-layer organic glass on both sides to form an overall cylindrical box body.

[0017] In this way, the structural support of the box is used to ensure that the model box remains stable during the test, so that it can withstand changes in internal water pressure and soil side pressure. At the same time, plexiglass is used as the sides of the model box, so that the staff can clearly observe the seepage and changes inside the channel slope model, which is convenient for real-time monitoring and recording.

[0018] Preferably, the specific way in which the water level supply box is connected to the high slope side of the channel slope model of the model box is that a plurality of water holes for realizing groundwater recharge of the channel slope model are evenly opened on the rear edge steel plate of the model box corresponding to the high slope side of the channel slope model, and the water holes are covered with a filter net.

[0019] In this way, soil seepage in the channel slope model can be prevented, and in a specific application embodiment, the water holes are arranged in an array structure to achieve groundwater recharge at the rear edge of the channel slope model.

[0020] A waterway slope test method for automatic water level linkage regulation is implemented using the waterway slope test device for automatic water level linkage regulation, and comprises the following steps:

[0021] S1. Test soil samples are distributed and laid in the channel slope model to prepare the channel slope soil body, pore water pressure sensors, soil pressure boxes and soil moisture sensors are buried in the channel slope soil body, a high-speed camera is installed on the rear edge frame steel frame of the channel slope model directly above the channel slope soil body, and a three-dimensional laser scanner is placed on the platform at the front edge steel plate, and the pore water pressure sensor, soil pressure box, soil moisture sensor, high-speed camera and three-dimensional laser scanner are all connected to a dynamic data acquisition instrument and electrically connected to a computer;

[0022] S2. Scan the channel slope soil using three-dimensional laser scanning, record the initial state of the channel slope soil and upload it to a dynamic data acquisition instrument;

[0023] S3, using the controller to control the water level linkage control module, adjusting the water level height of the water level supply tank and the channel slope model until the preset water level difference is reached, and using the water level linkage control module to control the water inlet and outlet speed to achieve water level rise and fall working condition simulation;

[0024] S4. The changing process of the water level of the channel slope soil is recorded by a high-speed camera, and the morphology of the channel slope soil after deformation is recorded by a three-dimensional laser scanner while maintaining a constant water level difference. The data collected by the dynamic data acquisition instrument is analyzed by computer to obtain the evolution process of the channel slope soil.

[0025] As a preferred solution, in step S3, the water level linkage control module is controlled by a controller to adjust the water level of the water level supply tank and the waterway slope model until the preset water level difference is reached, and the water level linkage control module is used to control the water inlet and outlet speeds to achieve the water level rise and fall working condition simulation, which includes the following specific steps:

[0026] S301, using a controller to simultaneously open the first intelligent control valve and the third intelligent control valve to inject water into the water level supply tank and the channel slope model respectively;

[0027] S302, respectively monitor the water level of the water level supply tank and the water level at the front edge of the channel slope model by using the first ultrasonic level meter and the second ultrasonic level meter, the water level of the water level supply tank is represented by h0, the water level at the front edge of the channel slope model is represented by h1, and the water level difference between the water level supply tank and the front edge of the channel slope model is calculated by the following formula:

[0028] Δh=h0-h1;

[0029] Where Δh represents the water level difference between the water level supply tank and the front edge of the channel slope model;

[0030] S303, judging whether the water level difference satisfies the preset initial water level difference; if not, continuing to inject water into the water level supply tank and the channel slope model until the preset initial water level is reached; if satisfied, simulating the water level rise and fall conditions on this basis.

[0031] As a preferred solution, in step S303, the simulated water level rise and fall conditions specifically include: simulated water level rise conditions and simulated water level drop conditions;

[0032] When simulating the water level rising condition, the controller controls the third intelligent control valve to continue to inject water into the channel slope model through the second water injection pipe, and inject water into the water level supply tank through the first water injection pipe according to the water inflow flow Q1 and the water inflow speed v1, and maintains the water level difference between the water level supply tank and the front edge of the channel slope model constant until the water level at the front edge of the channel slope model reaches the preset test water level;

[0033] When simulating the water level drop condition, the controller closes the third intelligent control valve to stop the second water injection pipe from injecting water, and opens the fourth intelligent control valve to drain the channel slope model through the second outlet pipe, and injects water into the water level supply tank through the first water injection pipe according to the water inlet flow rate Q2 and the water inlet speed v2, and maintains the water level difference between the water level supply tank and the front edge of the channel slope model constant until the water level at the front edge of the channel slope model reaches the preset test water level.

[0034] As a preferred solution, when simulating the water level rising condition, the water inlet flow Q1 and the water inlet speed v1 of the water level supply tank are calculated by the following formula:

[0035] The calculation formula of the water inlet flow Q1 of the water level supply tank is:

[0036]

[0037] In the formula, q represents the water level flow rate of the slope loss obtained by the flow meter connected to the second outlet pipe, t represents the water injection time, A represents the water flow cross-sectional area of ​​the slope, and h represents the height of the simulated water level rise according to the test needs;

[0038] The calculation formula of the water inflow speed v1 of the water level replenishment tank is:

[0039]

[0040] Where r represents the radius of the first water inlet pipe.

[0041] As a preferred solution, when simulating the water level drop condition, the water inlet flow Q2 and the water inlet speed v2 of the water level supply tank are calculated by the following formula:

[0042] The calculation formula of the water inlet flow Q2 of the water level supply tank is:

[0043]

[0044] In the formula, k represents the permeability coefficient of homogeneous soil, L represents the length of the slope along the water flow direction, h0 represents the water level in the water level supply tank, and h1 represents the water level at the front edge of the channel slope model;

[0045] The calculation formula of the water inflow speed v2 of the water level replenishment tank is:

[0046]

[0047] Compared with the prior art, the present invention has the following technical effects:

[0048] (1) In the process of water level linkage regulation, the present invention distributes and lays pore water pressure sensors, earth pressure boxes and soil moisture sensors in the soil of the waterway slope, so as to realize the monitoring of multi-height water level data; the present invention records the mechanical response and deformation of the waterway slope soil in real time through pore water pressure sensors, earth pressure boxes and soil moisture sensors, collects data of the slope model during water level changes, and monitors the slope deformation data through high-speed cameras and three-dimensional laser scanners, so as to analyze and obtain the evolution process of waterway slope slip. In addition, according to the evolution process, the evolution law of waterway slope slip can be further analyzed, and the influence mechanism of water level changes on slope stability can be clarified through the evolution law, so as to provide more accurate parameters for the design of the slope, ensure the stability of the slope under various water level conditions, and predict potential risks, so as to improve the safety and disaster resistance of the slope.

[0049] (2) The waterway slope test device and method with automated water level linkage regulation of the present invention can accurately simulate the complex and changeable water level changes in the waterway. In addition to water level changes, the coupling effect of factors such as soil property changes and seepage field and water level can also be considered, and automated control is achieved to a certain extent. The rate and amplitude of water level changes can be accurately and quickly adjusted according to preset procedures and parameters, effectively improving the efficiency of waterway slope testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to make the purpose, technical solution and advantages of the invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings, in which:

[0051] Figure 1 It is a schematic structural diagram of a channel slope test device with automatic water level linkage regulation disclosed in the present invention;

[0052] Figure 2 This is a cross-sectional view of the main body of the waterway slope test device of the present invention taken along line AA;

[0053] Figure 3It is a left view of the main body of the waterway slope testing device of the present invention;

[0054] Figure 4 A flow chart of a waterway slope test method for automatic water level linkage regulation disclosed in the present invention;

[0055] Explanation of the accompanying drawings: 1-channel slope test device body; 2-first ultrasonic level meter; 3-water level supply tank; 4-channel slope model; 5-computer; 6-high-speed camera; 7-second ultrasonic level meter; 8-three-dimensional laser scanner; 9-platform; 10-rear edge frame steel frame; 11-rear edge steel plate; 12-front edge frame steel frame; 13-front edge steel plate; 14-soil moisture sensor; 15-soil pressure box; 16-pore water pressure sensor; 17-first water injection pipe; 18-first intelligent control valve; 19-first water outlet pipe; 20-second intelligent control valve; 21-bedrock; 301-filter screen; 302-water hole; 111-third intelligent control valve; 112-fourth intelligent control valve; 121-second water injection pipe; 122-second water outlet pipe. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but only represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0057] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0058] Existing channel slope test models are usually unable to accurately simulate the dynamic coupling relationship between groundwater level changes, seepage inside the slope soil and waterway water level changes, which is crucial for truly reflecting the mechanical response and deformation of the slope soil during water level changes. However, existing devices can often only perform simple water injection or drainage operations, lacking the ability to monitor the seepage field inside the slope model in real time and to coordinate and adjust it, resulting in a large deviation between the test results and the actual engineering situation.

[0059] In addition, the existing channel slope test device cannot achieve non-intrusive, continuous monitoring and recording during the simulation process, and it is difficult to obtain complete data on the evolution of slope sliding, which makes it difficult for researchers to accurately analyze the influence of water level changes on slope stability, thereby affecting the scientificity and safety of channel slope design, construction and maintenance. Therefore, the present invention aims to solve the problem that the existing technology cannot accurately simulate the dynamic changes of water levels and their interaction with slope soil through a channel slope test device and method with automatic water level linkage regulation, thereby providing a more scientific, efficient and reliable test method for the stability research of channel slopes.

[0060] Specifically, the present invention discloses a channel slope test device with automatic water level linkage regulation, such as Figures 1 to 3 As shown, it includes a waterway slope test device body 1, the waterway slope test device body 1 includes a model box, a bedrock 21 laid at the bottom of the model box, a waterway slope model 4, and a water level supply box 3 installed on the high slope side of the waterway slope model 4;

[0061] The water level supply tank 3 is connected to the high slope side of the channel slope model 4 of the model box, and is used to simulate the supply of groundwater to the channel slope model 4 in the model box, and a water level linkage control module is provided in the water level supply tank 3, which is used to control and adjust the water level in the water level supply tank 3, thereby adjusting the simulated groundwater supply changes; the model box is provided with a water level adjustment control module at the low slope side of the channel slope model 4, which is used to adjust the water level on the low slope side of the channel slope model 4 in the model box, thereby adjusting the simulated water level changes on the low slope side of the channel slope model 4;

[0062] The channel slope model 4 is paved with a channel slope soil body, in which a number of pore water pressure sensors 16, soil pressure boxes 15 and soil moisture sensors 14 are distributed and buried, which are used to respectively collect water pressure, soil pressure and soil moisture information at different positions in the channel slope soil body; a three-dimensional laser scanner 8 and a high-speed camera 6 for monitoring changes in the channel slope soil body are installed on the low slope side of the channel slope model 4; the pore water pressure sensor 16, soil pressure box 15, soil moisture sensor 14, three-dimensional laser scanner 8 and high-speed camera are connected to a dynamic data acquisition instrument for power supply and are electrically connected to a computer 5, and the computer 5 is used to analyze the data collected by the dynamic data acquisition instrument to monitor the channel slope model 4.

[0063] In this embodiment, the water level linkage control module and the water level regulation control module in the water level supply box 3 are used to simulate the groundwater supply and river water level changes of the waterway slope model 4 respectively, so as to achieve precise control and water level adjustment to simulate the dynamic changes of water levels in a real environment; at the same time, the various sensors buried in the soil of the waterway slope can collect the water pressure, soil pressure and soil moisture information inside the soil in real time, and the monitoring of the slope soil changes by the three-dimensional laser scanner 8 and the high-speed camera 6 provides researchers with a multi-dimensional and high-precision data acquisition platform. These data are transmitted to the computer 5 for analysis through a dynamic data acquisition instrument, so that researchers can more accurately evaluate the mechanical behavior and deformation trend of the slope.

[0064] Preferably, the water level linkage control module includes a first water injection pipe 17 and a first water outlet pipe 19 arranged at the lower part of the water level supply tank 3, the first water injection pipe 17 and the first water outlet pipe 19 are respectively connected to a first intelligent control valve 18 and a second intelligent control valve 20, and a first ultrasonic liquid level meter 2 is fixedly installed on the upper part of the water level supply tank 3, and the first ultrasonic liquid level meter 2 has a sensing head downward for detecting the water level of the water level supply tank 3; the water level regulation control module includes a second water injection pipe 121 and a second water outlet pipe 122 arranged at the low slope side of the waterway slope model 4 close to the front edge water level of the waterway slope model 4, the second water injection pipe 121 is connected to a flow meter and a third intelligent control valve 111, and the second water outlet pipe 122 is connected to the fourth intelligent control valve 112, and a second ultrasonic level meter 7 is installed on the upper part of the low slope side of the channel slope model 4, and the sensing head of the second ultrasonic level meter 7 is downward for measuring the water level at the front edge of the channel slope model 4; the first intelligent control valve 18, the second intelligent control valve 20, the third intelligent control valve 111, the fourth intelligent control valve 112, the first ultrasonic level meter 2 and the second ultrasonic level meter 7 are all electrically connected to the controller, and the controller is used to control the first intelligent control valve 18, the second intelligent control valve 20, the third intelligent control valve 111 and the fourth intelligent control valve 112 to control the opening and closing states of the corresponding water pipes, and control the first ultrasonic level meter 2 and the second ultrasonic level meter 7 to measure the corresponding water levels.

[0065] In this embodiment, the first intelligent control valve 18 and the second intelligent control valve 20 in the water level linkage control module are controlled by the controller to control the first water injection pipe 17 and the first water outlet pipe 19 to achieve water level regulation of the groundwater of the channel slope model 4, and the third intelligent control valve 111 and the fourth intelligent control valve 112 in the water level regulation control module are controlled to control the second water injection pipe 121 and the second water outlet pipe 122 to achieve the regulation of the water level on the low slope side of the channel slope model 4, that is, the front edge of the channel slope model 4.

[0066] Preferably, the specific distribution manner of the pore water pressure sensor 16, the earth pressure box 15 and the soil moisture sensor 14 in the channel slope soil is as follows: the pore water pressure sensors 16 are arranged in an array in a horizontal manner and arranged at the bottom layer of the channel slope soil; the earth pressure box 15 is distributed and arranged at different depths from the slope surface of the channel slope soil to the bottom of the channel slope soil at different slope heights of the channel slope soil; the soil moisture sensor 14 is distributed and arranged at different depths in the shallow layer of the slope surface of the channel slope soil at different slope heights of the channel slope soil; a three-dimensional laser scanner 8 and a high-speed camera 6 for monitoring changes in the channel slope soil are installed on the low slope side of the channel slope model 4; the pore water pressure sensor 16, the earth pressure box 15, the soil moisture sensor 14, the three-dimensional laser scanner 8 and the high-speed camera are connected to a dynamic data acquisition instrument for power supply and are electrically connected to a computer 5, and the computer 5 is used to analyze the data collected by the dynamic data acquisition instrument to monitor the channel slope model 4.

[0067] In the process of water level regulation in this embodiment, the mechanical response and deformation of the waterway slope soil are recorded in real time by means of pore water pressure sensors 16, soil pressure boxes 15 and soil moisture sensors 14 arranged at different depths in the waterway slope soil; wherein, the pore water pressure sensor 16 arranged at the bottom of the waterway slope soil is used to monitor the pore water pressure changes inside the waterway slope soil, and the soil pressure box 15 is arranged at a deeper longitudinal depth in the waterway slope soil than the soil moisture sensor 14, so that the stress transformation of the waterway slope soil at different depths can be measured more accurately, more comprehensive soil internal stress data can be obtained, and the soil stability can be evaluated more accurately; compared with the soil moisture sensor 14 arranged in the shallow layer, since the shallow soil moisture changes faster, it can more sensitively respond to the changes in the soil, and the data used to monitor the changes in the waterway slope soil is more accurate.

[0068] At the same time, by collecting data of the slope model during the water level change process, and the slope deformation data monitored by the high-speed camera 6 and the three-dimensional laser scanner 8, the evolution process of the waterway slope slip can be analyzed. In addition, according to the evolution process, the evolution law of the waterway slope slip can be further analyzed. Through the evolution law, the influence mechanism of water level change on slope stability can be clarified, thereby providing more accurate parameters for the design of the slope, ensuring the stability of the slope under various water level conditions, and being able to predict potential risks, thereby improving the safety and disaster resistance of the slope.

[0069] Preferably, the model box body is composed of a model box frame, a front edge steel plate 13, a rear edge steel plate 11 and a double-layer organic glass plate. The model box frame is welded by a front edge frame steel frame 12 and a rear edge frame steel frame 10. The front edge steel plate 13 and the rear edge steel plate 11 are welded to the model box body frame and are bonded and enclosed by double-layer organic glass on both sides to form an overall cylindrical box body.

[0070] In this way, the structural support of the box is used to ensure that the model box remains stable during the test, so that it can withstand changes in internal water pressure and soil side pressure. At the same time, organic glass is used as both sides of the model box, so that the staff can clearly observe the seepage and changes inside the channel slope model 4, which is convenient for real-time monitoring and recording.

[0071] Preferably, the specific way in which the water level supply box 3 is connected to the high slope side of the channel slope model 4 of the model box is that a plurality of water holes 302 for realizing groundwater recharge of the channel slope model 4 are evenly opened on the rear edge steel plate 11 of the model box corresponding to the high slope side of the channel slope model 4, and the water holes 302 are covered with a filter net 301.

[0072] In this way, the soil in the channel slope model 4 can be prevented from seeping out, and in a specific application embodiment, the water holes 302 are arranged in an array structure to achieve groundwater recharge at the rear edge of the channel slope model 4.

[0073] When the present embodiment is specifically applied, a platform 9 for placing the three-dimensional laser scanner 8 is installed on the front edge steel plate 13 of the model box.

[0074] In this way, the design of platform 9 allows the three-dimensional laser scanner 8 to obtain the deformation data of the channel slope surface in real time during the test, and also facilitates the staff to set up, adjust and maintain the equipment. The design of platform 9 can also adapt to different three-dimensional laser scanners 8, providing flexibility and adaptability.

[0075] According to the above-mentioned waterway slope test device with automatic water level linkage regulation, the present invention also proposes a waterway slope test method with automatic water level linkage regulation, such as Figure 4 As shown, the method is implemented by using the above-mentioned channel slope test device, and specifically includes:

[0076] S1. Test soil samples are distributed and laid in the channel slope model to prepare the channel slope soil body, pore water pressure sensors, soil pressure boxes and soil moisture sensors are buried in the channel slope soil body, a high-speed camera is installed on the rear edge frame steel frame of the channel slope model directly above the channel slope soil body, and a three-dimensional laser scanner is placed on the platform at the front edge steel plate, and the pore water pressure sensor, soil pressure box, soil moisture sensor, high-speed camera and three-dimensional laser scanner are all connected to a dynamic data acquisition instrument and electrically connected to a computer;

[0077] S2. Scan the channel slope soil using three-dimensional laser scanning, record the initial state of the channel slope soil and upload it to a dynamic data acquisition instrument;

[0078] S3, using the controller to control the water level linkage control module, adjusting the water level height of the water level supply tank and the channel slope model until the preset water level difference is reached, and using the water level linkage control module to control the water inlet and outlet speed to achieve water level rise and fall working condition simulation;

[0079] S4. The changing process of the water level of the channel slope soil is recorded by a high-speed camera, and the morphology of the channel slope soil after deformation is recorded by a three-dimensional laser scanner while maintaining a constant water level difference. The data collected by the dynamic data acquisition instrument is analyzed by computer to obtain the evolution process of the channel slope soil.

[0080] In this embodiment, the water level change is accurately simulated through the water level linkage control module, and the dynamic coupling between the groundwater level change and the internal seepage of the channel slope soil is taken into account, so as to truly reflect the mechanical response and deformation of the slope soil during the water level change; at the same time, the non-intrusive monitoring combined with the pore water pressure sensor, the earth pressure box and the soil moisture sensor avoids the interference with the mechanical properties and deformation process of the channel slope soil, and ensures the accuracy and integrity of the test data; the automatic adjustment of the water level by the controller and the intelligent valve realizes the automatic control and realizes the comprehensive recording and analysis of the evolution process of the channel slope slip.

[0081] This embodiment specifically includes the following steps in realizing the simulation of water level rise and fall conditions:

[0082] S301, using a controller to simultaneously open the first intelligent control valve and the third intelligent control valve to inject water into the water level supply tank and the channel slope model respectively;

[0083] S302, respectively monitor the water level of the water level supply tank and the water level at the front edge of the channel slope model by using the first ultrasonic level meter and the second ultrasonic level meter, the water level of the water level supply tank is represented by h0, the water level at the front edge of the channel slope model is represented by h1, and the water level difference between the water level supply tank and the front edge of the channel slope model is calculated by the following formula:

[0084] Δh=h0-h1;

[0085] Where Δh represents the water level difference between the water level supply tank and the front edge of the channel slope model;

[0086] S303, judging whether the water level difference satisfies the preset initial water level difference; if not, continuing to inject water into the water level supply tank and the channel slope model until the preset initial water level is reached; if satisfied, simulating the water level rise and fall conditions on this basis.

[0087] In the specific application implementation, the simulated water level rise and fall conditions specifically include: simulated water level rise conditions and simulated water level drop conditions;

[0088] When simulating the rising water level condition, the controller controls the third intelligent control valve to continue to inject water into the channel slope model through the second water injection pipe, and injects water into the water level supply tank through the first water injection pipe according to the water inflow rate Q1 and the water inflow rate v1, and maintains the water level difference between the water level supply tank and the front edge of the channel slope model constant until the water level at the front edge of the channel slope model reaches the preset test water level; the calculation formula of the water inflow rate Q1 of the water level supply tank is:

[0089]

[0090] In the formula, q represents the water level flow rate of the slope loss obtained by the flow meter connected to the second outlet pipe, t represents the water injection time, A represents the water flow cross-sectional area of ​​the slope, and h represents the height of the simulated water level rise according to the test needs;

[0091] The calculation formula of the water inflow speed v1 of the water level replenishment tank is:

[0092]

[0093] Where r represents the radius of the first water inlet pipe.

[0094] When simulating the water level drop condition, the controller closes the third intelligent control valve to stop the second water injection pipe from injecting water, and opens the fourth intelligent control valve to drain the channel slope model through the second outlet pipe, and injects water into the water level supply tank through the first water injection pipe according to the water inlet flow rate Q2 and the water inlet speed v2, and maintains the water level difference between the water level supply tank and the front edge of the channel slope model constant until the water level at the front edge of the channel slope model reaches the preset test water level; the calculation formula of the water inlet flow rate Q2 of the water level supply tank is:

[0095]

[0096] In the formula, k represents the permeability coefficient of homogeneous soil, L represents the length of the slope along the water flow direction, h0 represents the water level in the water level supply tank, and h1 represents the water level at the front edge of the channel slope model;

[0097] The calculation formula of the water inflow speed v2 of the water level replenishment tank is:

[0098]

[0099] In summary, in the process of water level linkage regulation, the present invention distributes and lays pore water pressure sensors 16, soil pressure boxes 15 and soil moisture sensors 14 in the soil of the waterway slope, so as to realize the monitoring of multi-height water level data; the present invention records the mechanical response and deformation of the waterway slope soil in real time through the pore water pressure sensors 16, soil pressure boxes 15 and soil moisture sensors 14, collects the data of the slope model during the water level change process, and the slope deformation data monitored by the high-speed camera 6 and the three-dimensional laser scanner 8, so as to analyze and obtain the evolution process of the waterway slope slip. In addition, according to the evolution process, the evolution law of the waterway slope slip can be further analyzed, and the influence mechanism of water level change on the slope stability can be clarified through the evolution law, so as to provide more accurate parameters for the design of the slope, ensure the stability of the slope under various water level conditions, and be able to predict potential risks, so as to improve the safety and disaster resistance of the slope.

[0100] The channel slope test device and method with automated water level linkage regulation of the present invention can accurately simulate the complex and changeable water level changes in the channel. In addition to water level changes, the coupling effect of factors such as soil property changes and seepage field and water level can also be taken into account, and automated control is achieved to a certain extent. The rate and amplitude of water level changes can be accurately and quickly adjusted according to preset procedures and parameters, effectively improving the efficiency of channel slope testing.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described with reference to the preferred embodiments of the present invention, it should be understood by those skilled in the art that various changes may be made in form and details without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A channel slope test device with automatic water level linkage regulation, characterized in that: It includes a waterway slope test device body, which includes a model box, bedrock laid at the bottom of the model box, a waterway slope model, and a water level supply box installed on the high slope side of the waterway slope model; The water level supply box is connected to the high slope side of the channel slope model of the model box, and is used to simulate the supply of groundwater to the channel slope model in the model box, and a water level linkage control module is provided in the water level supply box, which is used to control and adjust the water level in the water level supply box, thereby adjusting the simulated groundwater supply changes; the model box is provided with a water level adjustment control module on the low slope side of the channel slope model, which is used to adjust the water level on the low slope side of the channel slope model in the model box, thereby adjusting the simulated water level changes on the low slope side of the channel slope model; The channel slope model is paved with a channel slope soil body, in which a number of pore water pressure sensors, soil pressure boxes and soil moisture sensors are distributed and buried, which are used to respectively collect water pressure, soil pressure and soil moisture information at different positions in the channel slope soil body; a three-dimensional laser scanner and a high-speed camera for monitoring changes in the channel slope soil body are installed on the low slope side of the channel slope model; the pore water pressure sensor, soil pressure box, soil moisture sensor, three-dimensional laser scanner and high-speed camera are connected to a dynamic data acquisition instrument for power supply and are electrically connected to a computer, and the computer is used to analyze the data collected by the dynamic data acquisition instrument to monitor the channel slope model.

2. The channel slope test device with automatic water level linkage regulation according to claim 1 is characterized in that: The water level linkage control module includes a first water injection pipe and a first water outlet pipe arranged at the lower part of the water level supply tank, the first water injection pipe and the first water outlet pipe are respectively connected to a first intelligent control valve and a second intelligent control valve, a first ultrasonic level meter is fixedly installed on the upper part of the water level supply tank, and the first ultrasonic level meter sensing head is downward for detecting the water level of the water level supply tank; the water level regulation control module includes a second water injection pipe and a second water outlet pipe arranged at the low slope side of the waterway slope model near the front edge water level of the waterway slope model, the second water injection pipe is connected to a flow meter and a third intelligent control valve, and the second water outlet pipe is connected to The fourth intelligent control valve is connected, and a second ultrasonic liquid level meter is installed on the upper part of the low slope side of the channel slope model, and the sensing head of the second ultrasonic liquid level meter is downward for measuring the water level at the front edge of the channel slope model; the first intelligent control valve, the second intelligent control valve, the third intelligent control valve, the fourth intelligent control valve, the first ultrasonic liquid level meter and the second ultrasonic liquid level meter are all electrically connected to the controller, and the controller is used to control the first intelligent control valve, the second intelligent control valve, the third intelligent control valve and the fourth intelligent control valve to control the opening and closing states of the corresponding water pipes, and control the first ultrasonic liquid level meter and the second ultrasonic liquid level meter to measure the corresponding water levels.

3. The channel slope test device with automatic water level linkage regulation according to claim 1 is characterized in that: The specific distribution method of the pore water pressure sensor, soil pressure box and soil moisture sensor in the channel slope soil is as follows: the pore water pressure sensors are arranged in an array in a horizontal manner and arranged at the bottom layer of the channel slope soil; the soil pressure boxes are distributed and arranged at different slope heights of the channel slope soil from the slope surface of the channel slope soil to different depths of the bottom of the channel slope soil; the soil moisture sensors are distributed and arranged at different depths of the shallow layer of the slope surface of the channel slope soil at different slope heights of the channel slope soil; a three-dimensional laser scanner and a high-speed camera for monitoring changes in the channel slope soil are installed on the low slope side of the channel slope model; the pore water pressure sensor, soil pressure box, soil moisture sensor, three-dimensional laser scanner and high-speed camera are connected to a dynamic data acquisition instrument for power supply and are electrically connected to a computer, and the computer is used to analyze the data collected by the dynamic data acquisition instrument to monitor the channel slope model.

4. The channel slope test device with automatic water level linkage regulation according to claim 1 is characterized in that: The model box body is composed of a model box frame, a front edge steel plate, a rear edge steel plate and a double-layer organic glass plate. The model box frame is welded by a front edge frame steel frame and a rear edge frame steel frame. The front edge steel plate and the rear edge steel plate are welded to the model box body frame and are bonded and enclosed by double-layer organic glass on both sides to form an overall cylindrical box body.

5. The channel slope test device with automatic water level linkage regulation according to claim 1 is characterized in that: The specific way in which the water level supply box is connected to the high slope side of the channel slope model of the model box is as follows: a plurality of water holes for realizing groundwater recharge of the channel slope model are evenly opened on the rear edge steel plate of the model box corresponding to the high slope side of the channel slope model, and the water holes are covered with a filter net.

6. A channel slope test method for automatic water level linkage regulation, characterized in that: The waterway slope test device for automatic water level linkage regulation according to any one of claims 1 to 5 is implemented, comprising the following steps: S1. Test soil samples are distributed and laid in the channel slope model to prepare the channel slope soil body, pore water pressure sensors, soil pressure boxes and soil moisture sensors are buried in the channel slope soil body, a high-speed camera is installed on the rear edge frame steel frame of the channel slope model directly above the channel slope soil body, and a three-dimensional laser scanner is placed on the platform at the front edge steel plate, and the pore water pressure sensor, soil pressure box, soil moisture sensor, high-speed camera and three-dimensional laser scanner are all connected to a dynamic data acquisition instrument and electrically connected to a computer; S2. Scan the channel slope soil using three-dimensional laser scanning, record the initial state of the channel slope soil and upload it to a dynamic data acquisition instrument; S3, using the controller to control the water level linkage control module, adjusting the water level height of the water level supply tank and the channel slope model until the preset water level difference is reached, and using the water level linkage control module to control the water inlet and outlet speed to achieve water level rise and fall working condition simulation; S4. The changing process of the water level of the channel slope soil is recorded by a high-speed camera, and the morphology of the channel slope soil after deformation is recorded by a three-dimensional laser scanner while maintaining a constant water level difference. The data collected by the dynamic data acquisition instrument is analyzed by computer to obtain the evolution process of the channel slope soil.

7. The waterway slope test method for automatic water level linkage regulation according to claim 6 is characterized in that: In step S3, the water level linkage control module is controlled by the controller to adjust the water level height of the water level supply tank and the waterway slope model until the preset water level difference is reached, and the water level linkage control module is used to control the water inlet and outlet speed to realize the water level rise and fall working condition simulation, which includes the following specific steps: S301, using a controller to simultaneously open the first intelligent control valve and the third intelligent control valve to inject water into the water level supply tank and the channel slope model respectively; S302, respectively monitor the water level of the water level supply tank and the water level at the front edge of the channel slope model by using the first ultrasonic level meter and the second ultrasonic level meter, the water level of the water level supply tank is represented by h0, the water level at the front edge of the channel slope model is represented by h1, and the water level difference between the water level supply tank and the front edge of the channel slope model is calculated by the following formula: Δh=h0-h1; Where Δh represents the water level difference between the water level supply tank and the front edge of the channel slope model; S303, judging whether the water level difference satisfies the preset initial water level difference; if not, continuing to inject water into the water level supply tank and the channel slope model until the preset initial water level is reached; if satisfied, simulating the water level rise and fall conditions on this basis.

8. The waterway slope test method for automatic water level linkage regulation according to claim 7 is characterized in that: In step S303, the simulated water level rise and fall conditions specifically include: simulated water level rise conditions and simulated water level drop conditions; When simulating the water level rising condition, the controller controls the third intelligent control valve to continue to inject water into the channel slope model through the second water injection pipe, and inject water into the water level supply tank through the first water injection pipe according to the water inflow flow Q1 and the water inflow speed v1, and maintains the water level difference between the water level supply tank and the front edge of the channel slope model constant until the water level at the front edge of the channel slope model reaches the preset test water level; When simulating the water level drop condition, the controller closes the third intelligent control valve to stop the second water injection pipe from injecting water, and opens the fourth intelligent control valve to drain the channel slope model through the second outlet pipe, and injects water into the water level supply tank through the first water injection pipe according to the water inlet flow rate Q2 and the water inlet speed v2, and maintains the water level difference between the water level supply tank and the front edge of the channel slope model constant until the water level at the front edge of the channel slope model reaches the preset test water level.

9. The waterway slope test method for automatic water level linkage regulation according to claim 8 is characterized in that: When simulating the water level rising condition, the water inlet flow Q1 and the water inlet speed v1 of the water level supply tank are calculated by the following formula: The calculation formula of the water inlet flow Q1 of the water level supply tank is: In the formula, q represents the water level flow rate of the slope loss obtained by the flow meter connected to the second outlet pipe, t represents the water injection time, A represents the water flow cross-sectional area of ​​the slope, and h represents the height of the simulated water level rise according to the test needs; The calculation formula of the water inflow speed v1 of the water level replenishment tank is: Where r represents the radius of the first water inlet pipe.

10. The channel slope test method for automatic water level linkage regulation according to claim 8, characterized in that: When simulating the water level drop condition, the water inlet flow Q2 and the water inlet speed v2 of the water level supply tank are calculated by the following formula: The calculation formula of the water inlet flow Q2 of the water level supply tank is: In the formula, k represents the permeability coefficient of homogeneous soil, L represents the length of the slope along the water flow direction, h0 represents the water level in the water level supply tank, and h1 represents the water level at the front edge of the channel slope model; The calculation formula of the water inflow speed v2 of the water level replenishment tank is:

Images