Simulation experiment method for brushing resistance of grouting material under different conditions

Abstract

The invention provides a grouting material brushing resistance simulation experiment method under different conditions, and the method comprises the following steps: building a flowing water flushing system; the flowing water flushing system adjusts the speed, so that water in the constant-temperature water mechanism is shunted to a plurality of flushing simulation environments with different roughness interfaces according to the set speed and temperature; through a slurry control system, slurry is controlled to be distributed into the scouring simulation environments of the interfaces with the different roughness according to the set flow speed; initial masses at different rates, change masses in an experiment and final masses after completion in each scouring simulation environment are collected respectively; according to a formula, the slurry retention rate is equal to the retention slurry / the total mass of the slurry; calculating to obtain the scouring performance of the simulation interface with different roughness at different speeds; and analyzing the scouring performance, drawing a relational graph among the anti-brushing performance, the roughness and the medium, and obtaining a factor analysis conclusion of the anti-scouring performance of the grouting material according to the relational graph.

Description

Technical Field

[0001] The invention relates to the technical field of grouting material performance research, and in particular to a grouting material anti-brushing performance simulation test method under different conditions. Background Art

[0002] For a long time, my country's infrastructure construction has been continuously improving, but the problem of water inrush encountered in tunnel construction has led to slow progress and construction casualties. Current research mainly focuses on the slurry retention rate of grouting materials under different water flow rates, but does not consider the actual complex conditions of the grouting site, such as the roughness of the grouting interface and the difference in the medium. The existing technology lacks experimental equipment that can simulate these complex conditions, which limits the research and application of the anti-scouring performance of grouting materials. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a simulation test method for the anti-brushing performance of grouting materials under different conditions, so that specific simulation on site can be realized.

[0004] In order to solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0005] The simulation test method of the anti-brushing performance of grouting materials under different conditions includes the following steps:

[0006] Build a dynamic water flushing system;

[0007] The dynamic water flushing system adjusts the speed so that the water in the constant temperature water mechanism is diverted to several flushing simulation environments with different roughness interfaces according to the set speed and temperature;

[0008] The slurry control system controls the slurry to flow into a plurality of scouring simulation environments of interfaces with different roughnesses according to a set flow rate;

[0009] Collect the initial mass at different rates, the changing mass during the experiment, and the final mass after the end of each scour simulation environment;

[0010] According to the formula, slurry retention rate = retained slurry / total slurry mass; the scouring performance of simulated interfaces with different roughness at different speeds is calculated;

[0011] The scouring performance is analyzed, and a relationship diagram between anti-scouring performance, roughness and medium is drawn, and the factor analysis conclusion of the anti-scouring performance of the grouting material is drawn based on the relationship diagram.

[0012] Furthermore, the steps for constructing a dynamic water flushing system also include constructing a constant temperature water mechanism, specifically a water tank with a built-in temperature controller, a heating mechanism and a cooling mechanism, and the heating mechanism and the cooling mechanism are used to heat or cool the water tank according to the temperature changes in the temperature controller, so that the water tank is always at a constant temperature.

[0013] Furthermore, the set speed is specifically achieved by controlling the pressure in the dynamic water flushing system through a pressure booster valve.

[0014] Furthermore, the interfaces with different roughness at least include a smooth surface, a granular rough surface, and a medium surface containing blocky medium.

[0015] Furthermore, in the slurry control system, the slurry is discharged through the slurry pipe via the slurry storage tank to the box of the corresponding scour simulation environment, and the mass of the discharged slurry is recorded in real time via the flow meter.

[0016] Furthermore, it also includes the production of a box in a scouring simulation environment, specifically: bottom plates with smooth bottom surfaces and rough bottom surfaces are obtained by processing, and an integrated box is formed by processing the bottom plate and the mounting plate, and a weighing device is arranged at the bottom of the box.

[0017] Furthermore, the medium interface is specifically formed by filling sand and / or gravel of different particle sizes in the box to form different medium surfaces.

[0018] Furthermore, the anti-brushing performance β is calculated by the following formula:

[0019] β=(G2-G0) / (G1-G0)

[0020] Among them, G0 is the total mass of box B in the scouring simulation environment; G1 is the total mass of the box after the slurry is added; G2 is the retained mass of the box after dynamic water scouring.

[0021] Furthermore, the analysis of flushing performance also includes determining whether roughness has a significant effect on slurry retention rate through variance analysis, and if so, using a sampling multiple comparison method to identify significant differences between specific conditions.

[0022] The present invention has the following beneficial effects:

[0023] The invention provides an experimental device capable of simulating the anti-scouring performance of grouting materials under different conditions, and provides an effective experimental means for the research and selection of grouting materials by simulating the conditions of smooth interfaces, interfaces with different roughnesses and filling with different media. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A flow chart of a simulation experimental method for anti-brushing performance of grouting materials under different conditions provided by the present invention;

[0025] Figure 2 One of the structural schematic diagrams of the anti-scour performance simulation test device for grouting materials provided by the present invention;

[0026] Figure 3 The second structural schematic diagram of the device side view provided by the present invention is a device for simulating the anti-scour performance of grouting materials;

[0027] Figure 4 One of the structural schematic diagrams of the scour simulation box provided by the present invention;

[0028] Figure 5 The second structural schematic diagram of the scour simulation box provided by the present invention;

[0029] Figure 6 A schematic structural diagram of a first scour simulation box provided by the present invention;

[0030] Figure 7 This is one of the structural schematic diagrams of the second scour simulation box provided by the present invention;

[0031] Figure 8 The second structural schematic diagram of the second scour simulation box provided by the present invention;

[0032] Fig. 9 A schematic diagram of the structure of a third scour simulation box provided by the present invention;

[0033] In the figure:

[0034] 1. Constant temperature box; 2. Base; 3. Water pipe; 4. Outflow box; 5. Slurry outlet; 6. Water branch; 7. Pressure valve; 8. First flow meter; 9. Water main pipe; 10. Slurry distribution pipe; 11. Slurry storage tank; 12. Slurry pipe; 13. Waste liquid storage box; 14. Second flow meter; 15. Connecting pipe; 17. Waste liquid pipe; 19. Slurry inlet; 20. Top plate; 21-Side plate, 22. Water inlet; 23. First lateral baffle; 24. Smooth surface; 25. Second lateral baffle; 26. Medium structure; 27. Wind pressure output plate, 28. Pipe hole; 30. Rough bottom plate; 31. Liquid outlet; 40. Scour simulation box; 41. First scour simulation box; 42. Second scour simulation box; 43. Third scour simulation box. DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0036] Refer to the attached Figure 1-9 As shown, the present invention provides an easy-to-install, mechanically controlled scour resistance simulation experimental method for grouting materials under different conditions, which can simulate the scour resistance of smooth interfaces, interfaces with different roughness, and under conditions of filling with different media, thereby providing an effective experimental means for the research and selection of grouting materials.

[0037] The core steps of the simulation test method for the anti-brushing performance of grouting materials under different conditions in this embodiment are as follows:

[0038] Build a dynamic water flushing system;

[0039] The dynamic water flushing system adjusts the speed so that the water in the constant temperature water mechanism is diverted to several flushing simulation environments with different roughness interfaces according to the set speed and temperature;

[0040] The slurry control system controls the slurry to flow into a plurality of scouring simulation environments of interfaces with different roughnesses according to a set flow rate;

[0041] Collect the initial mass at different rates, the changing mass during the experiment, and the final mass after the end of each scour simulation environment;

[0042] According to the formula, slurry retention rate = retained slurry / total slurry mass; the scouring performance of simulated interfaces with different roughness at different speeds is calculated;

[0043] The scouring performance is analyzed, and a relationship diagram between anti-scouring performance, roughness and medium is drawn, and the factor analysis conclusion of the anti-scouring performance of the grouting material is drawn based on the relationship diagram.

[0044] The specific combination of detailed structural settings is as follows:

[0045] The first step is to build a dynamic water flushing system, including a constant temperature system, water pipes, a pressure pump, a dynamic water tank, a waste liquid pipe and a waste liquid treatment tank to control the water flow rate and temperature.

[0046] For the specific settings of building a dynamic water flushing system, first of all, a complete dynamic water flushing system is constructed, which is mainly composed of the following parts: constant temperature system, water pipe, pressure pump, dynamic water tank, waste liquid pipe and waste liquid treatment box. The core function of this system is to accurately control the speed and temperature of the water flow to ensure the consistency and repeatability of the experimental conditions.

[0047] The constant temperature system in this embodiment is used to maintain a constant temperature of the water flow in the dynamic water tank to avoid the influence of temperature fluctuation on the anti-scouring performance of the grouting material. The constant temperature system achieves precise control of the water temperature through a built-in temperature controller and a heating / cooling device.

[0048] In this embodiment, the water flow in the dynamic water tank is transported to the scour simulation box through a water pipe, and its design needs to ensure the stability and leakage of the water flow during the transmission process. In order to achieve the adjustment of different speeds, the water flow in the water pipe is pressurized by a pressure pump to adjust the flow rate of the water flow. The pressure pump can adjust the pressure according to the experimental requirements to simulate the anti-scour performance of the grouting material under different flow rates. Dynamic water tank: The dynamic water tank is a container for storing experimental water, and it is also the starting point for water flow pressurization. Subsequently, the waste liquid pipe is used to drain the slurry after scouring to the waste liquid treatment box for subsequent treatment and recycling to achieve the recycling of resources.

[0049] The specific process of implementing the first step is as follows:

[0050] Ensure that the thermostatic system is working properly and set and maintain the required constant water temperature. Connect the water pipes to the dynamic water tank and the flushing simulation box, and ensure that there are no leaks in the connection. Start the booster pump and adjust the pressure according to the experimental requirements to obtain the required water flow rate. Monitor and record the water flow rate and temperature to ensure that the experimental conditions meet the preset parameters.

[0051] Through the above steps, the stable operation of the dynamic water scouring system can be ensured, providing a reliable basis for the subsequent simulation experiment of the anti-scouring performance of the grouting material.

[0052] The second step is to design the slurry control system, including slurry storage pipes, slurry delivery pipes and flow meters, which are used to transport and control the quality of the slurry.

[0053] In specific use, in order to accurately control the delivery and quality of the slurry in the experiment, a slurry control system needs to be added. The system is mainly composed of a slurry storage pipe, a slurry delivery pipe and a flow meter. Its purpose is to ensure that the slurry can be accurately delivered to the scour simulation box according to the experimental requirements.

[0054] The slurry storage pipe is used to store the grouting material to be tested. Its design needs to ensure the safe storage of the slurry and prevent the slurry from settling or separating during storage. The slurry delivery pipe connects the slurry storage pipe and the scour simulation box, and is responsible for transporting the slurry from the slurry storage pipe to the test box. The material and quality of the slurry delivery pipe need to ensure that the slurry will not be contaminated or damaged during transportation. The flow meter is used to monitor and record the flow rate of the slurry in the slurry delivery pipe in real time, so as to calculate and control the quality of the slurry delivered to the scour simulation box. The accuracy of the flow meter directly affects the accuracy of the experimental data.

[0055] The following are the specific implementation steps:

[0056] Prepare the grouting material according to the proportion required by the experiment and store it in the slurry storage pipe. Connect one end of the slurry delivery pipe to the slurry storage pipe and the other end to the slurry inlet of the scouring simulation box. Start the flow meter and calibrate it to zero to ensure that the flow meter can accurately measure the flow rate of the slurry. Open the valve of the slurry delivery pipe, start delivering the slurry, and monitor the flow data in real time through the flow meter. According to the data of the flow meter, adjust the slurry delivery speed to ensure that the appropriate amount of slurry is delivered according to the experimental design.

[0057] Through this step, the accurate delivery and effective control of the slurry during the experiment can be ensured, providing a stable and reliable slurry supply for the simulation experiment.

[0058] The third step is to manufacture an erosion simulation box, including a smooth flat bottom plate, bottom plates with different roughness, and boxes filled with different media to simulate different experimental conditions.

[0059] In this embodiment, in order to simulate the anti-scour performance of the grouting material under different conditions, a variety of different scour simulation environments are designed and manufactured. In this embodiment, only three different types of scour simulation boxes are introduced, including a smooth flat bottom box, a bottom box with different roughness, and a box filled with different media. Each box can simulate a specific engineering environment, so as to more accurately evaluate the anti-scour performance of the grouting material.

[0060] For smooth flat bottom plate box: This box is mainly used to simulate the anti-scouring performance of grouting materials on smooth interfaces. The bottom plate is processed with high precision to ensure the smoothness of the surface and reduce experimental errors.

[0061] Box for different roughness bottom plates: This box simulates the anti-scouring performance of grouting materials on different roughness interfaces by installing bottom plates with different roughness. The change of bottom plate roughness can be achieved through special surface treatment technology.

[0062] For boxes filled with different media: The box is filled with different types of media, such as sand, gravel, etc., to simulate different geological conditions that grouting materials may encounter in actual projects.

[0063] The following are the specific implementation steps:

[0064] Manufacture of boxes: According to the design drawings, three different types of scour simulation boxes are manufactured using appropriate materials to ensure the structural strength and sealing of the boxes.

[0065] Bottom plate treatment: For smooth flat bottom plates, precision machining is used; for bottom plates with different roughness, different surface treatment technologies are used to obtain the required roughness.

[0066] Filling medium: In a box filled with different media, select the appropriate medium according to the experimental requirements and fill it evenly into the box to ensure the density and stability of the medium.

[0067] Weighing equipment installation: Weighing equipment is installed at the bottom of each box to monitor and record the quality changes of the slurry in real time.

[0068] In this embodiment, a comprehensive simulation of the anti-scouring performance of the grouting material is achieved, providing a variety of test conditions for the experiment, thereby more accurately evaluating the performance of the grouting material in different engineering environments.

[0069] The fourth step is to analyze the retention rate of slurry under different conditions through experimental data and evaluate the anti-scouring performance of the grouting material.

[0070] In this embodiment, in order to accurately evaluate the anti-scour performance of the grouting material under different conditions, the following detailed steps are taken to collect and analyze the experimental data:

[0071] Data collection: During the experiment, the mass change of the slurry in each scouring simulation box was recorded by weighing equipment. The recorded data included the initial mass, the mass during the experiment, and the mass after the experiment.

[0072] Data preprocessing: Preprocess the collected data to eliminate experimental errors and outliers, ensuring the accuracy and reliability of the data.

[0073] The following are the specific implementation steps:

[0074] 1) Experimental data record:

[0075] Under each experimental condition, the initial mass of the slurry was recorded, at set time points, the mass of the slurry was recorded, and after the experiment, the final mass of the slurry was recorded.

[0076] 2) Calculate the slurry retention rate:

[0077] The calculation formula of slurry retention rate is:

[0078]

[0079] Among them, R represents the slurry retention rate, M final Represents the mass of slurry in the box after the experiment, M initial Represents the initial slurry mass (i.e. box mass).

[0080] 3) Data analysis:

[0081] The slurry retention rates under different experimental conditions were compared, and the differences in anti-scouring performance between smooth surfaces, surfaces with different roughness, and surfaces filled with different media were analyzed.

[0082] Analysis of variance (ANOVA) was used to determine whether the different conditions had a significant effect on the slurry retention rate.

[0083] If the effect is significant, multiple comparison methods (such as Tukey's HSD) are further used to identify which specific conditions are significantly different.

[0084] The anti-scouring performance of the grouting material is evaluated according to the retention rate R. The higher the retention rate, the better the anti-scouring performance of the material.

[0085] At this point, the anti-scour performance of grouting materials under different experimental conditions can be systematically evaluated, and a scientific basis can be provided for engineering practice.

[0086] Assume that in an experiment with a smooth flat bottom, the initial mass M initial is 1000g, and the mass M after the experiment is completed final If the initial mass is 750g and the final mass is 600g, the slurry retention rate R is 75%. Under another medium condition filled with sand and gravel, if the initial mass is 1000g and the final mass is 600g, the slurry retention rate R is 60%. By comparing the retention rates under these two conditions, it can be concluded that the anti-scouring performance of the grouting material on the smooth surface is better than that in the sand and gravel medium.

[0087] Step 5. Compare the experimental results of different boxes and analyze the relationship between the anti-scouring performance of the grouting material and the roughness and medium.

[0088] In this embodiment, after completing the collection of experimental data, the next step is to compare and analyze the experimental results of different boxes to explore the relationship between the anti-scouring performance of the grouting material and the roughness and medium. The following are the specific comparative analysis steps:

[0089] Comparison of experimental results: The experimental data of the box with a smooth flat bottom plate (box 41), the box with bottom plates of different roughness (box 42) and the box filled with different media (box 43) are sorted and compared.

[0090] The slurry retention rates of each box under different water flow rates were compared to evaluate the anti-scouring performance of the grouting material under different conditions.

[0091] Data analysis methods:

[0092] The experimental data were processed using statistical methods, such as analysis of variance (ANOVA) to determine whether the effects of roughness and media on slurry retention were significant.

[0093] If there is a significant difference, a multiple comparison test (such as Tukey's HSD test) is further used to identify the specific conditions under which the difference is significant.

[0094] According to the experimental results, the relationship between the anti-scouring performance and roughness of the grouting material is analyzed. Generally speaking, an increase in roughness will lead to a decrease in slurry retention rate, indicating a weakening of the anti-scouring performance.

[0095] Similarly, the relationship between the anti-scouring performance of the grouting material and the medium is analyzed. Different media may have different effects on the loss of slurry. For example, sand and gravel media may accelerate the loss of slurry, while denser media may reduce the loss.

[0096] The following are the specific implementation steps: Organize experimental data: Organize the slurry retention rate data of each box under different conditions and prepare for statistical analysis. Perform variance analysis: Use variance analysis to test whether the effect of roughness and medium on slurry retention rate is significant. Multiple comparison test: If the variance analysis results show a significant difference, perform a multiple comparison test to determine the specific difference. Draw a chart: Based on the analysis results, draw a chart to intuitively show the relationship between the anti-scouring performance of the grouting material and the roughness and medium.

[0097] If the slurry retention rate of box 42 is generally lower than that of box 41, it indicates that the anti-scouring performance of the grouting material decreases with the increase of roughness.

[0098] If the slurry retention rate of box 43 is significantly different from that of boxes 41 and 42, it means that the medium type has a significant effect on the anti-scouring performance of the grouting material.

[0099] Analyses like the above not only help us understand the factors affecting the anti-scouring performance of grouting materials, but also provide a scientific basis for selecting appropriate grouting materials and construction methods in engineering practice.

[0100] In order to match the above method, a simulation test device for the anti-scour performance of grouting materials is also added; refer to the attached Figure 2-9 As shown, the scour resistance simulation test device for grouting materials in this embodiment includes a dynamic scour mechanism connected to a constant temperature box 1, and the outflow box 4 in the dynamic scour mechanism is diverted to at least three scour simulation boxes 40 with different smoothness through a diversion mechanism, and the outflow outlet of each scour simulation box 40 is connected to a waste liquid storage box 13 through a waste liquid pipe 17; in the test, in order to ensure better impact and flow, a speed regulating mechanism is added during diversion in this embodiment to meet the adjustment of different speeds, and different effects of water flow velocities entering different scour simulation boxes 40 can also be achieved, making it possible to simulate more environments.

[0101] When the slurry flows, the slurry flowing out of the slurry storage tank 11 in this embodiment flows out from the slurry outlet 5, and under the action of the slurry control mechanism, it flows through the slurry delivery pipe 12 to the corresponding flushing simulation box 40, and after being guided by the guiding mechanism to flow into the set flushing cavity, it impacts with the water flow with speed, and after being impacted by the water flow with speed, it flows out through the waste liquid pipe into the waste liquid storage tank 13.

[0102] In the above process, due to the existence of multiple scour simulation boxes, scour cavities with different rough surfaces or performances are formed in each scour simulation box, and then impacted by combining different water flow velocities and slurry velocities, and finally flowing out, the performance simulation is completed through the quality difference, achieving multiple goals at one stroke.

[0103] In this embodiment, the provision of multiple performance flushing chambers satisfies simultaneous detection and simulation tests of different performances, achieving multiple goals at one stroke and improving the overall detection efficiency.

[0104] First, the following is an introduction to the diversion institutions:

[0105] In this embodiment, the diversion mechanism includes a water delivery pipe 9 connected to the outflow box 4, and a water delivery branch 6 arranged in parallel at the output end of the water delivery pipe 9 and connected to the flushing simulation box 40 in a one-to-one correspondence. Each water delivery branch 6 is provided with a pressure valve 7 and a first flow meter 8 forming a speed regulating mechanism. When specifically connected, the constant temperature water in the constant temperature box 1 is first transported to the outflow box 4 through the water delivery pipe 3, and then the water in the outflow box 4 first flows into a plurality of water delivery branches 6 through the water delivery pipe 9, and each water delivery branch 6 is connected to a flushing simulation box 40. During the constant temperature water circulation, each water delivery branch 6 is provided with a pressure valve 7 to pressurize and adjust the speed, and then the speed is measured by the first flow meter 8.

[0106] Secondly, regarding grouting control.

[0107] In this embodiment, when the slurry flows in, the outlet of the specific slurry mechanism passes through the slurry delivery pipe 12, passes through the slurry distribution pipe 10, and flows into the slurry inlet 19 at the top of the scouring simulation box 40.

[0108] In order to prevent the slurry from flowing to other places, the guiding mechanism includes a top plate 20 located inside the slurry inlet 19 and having a tube hole 28, and wind pressure output plates 27 located on both sides of the top plate 20, and the wind pressure output plates 27 form a guiding path that gathers toward the top plate. In this case, there are two wind pressure output plates 27, which are respectively arranged on both sides of the top plate, and then connected to the pressure mechanism, so that the airflow in the box is concentrated toward the top plate under the action of pressure and does not flow out.

[0109] Next, three types of flushing simulation cabinets are introduced.

[0110] In this embodiment, more types of scour simulation boxes can actually be set. For example, when four different construction surfaces are required, four types of scour simulation boxes are set. In this embodiment, refer to Figure 1-2 It can be seen that three scour simulation boxes with different smoothness are set, specifically including at least a first scour simulation box 41 with a smooth inner wall, a second scour simulation box 42 with a rough inner wall, and a third scour simulation box 43 filled with a medium structure. The specific roughness and medium structure can be selected according to needs.

[0111] The first scour simulation box 41 in this embodiment includes a water inlet 22 and a liquid outlet 31 located in the lower part of the first scour simulation box 41, and a scour cavity is provided between the water inlet 22 and the liquid outlet 31, which is connected by at least a smooth surface 24, and then the slurry and water are impacted in the scour cavity.

[0112] Refer to the attached Figure 5 As shown, the flushing chamber includes a bottom plate with a smooth surface 24 and a first lateral baffle 23 and a second lateral baffle 25 located on both sides of the bottom plate. The distance between the first lateral baffle 23 and the second lateral baffle 25 is greater than the diameter of the water inlet 22, thereby facilitating the outflow and impact of water and slurry.

[0113] The second scour simulation box 42 includes a rough bottom plate 30 which forms the bottom of the second scour simulation box and has a rough surface. Both ends of the rough bottom plate 30 are connected to the water inlet 22 and the liquid outlet 31. At this time, the rough bottom plate is added, and its surface is a rough surface, and thus has a certain degree of roughness.

[0114] The third scour simulation box 43 includes a water inlet 22 and a liquid outlet 31 located in the middle and lower part, and at least the middle and lower part of the third scour simulation box is filled with a medium structure 26 below the water inlet 22 and the liquid outlet 31. At this time, the medium structure 26 can be placed according to demand, and then the anti-scour of the grouting material under the medium structure is simulated to perform performance monitoring.

[0115] like Figure 2-3 As shown, the scour resistance simulation experimental device of the grouting material under different conditions in this embodiment is composed of three parts: a dynamic water scour system, a slurry control system, and a scour simulation box.

[0116] The dynamic water flushing system is mainly composed of a constant temperature box 1, a water pipe 3, an outflow box 4, a water delivery branch 6, a pressure valve 7, a water delivery main pipe 9, a waste liquid storage box 13, a waste liquid pipe 17, etc., and the above structures are all assembled on the base 2. The dynamic water flushing system is divided into three water delivery routes, which are the dynamic water flowing out of the constant temperature box 1 and the outflow box 4, passing through the water delivery main pipe 9 and the water delivery branch 6, passing through the pressure valve 7 on the way to change the dynamic water flow rate, and reaching the water inlet 22 of each flushing simulation box 40. The waste liquid flushed by the dynamic water flows out from the liquid outlet 31 and flows into the waste liquid storage box 13 through the waste liquid pipe 17.

[0117] The water flows out from the thermostat 1 and the outflow box 4, passes through the water delivery pipe 9 and the water delivery branch 6, passes through the pressure valve 38 on the way to change the dynamic water flow rate, and reaches the water inlet 22 of the second flushing simulation box 42. The waste liquid flushed out by the dynamic water flows out from the liquid outlet 31, and flows into the waste liquid storage box 13 through the waste liquid pipe 17. The dynamic water flows out from the thermostat 1 and the outflow box 4, passes through the water delivery pipe 9 and the water delivery branch 6, passes through the pressure valve 7 on the way to change the dynamic water flow rate, and reaches the water inlet 22 of the third flushing simulation box 42. The waste liquid flushed out by the dynamic water flows out from the liquid outlet, and flows into the waste liquid storage box 13 through the waste liquid pipe 17.

[0118] The slurry control system adds a second flow meter 14 and a slurry pressure valve, and its working principle is to transport the slurry through the slurry storage tank 11, the slurry delivery pipe 12, etc., and then through the slurry inlet 19 to different flushing simulation boxes 40.

[0119] For the first scour simulation box 41, it is mainly a smooth plane scour simulation box, and its working principle is mainly that the slurry slowly flows into the box from the pipe hole 28 at the slurry inlet. At this time, in order to prevent the slurry from entering the box directly from the pipeline and being unevenly distributed, the pipe hole 28 is set. Then, in order to prevent the slurry from being distributed around the pipe hole and not being able to fully flow into the box from the pipe hole, the wind pressure output plates 27 on the left and right sides of the pipe hole can make the slurry fully flow onto the bottom plate with a smooth surface 24. Then, dynamic water with different flow rates flows into the box simulation from the water inlet 22, and the anti-scour performance of the grouting material on the smooth floor under different water flow rates is simulated. Finally, part of the slurry flows out from the outlet under the action of dynamic water scouring. According to the formula, slurry retention rate = retained slurry / total mass of slurry, where the total mass of slurry is the weight before dynamic water scouring, and the retained slurry is the weight after dynamic water scouring.

[0120] The rough plane scour simulation box formed by the second scour simulation box 42 has a working principle that the slurry slowly flows into the box from the pipe hole 28 at the slurry inlet. In order to prevent the slurry from being distributed around the pipe hole and not being able to fully flow into the box from the pipe hole, the wind pressure output plates on the left and right sides of the pipe hole can allow the slurry to fully flow onto the rough bottom plate 30. Then, dynamic water with different flow rates flows into the box simulation from the water inlet, and the anti-scour performance of the grouting material on the floor with different roughness under different water flow rates is simulated. Finally, part of the slurry flows out from the outlet under the action of dynamic water scouring. According to the formula, slurry retention rate = retained slurry / total mass of slurry, where the total mass of slurry is the weight before dynamic water scouring, and the retained slurry is the weight after dynamic water scouring. Calculate the anti-scour performance of the slurry on planes with different water flow rates and different roughness.

[0121] For the third scour simulation box 43, which is filled with different media scour simulation boxes, the working principle is mainly that the slurry flows from the slurry inlet. In order to prevent the slurry from entering the box directly from the pipeline and being unevenly distributed, the slurry is now slowly flowed from the pipe hole into the box. In order to prevent the slurry from being distributed around the pipe hole and not being able to fully flow into the box from the pipe hole, the wind pressure output plates on the left and right sides of the pipe hole can fully flow into the medium gap in the simulation box. Then, dynamic water with different flow rates flows into the box simulation from the water inlet hole, and the anti-scour performance of the grouting material filled with different media under different water flow rates is simulated. Finally, part of the slurry flows out from the outlet 39 under the action of dynamic water scouring. According to the formula, slurry retention rate = retained slurry / total mass of slurry, where the total mass of slurry is the weight before dynamic water scouring, and the retained slurry is the weight after dynamic water scouring. Calculate the anti-scour performance of the slurry at different water flow rates and different filling media.

[0122] In this embodiment, the waste liquid storage box 13 is connected to the slurry storage tank 11 through the connecting pipe 15, providing a basis for subsequent reuse.

[0123] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0124] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A simulation test method for the anti-brushing performance of grouting materials under different conditions, characterized in that: The following steps are included: Build a dynamic water flushing system; The dynamic water flushing system adjusts the speed so that the water in the constant temperature water mechanism is diverted to several flushing simulation environments with different roughness interfaces according to the set speed and temperature; The slurry control system controls the slurry to flow into a plurality of scouring simulation environments of interfaces with different roughnesses according to a set flow rate; Collect the initial mass at different rates, the changing mass during the experiment, and the final mass after the end of each scour simulation environment; According to the formula, slurry retention rate = retained slurry / total slurry mass; the scouring performance of simulated interfaces with different roughness at different speeds is calculated; The scouring performance is analyzed, and a relationship diagram between anti-scouring performance, roughness and medium is drawn, and the factor analysis conclusion of the anti-scouring performance of the grouting material is drawn based on the relationship diagram.

2. The method for simulating the anti-brushing performance of grouting materials under different conditions according to claim 1, characterized in that: The steps for constructing a dynamic water flushing system also include constructing a constant temperature water mechanism, specifically a water tank with a built-in temperature controller, a heating mechanism and a cooling mechanism, and the heating mechanism and the cooling mechanism are used to heat or cool the water tank according to the temperature changes in the temperature controller, so that the water tank is always at a constant temperature.

3. The method for simulating the anti-brushing performance of grouting materials under different conditions according to claim 1, characterized in that: The set speed is specifically achieved by controlling the pressure in the dynamic water flushing system through a pressure booster valve.

4. The method for simulating the anti-brushing performance of grouting materials under different conditions according to claim 1, characterized in that: The interfaces with different roughness at least include a smooth surface, a granular rough surface and a medium surface containing blocky medium.

5. The method for simulating the anti-brushing performance of grouting materials under different conditions according to claim 1, characterized in that: In the slurry control system, the slurry is discharged through the slurry delivery pipe via the slurry storage tank to the box of the corresponding scour simulation environment, and the mass of the discharged slurry is recorded in real time via the flow meter.

6. The method for simulating the anti-brushing performance of grouting materials under different conditions according to claim 5, characterized in that: It also includes the production of a box in a scouring simulation environment, specifically: bottom plates with smooth bottom surfaces and rough bottom surfaces are obtained through processing, and an integrated box is formed by processing the bottom plate and the mounting plate, and a weighing device is arranged at the bottom of the box.

7. The method for simulating the anti-brushing performance of grouting materials under different conditions according to claim 1, characterized in that: The medium interface is specifically formed by filling sand and / or gravel of different particle sizes in the box to form different medium surfaces.

8. The method for simulating the anti-brushing performance of grouting materials under different conditions according to claim 1, characterized in that: It also includes the calculation of the anti-brushing performance β by the following formula: β=(G2-G0)(G1-G0) Among them, G0 is the total mass of box B in the scouring simulation environment; G1 is the total mass of the box after the slurry is added; G2 is the retained mass of the box after dynamic water scouring.

9. The method for simulating the anti-brushing performance of grouting materials under different conditions according to claim 1, characterized in that: The analysis of flushing performance also includes determining whether roughness has a significant effect on slurry retention by variance analysis, and if so, using a sampling multiple comparison method to identify significant differences between specific conditions.

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