Test device and method for evaluating the effect of dynamic water on the flow and solidification of synchronous dual slurries

Abstract

The present invention provides a test device for judging the effect of dynamic water on the flow and solidification of synchronous dual slurries, comprising a hollow test box, the test box being a transparent cylindrical structure, a cylindrical pipe segment being arranged axially in the test box, a first water inlet and a second water inlet being respectively provided at both ends of the test box, the first water inlet and the second water inlet being arranged at a position above the top of the pipe segment, the test device also comprising a grouting pipe for grouting the outer wall of the pipe segment, the grouting outlet of the grouting pipe being arranged at the top of the outer surface of the pipe segment, the grouting outlet of the grouting pipe being arranged opposite to the first water inlet or the second water inlet, and a test method of the device is also provided. The test device can simulate the test of the effect of dynamic water on the flow and solidification of slurries when the water flow direction is the same as or opposite to the grouting direction or there is water flow in both directions, and the experimental results can provide a reference basis for actual construction.

Description

Technical Field

[0001] The invention relates to the technical field of shield engineering, and in particular to a test device and method for judging the effect of dynamic water on the flow and solidification of synchronous double slurries. Background Art

[0002] In recent years, my country's urban rail transit construction has developed rapidly, especially the construction of subway lines. As one of the most important construction methods for subway construction, the shield method has gradually expanded its application scope. Due to the vast territory of my country and the obvious differences in hydrogeology in different regions, the problem of pipe segment floating faced by shield construction is becoming more and more prominent. At present, in order to solve the problem of pipe segment floating, the engineering mostly adopts synchronous double-liquid slurry with a shorter initial setting time, and effectively controls the floating by reducing the solidification time of the slurry behind the wall. Synchronous double-liquid slurry refers to the injection of two slurries into the outer wall of the pipe segment after mixing, one of which is a cement-based material and the other is usually a water glass material as a hardener. Different ratios of the double slurries will result in different setting times. However, since the double-liquid slurry is generally mixed behind the pipe segment wall, the diffusion direction and diffusion area of ​​the mixed slurry cannot be detected, resulting in the inability to judge the filling and compacting effect of the slurry behind the wall, and it is very easy to have multiple voids or uncontrollable slurry filling. The current method for analyzing the compaction effect of slurry filling is mainly the wall-behind detection technology after the tunnel segments are assembled. However, due to the influence of the segment steel mesh, the detection effect is not ideal. It can only be simulated through indoor tests to provide a reference basis for on-site construction.

[0003] At present, one of the important factors affecting the solidification effect of synchronous slurry is the influence of groundwater in the stratum. Due to the influence of groundwater in the stratum during the synchronous grouting of shield tunneling, on the one hand, the slurry will be diluted, the initial setting time of the slurry will be prolonged, the fluidity of the slurry will be improved, and the anti-floating effect of the slurry will be reduced; on the other hand, when the groundwater is flowing, when the slurry injection direction is consistent with the groundwater flow direction, the dilution effect of the slurry will be accelerated. When the slurry injection direction is opposite to the groundwater flow direction, the water flow and the slurry will form a certain counteraction effect, affecting the diffusion path and diffusion area of ​​the slurry. At the same time, there are certain differences in the degree of influence of groundwater with different flow rates. At present, there is no experimental device and method that can study the effect of dynamic water on the flow and solidification of synchronous dual-liquid slurry. Summary of the invention

[0004] The purpose of the present invention is to address the defects of the prior art and to provide a test device and method for evaluating the effect of dynamic water on the flow and solidification of synchronous dual slurries. The test device can simulate the test of the effect of dynamic water on the flow and solidification of slurries when the water flow direction is the same as or opposite to the grouting direction or there is water flow in both directions. The experimental results can provide a reference basis for actual construction.

[0005] The present invention provides a test device for judging the effect of dynamic water on the flow and solidification of synchronous dual slurries, comprising a hollow test box, which is a transparent cylindrical structure. A cylindrical pipe segment is axially arranged in the test box, and a first water inlet and a second water inlet are respectively opened at both ends of the test box. The first water inlet and the second water inlet are arranged at a position above the top of the pipe segment. The test device also includes a grouting pipe for grouting the outer wall of the pipe segment, and the grouting outlet of the grouting pipe is arranged at the top of the outer surface of the pipe segment, and the grouting outlet of the grouting pipe is arranged opposite to the first water inlet or the second water inlet.

[0006] Furthermore, the grouting pipe has a slurry inlet extending from the top of the test box, the grouting pipe is slidably connected to the top of the test box, and the grouting pipe can slide along the axial direction of the test box to change the position of the slurry outlet of the grouting pipe.

[0007] Furthermore, a slide groove is provided on the top of the test box along the axial direction, a pulley is provided on the grouting pipe, and the pulley is slidably arranged in the slide groove.

[0008] Furthermore, a fixing piece is provided at a position of the grouting pipe close to the slurry outlet, and the fixing piece is axially slidably connected to the top of the pipe segment.

[0009] Furthermore, the grouting pipe is provided with a third valve for switching and a pressure gauge for detecting the slurry pressure.

[0010] Furthermore, the first water inlet and the second water inlet are respectively connected to the first water inlet pipe and the second water inlet pipe, the first water inlet pipe and the second water inlet pipe are both provided with a flow meter and a booster for controlling the water flow rate, and the first water inlet pipe and the second water inlet pipe are respectively provided with a first valve and a second valve for switching.

[0011] Furthermore, the first water inlet pipe and the second water inlet pipe are both provided with a pressure stabilizer for stabilizing the water flow rate.

[0012] The present invention also provides a test method for judging the effect of dynamic water on the flow and solidification of synchronous dual slurries, comprising the following steps:

[0013] S100, adjusting the position of the grouting pipe at the top of the pipe segment, and recording the distance between the grouting outlet of the grouting pipe and the first water inlet or the second water inlet;

[0014] S200, through the grouting pipe at a flow rate v m Inject slurry with a concentration ratio of A, and at the same time pass through the first water inlet and / or the second water inlet at a flow rate v n Fill the test chamber with water;

[0015] S300. After time T, stop grouting and water injection, and analyze the slurry remaining on the segment.

[0016] Furthermore, in step S300, analyzing the slurry remaining on the pipe segment includes: analyzing the volume, mass and contour of the slurry remaining on the pipe segment.

[0017] Furthermore, the step S200 further includes: recording the slurry remaining on the pipe segment once at each time interval t0.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention utilizes a test box to simulate surrounding rock, a pipe segment to simulate a tunnel structure, injects water between the test box and the pipe segment through the first water inlet and / or the second water inlet, and injects grout to the top of the pipe segment through the grouting pipe, so as to simulate the test of the flow and solidification effect of dynamic water on the slurry when the water flow direction is the same as or opposite to the grouting direction or there is water flow in both directions.

[0020] 2. The present invention can reveal the influence of water flows with different flow rates on the setting time and dilution of the slurry when the flowing water flow is consistent with the slurry injection direction through the test of the flow and solidification effect of dynamic water on the synchronous double slurries, and determine the minimum initial setting time of the slurry and the diffusion law of the slurry at different water flow rates; when the flowing water flow is in opposite directions to the slurry injection direction, the regular characteristics of the influence of water flows with different flow rates on the setting time and dilution of the slurry when they impact the slurry, and determine the minimum initial setting time of the slurry and the diffusion law of the slurry at different water flow rates.

[0021] 3. The present invention can directly observe the mixing process of the synchronous double slurries behind the pipe segment wall under dynamic water conditions through a transparent test box, and clarify the flow, coagulation state and filling effect of the slurries after mixing.

[0022] 4. The present invention can simulate the test of slurry at different grouting points by slidingly connecting the grouting pipe with the test box. Different points have different distances from the first water inlet or the second water inlet. The concentration setting of the double slurry and the optimal solution of the slurry ratio under different excavation speeds can be determined, providing a reference basis for actual construction.

[0023] 5. The present invention simulates the actual grouting process by slidingly connecting the grouting pipe with the test box and the pipe segment so that the slurry outlet of the grouting pipe moves along the axial direction of the pipe segment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 is a side view of the test box of the present invention;

[0026] Figure 3 It is the outline diagram of the slurry-attached pipe segment of the present invention;

[0027] Figure 4The relationship curve between the final mass of the slurry remaining on the segment and the water flow velocity at different slurry ratios and different grouting points;

[0028] Figure 5 The curve is the relationship between the ratio of the mass of slurry remaining on the segment and the final mass of slurry after the test changes with time under different slurry ratios and different water flow rates.

[0029] Figure numerals: 1-test box; 2-segment; 3-support rod; 4-drainage outlet; 5-end plate; 6-grouting pipe; 7-chute; 8-pulley; 9-fixing part; 10-third valve; 11-pressure gauge; 12-base; 13-bracket; 14-first water inlet pipe; 15-second water inlet pipe; 16-booster; 17-pressure stabilizer; 18-flow meter; 19-first valve; 20-second valve; 21-first water inlet; 22-second water inlet. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] like Figure 1 As shown, it is a schematic diagram of the structure of the test device, which includes a hollow test box 1, which is a transparent cylindrical structure, and a cylindrical pipe segment 2 is axially arranged in the test box 1. The first water inlet 21 and the second water inlet 22 are respectively opened at both ends of the test box 1, and the first water inlet 21 and the second water inlet 22 are arranged at a position above the top of the pipe segment 2. The test device also includes a grouting pipe 6 for grouting the outer wall of the pipe segment 2, and the grouting outlet of the grouting pipe 6 is arranged at the top of the outer surface of the pipe segment 2, and the grouting outlet of the grouting pipe 6 is arranged opposite to the first water inlet 21 or the second water inlet 22.

[0032] Specifically, Figure 2 As shown, end plates 5 are fixedly provided at both ends of the test box 1. The end plates 5 are square and can prevent the cylindrical structure of the test box 1 from rolling during the experiment. The pipe segment 2 can be composed of multiple pipe segment 2 units spliced ​​together, or it can be directly processed into an integrated structure without affecting the test results. Bolt holes are provided at the bottom of the pipe segment 2, and bolt holes are also provided on the inner wall of the bottom of the test box 1. The pipe segment 2 is fixed in the test box 1 by support rods 3 with threads at both ends, which is convenient for disassembly and will not be mechanically stuck by the solidified slurry. In addition, support rods 3 of different lengths can be selected as needed to change the height of the pipe segment 2; the two ends of the pipe segment 2 are closed to prevent slurry or water from entering, and the two ends of the pipe segment 2 do not abut against the test box 1, so that the disassembly and cleaning of the pipe segment 2 after the test is completed is more convenient.

[0033] It can be understood that the test box 1 is equivalent to the surrounding rock structure after excavation, and the segment 2 is formed after the segment 2 is installed. Grouting is required between the inner wall of the test box 1 and the outer wall of the segment 2. The role of grouting is not only to inhibit the relaxation of the stratum around the segment 2 and prevent and reduce surface deformation, but also to improve the stress condition of the segment 2, reduce the settlement of the tunnel itself, increase the waterproof performance of the segment 2, and form an effective waterproof layer.

[0034] For water-rich strata, the groundwater is in a balanced state before excavation of the pipe segment 2. After excavation, the original groundwater balance is broken, and the groundwater will flow from above the pipe segment 2 to the top of the pipe segment 2. Therefore, the first water inlet 21 and the second water inlet 22 need to be arranged above the top of the pipe segment 2. When it is necessary to simulate pipe segments 2 of different diameters, it is only necessary to replace the support rods 3 of different lengths to meet the condition that the first water inlet 21 and the second water inlet 22 are above the top of the pipe segment 2.

[0035] The slurry outlet of the grouting pipe 6 is arranged along the axial direction of the pipe segment 2, and the first water inlet 21 and the second water inlet 22 are set at the two ends of the test box 1. Therefore, the slurry outlet will be arranged opposite to the first water inlet 21 or the second water inlet 22, thereby forming three working conditions of grouting with the water flow or against the water flow and water flow at both ends. Therefore, the test device can simulate and analyze the flow and solidification effects of synchronous dual-slurry grouting under the above three working conditions.

[0036] In some embodiments, the grouting pipe 6 has a slurry inlet extending from the top of the test box 1 , and the grouting pipe 6 is slidably connected to the top of the test box 1 . The grouting pipe 6 can slide along the axial direction of the test box 1 to change the position of the slurry outlet of the grouting pipe 6 .

[0037] It can be understood that by changing the position of the grout outlet of the grouting pipe 6 at the top of the pipe segment 2, the different distances between the grouting point and the leaking point in the actual construction process can be simulated.

[0038] Furthermore, a slide groove 7 is axially provided on the top of the test box 1 , and a pulley 8 is provided on the grouting pipe 6 , and the pulley 8 is slidably disposed in the slide groove 7 .

[0039] Specifically, the top of the test box 1 is provided with a long strip opening and two slide grooves 7 parallel to the opening in the axial direction. The two slide grooves 7 are located on both sides of the opening. The grouting pipe 6 extends into the test box 1 from the opening. The grouting pipe 6 is symmetrically provided with two pulleys 8, which are respectively slidably arranged in the two slide grooves 7. The grouting pipe 6 is made of hard material. The grouting pipe 6 will not shake during the grouting process, thereby ensuring the accuracy of the test. When the grouting pipe 6 is pushed, the grouting pipe 6 will move axially along the pipe segment 2, thereby changing the position of the grouting outlet.

[0040] Furthermore, a fixing part 9 is provided at a position of the grouting pipe 6 close to the grout outlet, and the fixing part 9 is axially slidably connected to the top of the pipe segment 2 .

[0041] Specifically, a segment slide groove is opened at the top of the outer surface of the segment, and the segment slide groove is arranged along the axial direction of the segment. The fixing part 9 can be a bolt or a clamp ring. One end of the fixing part 9 is stuck in the segment slide groove 7 and can slide along the segment slide groove 7. The other end of the fixing part 9 is fixedly connected to the grouting pipe 6, which can prevent the grouting pipe 6 from swinging during grouting.

[0042] It can be understood that, during the test, by pushing the portion of the grouting pipe 6 extending out of the test box 1 , the grout outlet of the grouting pipe 6 can be moved along the axial direction of the pipe segment, thereby simulating the actual grouting process.

[0043] In some embodiments, the grouting pipe 6 is provided with a third valve 10 for switching and a pressure gauge 11 for detecting the slurry pressure.

[0044] The pressure gauge 11 can monitor the flow rate of the injected slurry. When the pressure of the pressure gauge 11 is stable, it means that the flow rate of the injected slurry is stable.

[0045] In some embodiments, the first water inlet 21 and the second water inlet 22 are respectively connected to the first water inlet pipe 14 and the second water inlet pipe 15, the first water inlet pipe 14 and the second water inlet pipe 15 are both provided with a flow meter 18 and a booster 16 for controlling the water flow rate, and the first water inlet pipe 14 and the second water inlet pipe 15 are respectively provided with a first valve 19 and a second valve 20 for switching.

[0046] Specifically, the first water inlet pipe 14 and the second water inlet pipe 15 are supported by a bracket 13, one end of the bracket 13 is fixed to the first water inlet pipe 14 or the second water inlet pipe 15, and the other end is provided with a base 12, and the booster 16 is used to adjust different water flow speeds to simulate working conditions under different water flow speeds.

[0047] Furthermore, the first water inlet pipe 14 and the second water inlet pipe 15 are both provided with a pressure stabilizer 17 for stabilizing the flow rate of water.

[0048] The pressure stabilizer 17 can stabilize the water pressure and prevent the water flow velocity from changing and affecting the adhesion and solidification of the slurry, thereby affecting the experimental results.

[0049] In some embodiments, a drain port 4 is also provided at the bottom of the test box 1 .

[0050] In some embodiments, the outer surface of the test box 1 is provided with horizontal and vertical scales to facilitate adjustment of the position of the grouting pipe 6 and the height of the pipe segment 2 .

[0051] The above test device can be used to evaluate the effect of dynamic water on the flow and solidification of synchronous dual slurries. The specific test methods include:

[0052] S100, adjusting the position of the grouting pipe 6 at the top of the pipe segment 2, and recording the distance between the grouting outlet of the grouting pipe 6 and the first water inlet 21 or the second water inlet 22;

[0053] Specifically, according to the pre-set test conditions, the grouting pipe 6 is pushed and the position of the slurry outlet of the grouting pipe 6 at the top of the pipe segment 2 is adjusted. The distance between the slurry outlet of the grouting pipe 6 and the first water inlet 21 can be directly recorded according to the scale on the outer surface of the test box 1. This distance is the distance between the grouting point and the leakage point.

[0054] S200, through the grouting pipe 6 at a flow rate v m The slurry with a concentration ratio of A is injected, and at the same time, the slurry is injected through the first water inlet 21 and / or the second water inlet 22 at a flow rate v n Fill the test chamber 1 with water;

[0055] Specifically, according to the pre-set test conditions, the third valve 10 and the first valve 19 are opened, and the slurry with a concentration ratio of A is passed through the grouting pipe 6 at a flow rate v m Inject into the top of the pipe segment 2, and water is introduced from the first water inlet pipe 14 at a flow rate v n Fill the test chamber 1 with water.

[0056] S300. After time T, stop grouting and water injection, and analyze the slurry remaining on the pipe segment 2.

[0057] Specifically, the slurry after flowing out first diffuses downward from the top to the side of the segment 2. Due to the different slurry ratios and water flow rates, the flushing effects of the water flow on the slurry are also different, resulting in different residual sizes of the slurry attached to the outer wall of the segment 2. After time T, the third valve 10 and the first valve 19 are closed, the grouting and water injection are stopped, and the slurry remaining on the segment 2 under this working condition is analyzed.

[0058] Furthermore, in step S300, analyzing the slurry remaining on the pipe segment 2 includes: analyzing the volume, mass and contour of the slurry remaining on the pipe segment 2, such as Figure 3 As shown, the contour line of the cross section of the residual slurry on the pipe segment 2.

[0059] Since the test box 1 is transparent, the contour line of the residual slurry on the pipe segment 2 can be scanned by a three-dimensional laser scanner. Through the pipe segment 2, the test box 1 and the contour line of the residual slurry, area and volume analysis can be performed using CAD and other software. The volume and mass of the slurry remaining on the pipe segment 2 can be obtained in combination with the density of the slurry. The influence of water flows with different flow rates and different flushing directions on the diffusion and solidification effect of the synchronous double slurry can be analyzed to determine the effective utilization rate of the slurry in a dynamic water environment. After the test is completed, when the slurry is completely solidified, the strength of the solidified slurry remaining on the pipe segment 2 can be tested to determine the influence of water flows with different flow rates and different flushing directions on the strength of the synchronous double slurry after solidification.

[0060] The step S200 further includes: analyzing the slurry remaining on the pipe segment 2 once at each time interval t0.

[0061] By conducting an analysis once at interval time t, the whole process of the influence of water flow with different flow rates and different flushing directions on the synchronous dual slurry is monitored and compared.

[0062] In addition, when no water is flowing into the first water inlet pipe 14 and the second water inlet pipe 15, the device can be used to conduct experimental research on the synchronous dual slurry flow and solidification effect under the condition of no groundwater.

[0063] The following is a detailed explanation using the example that the direction of groundwater flow is opposite to the direction of grouting slurry:

[0064] After the test box 1 is installed, close the first valve 19 and the second valve 20, place the grouting pipe 6 on the top of the pipe segment 2 through the upper opening of the test box 1, and fix the grouting port of the grouting pipe 6 at the first point. The grouting ports of the grouting pipe 6 at different points are at different distances from the first water inlet 21. After all the fixed installations are completed, open the first valve 19 on the left, and evenly inject the water flow with a flow rate of v1 into the test box 1. At the same time, open the third valve 10, and inject the synchronous double slurry with a ratio of A and a volume of V through the grouting pipe 6. The slurry can reflect the pressure monitoring value in real time after passing through the pressure gauge 11. The slurry flows out horizontally to the left at the top of the pipe segment 2 at a flow rate of v0. The slurry after flowing out first diffuses downward from the top to the two ends of the pipe segment 2, and part of the slurry adheres to the outer surface of the pipe segment 2. After a certain time T, close the first valve 19 and the third valve 10, and use a three-dimensional laser scanner to scan the contour line of the residual slurry on the outer wall of the pipe segment 2. Through the pipe segment 2, the box body and the residual slurry contour line, use CAD and other software to perform area and volume analysis, and combine the density of the slurry to obtain the mass of the slurry remaining on the pipe segment 2; every time interval t0, use a three-dimensional laser scanner to scan the contour line of the residual slurry on the wall of the pipe segment 2, and analyze the situation of the slurry remaining on the pipe segment 2.

[0065] After the test is completed, the left and right fixed plates of the test box 1 are removed, the slurry inside the test box 1 and the slurry attached to the pipe segment 2 are cleaned, and the test box 1 is reassembled. The above operations are repeated to carry out tests with water flow velocities of v2, v3, slurry ratios of B and different points. Due to the different slurry ratios, the flushing effect of the horizontal water flow and the differences in the characteristics of the slurry itself, the amount of slurry attached to the wall of the pipe segment 2 is different. By comparing the volume and mass of the slurry attached to the pipe segment 2 and the injected slurry, the diffusion and solidification effects of different flow rates and different slurry ratios on the synchronous double slurries can be analyzed, so as to judge the effective utilization rate of the slurry in the dynamic water environment.

[0066] Figure 4 and Figure 5 is the correlation curve obtained from the above test, Figure 4 The relationship curve between the final mass of the slurry remaining on the pipe segment 2 and the water flow velocity under different slurry ratios and different grouting points. The horizontal axis v represents the water flow velocity, and the vertical axis m represents the water flow velocity. v Represents the final mass of the slurry remaining on the segment 2, from Figure 4 It can be seen that with the increase of water flow velocity v, the final mass of the slurry remaining on the pipe segment 2 gradually decreases. Under different points or slurry ratios, the change law of the final mass of the slurry remaining on the pipe segment 2 is not completely the same. Figure 5 The curve is the relationship between the ratio of the slurry mass remaining on the pipe segment 2 and the final mass of the slurry after the test under different slurry ratios and different water flow rates. The horizontal axis T represents time and the vertical axis m represents time. t It represents the ratio of the mass of the slurry remaining on the segment 2 at time t to the final mass of the slurry after the test. Figure 5 It can be seen that with the increase of time T, the ratio of the mass of the slurry remaining on the segment 2 to the final mass of the slurry after the test gradually increases. Under different slurry ratios or water flow rates, the maximum value of the ratio of the mass of the slurry remaining on the segment 2 to the final mass of the slurry after the test is different; the diffusion law of the slurry can be analyzed based on the outer contour of the slurry obtained by the three-dimensional laser scanner at different times.

[0067] The present invention designs an experimental device and method for the effect of dynamic water on the diffusion and solidification of synchronous dual slurries. Without considering groundwater, the diffusion law and filling fullness of the slurry on the wall of the pipe segment 2 can be intuitively reflected; when the influence of groundwater is considered, the dilution and solidification effects of the synchronous slurry under different water flow rates can be simulated, and the influence of factors such as water flow rate on the diffusion and solidification effects of the slurry can be analyzed at the same time, and the invisible diffusion of the slurry behind the wall can be visualized, which effectively improves the injection efficiency of the synchronous slurry; on the other hand, the concentration setting and slurry ratio of the synchronous dual slurry under different excavation speeds can be simulated, and the necessary preparations and operation points in the process of switching different slurry ratios can be explored, so as to realize the free switching of slurries of different concentrations and ratios under different excavation speeds, and ensure the effect of synchronous dual liquid grouting during on-site excavation.

[0068] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A test device for evaluating the effect of dynamic water on the flow and solidification of synchronous dual slurries, characterized by: The test box (1) comprises a hollow test box (1), wherein the test box (1) is a transparent cylindrical structure, wherein a cylindrical pipe segment (2) is axially arranged in the test box (1), and a first water inlet (21) and a second water inlet (22) are respectively provided at both ends of the test box (1), wherein the first water inlet (21) and the second water inlet (22) are arranged at a position above the top of the pipe segment (2), and the test device further comprises a grouting pipe (6) for grouting the outer wall of the pipe segment (2), wherein the grouting outlet of the grouting pipe (6) is arranged at the top of the outer surface of the pipe segment (2), and the grouting outlet of the grouting pipe (6) is arranged opposite to the first water inlet (21) or the second water inlet (22).

2. The test device for judging the effect of dynamic water on the flow and solidification of synchronous dual slurries according to claim 1, characterized in that: The grouting pipe (6) has a slurry inlet extending from the top of the test box (1), the grouting pipe (6) is slidably connected to the top of the test box (1), and the grouting pipe (6) can slide along the axial direction of the test box (1) to change the position of the slurry outlet of the grouting pipe (6).

3. The test device for judging the effect of dynamic water on the flow and solidification of synchronous dual slurries according to claim 2, characterized in that: The top of the test box (1) is provided with a slide groove (7) along the axial direction, and the grouting pipe (6) is provided with a pulley (8), and the pulley (8) is slidably arranged in the slide groove (7).

4. The test device for judging the effect of dynamic water on the flow and solidification of synchronous dual slurries according to claim 2, characterized in that: A fixing part (9) is provided at a position close to the grout outlet of the grouting pipe (6), and the fixing part (9) is slidably connected to the top of the pipe segment (2) along the axial direction.

5. The test device for judging the effect of dynamic water on the flow and solidification of synchronous dual slurries according to claim 1, characterized in that: The grouting pipe (6) is provided with a third valve (10) for opening and closing and a pressure gauge (11) for detecting the slurry pressure.

6. The test device for judging the effect of dynamic water on the flow and solidification of synchronous dual slurries according to any one of claims 1 to 5, characterized in that: The first water inlet (21) and the second water inlet (22) are respectively connected to a first water inlet pipe (14) and a second water inlet pipe (15); the first water inlet pipe (14) and the second water inlet pipe (15) are both provided with a flow meter (18) and a booster (16) for controlling the water flow rate; the first water inlet pipe (14) and the second water inlet pipe (15) are respectively provided with a first valve (19) and a second valve (20) for switching.

7. The test device for judging the effect of dynamic water on the flow and solidification of synchronous dual slurries according to claim 6, characterized in that: The first water inlet pipe (14) and the second water inlet pipe (15) are both provided with a pressure stabilizer (17) for stabilizing the flow rate of water.

8. The test method of the test device for judging the effect of dynamic water on the flow and solidification of synchronous dual slurries according to any one of claims 1 to 7, characterized in that: The following steps are involved: S100, adjusting the position of the grouting pipe (6) at the top of the pipe segment (2), and recording the distance between the grouting outlet of the grouting pipe (6) and the first water inlet (21) or the second water inlet (22); S200, through the grouting pipe (6) at a flow rate v m A slurry with a concentration ratio of A is injected, and at the same time, a slurry with a flow rate v is injected through the first water inlet (21) and / or the second water inlet (22). n Filling the test chamber (1) with water; S300, after time T, stop grouting and water injection, and analyze the slurry remaining on the pipe segment (2).

9. The test method according to claim 8, characterized in that: In the step S300, analyzing the slurry remaining on the pipe segment (2) includes: analyzing the volume, mass and contour of the slurry remaining on the pipe segment (2).

10. The test method according to claim 8 or 9, characterized in that: The step S200 further comprises: recording the slurry remaining on the pipe segment (2) at each time interval t0.

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