A strength testing device and method for a plastic state-semi-rigid state two-component slurry

Abstract

The present invention discloses a strength testing device and method for a plastic state - semi - rigid state two - liquid slurry, including an automatic penetration system, an intelligent evaluation system, a slurry injection system, and a curing system. The automatic penetration system mainly includes a penetration cone, a control panel, a lifting frame, a scale, and a penetration value display, which realizes the free vertical fall of the penetration cone and the measurement of the penetration value. The intelligent evaluation system includes a signal transmission module, a microprocessor, a discrimination module, and a data storage module, which can calculate the compressive strength of the slurry and discriminate the flow state, plastic state, semi - rigid state, and rigid state of the slurry. The curing system controls the curing environment of the slurry through a constant temperature water bath and temperature and humidity. The slurry injection system can realize the automatic mixing and injection of the slurry, reduce the difficulty and error of manually preparing two - liquid slurry specimens, and improve work efficiency. The present invention solves the compressive strength of the two - liquid slurry in the plastic state and the semi - rigid consolidation state through the penetration value of the free fall of the penetration cone.

Description

Technical Field

[0001] The present invention relates to the technical field of detection of double - liquid grouting materials for water - rich underground engineering and shield tunnels, and specifically to a device and method for testing the strength of plastic - semi - rigid double - liquid slurry. Background Art

[0002] As a quick - setting slurry, the double - liquid slurry has the advantages of rapid filling, good plugging effect, not being easily diluted by groundwater, and high early strength, and can fully meet the construction requirements of backfill grouting for large - diameter shield tunnels under water (cross - river, cross - sea). At present, the double - liquid slurry has become one of the most important grouting materials for backfill grouting projects of large - diameter shield tunnels.

[0003] Among the performance indicators of the double - liquid slurry, the compressive strength is one of the key parameters, which directly determines whether the backfill material can withstand the water pressure and the pressure of the surrounding soil. The compressive strength of the double - liquid slurry has significant differences in different consolidation states, especially in the plastic consolidation state, semi - rigid consolidation state, and rigid consolidation state. These differences determine the stability and durability of the backfill material. Therefore, studying the compressive strength of the double - liquid slurry in these different consolidation states is crucial for ensuring the construction quality of the shield tunnel grouting project. However, the existing compressive strength testing devices in China mainly measure the compressive strength of the double - liquid slurry in the rigid consolidation state. For the compressive strength of the double - liquid slurry in the plastic consolidation state and semi - rigid consolidation state, effective testing devices and methods have not been developed yet. This technical gap has led to the inability of existing research to evaluate the compressive strength of the double - liquid slurry in the early stage, and thus unable to provide comprehensive data support for actual projects.

[0004] Therefore, there is an urgent need to develop a new test device that can accurately measure the compressive strength of the double - liquid slurry in different consolidation states, especially in the plastic and semi - rigid consolidation states. This not only helps to study the variation characteristics of the early compressive strength of the double - liquid slurry, but also provides reliable data support for the further research and development of the double - liquid slurry material, promoting the continuous progress of the grouting engineering technology for underwater shield tunnels. Summary of the Invention

[0005] Based on the above - mentioned deficiencies of the existing technology, the present invention proposes a device for testing the strength of plastic - semi - rigid double - liquid slurry. This device can measure the compressive strength of the double - liquid backfill grouting material for shield tunnels in the plastic consolidation state and semi - rigid consolidation state, and can also distinguish the slurry flow state, plastic state, semi - rigid state, and rigid state.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A device for testing the strength of plastic - semi - rigid double - liquid slurry, comprising an automatic penetration system, an intelligent evaluation system, a slurry injection system, and a curing system;

[0008] The automatic penetration system includes a workbench, a lifting frame, a support frame, a scale, a penetration value display, a control panel, a display screen, a penetration cone, a height fine-tuning platform, a height fine-tuning knob, a spirit level, a support, and a lifting adjustment knob. The workbench is fixedly connected to the height fine-tuning platform. Above the height fine-tuning platform, there is a specimen dish. Above the specimen dish, there is a penetration cone. The penetration cone includes a penetration cone tip, a penetration cone shank, a penetration cone body, and a penetration cone cap. The penetration cone shank is movably inserted into a reserved hole in the lifting frame. Above the penetration cone, there are a scale and a penetration value display. The scale is slidably inserted into a sliding hole of the penetration value display. The penetration value display is fixedly connected to the lifting frame. The lifting frame is slidably sleeved on the support frame. The support frame is fixedly connected to the rear side of the workbench;

[0009] The intelligent evaluation system includes a signal transmission module, a microprocessor, a discrimination module, and a data storage module. The signal transmission module is used to transmit the output signal of the penetration value display to the microprocessor. The microprocessor substitutes the penetration value into a preset relational expression between the penetration value and the compressive strength to calculate the compressive strength. The discrimination module is connected to the microprocessor and is used to compare the calculated compressive strength value with a set threshold value to determine whether the slurry is in a fluid state, a plastic state, a semi-rigid state, or a rigid state. The result is output through the display screen and stored in the data storage module;

[0010] The slurry injection system includes an A-liquid injection pipe, a B-liquid injection pipe, a first pressure gauge, a second pressure gauge, an A-liquid storage tank, a B-liquid storage tank, a first check valve, a second check valve, a first valve, a second valve, a third valve, a Y-shaped pipe, and a mixed liquid injection pipe. Above the mixed liquid injection pipe, there is a connection to the first valve. Above the first valve, there is a connection to the Y-shaped pipe. On the left and right sides of the Y-shaped pipe, there are respectively a second valve and a third valve. Above the second valve, there is a first check valve. Above the first check valve, there is an A-liquid storage tank. Above the A-liquid storage tank, there is an A-liquid injection pipe. Above the third valve, there is a second check valve. Above the second check valve, there is a B-liquid storage tank. Above the B-liquid storage tank, there is a B-liquid injection pipe;

[0011] The curing system includes a constant temperature water bath control system and a temperature and humidity control system. The constant temperature water bath control system includes a constant temperature water bath tank, a second control panel, a water bath input pipe, and a water bath output pipe. The temperature and humidity control system includes a curing box, a temperature control button, a humidity control button, and a switch.

[0012] The above-mentioned strength testing device for plastic state - semi - rigid state double - liquid slurry is characterized in that the tip of the penetration cone is fixedly connected to the shank of the penetration cone, the body of the penetration cone is fixedly sleeved on the shank of the penetration cone, the shank of the penetration cone is adapted to the penetration cone cap and is connected by threads. The length of the tip of the penetration cone is 36 mm ± 0.02 mm, the angle of the tip of the penetration cone is 15° ± 20′, and the total mass of the penetration cone is 230 g.

[0013] The above - mentioned strength testing device for plastic state - semi - rigid state double - liquid slurry is characterized in that the relational expression between the penetration value and the compressive strength y =(1.479 + 0.045 * x )^(-1 / 0.169), where the penetration value x is in the unit of mm, and the compressive strength y is in the unit of N / mm 2 , and it can test the compressive strength of the plastic state - semi - rigid state of the double - liquid slurry. The strength range that can be tested is 0.001 - 0.1 N / mm 2 .

[0014] The above - mentioned strength testing device for plastic state - semi - rigid state double - liquid slurry is characterized in that for the flow state, plastic state, semi - rigid state or rigid state, when the strength is less than 0.001 N / mm 2 , the slurry is in the flow state. When the strength is 0.001 - 0.01 N / mm 2 , the slurry is in the plastic state. When the strength is 0.01 - 0.1 N / mm 2 , the slurry is in the semi - rigid state. When the strength is greater than 0.1 N / mm 2 , the slurry is in the rigid state.

[0015] The above - mentioned strength testing device for plastic state - semi - rigid state double - liquid slurry is characterized in that a spirit level for judging whether the working surface is in a horizontal state is arranged on the upper surface of the workbench, and the lifting and adjusting knob is used to adjust the height of the support to ensure that the working surface is in a horizontal position.

[0016] The above - mentioned strength testing device for plastic state - semi - rigid state double - liquid slurry is characterized in that an amplifier and a lighting lamp are arranged on the upper surface of the workbench to assist the penetration cone in contacting the surface of the specimen.

[0017] The above - mentioned strength testing device for plastic state - semi - rigid state double - liquid slurry is characterized in that the water bath input pipe and the water bath output pipe are respectively connected to the water bath inlet hole and the water bath outlet hole of the test dish to form a water bath circulation, and the mixed - liquid injection pipe is connected to the slurry injection hole on the right side of the test dish to form a slurry injection path, so that the slurry is injected into the specimen dish.

[0018] The above-mentioned strength testing device for plastic state - semi - rigid state double - liquid slurry is characterized in that the slurry injection system precisely adjusts its volume ratio by controlling the injection flow rates of liquid A and liquid B, realizing the automatic mixing and injection of the slurry.

[0019] A strength testing method for plastic state - semi - rigid state double - liquid slurry is characterized in that the above - mentioned strength testing device for plastic state - semi - rigid state double - liquid slurry is adopted, and it includes the following steps:

[0020] Step 1: Observe whether the liquid bubble in the spirit level is centered, and ensure that the workbench is in a horizontal position by adjusting the height of the support.

[0021] Step 2: Turn on the constant temperature water bath and heat the water temperature to the required temperature to form a water circulation through the water bath input pipe and the water bath output pipe; or adjust the temperature and humidity in the curing box by adjusting the temperature control button and the humidity control button.

[0022] Step 3: Control the injection flow rates of liquid A and liquid B, start the grouting equipment, open the second valve and the third valve respectively, and then open the first valve to inject the mixed slurry of liquid A and liquid B into the specimen dish.

[0023] Step 4: After the mixed slurry is injected completely, first close the third valve, then close the injection equipment for liquid A and liquid B, and remove the mixed liquid injection pipe. Then open the third valve to discharge the excess slurry, and inject clear water into the liquid A injection pipe and the liquid B injection pipe respectively to wash the entire pipeline.

[0024] Step 5: After the mixed slurry is cured for the required time, lower the lifting frame to a suitable height through the control panel.

[0025] Step 6: Slowly rotate the height fine - tuning knob clockwise to make the height fine - tuning platform rise slowly. Stop rotating the height fine - tuning knob when the lower end of the penetration cone contacts the surface of the mixed slurry in the specimen dish. In the case of poor light, use an amplifier and a lighting lamp in cooperation to ensure that the lower end of the penetration cone is in full contact with the surface of the mixed slurry.

[0026] Step 7: Vertically move the scale downwards to make the lower surface of the scale contact the upper surface of the penetration cone, and then zero the penetration value display.

[0027] Step 8: Make the penetration cone freely fall vertically through the control panel and penetrate into the mixed slurry, and vertically move the scale downwards to make the lower surface of the scale contact the upper surface of the penetration cone. Read the reading on the penetration value display, and this reading is the penetration value. Obtain the compressive strength according to the intelligent evaluation system and judge the consolidation state of the slurry. Repeat the test 3 times and take the average value as the final result.

[0028] Through the penetration cone penetration test, the relationship between the penetration value and the compressive strength was established. Based on the penetration value of the penetration cone, the compressive strength of the double-fluid grout was obtained, and the strength test range was 0.001 - 0.1 N / mm 2 。It is possible to judge the consolidation state of the whole process of the grout. When the strength is less than 0.001 N / mm 2 ,the grout is in a fluid state. When the strength is 0.001 - 0.01 N / mm 2 ,the grout is in a plastic state. When the strength is 0.01 - 0.1 N / mm 2 ,the grout is in a semi-rigid consolidation state.

[0029] Existing compressive strength testers are mainly used to measure the strength of double-fluid grout in the rigid body state, while the testing device and method provided by the present invention can measure the compressive strength of double-fluid grout in the plastic to semi-rigid state, making up for the deficiencies of existing testing equipment.

[0030] The automatic penetration system, intelligent evaluation system, grout injection system, and curing system constitute an integrated device for testing the compressive strength of double-fluid grout. The grout injection system is used to pour specimens, and the volume ratio is precisely adjusted by controlling the injection flow rates of liquid A and liquid B, reducing the difficulties and errors in manually preparing double-fluid grout specimens, thereby effectively improving work efficiency. The automatic penetration system can achieve the free vertical fall of the penetration cone and the measurement of the penetration value, and the operation steps are simple. The intelligent evaluation system can distinguish the fluid state, plastic state, semi-rigid state, and rigid state of the grout. The curing system can achieve the curing of the grout under different water temperature environments, as well as under different humidity and temperature conditions, so as to measure the compressive strength under different conditions. Description of the Drawings

[0031] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 is a schematic diagram of the structure of the automatic penetration system;

[0033] Figure 3 is a schematic diagram of the structure of the grout injection system;

[0034] Figure 4 is a schematic diagram of the structure of the penetration cone;

[0035] Figure 5 is a flowchart of the main test procedure of the present invention;

[0036] Figure 6 is a curve graph showing the relationship between the penetration value obtained from the penetration cone penetration test and the compressive strength;

[0037] Figure 7 is the development process of the consolidation state of the double-fluid grout.

[0038] Reference numerals: 101, test system; 1011, workbench; 1012, height fine-tuning platform; 1013, specimen dish; 1014, penetration cone; 10141, penetration cone tip; 10142, penetration cone shank; 10143, penetration cone body; 10144, penetration cone cap; 1015, penetration value display; 1016, scale; 1017, lifting frame; 1018, support frame; 1019, display screen; 10110, control panel; 10111, amplifier; 10112, lighting lamp; 10113, height fine-tuning knob; 10114, lifting adjustment knob; 10115, support; 10116, water bath inlet hole; 10117, water bath outlet hole; 10118, grouting hole; 10119, spirit level; 201, slurry injection system; 2011, mixed liquid injection pipe; 2012, first valve; 2013, Y-shaped pipe; 2014, second valve; 2015, third valve; 2016, first check valve; 2017, second check valve; 2018, A liquid storage tank; 2019, B liquid storage tank; 20110, A liquid injection pipe; 20111, B liquid injection pipe; 301, warm water bath control system; 3011, constant temperature water bath; 3012, second control panel; 3013, water bath input pipe; 3014, water bath output pipe; 302, temperature and humidity control system; 3021, curing box; 3022, switch; 3023, temperature control button; 3024, humidity control button. Detailed implementation manners

[0039] Next, the solutions in the embodiments of the present application will be clearly and detailedly described in conjunction with the drawings in the embodiments of the present application. It should be clear that the embodiments provided by the present invention only represent a part of the examples of the present invention, and do not represent all examples. For the embodiments of the present application, other embodiments obtained by those of ordinary skill in the art without creative efforts all fall within the protection scope of the present application.

[0040] As Figures 1-4 shown, a plastic state - semi-rigid state two-component slurry strength testing device includes an automatic penetration system 101, an intelligent evaluation system, a slurry injection system 201, and a curing system;

[0041] As Figures 1-2As shown in the figure, the test system includes an automatic penetration system and an intelligent evaluation system. The automatic penetration system includes a workbench 1011, a lifting frame 1017, a support frame 1018, a scale 1016, a penetration value display 1015, a control panel 10110, a display screen 1019, a penetration cone 1014, a height fine-tuning platform 1012, a height fine-tuning knob 10113, a spirit level 10119, a support 10115, and a lifting adjustment knob 10114. The workbench 1011 is fixedly connected to the height fine-tuning platform 1012. A specimen dish is arranged above the height fine-tuning platform 1012. A penetration cone 1014 is arranged above the specimen dish 1013. The penetration cone 1014 includes a penetration cone tip 10141, a penetration cone shank 10142, a penetration cone body 10143, and a penetration cone cap 10144. The penetration cone shank 10142 is movably inserted into a reserved hole in the lifting frame. A scale 1016 and a penetration value display 1015 are arranged above the penetration cone 1014. The scale 1016 is slidably inserted into a sliding hole of the penetration value display 1015. The penetration value display 1015 is fixedly connected to the lifting frame 1017. The lifting frame 1017 is slidably sleeved on the support frame 1018. The support frame 1018 is fixedly connected to the rear side of the workbench 1011;

[0042] The intelligent evaluation system includes a signal transmission module, a microprocessor, a discrimination module, and a data storage module. The signal transmission module is used to transmit the output signal of the penetration value display to the microprocessor. The microprocessor substitutes the penetration value into a preset relationship formula between the penetration value and the compressive strength to calculate the compressive strength. The discrimination module is connected to the microprocessor and is used to compare the calculated compressive strength value with a set threshold value to determine whether the slurry is in a fluid state, a plastic state, a semi-rigid state, or a rigid state. The result is output through the display screen and stored in the data storage module;

[0043] As Figure 1 and 3As shown, the slurry injection system 201 includes an A liquid injection pipe 20110, a B liquid injection pipe 20111, an A liquid storage tank 2018, a B liquid storage tank 2019, a first check valve 2016, a second check valve 2017, a first valve 2012, a second valve 2014, a third valve 2015, a Y-shaped pipe 2013, and a mixed liquid injection pipe 2011. The upper part of the mixed liquid injection pipe 2011 is connected to the first valve 2012. The upper part of the first valve 2012 is connected to the Y-shaped pipe 2013. The second valve 2014 and the third valve 2015 are respectively arranged on the left and right sides of the Y-shaped pipe 2013. The first check valve 2016 is arranged above the second valve 2014. The A liquid storage tank 2018 is arranged above the first check valve 2016. The A liquid injection pipe 20110 is arranged above the A liquid storage tank 2018. The second check valve 2017 is arranged above the third valve 2015. The B liquid storage tank 2019 is arranged above the second check valve 2017. The B liquid injection pipe 20111 is arranged above the B liquid storage tank 2019;

[0044] As Figure 1 shown, the curing system includes a constant temperature water bath control system 301 and a temperature and humidity control system 302. The constant temperature water bath control system 301 includes a constant temperature water bath tank 3011, a second control panel 3012, a water bath input pipe 3013, and a water bath output pipe 3014. The temperature and humidity control system 302 includes a curing box 3021, a switch 3022, a temperature control button 3023, and a humidity control button 3024.

[0045] As Figure 4 described, the tip 10141 of the penetration cone is fixedly connected to the shank 10142 of the penetration cone. The body 10143 of the penetration cone is fixedly connected to the shank 10142 of the penetration cone. The shank 10142 of the penetration cone is adapted to the cap 10144 of the penetration cone and is connected by threads. The length of the tip 10141 of the penetration cone is 36 mm ± 0.02 mm. The angle of the tip 10141 of the penetration cone is 15° ± 20'. The total mass of the penetration cone 1014 is 230 g.

[0046] As Figures 6-7 shown, the relational formula between the penetration value and the compressive strength y =(1.479 + 0.045 * x ) ^ (-1 / 0.169), where the penetration value x is in mm, and the compressive strength y is in N / mm 2 , and the plastic state - semi-rigid state compressive strength of the double-component slurry can be tested. The testable strength range is 0.001 - 0.1 N / mm 2 .

[0047] The flow state, plastic state, semi-rigid state or rigid state. When the strength is less than 0.001 N / mm 2 , the slurry is in the flow state. When the strength is 0.001 - 0.01 N / mm 2 , the slurry is in the plastic state. When the strength is 0.01 - 0.1 N / mm 2 , the slurry is in the semi-rigid consolidation state. When the strength is greater than 0.1 N / mm 2 , the slurry is in the rigid state.

[0048] As Figure 2 shown, a spirit level 10119 for judging whether the working surface is in a horizontal state is arranged on the upper surface of the workbench, and the lifting adjustment knob 10114 is used to adjust the height of the support 10115 to ensure that the working surface is in a horizontal position.

[0049] As Figure 2 shown, an amplifier 10111 and a lighting lamp 10112 are arranged on the upper surface of the workbench to assist the penetration cone to contact the surface of the specimen.

[0050] As Figure 1 shown, the water bath input pipe 3013 and the water bath output pipe 3014 are respectively connected to the water bath inlet hole 10116 and the water bath outlet hole 10117 of the test dish 1013 to form a water bath circulation, and the mixed liquid injection pipe 2011 is connected to the grouting hole 10118 on the right side of the test dish 1013 to form a grouting path, so that the slurry is injected into the specimen dish 1013.

[0051] The slurry injection system precisely adjusts its volume ratio by controlling the injection flow rates of liquid A and liquid B, and realizes the automatic mixing and injection of the slurry.

[0052] The method for testing the strength of a plastic state - semi-rigid state double-liquid slurry includes the following steps:

[0053] Step 1: Observe whether the liquid bubble in the spirit level 10119 is centered, and ensure that the workbench 1011 is in a horizontal position by adjusting the height of the support 10115;

[0054] Step 2: Turn on the constant temperature water bath 3011, heat the water temperature to the required temperature, and form a water circulation through the water bath input pipe 3013 and the water bath output pipe 3014; or adjust the temperature and humidity in the curing box 3021 by adjusting the temperature control button 3023 and the humidity control button 3024;

[0055] Step 3: Control the injection flow rates of liquid A and liquid B, start the grouting equipment, open the second valve 2014 and the third valve 2015 respectively, and then open the first valve 2012 to inject the mixed slurry of liquid A and liquid B into the specimen dish 1013;

[0056] Step 4: After the injection of the mixed slurry is completed, first close the first valve 2012, then turn off the injection devices for liquid A and liquid B, and remove the mixed liquid injection pipe 2011. Subsequently, open the first valve 2012 to discharge the excess slurry, and inject clear water into the liquid A injection pipe 20110 and the liquid B injection pipe 20111 respectively to rinse the entire pipeline;

[0057] Step 5: After the mixed slurry has solidified for the required time, use the control panel 10110 to lower the lifting frame 1017 to an appropriate height;

[0058] Step 6: Slowly rotate the height fine-tuning knob 10113 clockwise to slowly raise the height fine-tuning platform 1012. Stop rotating the height fine-tuning knob 10113 when the lower end of the penetration cone 1014 contacts the surface of the mixed slurry in the specimen dish 1013. In the case of poor light, use the amplifier 10111 and the illumination lamp 10112 in combination to ensure that the lower end of the penetration cone 1014 is in full contact with the surface of the mixed slurry;

[0059] Step 7: Vertically move the scale 1016 downward so that the lower surface of the scale 1016 contacts the upper surface of the penetration cone 1014, and then zero the penetration value display 1015;

[0060] Step 8: Use the control panel 10110 to make the penetration cone 1014 freely fall vertically and penetrate into the mixed slurry, and vertically move the scale 1016 downward so that the lower surface of the scale 1016 contacts the upper surface of the penetration cone 1014. Read the reading of the penetration value display 1015, and this reading is the penetration value. Obtain the compressive strength according to the intelligent evaluation system and determine the consolidation state of the slurry. Repeat the test 3 times and take the average value as the final result.

Claims

1. A strength testing device for plastic state - semi - rigid state two - liquid slurry, comprising an automatic penetration system, an intelligent evaluation system, a slurry injection system, and a curing system; The automatic penetration system includes a workbench, a lifting frame, a support frame, a scale, a penetration value display, a control panel, a display screen, a penetration cone, a height fine - tuning platform, a height fine - tuning knob, a spirit level, a support, and a lifting adjustment knob. The workbench is fixedly connected to the height fine - tuning platform. Above the height fine - tuning platform is provided a specimen dish. Above the specimen dish is provided a penetration cone. The penetration cone includes a penetration cone tip, a penetration cone shank, a penetration cone body, and a penetration cone cap. The penetration cone shank is movably inserted into a reserved hole of the lifting frame. Above the penetration cone are provided a scale and a penetration value display. The scale is slidably inserted into a slide hole of the penetration value display. The penetration value display is fixedly connected to the lifting frame. The lifting frame is slidably sleeved on the support frame. The support frame is fixedly connected to the rear side of the workbench; The intelligent evaluation system includes a signal transmission module, a microprocessor, a discrimination module, and a data storage module. The signal transmission module is used to transmit the output signal of the penetration value display to the microprocessor. The microprocessor substitutes the penetration value into a preset relational expression between the penetration value and the compressive strength to calculate the compressive strength. The discrimination module is connected to the microprocessor and is used to compare the calculated compressive strength value with a set threshold value to determine whether the slurry is in a fluid state, a plastic state, a semi - rigid state, or a rigid state. The result is output through the display screen and stored in the data storage module; The slurry injection system includes an A - liquid injection pipe, a B - liquid injection pipe, a first pressure gauge, a second pressure gauge, an A - liquid storage tank, a B - liquid storage tank, a first check valve, a second check valve, a first valve, a second valve, a third valve, a Y - shaped pipe, and a mixed - liquid injection pipe. Above the mixed - liquid injection pipe is connected a first valve. Above the first valve is connected a Y - shaped pipe. On the left and right sides of the Y - shaped pipe are respectively provided a second valve and a third valve. Above the second valve is provided a first check valve. Above the first check valve is provided an A - liquid storage tank. Above the A - liquid storage tank is provided an A - liquid injection pipe. Above the third valve is provided a second check valve. Above the second check valve is provided a B - liquid storage tank. Above the B - liquid storage tank is provided a B - liquid injection pipe; The curing system includes a constant - temperature water - bath control system and a temperature - humidity control system. The constant - temperature water - bath control system includes a constant - temperature water - bath tank, a second control panel, a water - bath input pipe, and a water - bath output pipe. The temperature - humidity control system includes a curing box, a temperature control button, a humidity control button, and a switch. The water - bath input pipe and the water - bath output pipe are respectively connected to the water - bath inlet hole and the water - bath outlet hole of the test dish to form a water - bath circulation. The mixed - liquid injection pipe is connected to the grouting hole on the right side of the test dish to form a grouting path, so that the slurry is injected into the specimen dish.

2. The strength testing device for a plastic state-semi-rigid state two-component slurry according to claim 1, characterized in that, The length of the penetration cone tip is 36 ± 0.02 mm, the angle of the penetration cone tip is 15° ± 20′, and the total mass of the penetration cone is 230 g.

3. The strength testing device for the plastic state-semi-rigid state two-component slurry according to claim 1, wherein, The relationship between the penetration value and the compressive strength is y = (1.479 + 0.045 * x)^(-1 / 0.169), where the unit of the penetration value x is mm, and the unit of the compressive strength y is N / mm2. The compressive strength in the plastic state - semi-rigid state of the double-fluid slurry can be tested, and the testable strength range is 0.001 - 0.1 N / mm 2 .

4. The strength testing device for the plastic state-semi-rigid state two-component slurry according to claim 1, characterized in that, The flow state, plastic state, semi-rigid state or rigid state, when the strength is less than 0.001 N / mm 2 , the slurry is in the flow state. When the strength is 0.001 - 0.01 N / mm 2 , the slurry is in the plastic state. When the strength is 0.01 - 0.1 N / mm 2 , the slurry is in the semi-rigid state. When the strength is greater than 0.1 N / mm 2 , the slurry is in the rigid state.

5. The strength testing device for the plastic state-semi-rigid state two-component slurry according to claim 1, wherein, A spirit level for judging whether the working surface is horizontal is provided on the upper surface of the workbench, and the lifting adjustment knob is used to adjust the height of the support to ensure that the working surface is in a horizontal position.

6. The strength testing device for a plastic state-semi-rigid state two-component slurry according to claim 1, characterized in that An amplifier and a lighting lamp are provided on the upper surface of the workbench to assist the penetration cone in contacting the surface of the specimen.

7. The strength testing device for a plastic state - semi - rigid state two - liquid slurry according to claim 1, wherein, The slurry injection system precisely adjusts its volume ratio by controlling the injection flow rates of liquid A and liquid B to achieve automatic mixing and injection of the slurry.

8. A method for testing the strength of a plastic state-semi-rigid state dual-liquid slurry, characterized in that, When using a plastic state-semi-rigid state dual-liquid slurry strength testing device according to any one of claims 1-7, the following steps are included: Step 1: Observe whether the liquid bubble in the spirit level is centered, and ensure that the workbench is in a horizontal position by adjusting the height of the support; Step 2: Turn on the constant temperature water bath and heat the water temperature to the required temperature to form a water cycle through the water bath input pipe and the water bath output pipe; or adjust the temperature and humidity in the curing box by adjusting the temperature control button and the humidity control button; Step 3: Control the injection flow rates of liquid A and liquid B, start the grouting equipment, open the second valve and the third valve respectively, and then open the first valve to inject the mixed slurry of liquid A and liquid B into the specimen dish; Step 4: After the mixed slurry is injected, first close the first valve, then close the injection equipment for liquid A and liquid B, and remove the mixed liquid injection pipe. Then open the first valve to discharge the excess slurry, and inject clear water into the liquid A injection pipe and the liquid B injection pipe respectively to flush the entire pipeline; Step 5: After the mixed slurry is cured for the required time, lower the lifting frame to a suitable height through the control panel; Step 6: Slowly rotate the height fine-tuning knob clockwise to slowly raise the height fine-tuning platform. When the lower end of the penetration cone contacts the surface of the mixed slurry in the specimen dish, stop rotating the height fine-tuning knob. In case of poor light, use the amplifier and the lighting lamp in combination to ensure full contact between the lower end of the penetration cone and the surface of the mixed slurry; Step 7: Vertically move the scale downwards to make the lower surface of the scale contact the upper surface of the penetration cone, and zero the penetration value display; Step 8: Make the penetration cone freely fall vertically through the control panel and penetrate into the mixed slurry, and vertically move the scale downwards to make the lower surface of the scale contact the upper surface of the penetration cone, and read the reading of the penetration value display. This reading is the penetration value; obtain the compressive strength according to the intelligent evaluation system and judge the consolidation state of the slurry; repeat the test 3 times and take the average value as the final result.

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