Simulation test system and simulation test method

Abstract

The invention relates to a simulation test system and a simulation test method, and relates to the technical field of underground water exploitation. The simulation test system comprises a test box, a water supplementing pipe is installed in the test box and connected with a water supplementing assembly, the test box is used for being filled to form a simulation stratum, a detection assembly is arranged in the test box to detect the soil layer change of the simulation stratum, and at least three seepage well models are further arranged in the test box and connected with the water supplementing assembly. The seepage well model is communicated with the water pumping assembly, the pumped seepage well model can be adjusted through the water pumping assembly, simulation of various underground water mining environments is achieved, and soil layer changes in various water pumping environments can be measured through the detection assembly in the water pumping process. That is to say, a more complex underground water mining environment can be simulated, so that more accurate simulation data can be acquired.

Description

Technical Field

[0001] The invention relates to the technical field of groundwater exploitation, and in particular to a simulation test system and a simulation test method. Background Art

[0002] With the regional development of my country's transportation infrastructure, the ground subsidence caused by groundwater exploitation has gradually become an environmental geological disaster that seriously threatens the safety of transportation operations. Especially near the operating railways, due to the excessive and concentrated exploitation of pumping wells, a large number of ground subsidence funnels have appeared, and the surface has produced uneven subsidence, which has caused deformation effects on railway structures such as roadbeds and bridges, seriously hindering railway operations and endangering operational safety.

[0003] In the related technology, it is impossible to accurately assess the impact of pumping wells on formation subsidence, resulting in large deviations in prediction results when predicting subsidence disasters, making it difficult to propose targeted groundwater exploitation prevention and control measures and plans. Summary of the invention

[0004] The invention provides a simulation test system and a simulation test method, which are used for better simulating groundwater exploitation and improving the accuracy of settlement prediction.

[0005] In a first aspect, the present invention provides a simulation test system, comprising: a test box, the test box is used to fill a simulated stratum; a water supply pipe installed in the test box, and the water supply pipe is connected to a first joint; a roadbed model, the roadbed model is used to be installed on the top of the simulated stratum; a detection component, the detection component includes a settlement mark, a strain sensor, a pore water pressure sensor, an earth pressure sensor and an analysis device, the detection component is installed in the test box to detect stratum changes in the test box; at least three seepage well models arranged along a first straight line, the seepage well models are installed in the test box, and the seepage well models are spaced from each other, and the side walls of the seepage well models are provided with a plurality of seepage holes; a water supply component, which has a water supply pipe, and the water supply pipe is connected to the first joint; and a pumping component, the pumping component is used to extract water from the seepage well model.

[0006] In one embodiment, the roadbed model includes a main body and a cylinder, wherein the cylinder is connected to the bottom of the main body and inserted into the simulated stratum.

[0007] In one embodiment, at least two roadbed models are installed on the top of the simulated stratum, and the cylinders of some roadbed models are filled with cement, while the cylinders of other roadbed models are not filled with cement.

[0008] In one embodiment, the pumping assembly also includes a peristaltic pump, a pumping pipe and a first water tank, one end of the peristaltic pump is connected to the pumping pipe, the pumping pipe is used to be inserted into the infiltration well model, the other end of the peristaltic pump is connected to the first water tank, and the pumping direction of the peristaltic pump is switchable.

[0009] In one embodiment, the water supply pipe is in contact with the inner wall of the test box, the water supply pipe is provided with a plurality of water supply holes, and the outer side of the water supply pipe is wrapped with filter gauze.

[0010] In one embodiment, the water supply pipe includes a horizontal section and an extension section, the horizontal section extends horizontally, the horizontal section is located below the extension section and is connected to the first joint, and the bottom of the extension section is connected to the horizontal section, and the extension section extends in a serpentine shape from bottom to top.

[0011] In one embodiment, the water replenishment assembly includes a support frame, a suspension rope, a traction drive member and a second water tank. A pulley is installed on the support frame, and the pulley cooperates with the suspension rope. One end of the suspension rope is connected to the traction drive member. The second water tank is suspended at one end of the suspension rope away from the traction drive member, and the second water tank is connected to the test box through a first water pipe.

[0012] In one embodiment, the test box includes a transparent observation panel, through which the simulated formation in the test box can be observed.

[0013] In one embodiment, the seepage well model is semi-cylindrical, and the seepage well model is attached to the transparent observation plate to enclose a third chamber.

[0014] In one embodiment, the detection component further includes a displacement sensor disposed at the bottom of the roadbed model.

[0015] In a second aspect, the present invention further provides a simulation test method, which uses the above-mentioned simulation test system to perform a test, and comprises the following steps:

[0016] Filling the test box to form a simulated stratum;

[0017] The water supply component passes water to the water supply pipe, and uses the water supply pipe to pass the water to the simulated formation in the test box;

[0018] Perform various types of settlement simulations alternately, use the detection component to record the soil layer data of the simulated strata during the settlement simulation, and shut down the pumping component for a first period of time after each settlement simulation;

[0019] The types of settlement simulation include single-well simulation, first double-well simulation, second double-well simulation and multi-well simulation, wherein the single-well simulation includes a pumping component pumping water from one of the seepage well models, the first double-well simulation includes a pumping component pumping water from two adjacent seepage well models, the second double-well simulation includes a pumping component pumping water from two seepage well models at both ends, and the multi-well simulation includes a pumping component pumping water from all the seepage well models.

[0020] In one embodiment, the pumping assembly further includes a peristaltic pump, a pumping water pipe and a first water tank, one end of the peristaltic pump is connected to the pumping water pipe, the pumping water pipe is used to be inserted into the seepage well model, and the other end of the peristaltic pump is connected to the first water tank;

[0021] The single well simulation further comprises: after the pumping assembly pumps water from one of the infiltration well models, switching the pumping direction of the peristaltic pump to inject the water in the first water tank into the infiltration well model after the pumping;

[0022] The first double-well simulation further comprises: after the pumping assembly pumps water from two adjacent seepage well models, switching the pumping direction of the peristaltic pump to inject water from the first water tank into the seepage well model after the pumping;

[0023] The second double-well simulation further comprises: after the pumping assembly pumps water from the two seepage well models at both ends, switching the pumping direction of the peristaltic pump to inject the water in the first water tank into the seepage well model after the pumping;

[0024] The multi-well simulation further comprises: after the pumping assembly pumps water from all the infiltration well models, switching the pumping direction of the peristaltic pump to inject the water in the first water tank into the infiltration well models after the pumping.

[0025] Compared with the prior art, the advantages of the present invention are that it can simulate groundwater extraction by pumping water from the seepage well model through the pumping component, and can achieve the simulation of single-point groundwater extraction and double-point groundwater extraction by adjusting the object of the pumping component. Moreover, it can simulate the groundwater collection work of two places with a close interval by extracting two adjacent seepage well models through the pumping component, and it can simulate the groundwater collection work of two places with a long interval by extracting two far-away seepage well models through the pumping component, so as to analyze the influence of the water extraction spacing on the settlement. In other words, the present application can simulate a more complex groundwater extraction environment, so as to collect more accurate simulation data, and the prediction model obtained based on the simulation data analysis has higher accuracy in predicting settlement of complex water extraction conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0027] Figure 1is a structural schematic diagram of a simulation test system in an embodiment of the present invention;

[0028] Figure 2 is a schematic structural diagram of a first baffle in an embodiment of the present invention;

[0029] Figure 3 is another structural schematic diagram of the first baffle in an embodiment of the present invention;

[0030] Figure 4 is a schematic diagram of the three-dimensional structure of the test box during the test in the embodiment of the present invention;

[0031] Figure 5 is a schematic diagram of the three-dimensional structure of a roadbed model in an embodiment of the present invention;

[0032] Figure 6 1 is a schematic diagram of a top view of a water seepage well model in an embodiment of the present invention;

[0033] Figure 7 It is a schematic flow chart of the simulation test method in an embodiment of the present invention.

[0034] Reference numerals:

[0035] 1. Test box; 2. Roadbed model; 3. Transparent observation board; 4. Seepage well model; 5. Peristaltic pump; 6. First water tank; 7. Support frame; 8. Second water tank; 9. Water pump; 10. Clean water tank; 11. Pumping pipe; 12. Intermediate water pipe; 13. Water supply pipe; 14. Clean water inlet pipe; 15. Clean water return pipe; 16. Detection component; 17. Analysis device; 18. First industrial camera; 19. Second industrial camera; 20. Strengthening rib; 21. First partition; 22. Water supply pipe; 23. Horizontal section; 24. Extension section; 25. Water supply hole; 26. First joint; 27. Three-way joint; 28. Stainless steel mesh; 29. ​​Seepage hole. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings.

[0037] See also Figure 1 As shown, a simulation test system provided by the present application includes: a test box 1, a roadbed model 2, a detection component 16, a seepage well model 4, a water replenishment component and a water pumping component.

[0038] See also Figure 2-Figure 4 As shown, a water supply pipe is provided in the test box 1, and the water supply pipe is connected to the first joint. A transparent observation plate 3 is also provided on the front side of the test box 1, which can facilitate the test personnel to observe the cross section of the soil layer in the test box 1.

[0039] During the test, the test box 1 is filled with simulated strata, and the settlement mark, strain sensor, pore water pressure sensor, and soil pressure sensor of the detection component 16 are buried in the simulated strata, and the soil layer changes of the simulated strata are measured by using the settlement mark, strain sensor, pore water pressure sensor, and soil pressure sensor of the detection component 16. The settlement mark, strain sensor, pore water pressure sensor, and soil pressure sensor arranged in the test box 1 are connected by the analysis device 17 arranged outside the test box 1, so that the collected data is transmitted to the analysis device 17 for analysis, avoiding the simulated strata to be opened after each test to read the data of each measuring sensor, which is conducive to the reuse of the simulation test system. In some implementations, the analysis device 17 includes a computer, and the analysis device 17 can be used to establish a settlement prediction model based on the collected data. Since the simulation test system of the present application can collect complex groundwater exploitation conditions, the settlement prediction model analyzed by the analysis device 17 can more accurately predict groundwater settlement in complex environments.

[0040] In some implementations, the settlement standard is equipped with a micrometer. The pore water pressure sensor is used to monitor the pore pressure changes in the unsaturated soil range and the saturated soil during the test.

[0041] The detection component 16 includes multiple strain sensors, some of which are arranged in the simulated stratum, and other strain sensors are arranged at the bottom of the roadbed model 2. The strain sensors arranged at the bottom of the roadbed model 2 can measure the stress changes of the roadbed model 2 during the pumping process.

[0042] The water replenishment pipe 22 is connected to the water supply pipe 13 of the water replenishment assembly through the first joint 26. The second water tank 8 of the water replenishment assembly can be used to replenish water to the test box 1, thereby realizing water replenishment to the simulated formation.

[0043] The simulation test system has at least three seepage well models 4 arranged along the first straight line, and the seepage well models 4 are installed in the test box 1, and the water wells in the groundwater environment can be simulated by the seepage well models 4. Seepage holes 29 are provided on the seepage well models 4, and after the simulated formation is replenished with water by the water replenishment component, the water in the simulated formation can flow into the seepage well model 4 through the seepage holes 29, and the water in the seepage well model 4 can be pumped out by the pumping component to simulate the working conditions during groundwater exploitation.

[0044] The top of the seepage well model 4 extends out of the simulated stratum, and the bottom of the seepage well model 4 fits with the bottom surface of the test box 1 to reduce the sand in the simulated stratum from entering the seepage well model 4 .

[0045] See also Figure 4 as well as Figure 5As shown, since at least three seepage well models 4 are arranged in the test box 1, it is possible not only to simulate the single-point groundwater exploitation condition by extracting water from a single seepage well model 4, but also to simulate the double-point groundwater exploitation condition by extracting water from two seepage well models 4, and to detect the settlement data of the simulated stratum during groundwater exploitation at multiple locations with the aid of the detection component 16, wherein it is also possible to simulate the influence of the exploitation interval on groundwater exploitation during groundwater exploitation at multiple locations by selecting the extracted seepage well model 4 (such as extracting two adjacent seepage well models 4, or extracting two relatively far seepage well models 4).

[0046] The simulation test system also includes a roadbed model 2, which is installed on the top of the simulated stratum to simulate the railroad bed. It can be understood that the ratio B between the outer dimensions of the roadbed model 2 and the outer dimensions of the actual railroad bed is equal to the ratio A between the outer dimensions of the seepage well model 4 and the outer dimensions of the actual seepage well, and the spacing between the roadbed model 2 and the seepage well model 4 is also designed according to the ratio A.

[0047] That is, A=outer dimensions of roadbed model 2 / outer dimensions of actual railroad roadbed=outer dimensions of seepage well model 4 / outer dimensions of actual seepage well=distance between roadbed model 2 and seepage well model 4 / distance between actual railroad roadbed and actual seepage well.

[0048] That is to say, the actual railroad bed can be simulated by the roadbed model 2, so that the simulation test system is closer to the actual working conditions, so that more accurate test data can be obtained, and more accurate prediction data can be provided for the laying of railroad bed and the prevention and control of groundwater in nearby strata.

[0049] It should be noted that in order to improve the accuracy of the simulation test, it is necessary to lay the simulated stratum according to the actual soil environment.

[0050] In some implementations, the simulated stratum includes a multi-layer soil structure arranged from bottom to top: a silty clay aquiclude, a medium-coarse sand aquiclude, a clay aquiclude, a silty fine sand aquiclude, and a silty clay aquiclude. In order to compact the simulated stratum, a compacting device may be used to hammer the stratum after each layer of the soil structure is evenly spread, so that each layer of the structure is compacted to a designed thickness.

[0051] In order to better measure the settlement changes of simulated strata, settlement markers, strain sensors, pore water pressure sensors, and soil pressure sensors are installed in each layer of soil structure to measure each layer of soil structure.

[0052] In some implementations, vaseline may be applied to the inner side of the test box 1 to eliminate the boundary effect at the model boundary as much as possible and better simulate the actual formation environment.

[0053] See also Figure 4 as well as Figure 5 As shown, in some implementations, the roadbed model 2 includes a main body and a cylinder, the cylinder is connected to the bottom of the main body, and the cylinder is inserted into the simulated stratum. The cylinder inserted into the simulated stratum can improve the connection force between the roadbed model 2 and the simulated stratum, thereby simulating the pile structure of the roadbed and better simulating the stratum.

[0054] In some implementations, at least two roadbed models 2 are installed on the top of the simulated stratum, and the cylinders of some roadbed models 2 are filled with cement, while the cylinders of other roadbed models 2 are not filled with cement. The cylinder filled with cement is closer to the actual cement-cast pile body, while the cylinder not filled with cement is closer to the precast pile. By setting up the two cylinders, the effects of cement-cast piles and precast piles on settlement can be compared in the simulation test. In some implementations, the pile body of the actual railway roadbed can be adjusted according to the test results. For example, if the settlement of the roadbed model 2 area with cement cast in the cylinder is small in the test, the cement-cast pile body can be used in the actual construction.

[0055] In some implementations, the cylinder that is not poured with cement is made of wood, and the cylinder that needs to be poured with cement is made of a hollow perforated hard pipe. In other implementations, the cylinder can also be made of other cylindrical structures.

[0056] See also Figure 1 As shown, in some implementations, the pumping assembly further includes a peristaltic pump 5, a pumping water pipe 11, and a first water tank 6. One end of the peristaltic pump 5 is connected to the pumping water pipe 11, and the pumping water pipe 11 is used to be inserted into the seepage well model 4. The other end of the peristaltic pump 5 is connected to the first water tank 6, and the pumping direction of the peristaltic pump 5 is switchable. In other words, the peristaltic pump 5 can not only be used to pump water from the seepage well model 4 to the first water tank 6 through the pumping water pipe 11 to simulate the pumping condition, but also the peristaltic pump 5 can be used to pump water from the first water tank 6 to the seepage well model 4 to simulate the recharging condition, which can reflect the deformation response of the roadbed after the settlement control measures are taken.

[0057] The peristaltic pump 5 can achieve constant flow rate and constant flow rate pumping, thereby better controlling the pumping progress of each infiltration well model 4 .

[0058] In some implementations, the pumping water pipe 11 is provided with a plurality of branch rubber tubes, each of which corresponds to a seepage well model 4. By inserting the branch rubber tube into the corresponding seepage well model 4, the pumping work of the seepage well model 4 can be realized.

[0059] In some implementations, the first water tank 6 of the pumping assembly is connected to the second water tank 8 of the water replenishing assembly, and a filter is provided between the first water tank 6 and the second water tank 8 to prevent the extracted mud from flowing into the second water tank 8 and contaminating the second water tank 8. That is to say, in the present application, by connecting the first water tank 6 with the second water tank 8, the reuse of the extracted water is achieved, the water consumption of the simulation test system is reduced, and it is more energy-saving and environmentally friendly.

[0060] The second water tank 8 is connected to the clean water tank 10 through the clean water inlet pipe 14, and the clean water tank 10 is connected to the first water tank 6 through the intermediate water pipe 12 with a filter device, that is, the water drawn from the first water tank 6 flows into the clean water tank 10 through the intermediate water pipe 12, and the clean water tank 10 is connected to the second water tank 8 through the clean water inlet pipe 14. A water pump 9 is arranged on the clean water inlet pipe 14, and the clean water in the clean water tank 10 is pumped into the second water tank 8 through the water pump 9. A clean water return pipe 15 is arranged on the side wall of the second water tank 8, and the other end of the clean water return pipe 15 is connected to the clean water tank 10. When the liquid level in the second water tank 8 is higher than the clean water return pipe 15, the water above can be discharged into the clean water tank 10 through the clean water return pipe 15, that is, the water level in the second water tank 8 can be maintained at the first water level by using the clean water return pipe 15. The bottom of the second water tank 8 is connected to the water supply pipe 22 through the water supply pipe 13 .

[0061] See also Figures 1 to 3 As shown, in some implementations, the water supply pipe 22 is fitted with the inner wall of the test box 1, the bottom of the water supply pipe 22 is connected to the water supply assembly through the first joint 26, and a plurality of water supply holes 25 are provided on the side of the water supply pipe 22 facing the test box 1, and the outer side of the water supply pipe 22 is wrapped with filter gauze. Since the outer side of the water supply pipe 22 is wrapped with filter gauze, it can be prevented that too much mud in the simulated stratum flows into the water supply pipe 22 to block the water supply holes 25 of the water supply pipe 22, and the smooth operation of the water supply pipe 22 is ensured by the filter gauze. Moreover, when too much mud and sand are left on the filter gauze, the filter gauze can be replaced to ensure the mud and sand filtering capacity.

[0062] See also Figure 2 and Figure 3 As shown, in some implementations, the water supply pipe 22 includes a horizontal section 23 and an extension section 24, the horizontal section 23 is located below the extension section 24, the bottom of the extension section 24 is connected to the horizontal section 23, the horizontal section 23 extends horizontally, the water supply assembly is connected to the first joint 26 of the horizontal section 23, and the extension section 24 extends from bottom to top in a serpentine shape. In other words, the water supply assembly supplies water to the horizontal section 23 of the water supply pipe 22, and then guides the water to the extension section 24 extending from bottom to top in a serpentine shape through the horizontally extended horizontal section 23, and replenishes the water to the high position of the test box 1 through the extension section 24.

[0063] In some implementations, at least one water supply pipe 22 is installed on each side plate of the test box 1, each water supply pipe 22 has a horizontal section 23, and each horizontal section 23 corresponds to at least one extension section 24. Figure 3 As shown, in some implementations, part of the water supply pipe 22 includes two horizontal sections 23 and two extension sections 24, the two horizontal sections 23 are connected end to end through a three-way joint 27, and each horizontal section 23 is connected to a corresponding extension section 24, and the horizontal section 23 is connected to the extension section 24 through the three-way joint 27. When water is supplied through the water supply pipe 22 on the partition, the multiple three-way joints 27 connected through the horizontal section 23 can be extended into the test box 1 to achieve the connection between the water supply pipe 22 and the test box 1.

[0064] See also Figure 1 As shown, in some implementations, the water replenishment assembly includes a support frame 7, a suspension rope, a traction drive, and a second water tank 8. A pulley is installed on the support frame 7, the pulley cooperates with the suspension rope, one end of the suspension rope is connected to the traction drive, and the second water tank 8 is suspended at the end of the suspension rope away from the traction drive, and the second water tank 8 is connected to the first joint 26 of the water replenishment pipe 22 through the water supply pipe 13. That is to say, by pulling the suspension rope by the traction drive, the height of the second water tank 8 suspended on the suspension rope can be adjusted, so as to achieve the control of the water replenishment water pressure. When it is necessary to add more water to the simulated stratum in the test box 1, the suspension rope can be pulled by the traction drive to increase the height of the second water tank 8, so that the water in the second water tank 8 has a higher potential energy, so that the water in the second water tank 8 flows more smoothly into the test box 1. When the amount of water replenishment required for the simulated stratum in the test box 1 is small, the suspension rope can be pulled by the traction drive to lower the height of the second water tank 8.

[0065] See also Figure 1 as well as Figure 4 It is shown that in some implementations, the test box 1 includes a bottom plate and a plurality of vertical plates installed on the bottom plate, the vertical plates are connected end to end in sequence and enclosed with the bottom plate to form a chamber structure, and at least one vertical plate is a transparent observation plate 3. In other words, the bottom plate and the plurality of vertical plates connected end to end form a chamber structure in which the simulated stratum is buried. In order to more clearly show the settlement of the soil layer, in some implementations, colored sand with striking colors can be laid at the junction of two adjacent soil layer structures. When the soil layer structure sinks, the colored sand at the junction also sinks together. The use of colored sand can clearly show the degree of settlement of the soil layer structure.

[0066] Since one of the vertical plates of the test box 1 is a transparent observation plate 3, during the test, the soil layer changes of the simulated stratum in the test box 1 can be observed through the transparent observation plate 3, and the settlement changes of the soil layer can be intuitively displayed.

[0067] See also Figure 1 as well as Figure 4As shown, the outer side of the test box 1 is provided with reinforcing ribs 20, part of the reinforcing ribs 20 extend horizontally to improve the strength of the test box 1 in the length direction, part of the reinforcing ribs 20 extend vertically to improve the strength of the test box 1 in the vertical direction, and the horizontal reinforcing ribs 20 are connected to the vertical reinforcing ribs 20, so that the vertical reinforcing ribs 20 are used to connect two parallel and spaced horizontal reinforcing ribs 20, thereby improving the overall strength of the test box 1.

[0068] In some implementations, the seepage well model 4 is semi-cylindrical, and the seepage well model 4 is attached to the transparent observation plate 3 to enclose a third chamber. That is to say, the seepage well model 4 is attached to the transparent observation plate 3, so that the test personnel can directly observe the soil settlement at the seepage well model 4 through the transparent observation plate 3. In some implementations, the seepage well model 4 is made of a perforated PVC pipe, and a 250-mesh stainless steel mesh 28 is wrapped around the outer layer of the seepage well model 4. Among them, the seepage well model 4 can be fixed on the transparent observation plate 3 by hot melt adhesive.

[0069] In some implementations, the detection component 16 further includes a first industrial camera 18 and a second industrial camera 19, and both the first industrial camera 18 and the second industrial camera 19 are connected to the analysis device 17. The first industrial camera 18 faces the top surface of the simulated stratum, while the second industrial camera 19 faces the transparent observation plate 3. The first industrial camera 18 can record the changes in the top surface of the simulated stratum and the changes in the roadbed model 2 during the settlement process, and the second industrial camera 19 can shoot the cross-sectional changes of the simulated stratum through the transparent observation plate 3. The combination of the first industrial camera 18 and the second industrial camera 19 can more comprehensively record the changes in the simulated stratum.

[0070] In some implementations, the detection assembly 16 further includes a displacement sensor disposed at the bottom of the roadbed model 2, and the displacement sensor can be used to record the displacement data of the roadbed model 2 during the settlement process. In other words, the simulation test system provided by the present application can not only detect the settlement data of the simulated stratum, but also measure the displacement of the roadbed model 2 installed on the top of the simulated stratum, which is more accurate in analyzing the displacement of the railroad embankment caused by the settlement.

[0071] See also Figure 6 As shown, in a second aspect, an embodiment of the present invention further provides a simulation test method, which uses the above-mentioned simulation test system to perform a test, and includes the following steps:

[0072] S01: Fill the test box 1 to form a simulated stratum;

[0073] S02: the water supply component passes water to the water supply pipe 22, and uses the water supply pipe 22 to pass the water to the simulated formation in the test box 1;

[0074] S03: performing multiple types of settlement simulations alternately, using the detection component 16 to record soil layer data of the simulated strata during the settlement simulation, and closing the pumping component for a first time after each settlement simulation;

[0075] The types of settlement simulation include single-well simulation, first double-well simulation, second double-well simulation and multi-well simulation. The single-well simulation includes a pumping component pumping water from one of the infiltration well models 4, the first double-well simulation includes a pumping component pumping water from two adjacent infiltration well models 4, the second double-well simulation includes a pumping component pumping water from two infiltration well models 4 at both ends, and the multi-well simulation includes a pumping component pumping water from all of the infiltration well models 4.

[0076] Since at least three seepage well models 4 are provided in the test box 1, the operating condition simulations of various different groundwater extraction operations can be realized by controlling the pumping position of the pumping assembly. Among them, the single-well simulation can realize the operating condition simulation of groundwater extraction at a single location, and the first double-well simulation and the second double-well simulation can both simulate the simulation of groundwater extraction at two locations. Moreover, by comparing the settlement data of the first double-well simulation and the second double-well simulation, the influence of the extraction spacing on the settlement can be analyzed. The multi-well simulation can simulate the operating condition of collecting groundwater at multiple locations at the same time.

[0077] In some implementations, when using the detection component 16 to record the soil layer data of the simulated stratum during the settlement simulation, the data can be recorded every 10 minutes, and the relevant data can be transmitted to the computer of the analysis device 17, and the analysis device 17 can be used to implement data statistics and analysis.

[0078] The alternating multiple types of sedimentation simulations in step S03 are specifically as follows: firstly, a single well simulation is performed, and after the single well simulation is completed, the pumping assembly is closed for a first period of time (preferably 24 hours), and then the first double well simulation is performed; after the first double well simulation is completed, the pumping assembly is closed for a first period of time (preferably 24 hours), and then the second double well simulation is performed; after the second double well simulation is completed, the pumping assembly is closed for a first period of time (preferably 24 hours), and then the multi-well simulation is performed. In other implementations, the order of the single well simulation, the first double well simulation, the second double well simulation, and the multi-well simulation can be adjusted, and is not limited to the order of the single well simulation, the first double well simulation, the second double well simulation, and the multi-well simulation. By closing the pumping assembly for a first period of time after performing a sedimentation simulation, the water in the simulated formation in the test box 1 can be replenished to the initial state.

[0079] In some implementations, after completing the four types of sedimentation simulations, the pumping rate of the pumping component can be adjusted, or the water replenishment height of the water replenishment component can be changed to complete the sedimentation simulation again to compare the effects of different pumping rates on sedimentation and the effects of different water replenishment heights on sedimentation.

[0080] In the present application, since at least three seepage well models 4 are provided, the simulation of various pumping positions can be completed, and the influence of the pumping area on the settlement can be reflected more accurately.

[0081] In some implementations, the pumping assembly further includes a peristaltic pump 5, a pumping water pipe and a first water tank 6, one end of the peristaltic pump 5 is connected to the pumping water pipe, the pumping water pipe is used to be inserted into the infiltration well model 4, and the other end of the peristaltic pump 5 is connected to the first water tank 6;

[0082] The single well simulation further comprises: after the pumping assembly pumps water from one of the infiltration well models 4, switching the pumping direction of the peristaltic pump 5 to inject the water in the first water tank 6 into the infiltration well model 4 after the pumping;

[0083] The first double-well simulation further comprises, after the pumping assembly pumps water from two adjacent seepage well models 4: switching the pumping direction of the peristaltic pump 5 to inject water from the first water tank 6 into the seepage well model 4 after the pumping;

[0084] The second double-well simulation further comprises: after the pumping assembly pumps water from the two seepage well models 4 at both ends, switching the pumping direction of the peristaltic pump 5 to inject the water from the first water tank 6 into the seepage well model 4 after the pumping;

[0085] The multi-well simulation further comprises: after the pumping assembly pumps water from all the infiltration well models 4 , switching the pumping direction of the peristaltic pump 5 to inject the water from the first water tank 6 into the infiltration well models 4 after the pumping.

[0086] That is to say, not only can the pumping component be used to realize the pumping simulation, but the pumping component can also be used to realize the recharge simulation.

[0087] In order to more clearly illustrate the process of the simulation test, an embodiment of a simulation test method is provided below;

[0088] (1) Based on the similarity theory, the model test system is analyzed and derived, the test plan is formulated and the layout positions of the various detection components of the detection assembly 16 are determined. The roadbed model 2 and the seepage well model 4 are made according to the similarity theory;

[0089] (2) The test soil is prepared according to the distribution of the simulated strata. From bottom to top, it mainly includes a silty clay aquiclude, a medium-coarse sand aquiclude, a clay aquiclude, a silty fine sand aquiclude, a silty clay aquiclude, and group AB fillers used for roadbed construction.

[0090] (3) A water supply pipe 22 is installed on the side plate of the test box 1, and 100 mm thick silty clay is filled at the bottom of the test box 1 for water isolation. Three seepage well models 4 are arranged along the first direction and installed on the transparent observation board 3. The seepage well models 4 are connected to the transparent observation board 3 using hot melt adhesive.

[0091] (4) Fill the prepared test soil in layers in the test box 1, calculate the weight of the soil required for each 50 mm thickness according to the designed compaction degree, spread the required soil evenly, and use a compaction device to hammer the stratum to reach the designed thickness. During the filling process, the sensors of the detection assembly 16 are buried in the simulated stratum.

[0092] (5) Open the water supply assembly, and use the traction drive member to pull the suspension rope to adjust the liquid level of the second water tank 8 to the same height as the fine sand permeable layer in the test box 1 to reach the first water level. Let it stand for a period of time so that the water in the second water tank 8 is guided to the test box 1 through the water supply pipe 22.

[0093] (6) Single well simulation, 24 hours of static, first double well simulation, 24 hours of static, second double well simulation, 24 hours of static and multi-well simulation are performed in sequence. The soil layer change data during the pumping simulation is measured by the detection component 16.

[0094] (7) Change the pumping speed of the peristaltic pump 5 and repeat step (6), or change the liquid level of the second water tank 8 and repeat step (6)

[0095] (8) When performing step (6), the pumping direction of the peristaltic pump 5 can be switched after pumping water, so that the water in the first water tank 6 is recharged into the previously pumped infiltration well model 4 to implement a recharge test.

[0096] (9) Compare the settlement of the roadbed model 2 in step (6) whose cylinder is not filled with cement and the settlement of the roadbed model 2 in which the cylinder is filled with cement.

[0097] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A simulation test system, characterized in that: It includes: A test box, wherein the test box is used to be filled with a simulated formation; A water supply pipe is installed in the test box, and the water supply pipe is connected to a first joint; A roadbed model, the roadbed model is used to be installed on the top of the simulated stratum; A detection component, the detection component includes a settlement mark, a strain sensor, a pore water pressure sensor, an earth pressure sensor and an analysis device, and the detection component is installed in the test box to detect the formation changes in the test box; At least three seepage well models are arranged along a first straight line, the seepage well models are installed in the test box, the seepage well models are spaced apart from each other, and the side walls of the seepage well models are provided with a plurality of seepage holes; a water replenishment assembly having a water supply pipe, wherein the water supply pipe is connected to the first joint; and A water pumping component is used to extract water from the seepage well model.

2. The simulation test system according to claim 1, characterized in that: The roadbed model comprises a main body and a cylinder, wherein the cylinder is connected to the bottom of the main body and inserted into the simulated stratum.

3. The simulation test system according to claim 1 or 2, characterized in that: At least two roadbed models are installed on the top of the simulated stratum, the cylinders of some roadbed models are filled with cement, and the cylinders of other roadbed models are not filled with cement.

4. The simulation test system according to claim 1 or 2, characterized in that: The pumping assembly also includes a peristaltic pump, a pumping water pipe and a first water tank. One end of the peristaltic pump is connected to the pumping water pipe, and the pumping water pipe is used to be inserted into the infiltration well model. The other end of the peristaltic pump is connected to the first water tank. The pumping direction of the peristaltic pump is switchable.

5. The simulation test system according to claim 1 or 2, characterized in that: The water supply pipe is fitted with the inner wall of the test box, the water supply pipe is provided with a plurality of water supply holes, and the outer side of the water supply pipe is wrapped with filter gauze.

6. The simulation test system according to claim 5, characterized in that: The water supply pipe includes a horizontal section and an extension section, the horizontal section extends horizontally, the horizontal section is located below the extension section and is connected to the first joint, and the bottom of the extension section is connected to the horizontal section, and the extension section extends in a serpentine shape from bottom to top.

7. The simulation test system according to claim 6, characterized in that: The water replenishment assembly includes a support frame, a suspension rope, a traction drive component and a second water tank. A pulley is installed on the support frame, and the pulley cooperates with the suspension rope. One end of the suspension rope is connected to the traction drive component. The second water tank is hung on the end of the suspension rope away from the traction drive component, and the second water tank is connected to the test box through a first water pipe.

8. The simulation test system according to claim 1, characterized in that: The test box includes a transparent observation plate, through which the simulated stratum in the test box can be observed.

9. The simulation test system according to claim 8, characterized in that: The seepage well model is semi-cylindrical, and the seepage well model is attached to the transparent observation plate to form a third chamber.

10. The simulation test system according to claim 1, characterized in that: The detection component also includes a displacement sensor arranged at the bottom of the roadbed model.

11. A simulation test method, characterized in that: The test is carried out using the simulation test system according to any one of claims 1 to 10, which comprises the following steps: Filling the test box to form a simulated stratum; The water supply component passes water to the water supply pipe, and uses the water supply pipe to pass the water to the simulated formation in the test box; Perform various types of settlement simulations alternately, use the detection component to record the soil layer data of the simulated strata during the settlement simulation, and shut down the pumping component for a first period of time after each settlement simulation; The types of settlement simulation include single-well simulation, first double-well simulation, second double-well simulation and multi-well simulation, wherein the single-well simulation includes a pumping component pumping water from one of the seepage well models, the first double-well simulation includes a pumping component pumping water from two adjacent seepage well models, the second double-well simulation includes a pumping component pumping water from two seepage well models at both ends, and the multi-well simulation includes a pumping component pumping water from all the seepage well models.

12. The simulation test method according to claim 11, characterized in that: The pumping assembly further includes a peristaltic pump, a pumping water pipe and a first water tank, one end of the peristaltic pump is connected to the pumping water pipe, the pumping water pipe is used to be inserted into the seepage well model, and the other end of the peristaltic pump is connected to the first water tank; The single well simulation further comprises: after the pumping assembly pumps water from one of the infiltration well models, switching the pumping direction of the peristaltic pump to inject the water in the first water tank into the infiltration well model after the pumping; The first double-well simulation further comprises: after the pumping assembly pumps water from two adjacent seepage well models, switching the pumping direction of the peristaltic pump to inject water from the first water tank into the seepage well model after the pumping; The second double-well simulation further comprises: after the pumping assembly pumps water from the two seepage well models at both ends, switching the pumping direction of the peristaltic pump to inject the water in the first water tank into the seepage well model after the pumping; The multi-well simulation further comprises: after the pumping assembly pumps water from all the infiltration well models, switching the pumping direction of the peristaltic pump to inject the water in the first water tank into the infiltration well models after the pumping.

Images