CN112986064B - Experimental device for simulating karst pipeline network water burst blocking - Google Patents

Abstract

The invention relates to an experimental device for simulating water gushing plugging of a karst pipeline network, which comprises a plurality of karst pipelines, two adjacent karst pipelines are connected by branch pipelines to form a karst pipeline network, and the karst pipelines of the karst pipeline network have various sizes and specifications. One end of the karst pipeline network is connected to the water supply mechanism and the grouting mechanism, and the other end is provided with a collection mechanism. The karst pipeline and branch pipeline are equipped with pressure monitoring parts and water stop valves. The experimental device of the present invention can simulate karst The grouting plugging of pipe network has guiding significance for practical engineering.

Description

An experimental device for simulating water gushing plugging of karst pipeline network

technical field

The invention relates to the technical field of experimental equipment, in particular to an experimental device for simulating water gushing plugging of a karst pipeline network.

Background technique

The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

At present, underground engineering construction has entered a period of rapid development, with mostly karst landforms and complex geological structures. Among them, the problem of inrush water is the main geological disaster in tunnel construction. In the excavation of underground tunnels, if it encounters an area with abundant groundwater, the excavation is often blocked, which consumes a lot of time, manpower, materials and equipment, and in severe cases, the tunnel collapses and the project fails.

In the grouting reinforcement process, the water-bearing karst pipeline network often contains a series of intricate karst pipelines with different diameters. In the traditional water inrush grouting plugging process, it is difficult to accurately find the main inrush water pipeline for grouting reinforcement. Moreover, the amount of grout, the distribution of grout flow, the time of grouting reinforcement, and the effect of grouting reinforcement will be very different when drilling and grouting plugging of karst pipelines with different diameters, especially in micro-karst pipelines. Whether the slurry can fill the entire karst pipeline and whether it can achieve the desired effect has not yet been studied, and it is a major problem that needs to be solved at present. Solving such problems can form a new theory of grouting reinforcement, which can provide better theoretical guidance for the plugging of broken zones in water-bearing multi-karst pipelines.

Relevant researchers at home and abroad have carried out a series of single karst pipeline water gushing grouting plugging model tests, mainly revealing the effect of grouting reinforcement of a single karst pipeline during grouting reinforcement. When drilling and grouting reinforcement of karst pipelines with different diameters, the flow distribution and grouting reinforcement effects of main karst pipelines with different diameters are studied, and the overall The flow distribution and reinforcement of the karst pipeline network. At this time, a single karst pipeline model cannot meet this requirement.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, to provide an experimental device for simulating water gushing plugging of karst pipeline network, which can realize the flow distribution and reinforcement of karst pipeline network drilling and grouting plugging, and has better Theoretical guiding significance.

To achieve the above object, the present invention adopts the following technical solutions:

In the first aspect, the present invention provides an experimental device for simulating water gushing plugging of a karst pipeline network, which includes a plurality of karst pipelines, two adjacent karst pipelines are connected by branch pipelines to form a karst pipeline network, and the karst pipelines of the karst pipeline network have Various sizes and specifications, one end of the karst pipeline network is connected to the water supply mechanism and the grouting mechanism, and the other end is provided with a collection mechanism, and the karst pipeline and branch pipeline are equipped with pressure monitoring components and water stop valves.

Further, the karst pipeline is formed by splicing multiple pipe sections, and each pipe section is equipped with a pressure monitoring device and a water stop valve.

Further, the water supply mechanism includes a pressure-bearing water tank, the pressure-bearing water tank is connected to the water supply pump through the pipeline, the water supply pump is connected to the water supply tank through the pipeline, and the pressure-bearing water tank is also connected to the air compressor through the pipeline. The water outlet of the pressurized water tank is connected with the karst pipeline network.

Further, a pressure controller is installed on the pipeline between the air compressor and the pressurized water tank.

Further, the grouting mechanism includes a pressure testing machine, a stirring tank is arranged under the pressure head of the pressure testing machine, and a stirring assembly connected to the power mechanism is arranged in the stirring tank, and the discharge port of the stirring tank Connect with the karst pipeline network.

Further, the pressure head of the pressure testing machine is provided with an exhaust pipe, and an exhaust valve is installed on the exhaust pipe.

Further, a guide rail is provided under the indenter of the pressure testing machine, and the stirring tank is slidably connected to the guide rail, and the agitating tank can be moved to or away from the position directly under the indenter through the guide rail.

Further, the karst pipe network is placed on a support plate, and the support plate is connected with a plurality of jacking pieces, and the jacking pieces are used to adjust the height of the support plate.

Further, the collection mechanism includes a collection box, the bottom of the collection box is provided with a drain, and the drain is provided with an overflow pipe inside the collection box.

Further, the karst pipeline and the branch pipeline are made of transparent materials, and an image acquisition element is arranged on one side of the karst pipeline.

Beneficial effects of the present invention:

1. The experimental device of the present invention has a plurality of karst pipelines, and the karst pipelines have multiple different specifications. A plurality of karst pipelines are connected by branch pipelines to form a karst pipeline network, and each karst pipeline is provided with a pressure detection piece and a stopper. The water valve, the karst pipe network are connected with the water supply mechanism and the grouting mechanism, which can simulate the flow distribution and diffusion blocking of the grout in different karst pipes in the karst pipe network, and can more realistically simulate the plugging of the water-bearing karst pipe network by granular materials The situation of the broken zone can make an effective prediction on the filling situation of the karst pipeline in the rock mass after the drilling and grouting of the karst pipeline with different diameters, and whether the rock mass reaches the expected strength after reinforcement. The diffusion mechanism in the water-bearing structure and the mechanism of plugging water gushing provide the basis for establishing relevant mathematical models and proposing grouting theories such as plugging water inrush in fractured zones with granular materials, and provide reference for engineering grouting plugging.

2. In the experimental device of the present invention, the grouting mechanism includes a pressure testing machine and a mixing tank. While the slurry is being stirred, the pressure testing machine can evenly press the slurry into the karst pipe network at a constant pressure or constant speed to ensure that the injection The uniformity and stability of the grout in the karst pipeline network, and the injection amount of the grout can be freely adjusted through the pressure testing machine, so relying on this experimental device, the granular grouting materials with different grouting amounts and different grouting pressures can be used to correct the cracks in the broken zone. Plugging simulation test of water inrush.

3. In the experimental device of the present invention, the karst pipeline is composed of multiple pipe sections, which are easy to disassemble, easy to operate, and can be recycled. After the experiment is completed, the pipe sections can be removed, and the water pressure of the granular grouting material can be tested with the cooperation of the water supply mechanism. The ultimate bearing capacity is used to evaluate the plugging effect of granular grouting materials.

4. In the experimental device of the present invention, an overflow pipe is provided at the outlet of the collection box of the collection mechanism, and the slurry entering the collection box can settle. When the height is high, the sewage can be discharged through the overflow pipe and the drain, which greatly improves the sewage storage capacity.

5. In the experimental device of the present invention, the karst pipeline is made of transparent material, which realizes the visualization of the experimental process and facilitates qualitative description of the blocking water inrush during the experimental process.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and not to limit the present application.

Fig. 1 is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

Fig. 2 is the schematic diagram of karst pipeline network of embodiment 1 of the present invention;

Fig. 3 is a schematic diagram of the pipe section structure of the karst pipeline in Example 1 of the present invention;

Fig. 4 is a schematic structural diagram of the grouting mechanism in Embodiment 1 of the present invention;

Fig. 5 is the front view of the grouting mechanism of Embodiment 1 of the present invention;

Fig. 6 is the top view of the stirring tank of Embodiment 1 of the present invention;

Fig. 7 is a schematic diagram of the collection mechanism of Embodiment 1 of the present invention;

Figure 8 is a schematic diagram of the installation of a support plate and a threaded jack in Embodiment 1 of the present invention;

Fig. 9 is a schematic structural diagram of the plugging pressure test section in Embodiment 1 of the present invention;

Among them, 1. Karst pipeline network, 1-1. Main karst pipeline, 1-2. Micro karst pipeline, 1-3. Secondary karst pipeline, 1-4. Branch pipeline, 1-5. Tee, 1-6 .Live screw, 1-7. Water flow pressure sensor, 1-8. Pipe network stop valve, 1-9. HD camera, 2. Input main pipe, 3. Water supply mechanism, 3-1. Pressurized water tank, 3- 2. Water supply pump, 3-3. Water supply tank, 3-4. Air compressor, 3-5. Pressure controller, 3-6. Water flow sensor, 3-7. Flow valve, 4. Grouting mechanism, 4 -1. Universal pressure testing machine, 4-2. Stirring tank, 4-3. Rotating rod, 4-4. Stirring shaft, 4-5. Belt transmission mechanism, 4-6. Driving motor, 4-7. Pressure head , 4-8. Exhaust pipe, 4-9. Grouting flow sensor, 4-10. Grouting pressure sensor, 4-11. Grouting water stop valve, 5. Collection mechanism, 5-1. Collection box, 5 -2. Collection box bracket, 5-3. Overflow pipe, 5-4. Rubber hose, 6. Host computer, 7. Support plate, 8. Threaded jack.

Detailed ways

It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the directions of up, down, left and right of the drawings themselves, and do not limit the structure. It is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

As introduced in the background technology, the existing experimental devices are unable to conduct research on the reinforcement effect of drilling and grouting of karst pipeline networks. In view of the above problems, this application proposes an experimental device for simulating water gushing plugging of karst pipeline networks.

In a typical implementation of the present application, as shown in Figures 1-8, an experimental device for simulating water gushing plugging of a karst pipeline network includes a karst pipeline network 1, and the karst pipeline network includes a plurality of parallel arrangements with different For karst pipelines of specified sizes, multiple branch pipelines 1-4 are connected between adjacent karst pipelines, and multiple karst pipelines and branch pipelines together form a karst pipeline network.

Preferably, the karst pipeline network has three specifications of karst pipelines, the karst pipeline with the largest diameter is used to simulate the main karst pipeline 1-1, the karst pipeline with the smallest diameter is used to simulate the micro karst pipeline 1-2, and the third size The karst pipelines are used to simulate sub-karst pipelines 1-3.

In this embodiment, the karst pipelines and branch pipelines are made of transparent acrylic material, which realizes the visualization of the experimental process and facilitates qualitative description of the blocking water inrush during the experimental process.

Preferably, the karst pipeline is formed by splicing a plurality of pipe sections, and at the splicing position, the branch pipeline is connected through a tee 1-5. Specifically, among two adjacent pipe sections, one of the pipe sections is connected to the pipe section through a live screw 1-6 One port of the tee is connected, the other port of the tee is connected with another pipe section through a live screw, and the third port of the tee is connected with a branch pipe. In this embodiment, the adjacent pipe sections are connected with a live screw, which can realize Any combination of pipes with different diameters, and compared with flanges, it is not easy to leak, easy to disassemble and easy to clean.

In this embodiment, a pressure detection piece is installed on the middle part of the bottom of each pipe section, and a pressure detection piece is also installed on the branch pipeline. The pressure detection piece adopts water flow pressure sensors 1-7, and the water flow pressure sensor It is connected with the control system, and the detected pressure information can be transmitted to the control system. Preferably, the water flow pressure sensor is connected with the paperless recorder through the control system, and the paperless recorder is connected with the host computer through the data line, and can be connected with the host computer through the host computer. The software installed on the computer directly draws the water flow pressure-time change curve and the flow-time change curve.

In this embodiment, each section of the karst pipeline is equipped with a pipe network water stop valve 1-8, and the branch pipes are equipped with a pipe network water stop valve.

Through the pipe network stop valve, the flow of different pipes can be controlled.

Close the pipe network stop valves of all branch pipelines, which can be used to simulate the flow distribution and grouting reinforcement effect of karst pipelines with different diameters, and close the main karst pipeline, sub-karst pipeline and micro-karst pipeline respectively for drilling and grouting reinforcement The flow distribution and reinforcement of the entire karst pipeline.

In this embodiment, one side of the karst pipeline is provided with an image acquisition element, preferably, the image acquisition element adopts a high-definition camera 1-9, and the high-definition camera is connected to a control system, and can collect grouting materials in the karst pipeline A picture of the hydraulic blockage situation and transmitted to the control system.

The ends of the main karst pipeline, sub-karst pipeline and micro-karst pipeline are all connected to the main input pipe 2, and the main input pipe is connected to the water supply mechanism and the grouting mechanism.

The water supply mechanism 3 includes a pressure-bearing water tank 3-1, the pressure-bearing water tank has a water inlet, the water inlet is connected to the water supply pump 3-2 through a pipeline, and the water supply pump is connected to the water supply tank 3-3 , the water supply tank is used to contain water, and the water supply pump can drive the water in the water supply tank to enter the pressurized water tank.

The pressurized water tank also has an air inlet, and the air inlet is connected with the air compressor 3-4 through a pipeline, and the air compressor can pass into the pressure-bearing water tank through the pipeline and the air inlet. Gas, a pressure controller 3-5 is installed on the pipeline between the air compressor and the pressurized water tank, and the pressure controller is connected with the air compressor through a data line to control the air compressor to enter the pressure The gas pressure of the tank. Through the control of the pressure in the pressurized water tank, the adjustment of the water pressure in the karst pipe network is realized, and the stability of the water pressure in the karst pipe network is guaranteed.

The pressure-bearing water tank has a water outlet, and the water outlet is connected to the input main pipe through a pipeline. After the air compressor feeds gas into the pressure-bearing water tank, it can drive the water in the pressure-bearing water tank to flow out through the water outlet and enter Enter the main pipe and then enter the karst pipe network.

Preferably, the pipeline adopts a water hose, and a water flow sensor 3-6 and a flow valve 3-7 are installed on the pipeline between the water outlet of the pressure-bearing water tank and the input main pipe, and the flow sensor is connected to the control system , used to detect the flow of water entering the karst pipe network, and the flow valve is used to adjust the flow of water entering the karst pipe network.

The grouting mechanism 4 includes a pressure testing machine. Preferably, the pressure testing machine adopts an existing universal pressure testing machine 4-1, which includes elements such as a main body frame, a loading driver and an indenter connected to the loading driver. The specific structure will not be described in detail here.

A guide rail is provided below the pressure head, and the guide rail is slidingly connected with the mixing tank 4-2. The mixing tank can be dragged horizontally, which is convenient for loading and rinsing. Rod 4-3, the central part of the rotating rod is sealed and rotated with the bottom shell wall of the mixing tank, the rotating rod is provided with a plurality of stirring shafts 4-4, the rotation of the rotating rod can drive the stirring shaft to move, and then the stirring tank The slurry inside is stirred, the rotating rod is connected with the power mechanism, the power mechanism includes a transmission mechanism and a driving part, the transmission mechanism adopts the existing belt transmission mechanism 4-5, and is installed on the mounting plate at the bottom of the mixing tank. It includes a driving pulley, a driven pulley and a transmission belt wound between the driving pulley and the driven pulley, the driving pulley is connected to the driving part, and the driving part is installed on the mounting plate. Preferably, the driving Part adopts drive motor 4-6. The driven pulley is connected with the rotating rod through the wheel shaft, and can drive the rotating rod to rotate.

Preferably, the pressure head 4-7 of the universal pressure testing machine is provided with an exhaust pipe 4-8, and the exhaust pipe is provided with an exhaust valve. The air is exhausted. Secondly, after the grouting is completed, it can be ventilated through the exhaust pipe to press out the remaining material in the mixing tank for easy cleaning.

The universal pressure testing machine is connected with the control system and can work under the control of the control system. It has control modes such as constant velocity test force, constant velocity stress, and test force maintenance. It can not only perform constant pressure grouting but also constant flow rate grouting. The stirring shaft stirs and mixes a variety of raw materials to obtain a mixture of expected consistency, and maintains a suitable consistency of the slurry during the grouting process. In the process of simulated grouting reinforcement, while the stirring shaft is stirring the grouting material, the pressure head of the universal pressure testing machine injects the grouting material into the karst pipeline network uniformly at a constant pressure or constant speed, during the grouting process It can prevent the segregation and precipitation of the slurry to ensure the uniform stability of the slurry injected into the karst pipeline network.

The stirring tank is provided with a discharge port, and the discharge port is connected to the input main pipe through a pipeline, so that the internal slurry can be sent into the input main pipe through the discharge port and the pipeline, and then enter the karst pipe network.

A grouting volume sensor 4-9 and a grouting pressure sensor 4-10 connected to the control system are installed on the pipeline between the mixing tank and the input main pipe, and the grouting flow sensor and the grouting pressure sensor are used to detect the grouting pressure sensor respectively. Flow stack and grouting pressure, and transmit the detected flow and pressure information to the control system. A grouting water stop valve 4-11 is also installed on the pipeline between the stirring tank and the input main pipe.

One end of the main karst pipeline, secondary karst pipeline and micro-karst pipeline is connected to the input main pipe, and the other end is provided with a collection mechanism, and the water and slurry in the karst pipe network can flow into the collection mechanism.

The collection mechanism 5 includes a collection box 5-1, the collection box is installed on the collection box support 5-2, the bottom wall of the collection box has a drain, and the drain is provided with an overflow pipe 5 -3, the overflow pipe is located inside the collection box, the overflow pipe is arranged coaxially with the drain outlet, the overflow pipe is fixed on the bottom wall of the collection box, and is vertically arranged with the bottom wall of the collection box.

A rubber hose 5-4 is also connected to the outlet, and the rubber hose is arranged outside the collection box for discharging sewage in the collection box.

The sewage in the karst pipeline network enters the collection box. Due to the existence of the overflow pipe, the sewage settles in the collection box, and the granular material settles at the bottom of the collection box. When the liquid level is higher than the overflow pipe, the sewage enters the overflow pipe and then It is discharged through a rubber hose, which greatly improves the dirt storage capacity.

In this embodiment, the control system is connected with the upper computer 6, and the information collected by each sensor can be displayed on the upper computer, and the staff can also send instructions to the control system through the upper computer.

The experimental device of this embodiment can simulate the flow distribution and diffusion blocking of slurry in different karst pipelines in the karst pipeline network, and can more realistically simulate the situation of granular materials blocking the broken zone of the hydrous karst pipeline network. The filling situation of the karst pipeline in the rock mass after the drilling and grouting of the pipe diameter karst pipeline is carried out, and whether the rock mass reaches the expected strength after reinforcement is effectively predicted, and the diffusion mechanism of granular materials in the water-bearing structure is accurately studied. The mechanism of plugging water gushing provides a basis for establishing relevant mathematical models and proposing grouting theories such as plugging water gushing in cracks in broken zones with granular materials, and provides a reference for engineering grouting plugging.

In this embodiment, the karst pipeline network is placed on the support plate 7, and the support plate is connected with a plurality of jacking parts, and is supported by the jacking parts. Preferably, the jacking parts are threaded jacks 8, The karst pipe network can be adjusted to a horizontal state through multiple threaded jacks.

The working method of the experimental device of the present embodiment is:

Connect the pipeline connected to the outlet of the mixing tank with the grouting flower pipe, insert the grouting flower pipe into the grouting hole set in the input main pipe, and arrange the grouting pressure sensor and the grouting flow sensor.

According to the geological conditions of the broken zone encountered in the construction, the flow and velocity of the inrush water, adjust the pressure control instrument of the water supply mechanism to provide the dynamic water conditions similar to the project, and arrange it in the middle part of the bottom of each pipe section of the karst pipeline Dynamic water flow sensor and water pressure sensor, adjust the threaded jack, and adjust the acrylic tube to a horizontal state.

Connect the water outlet of the pressurized water tank of the water supply mechanism with the input main pipe through the pipeline, and arrange the water flow sensor and flow valve.

Connect the arranged sensors to the data acquisition device, connect the data material device to the control system, and set the acquisition frequency and data storage parameters through the host computer.

Add granular casting materials into the mixing tank, adjust the pressure controller, and provide different dynamic water flow rates to the karst pipelines. After the flow rate is stable, turn on the universal pressure testing machine and set the grouting pressure to the preset value.

Keep the three water outlets from the right end of the karst pipeline network all open, observe the flow distribution of the grout in the entire karst pipeline network during the grouting reinforcement process, continue grouting, and observe whether the entire karst pipeline network can be completely filled;

After the granular grouting materials in karst pipes with three different diameters diffuse to the boundary of the water outlet or the granular grouting materials in karst pipes of a certain diameter diffuse to the boundary of the water outlet and the granular grouting materials in karst pipes of other diameters do not Stop grouting when re-diffusion or when the moving water flow is completely blocked by granular materials; observe and record real-time monitoring and recording of hydraulic pressure plugging of granular grouting materials under different flow rates;

As shown in Figure 9, remove the pipe section of the karst pipeline used as the plugging pressure test section, and connect it to the water supply mechanism through live screws. After the connection is completed, slowly apply water pressure to the granular plugging material in the pipe section to test the plugging The ultimate pressure bearing capacity of the section can be used to quantitatively evaluate the plugging effect.

In this embodiment, the water supply mechanism is used to pressurize the plugging slurry in the pipe section used as the plugging pressure test section, and the pressure required to break the plugging slurry is measured, so as to calculate the overall pressure bearing capacity of the entire karst pipeline network. Secondly, it can also be calculated where is the pressure-bearing weak area.

Disassemble and clean and reinstall the experimental device, then close the sub-karst pipeline and micro-karst pipeline in turn, repeat the above experimental steps, observe and record that when karst pipelines with different diameters are grouted and reinforced, the grout in the entire karst pipeline network Continuous grouting to observe whether the entire karst pipeline network can be completely filled.

Disassemble and reinstall karst pipelines of three different diameters according to different positions, carry out the grouting reinforcement experiment again, observe and record the flow distribution and filling conditions of the grout in the entire karst pipeline network at different positions;

By changing different experimental conditions, the effects of dynamic water velocity, grouting pressure, and dosage of granular materials on the flow distribution and grouting reinforcement effect of karst pipelines with different pipe diameters can be obtained.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (7)

1. An experimental device for simulating water gushing plugging of a karst pipeline network, characterized in that it comprises a plurality of karst pipelines, two adjacent karst pipelines are connected by branch pipelines to form a karst pipeline network, and the karst pipelines of the karst pipeline network have multiple Dimensions and specifications, one end of the karst pipeline network is connected to the water supply mechanism and the grouting mechanism, and the other end is provided with a collection mechanism, and the karst pipeline and branch pipeline are equipped with pressure monitoring components and water stop valves; The karst pipeline is formed by splicing a plurality of pipe sections, and each pipe section is equipped with a pressure monitoring device and a water stop valve; the karst pipeline is formed by splicing a plurality of pipe sections, and a branch pipeline is connected at the splicing position; The grouting mechanism includes a pressure testing machine. A stirring tank is arranged under the pressure head of the pressure testing machine. A stirring assembly connected to the power mechanism is arranged in the stirring tank. The discharge port of the stirring tank is connected to the karst pipeline. network connection; The ends of karst pipelines of various sizes and specifications in the karst pipeline network are all connected to the input main pipe, and the input main pipe is connected to the water supply mechanism and the grouting mechanism. The mixing tank is provided with a discharge port, and the discharge port passes through The pipeline is connected with the input main pipe; A grouting volume sensor and a grouting pressure sensor connected to the control system are installed on the pipeline between the stirring tank and the input main pipe; A grouting water stop valve is also installed on the pipeline between the mixing tank and the input main pipe; A guide rail is provided under the indenter of the pressure testing machine, and the stirring tank is slidably connected with the guide rail, and the agitating tank can be moved to or away from the position directly under the indenter through the guide rail. 2. A kind of experimental device for simulating karst pipeline network gushing water plugging as claimed in claim 1, characterized in that, the water supply mechanism comprises a pressurized water tank, and the pressurized water tank is connected with a water supply pump through a pipeline, and the water supply The water pump is connected to the water supply tank through pipelines, the pressurized water tank is also connected to the air compressor through pipelines, and the water outlet of the pressurized water tank is connected to the karst pipeline network. 3. The experimental device for simulating karst pipeline network gushing water plugging as claimed in claim 2, characterized in that a pressure controller is also installed on the pipeline between the air compressor and the pressurized water tank. 4. A kind of simulated karst pipeline network water gushing plugging experiment device as claimed in claim 1, is characterized in that, the pressure head of described pressure testing machine is provided with exhaust pipe, and exhaust valve is installed on the described exhaust pipe . 5. A kind of simulated karst pipeline network water gushing plugging experiment device as claimed in claim 1, characterized in that, the karst pipeline network is placed on a support plate, and the support plate is connected with a plurality of jacking parts, and the jacking to adjust the height of the support plate. 6. A kind of experimental device for simulating karst pipeline network gushing water plugging as claimed in claim 1, characterized in that, the collection mechanism comprises a collection box, the bottom of the collection box is provided with a drainage outlet, and the drainage outlet is provided with An overflow pipe is provided inside the collection tank. 7. The experimental device for simulating water gushing plugging of a karst pipeline network as claimed in claim 1, wherein the karst pipeline and branch pipelines are made of transparent materials, and one side of the karst pipeline is provided with an image acquisition element.