A test device for studying variation law of calcium ion content in seepage water

Abstract

The utility model relates to a kind of test device for the change rule research of calcium ion content in leakage water, including tunnel model device and water supply system, the water supply system includes water level water tank and bucket, water level water tank is installed on lifting device and keeps certain height, the water inlet end of water level water tank is connected with bucket by circulating water supply pipe, the water outlet of water level water tank is connected with tunnel model device by constant head water supply pipe, the tunnel model device is equipped with seepage mouth, the water in the bucket is continuously supplied to water level water tank by circulating water supply pipe, water level water tank provides the moisture of constant water pressure to tunnel model device by constant head water supply pipe, leakage water in tunnel model device is seeped by seepage mouth.This device is used to study the influence of groundwater head on calcium ion content in tunnel leakage water, simple structure, convenient operation and lower cost.

Description

Technical Field

[0001] This utility model relates to the field of tunnel seepage technology, and in particular to an experimental device for studying the variation law of calcium ion content in seepage water. Background Technology

[0002] Water leakage can lead to erosion and corrosion of tunnel segments, seriously affecting the structural safety and normal service life of the tunnel. Leaking water carries away Ca(OH)2 from the tunnel segments (concrete), which then reacts with CO2 in the air to form Ca(CO3). Ca(CO3) deposits gradually adhere to the inner walls of the pipes, narrowing the pipe diameter and even completely blocking drainage holes, floor drains, branch pipes, and other critical components. This slows down drainage and, in severe cases, causes water accumulation inside the tunnel, threatening traffic safety or structural stability. Currently, experimental devices for studying the changes in calcium ion content include atomic absorption spectrometers, which are complex, costly, and require specialized operators. This experimental device, however, can highly replicate the tunnel environment and is simple to operate. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a test device for studying the variation law of calcium ion content in leakage water that is simple in structure, easy to operate and low in cost.

[0004] This utility model is accomplished using the following technical solution: an experimental device for studying the variation law of calcium ion content in seepage water, comprising a tunnel model device and a water supply system. The water supply system includes a water level tank and a water bucket. The water level tank is installed on a lifting device and maintained at a certain height. The water inlet of the water level tank is connected to the water bucket through a circulating water supply pipe. The water outlet of the water level tank is connected to the tunnel model device through a constant head water supply pipe. The tunnel model device is provided with a seepage port. Water in the water bucket is continuously supplied to the water level tank through the circulating water supply pipe. The water level tank provides water at a constant pressure to the tunnel model device through the constant head water supply pipe. Seepage water in the tunnel model device seeps out through the seepage port.

[0005] Furthermore, the tunnel model device includes a model box and a tunnel model. The tunnel model is installed inside the model box, which is filled with sand. The sand is located outside the tunnel model. A water inlet is provided at the bottom of the model box, and the outlet of a constant water head water supply pipe is connected to the water inlet. A seepage outlet is provided on one side of the model box, and a seepage container is provided at the seepage outlet.

[0006] Furthermore, a pad is provided on one side of the bottom of the model box, so that the model box is tilted with the front lower and the back higher, and the water outlet is located on the lower side.

[0007] Furthermore, the water tank is also equipped with an overflow outlet, which is connected to the water bucket via an overflow pipe.

[0008] Furthermore, a circulating water pump is installed on the circulating water supply pipe, which transfers the water in the water bucket to the water level tank.

[0009] Furthermore, the model box consists of a box body and a box lid, the box lid is provided with a vent hole, and the vent hole is fitted with a plug.

[0010] Furthermore, the box body has mounting holes on its symmetrical side walls. The tunnel model is mounted on the mounting holes at both ends via flanges. A sealing ring is provided at the junction of the tunnel model and the mounting holes to prevent water leakage from seeping out through the interface.

[0011] Furthermore, the model box is made of acrylic material, and the box body is composed of multiple panels, with adjacent panels fixed together by sealant.

[0012] The beneficial effects of this utility model are:

[0013] 1) The tunnel model is placed inside the model box and water is supplied to the model box using a constant head water supply pipe to closely replicate the actual use environment of the tunnel and ensure the accuracy of the test.

[0014] 2) The water level tank is installed on the lifting device to maintain a certain height, ensuring that the water level tank provides a high water pressure to the tunnel model device, which can accelerate water infiltration and ensure that the clean water pressure in the model box is constant.

[0015] 3) The experimental device of this utility model has a simple structure and low cost, and is used to study the effect of groundwater head on the calcium ion content in tunnel seepage water. Attached Figure Description

[0016] Figure 1 This is a front view schematic diagram of an experimental device used to study the variation law of calcium ion content in seepage water;

[0017] Figure 2 yes Figure 1 A top-view structural diagram;

[0018] Figure 3 yes Figure 1 A schematic diagram of the left-side view structure.

[0019] Labeling Descriptions: 1. Water level tank; 2. Water bucket; 3. Lifting device; 4. Water inlet; 5. Water outlet; 6. Overflow outlet; 7. Circulating water supply pipe; 8. Constant head water supply pipe; 9. Overflow pipe; 10. Circulating water pump; 11. Model box; 12. Tunnel model; 13. Water inlet; 14. Seepage outlet; 15. Seepage container; 16. Gasket; 17. Sealing flange; 18. Vent hole; 19. Plug; 20. Mounting hole; 111. Box body; 112. Box cover. Detailed Implementation

[0020] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0021] Reference Figures 1-3 As shown, this utility model provides an experimental device for studying the variation law of calcium ion content in seepage water, including a tunnel model device and a water supply system.

[0022] The water supply system includes a water level tank 1 and a water bucket 2. The water level tank is installed on a lifting device 3 and maintained at a certain height. The lifting device 3 is preferably a fixed lifting frame or a lifting device with a lifting function. The lifting device with a lifting function can have lifting devices configured on both sides of the mounting rod used to install the water level tank, allowing the mounting rod to move the water level tank up and down to the required height. The water level tank 1 has an inlet 4, an outlet 5, and an overflow 6. The inlet 4 of the water level tank is connected to the water bucket 2 via a circulating water supply pipe 7. The outlet of the water level tank 1 is connected to the tunnel model device via a constant head water supply pipe 8. The overflow 6 is connected to the water bucket 2 via an overflow pipe 9. A circulating water pump 10 is installed on the circulating water supply pipe 7, which transfers water from the water bucket 2 to the water level tank 1. The constant head water supply pipe 8 is equipped with a valve. When the valve of the constant head water supply pipe 8 is opened, the water level tank provides water at a constant pressure to the tunnel model device.

[0023] The tunnel model device includes a model box 11 and a tunnel model 12. The tunnel model 11 is installed inside the model box, which is filled with sand, and the sand is located outside the tunnel model 11. A water inlet 13 is located at the bottom of the model box 11, and the outlet of a constant water head supply pipe 8 is connected to the water inlet. A seepage outlet 14 is located on one side of the model box, and a seepage container 15 is placed at the seepage outlet. Seepage water from inside the tunnel model device flows out through the seepage outlet 14 and is collected by the seepage container 15. A gasket 16 is provided on one side of the bottom of the model box 11, making the model box tilted at the front and higher at the back, with the seepage outlet 14 located on the lower side.

[0024] Specifically, the model box 11 is made of acrylic material and consists of a box body 111 and a box cover 112. The box body 111 is assembled from multiple panels, with adjacent panels fixed together using sealant. The symmetrical side walls of the box body have mounting holes 20. The tunnel model 12 is mounted on these mounting holes at both ends via sealing flanges 17. A sealing ring is installed at the junction of the tunnel model and the mounting hole to prevent water leakage. The box cover 112 has a vent hole 18, which is fitted with a plug 19.

[0025] The method of using the above-mentioned experimental apparatus for studying the variation law of calcium ion content in leaked water is as follows:

[0026] 1) Install the tunnel model device. Place the tunnel model 12 into the box 111 of the model box. The two ends of the tunnel model device are sealed and installed on the box through sealing flanges 17 and sealing rings. Then fill the model box with sand in multiple batches and compact it. Install the box cover at the opening of the box with bolts. The connection between the box cover and the box body is provided with sealing rubber.

[0027] 2) Install the water supply system, fix the water level tank 1 on the lifting device (lifting frame), and install the circulating water supply pipe 7, constant head water supply pipe 8, overflow pipe 9 and circulating water pump 10;

[0028] 3) First, pour water into water tank 1 up to overflow outlet 6, and add about two-thirds of clean water to bucket 2;

[0029] 4) Turn on the circulating water pump 10. Water in the water tank 2 is continuously pumped into the water level tank 1 through the circulating water pump 10. At the same time, open the constant water head water supply pipe valve to transfer water to the tunnel model device until the water overflows from the vent hole 18 of the tank cover. Then, the vent hole 18 is blocked by the plug 19.

[0030] 5) Water is continuously supplied to the water level tank 1 by the circulating water pump 10. Water in the water level tank that exceeds the overflow port 6 is sent back to the water bucket through the overflow pipe 9. The water level tank 1 provides water at a constant pressure to the tunnel model device. Seepage water flows out from the seepage port and is collected by the seepage container.

[0031] 6) Observe the entire test setup for 30 minutes to verify the airtightness of the setup.

[0032] 7) Collect the leaked water in a clean beaker for a fixed period of time every day, test the pH value of the solution, and use a pipette to draw 10 ml of the supernatant into a 200 mL Erlenmeyer flask to test the calcium ion content in the sampled solution.

[0033] 8) Change the water in the acrylic model box daily to ensure that the calcium ion content in the water is at an extremely low level.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An experimental apparatus for studying the variation law of calcium ion content in leaked water, characterized in that: The system includes a tunnel model device and a water supply system. The water supply system includes a water level tank and a water bucket. The water level tank is installed on a lifting device and maintained at a certain height. The water inlet of the water level tank is connected to the water bucket through a circulating water supply pipe. The water outlet of the water level tank is connected to the tunnel model device through a constant head water supply pipe. The tunnel model device is equipped with a seepage outlet. Water in the water bucket is continuously supplied to the water level tank through the circulating water supply pipe. The water level tank provides water at a constant pressure to the tunnel model device through the constant head water supply pipe. Leaking water in the tunnel model device seeps out through the seepage outlet.

2. The experimental apparatus for studying the variation law of calcium ion content in seepage water according to claim 1, characterized in that: The tunnel model device includes a model box and a tunnel model. The tunnel model is installed inside the model box, which is filled with sand. The sand is located outside the tunnel model. A water inlet is provided at the bottom of the model box, and the outlet of a constant water head water supply pipe is connected to the water inlet. A seepage outlet is provided on one side of the model box, and a seepage container is provided at the seepage outlet.

3. The experimental apparatus for studying the variation law of calcium ion content in seepage water according to claim 2, characterized in that: A pad is provided on one side of the bottom of the model box, so that the model box is tilted with the front lower and the back higher, and the water outlet is located on the lower side.

4. The experimental apparatus for studying the variation law of calcium ion content in seepage water according to claim 1, 2, or 3, characterized in that: The water tank is also equipped with an overflow outlet, which is connected to the water bucket via an overflow pipe.

5. The experimental apparatus for studying the variation law of calcium ion content in seepage water according to claim 4, characterized in that: A circulating water pump is installed on the circulating water supply pipe, which transfers the water in the water bucket to the water level tank.

6. The experimental apparatus for studying the variation law of calcium ion content in seepage water according to claim 2, 3, or 5, characterized in that: The model box consists of a box body and a box lid. The box lid is provided with a vent hole, and the vent hole is fitted with a plug.

7. The experimental apparatus for studying the variation law of calcium ion content in seepage water according to claim 6, characterized in that: The box body has mounting holes on its symmetrical side walls. The tunnel model is mounted on the mounting holes at both ends via flanges. A sealing ring is provided at the junction of the tunnel model and the mounting hole to prevent water leakage.

8. The experimental apparatus for studying the variation law of calcium ion content in seepage water according to claim 7, characterized in that: The model box is made of acrylic material, and the box body is composed of multiple panels, which are joined and fixed together with sealant.

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