Test device for simulating karst fissure-pipeline water and solute migration rule

A technology of solute migration and test equipment, applied in the field of test equipment, simulating karst fissure-pipeline water flow and solute migration rules, can solve problems such as single structure, difficult human life, weak operability, etc. The effect of controllable factors, reasonable space layout and strong operability

Pending Publication Date: 2019-07-23
GUIZHOU UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

Traditional hydrogeological methods have certain limitations in the study of the structure, flow characteristics and solute migration laws of karst aquifers. The hydrological cycle process in karst areas is quite complicated. How to comprehensively consider atmospheric rainfall recharge, sinkhole infiltration and surface layer Karst groundwater migration and environmental issues under the joint action of factors such as dispersed infiltration in karst zones, deep fissure zones, and runoff discharge from pipeline networks are still difficult but crucial to human life, production, and national economic development. problems to be solved
Physical tests have been widely used as an important method to study karst water-bearing systems, but the current physical test research on the solute migration and change law of karst fracture-pipeline aqueous media is only for single fractures, simple cross-fissures, and single-fissure-pipe crossings. The research on the law of solute migration has the disadvantages of single structure, incomplete hydrological factors, and weak operability

Method used

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  • Test device for simulating karst fissure-pipeline water and solute migration rule
  • Test device for simulating karst fissure-pipeline water and solute migration rule
  • Test device for simulating karst fissure-pipeline water and solute migration rule

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: as attached Figure 1-7 As shown, a test device for simulating karst fissure-pipeline water flow and solute migration law, it includes a frame 11, the frame 11 is a fixedly connected square frame structure, and a surface karst zone is arranged on the top of the frame 11 The infiltration box 3 is provided with a pressure monitoring device 6 on the side of the frame 11. The surface karst zone infiltration box 3 is a square box structure, and the top of the surface karst zone infiltration box 3 is an open structure and placed The rainfall simulator 2 is connected with a large fissure plate 9 on one side of the bottom of the surface karst zone infiltration box 3, and three small fissure plates 7 are connected on the other side, and the bottom of the small fissure plate 7 is connected with the side of the large fissure plate 9 And it has a V-shaped structure. Large cracks 17 and small cracks 15 are respectively arranged inside the large crack plate 9 and the sm...

Embodiment 2

[0034] Embodiment 2: Karst fissure-pipeline spring flow decline process test procedure

[0035] Set up different water-containing channels, and after controlling the flow at the outlet to be stable, simulate their water-regression processes respectively. The test steps are as follows: ① Open the water valves on all channels to simulate the process of water retreat in the crack-pipeline. ② Turn on the water pump to supply water to the rainfall simulator. ③ Observe the state of the water flow at the outlet, and measure the flow value when the water flow obviously increases to remain basically unchanged. If the results of three consecutive monitorings are basically close, the next test can be carried out. ④ When the outlet flow is stable, turn off the water pump, stop the water supply, and start to simulate the water retreat process. ⑤ Monitor the change process of the flow at the outlet with time, and stop monitoring when the flow at the outlet decreases to basically unchanged...

Embodiment 3

[0036] Example 3: Solute transport test process in crack-pipe unsaturated flow: ① First, a submersible pump is installed in the water supply tank and connected to the water inlet of the rainfall simulator. ② After opening all the water migration channels in the crack-pipe, open the water valve at the water supply pipe of the rainfall simulator to supply water to the rainfall simulator. ③ Monitor the flow at the outlet, and when it reaches a stable level, the tracer can be prepared for the next test. ④ Draw out the pre-prepared carmine solution with a syringe with a volume of 20ml, inject it into the selected tracer injection point instantaneously, and press the timer at the same time to start timing. ⑤ Observe the migration of carmine in the cracks and pipelines. When the carmine is about to reach the exit, start sampling. During the period when the color is getting darker and darker, the sampling is intensive. The time interval is controlled within 3-5s, and the concentration...

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Abstract

The invention discloses a test device for simulating karst fissure-pipeline water and solute migration rule, which comprises a rack, wherein the upper part of the rack is provided with a surface karstzone infiltration tank, and the side of the rack is provided with a pressure monitoring device; the top of the surface karst zone infiltration tank is of an open structure and is provided with a rainfall simulator; one side of the bottom of the surface karst zone infiltration tank is connected with a large fracture plate, and the other side of the bottom of the surface karst zone infiltration tank is connected with three small fracture plates; the bottom ends of the small fracture plates are connected with the side of the large fracture plate and are of a V-shaped structure; the large fracture plate and the small fracture plates are internally provided with a large crack and small cracks; a plurality of pressure measuring pipe joints are arranged on the sides of the large fracture plate and the small fracture plates and at the bottom of the surface karst zone infiltration tank, and are communicated with the pressure monitoring device through hoses. The device has the advantages of complete structure, reasonable spatial layout, high similarity with the characteristics of actual water-containing structure, high operability and controllable influence factors, and is suitable for exploring the karst fissure-pipeline water and solute migration rule.

Description

technical field [0001] The invention relates to a test device, in particular to a test device for simulating karst fissure-pipe water flow and solute migration laws, and belongs to the technical field of hydrogeology and groundwater research. Background technique [0002] Due to the special temporal and spatial changes of karst development, the karst water-bearing medium has strong anisotropy and heterogeneity. The cracks and pipelines developed in the karst area make karst water have characteristics different from groundwater in homogeneous porous media: laminar flow and turbulence. Flow symbiosis, coexistence of pressurized and non-pressurized, local and overall inconsistency of water flow direction, lack of unified regional groundwater level, uneven distribution, etc. There are often engineering water shortages and droughts in karst areas; in major slag, red mud and fly ash stockyards, due to the fragility of the karst geological environment, the increase in stockyard loa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/04
CPCG01N13/04
Inventor 褚学伟张雪梅李云昊丁坚平褚双燕吕子明令狐燕艳张彦召
Owner GUIZHOU UNIV
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