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Apparatus and method for evaluating damage degree of sandy soil under long-term seepage action

A technology of damage degree and sandy soil, which is applied in the field of devices for evaluating the damage degree of sandy soil under the action of long-term seepage, which can solve the problem of no experimental device for the degree of soil seepage damage.

Active Publication Date: 2021-07-30
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a device and method for evaluating the damage degree of sandy soil under long-term seepage action, which can solve the problem that there is no experimental device for the existing test and evaluation of soil seepage damage degree, and has a simple structure and is easy to use

Method used

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  • Apparatus and method for evaluating damage degree of sandy soil under long-term seepage action
  • Apparatus and method for evaluating damage degree of sandy soil under long-term seepage action
  • Apparatus and method for evaluating damage degree of sandy soil under long-term seepage action

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Embodiment 1

[0041] see Figure 1-4 , a device for evaluating the degree of damage to sand and soil under long-term seepage action, which includes a tripod 1, a ring 2 is fixed on the top of the tripod 1, and a pressure chamber is detachably installed on the ring 2; the pressure chamber It includes a cylinder 6, a top cover 3 is fixed on the top of the cylinder 6, and an orifice plate 10 is fixed on the bottom of the cylinder 6; a water inlet 4 is arranged at the center of the top cover 3, and the water inlet 4 passes through a water pipe 18 communicates with the water outlet of the water storage tank 19, the top cavity of the water storage tank 19 is connected with the air compressor 21 through the pressure regulating valve 20, and a collecting device is arranged directly below the pressure chamber. By adopting the above-mentioned device, it can be used for the experiment of evaluating the damage degree of sandy soil under long-term seepage, which can solve the problem that there is no ex...

Embodiment 2

[0052] The method for evaluating the degree of damage to sandy soil under long-term seepage action using any one of the described devices, is characterized in that the method comprises the following steps:

[0053] Step 1: Unscrew the locking nut 7, and open the top cover 3;

[0054] Step 2: Put the prepared soil samples into the cylinder 6 layer by layer to ensure that there is no cavity;

[0055] Step 3: Calculate and determine the initial void ratio and initial compactness index according to the soil sample mass, volume, water content and specific gravity;

[0056] Step 4: Place the round permeable stone 8 on the soil sample;

[0057] Step 5: Put on the top cover 3, and tighten the long bolt 5 through the lock nut 7;

[0058] Step 6: Place the pressure chamber above the collection device, and adjust the distance between the two through the tripod 1;

[0059] Step 7: Fill the box body 12 with water, place it on the balance 15, reset the reading of the balance, and start t...

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Abstract

The invention discloses a device for evaluating the damage degree of sand and soil under long-term seepage action, which includes a tripod, a ring is fixed on the top of the tripod, and a pressure chamber is detachably installed on the ring; the pressure chamber includes a cylinder , the top of the cylinder is fixed with a top cover, and the bottom of the cylinder is fixed with an orifice; the center of the top cover is provided with a water inlet, and the water inlet is connected with the water outlet of the water storage tank through a water pipe. The top cavity of the water storage tank is connected with the air compressor through a pressure regulating valve, and a collection device is arranged directly under the pressure chamber. It can solve the problem that there is no experimental device for testing and evaluating the degree of soil seepage damage in the prior art, and has a simple structure and is convenient to use.

Description

technical field [0001] The invention relates to the field of rock and soil experiments, in particular to a device and method for evaluating the damage degree of sand and soil under long-term seepage action. Background technique [0002] There are nearly 100,000 reservoirs and lakes of various types in my country, and nearly 50,000 rivers. Changes in the water level of lakes and reservoirs have caused countless geological disasters, among which soil structure damage caused by seepage is one of the important inducing causes. The degree of soil seepage damage is mainly affected by internal and external factors. Internal factors mainly include physical and mechanical indicators such as soil composition and gradation, initial compactness Dr, and permeability coefficient k; external factors mainly include seepage pressure and seepage time. Wait. At present, some scholars have tried to carry out qualitative indoor penetration experiments and field testing experiments, but the expe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 陈勇隆海鹏崔宪东苏剑
Owner CHINA THREE GORGES UNIV