SU684099A1 - Method of investigating stability of soil to washout - Google Patents

Description

(54) METHOD OF STUDYING GRUIT.L STABILITY

TO SMASH

one

The invention relates to the field of chemical research and may be used to study the soils of the channel stream.

There is a known method for determining the limiting stability of particles under the influence of a flow, including visual observation and detection of various stages of the behavior of soil particles in the channel flow 1.

Closest to the proposed invention is a method for studying soil erosion with liquid iKjTOKOM, which includes the difference in the indicator soil, the soil volume with the water flow indicator, and the wash height registration when the flow rate 2 changes.

The disadvantage of these methods is low measurement accuracy.

The purpose of the present invention is to improve the accuracy and define the boundaries of the static and dynamic state of the soil.

This is achieved by the fact that in the method of investigating the resistance of the soil to erosion, including 1, the emissivity of the indicator in the soil, the erosion of the soil with indicator flux

water, the state of soil resistance to erosion as the flow velocity changes, a layer of metallized soil particles is placed in the soil as an indicator, and during the erosion process electric current is passed through this layer to measure the resistance of the soil to erosion.

FIG. Figure 1 shows an example of the implementation of the device implementing this method.

Part of the soil being studied is prepared, for example, for experimenting by means of meta-actisation of the surface quality of its grains. At this, the physical and mechanical properties of the soil do not practically change. At the bottom of the hydraulic chute 1, the test soil 2 is placed, the surface layer of which is formed by metallized particles 3. Between the layers of particles 2 and 3, current-conducting electrodes 4 are placed in the soil, through which current is passed, defined by resistance

Claims (2)

a layer of metallized soil 3, a load resistor 5 and the applied voltage. During the test, the flow rate of water in the tray is changed and the ypoiienh noise on the resistor 5 e according to the voltmeter 6 is measured. The current in the circuit is measured by an ammeter 7. In the absence of fluid movement and tray I in the circuit of the electrodes 4, the current determined by point coitacals between meta-sized ground particles in layer 3. At the same time, electrical noise recorded by resistor 5 is practically absent. This noise level will remain until those no | i until the flow rates increase to values, when KOTojiiiix particles, disposed 1) 1 1 1 surface and layer 3 begin to combine oscillatory movements, causing a sharp increase in the noise level recorded by an integrated voltmeter 6 . llpii distant uvs. schchenin speed of the notok of k. nchetvo. 1kayem1, in ko. e6at.le1e dvnezhei metal metal chzioaiiii ch1; itz) aste1 m cooTiieTstvenio grows y) noise reduction. 11 1) ве и и и и от отдельных отдельных отдельных:: u u и ос и т т т т т т и и и и 1, е и)) ру ру ру ру ру ру через сос сос сос н н ру через через через сос н current in value p. u.meshatsats. The graph of the inception of the level of the Vm and the current in nein versus the velocity of the current V is shown in FIG. 2, where: Vi is the flow rate at which it has a place in the vicinity of the ground and the stability of rpyirra particles at the bottom; i is the velocity of the notoka, in which there is a state of non-realizable dynamic stability of soil particles at the bottom; 3 - iK (.ipocTb of the sock, which causes the breakdown of all metallized 11H1) 1x particles of soil. The technical effect of the application of the research method consists in the possibility of a deeper and more accurate assessment of the stability of the soil being eroded. By the nature of the curves of the noise level versus the velocity of the notok, it is possible to determine the state of the maximum static and dynamic stability of the soil being eroded. The invention of the method of studying soil resistance to erosion, including the location of the indicator in the soil, erosion of the soil with the indicator, water flow, registration of the soil resistance to erosion conditions with a change in the flow velocity, characterized in that static and dynamic stability of the soil; a layer of metalized soil particles is placed in it as an indicator; in the process of erosion, an electric current is passed through this layer and its parameters are determined by group resistance to erosion. Sources of information taken into account at the examination 1. Mirtskhulava, Ts. E. The erosion of the channels and the method of assessing their sustainability, M., “Ko / us, 1967, p. 8-14. 2.Mass, E.I., et al. Application of optical fibers in the study of channel processes, Tashkeit, 1974, p. 577-581. Uui V, Af / ce