KR100729150B1 - Consolidation cell for measuring anisotropy characteristics and apparatus for testing consolidation characteristics with consolidation cell for measuring anisotropy characteristics - Google Patents

Abstract

A consolidation cell for measuring anisotropy characteristics and an apparatus for testing consolidation characteristics with the same are provided to prevent disturbance of a test sample by having a separate socket apparatus for a transducer, and to apply various sizes of transducers. A consolidation cell for measuring anisotropy characteristics includes a porous lower plate, a porous upper plate cover, a consolidation ring(310), a support, and a plurality of transducers(321-329). The porous lower plate contains a test sample, and is formed of a porous plate to drain moisture included in the test sample. The porous upper plate cover covers the test sample, and is formed of the porous plate to drain the moisture included in the test sample. The consolidation ring is arranged between the porous upper plate cover and the porous lower plate to seal the space where the test sample is contained, and does not permeate the moisture of the test sample. The support penetrates the consolidation ring in a vertical direction to the ground, and fixes the consolidation ring to the porous lower plate. The plurality of transducers penetrate between an outer side and an inner side of the consolidation ring, and are arranged to face each other, and measures an acoustic wave passing through the test sample.

Description

Consolidation cell for measuring anisotropy characteristics and Apparatus for testing consolidation characteristics with consolidation cell for measuring anisotropy characteristics}

1 is a structural diagram of a consolidation cell for grasping conventional anisotropic characteristics.

FIG. 2A illustrates an elastic wave traveling while moving particles in a direction perpendicular to the ground.

Figure 2b shows a seismic wave that proceeds while moving the particles in a direction at an angle of 45 degrees to the ground.

FIG. 2C illustrates an elastic wave traveling while moving particles in a direction parallel to the ground. FIG.

3 is a perspective view of a consolidation cell for grasping anisotropy according to an embodiment of the present invention.

4 is a top view of the consolidation cell for grasping the anisotropic characteristic of FIG. 3.

5 is a front view of the consolidation cell for grasping the anisotropic characteristic of FIG. 3.

6 is a manufacturing sample of the consolidation cell for grasping anisotropy according to the present invention.

7 is a structural diagram of a consolidation test apparatus using a consolidation cell for grasping anisotropy according to another embodiment of the present invention.

The present invention relates to a consolidation test, and more particularly, to a consolidation test apparatus using a consolidation cell for grasping anisotropic properties and a consolidation cell for grasping anisotropic properties.

All soils are compressible. That is, the volume decreases when the soil is loaded. At this time, the three elements constituting the soil, namely, soil particles and water among the soil particles, water, and air, are incompressible, so that the volume reduction of the soil results in whether the air occupying the gap between the soil particles is compressed or dissolved in water, or It can be said that water is drained out of the gap. If the soil is completely saturated, compression occurs due to the escape of fluid water. At this time, the compression speed depends on the speed of the water flowing out of the gap, and condensation is the phenomenon that the ground is compressed as water escapes from the soil over a long time.

When constructing structures in the field of civil engineering, especially in geotechnical engineering, structures are often placed on soft ground. In this case, soft ground mainly refers to cohesive soil, and if the structure is constructed directly on the ground, overlying or floating settlement that exceeds the allowable settlement in the long term will have an adverse effect on the structure and eventually cause the structure to collapse. Let's go. Therefore, in order to construct a structure on such ground, improvement of the ground must be preceded first.

For the improvement of the ground, first, the compressive characteristics of clay soil are investigated through field or indoor experiments. The test conducted in the laboratory is the consolidation test and is one of the most widely conducted tests in the field of geotechnical engineering.

Through the consolidation test, the consolidation constants (compression index, preceding consolidation load, volume compression coefficient, consolidation coefficient) can be obtained. Using this consolidation constant, the sedimentation characteristics (sedimentation rate, settlement rate) generated when the viscous soil is subjected to one-dimensional compaction can be identified.

When constructing structures such as road embankments on soft ground, it is necessary to estimate the final settlement due to consolidation and the time it takes for the settlement to take place, for example 50% or 90%. This calculation is required when determining the height of the fill or the construction period. The consolidation characteristics of the soil are also used for the design of soft ground treatments such as preloading, sand drain or paper drain.

Acoustic wave velocity is influenced by the characteristics of a medium through which waves are transmitted, and various techniques have been developed to identify characteristics or states inside an object using elastic waves in various fields. Geotechnical geotechnical works have also developed and used geotechnical exploration methods to minimize the effects of unmeasurable or disturbances.

One of the many characteristics that can be determined from the seismic velocity is that it is possible to determine the material effective stress that the medium is subjected to. The relationship between the elastic wave velocity and the effective stress is affected by the effective stress in the direction in which the elastic wave proceeds and the direction in which the particles in the medium move through the elastic wave. In particular, when the wave propagation direction and the direction of motion of the medium particles are perpendicular to each other, such as shear waves, the anisotropic characteristics of the target medium can be grasped.

1 is a structural diagram of a consolidation cell for grasping conventional anisotropic characteristics.

In the conventional consolidation test and shear wave velocity measurement test, as shown in FIG. 1, the correlation between the shear wave velocity and the effective stress was estimated while varying the direction of wave travel from top to bottom or from side to side.

However, the factors that determine the relationship between the shear wave velocity and the effective stress are influenced not only by the wave propagation direction and the medium particle movement direction, but also by the anisotropy due to the structural properties and particle arrangement of the particles.

Therefore, the conventional consolidation cell for grasping the anisotropy has a problem that the correlation between the shear wave velocity and the effective stress is not clearly identified through a test.

The first technical problem to be achieved by the present invention is to measure the shear wave velocity according to the shaking direction of the sample particles in the consolidation test process to determine the anisotropic characteristics of the sample due to consolidation, and the sample is disturbed by providing a separate socket device for the transducer The present invention provides a consolidation cell for anisotropic characteristics that can be prevented, transducers of various sizes can be applied, and the correlation between shear wave velocity and effective stress can be clearly identified.

The second technical problem to be achieved by the present invention is to provide a consolidation test apparatus using a consolidation cell for grasping the anisotropic characteristic.

In order to achieve the first technical problem, the present invention is a porous lower plate that can contain a sample, and is composed of a porous plate to drain the moisture contained in the sample, covering the sample, and comprises a porous plate contained in the sample Porous top cover for draining the water, disposed in the lateral direction between the porous top plate and the lower lower plate to seal the space containing the sample, the consolidation ring that the moisture of the sample is not permeable, the direction perpendicular to the ground surface Through the consolidation ring and the support for fixing the consolidation ring to the lower plate and the through and between the outside and the inside of the porous consolidation ring, are arranged in a form facing each other, the shaking direction is arranged differently for measuring the anisotropy of the ground Anisotropic characteristics grasp comprising a plurality of transducers measuring the velocity of the acoustic wave passing through the sample. It provides a consolidation cell for.

In order to achieve the second technical problem of the present invention, the present invention can contain a sample, consisting of a porous plate to drain the moisture contained in the sample, the lower plate covering the sample, consisting of the porous plate contained in the sample Porous top cover for draining moisture, a loading bar for pressing the porous top cover at a predetermined pressure, disposed in the lateral direction between the porous top cover and the porous bottom plate to seal the space containing the sample, the moisture of the sample is permeable Unconsolidated consolidation ring, a support for penetrating the consolidation ring in a direction perpendicular to the ground surface and fixing the consolidation ring to the lower plate, penetrating between the outside and the inner side of the consolidation ring and facing each other, For the measurement of the anisotropy of the ground, the vibration direction is arranged differently so that the velocity of the acoustic wave passing through It provides a consolidation test apparatus using the compaction cell for identifying anisotropic characteristics including a distance measurement that measures the distance between the measuring transducer and a plurality of the porous lower plate and a perforated top cover that.

Consolidation is the removal of water and air from the gaps in the soil. On the other hand, compaction differs from consolidation in that only air in the gap is removed. All soils are compressible. That is, sinking occurs when a load is applied. When pressure is applied to the soil, an immediate settlement occurs and a primary consolidation settlement occurs, which reduces the volume of the soil. After primary consolidation, secondary consolidation settlement occurs due to plastic alignment of soil structure. It is a function that depends on the time of the second consolidation, whereas the primary consolidation is determined by the exit of the water and air from the gap. Therefore, the second consolidation takes a long time.

The basic principle of consolidation is that when the saturated soil layer receives additional stress, the pore water pressure in the soil increases by the additional stress. This is called excess pore water pressure. In addition, dissipation of excess pore water pressure occurs. Since clay has a smaller permeability coefficient than sandy soils, dissipation of pore water gradually dissipates over a long period of time. When the pore water dissipates, the effective stress increases in the soil at any depth, and a second consolidation settlement occurs under this constant effective stress.

와 같으며, 이에 따라 배수거리를 짧게 하면 연약지반의 압밀침하 시간을 단축할 수 있다는 것을 알 수 있으며, 드레인재의 특성에 따라서도 압밀침하 시간이 크게 달라지게 된다.On the other hand, according to Terzaghi's first consolidation theory, the relationship between the time (t) and the maximum drainage distance (H) required to consolidate the soft ground is

As such, if the drainage distance is shortened, it can be seen that the consolidation settlement time of the soft ground can be shortened, and the consolidation settlement time greatly varies depending on the characteristics of the drain material.

The seismic detection method is an exploration method that measures the propagation speed of an acoustic wave due to the difference in elasticity of rocks and minerals and analyzes it.

Refraction method The seismic detection method is applied when critical refraction occurs in the propagation process of seismic waves. Waves incident at critical angles on the lower layer having high velocity are refracted parallel to the boundary of the layer and propagated at the velocity of the lower layer. Uses include the existence of shadowed zones and the discovery of discontinuities, the exploration of rock salt domes, which are oil-rich areas, the basic survey for the installation of large structures such as dam roads, preliminary geological surveys in undeveloped areas, and groundwater and mineral exploration.

Reflective seismic surveys are used for underground sedimentary investigations and are widely used for offshore oil exploration. The side length of the reflex method is enough to be a fraction of the depth of irradiation, and it is superior to the refraction method for exploring complex multilayer structures in detail. Depths of investigation range from hundreds to thousands of meters, and exploration of the microscopic structure of the earth's crust does not matter, even if several discontinuities exist.

When an external force is applied to the object, the object is deformed. When the external force is removed, the property of returning to the original state is called elasticity of the material. Elasticity is used to obtain underground information because of the difference in transmission speed depending on the object (type of rock). Since the force acting on a unit area is called stress, Hook's law that elastic strain reflects stress is called elastic material.

When an object is impacted, its wavelength is transmitted to the object, which is called a seismic wave. Acoustic waves are classified into longitudinal waves, shear waves, and surface waves. The longitudinal wave is called the fastest P wave (prinary wave) among the seismic waves, and the propagation speed is shown in Equation 1 below.

Where R is the volume elastic flow, ρ is the density, and μ is the stiffness.

Shear waves are called S wave (secondary wave) and the propagation speed is given by the elastic modulus of the medium. The propagation speed of the S wave is shown in Equation 2 below.

Surface waves propagate with energy concentrated on a surface or interface and are divided into Rayleigh waves and love waves. The velocity of seismic wave propagation in rock depends on the quality of the rock.

Seismic waves are refracted when they reach the interface between layers with different propagation velocities and densities, which represent qualitative differences in rock. The reflection method is suitable for shallow exploration, and the difficulty of discontinuity analysis is large.

Seismic waves can be calculated by using the relationship between the distance from the point of occurrence and the time of arrival of the seismic wave by measuring the time it takes for the seismic wave to reach the wave wave, that is, the transducer. . The seismic distinction is apparent from 3.5 to 5.5 km / sec in granite, while the seismic velocity in clay and sand is 0.5 to 1.5 km / sec.

Anisotropy means other properties along the direction of mechanical properties such as uniaxiality, water permeability, strength and the like. It is called intrinsic anisotropy or initial anisotropy due to the arrangement of crystals in the rock or an arrangement structure occurring in the deposition of soil, and it is called anisotropy or stress anisotropy which causes acquired anisotropy resulting from stress history or the like.

Permeability coefficient, soil is largely composed of solid particles, air (air) and water (water). At this time, the space excluding the soil particles is called a gap. When water flows into the soil, it flows through the gap. Therefore, the soil with large gap makes the water flow better than the soil with small gap. The water flow capacity in the soil is called the permeability coefficient. For example, sand and gravel with large gaps have greater water flow capacity than clay with small gaps. In other words, the permeability coefficient of sand is greater than that of clay.

Horizontal Permeability and Vertical Permeability, Soil is anisotropic (Anisotropy) structure. It means that the characteristics of the soil are different depending on the direction, which means that the properties of the soil are changed in the horizontal and vertical directions according to the sedimentary environment, electrical and chemical properties. When water flows from top to bottom, the ability to transfer water is called the vertical pitch coefficient, and when water flows from left to right, it is called the horizontal pitch coefficient. Therefore, it is common that the horizontal permeability coefficient and the vertical permeability coefficient do not coincide with each other, and in most cases, the horizontal permeability coefficient is larger than the vertical permeability coefficient.

Hereinafter, with reference to the drawings will be described a preferred embodiment of the present invention. However, embodiments of the present invention illustrated below may be modified in many different forms, and the scope of the present invention is not limited to the embodiments described below.

FIG. 2A illustrates an elastic wave traveling while moving particles in a direction perpendicular to the ground.

Equation 3 below represents the velocity of the shear wave traveling while moving the particles in a direction perpendicular to the ground.

Figure 2b shows a seismic wave that proceeds while moving the particles in a direction at an angle of 45 degrees to the ground.

Equation 4 below represents the velocity of the shear wave traveling while moving the particles in a direction at an angle of 45 degrees to the ground.

FIG. 2C illustrates an elastic wave traveling while moving particles in a direction parallel to the ground. FIG.

Equation 5 below represents the velocity of the shear wave traveling while moving the particles in a direction parallel to the ground.

이고,

는 수평방향의 유효응력,

는 연직방향의 유효응력을 나타낸다.

는 0보다 크고, 1보다 작거나 같은 실수이다. αHV, α45, αHH는 각각 수직, 45도, 수평인 경우의 상수이다. 또한, βHV, β45, βHH는 각각 수직, 45도, 수평인 경우의 상수이다.In Equation 3, 4, 5,

ego,

Is the effective stress in the horizontal direction,

Denotes the effective stress in the vertical direction.

Is a real number greater than 0 and less than or equal to 1. (alpha) HV, (alpha) 45, (alpha) HH are constant in the case of vertical, 45 degree | times, and horizontal, respectively. In addition, (beta) HV, (beta) 45, (beta) HH are constant in the case of vertical, 45 degree | times, and horizontal, respectively.

3 is a perspective view of a consolidation cell for grasping anisotropy according to an embodiment of the present invention.

The consolidation cell for determining anisotropic characteristics according to an embodiment of the present invention includes a porous upper plate cover 705 and a porous lower plate 706.

The porous top plate cover 705 covers the sample and is composed of the porous plate to drain the water contained in the sample. The porous lower plate 706 may contain a sample and consist of a porous plate to drain moisture contained in the sample. Preferably, the porous upper plate cover 705 and the porous lower plate 706 may be made of a predetermined porous metal.

The consolidation ring 310 is disposed in the lateral direction between the porous upper plate cover 705 and the porous lower plate 706 to seal the space in which the sample is contained, and is manufactured in a structure in which moisture of the sample is not permeable. Preferably, the consolidation ring 310 may be manufactured by molding a brass plate.

Preferably, the consolidation ring 310 may be configured to measure the degree of falling of the porous top plate cover 705 including a graduation engraved intaglio on the inner surface in contact with the sample.

The support 330 penetrates the consolidation ring 310 in a direction perpendicular to the ground surface to fix the consolidation ring 310 to the porous lower plate 706 or the ground surface.

The plurality of transducers 321-329 penetrate between the outside and the inside of the porous consolidation ring and are disposed to face each other. The plurality of transducers 321-329 are arranged in different shaking directions to measure the anisotropy of the ground to measure the velocity of the acoustic wave passing through the sample. That is, the plurality of transducers 321-329 serve to propagate an elastic wave in one of the transducers facing each other, and the other transducer serves to receive the elastic wave passing through the sample. The vibration direction of the plurality of transducers 321-329 means a direction orthogonal to the direction of the steel plate marked in black, and the direction in which the particles move as the seismic wave progresses.

Preferably, the plurality of transducers 321-329 have a structure in which steel sheets are stacked between a pair of piezoelectric plates, and when different electrodes are applied to the pair of piezoelectric plates, the plurality of transducers 321-329 correspond to voltage differences between the pair of piezoelectric plates. The device may propagate an input wave having a wavelength.

In this case, the plurality of transducers 321-329 are disposed at different angles to the steel plate in a direction perpendicular to the ground so that the movement direction of the sample particles according to the input wave is different from each other.

Preferably, the plurality of transducers 321-329 may be coupled together with an O-ring made of rubber to a socket for a transducer installed in the consolidation ring.

Preferably, the plurality of transducers 321-329 may be connected to a sample on one side of the transducers 321-329, and the other side of the transducers 321-329 may be connected to a circuit for measuring acoustic waves. In this case, the circuit for measuring acoustic waves 770-790 may include a signal generator 780 for generating a predetermined input wave and a speed calculator 790 for receiving an input wave passing through the sample and measuring the speed of the elastic wave. have.

4 is a top view of the consolidation cell for grasping the anisotropic characteristic of FIG. 3.

The consolidation ring 310 is disposed in the lateral direction between the porous upper plate cover 705 and the porous lower plate 706 to seal the space in which the sample is contained, and is manufactured in a structure in which moisture of the sample is not permeable. Preferably, the consolidation ring 310 may be manufactured by molding a brass plate.

The transducer 320 penetrates between the outer side and the inner side of the porous consolidation ring and is disposed to face each other. The transducer 320 measures the speed of the acoustic wave passing through the sample because the shaking directions are different from each other to measure the anisotropy of the ground.

The support 330 penetrates the consolidation ring 310 in a direction perpendicular to the ground surface to fix the consolidation ring 310 to the porous lower plate 706 or the ground surface. Preferably, the support 330 may be bolted.

5 is a front view of the consolidation cell for grasping the anisotropic characteristic of FIG. 3.

The plurality of transducers 321-325 penetrate between the outside and the inside of the porous consolidation ring and are disposed to face each other. The plurality of transducers 321-325 are arranged in different shaking directions to measure the anisotropy of the ground to measure the velocity of the acoustic wave passing through the sample. In FIG. 5, the angles formed by the steel plates marked with black in the plurality of transducers 321-325 and the ground differ from 90 degrees, 60 degrees, 45 degrees, 30 degrees, and 0 degrees.

That is, in the present invention, not only the propagation direction of the elastic wave, but also the elastic wave velocity is measured while changing the direction of motion of the medium. In addition, in the present invention, it is possible to accurately grasp the anisotropic characteristic that changes during the consolidation test process.

6 is a manufacturing sample of the consolidation cell for grasping anisotropy according to the present invention.

The fabrication sample of Figure 6 has a socket for the transducer on its side. Transducer sockets are bolted and fixed. When securing the transducer to the socket for the transducer, it can be fixed together with a rubber O-ring.

7 is a structural diagram of a consolidation test apparatus using a consolidation cell for grasping anisotropy according to another embodiment of the present invention.

The porous lower plate 706 may contain a sample and consist of a porous plate to drain moisture contained in the sample.

The porous top plate cover 705 covers the sample and is composed of the porous plate to drain the water contained in the sample.

The loading bar 740 presses the porous top plate cover at a predetermined pressure. Preferably, the preset pressure may be a pressure set using the weight 741 installed in the loading bar 740. Preferably, the preset pressure may be set by causing the loading bar 740 to force downward through other pressure applying means.

The consolidation ring 710 is disposed in the lateral direction between the porous upper plate cover 705 and the porous lower plate 706 to seal the space in which the sample is contained, and is manufactured to have a structure in which moisture of the sample is not permeable.

Preferably, the consolidation test apparatus using a consolidation cell for determining anisotropy characteristics according to another embodiment of the present invention through the consolidation ring 710 in a direction perpendicular to the ground through the consolidation ring 720 to the porous lower plate 706 Or it may include a support 330 fixed to the ground.

The plurality of transducers 721-726 penetrate between the outer and inner sides of the porous consolidation ring and face each other, and have different vibration directions for measuring the anisotropy of the ground, so that the velocity of the acoustic wave passing through the sample is increased. Measure Preferably, the plurality of transducers 721-726 have a structure in which steel sheets are stacked between a pair of piezoelectric plates, and when different electrodes are applied to the pair of piezoelectric plates, the plurality of transducers 721-726 correspond to a voltage difference between the pair of piezoelectric plates. The device may propagate an input wave having a wavelength. In this case, the plurality of transducers 721-726 are arranged at different angles to the steel plate in a direction perpendicular to the ground so that the movement direction of the sample particles according to the input wave is different from each other.

The distance measuring unit 760 measures the distance between the porous lower plate 706 and the porous upper plate cover 705.

The distance measuring unit 760 measures the distance between the lower plate and the upper plate cover, as shown in FIG. 7, a method of displaying a ruler, a method of displaying a gauge scale, and electronically detecting the position of the loading bar 740 with a sensor. It can be a way to.

The controller 770 starts or stops generating the input wave of the signal generator 780 according to a control signal input by the user.

Preferably, the controller 770 may select a transducer for propagating an input wave among a plurality of transducers, and generate a control signal for generating an input wave of any one of a sine wave, a square wave, and an impulse.

The signal generator 780 generates a predetermined input wave. Preferably, the signal generator 972 may generate an input wave of any one of a sine wave, a square wave, and an impulse according to the control signal.

Preferably, the consolidation test apparatus using the consolidation cell for determining the anisotropy characteristics according to another embodiment of the present invention includes a filter 973 for removing noise from the acoustic waves received by the plurality of transducers (721-726). can do.

Preferably, the consolidation test apparatus using the consolidation cell for determining the anisotropy characteristics according to another embodiment of the present invention is a predetermined equation from the signal from which the noise is removed from the acoustic waves received by the plurality of transducers (721-726) The speed calculation unit 790 may be used to calculate the speed of the acoustic wave and output the calculation result.

Preferably, the consolidation test apparatus using a consolidation cell for determining the anisotropy characteristics according to another embodiment of the present invention is a pressure sensor for measuring the pressure applied by the loading bar 740, measuring the amount of displacement per hour of the loading bar 740 It can be configured as a system including a means, and the computer can analyze the measured pressure and the displacement amount per hour by computer to determine the consolidation characteristics.

In order to analyze the consolidation characteristics using the consolidation test apparatus using the consolidation test device for determining anisotropic characteristics according to another embodiment of the present invention, first, pressurized inside the housing consisting of the consolidation ring 710 and the porous lower plate 706 You can join the numbers. The reason for pressurizing the pressurized water is to remove the air by dissolving the fine air bubbles contained in the sample with the pressurized water. When the load is applied to the loading bar 740, the sample is compressed and the water contained in the sample is drained through the consolidation ring 710. When a load is applied while pressing the loading bar 740 at a constant speed, a deformation of the sample occurs at a constant speed. At this time, the stress of the upper part of the sample, the pore water pressure and the displacement of the lower part, etc. may be measured and analyzed.

According to the present invention, by mounting a large amount of shear wave velocity measurement equipment to determine the anisotropy characteristics in the consolidation test and shear wave measurement test equipment, it is possible to measure the seismic wave speed for each particle motion direction by varying the direction of the shear wave measurement transducer.

According to the present invention, a consolidation ring for installing a large amount of acoustic wave velocity measuring transducer is manufactured, and the transducer is symmetrically disposed to maintain a constant distance between the source and the receiver. The present invention may further include a rubber O-ring to prevent direct contact between the waterproof and metal inserter and the test apparatus.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary and will be understood by those of ordinary skill in the art that various modifications and variations can be made therefrom. However, such modifications should be considered to be within the technical protection scope of the present invention. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

As described above, according to the present invention, it is possible to determine the anisotropic characteristics of the sample due to consolidation by measuring the shear wave velocity along the shaking direction of the sample particles in the consolidation test process, and the sample is provided with a separate socket device for the transducer. Disturbance can be prevented, transducers of various sizes can be applied, and the correlation between shear wave velocity and effective stress can be clearly identified.

Claims (12)

A porous lower plate which can hold a sample and consists of a porous plate to drain moisture contained in the sample; A porous top plate cover covering the sample, the porous top plate configured to drain the moisture contained in the sample; A consolidation ring disposed in the lateral direction between the porous upper plate cover and the lower lower plate to seal the space in which the sample is contained, and not to permeate the moisture of the sample; A support for penetrating the consolidation ring in a direction perpendicular to the ground surface to fix the consolidation ring to the porous lower plate; And A plurality of transducers penetrating between the outer and inner sides of the porous consolidation ring and disposed to face each other, and having different shaking directions for measuring the anisotropy of the ground to measure the velocity of the acoustic wave passing through the sample. Consolidation cell for grasping anisotropic properties. The method of claim 1, The plurality of transducers A structure in which steel sheets are stacked between a pair of piezoelectric plates, and when a different electrode is applied to the pair of piezoelectric plates, the device propagates an input wave having a wavelength corresponding to the voltage difference between the pair of piezoelectric plates. Consolidation cell for grasping anisotropic characteristics. The method of claim 2, The plurality of transducers Consolidation cell for grasping anisotropy, characterized in that the angle perpendicular to the ground is different from the steel plate so that the movement direction of the sample particles according to the input wave are different from each other. The method of claim 1, The plurality of transducers Coupled with a rubber O-ring to the transducer socket installed in the consolidation ring, one side of the transducer is in contact with the sample, the other side of the transducer is connected to the circuit for measuring acoustic waves Consolidation cell for grasping anisotropic characteristics, characterized in that the. The method of claim 4, wherein The circuit for measuring acoustic waves A signal generator for generating a predetermined input wave; And Consolidation cell for grasping the anisotropy characterized in that it comprises a speed calculating unit for receiving the input wave passed through the sample to measure the speed of the elastic wave. The method of claim 1, The porous upper plate cover and the porous lower plate Consolidation cell for grasping anisotropic properties, characterized in that made of a predetermined porous metal. The method of claim 1, The consolidation is Consolidation cell for grasping anisotropic characteristics, characterized in that the brass plate is manufactured by molding. A porous lower plate which can hold a sample and consists of a porous plate to drain moisture contained in the sample; A porous top plate cover covering the sample, the porous top plate configured to drain the moisture contained in the sample; A loading bar for pressing the porous top cover at a predetermined pressure; A consolidation ring disposed in the lateral direction between the porous upper plate cover and the lower lower plate to seal the space in which the sample is contained, and not to permeate the moisture of the sample; A support for penetrating the consolidation ring in a direction perpendicular to the ground surface to fix the consolidation ring to the porous lower plate; A plurality of transducers penetrating between the outer and the inner side of the porous consolidation ring, disposed in a form facing each other, the vibration direction is arranged differently for measuring the anisotropy of the ground to measure the velocity of the acoustic wave passing through the sample ; And Consolidation test apparatus using a consolidation cell for anisotropic characteristic grasp comprising a distance measuring unit for measuring the distance between the porous lower plate and the porous upper plate cover. The method of claim 8, The plurality of transducers A structure in which steel sheets are stacked between a pair of piezoelectric plates, and when a different electrode is applied to the pair of piezoelectric plates, the device propagates an input wave having a wavelength corresponding to the voltage difference between the pair of piezoelectric plates. Consolidation test apparatus using a consolidation cell for grasping anisotropic characteristics. The method of claim 9, The plurality of transducers Consolidation test apparatus using a consolidation cell for grasping anisotropy, characterized in that the angle perpendicular to the ground is formed different from each other so that the direction of movement of the sample particles according to the input wave are different from each other. The method of claim 8, A control unit for selecting a transducer for propagating an input wave among the plurality of transducers according to a user input and generating a control signal for generating any one of a sinusoidal wave, a square wave, or an impulse; And A consolidation test apparatus using a consolidation cell for anisotropy determination, characterized in that it further comprises a signal generator for generating any one of the input wave of the sine wave, square wave or impulse in accordance with the control signal. The method of claim 8, A filter for removing noise from the acoustic waves received by the plurality of transducers; And Consolidation test apparatus using a consolidation cell for grasping anisotropy, characterized in that it further comprises a speed calculating unit for calculating the speed of the acoustic wave from a signal from which the noise is removed using a predetermined equation and outputting a result of the calculation.

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