JP2015141192A - Container for storing buried environmental member model for evaluating behavior of buried environmental field of underground isolation member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container for storing a buried environmental member model for evaluating behavior of a buried environmental field of an underground isolation member including affection of surrounding rocks.SOLUTION: A container 12 has a container body 32 for storing a sample, and is configured so that: a non-contact displacement gauge 24 detects displacement of an underground isolation member 21; an earth pressure gauge 25 detects a swelling state of a buffer material 22; a strain sensor detects displacement of a rock member 23; and the container body 32 is disposed at a predetermined place, so that the behaviors of the underground isolation member 21, buffer material 22, and rock member 23 are evaluated.

Description

  The present invention relates to a container that accommodates a buried environment member model for evaluating the behavior of a buried environment field of a ground isolation member such as waste.

  Disposal facilities that bury radioactive waste in bedrock deep underground are known. In a facility where radioactive waste is buried and buried, the radioactive waste is sealed in a container as a ground isolation member, and the ground isolation member is buried in a bedrock several hundred meters underground.

  The underground isolation member is a bentonite-based material, for example, a bentonite buffer material or a bentonite, in which radioactive waste is sealed in the containment vessel and a poorly permeable layer is constructed around the containment vessel. The storage container is wrapped with a cushioning material in which sand and sand are mixed (for example, Patent Document 1).

  The ground isolation member is affected by combined phenomena of heat, water, and stress, such as deformation of buffer material and rock mass due to heat generation of waste, influence of groundwater, deformation of rock mass due to earth pressure, etc. For this reason, the underground environment of the underground isolation member changes due to isolation for many years.

  In order to stably embed underground isolation members over a long period of time, the effects of the interaction of heat, water, and stress are taken into account, and the behavior of the underground isolation member is evaluated by evaluating the embedded environment for a considerable period of time. There is a need to. In this case, the embedded environment will be evaluated including the influence of the surrounding rock mass, but the embedded environment will be evaluated including the influence of the surrounding rock mass and the behavior of the buried environment field of the underground isolation member will be evaluated. The technology is not established yet.

JP 2003-211113 A

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a container that accommodates a buried environment member model for evaluating the behavior of a buried environment field of a ground isolation member including the influence of surrounding rocks. And

  In order to achieve the above object, according to the first aspect of the present invention, the container for storing the buried environment member model for evaluating the behavior of the buried environment field of the underground isolation member according to the present invention has a buffer material around the underground isolation member. A container body for accommodating a buried environmental member model in which a rock member is disposed around, and a container body in which the buried environment member model is housed in a state where the periphery is covered, and provided in the container body First displacement detection means for detecting the displacement of the ground isolation member, swelling detection means for detecting the swelling state of the buffer material provided in the container body, and second displacement detection for detecting the displacement of the rock member. Means, a one-way pressurizing unit that pressurizes the embedded environmental member model in one direction, an other-direction pressurizing unit that pressurizes the embedded environmental member model in a direction crossing the one direction, and the embedded environmental member model. Provided with water flow means for carrying out water And features.

  According to the first aspect of the present invention, a cushioning material is disposed around the ground isolation member, a rock member is disposed around, the embedded environmental member model is accommodated in the container body, and the container body is disposed at a predetermined place. Then, the behavior of the underground isolation member, the buffer material, and the rock mass member is evaluated. The displacement of the ground isolation member is detected by the first displacement detection means, the swelling state of the buffer material is detected by the swelling detection means, and the displacement of the rock member is detected by the second displacement detection means.

  Thereby, it can be set as the container which accommodates the buried environment member model for performing the behavior evaluation of the buried environment field of the underground isolation member including the influence of the surrounding rock.

  And the container which accommodates the buried environment member model for performing the behavioral evaluation of the buried environment field of the underground isolation member of the present invention according to claim 2 is the buried environment field of the underground isolation member according to claim 1. In the container for storing the buried environment member model for performing behavior evaluation, the first displacement detecting means is a non-contact displacement means for detecting the displacement of the underground isolation member in a non-contact manner through the cavity of the buffer material. The swelling detection means is a pressure detection means for detecting the swelling state of the buffer material by detecting the pressure of the buffer material, and the second displacement detection means is attached to the rock member and detects strain. Strain detecting means, and the one-way pressurizing means is a piston that is driven by fluid pressure to press the embedded environment member model to one side, and the other-direction pressurizing means is the piston of the embedded environment member model Pair in one direction Characterized in that it is a fluid chamber formed through the elastic film material around a direction crossing Te.

  In the present invention according to claim 2, the displacement of the ground isolation member is detected by the non-contact displacement meter, the swelling state of the buffer material is detected by the pressure detection means, and embedded by supplying the fluid to the piston and the fluid chamber The environmental member model can be pressurized in three axial directions.

  In addition, a container for storing a buried environment member model for evaluating the behavior of the buried environment field of the underground isolation member according to claim 3 of the buried environment field of the underground isolation member according to claim 2 is provided. In the container for storing the embedded environment member model for performing behavior evaluation, the underground isolation member in the embedded environment member model is cylindrical, and a plurality of buffer members are provided in the axial direction around the underground isolation member. It is a ring-shaped bentonite-based member arranged in a stacked manner, and the rock member is a cylindrical rock member arranged around a plurality of laminated bentonite-based members, The embedded environment member model is accommodated in the container main body with the axial direction being one direction, and the container main body includes a gantry member on which one surface of the end surface portion of the cylindrical embedded environment member model is supported, and a gantry member It is arranged on the upper surface of the cylinder A cylindrical surface of the embedded environment member model is disposed on an outer cylinder frame body held via a gap serving as the fluid chamber of the other-direction pressurizing unit, and an upper side of the outer cylinder frame body, and the embedded environment An upper lid member that supports the other surface of the end surface portion of the member model, and the piston of the one-way pressurizing means is between the upper surface of the gantry member and one surface of the end surface portion of the embedded environment member model. A pressure water supply means for supplying pressure water for driving the piston to generate an axial pressure on the buried environment member model, and the fluid of the other direction pressurization means. Restricted pressure water supply means for supplying pressurized water to the chamber is provided, and the non-contact displacement means and the pressure detection means are held by the upper lid member.

  According to the third aspect of the present invention, the cylindrical embedded environment member model is accommodated, the pressurized water is supplied by the pressurized water supply means and the piston is driven to generate the axial force on the embedded environment member model and Pressure water is supplied to the fluid chamber by a pressurized water supplier to restrain the embedded environment member model from the surroundings, and pressurize the embedded environment member model in three axial directions.

  The container containing the buried environment member model for evaluating the behavior of the buried environment field of the underground isolation member of the present invention is for evaluating the behavior of the buried environment field of the buried isolation member including the influence of the surrounding rock mass. It becomes possible to set it as the container which accommodates the buried environment member model.

It is a schematic side view showing the whole structure of the behavior evaluation apparatus of the underground environment field of the underground isolation member using the container which concerns on one Example of this invention. It is an external view of the sample which is a buried environment member model. It is a partially broken external view of the sample which is an embedded environment member model. It is a sectional side view of the container which concerns on one Example of this invention. It is a plane sectional view of the container concerning one example of the present invention. It is a graph showing the time-dependent change of a displacement.

  The behavior evaluation device for the buried environment field of the underground isolation member using the container for storing the buried environment member model for evaluating the behavior of the buried environment field of the underground isolation member of the present invention is the It is an apparatus that grasps and evaluates the behavior of a sample placed in the above state, for example, a radioactive waste isolated by a buffer material and a rock member around it. In other words, it is a device that grasps and evaluates the behavior of the surrounding environment including the bedrock in a disposal facility that isolates radioactive waste.

  The sample is accommodated in a container, and external force such as compaction and water permeability is applied, and stress corresponding to an environment of several hundred meters underground is applied to the sample. In this state, the behavior evaluation apparatus 1 generates a self-weight stress in the container according to the similarity law of the centrifugal force field, accelerates the situation corresponding to the environment of several hundred meters underground (consolidation, water permeability phenomenon), and the ground in the buried environment field. Evaluate the long-term behavior of the separator.

  The behavior evaluation apparatus will be specifically described with reference to FIG.

  FIG. 1 shows a schematic side view for explaining the overall configuration of a behavior evaluation device for a buried environment field of a ground isolation member using a container according to an embodiment of the present invention.

  The behavior evaluation apparatus 1 is provided with a central rotation shaft 2 that is rotatable about a central axis S (axial center) extending in the vertical direction. The central rotating shaft 2 is driven and rotated at a predetermined rotational speed by a driving means (not shown). A base end of the rotating arm 3 extending in the horizontal direction (a direction orthogonal to the axial direction) is provided at the lower portion of the central rotating shaft 2.

  A base end of a counter arm 4 is provided on the opposite side of the rotary arm 3 with the central rotary shaft 2 interposed therebetween, and a counter weight 5 is supported by being suspended from the tip of the counter arm 4 so as to be rotatable. A holding unit 6 is rotatably supported at the tip of the rotary arm 3, and a container 12 (details will be described later) in which the sample 11 (details will be described later) is stored in the holding unit 6. ) Is held.

  When the central rotating shaft 2 is driven and rotated about the central axis S, the rotating arm 3 and the counter arm 4 are turned at a predetermined speed. As the rotating arm 3 and the counter arm 4 are turned, a centrifugal force is applied to rotate the bottom portions of the counter weight 5 and the holding portion 6 outward, so that the rotating arm 3 and the counter arm 4, the counter weight 5 and the holding portion 6 are moved. Turn in a straight line. As a result, centrifugal acceleration is applied in the direction of the weight of the container 12 (sample 11).

  As will be described in detail later, the container 12 is provided with structural members that act on the sample 11 with external forces (pressures in three axial directions orthogonal to each other, water permeability pressure), and a water pressure supply device 15 for applying external forces. It has been. The central rotating shaft 2 is provided with a connecting member 16 for supplying pressurized water from a water pressure supply device 15 (water feed pump) to the container 12, and pressurized water having a predetermined pressure is supplied to the container 12 via the pressure generator 17. Supplied (external force applying means).

  In addition, it is possible to appropriately include equipment for reproducing the embedded environment field, such as a heating means for holding the sample 11 at a desired temperature.

  A storage unit 18 for sending the status (displacement, etc.) of the sample 11 accommodated in the container 12 is provided, and the information stored in the storage unit 18 is sent to the control device 19. In the control device 19, the behavior of the sample 11 is evaluated based on the state (displacement or the like) of the sample 11 under a state where centrifugal acceleration is applied in the direction of its own weight. Specifically, the situation (displacement, etc.) of the sample 11 is evaluated by being accelerated by the similarity law of the centrifugal force field, and for example, the behavior of the buried environment field of the underground isolation member is evaluated.

  This makes it possible to evaluate the behavior of the underground isolation member in the embedded environment field by physically evaluating the embedded environment for a long period in consideration of the influence of the interaction of a plurality of factors.

  An example of the sample 11 will be specifically described with reference to FIGS. FIG. 2 shows the appearance of the sample 11 and FIG. 3 shows the partially broken overview of the sample 11.

  A sample 11 as a scale model of an embedded environment member includes a cylindrical underground isolation member 21, and a plurality of bent cushion members 22 of bentonite members are stacked in the axial direction around the underground isolation member 21. Has been. A cylindrical rock member 23 is arranged around the cushioning material 22 and is, for example, a member of the surrounding environment including the rock in a disposal facility for isolating waste.

  An eddy current type non-contact displacement meter 24 (see FIG. 4) is disposed on the upper surface of the ground isolation member 21 as a first displacement detecting means. The non-contact displacement meter 24 (see FIG. 4) provides a ground isolation member. 21 displacement amounts are detected. Further, a strain gauge type earth pressure gauge 25 (see FIG. 4) is provided as a swelling detection means on the upper surface of the buffer material 22 of the underground isolation member 21, and the earth pressure gauge 25 (see FIG. 4) The swelling state (swelling characteristic) is detected.

  A plurality of strain sensors 26 (four in the illustrated example) as the second displacement detecting means are provided in the cylindrical portion around the rock member 23 in the axial direction (strain sensors 26a, 26b, 26c, 26d). The strain at the desired position in the axial direction of the rock member 23 (the desired position in the axial direction of the sample 11) is detected by the strain sensor 26.

  The sample 11 described above is accommodated in a container described later, and the displacement of the ground isolation member 21 (waste) and the buffer material 22 are measured by the non-contact displacement gauge 24, the earth pressure gauge 25, and the strain sensor 26 held in the container. The swelling behavior and the amount of strain of the rock member 23 are detected.

  It is also possible to attach a heater as a temperature adjusting means to the underground isolation member 21 and control the temperature of the underground isolation member 21 to a desired temperature in the actual underground environment.

  A container according to an embodiment of the present invention will be specifically described with reference to FIGS.

  FIG. 4 shows a side cross section of the container, and FIG. 5 shows a plane cross section of the container.

  The container 12 includes a container main body 32 that stores the sample 11, and stress corresponding to an environment of several hundred meters underground from the axial direction and the circumferential direction is applied to the sample 11 stored in the container main body 32. That is, the sample 11 is placed in a state of an embedded environment by applying pressure in the plane of the three axial directions orthogonal to each other inside the container main body 32. The container body 32 includes a gantry member 33, a cylindrical outer cylinder frame 34, and an upper lid member 35.

  The gantry member 33 of the container body 32 supports the lower end surface portion (one surface) of the cylindrical sample 11. An outer cylinder frame 34 is provided on the outer periphery of the upper surface of the gantry member 33, and the cylinder surface of the sample 11 is held via a cavity 41 (a gap serving as a fluid chamber) on the inner periphery of the outer cylinder frame 34. Is done. A rubber sleeve 42 as an elastic film material is disposed at the boundary between the hollow portion 41 and the cylindrical surface of the sample 11.

  On the upper side of the outer cylinder frame 34, an upper lid member 35 on which the upper end surface portion (the other surface) of the sample 11 is supported is provided. A non-contact displacement gauge 24 and a soil pressure gauge 25 are held on the upper lid member 35.

  A cylinder chamber 37 is formed on the upper surface side of the gantry member 33 inside the outer cylinder frame 34 (inside the rubber sleeve 42), and a piston 38 (one-way pressurizing means: external force applying means) is formed inside the cylinder chamber 37. Is provided. A water permeable plate 36 is provided on the bottom surface (one surface) of the sample 11, and the sample 11 is pressed upward (one side) through the water permeable plate 36 by driving the piston 38.

  Pressure water supply means 45 for injecting water into the cylinder chamber 37 is provided, and pressure water is supplied from the pressure water supply means 45 to the cylinder chamber 37 to drive the piston 38 (generate axial pressure). A water passage means 46 is provided for supplying water to the water permeable plate 36 through the piston 38 and allowing water to pass through the sample 11, and water is passed from the water passage means 46 to the sample 11.

  In addition, a constrained pressure water supply unit 47 is provided as a second-direction pressurizing unit that supplies pressurized water to the cavity 41, and the pressurized water is supplied from the constrained pressure water supply unit 47 to the cavity 41. Thereby, the periphery of the sample 11 is restrained via the rubber sleeve 42. That is, it is a fluid pressure unit that pressurizes the sample 11 in a direction crossing the axial pressure direction (one direction) (other direction pressurizing unit: external force applying unit).

  The pressurized water supply means 45, the water flow means 46, and the restrained pressure water supply means 47 are connected to the pressure generator 17 (see FIG. 1) of the behavior evaluation apparatus 1 (see FIG. 1).

  Further, a connection port 48 through which the signal line of the strain sensor 26 is passed is provided, and a detection signal of the strain sensor 26 is sent from the connection port 48 to the control device 19 (see FIG. 1) through the signal line.

  The operation state of the behavior evaluation apparatus 1 described above will be described.

  A predetermined pressure water is supplied to the container 12 held by the holding unit 6 by the water pressure supply device 15, the connection member 16, and the pressure generation device 17, and an external force is applied to the sample 11. That is, the axial pressure is applied to the sample 11 accommodated in the container body 32 by driving the piston 38, and the pressure is applied from the circumferential direction by water injection into the cavity 41. Water is passed through.

  By using the container 12 of the present invention, the pressure from the ground, the pressure from the rock, and the flow (behavior) of the groundwater corresponding to an environment of several hundred meters underground are reproduced. The stress and strain associated with the movement of the groundwater and the consolidation / swelling are reproduced in a state where the self-weight stress in a situation corresponding to an environment of several hundred meters underground is applied.

  If necessary, in order to directly confirm the situation that cannot be confirmed by the change in the detection value of the sensors, the internal situation of the specimen 11 immediately after the specimen 11 is accommodated in the container 12 is previously photographed with X-rays. Can do.

  Using the container 12 of the present invention, the behavior evaluation apparatus 1 is operated to reproduce the same weight stress as that of the real object in a state where the situation corresponding to the environment of several hundred meters underground is reproduced. Add centrifugal acceleration in the direction of its own weight.

  By rotating the central rotating shaft 2, the rotating arm 3 and the counter arm 4 are turned at a predetermined speed. As the rotating arm 3 turns, the bottom of the holding unit 6 is rotated outward by the centrifugal force, and the sample 11 in a state in which the situation corresponding to an environment of several hundred meters underground is reproduced is centrifuged in its own weight direction. Acceleration is applied, and the same weight stress as the actual product is reproduced.

  In a situation corresponding to an environment of several hundred meters underground, the stress and strain associated with the movement, consolidation, and swelling of groundwater are verified in a state where the same self-weight stress as the actual product is reproduced by centrifugal force.

  That is, the detection information of the non-contact displacement meter 24, the earth pressure gauge 25, and the strain sensors 26a, 26b, 26c, and 26d in the sample 11 (scale model) is sent to the storage unit 18 in a state where the same weight stress as that of the actual product is reproduced. And memorized. The information stored in the storage means 18 is sent to the control device 19, and the behavior of the sample 11 is evaluated based on the displacement and the like.

  That is, the displacement amount of the ground isolation member 21 is detected by the non-contact displacement meter 24, and subsidence (subsidence) due to its own weight, lifting (lifting) due to swelling of the buffer material 22, and the like are detected. The earth pressure gauge 25 detects the swelling state (swelling characteristics) of the buffer material 22, and the strain sensors 26 a, 26 b, 26 c, and 26 d detect the strain at a desired position in the axial direction of the rock member 23 (buffer material 22). .

  In the control device 19, the state of the sample 11 is accelerated by the similarity law of the centrifugal force field according to the detection state and evaluated, for example, the long-term behavior of the buried environment field of the underground isolation member 21 is evaluated in a short time.

  An example of the detection status of the non-contact displacement gauge 24, the earth pressure gauge 25, and the strain sensor 26 will be described with reference to FIG.

  FIG. 6 shows a change with time of displacement, FIG. 6 (a) shows a change with time of detection information of the non-contact displacement meter 24, FIG. 6 (b) shows a change with time of detection information of the earth pressure gauge 25, FIG. c) is a change with time of the detection information of the strain sensors 26a, 26b, 26c, and 26d.

  As shown in FIG. 6 (a), the detected value of the non-contact displacement meter 24 for detecting the axial displacement of the underground separating member 21 shows a value on the smaller side (sinking side) and then becomes larger. This indicates the value of (floating side), and changes to become the value of the side that becomes smaller (the sinking side) after rising.

  As shown in FIG. 6 (b), the detected value of the earth pressure gauge 25 for detecting the swelling state of the buffer material 22 shows a value on the side (swelling side) on which the water flow corresponding to groundwater advances and becomes larger, It changes as it becomes saturated and becomes smaller.

  That is, until the buffer material 22 swells, the ground isolation member 21 sinks due to its own weight, and then the ground isolation member 21 rises as the buffer material 22 swells. And if the buffer material 22 is saturated, it can be evaluated that the underground isolation member 21 sinks again by its own weight.

  As shown in FIG. 6 (c), the detection value of the lower strain sensor 26d on the lower side of the sample 11 is the first value that increases, and the detected values of the strain sensors 26c, 26b, 26a and the upper strain sensor 26 are sequentially detected. The value on the side where becomes larger. That is, it can be evaluated that the rock mass member 23 (buffer material 22) is displaced according to the influence of the weight of the sample 11.

  As shown in FIG. 6, the long-term behavior of the sample 11 can be evaluated in a short time by evaluating the behavior in a short time considering the effect of time acceleration.

  As a result, the stress and environment (consolidation, water permeability) corresponding to an environment of several hundred meters underground is accelerated, the displacement (floating, sinking) of the underground isolation member 21, the swelling behavior of the buffer material 22, the rock member 23 (buffer) The strain of the material 22) can be measured, and in the two-phase mixture of rock / soil and interstitial fluid such as groundwater, the long-term operation of the underground isolation member 21, the buffer material 22 and the rock member 23 in the buried environment field Can be evaluated.

  If necessary, in addition to the evaluation with sensors, the internal situation of the sample 11 should be photographed by X-ray, and the actual position change of the ground isolation member 21 and the change of the joint of the buffer material 22 should be confirmed directly. Can do.

  In the above-described embodiment, the sample 11 is evaluated by holding the container 12 containing the sample 11 in the holding unit 6. However, when the sample 11 is evaluated, the behavior evaluation apparatus 1 is not used. It can also be used for the sample holder of the evaluation device. It is also possible to install the container 12 in a predetermined environment and detect a change with time of the sample 11 in a stress / environment corresponding to an environment of several hundred meters underground.

  The behavior evaluation apparatus 1 can apply a self-weight stress by applying a centrifugal action to a two-phase mixture of rock / soil and a crevice fluid such as groundwater, and the underground isolation member 21 and the buffer material 22 in a buried environment field. Therefore, it is possible to evaluate the behavior of the rock member 23 over a long period of time, and it is possible to reproduce the stress and strain accompanying the movement of the groundwater and the consolidation / swelling. As a result, it is possible to evaluate the behavior of the underground isolation member in the embedded environment field by physically evaluating the embedded environment for a long period in consideration of the influence of the interaction of a plurality of factors.

  The container 12 described above can be used as a container 12 for storing the sample 11 for evaluating the behavior of the buried environment field of the underground isolation member 21 including the influence of the surrounding rock.

  INDUSTRIAL APPLICATION This invention can be utilized in the industrial field | area of the container which accommodates the buried environment member model for performing the behavior evaluation of the buried environment field of the underground isolation member including the influence of the surrounding rock mass.

DESCRIPTION OF SYMBOLS 1 Behavior evaluation apparatus 2 Center rotating shaft 3 Rotating arm 4 Counter arm 5 Counter weight 6 Holding part 11 Sample 12 Container 15 Water pressure supply device 16 Connection member 17 Pressure generator 18 Memory | storage means 19 Control apparatus 21 Underground isolation member 22 Buffer 23 Rock member 24 Non-contact displacement meter 25 Earth pressure gauge 26 Strain sensor 32 Container body 33 Base member 34 Outer cylinder frame 35 Upper lid member 36 Water permeable plate 37 Cylinder chamber 38 Piston 41 Cavity 42 Rubber sleeve 45 Pressure water supply means 46 Water passage means 47 Restrained pressurized water supply means 48 Connection port

Claims (3)

A container for accommodating a buried environmental member model in which a cushioning material is arranged around the ground isolation member, and further, a rock member is arranged around,
A container body in which the embedded environment member model is accommodated in a state where the periphery is covered;
First displacement detection means provided on the container body for detecting the displacement of the underground isolation member;
Swelling detection means for detecting the swelling state of the buffer material provided in the container body;
Second displacement detection means for detecting displacement of the rock member;
Unidirectional pressurizing means for pressurizing the embedded environmental member model in one direction;
Other direction pressurizing means for pressurizing the embedded environment member model in a direction crossing one direction;
A container for storing a buried environment member model for evaluating the behavior of the buried environment field of the underground isolation member, characterized in that the buried environment member model includes water passage means for passing water. In a container for storing a buried environment member model for evaluating the behavior of the buried environment field of the underground isolation member according to claim 1,
The first displacement detection means is a non-contact displacement means for detecting the displacement of the ground isolation member in a non-contact manner through the cavity of the buffer material,
The swelling detection means is a pressure detection means for detecting the swelling state of the buffer material by detecting the pressure of the buffer material,
The second displacement detection means is a strain detection means for detecting a strain attached to the rock member,
The one-way pressurizing means is a piston that is driven by fluid pressure and presses the embedded environment member model to one side,
The other-direction pressurizing means is a fluid chamber formed through an elastic membrane material around a direction intersecting the one direction of the embedded environment member model. A container that houses a buried environmental member model for evaluating the behavior of an environmental field. In a container for storing a buried environment member model for evaluating the behavior of the buried environment field of the underground isolation member according to claim 2,
In the buried environment member model,
The underground isolation member is cylindrical,
The buffer member
A ring-shaped bentonite-based member arranged in a plurality of layers in the axial direction around the underground isolation member;
The rock member is
It is a cylindrical rock mass member that is arranged around the bentonite-based members that are stacked in multiple layers,
The axial direction of the cylindrical embedded environmental member model is one direction, and the embedded environmental member model is accommodated in the container body,
The container body is
A gantry member on which one surface of the end surface portion of the cylindrical embedded environment member model is supported;
An outer cylinder frame which is arranged on the upper surface of the gantry member, and the cylindrical surface of the embedded environment member model is held via a gap serving as the fluid chamber of the other-direction pressurizing means;
It is arranged on the upper side of the outer cylinder frame body, and is configured with an upper lid member on which the other surface of the end surface portion of the embedded environment member model is supported,
The piston of the one-way pressurizing means is provided between the upper surface of the gantry member and one surface of the end surface portion of the embedded environment member model,
The gantry member has a pressurized water supply means for supplying the pressurized water for driving the piston to generate an axial pressure in the buried environment member model, and a pressurized water for the fluid chamber of the other direction pressurizing means. A restraint pressure water supply means for supplying
The non-contact displacement means and the pressure detection means are held by the upper lid member. A container for accommodating a buried environment member model for evaluating the behavior of the buried environment field of the underground isolation member, .

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