JP3886979B2 - Specimen underwater curing simulation system and simulation method thereof - Google Patents

Description

  The present invention relates to a system and method for simulating a situation in which a sample made of a mixture of various aggregates, which are construction materials, used in water such as rivers or oceans is placed in water according to the water depth. More specifically, a specimen capable of simulating placing conditions and curing conditions for a sample composed of a mixture of various aggregates under the same environmental conditions as water, such as water pressure and the presence of salt. The present invention relates to an underwater curing simulation system and method thereof.

  Currently, various ground works and structure installation works that are performed on land are also applied to rivers or the seabed. However, unlike the general land environment, there are various variables, such as the presence of water pressure or salinity corresponding to a certain water depth, in the environment of rivers or the seabed. For this reason, the strength of the aggregate mixture under the air curing condition and the strength of the aggregate mixture under the seabed curing condition cannot be the same. Therefore, in order to perform ground construction on a river or the seabed, it is necessary to obtain data on the conditions for setting the aggregate mixture and the curing conditions in advance in consideration of the environmental conditions.

  Conventionally, when performing a foundation construction or the like on a river or the seabed, as a method of preparing a specimen and simulating some mechanical conditions of the specimen, a cylindrical pressure mold is filled with a sample, There was a method of simulating the placing conditions and curing conditions of the sample in a state where water was added and a constant water pressure was applied after the container was placed in the container.

  However, in the conventional method, a constant pressure is applied after the sample is filled in a cylindrical pressure mold in advance at atmospheric pressure. It is not possible to simulate the water pressure conditions. In other words, the mechanical properties of specimens manufactured by conventional methods do not take into account the effects of water pressure conditions at rivers or seabeds, and do not conform to the mechanical conditions considering actual site conditions. It was. In addition, the water pressure applied to the cylindrical pressure mold is only applied from above and below the pressure mold filled with the sample, and is not applied from the side at all. There was a problem that the data about the conditions could not be trusted.

  The present invention has been made in view of the above problems, and an object of the present invention is to place the sample in the same state as the environmental conditions of the river or the seabed, so that the placing conditions and curing conditions for the sample are achieved. It is an object of the present invention to provide an underwater curing simulation system for a specimen and a method thereof capable of accurately simulating, for example, an actual site.

  In order to achieve the above object, the present invention provides a container capable of storing water; one or more pressure molds disposed at the inner lower end of the container and containing a sample; a lid for covering the container; and the container A fastening means for airtightly fastening the lid and the lid, a regulator for adjusting the water pressure inside the container, and a sample injection device for injecting the sample into the pressure mold from the outside of the container Is done.

  The present invention also includes a step of disposing one or more pressure molds at an inner lower end of a container capable of storing water, a step of injecting water into the container, a top of the container covered with a lid, and the container by means of fastening means. A step of sealing the inside of the container, a step of adjusting the water pressure inside the container with a regulator, and a step of injecting a sample for a specimen into the pressure mold from the outside of the container.

  By using the underwater curing simulation system and method of a specimen according to the present invention, it is possible to obtain a specimen in which the same conditions as the actual environment are reflected as they are, and accurately characterize various mechanical conditions. It becomes possible to grasp.

  The configuration of an embodiment according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is an external perspective view of an underwater curing simulation system for a specimen according to the present invention, and FIG. 2 is a side view of the underwater curing simulation system for a specimen according to the present invention.

  According to FIG.1 and FIG.2, the rotation flat plate 11 which can rotate 360 degrees is provided in the inner lower part of the container 10 which can store water. An inner magnet housing member 12 </ b> A for housing the inner magnet is attached to the side surface of the rotating plate 11, and an outer magnet 12 </ b> B that is coupled by magnetic force corresponding to the inner magnet is attached to the outer surface of the container 10. . A large number of cylindrical pressure molds 20 are arranged on the upper surface of the rotating plate 11. Further, the rotary plate 11 is provided with a cylindrical projection 11A on the upper surface thereof for supporting the pressure mold 20 so as not to fall when the pressure mold 20 is disposed. The pressure mold 20 is filled with a specimen sample.

  FIG. 3 shows the appearance of the pressure mold 20 in more detail. A large number of holes 21 are formed in the side surface of the pressure mold 20. The numerous holes 21 are provided so that the same water pressure is applied to the sample filled in the pressure mold 20 not only from above and below but also from the side. Further, the film 22 is inserted into the pressure mold 20 so as to surround the entire inner wall of the pressure mold 20. Since the film 22 is interposed between the inner wall of the pressure mold 20 and the sample, the sample leaks from the hole 21 formed in the outer surface of the pressure mold 20 when the sample is filled in the pressure mold 20. This is to block fear.

  Referring to FIGS. 1 and 2 again, there is a lid 30 that covers the container 10, and the lid 30 and the container 10 are airtightly coupled by the fastening means 40. In this embodiment, the bolt / nut type fastening means 40 surrounding the outside of the container 10 is used, but the present invention is not limited to this. A regulator 50 is attached to the upper surface of the lid 30 to appropriately adjust the water pressure inside the container 10. A sample injection device 60 is attached to the upper surface of the lid 30. FIG. 4 shows a more detailed drawing for the sample injection device 60.

  The sample injection device 60 includes a cylinder 61, a sample injection tube 62, a sample hose 63, a sample injection tube fixing member 64, a rod 66, and the like. The cylinder 61 is in a hollow state, one end of which is open so that the rod 66 can be inserted, and the other end is closed. One end of the cylinder 61 passes through the lid 30. The sample injection tube fixing member 64 is provided so as to surround the outer surface of the cylinder 61 in an annular shape, and one end thereof extends horizontally. The sample injection tube 62 is fixed in parallel with the cylinder 61 by the horizontally extended portion. A cylinder magnet 65 </ b> A is attached to the outer surface of the sample injection tube fixing member 64.

  One end of the sample injection tube 62 is connected to a flexible sample hose 63, and the sample is discharged into the pressure mold 20 through the other end. A rod magnet 65 </ b> B is built in the lower portion of the rod 66. By inserting the rod 66 into the opened cylinder 61, the rod magnet 65B and the cylinder magnet 65A are coupled by magnetic force. As a result, the sample injection tube fixing member 64 and the sample injection tube 62 fixed to the rod 66 move in the same direction as the movement direction of the rod 66 in accordance with the movement of the rod 66 in the vertical or horizontal rotation direction. Become. That is, since the rod magnet 65B is coupled to the cylinder magnet 65A by magnetic force, if the rod 66 moves downward, the sample injection tube fixing member 64 also moves downward, thereby being fixed by the sample injection tube fixing member 64. The sample injection tube 62 also moves downward. The same applies when the rod 66 moves upward, and the same applies when the rod 66 rotates left and right.

  Hereinafter, the operation of the underwater curing simulation system for a specimen according to the present invention will be described.

  First, the experimenter prepares a sample made of a mixture in which various aggregates are blended in a desired ratio. Here, in the underwater curing simulation system for a specimen according to the present invention, since a large number of pressure molds 20 can be arranged, a large number of samples having different blending rates can be prepared.

  The experimenter places a predetermined pressure mold 20 on the rotating plate 11. Then, water is injected into the container 10. Here, the water may be river water in a region to be simulated, or seawater containing salt or the like, and mixed water in consideration of various variables can also be used. That is, the environmental conditions in the container can be set in the same manner as the actual on-site conditions. Next, the top of the container 10 is covered with the lid 30, and the inside of the container 10 is sealed with the fastening means 40. Thereafter, pressure is applied to the inside of the container 10 using an air compressor, and the pressure is adjusted by the regulator 50. The pressure to be adjusted here may correspond to the water pressure desired by the experimenter, for example, at a seabed of several tens of meters. After the adjustment of the pressure is completed, the experimenter injects a specimen sample prepared in advance into the pressure mold 20 disposed inside the container 10 via the sample injection device 60 from the outside of the container 10. The experimenter moves the rod 66 downward, directs the sample injection tube 62 into the pressure mold 20, and then fills the sample. Thereafter, the rod 66 is gradually moved upward in accordance with the degree of filling. That is, the height of the sample injection tube 62 can be adjusted by moving the rod 66 up and down. When the filling of the sample into the pressure mold 20 is completed, the water pressure inside the container 10 adjusted by the regulator 50 is applied at the same pressure from above and below the pressure mold 20 and from the side.

  On the other hand, when a large number of pressure molds 20 are used, when the filling of one pressure mold 20 is finished and the other pressure mold 20 is filled with the sample, the next pressure mold 20 that requires filling is located. The outer magnet 12B attached to the outer surface of the container 10 may be rotated leftward or rightward by the rotational angle. In this case, since the inner magnet is coupled to the outer magnet 12B by magnetic force, the rotary plate 11 also rotates in the same direction. As a result, the sample injection tube is positioned above the other pressure mold, and the sample can be filled.

  When a predetermined time elapses after all the filling is completed, the experimenter can obtain a specimen in which the actual on-site conditions are reflected as it is, and various dynamics such as density and strength can be obtained from the specimen. Data on characteristics can be obtained.

  The present invention has been described above based on the specific embodiments. However, the present invention is not limited to this, and it goes without saying that modifications and improvements can be made within the scope of ordinary knowledge of those skilled in the art. It is.

1 is an external perspective view of an underwater curing simulation system for a specimen according to the present invention. 1 is a side view of an underwater curing simulation system for a specimen according to the present invention. It is a perspective view of the pressure mold used for the underwater curing simulation system of the specimen by this invention. 1 is an external perspective view of a specimen sample injection device used in an underwater curing simulation system for a specimen according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Container 11 Rotating flat plate 12A Inner magnet storage member 12B Outer magnet 20 Pressure mold 21 Hole 22 Film 30 Lid 40 Fastening means 50 Regulator 60 Sample injection device 61 Cylinder 62 Sample injection tube 63 Sample hose 64 Sample injection tube fixing member 65A Cylinder magnet 65B Rod magnet 66 Rod 100 Underwater curing simulation system for specimen

Claims (6)

A container that can store water,
One or more pressure molds disposed at the inner lower end of the container and containing a sample;
A lid for covering the container;
Fastening means for airtightly fastening the container and the lid;
A regulator for adjusting the water pressure inside the container;
An underwater curing simulation system for a specimen, comprising: a sample injection device for injecting a sample into the pressure mold from the outside of the container.   The underwater curing simulation system for a specimen according to claim 1, wherein the pressure mold has one or more holes on a side surface thereof.   The underwater curing simulation system for a specimen according to claim 2, wherein a film is inserted so as to surround an inner wall of the pressure mold. The above container
A rotating flat plate provided on the inner lower side of the container and having the pressure mold disposed on the upper surface;
An inner magnet housing member that houses the magnet and is attached to a side surface of the rotating plate;
The underwater curing simulation system for a specimen according to claim 1, further comprising an outer magnet attached to the outer surface of the container so as to be coupled to the inner magnet housed in the inner magnet housing member by magnetic force. The sample injection apparatus is
A hollow cylinder that is provided so as to penetrate a part of the lid, one end of which is open and the other end is closed,
A sample injection tube that extends in a direction parallel to the cylinder, one end of which is connected to the sample hose and the sample is discharged from the other end,
A cylinder magnet is attached to the outer surface, is installed so as to surround the outer surface of the cylinder, and a sample injection tube fixing member for fixing the sample injection tube,
2. The underwater curing simulation system for a specimen according to claim 1, further comprising: a rod having a magnet built in one end thereof and inserted into the cylinder. Placing one or more pressure molds on the inner lower edge of the container capable of storing water;
Injecting water into the container;
Covering the top of the container with a lid, and sealing the inside of the container with fastening means;
Applying pressure to the inside of the container with an air compressor and adjusting the water pressure inside the container with a regulator;
An underwater curing simulation method for a specimen, comprising: injecting a sample into the pressure mold through a sample injection device from the outside of the container.

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