JP2005076200A - Soil sampling apparatus and soil sampling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soil sampling apparatus which can collect soil samples in a depth direction, that are necessary at every predetermined work, without hindering execution of deep chemical mixing, by carrying out simple work with safety and without labor, and to provide a soil sampling method. <P>SOLUTION: According to the structure of the soil sampling apparatus, a cylindrical sampling container 1 opening upward and downward, has a cover 2 arranged in a lower opening 1a thereof such that the cover is swayed upward in the sampling container 1 to open the lower opening 1a and swayed downward to block the lower opening 1a. Then the sampling container 1 is inserted into a hole S in which soil cement is generated, and then the container is stopped at a desired depth, followed by elevating the same. Before the sampling container 1 inserted into the hole S in which the soil cement is generated, is stopped at the desired depth, the soil cement is allowed to pass in the sampling container 1, and therefore the cover 2 maintains its open state. On the other hand when the sampling container 1 is elevated, the cover 2 is closed due to the load of the soil cement, and therefore the soil cement sample at the desired depth is trapped in the sampling container 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sample soil collecting apparatus and a sample soil collecting method for collecting sample soil such as soil cement at a desired depth of a drilling hole.

  In the deep mixing method, etc., the soil cement solidified material is constructed by mechanically stirring and mixing the raw soil and cement-based solidified material slurry at the natural position and depth of the site. At this time, as quality control, a soil cement sample (sample soil) before solidification is collected from a desired depth, and the compressive strength is measured after curing for a predetermined number of days.

  Conventionally known sample soil collection devices are configured such that the upper opening of a box-shaped collection container can be opened and closed by an upper lid. The upper lid is normally held in a closed state in which the upper opening of the collection container is closed. The upper lid is in an open state in which a wire or the like is attached and the upper opening of the collection container is opened manually. And the sample soil sampling method using the said sample soil sampling apparatus provides a hole with a deep layer processing machine, injects the slurry into the hole, stirs and mixes, and then inserts an insertion member such as H steel with a crane. insert. The sample soil test apparatus is attached to the insertion member, and after inserting it to a desired depth, the upper cover is opened by manual operation of the wire, and the insertion member is pulled up to pull up the sample soil of the soil cement before solidification in the collection container. Collect.

  In addition, a conventionally known sample soil collection device includes a cylindrical collection container having an opening on a side surface, an upper piston that is slidably provided on an upper portion of the collection container and can close the opening, A lower piston slidably provided at the lower portion, an operating rod for moving the upper piston, and a wire for connecting the upper and lower pistons are provided. The sample soil sampling method using the sample soil sampling apparatus is to lift the operating rod by lifting the operating rod after penetrating the sampling container into a predetermined position in the soil with the opening portion closed by the upper piston. The sample soil is caused to flow into the collection container from the opening by the negative pressure suction force of the upper piston. Further, the upper piston is raised, the lower piston is positioned above the opening, and the sample soil is collected with the sample soil sandwiched between the upper piston and the lower piston (see, for example, Patent Document 1).

JP 2002-54129 A

  However, in the conventionally known devices and methods, when the sampling depth is deep, the upper lid may not be opened due to the weight of the soil cement in the upper layer. During the descent, the upper lid may open and sample soil above the desired depth may be collected. It is unclear whether the upper lid is in an open state. Manual operation of the wire near the hole is dangerous. When sampling soil at multiple points in the depth direction of the hole, it takes time to operate the wire after inserting the container into the hole and closing and fixing the upper lid after lifting the container. . There was a problem that the construction efficiency was lowered because the wire was manually operated during the operation of the crane for sampling the sample soil.

  In addition, with a conventionally known apparatus and method, sample soil in a narrow range can be collected, but the work is not easy due to the complicated mechanism, and it takes time and time for cleaning. There was a problem that the construction efficiency decreased because the piston was lifted during the operation of the crane for sampling the sample soil.

  In view of the above circumstances, the present invention can collect the sample soil in the depth direction required for each fixed construction amount by a simple operation that does not hinder the construction of the deep mixing process and is safe and labor-saving. An object of the present invention is to provide a sample soil collecting apparatus and a sample soil collecting method.

  In order to achieve the above object, a sample soil collecting apparatus according to claim 1 of the present invention is supported by a cylindrical collection container that opens up and down, and a lower opening of the collection container. A lid portion that swings upward inside the container to open the lower opening and closes to close the lower opening by swinging downward. And

  Further, the sample soil collecting apparatus according to claim 2 of the present invention is the regulation according to claim 1, wherein the sample soil collecting device is brought into contact with the lid portion in the open state and stops the lid portion at a position separated from the inner wall surface of the collection container. A member is provided.

  A sample soil collecting apparatus according to a third aspect of the present invention is the sample soil collecting device according to the first or second aspect, wherein the sample soil collecting apparatus is provided at an opening periphery of the lower opening of the collection container, An engagement edge member is provided that maintains the closed state of the lid in a manner to engage and seal the lower opening.

  A sample soil collecting device according to claim 4 of the present invention is provided in the outer wall of the collection container according to any one of claims 1 to 3, and is provided in a drilling hole in which mixed soil is generated. It is characterized by comprising a fixing portion that is detachably attached to the inserting member to be inserted.

  A sample soil collecting method according to claim 5 of the present invention includes a step of attaching the collection container according to any one of claims 1 to 4 to an insertion member, and a cutting method in which mixed soil is produced from the insertion member. A step of opening the lid with mixed soil that is inserted into a hole and passes through the inside of the sampling container; and the insertion member is stopped at a desired depth position of the drilling hole and desired inside the sampling container. And storing the sample soil of the mixed soil of a depth of 5 and the step of lifting the insertion member from the hole and closing the lid with the load of the sample soil stored inside the sampling container Features.

  The sample soil collecting apparatus according to the present invention allows the mixed soil to pass through the inside of the sampling container until the sampling container is inserted into the drilling hole in which the mixed soil is generated and stops at a desired depth. Becomes open. Then, when the collection container is pulled up from a desired depth, the lid portion is closed by the load of the sample soil stored in the collection container, and the sample soil at a desired depth is contained inside the collection container. Therefore, it is possible to easily collect sample soil at a desired depth with a simple configuration.

  In addition, by stopping the lid portion in the open state by the regulating member at a position separated from the inner wall surface of the collection container, the load of the sample soil is easily applied to the lid portion when the collection container is pulled up from a desired depth. The closed state of the part can be obtained easily and quickly.

  And, by holding the closed state of the lid in a manner in which the lower opening is sealed by the engaging edge member, the situation where the sample soil leaks from the lower opening 1a when the collection container is pulled up from a desired depth. Can be prevented. Furthermore, since there is no leakage of the sample soil from the lower opening 1a, there is no movement of the sample soil inside the collection container when the collection container is pulled up, and mixed soil of another depth from the upper opening is mixed. Can be prevented.

  Furthermore, since it is detachably attached to the insertion member via the fixed portion, a dedicated insertion member for sampling the sample soil is not required, and a stress material such as H steel inserted into the drilling hole is substituted for the insertion member. can do.

  The sample soil sampling method according to the present invention is a simple and safe operation that requires only a sample container to be attached to the insertion member, and then pulled up after inserting the sample container into the drilled hole where the mixed soil has been generated and stopped at the desired depth. Thus, the sample soil in the depth direction required for each fixed amount of construction can be collected without hindering the construction of the deep mixing process.

  Exemplary embodiments of a sample soil collecting apparatus and a sample soil collecting method according to the present invention will be described below in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments.

  FIG. 1 is a perspective view showing a sample soil collecting apparatus according to the present invention, FIG. 2 is a side view showing the sample soil collecting apparatus according to the present invention, and FIG. 3 is a side sectional view showing the operation of the sample soil collecting apparatus according to the present invention. It is.

  As shown in FIGS. 1 to 3, the sample soil collecting device includes a collecting container 1 as a base. The collection container 1 is made of iron or stainless steel and is formed in a cylindrical shape that opens up and down. The cylinder forming the collection container 1 is a square cylinder in this embodiment. The cylindrical shape of the collection container 1 may be various shapes such as a cylindrical shape.

  A lid 2 is provided in the lower opening 1 a of the collection container 1. The lid 2 is a plate made of iron or stainless steel having an outer shape along the cylindrical inner shape of the collection container 1, and is supported so as to be swingable with respect to the inner wall surface of the collection container 1 via a hinge 3. . The lid 2 swings upward inside the collection container 1 via the hinge 3 while swinging downward.

  On the inner wall surface close to the lower opening 1a of the collection container 1, a regulating member 4 is provided. The regulating member 4 is fixed to the inner wall surface of the collection container 1 in such a manner that it comes into contact with the plate surface of the lid portion 2 that swings upward. The lid 2 is in an open state in which the lower opening 1a is opened by swinging upward inside the collection container 1. Then, the restricting member 4 abuts on the lid portion 2 in an open state as indicated by a one-dot chain line in FIG. 3 and stops the lid portion 2 at a position separated from the inner wall surface of the collection container 1. In this way, the restricting member 4 restricts the situation in which the lid portion 2 in the open state contacts the inner wall surface of the collection container 1.

  An engagement edge member 5 is provided in the lower opening 1 a of the collection container 1. The engaging edge member 5 is provided so as to extend inward of the cylindrical shape of the collection container 1 in such a manner that the area of the opening is narrowed along the opening periphery of the lower opening 1a. The engagement edge member 5 is engaged with the outer edge of the lid portion 2 to hold the lid portion 2 in a substantially horizontal position when the lid portion 2 swings downward as shown by a solid line in FIG. To do. Thereby, the lid 2 is in a closed state in which the lower opening 1a of the collection container 1 is closed. In this manner, the engagement edge member 5 holds the closed state of the lid portion 2 in such a manner as to overlap the outer edge of the lid portion 2 and seal the lower opening 1a. The upper opening 1b of the collection container 1 is always open.

  A fixed portion 6 is provided on the outer wall of the collection container 1. The fixing portion 6 is made of a plate material made of iron or stainless steel, extends on opposite sides of the sampling container 1 and is provided with the respective plate surfaces (contact surfaces) facing the same plane. In the present embodiment, one plate piece bent into a substantially L-shaped cross section is fixed to each outer wall in the opposite direction of the rectangular collection container 1 so that the other plate piece is fixed. A portion 6 is provided extending from the collection container 1. The fixing portion 6 is used for attachment to an insertion member 15 described later.

  Hereinafter, a sample soil sampling method using the sample soil sampling apparatus having the above configuration will be described. FIG. 4 is a process diagram showing a sample soil collecting method according to the present invention, and FIG. 5 is a perspective view showing an attached state of the sample soil collecting apparatus according to the present invention.

  First, as shown in FIG. 4 (a), a drilling hole S is excavated in the ground G by the deep mixing processor 10, and a cement-based solidifying material slurry is injected into the drilling hole S. A soil cement is produced as a mixed soil mixed with the system solidifying material slurry. The cement-based solidifying material slurry is obtained by mixing cement stored in the cement silo 11 and bentonite stored in the bentonite silo 12 with the mixer 13, and is supplied to the deep mixing processor 10 by the grout pump 14.

  Next, as shown in FIG. 4B, the sampling container 1 is inserted into the drilling hole S in which the soil cement has been generated. The collection container 1 is attached to the insertion member 15. As shown in FIG. 5, when the insertion member 15 is a stress material such as H steel as shown in FIG. 5, the collection container 1 is attached to the insertion member 15 on the outer wall surface of the insertion member 15. ), And the fixing portion 6 and the insertion member 15 are both clamped by the holder 16 and attached detachably. When the insertion member 15 to which the collection container 1 is attached is lifted by a crane or the like and inserted into the drilling hole S, the soil cement in the drilling hole S lifts the lid 2 from the lower opening 1a of the sampling container 1 when lowered. The lid portion 2 is pushed up to be opened. And the soil cement in the drilling hole S passes through the inside of the collection container 1 from the lower opening 1a and is discharged from the upper opening 1b. At this time, the regulating member 4 regulates the position of the lid portion 2 in an open state so that the lid portion 2 does not contact the inner wall surface of the collection container 1.

  Next, as shown in FIG. 4 (c), when the collection container 1 reaches a desired depth, the insertion of the insertion member 15 into the hole S is stopped. At this time, a soil cement sample (sample soil) having a desired depth that has entered from the lower opening 1a when descending is stored in the collection container 1.

  Next, the collection container 1 is pulled up from the hole S as shown in FIG. That is, the insertion member 15 is pulled up with a crane or the like. At this time, the load of the soil cement sample stored in the inside of the collection container 1 is applied to the lid portion 2 in the open state. Then, the lid 2 swings downward due to the load of the soil cement sample and enters a closed state. As a result, the lower opening 1a is closed and a soil cement sample of a desired depth is contained in the collection container 1. Further, when the collection container 1 is raised, the lower opening 1a is closed, so that there is no movement of the soil cement sample inside the collection container 1, and soil cement of another depth from the upper opening 1b is mixed. There is nothing.

  Then, after collecting the soil cement sample inside the collection container 1, the collection container 1 is removed from the insertion member 15 and the stress material used as the insertion member 15 is inserted into the hole S. Then, a soil cement wall is formed by forming a soil cement in the drilled holes S arranged in parallel and inserting a stress material. The collected soil cement sample is subdivided into a strength test mold (for example, a cylindrical container of φ5 cm × 10 cm), and the compressive strength is measured after curing for a predetermined number of days for quality control.

  When collecting soil cement samples at multiple points in the depth direction of the drilling hole S, it is not necessary to open / close the lid 2 and only the sampling container 1 is washed, which hinders the construction of the deep mixing process. Don't be.

  Therefore, in the sample soil collecting apparatus described above, the lower opening 1a of the cylindrical collection container 1 that opens up and down swings upward inside the collection container 1 to open the lower opening 1a. On the other hand, a simple configuration is provided in which a lid portion 2 that swings downward and closes the lower opening 1a is provided. Then, until the sampling container 1 is inserted into the drilling hole S in which the soil cement has been generated and stopped at a desired depth, the soil cement is passed through the sampling container 1 to open the lid 2 and the sampling is performed. When the container 1 is pulled up, the lid 2 is closed with the load of the soil cement, and a soil cement sample at a desired depth is contained in the collection container 1. In this way, a soil cement sample having a desired depth can be obtained with a simple configuration.

  The sample soil collecting device is configured to stop the lid portion 2 opened by the regulating member 4 at a position separated from the inner wall surface of the sampling container 1. Thereby, when the collection container 1 is pulled up, the load of the soil cement is easily applied to the lid portion 2, so that the closed state of the lid portion 2 can be obtained easily and quickly.

  The sample soil sampling apparatus is configured to maintain the closed state of the lid 2 in a mode in which the lower opening 1 a is sealed by the engagement edge member 5. This makes it possible to prevent the soil cement sample from leaking from the lower opening 1a when the collection container 1 is pulled up. Furthermore, since there is no leakage of the soil cement sample from the lower opening 1a, there is no movement of the soil cement sample inside the collection container 1 when the collection container 1 is pulled up, and other depths from the upper opening 1b. It becomes possible to prevent the situation where the soil cement is mixed.

  The sample soil collecting device is configured to be detachably attached to the insertion member 15 via the fixing portion 6. Thereby, it is possible to substitute a stress material such as H steel inserted into the drilling hole as the insertion member 15 without requiring the dedicated insertion member 15 for sampling the sample soil.

  Further, in the above-described sample soil collecting method, the collection container 1 is attached to the insertion member 15, and the collection container 1 is inserted into the drilling hole S in which the soil cement is generated and stopped at a desired depth. It is possible to collect the sample soil in the depth direction, which is required for each fixed construction amount, with a simple work that does not take place without interfering with the construction of the deep mixing process.

  As described above, the sample soil collecting apparatus and the sample soil collecting method according to the present invention are useful for collecting sample soil such as a soil cement sample at a desired depth of a drilling hole, and are particularly necessary for each fixed construction amount. It is suitable for collecting the sample soil in the depth direction, which does not interfere with the construction of the deep mixing process, by simple work that is safe and hassle-free.

It is a perspective view which shows the sample soil sampling apparatus which concerns on this invention. It is a side view which shows the sample soil sampling apparatus which concerns on this invention. It is a sectional side view which shows operation | movement of the sample soil sampling apparatus which concerns on this invention. It is process drawing which shows the sample soil sampling method which concerns on this invention. It is a perspective view which shows the attachment state of the sample soil sampling apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sampling container 1a Lower side opening part 1b Upper side opening part 2 Lid part 3 Hinge 4 Control member 5 Engagement edge member 6 Fixing part 10 Deep layer processing machine 11 Cement silo 12 Bentonite silo 13 Mixer 14 Grout pump 15 Insertion member 16 Holder G Ground S Drilling

Claims (5)

A cylindrical collection container that opens up and down;
The lower opening is supported by the lower opening of the collection container and swings upward inside the collection container to open the lower opening, while swinging downward to the lower opening. A sample soil collecting device comprising: a lid portion for closing the lid.   The sample soil collecting apparatus according to claim 1, further comprising a regulating member that contacts the lid portion in an open state and stops the lid portion at a position separated from the inner wall surface of the collection container.   It is provided at the opening peripheral edge of the lower opening of the collection container, and holds the closed state of the lid in such a manner that the lower opening is sealed by engaging with the outer edge of the lid in the closed state. The sample soil collecting apparatus according to claim 1, further comprising a joint member.   4. The fixing device according to claim 1, further comprising a fixing portion that is provided on an outer wall of the sampling container and is detachably attached to an insertion member that is inserted into the drilling hole in which the mixed soil is generated. The sample soil collecting device according to any one of the above. Attaching the collection container according to any one of claims 1 to 4 to an insertion member;
Inserting the insertion member into the drilling hole in which the mixed soil is generated and opening the lid with the mixed soil passing through the inside of the collection container; and
Stopping the insertion member at a desired depth position of the drilling hole and storing a sample soil of mixed soil at a desired depth inside the sampling container;
And a step of pulling up the insertion member from the hole and closing the lid with the load of the sample soil stored in the collection container.

Images