JP2008280817A - Device and method for sampling from columnar soil improved body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sampling device for a columnar soil improved body capable of performing accurate inspection by sampling improved soil from the columnar soil improved body over a wide area in the radial direction. <P>SOLUTION: This sampling device 1 comprises a cylindrical sampling member 3 fitted to the base end of a rotating rod 2, extending to the radially outward of the rotating rod 2, and rotated about the rotating rod 2 by the rotation of the rotating rod 2. A sampling compartment 6a extending in the radial direction of the rotating rod 2 and a sampling port 6b extending in the radial direction of the rotating rod 2 are formed in the sampling member 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a columnar ground improvement body sampling apparatus and method.

In the construction of the columnar ground improvement body, in order to check the soil quality of the formed columnar ground improvement body, a sample is taken from the columnar ground improvement body. A cylindrical portion for sampling is provided coaxially with the rotating rod on the shaft core portion of the rotating rod provided with a stirring portion, and the cylindrical portion is rotated integrally with the rotating rod to improve the soil around the cylindrical portion. A sampling device adapted to collect is provided.
Japanese Patent Application Laid-Open No. 08-049490

  However, in the sampling device as described above, it is possible to sample the improved soil in the vicinity of the outer peripheral portion of the rotating rod, but it is not possible to collect the improved soil separated in the radial direction from the outer peripheral portion of the rotating rod, There is a problem that high inspection accuracy cannot be secured.

  In view of the above problems, the present invention can collect improved soil over a wide range in the radial direction of the columnar ground improvement body, and can realize a highly accurate inspection. It is an object to provide a sampling device and the like.

The above-described problem is provided with a sampling member having a proximal end attached to a rotating rod, extending outward in the radial direction of the rotating rod, and circling around the rotating rod by the rotation of the rotating rod,
The sampling member is provided with a sampling chamber extending in the radial direction of the rotating rod and a sampling port extending in the radial direction of the rotating rod. (First invention).

  In this apparatus, the base member is attached to the rotating rod so that the sampling member extends radially outward from the rotating rod and the sampling chamber and the sampling port extend in the radial direction of the rotating rod. Therefore, the improved soil can be collected over a wide range in the radial direction of the columnar ground improvement body, and highly accurate inspection can be realized.

  In the first invention, a lid for opening and closing the sampling port is provided, the lid is opened by receiving the resistance of the surrounding soil by rotating in one direction of the rotating rod, and the resistance of the surrounding soil by rotating in the other direction of the rotating rod. It is good to consist of what was received and closed (2nd invention).

  In this device, the rotating rod is rotated in the direction in which the lid closes and positioned at the depth position where the columnar ground improvement body is desired to be collected, and if the rotating rod is rotated in the opposite direction at that position, the depth position is improved. The soil can be reliably collected over a wide range in the radial direction, and it can be realized by a simple mechanism using the rotation direction of the rotating rod and the resistance of the surrounding soil.

  In the first and second inventions, the sampling member has both ends opened, the inside is a sampling chamber, the peripheral wall is provided with a sampling port, and the plugging material removably attached to both ends of the cylindrical body If the two plugging materials are removed, the sampling soil in the sampling chamber can be pushed out through the other opening through one opening of the cylinder (third invention).

  In this case, the improved soil collected in the sampling chamber of the sampling member can be easily taken out from the same chamber, and the sample taken out is the improved soil on the inner side in the radial direction of the columnar ground improvement body. The other end is an improved soil outside in the radial direction, and one sample can contain a wide range of improved soil in the radial direction, so that the improved soil of the columnar ground improvement body can be inspected efficiently. it can.

In the first, second and third inventions, a fixed hardware for attaching the base end of the sampling member to the rotating rod is provided,
The fixed hardware is detachable from the side of the outer periphery of the rotating rod, is engaged with the outer periphery of the rotating rod in the rotational direction, and rotates integrally with the rotating rod. It is good to consist of what was provided with the attaching part which attaches a part (4th invention).

  In this case, since this device can be attached to and detached from the rotating rod using a fixed hardware, the rotating rod can be used by attaching it to the rotating rod using an existing columnar ground improvement machine construction machine. Sampling of the improved soil can be performed, and efficient sampling can be realized.

  Further, the present invention is characterized in that the columnar ground improved body sampling device according to any one of the first to fourth inventions is attached to a plurality of locations in the length direction of the rotating rod, and improved soils having different depths are collected. Including a columnar ground improvement body sampling method (a fifth invention).

  According to this method, it is possible to collect improved soils at a plurality of different depths by reciprocating the rotating rod up and down once, and to efficiently perform sampling in a wide range in the radial direction and the depth direction. .

  Since the columnar ground improvement body sampling device of the present invention is as described above, the improved soil can be collected over a wide range in the radial direction of the columnar ground improvement body, and a highly accurate inspection is realized. be able to.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  The columnar ground improvement body sampling device 1 according to the embodiment shown in FIGS. 1 to 4 is configured to be detachably attached to the rotary rod 2 for excavation and stirring of the columnar ground improvement body construction machine. A plurality of sampling members 3 and one fixed hardware 4 are included.

  As shown in FIG. 1 and the like, the sampling member 3 can be positioned at the outer periphery of the columnar ground improvement body 5 or in the vicinity thereof with the base end attached to the rotating rod 2. As shown in FIGS. 4 (a), (b) and (e), both ends are opened, the inside is a sampling chamber 6a, and a sampling port 6b extending in the axial direction is provided in the peripheral wall portion. 4 includes a cylindrical body 6, first and second closing materials 7 and 8 that are detachably attached to both ends of the cylindrical body 6, and a lid 9 that opens and closes the sampling port 6 b. As shown in FIG. 2, if both the plugging materials 7 and 8 are removed, the sampling soil in the sampling chamber 6a can be pushed out from the other opening portion through the one opening portion of the cylindrical body 6 without being disturbed. . Further, the first closing material 7 side is a base end side attached to the rotating rod 2, and the first closing material 7 has a male screw portion 7 a for attaching to the fixed hardware 4 coaxially with the cylindrical body 6. Is provided.

  The lid 9 is made of a cross-sectional C-shaped material having a length that can close the sampling port 6b, and can rotate along the inner peripheral surface of the cylindrical body 6 as shown in FIG. And has a rising edge 9a projecting toward the sampling port 6b at one side edge in the circumferential direction. As shown in FIG. 4C, one surface portion sandwiching the rising edge 9a is pushed. The sampling port 6b is closed and, as shown in FIG. 4 (d), the other surface portion is pushed to be opened.

  As shown in FIG. 3 (a), the fixed hardware 4 is formed by connecting two hardware parts 10 and 10 curved in a semicircular arc shape at one end side in the circumferential direction. 3 is opened around the pivot part 11, fitted to the outer periphery of the rotating rod 2 from the side, and the other ends in the circumferential direction of both parts 10, 10 are fastened with bolts 10, so that FIG. As shown, the outer periphery of the rotating rod 2 can be fastened in an integrated state. Reference numeral 13 denotes a non-slip material made of rubber or the like.

  A plurality of female screw parts 10 a... Are attached to the hardware parts 10, 10 of the fixed hardware 4 by screwing the male screw parts 7 a provided on the first closing material 7 of the sampling member 3. It is provided at regular intervals in the circumferential direction so that the direction is directed in the radial direction. As shown in FIG. 3B, each sampling member 3. Each of the sampling members 3 is extended outward in the radial direction of the rotating rod 2 as shown in FIGS. 2A and 2B by screwing the base end male screw portions 7a. The rotation of the rotary rod 2 allows the circumference of the rotary rod 2 to be circulated, and both the sampling chamber 6a and the sampling port 6b are provided extending in the radial direction of the rotary rod 2. . In this attached state, the rising 9a of each sampling member 3 is positioned on the upper side or the lower side. In addition, 2a is the stirring blade for columnar ground improvement body formation with which the rotating rod 2 was equipped.

  Thus, according to the columnar ground improvement body sampling apparatus 1 attached to the outer periphery of the rotating rod 2, as shown in FIG. 1 (a), the rotating rod 2 is covered with the lid 9 of each sampling member 3. Each sample member is inserted into the ground while being rotated in the closing direction by resistance and rotated in the reverse direction at the depth at which sampling is performed, as shown in FIG. The 3 lids 9 are opened, and the improved soil 5 in a wide radial direction constituting the columnar ground improvement body is taken into the internal sampling chamber 6a through the sampling port 6b.

  Thereafter, as shown in FIG. 1 (a), if the rotating rod 2 is rotated in reverse at that depth, the lids 9 of the sampling members 3 are closed by the resistance of the surrounding soil 5 and are lifted to the ground as they are. If so, sampling can be completed.

  Thus, according to the columnar ground improvement body sampling apparatus 1 described above, the improved soil can be collected over a wide range in the radial direction of the columnar ground improvement body, and a highly accurate inspection can be realized. .

  In addition, as shown in FIG. 5, in the insertion process of the injection mixing stirring process for forming the columnar ground improvement body, the insertion process of the re-stirring process, or the insertion process of the sampling process, the outer peripheral portion of the rotating rod 2 By installing the sampling devices 1 at a plurality of locations in the length direction, improved soils having different depths are collected. In this way, it is possible to collect improved soils at a plurality of different depths only by reciprocating the rotating rod 2 up and down once, and to realize a wide range of sampling in the radial direction and the depth direction. And can do it efficiently.

  After the sampling is completed, the sampling members 3... Are removed from the fixed hardware 4 of the sampling device 1 on the ground, both the plugging materials 7 and 8 are removed, as shown in FIG. If the sampling soil in the sampling chamber 6a is pushed out from the other opening through the portion, one end side from the sampling member 3 is improved soil on the inner side in the radial direction of the columnar ground improvement body 5, and the other end side is in the radial direction. The cylindrical sampling soil of the outer improved soil is taken out without disturbance, and the stirring condition can be easily confirmed visually with the sampling soil, and the sampled cylindrical soil can be removed. It is possible to easily compress the cylinder in the axial direction and measure its strength or confirm the state.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above embodiment, the columnar ground improvement body sampling device is configured by the sampling members 3... And the fixed hardware 4. However, the columnar ground improvement body sampling device including the rotating rod 2 as a component is configured. In that case, it may be configured in a columnar ground improvement body sampling device composed of a sampling member, a fixed hardware and a rotating rod, or a columnar shape composed of a sampling member and a rotating rod without the fixed hardware. It is also possible to constitute a ground improvement body sampling device.

  In the above embodiment, the case where the sampling member 3 is provided with the lid 9 for opening and closing the sampling port 6b has been described.

The columnar ground improvement body sampling device of an embodiment is shown, and a figure (I) and a figure (B) are sectional top views showing a sampling method. FIG. 1A is a sectional plan view of the columnar ground improvement body sampling apparatus, and FIG. FIGS. 1A and 1B are partial cross-sectional plan views illustrating a method of attaching the columnar ground improvement body sampling device to the rotating rod. (A) is a front view of the sampling member, (b) is a cross-sectional view taken along the line II in FIG. (A), (c) and (d) are cross-sectional views showing the operating state of the sampling member, (E) is an exploded front view of the sampling member. FIGS. 1A to 1F are front views sequentially showing an example of a sampling method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Columnar ground improvement body sampling apparatus 2 ... Rotating rod 3 ... Sampling member 4 ... Fixed metal 5 ... Columnar ground improvement body 6 ... Cylindrical body 6a ... Sampling chamber 6b ... Sampling port 7, 8 ... Closing material 9 ... Cover

Claims (5)

A sampling member is provided that has a proximal end attached to the rotating rod, extends radially outward of the rotating rod, and circulates around the rotating rod by rotation of the rotating rod;
A columnar ground improvement body sampling apparatus, wherein the sampling member is provided with a sampling chamber extending in the radial direction of the rotating rod and a sampling port extending in the radial direction of the rotating rod.   A lid for opening and closing the sampling port is provided, and the lid is opened by receiving the resistance of the surrounding soil by rotating in one direction of the rotating rod and closed by receiving the resistance of the surrounding soil by rotating in the other direction of the rotating rod. The columnar ground improvement body sampling apparatus of Claim 1 which consists of what was made.   The sampling member is composed of a cylindrical body having both ends opened, a sampling chamber inside, and a sampling port in the peripheral wall portion, and a plugging material attached to the both ends of the cylinder in a removable manner. 3. The columnar ground improvement body sampling apparatus according to claim 1, wherein the sampling soil in the sampling chamber can be pushed out through the other opening through one opening of the cylinder. A fixed hardware for attaching the base end of the sampling member to the rotating rod is provided,
The fixed hardware is detachable from the side of the outer periphery of the rotating rod, is engaged with the outer periphery of the rotating rod in the rotational direction, and rotates integrally with the rotating rod. The columnar ground improvement body sampling apparatus as described in any one of Claims 1 thru | or 3 which consists of what was provided with the attaching part which attaches a part.   A columnar ground improvement body sampling method, wherein the columnar ground improvement body sampling apparatus according to any one of claims 1 to 4 is attached to a plurality of locations in a length direction of a rotating rod, and improved soils having different depths are collected.

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