JP3968735B2 - Rod for collecting soil from pile hole walls - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rod for collecting earth and sand from a pile hole wall for inspecting the soil quality of the excavated pile hole wall when constructing a pile foundation.
[0002]
[Prior art]
Soil inspection at the conventional pile foundation construction position was indispensable in designing pile foundations regardless of whether they were site-constructed piles or ready-made piles. In the past, materials were collected and inspected in advance by drilling in advance at representative locations within the site. In this case, since it is different from the actual pile foundation construction position, it may lack accuracy.
[0003]
Therefore, a method has been attempted in which a bucket for collecting earth and sand is provided above the excavation head of the pile hole excavating rod, and the soil is collected by excavating the wall of the pile hole with the bucket during or after excavation.
[0004]
[Problems to be solved by the invention]
In the method of collecting earth and sand during excavation, the excavation is interrupted every time the earth and sand are collected, and when the earth and sand are collected every depth, such as every 1 m, it is collected. The excavation rod had to be lifted to interrupt the excavation at depth and raise the collected sediment to the ground. In addition, when collecting earth and sand after excavation is completed, there is a similar problem when collecting earth and sand at every predetermined depth.
[0005]
[Means for Solving the Problems]
However, the present invention solves the above-mentioned problems because the base portion of the cylindrical body for storing earth and sand whose tip is open is rotatably attached to the outer peripheral portion of the rod body.
[0006]
That is, this invention constitutes a rod body having a radial support or spiral having an outer peripheral portion that can be inserted into a pile hole and positioned at the vicinity of the pile hole wall, and on the outer peripheral portion of the rod main body, A base portion of a cylindrical body for storing earth and sand having an open end is rotatably attached. The cylindrical body has a distal end opening projecting radially from an edge of the outer peripheral portion of the rod body in the open position, and in the outer peripheral portion in the closed position. A rod for collecting soil and sand from a pile hole wall, characterized in that the tip opening is sealed.
[0007]
In the above, the cylindrical body can have a claw for collecting earth and sand at the tip, and a through hole in the bottom of the cylindrical body, and a disk that closes the through hole in the cylindrical body. Further, the cylindrical body can be formed in an inner shape that can form a test specimen for inspection.
[0008]
Embodiment
The rod body is provided with a spiral having an outer peripheral portion that can be inserted into the pile hole and positioned at the vicinity of the pile hole wall. The cylinder for earth and sand storage with an open end has a claw part for collecting earth and sand at the tip, has a through hole for operation at the bottom, and an inner bottom plate for closing the through hole is inserted in the cylinder. . A base portion of a cylindrical body is rotatably attached to the outer peripheral portion of the rod main body to constitute a soil collecting rod for the hole wall. In the cylindrical body, the tip opening projects radially from the edge of the outer periphery of the rod body at the open position, is accommodated in the outer periphery at the closed position, and the tip opening is sealed by the lid.
[0009]
[Example 1]
An embodiment of the present invention will be described with reference to FIGS.
[0010]
A rod body 5 is configured by surrounding a spiral blade (screw) 3 around the outer periphery 2 of the hollow shaft 1. A cylindrical body 8 for sample storage is disposed on the lower surface 4 of the spiral blade 3 of the rod body 5 at a symmetric diameter, and the bottom surface 9 side of the cylindrical body 8 is fixed by a shaft 7. The cylindrical body 8 is arranged so that the axial direction of the cylindrical body 8 is substantially perpendicular to the diameter direction of the spiral blade 3, and when closed, the cylindrical body 8 is accommodated in the spiral blade 3 in the radial direction and opened. In this state, the cylindrical body 8 is rotatably attached so that the distal end portion protrudes outside the spiral blade 3. In the closed cylinder 8, a lid 15 that can block the opening 11 on the distal end side is attached to the lower surface 4 of the spiral blade 3.
[0011]
The cylinder 8 is provided with a cylinder such as hydraulic pressure or pneumatic pressure (not shown), and can be controlled by a remote operation from the ground.
[0012]
The cylindrical body 8 is provided with a claw 12 that can cut the hole wall on one side of the edge of the tip 10, and the claw 12 is positioned on the peripheral edge 3 a side of the spiral blade 3. In addition, the size of the cylindrical body 8 is, for example, about “diameter 50 mm × length 100 mm”. Further, through holes 13 and 13 for operation are formed in the bottom portion 9 of the cylindrical body 3, the through holes 13 and 13 are closed on the bottom surface of the cylindrical body 3, and loosely fitted in the cylindrical body 8. A disc 14 having a diameter slightly smaller than the inner diameter of the cylinder 8 is inserted so as to be able to do so.
[0013]
As described above, the soil collecting rod 17 of the present invention is constituted.
[0014]
Next, the use of the rod 17 of the present invention will be described.
[0015]
The rod 17 of the present invention is connected to a drill rod (not shown) having a drill head. The pile hole 19 is excavated with the excavation rod as in the prior art. At this time, since the cylinder 8 is attached to the lower surface side of the spiral blade 3, the soil removal performance is not affected. Subsequently, when the predetermined earth and sand collection position is reached, the cylinder 8 is operated by rotating from the ground to rotate and open the cylinder 8 in the direction indicated by arrow 20, and the rod 17 is rotated in the direction indicated by arrow 23. The nail | claw 12 cuts the side wall of the pile hole 19, and the shaved earth and sand are accommodated in the cylinder 8 (FIG.2 (b)). When a predetermined amount of earth and sand has been accommodated, the cylinder 8 is reversely rotated and closed by an operation on the ground (FIG. 2 (a)). If the cylindrical body 8 is closed, the opening 11 at the tip of the cylindrical body 8 is blocked by the lid 15, so that earth and sand leak from the cylindrical body 8, or earth and sand at other positions are lost in the cylindrical body 8. There is no.
[0016]
Moreover, if it comes to other earth and sand collection plan height, the other cylinder 8 will be opened and earth and sand will be collected similarly. Thereafter, the side wall of the pile hole 19 is similarly cut at every height that needs to be collected, and earth and sand are collected. When the predetermined excavation is completed, the soil collecting rod 17 is lifted to the ground together with the excavation rod.
[0017]
Next, if rods 21 and 21 are inserted from through holes 13 and 13 at the bottom of each cylinder of rod 17 for collecting earth and sand (FIG. 4A) and disc 14 is pushed up, disc 14 At the same time, the earth and sand 22 collected in the cylinder 8 can be taken out (FIG. 4B).
[0018]
The taken earth and sand 22 can be used for various tests such as a specific gravity test, a particle size test, a water content ratio test, a unit volume weight test, a liquid property / plastic limit test, a uniaxial compression test, and a triaxial compression test.
[0019]
While the pile hole 19 was excavated, the cylinder 8 was rotated to collect earth and sand. However, after the pile hole 19 was excavated, the cylinder 8 was rotated at a predetermined depth when the excavation rod was pulled up. It can be moved to collect earth and sand. Furthermore, without connecting to the excavation rod, the soil collecting rod 17 supported on the ground can be inserted into the excavated pile hole 19 alone, and the cylinder 8 can be rotated to collect the earth and sand. .
[0020]
In addition, in the above, if the cylinders 8 are attached in advance at every soil collection height (for example, every 2 m) of the spiral blade 3, the rods 17 reach a predetermined depth all at once. If the cylinder 8 is operated, earth and sand at a predetermined depth can be collected by a single operation.
[0021]
In the said Example, if the inner dimension of the cylinder 8 is formed to be the same as the specimen dimensions of each test, the earth and sand 22 collected in the case of clay and the like can be taken out from the cylinder 8 and used as it is (not shown). Absent).
[0022]
Moreover, in the said Example, it protruded at the front-end | tip 10 of the cylinder 8, and the nail | claw 12 was formed, However, If a pile hole wall is shaved and earth and sand can be taken in in the cylinder 8, it can also be set as another structure. For example, a claw can be formed by sharpening the inside or the outside of the tip 10 of the cylindrical body, or a claw can be formed by cutting the tip 10 obliquely with respect to the axial direction (both Not shown).
[0023]
Moreover, in the said Example, the cylinder 8 can also be made removable from the spiral blade 3 (not shown). In this case, the collected earth and sand can be easily taken out.
[0024]
Further, it is also possible to configure the cylindrical body 34 that is attached to the spiral blade 3 by inserting the inner cylinder 31 into the cylindrical body 8 of the embodiment (FIG. 5). In this case, a through hole 32 for operation is formed in the bottom of the inner cylinder 31 so as not to communicate with the through hole 13 of the cylinder (outer cylinder) 8, and the through hole 32 is formed in the inner cylinder 31. A disc 33 that can close the tube is inserted to form a cylindrical body 34 (FIG. 5A). When taking out the collected earth and sand 22 with this cylindrical body 34, the inner cylinder 31 is taken out from the cylindrical body 8 with the rod bodies 21 and 21, the rod body 35 is further inserted, and the earth and sand 22 collected with the disk 34 is removed. Remove (FIG. 5B). To double this, since the inner cylinder 31 is handled and the earth and sand 22 can be taken out at a position different from the rod 17, the earth and sand can be easily collected.
[0025]
[Example 2]
In the first embodiment, the rod body 5 is configured by arranging the spiral blade 3 around the outer periphery 2 of the hollow shaft 1. However, this is an embodiment having a different rod body configuration.
[0026]
On the outer periphery 2 of the hollow shaft 1, support members 24, 24 in the diameter direction of the hollow shaft 1 are provided at predetermined heights. The support tools 24, 24 adjacent to each other in the vertical direction have a 90 degree phase change. The support 24 has an upper plate 25 and a lower plate 26 arranged in parallel, and a gap 27 between the upper plate 24 and the lower plate 26 is provided (FIG. 6A).
[0027]
A cylindrical body 8 similar to that of the first embodiment is inserted into the gap 27 of the support 24, and arranged so that the diameter direction of the hollow shaft 1 and the axis of the cylindrical body 8 are substantially orthogonal (FIG. 6 ( b)). The cylindrical body 8 is fixed to the support 24 by the shaft 7 attached to the bottom portion 9 so as to be rotatable in a substantially horizontal plane (FIG. 6C).
[0028]
The cylinder 8 is accommodated in the support 24 in the closed state (FIG. 6B, broken line 8), and in the open state, the cylinder 8 is rotated so that the opening 11 at the distal end is the support 24. It is attached so that it can protrude from the outer periphery 24a (FIG. 6 (b) chain line illustration 8). Similarly to the first embodiment, a lid 15 that can close the opening 11 of the closed cylinder 8 is attached to the support 24. Further, as in the first embodiment, the cylinder 8 is provided with a cylinder such as hydraulic pressure or pneumatic pressure (not shown), and can be controlled by a remote operation from above.
[0029]
Further, the configuration of the cylindrical body 8 is the same as that of the first embodiment, and a claw 12 capable of cutting a hole wall is continuously provided on the tip side, and through holes 13 and 13 for operation are formed in the bottom portion 9. The disc 14 is inserted into the bottom surface of the cylinder 8 so as to close the through holes 13 and 31 (FIG. 3).
[0030]
As described above, the sediment collecting rod 30 of the present invention is configured (FIG. 6A).
[0031]
The use of the rod 30 for collecting earth and sand is the same as that of the first embodiment. When the rod 30 is connected to the excavating rod or inserted into the pile hole 19 alone and reaches a predetermined sediment collecting position, the cylinder The bodies 8 and 8 are rotated and opened, the claws 12 of the cylinder 8 cut the side wall of the pile hole 19, and the shaved earth and sand are accommodated in the cylinder 8. When a predetermined amount of earth and sand has been accommodated, the cylinder 8 is turned reversely and closed, and the opening 11 of the cylinder 8 is closed with the lid 15.
[0032]
Further, when taking out the collected earth and sand 22 from the cylinder 8, the rod 21 is inserted through the through holes 13 and 13 of the bottom portion 9 of each cylinder 8, the disk 14 is pushed up, The earth and sand collected together with the plate 14 is taken out (FIGS. 4A and 4B).
[0033]
Other configurations of the cylindrical body 8 in the embodiment are the same as those in the first embodiment.
[0034]
【The invention's effect】
In this invention, the rod body is rotatably provided with a cylindrical body, the cylindrical body is accommodated in the outer peripheral portion in the closed position, and the distal end opening projects radially from the edge of the outer peripheral portion of the rod main body in the open position, Since it is accommodated in the outer peripheral portion in the closed position, there is an effect that by inserting the rod into the pile hole, the pile hole wall at a desired depth can be shaved and the earth and sand can be collected. Furthermore, since the cylinder is accommodated in the outer periphery of the rod main body in the closed position, if the rod of the present invention is connected to the excavation rod, it will interfere with the excavation work simultaneously with the pile hole excavation and process. There is an effect that can collect soil and sand. Further, since the tip opening is sealed at the closed position of the cylindrical body, there is an effect that the collected earth and sand are not lost and it is possible to prevent the earth and sand at positions other than the collecting position from being mixed.
[0035]
Further, when the bottom of the cylindrical body has a through hole and a disk that closes the through hole is built in the cylindrical body, there is an effect that the work of taking out the collected earth and sand can be easily performed.
[Brief description of the drawings]
1A is a front view and FIG. 1B is a cross-sectional view of an embodiment of the present invention.
FIGS. 2A and 2B are schematic enlarged bottom views, in which FIG. 2A shows a state in which the cylinder is closed, and FIG. 2B shows a state in which the cylinder is opened.
FIG. 3 is an enlarged perspective view of a cylinder used in the embodiment of the present invention.
4A and 4B are enlarged vertical sectional views of a cylindrical body, where FIG. 4A shows a soiled state, and FIG. 4B shows a state where a sample collected is taken out.
FIGS. 5A and 5B are enlarged vertical sectional views of another cylindrical body example, in which FIG. 5A shows a soiling state, and FIG. 5B shows a state where a sample taken is taken out.
6A is a front view, FIG. 6B is an enlarged cross-sectional view, and FIG. 6C is an enlarged front view of another embodiment of the present invention.
[Explanation of symbols]
1 hollow shaft 3 spiral blade 5 rod body 7 shaft 8 cylinder 9 bottom (cylinder)
11 Opening (cylinder)
12 nails (cylinder)
13 Through hole (cylinder)
14 disc (cylinder)
15 Lid 17 Rod 19 Pile hole 22 Sediment 24 Support tool 30 Rod 31 Inner cylinder 32 Through hole 33 Disk 34 Cylindrical body

Claims (3)

  A rod body provided with a radial support or a spiral having an outer peripheral portion that can be inserted into a pile hole and positioned at the vicinity of the pile hole wall, and the earth and sand having an open end at the outer peripheral portion of the rod main body A base of a cylinder for storage is rotatably attached, and the cylindrical body has a distal end opening projecting radially from an edge of the outer periphery of the rod body in an open position, and is accommodated in the outer periphery in a closed position, A rod for collecting soil and sand from a pile hole wall, characterized in that the tip opening is sealed off.   The cylindrical body has a claw portion for collecting earth and sand at the tip, and has a through hole at the bottom of the cylindrical body, and a disk that closes the through hole is provided inside the cylindrical body. The rod for collecting earth and sand from the pile hole wall according to 1.   The rod for collecting soil and sand from a pile hole wall according to claim 1, wherein the cylindrical body is formed in an inner shape capable of forming a test specimen for inspection.

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