JP4881929B2 - Soil cement sampling tool - Google Patents

Description

  The present invention excavates soft ground, injects cement milk into the excavated soil, mixes and agitates the cement milk and excavated soil, and forms a soil cement pile in the ground. It is related with the soil cement sample collection tool used to collect the sample in a paste state before the soil cement solidifies in order to check whether or not the materials are properly mixed and stirred.

  As a conventional soil cement sample collection tool, publicly known documents such as patent publications cannot be specifically mentioned, but conventionally, for example, a sample collection can is stored and held in a holder, and this holder is used for excavating soil and cement milk. Drilling and agitating the soil cement building device for mixing and stirring and fixing it to the tip of the stirring rod, this rod is lowered while rotating to mix and stir the excavated soil and cement milk in the borehole, When the rod is pulled up after being lowered to the sample collecting position at the lower end of the pit, the mixed soil cement sample is collected in a sample collecting can and the sample collecting can is taken out by lifting the rod.

  In the conventional soil cement sample collection tool as described above, the sample collection can attached and fixed to the tip of the excavation and stirring rod is still sufficiently mixed until it reaches the sample collection position at the lower end of the excavation hole. There is a problem that it is difficult for the sample collection can to reliably collect a sample of the soil cement at a predetermined collection position at the lower end of the digging hole, such as accepting a soil cement that has not been used.

  In view of the above circumstances, an object of the present invention is to provide a soil cement sample collection tool capable of reliably collecting a soil cement sample at a predetermined collection position at the lower end of a digging hole.

  Means for solving the above problems will be described with reference numerals of the embodiments described later. The invention according to claim 1 includes a window opening 8 in the peripheral wall portion 7, and excavated soil and cement milk. The outer cylinder 2 attached to the tip of the excavating and agitating rod 6 for mixing and stirring, and the inner cylinder 2 is rotatably fitted in the outer cylinder 2 and has a window opening 13a in the peripheral wall portion 12. A soil cement sample collecting tool comprising a cylindrical body 3 and upper and lower wall bodies 4, 5 attached to the inner cylindrical body 3 so that the inner cylindrical body 3 can be rotated in the outer cylindrical body 2. 1. The inner cylinder body 3 is formed by projecting the inner cylinder rotating operation pieces 16 and 17 on the upper and lower wall bodies 4 and 5 and rotating the operation pieces 16 and 17 in the same direction. Rotate to cover and close the window opening 13a of the inner cylinder 3 with the peripheral wall 7 of the outer cylinder 2 Stoppers 11a and 11a for stopping the operation pieces 16 and 17 in the closed position are respectively provided on the outer cylinder 2 so as to rotate the operation pieces 16 and 17 in a direction opposite to the direction. Accordingly, the window opening 13a of the inner cylinder 3 and the window opening 8 of the outer cylinder 2 are made to coincide with each other to open the window opening 13a of the inner cylinder 3, and the stoppers 11b for stopping the operation pieces 16 and 17 at the opened position. 11b further projectingly from the outer cylinder 2, and the inner cylinder rotating operation pieces 16, 17 receive soil resistance while the window opening 13a of the inner cylinder 3 is closed. Drilling while rotating the excavation and stirring rod 6 in the direction in which the window opening 13a of the body 3 is closed, and when excavating to the sampling position, the rod 6 is reversed and the window opening 13a of the inner cylinder 3 is opened to collect a sample. After the collection, the rod 6 is It is characterized in that the window aperture 13a of the rotated closing direction so pulled up.

  A second aspect of the present invention is the soil cement sample collecting tool according to the first aspect, wherein the peripheral wall portion 7 of the outer cylindrical body 2 is provided with an air vent hole 9 at a position facing the window opening 8.

  According to a third aspect of the present invention, in the soil cement sample collecting tool according to the first or second aspect, each of the peripheral wall portions 12 of the inner cylindrical body 3 has a window opening at a position symmetrical with respect to the central axis of the inner cylindrical body 3. 13a and 13b are provided.

  A fourth aspect of the present invention is the soil cement sample collecting tool according to any one of the first to third aspects, wherein the upper and lower wall bodies 4 and 5 are configured to be detachable from the inner cylindrical body 3.

  The effect of the invention by the above solution will be described with reference numerals of the embodiments described later. According to the invention according to claim 1, the outer cylindrical body 2 is used as the tip of the excavating and stirring rod 6 in use. In the state where the window opening 13a of the inner cylinder 3 is closed, each inner cylinder rotating operation piece 16, 17 receives soil resistance and rotates the rod 6 in the direction in which the window opening 13a of the inner cylinder 3 is closed. If the inside of the soil cement mixed with the excavated soil and the cement milk is lowered to the sample collection position, the window opening 13a of the inner cylinder 3 remains closed during the lowering, and the rod 6 reaches the predetermined depth. The sample can be collected by opening the window opening 13a of the inner cylinder 3 by reversing the rod 6 at the lowered collection position. Thus, after the sample is collected, if the rod 6 is rotated in a direction in which the window opening 13a of the inner cylinder 3 is closed and the window opening 13a of the inner cylinder 3 is closed, the rod 6 is lifted up at a predetermined sampling position. Since only soil cement samples can be collected, the mixed state of excavated soil and cement milk can be accurately grasped.

  Moreover, if the air vent hole 9 is provided in the peripheral wall portion 7 of the outer cylindrical body 2 as in the invention according to claim 2, the air in the inner cylindrical body 3 can be discharged to the outside, and a sample of the soil cement is obtained. It becomes easy to take in the inner cylinder 3.

  Further, as in the invention according to claim 3, the window openings 13a and 13b are provided in the circumferential wall portion 12 of the inner cylinder 3 at positions that are line-symmetric with respect to the central axis of the inner cylinder 3, respectively. When the sample of the soil cement is taken out from the inner cylinder 3 after taking the sample, the sample becomes easy to take out.

  Further, as in the invention according to claim 4, the upper and lower wall bodies 4, 5 are configured to be detachable from the inner cylinder body 3, so that the inner cylinder body 3 can be easily assembled and removed from the outer cylinder body 2. .

  A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a use state of a soil cement sample collecting tool 1 according to the present invention, and a window opening 13a of an inner cylinder 3 is closed. 2A is a plan view, and FIG. 2B is a cross-sectional view taken along the line XX of FIG. 3 is a front view showing a state in which the window openings 13a and 13b of the inner cylinder 3 are open, FIG. 4 (a) is a plan view, and FIG. 4 (b) is a cross-sectional view taken along line YY in FIG. This soil cement sample collecting tool 1 has an outer cylindrical body 2 having a window opening 8 in the peripheral wall portion 7 and window openings 13a and 13b in the peripheral wall portion 12, and is rotatably fitted in the outer cylindrical body 2. The inner cylinder 3 and the inner cylinder 3 are restricted from being detached from the outer cylinder 2 up and down, while being detachably attached to the inner cylinder 3 by bolting so as to be rotatable within the outer cylinder 2. The upper and lower wall bodies 4 and 5 are configured to be detachably attached to the distal end portion of the excavating and agitating rod 6 for mixing and agitating excavated soil and cement milk in use. It is.

  The structure of the soil cement sample collecting tool 1 and the mounting brackets 20 and 20 that are detachably attached when the soil cement sample collecting tool 1 is used will be described in more detail. FIG. (B) is a top view, FIG.6 (a) is a front view of the inner cylinder 3, (b) is a top view, FIG.7 (a) is a front view of the upper wall body 4, (b) is a plane. FIG. 8A is a front view of a gripping arm 21 that is a part of the mounting bracket 20 including a pair of gripping arms 21 and 22, and FIG. 8B is a plan view. FIG. 9 is an exploded perspective view of the soil cement sample collecting tool 1 and the mounting brackets 20 and 20.

  Referring to these drawings, as can be seen from FIGS. 5 and 9, the outer cylindrical body 2 is provided with a vertically long rectangular window opening 8 on the front side of the short cylindrical peripheral wall portion 7, and on the right side of the window opening 8. Three flanges 10, 10, 10 are provided at equal intervals in the axial direction of the peripheral wall portion 7 slightly to the right of the end portion. Then, stoppers 11 a and 11 a made up of short rectangular columns in the vertical direction along the left end and corner of the window opening 8 are fixed to the peripheral wall portion 7 by welding W, and are further short with respect to the central axis of the peripheral wall portion 7. The stoppers 11b and 11b made of short square pillars are fixed to the peripheral wall portion 7 by welding W in the vertical direction at positions symmetrical to the stoppers 11a and 11a made of square pillars. The peripheral wall 7 is provided with a circular air vent hole 9 at a position facing the window opening 8 so that a soil cement sample can be easily taken into the inner cylinder 3. The flange 10 is provided with bolt insertion holes 10a and 10a for inserting the bolts 10b and 10b.

  As can be seen from FIGS. 6 and 9, the inner cylindrical body 3 includes a short cylindrical peripheral wall portion 12 that is rotatably fitted in the outer cylindrical body 2, and a peripheral wall is provided on the upper and lower surfaces of the peripheral wall portion 12. Upper and lower surface projecting portions 14 and 15 formed by circular thick plates narrower than the circumference of the portion 12 are formed. Further, the peripheral wall portion 12 is provided with a vertically-long rectangular window opening 13a on the front side, and another window opening 13b is provided at a position that is line-symmetric with respect to the central axis of the window opening 13a and the inner cylinder 3. Is provided. Further, the upper surface protruding portion 14 is provided with a hole 14b at the center, and screw grooves 14a, 14a, 14a corresponding to the bolts 4b, 4b, 4b are provided at equal intervals in the circumferential direction. Since the lower surface projecting portion 15 is formed in the same configuration as the upper surface projecting portion 14, the description thereof is omitted.

  As can be seen from FIGS. 7 and 9, the upper wall body 4 is formed of a circular thick plate, and is provided with bolt insertion holes 4 a, 4 a, 4 a through which the bolts 4 b, 4 b, 4 b are inserted at equal intervals in the circumferential direction. Yes. And the inner cylinder rotation operation piece 16 which consists of a rectangular thick board piece is integrally protrudingly provided by welding etc. in the approximate center position between the bolt insertion holes 4a and 4a located in the upper surface of the upper wall body 4. FIG. The lower wall body 5 has the same configuration as that of the upper wall body 4, and the inner cylinder rotation operation piece 17 formed of a rectangular thick plate piece on the lower surface of the lower wall body 5 is flush with the rotation operation piece 16. Projected integrally on the area.

  As can be seen from FIGS. 8 and 9, the mounting bracket 20 is composed of a pair of arc-shaped gripping arms 21 and 22, and bolts 10 b and 10 b are attached to one end portions of the pair of arc-shaped gripping arms 21 and 22. Cylindrical bolt insertion holes 21a and 22a for insertion are fixed, and bolt insertion holes 21b and 22b for locking the mounting bracket 20 to the rod 6 are provided at the other end portions.

  In order to assemble the soil cement sample collecting tool 1 composed of the components as described above, the inner cylindrical body 3 is fitted into the peripheral wall portion 7 of the outer cylindrical body 2 and provided on the upper surface of the peripheral wall portion 12 of the inner cylindrical body 3. The upper wall body 4 is formed on the upper surface projecting portion 14, and bolts are inserted using bolt insertion holes 4 a, 4 a, 4 a provided on the upper wall body 4 and screw grooves 14 a, 14 a, 14 a provided on the upper surface projecting portion 14. Fasten with 4b, 4b, 4b. Further, the assembly is completed by fastening the lower wall body 5 with the bolts 5b, 5b, 5b to the lower surface projecting portion 15 provided on the lower surface of the peripheral wall portion 12 of the inner cylindrical body 3.

  As shown in FIG. 4, the soil cement sample collecting tool 1 assembled in this way has the outer cylinder body 2 when the inner cylinder rotating operation pieces 16 and 17 are positioned on the one stoppers 11 a and 11 a side. The window opening 8 of the inner cylinder 3 and the window opening 13a of the inner cylinder 3 coincide with each other, the window opening 13a opens, and the window opening 13b and the air vent hole 9 coincide with each other. If the window opening 13b and the air vent hole 9 coincide with each other in this way, the air in the cylindrical body 3 can be easily discharged to the outside through the air vent hole 9, and the soil cement sample can be easily taken into the inner cylindrical body 3. .

  Then, when the inner cylinder rotating operation pieces 16 and 17 are grasped and rotated toward the other stoppers 11b and 11b as shown in FIG. 2, the inner cylinder 3 is rotated accordingly, and the inner cylinder is rotated. The window openings 13 a and 13 b of the body 3 are covered and closed by the peripheral wall portion of the outer cylindrical body 2.

  Thus, the soil cement sample collecting tool 1 having a structure capable of opening and closing the window openings 13a and 13b of the inner cylinder 3 is locked to the excavation and stirring rod 6 by the mounting brackets 20 and 20. The movement of the soil cement sample collecting tool 1 when the rod 6 is rotated in the excavated soil in the excavated hole is described below. In order to lock the soil cement sample collecting tool 1 to the excavating and stirring rod 6 with the mounting brackets 20, 20, the mounting bracket 20, 20 is attached to the soil cement sample collecting tool 1, and then the mounting bracket is attached to the rod 6. What is necessary is just to latch 20,20. Specifically, the bolt insertion holes 21a and 22a of the mounting brackets 20 and 20 are respectively inserted between the flanges 10 and 10 of the soil cement sample collecting tool 1 and fastened by using bolts 10b and 10b and nuts 10c and 10c. Then, the mounting brackets 20 and 20 can be mounted on the soil cement sample collecting tool 1. Then, after the attachment, as shown in FIG. 2, the both gripping arms 21 and 22 are closed to the required positions of the rod 6 from the open posture, and the bolt insertion holes 21 b and 22 b at the other end of the both gripping arms 21 and 22. When the two are fastened with bolts and nuts (not shown), the mounting brackets 20 and 20 can be locked to the rod 6.

  As shown in FIGS. 1 and 2, the movement of the soil cement sample collecting tool 1 in the excavated soil starts from the state in which the window openings 13a and 13b of the inner cylinder 3 are closed, and moves the rod 6 to the arrow A in the excavated soil. When rotating in the direction, that is, counterclockwise, the outer cylinder 2 of the soil cement sample collecting tool 1 pivots in the direction of arrow A about the rod 6. However, since the inner cylinder rotating operation pieces 16 and 17 receive the resistance of excavated soil, the inner cylinder 3 rotates relative to the outer cylinder 2 so that the window openings 13a and 13b of the inner cylinder 3 are opened. It is possible to dig up to the sample collection position while maintaining the closed state. When the rod 6 is rotated clockwise as indicated by the arrow B from the closed state of the window openings 13a and 13b of the inner cylinder 3 shown in FIGS. 1 and 2, the inner cylinder rotating operation pieces 16 and 17 are Since the stoppers 11a and 11a are stopped, the window openings 13a and 13b are opened.

  A method for collecting soil cement by the soil cement sample collecting tool 1 that moves as described above will be described with reference to FIGS. 10 and 11, reference numeral 30 denotes an auger device, and the excavation and stirring rod 6 is suspendedly connected to the lower end portion thereof. Reference numeral 31 denotes an excavating blade provided at the tip of the rod 6, reference numeral 32 denotes an agitating blade provided above the excavating blade 31, and the soil cement sample collecting tool 1 includes an excavating blade 31 and an agitating blade 32 as illustrated. It is attached at a position near the excavation blade 31 in between.

  First, as shown in FIG. 10A, after excavating a predetermined portion of the ground to a predetermined depth by the excavating and stirring rod 6 suspended from the auger device 30 and lifting the rod 6, A soil cement sample collecting tool 1 is attached to the tip. And in the state which closed the window openings 13a and 13b of the inner cylinder 3, the inner cylinder rotation operation pieces 16 and 17 receive resistance of excavated soil, and close the window openings 13a and 13b of the inner cylinder 3 (FIG. As shown in FIG. 10 (b), the excavated soil and cement are rotated while rotating the excavating and stirring rod 6 in the direction of arrow A in FIG. 2 (a) and in the direction of arrow a in FIG. 10 (b), ie, counterclockwise. The inside of the soil cement in which the milk is stirred and mixed, that is, the inside of the borehole 33 is moved down to the sample collection position.

  When the excavation and stirring rod 6 is lowered to the sampling position of a predetermined depth as shown in FIG. 10 (c), the excavation and stirring rod 6 is temporarily reversed (as shown in FIG. 11 (a)). 4 (a), the arrow B direction of FIG. 11 (a), that is, the clockwise rotation), the window openings 13a and 13b of the inner cylinder 3 are opened, and the excavated soil and cement milk are opened. A sample of soil cement with and mixed with is taken. That is, the sample is taken into the inner cylinder 3 from the window opening 13 a of the inner cylinder 3.

  After the sample is collected in this way, the excavation and stirring rod 6 is again connected to the window opening of the inner cylinder 3 when the inner cylinder rotating operation pieces 16 and 17 receive the resistance of the excavated soil, as shown in FIG. The rod 6 is pulled up while rotating in the direction of closing 13a (the direction of arrow A in FIG. 2 (a), the direction of arrow a in FIG. 11 (b), that is, the counterclockwise direction), and as shown in FIG. If pulled up to the ground, the rotation of the rod 6 is stopped. And the soil cement taken in in the inner cylinder 3 is taken out from the window opening 13a of the inner cylinder 3 using instruments, such as a scoop, before solidifying. Further, after removing the bolts 4b, 4b, 4b and the bolts 5b, 5b, 5b and taking out the inner cylinder 3 from the outer cylinder 2, the soil cement is removed from the window openings 13a, 13b of the inner cylinder 3 by a scoop or the like. It can also be removed using an instrument. Although only one window opening 13a, 13b may be provided, it is easier to take out the soil cement in the inner cylinder 3 if two windows are provided, and further, the air in the cylinder 3 can be removed from the air vent hole 9. It becomes easy to discharge outside.

  According to the soil cement sample collecting tool 1 described above, according to the embodiment of the present invention described above, the outer cylindrical body 2 is required to be in front of the excavating blade 30 at the tip of the excavating and stirring rod 6 in use. With the mounting brackets 20 and 20 attached at the positions, the inner cylinder rotating operation pieces 16 and 17 receive soil resistance in a state in which the window opening 13a of the inner cylinder 3 is closed, so that the window opening 13a of the inner cylinder 3 is When the rod 6 is rotated in the closing direction, if it is lowered into the soil cement in which the excavated soil and the cement milk are agitated and mixed, that is, into the borehole 33, the window opening 13a of the inner cylinder 3 is lowered. Is still closed, so that the soil cement does not enter the inner cylinder 3 during the lowering. Thus, by reversing the rod 6 at the sampling position where the rod 6 is lowered to a predetermined depth, the window opening 13a of the inner cylinder 3 can be opened and the sample can be collected. If the rod 6 is pulled up while the window opening 13a is rotated in the closing direction and the window opening 13a of the inner cylinder 3 is closed, the soil cement sample can be collected only at a predetermined collection position. Therefore, it is possible to accurately grasp the mixed state of the excavated soil and the cement milk.

  Further, if the air vent hole 9 is provided in the peripheral wall portion 7 of the outer cylindrical body 2, the air in the inner cylindrical body 3 can be discharged to the outside, and the soil cement sample can be easily taken into the inner cylindrical body 3.

  Further, since the window openings 13a and 13b are respectively provided in the peripheral wall portion 12 of the inner cylinder 3 at positions that are line-symmetric with respect to the central axis of the inner cylinder 3, When the soil cement sample is taken out from the sample, it becomes easier to take out the sample.

  Further, by configuring the upper and lower wall bodies 4 and 5 to be detachable from the inner cylinder body 3, the assembly and removal of the inner cylinder body 3 from the outer cylinder body 2 is facilitated.

It is a front view which shows the use condition of the soil cement sample collection tool which concerns on this invention, and is a figure which shows the state in which the window opening of the inner cylinder is closed. (A) is a top view of FIG. 1, (b) is the XX sectional drawing of FIG. It is a front view in the state where the window opening of the inner cylinder opened. (A) is a top view of FIG. 3, (b) is the YY sectional view taken on the line of FIG. (A) is a front view of an outer cylinder, (b) is a top view. (A) is a front view of an inner cylinder body, (b) is a top view. (A) is a front view of an upper wall body, (b) is a top view. (A) is a front view of a gripping arm which is a part of the mounting bracket, and (b) is a plan view. It is a disassembled perspective view of a soil cement sample collection tool and a mounting bracket. (A)-(c) is explanatory drawing explaining the first half of the collection method of the soil cement by the soil cement sample collection tool. (A)-(c) is explanatory drawing explaining the second half of the sampling method of the soil cement same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Soil cement sample collection tool 2 Outer cylinder body 3 Inner cylinder body 4 Upper wall body 5 Lower wall body 6 Excavation and stirring rod 7 Peripheral wall part 8 of outer cylinder body Window opening 9 of outer cylinder body Air vent holes 11a and 11b Stopper 12 Inner cylinder peripheral wall portions 13a, 13b Inner cylinder window openings 16, 17 Inner cylinder rotation operation piece

Claims (4)

An outer cylinder attached to the tip of the excavation and stirring rod for mixing and stirring the excavated soil and cement milk, with a window opening in the peripheral wall portion;
An inner cylinder that is rotatably fitted in the outer cylinder and has a window opening in the peripheral wall,
A soil cement sample collecting tool composed of upper and lower wall bodies attached to the inner cylinder so that the inner cylinder can rotate in the outer cylinder,
An inner cylinder rotating operation piece is provided on each of the upper and lower wall bodies, and each of the operation pieces is rotated in the same direction to rotate the inner cylinder body so that the window opening of the inner cylinder body is a peripheral wall of the outer cylinder body. The outer cylinder body is provided with a stopper that covers and closes the operation piece and stops each operation piece at the closed position, and each operation piece is rotated in a direction opposite to the direction, thereby the inner cylinder. The window opening of the body and the window opening of the outer cylinder are matched to open the window opening of the inner cylinder, and a stopper for stopping each operation piece at the opened position is further provided on the outer cylinder. In the state that the window opening of the inner cylinder is closed, each inner cylinder rotating operation piece receives soil resistance and is excavated while rotating the excavation and stirring rod in the direction to close the window opening of the inner cylinder, and the sampling position Once the dig is reached, reverse the rod to open the inner cylinder window opening and collect the sample After harvesting soil cement sampling tool to allow pulling by rotating the window opening closing direction of the inner cylinder of the rod.   The soil cement sample collecting tool according to claim 1, wherein an air vent hole is provided in a position facing the window opening in the peripheral wall portion of the outer cylindrical body.   The soil cement sample collecting tool according to claim 1 or 2, wherein a window opening is provided in a position that is line-symmetric with respect to the central axis of the inner cylinder in the peripheral wall portion of the inner cylinder.   The soil cement sample collecting tool according to any one of claims 1 to 3, wherein the upper and lower wall bodies are configured to be detachable from the inner cylindrical body.

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