JP2014055463A - Collecting device for sample in soil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a collecting device for a sample in soil, capable of collecting a sample not only at a tip of an earth auger but also at an intermediate position of a drilling rod.SOLUTION: A collecting device for a sample in soil is provided on an earth auger 35, and has couplings each fitted to an auger screw coupling 33 and rotating integrally with an auger screw 33 in a vertical direction. The coupling in a lower direction is configured to be also a coupling to a drilling head or an enlarging head 1; in a configuration with an outer pipe and an inner pipe, a window hole for collecting the sample in soil is formed in an outer peripheral face of one end of the inner pipe and a cover body is provided in a side bottom part of the other end of the inner pipe.

Description

  The present invention provides an earth auger that is provided on an earth auger and is used for collecting an uncured soil sample immediately after filling with a fixative at a point in the ground (position to be collected) at a pinpoint. It relates to a sampling device.

  When excavating with an earth auger and filling a fixing liquid such as cement milk from the tip of the earth auger to create a pile, a part of the original soil and the fixing liquid are agitated and mixed to satisfy the required strength for strength development. It must be clear whether or not.

The following patent document is a soil sampling method proposed as a method that can easily and reliably collect a pinpoint soil sample at a planned depth regardless of the soil quality.
JP 2003-321829 A

  The soil sample collection device used for collection includes an auger screw 52 connected to the lower end of the rotating rod 51, and a soil collection tool 53 connected to the tip of the auger shaft. As shown in FIG. A drilling tool attachment 58 is attached to the drilling tool, and the auger screw 52 is rotated by a hydraulic motor attached to the crane boom to drill a hole to a planned depth for collecting soil. A spiral blade 54 having an outer diameter smaller than that of the auger screw 52 is provided at the upper end of the shaft around the shaft, and is slightly larger than the outer diameter of the spiral blade 54 and substantially equal to the spiral blade of the auger screw 52. A soil collecting tool 53 formed by fixing a metal disk 56 having an outer diameter of Put.

  The soil sampling tool 53 is lowered into the drilling hole while rotating together with the auger screw 52, and the soil sampling tool 53 is inserted into the ground below the bottom surface of the drilling hole until the disk 56 contacts the bottom surface of the drilling hole. In this state, the auger screw 52 and the soil collecting tool 53 are pulled up to the ground while rotating in reverse.

In addition, the following patent document is provided on the expansion head connected to the lower end of the earth auger, and an unhardened soil sample immediately after filling the rooting liquid into the expansion rooting bulb in the pile construction, This was proposed as a pinpoint sampling at the original position (position to be collected).
JP 2006-241828 A JP 2011-106137 A

  Both of these Patent Documents 2 and 3 rotate integrally with the auger screw, and when the openable openable wing provided at the lower end portion of the auger screw is opened, the earth collection port is opened. When the blade is closed, the earth collection port is opened. Is to be closed.

  In Patent Document 1 and Patent Documents 2 and 3, a sample in the soil can be collected only at the tip of the earth auger. That is, although it is suitable for grasping the injection state of the root-setting liquid used for the expansion root-setting bulb from the expansion head equipped with the openable / closable expansion wing, the pile circumference fixing liquid cannot be collected.

  An object of the present invention is to provide a soil sample collecting device that eliminates the above inconvenience and makes it possible to collect a soil sample not only at the tip of an earth auger but also at an intermediate position of an excavation lot.

  In order to achieve the above object, according to the first aspect of the present invention, firstly, a joint that is provided on the earth auger and rotates integrally with the auger screw is provided in the vertical direction. The lower joint is also a joint to the excavation head, and secondly, it consists of an outer pipe and an inner pipe housed inside the outer pipe. A window hole is formed for collecting the sample, and a lid is provided at the bottom on the other end side of the inner tube so that the collected soil sample can be taken out. The gist of the invention is that the hydraulic cylinder mechanism for moving the inner tube in and out of the outer tube so as to project and retract the window hole is juxtaposed side by side and made flat as a whole.

  According to the first aspect of the present invention, since the joint to be fitted to the auger screw joint is provided in the vertical direction, the joint for connecting the auger screw, for example, the earth sample in the ground auger intermediate portion of the connection between the auger screws. Therefore, it is possible to collect a sample in the soil not only at the tip of the earth auger but also at an arbitrary position.

  According to the second aspect of the present invention, the inner pipe of the sampling device using the outer pipe and the inner pipe is caused to emerge from the outer pipe in conjunction with the extension of the hydraulic cylinder mechanism, and the soil sample is put into the inner pipe from the window hole. After that, the hydraulic cylinder mechanism is reduced and the inner pipe is accommodated in the outer pipe, whereby the taken-in soil sample is pulled up to the ground while being held in the inner pipe, and is placed on the bottom on the end side of the inner pipe. The soil cover in the inner pipe can be collected by removing the provided lid.

  In particular, the sampling device has a flat structure with the hydraulic cylinder mechanisms arranged side by side in parallel. It will never be.

  As described above, the soil sample collecting apparatus according to the present invention can collect the soil sample not only at the tip of the earth auger but also at an intermediate position of the excavation lot.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an embodiment of a soil sample collecting device according to the present invention. FIG. 2 is a front view of a ground auger provided at the tip, and FIG. 2 is a front view of a ground auger provided at an intermediate portion. In the figure, reference numeral 35 denotes an earth auger comprising the driving device 2, an auger screw 33 and an excavation head 34.

  Although not shown, the earth auger 35 supports the mast vertically at the front end of the base machine, and supports the drive device 32 having a motor and a speed reducer on the mast so as to be movable up and down. The auger screw 33 is connected to the output shaft of the driving device via a joint.

  The drive device 32 and the auger screw 33, the auger screws 33, the auger screw 33 and the excavation head 34 are connected by joints, respectively. However, as disclosed in Japanese Patent Application Laid-Open No. 2006-262706, The male and female joints have a female joint made of a square hole socket in which the plug can be freely fitted and detached, and are provided with pin holes penetrating in the transverse direction in the male and female joints. Conventionally, as a shaft joint used for this, a hexagonal shaft male joint is inserted into a hexagonal hole female joint, and then a retaining pin is inserted into a hole that extends through the joint surface between the hexagonal shaft and the hexagonal hole. Are widely used.

  The male joint of the hexagonal shaft is fitted into the female joint of the hexagonal hole, and then a retaining pin is inserted into the hole penetrating the joint surface between the hexagonal shaft and the hexagonal hole.

  As shown in FIG. 7, the male joint 41 has circular shaft portions 43 and 44 connected to the front and rear ends of the hexagonal shaft 42, respectively, and the female joint 45 has a front end opening to be fitted with the hexagonal shaft 42 of the male joint. A hexagonal hole 46, a circular hole portion 47 to be fitted with the circular shaft portion 43 at the front end of the male joint is connected to the rear end of the hexagonal hole 46, and the male end is connected to the front end of the hexagonal hole 46. A circular hole 48 to be fitted to the circular shaft portion 44 at the rear end of the joint is provided continuously.

  In the figure, reference numeral 49 denotes a semi-circular hole of a retaining pin hole that passes through the joint surface of the hexagonal shaft 42 and the hexagonal hole 46 when the male and female joints 41 and 45 are fitted.

  In the figure, reference numeral 10 denotes a soil sample collecting device according to the present invention, and a collecting portion 10a accommodates an inner tube 12 (hereinafter simply referred to as an inner tube) as a collecting pipe having a window hole 12a inside an outer tube 11. It has a heavy tube structure (not only a circular tube but also a square tube).

  The window hole 12a is not provided with a valve, and as shown in FIG. 3, the peripheral wall of the inner tube 12 is divided into four parts with respect to the axial center of the inner tube 12, and the upper one is cut by an arc of about 90 °. It is an upward opening formed by lacking. By forming the window hole 12a in this way, the inner tube 12 of the sampling device 10 also rotates when the enlargement head 1 is rotated, and the soil sample is taken into the inner tube 12 from the window hole 12a, and , Is held inside as it is.

  The soil sample collection device 10 is flattened by arranging the collection portion 10a composed of the outer tube 11 and the inner tube 12 and the hydraulic cylinder mechanism 27 composed of the cylinder 27a and the rod 27b side by side in parallel by the mounting plate 8. .

  The distal end portion of the inner pipe 12 is connected to the distal end portion of the rod 27 b of the hydraulic cylinder mechanism 27 via the connecting arm 13. One end of the connecting arm 13 is rigidly connected to the rod 27 b of the hydraulic cylinder mechanism 27, and the other end is pivotally attached to the distal end portion of the inner tube 12 by a pin 36, and the movement of the rod 27 b of the hydraulic cylinder mechanism 27 is controlled by the connecting arm 13. Is transmitted to the inner tube 12 in a cantilever manner.

  The end on the opposite side of the inner tube 12 of the sampling device 10 is an outlet for collecting the sample in the soil, and the lid 14 is located here.

  As shown in FIGS. 3 to 5, the soil sample collection device 10 is fitted to a male joint 41 and a female joint 45, which are auger screw joints, provided on the earth auger 35 and rotating integrally with the auger screw 33. Joints to be joined were provided in the vertical direction.

  The joints are a female joint 45 and a male joint 41 as well as a male joint 41 and a female joint 45 which are auger screw joints. In the illustrated example, the female joint 45 is directed downward from the lower surface of the soil sample collection device 10. The male joint 41 is projected downward from the upper surface of the soil sample collecting device 10.

  The male joint 41 has circular shaft portions 43 and 44 connected to both front and rear ends of the hexagonal shaft 42, and the female joint 45 has a hexagonal hole 46 with a front end opening to be fitted with the hexagonal shaft 42 of the male joint. A circular hole 47 to be fitted with the circular shaft portion 43 at the front end of the male joint is connected to the rear end of the hexagonal hole 46, and a circular shaft at the rear end of the male joint is connected to the front end of the hexagonal hole 46. A circular hole 48 to be fitted with the portion 44 is provided continuously.

  In the figure, reference numeral 49 denotes a semi-circular hole of a retaining pin hole that passes through the joint surface of the hexagonal shaft 42 and the hexagonal hole 46 when the male and female joints 41 and 45 are fitted. Reference numeral 50 denotes a hydraulic coupler.

  The female joint 45 is also a joint to the excavation head 34 and the expansion head 1 and is fitted to the male joint 7 described later.

  Although the excavation head 34 is a normal one, the enlargement head 1 is attached to the tip of the earth auger 35 as shown in FIG. 1, and has a diameter-expanded blade 22 that expands and contracts as shown in FIG.

  The expansion head 1 has a drilling blade 4 provided with a plurality of tip bits 4a at the lower end, and a spiral blade 5 for pushing up the drilling earth and sand is provided above it, and further on the shaft part 2 above it is opposite to each other. A pair of agitating diameter-expanding blades 22 that can be expanded and contracted are provided.

  A male joint 7 is formed at the upper end of the expansion head 1 so that it can be connected to the auger screw 33 of the earth auger 35. Further, the shaft portion 2 is provided with a pipe 30 connected to the pipe of the auger screw 33 so that the drilling fluid and the rooting fluid can be discharged from the discharge port 31 at the lower end portion.

  The diameter-expanded blade 22 is formed on the outer cylinder 20 by forming the shaft portion 2 on the outer cylinder 20 and the piston 21 sliding inside the outer cylinder 20 as a cylinder. The diameter expansion blade 22 is provided with a bit 22b on an expansion arm 22a, and forms a cam portion 22c at the root.

  The cam portion 22c is pivotally supported on the mounting bracket 23 of the outer cylinder 20, while an engagement recess 24 into which the engagement protrusion of the cam portion 22c is fitted is formed on the outer periphery of the piston 21.

  Thus, according to the vertical movement of the piston 21, the cam portion 22 c rotates and the diameter-expanded blade 22 opens and closes.

  In the figure, 25a is a reduced hydraulic port line of the enlarged arm 22a, and 25b is an enlarged hydraulic port line of the enlarged arm 22a.

  Next, usage and operation will be described. When using the magnifying head 1, as shown in FIG. 1, the male joint 7 of the magnifying head 1 and the female joint 45 of the soil sampling device 10 are joined, and the auger screw 33 is connected to the male joint 41 of the sampling device 10. The female joint 45 is joined and the soil sample collecting device 10 of the present invention is set immediately above the expansion head 1.

  A predetermined length is excavated with the diameter-expanded blade 22 closed, and the diameter-expanded blade 22 is expanded by the movement of the piston 21 by hydraulic pressure. In this state, the rooting liquid is poured into the excavation hole and the rod is rotated forward. Then, enlargement excavation of the enlarged root bulb is performed.

  In order to collect the filler immediately after filling the borehole with the root-setting liquid, the hydraulic cylinder mechanism 27 is operated and the rod 27b is projected from the cylinder 27a. It projects from the outer tube 11 in conjunction with 27b, and the window hole 12a is exposed.

  By directly rotating the expansion head 1 in the hole (same rotation as in the expansion excavation), the soil sample of the filler in the hole is taken into the inner tube 12 from the window hole 12a, and the hydraulic cylinder mechanism 27 When the rod 27b is stored in the cylinder 27a, the inner tube 12 is stored in the outer tube 11 in conjunction with the reduced diameter of the rod 27b.

  In this state, the soil sample collected by pulling up the expansion head 1 to the ground can be collected without being mixed with the fillers, impurities, etc. in other places while being kept sealed in the inner tube 12. The collected soil sample can be easily taken out by opening the lid 14.

  FIG. 2 shows a case where the soil sample collecting device 10 is set in the middle portion of the earth auger 35 and is disposed between the auger screws 33 connected to each other. The male joint of the lower auger screw 33 is fitted to the female joint 45 of the sampling device 10, and the upper female joint 45 is fitted to the male joint of the sampling device 10.

  The method for collecting earth and sand in the soil sample collecting device 10 is the same as described above, and the fixing liquid around the pile can be collected. In this case, a normal excavation head 34 is used.

It is a front view of the state provided in the front-end | tip part of the earth auger which shows one Embodiment of the sampling device of the soil sample of this invention. It is a front view of the state provided in the intermediate part of the earth auger which shows one Embodiment of the sampling device of the soil sample of this invention. It is a front view which shows one Embodiment of the sampling device of the soil sample of this invention. It is a side view which shows one Embodiment of the sampling apparatus of the soil sample of this invention. It is a top view which shows one Embodiment of the sampling device of the soil sample of this invention. It is a cross-sectional top view which shows one Embodiment of the sampling device of the soil sample of this invention. It is a vertical front view of an expansion head. It is explanatory drawing of an auger screw coupling. It is explanatory drawing which shows a prior art example.

DESCRIPTION OF SYMBOLS 1 ... Expansion head 2 ... Shaft part 3 ... Diameter expansion blade 4 ... Excavation blade 4a ... Tip bit 5 ... Spiral blade 7 ... Male joint 8 ... Mounting plate 10 ... Sampling device 10a ... Sampling part 11 ... Outer tube 12 ... Inner tube 12a ... Window hole 13 ... Connecting arm 14 ... Lid 20 ... Outer cylinder 21 ... Piston 22 ... Diameter expansion blade 22a ... Expansion arm 22b ... Bit 22c ... Cam part 23 ... Mounting bracket 24 ... Engaging recess 25a ... Reduction hydraulic port line 25b ... Expanded hydraulic port line 27 ... Hydraulic cylinder mechanism 27a ... Cylinder 27b ... Rod 30 ... Piping 31 ... Discharge port 32 ... Drive device 33 ... Auger screw 34 ... Drilling head 35 ... Earth auger 36 ... Pin 41 ... Male joint 42 ... Hexagon shaft 43, 44 ... Circular shaft part 45 ... Female joint 46 ... Hexagonal hole 47, 48 ... Circular hole part 49 ... Semi-circular hole 50 ... Hydraulic coupler 51 ... Rotating rod 52 ... Over Gar screw 53 ... soil sampling implement 54 ... spiral blade 56 ... metal disc 58 ... drilling tool attachment

Claims (2)

  An earth auger, which rotates integrally with the auger screw, is provided with a joint that fits in the auger screw joint in the vertical direction, and the lower joint is also a joint to the excavation head. Medium sample collection device.   An outer tube and an inner tube housed inside the outer tube, and a window hole for collecting a sample in the soil is formed on the outer peripheral surface of one end of the inner tube, and the other of the inner tube A hydraulic cylinder mechanism is provided at the bottom of the end of the cylinder so that the collected soil sample can be taken out, and the inner tube is taken in and out of the outer tube so that the window hole can be moved in and out of the sampling device using the outer tube and the inner tube. The soil sample collection device according to claim 1, wherein the whole is flattened in parallel.

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