JP2022098363A - Unconsolidated sample sampling device - Google Patents

Abstract

To provide an unconsolidated sample sampling device with a simple structure, allowing safe operation with a small number of persons, and allowing sampling of an unconsolidated sample at an arbitrary place in a drilling hole.SOLUTION: A sliding type lid part 10 and a sample discharging unit 44 are provided on the upper part and the lower part of a tank part capable of storing an unconsolidated sample, respectively. The sliding type lid part 10 has a double structure of an upper lid part 11 and a lower lid part 18 stored therein. By rotating the upper lid part 11 in relation to the lower lid part 18, a first sampling hole of the upper lid part 11 overlaps on a second sampling hole of the lower lid part 18, and the unconsolidated sample in a drilling hole 200 can be sampled in the tank. A piston part 49 is stored in a body part 45 of the sample discharging unit 44. By pulling a handle part 52 to this side, the piston part 49 is moved toward a right end of the body part 45, and the inside tank part is communicated with the outside tank part, then the unconsolidated sample sampled in the tank part can be discharged.SELECTED DRAWING: Figure 11

Description

The present invention relates to an apparatus for collecting an unconsolidated sample to be injected into a drilling hole in a ready-made pile embedding method.

Many pre-boring methods and deep digging methods have been proposed as methods for embedding ready-made piles. Then, when excavating an excavation hole in those construction methods, there are cases where the root compaction part to be built at the tip portion is expanded and excavated, but in either case, the root compaction liquid is injected into the tip portion of the excavation hole. Then, it is mixed with excavated earth and sand to form soil cement and solidify to build a rooted part. Further, in the pre-boring method, the ready-made pile is fixed to the ground by injecting the pile circumference fixing liquid into the pile circumference fixing portion and mixing it with the excavated earth and sand to form soil cement and solidify it.

In recent years, the high bearing capacity construction method for ready-made piles with a large tip bearing capacity coefficient has become widespread, and as a result of the increase in tip bearing capacity, there is an interest in ensuring construction quality such as ensuring the strength of the rooting part and the pile circumference fixing part. Is increasing. Therefore, the strength of the consolidated part, etc. can be confirmed by collecting the unconsolidated sample before the soil cement is solidified in the in-situ position, and the root consolidation part, etc. by collecting the consolidated sample from which the soil cement is solidified by core boring. The strength of the product has been confirmed.

However, when collecting a consolidated sample such as a consolidated part by core boring, it is necessary to insert a drilling machine to the sampling position and drill holes in the solidified soil cement, so it takes a lot of time for the collection work. It cost money. In addition, if the hardened rooted portion does not meet the specified quality, it is necessary to pull out the existing pile and reconstruct the excavation hole, which poses a great risk.

Therefore, it is easier as a work to collect an unconsolidated sample before the soil cement is solidified and check the strength, rather than to collect a consolidated sample in which the soil cement is solidified. Since it is possible to reduce the risk of quality control by estimating the above, many sampling devices that collect unconsolidated samples in a specific container have been proposed.

JP-A-2017-179855 Japanese Unexamined Patent Publication No. 2012-237192

However, the sampling mechanism of the unconsolidated sample sampling device of Patent Document 1 has a complicated structure in which the sampling port is opened and closed by hydraulic pressure, so that the sampling device is expensive and the connection of the hydraulic pipe installed on the excavation rod is connected. If the part is removed, not only the hydraulic oil will flow out and unconsolidated samples cannot be collected, but also environmental pollution and deterioration of the working environment may occur.

Further, since the collection mechanism of the unconsolidated sample collection device of Patent Document 2 is a mechanical type that opens and closes the collection port by a mechanical structure, the intake port of the collection tank is opened or closed by operating the operation rod. In the case of slackening, there is a drawback that the operation requires personnel for the operation of the operation rod, and the operation requires fine adjustment, so that the operation requires skill.

The present invention is an inexpensive device having a simple structure, which can be easily and safely operated with a small number of personnel, and can reliably collect an unconsolidated sample at an arbitrary position (depth) in a drilling hole. It is an object of the present invention to provide a consolidation sampling device.

In order to achieve the above object, the invention according to claim 1 is provided at a tank portion, a rod connecting portion provided at the upper end portion of the tank portion and connectable to a rotary rod, and a lower end portion of the tank portion. The tank portion has an anchor portion and a sample discharge unit for discharging unsolidified samples provided in the tank portion, and the tank portion has a bottomed substantially cylindrical accommodating portion and a sliding lid portion provided at the upper end portion thereof. The sliding lid portion has an upper lid portion and a lower lid portion that is arranged below the upper lid portion and is rotatably connected to the upper lid portion. Is provided with a protruding portion that protrudes downward while the first sampling hole is formed in the lower lid portion, and a second sampling hole is formed at a position corresponding to the first sampling hole in the lower lid portion. A groove that is slidable while the protruding portion is fitted is provided, and the sample discharge unit has an inflow hole that communicates with the inside of the tank portion and an outflow hole that communicates with the outside of the tank portion, and both ends are sealed. A substantially cylindrical main body portion, a substantially cylindrical piston portion that can move inside the main body portion and can close the inflow hole and the outflow hole, and a movement operation of the piston portion that is connected to the piston portion. It is characterized by having a handle portion capable of being used.

Further, the invention according to claim 2 is characterized in that a plurality of the first collection holes in the upper lid portion and the second collection holes in the lower lid portion are formed.

Further, the invention according to claim 3 is characterized in that a first seal member for closing the gap between the upper lid portion and the lower lid portion is provided, and the invention according to claim 4 is the above-mentioned invention. A second collection hole is closed between the upper lid portion and the lower lid portion, and the peripheral edge of the first collection hole formed in the upper lid portion or the second collection hole formed in the lower lid portion is surrounded. It is characterized in that a sealing member is provided.

Further, the invention according to claim 5 is characterized in that the first seal member has a grease hole capable of supplying a lubricant.

The invention according to claim 6 is characterized in that either or both of the first seal member and the second seal member are made of a material that reduces friction.

Further, the invention according to claim 7 is characterized in that the accommodating portion has a check valve.

The invention according to claim 8 replaces the anchor portion with an expanding blade that is swingably supported on the side surface of the accommodating portion and can be displaced to a reduced diameter state during forward rotation and an enlarged diameter state during reverse rotation. Or with the anchor portion.

Further, in the invention according to claim 9, the expansion wing is not provided at the arm portion oscillatingly supported by the support frame portion provided on the side surface of the accommodation portion and at the tip end portion of the arm portion. It is characterized by having a tip locking portion capable of guiding the consolidated sample between the side surface of the housing portion and the arm portion.

From the above, according to the invention of claim 1, since the structure of the unconsolidated sampling device is simple and there is no need to adjust the mechanism, the unconsolidated sample can be easily, safely and safely discharged. You can do it for sure. Further, since the tank portion has a slide type lid portion having an upper lid portion and a lower lid portion at the upper portion thereof and an anchor portion is provided at the lower end portion thereof, the tip of the anchor portion bites into the bottom surface of the excavation hole. By rotating the rotating rod in the forward and reverse directions, the second sampling hole in the lower lid can be opened and closed. Therefore, when collecting an unconsolidated sample near the bottom of the drilling hole, no operation other than the operation of the rotating rod connected to the unconsolidated sampling device is required, and only the operator of the rotating rod (minimum number of people) has not done so. A consolidated sample can be collected.

Further, according to the invention of claim 2, since the structure is such that a plurality of first collection holes in the upper lid portion and a plurality of second collection holes in the lower lid portion are formed, the second collection holes in the plurality of locations can be efficiently used. The unconsolidated sample can be stored while discharging the air in the tank portion, and the unconsolidated sample can be collected in a shorter time and more reliably.

Further, according to the third and fourth aspects of the invention, since the structure is such that the first seal member and the second seal member that close the gap between the upper lid portion and the lower lid portion are provided. It is possible to prevent the intrusion of unconsolidated sample from between the upper lid part and the lower lid part, ensure the airtightness of the tank part, and surely collect only the unconsolidated sample near the bottom surface in the drilling hole. Can be done. Further, since the structure is such that friction occurs between the first seal member or the second seal member and the upper lid portion or the lower lid portion when the upper lid portion rotates relative to the lower lid portion, it is not consolidated. While the sampling device is being rotated and lowered in the drilling hole, the lower lid is rotated by itself relative to the upper lid, and the second sampling hole of the lower lid is the first sampling of the upper lid. It is possible to prevent the unconsolidated sample from invading the tank portion by opening so as to overlap with the hole.

Further, according to the invention of claim 5, since the structure is such that the lubricant can be supplied to the first seal member from the grease hole, according to the invention of claim 6, the first seal member and the second seal member Is made of a material that reduces friction, so that when the upper lid rotates relative to the lower lid, it is between the first seal member or the second seal member and the upper lid or the lower lid. Friction is reduced. Along with this, the external force (load) required for the above rotation is also reduced, and the upper lid portion can be easily rotated relative to the lower lid portion, so that the unconsolidated sample can be consolidated in a short time. And it can be collected reliably. Further, by reducing the friction, the wear of the first seal member and the second seal portion can be reduced, so that the airtightness of the tank portion can be maintained for a long period of time.

Further, according to the invention of claim 7, since the structure has a check valve in the accommodating portion, the difference in pressure is utilized by removing the air in the tank portion from the check valve to lower the air pressure. The unconsolidated sample can be stored in the tank portion, and the unconsolidated sample can be collected in a short time and reliably.

Further, according to the invention of claim 8, since the structure has the expanding wing swingable on the side surface of the accommodating portion, the rotating rod is rotated in the reverse direction to expand the diameter of the expanding wing, and the tip portion thereof is expanded. The second sampling hole of the lower lid can be opened and closed by biting into the side wall of the excavation hole and rotating the rotary rod in the forward and reverse directions. Therefore, the unconsolidated sample can be reliably collected at an arbitrary depth of the drilling hole.

Further, according to the invention of claim 9, since the structure has a tip locking portion capable of guiding an unconsolidated sample between the side surface of the accommodating portion and the arm portion at the tip portion of the arm portion of the expansion blade. By rotating the rotating rod in the reverse direction, the expansion blade can be easily expanded in diameter, and an unconsolidated sample can be collected in a short time and reliably.

It is an exploded view of the unconsolidated sampling apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing (a) front view (b) plan view (c) bottom view (d) I-I line of the rod connecting part shown in FIG. It is sectional drawing (a) front view (b) plan view (c) bottom view (d) line II-II of the upper lid part shown in FIG. It is sectional drawing (a) front view (b) plan view (c) bottom view (d) line III-III of the lower lid part shown in FIG. It is sectional drawing (a) plan view (b) bottom view (c) front view (d) line IV-IV of the accommodation part shown in FIG. It is a front view of the unconsolidated sampling apparatus which concerns on 1st Embodiment of this invention. It is (a) plan view (b) sectional view and partial enlarged sectional view in the VV line of the state before unconsolidated sample sampling of the unconsolidated sample sampling apparatus shown in FIG. It is (a) plan view (b) sectional view and partial enlarged sectional view of the unconsolidated sampling apparatus shown in FIG. 6 at the time of unconsolidated sample sampling. It is a top view of the unconsolidated sampling apparatus which concerns on 2nd Embodiment of this invention. It is sectional drawing of the state in which the unconsolidated sampling apparatus which concerns on 1st Embodiment of this invention is lowered into a drilling hole. It is sectional drawing of the state at the time of unconsolidated sampling of the unconsolidated sampling apparatus which concerns on 1st Embodiment of this invention. It is sectional drawing of the state at the time of discharging the unconsolidated sample of the unconsolidated sampling apparatus which concerns on 1st Embodiment of this invention. It is a state diagram that the unconsolidated sampling apparatus which concerns on 3rd Embodiment of this invention is lowered into a drilling hole. FIG. 3 is a cross-sectional view taken along the line VII-VII of the unconsolidated sampling apparatus shown in FIG. It is a state diagram at the time of unconsolidated sample sampling of the unconsolidated sampling apparatus shown in FIG. FIG. 15 is a cross-sectional view taken along the line VIII-VIII of the unconsolidated sampling apparatus shown in FIG. It is sectional drawing at the time of excavation hole formation. It is a state diagram at the time of unconsolidated sample sampling by the unconsolidated sampling apparatus which concerns on 1st Embodiment of this invention. It is a state diagram at the time of the unconsolidated sample discharge by the unconsolidated sample sampling apparatus which concerns on 1st Embodiment of this invention. It is a state diagram at the time of unconsolidated sample sampling by the unconsolidated sampling apparatus which concerns on 3rd Embodiment of this invention. It is a state diagram at the time of the unconsolidated sample discharge by the unconsolidated sample sampling apparatus which concerns on 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 21. Although embodiments will be described in detail below, the present invention is not limited thereto. Further, the same components in each figure are designated by the same reference numerals, and the description thereof will be omitted. First, the unconsolidated sampling device 1 according to the first embodiment will be described. The unconsolidated sampling device 1 is mainly formed of a steel member, and as shown in FIG. 1 and the like, a rod connecting portion is attached to an upper end portion. It has a tank portion 2 provided with a 3 and an anchor portion 42 at a lower end portion thereof, and a sample discharge unit 44 provided in the tank portion 2.

As shown in FIGS. 1 and 2 (a) and 2 (d), the rod connecting portion 3 has a connecting plate 4 which is a substantially circular plate-shaped member, and an excavator is provided at a substantially central portion on the upper surface thereof. A shaft portion 7 that can be connected to the tip end portion of a rotating rod 101 such as 100 is provided. The shaft portion 7 is provided so that its central axis is substantially perpendicular to the connecting plate 4.

Further, the connecting plate 4 is formed with a first hollow portion 5 having a central angle of about 30 ° and lacking in a substantially fan shape, extending from the lower end portion of the shaft portion 7 provided at the substantially central portion thereof to the peripheral edge of the connecting plate 4. Has been done. An inclined surface 5a is formed on the lower end side of the shaft portion 7 of the first gouged portion 5 so as to be inclined in a direction in which the area of the first gouged portion increases from the upper surface to the lower surface of the connecting plate 4.

A substantially cylindrical recess 6 into which the head portion 30a of the shaft 30 described later can be inserted and fitted is formed in a substantially central portion of the lower surface of the connecting plate 4. Further, in the vicinity of the peripheral edge of the connecting plate 4, bolt holes 8 (seven in the present embodiment) for inserting bolts 15 and fixing them to the sliding lid portion 10 are formed at substantially equal intervals in the circumferential direction. ing.

The tank portion 2 has a sliding lid portion 10 and an accommodating portion 38. As shown in FIG. 1 and the like, the sliding lid portion 10 has a double structure of an upper lid portion 11 and a lower lid portion 18. As shown in FIGS. 3A to 3D, the upper lid portion 11 has a substantially cylindrical body portion 12 having a low height and an outer diameter substantially equal to the outer diameter thereof, and has an upper end portion of the body portion 12. It has a lower top plate portion 13 to be closed, and on the upper surface of the lower top plate portion 13, a substantially circular plate-shaped member having an outer diameter slightly larger than that of the body portion 12 and substantially equal to the outer diameter of the connecting plate 4 is used. A certain upper top plate portion 14 is provided.

On the outer peripheral surface of the body portion 12, a grease hole 12a with a grease nipple capable of injecting grease or the like as a lubricant into the inner peripheral surface of the body portion 12 is substantially at the center in the height direction of the body portion 12. It is provided at four locations at approximately equal intervals in the circumferential direction.

In the upper top plate portion 14, a shaft hole 14a for inserting the shaft portion 30c of the shaft 30, which will be described later, is formed in a substantially central portion thereof. The inner diameter of the shaft hole 14a is formed to be slightly larger than the outer diameter of the shaft portion 30c of the shaft 30. Then, the first gouge formed on the lower surface side of the connecting plate 4 is chipped in a substantially fan shape with a central angle of about 30 ° extending from a position slightly outside the peripheral edge of the shaft hole 14a to the peripheral edge of the upper top plate portion 14. A second gouged portion 14b having substantially the same size as the size of the portion 5 is formed.

Further, in the vicinity of the peripheral edge of the upper top plate portion 14, bolt holes 14c for inserting bolts and fixing them to the connecting plate 4 at substantially equal intervals in the circumferential direction are provided with the first hollow portion 5 of the connecting plate 4. When the second gouged portions 14b of the upper top plate portion 14 are overlapped so as to be aligned, they are formed at positions (seven in the present embodiment) corresponding to the positions of the bolt holes 8 formed in the connecting plate 4. ..

As shown in FIG. 3 and the like, the lower top plate portion 13 is formed with a fitting hole 13a into which a first bearing 32, which will be described later, can be fitted, in a substantially central portion thereof. The inner diameter of the fitting hole 13a is formed to be substantially equal to the outer diameter of the first bearing 32. Further, a substantially columnar protruding portion 13b that protrudes downward is provided at a position slightly outside the peripheral edge of the fitting hole 13a, and a position opposite to the fitting hole 13a with the fitting hole 13a interposed therebetween. Is formed with a substantially elliptical first sampling hole 13c.

The position of the first sampling hole 13c is formed at a position corresponding to the second hollow portion 14b of the upper top plate portion 14, and is shown in FIG. 3 (b) when the upper lid portion 11 is viewed from above. As described above, most of the first sampling hole 13c is visible from the gap of the second hollow portion 14b.

With the above structure, as shown in FIGS. 7 (a) and 7 (b), the rod connecting portion 3 is placed on the upper surface of the upper top plate portion 14 of the upper lid portion 11 so that the first gouged portion 5 and the second gouged portion 14b are aligned. The head portion 30a of the shaft 30 protruding from the upper surface of the upper top plate portion 14 of the upper lid portion 11 is fitted into the recess 6 formed on the lower surface of the connecting plate 4. With the shaft 30 fixed to the connecting plate 4, the bolt 15 inserted into the bolt hole 8 of the connecting plate 4 and the bolt hole 14c of the upper top plate portion 14 and the nut 16 are fastened, and the upper lid portion 11 is connected to the connecting plate. It is fixed at 4.

In this way, since the shaft 30 and the upper lid portion 11 are fixed to the connecting plate 4, when the connecting plate 4 is rotated, the shaft 30 and the upper lid portion 11 rotate in the same direction as the connecting plate 4 at the same rotation speed. do.

As shown in FIGS. 4A to 4D, the lower lid portion 18 has a substantially equal or slightly smaller outer diameter than the inner diameter of the body portion 12 of the upper lid portion 11, and is a substantially cylinder that can be inserted into the body portion 12. The first body portion 19 has a shape, and a flange portion 20 is provided at the lower end portion thereof so as to project substantially perpendicular to the outer peripheral surface of the first body portion 19. Further, near the peripheral edge of the flange portion 20, bolt holes 20a (eight in the present embodiment) for inserting bolts 15 and fixing them to the accommodating portion 38 described later are formed at substantially equal intervals in the circumferential direction. Has been done.

On the outer peripheral surface of the first body portion 19, two resin annular O-rings 25, which are waterproof sealing members extending continuously along the circumferential direction, are provided at intervals.

As will be described later, the O-ring 25 is the lower lid portion 18 when the first body portion 19 of the lower lid portion 18 is inserted into the body portion 12 of the upper lid portion 11 to assemble the slide type lid portion 10. It may be provided on the inner peripheral surface of the body portion 12 of the upper lid portion 11 facing the outer peripheral surface of the first body portion 19, or may be provided on both the outer peripheral surface and the inner peripheral surface. Further, it may be provided on either or both of the bottom surface of the lower top plate portion 13 of the upper lid portion 11 and the upper end surface of the first body portion 19 of the lower lid portion 18 facing the bottom surface.

Inside the first body portion 19, a substantially cylindrical second body portion 22 having a height slightly lower than that of the first body portion 19 and an outer diameter smaller than the inner diameter of the first body portion 19 is first. The body portion 19 and the central axis are provided in a common positional relationship. The position of the upper end portion of the second body portion 22 is located at the same height as the upper end portion of the first body portion 19. Further, inside the second body portion 22, a partition plate 23 that closes a position slightly lower than the upper end portion thereof is provided, and an accommodating portion 24 into which the first bearing 32 described later can be fitted is formed. There is.

A shaft hole 23a for inserting the shaft portion 30c of the shaft 30, which will be described later, is formed in the substantially central portion of the partition plate 23. The inner diameter of the shaft hole 23a is formed to be slightly larger than the outer diameter of the shaft portion 30c of the shaft 30.

The upper end of the inner peripheral surface of the first body 19 and the upper end of the outer peripheral surface of the second body are connected by a substantially annular connecting portion 26. The connecting portion 26 is formed with a second sampling hole 26a having a substantially elliptical shape having substantially the same size as the first sampling hole 13c formed in the lower top plate portion 13 of the upper lid portion 11.

As will be described later, the second collection hole 26a is obtained when the first body portion 19 of the lower lid portion 18 is inserted into the body portion 12 of the upper lid portion 11 to assemble the slide type lid portion 10. Since the hole 26a is formed at a position corresponding to the position of the first sampling hole 13c, the upper lid portion 11 rotates relative to the lower lid portion 18, so that the second sampling hole 26a is formed in the upper lid portion 11. The structure is such that it can be closed by the lower top plate portion 13 or completely overlapped with the first sampling hole 13c and opened (FIGS. 7A, 7B and 8B). See a) and (b)).

Further, on the upper surface of the connecting portion 26, a resin O-ring 26b, which is a sealing material for waterproofing having substantially the same shape as the second sampling hole 26a, is provided so as to surround the peripheral edge of the second sampling hole 26a. There is.

As will be described later, the O-ring 26b has a lower lid portion 18 when the first body portion 19 of the lower lid portion 18 is inserted into the body portion 12 of the upper lid portion 11 to assemble the slide type lid portion 10. May be provided on the lower surface of the lower top plate portion 13 of the upper lid portion 11 facing the upper surface of the connecting portion 26 so as to surround the peripheral edge of the first sampling hole 13c, or on the upper surface of the connecting portion 26 and the lower surface thereof. It may be provided on both of the above.

Since the O-rings 25 and 26b are provided as described above, as will be described later, the first body portion 19 of the lower lid portion 18 is inserted into the body portion 12 of the upper lid portion 11 and the sliding lid portion 10 is provided. When the upper lid portion 11 is assembled, the gap between the inner peripheral surface of the body portion 12 of the upper lid portion 11 and the outer peripheral surface of the first body portion 19 of the lower lid portion 18, and the lower top plate portion 13 and the lower lid portion 18 of the upper lid portion 11 The gap between the connecting portions 26 of the above is completely closed. Therefore, the unconsolidated sample 300 can be prevented from entering the tank portion 2 from between the upper lid portion 11 and the lower lid portion 18, and the airtightness of the tank portion 2 can be ensured.

Further, a state in which the inner peripheral surface of the body portion 12 of the upper lid portion 11 and the O-ring 25 provided on the outer peripheral surface of the first body portion 19 of the lower lid portion 18 are in contact with each other, and the lower top plate portion of the upper lid portion 11. 13 is in contact with the O-ring 26b provided at the connecting portion 26 of the lower lid portion 18. Therefore, as will be described later, when the upper lid portion 11 rotates relative to the lower lid portion 18, the inner peripheral surface of the body portion 12 of the upper lid portion 11 and the first body portion 19 of the lower lid portion 18 Friction occurs between the O-rings 25 and between the lower top plate portion 13 of the upper lid portion 11 and the O-ring 26b of the connecting portion 26 of the lower lid portion 18. Therefore, the unconsolidated sampling device 1 connected to the rotating rod 101 can be lowered and raised while rotating in the excavation hole 200 while maintaining the positional relationship between the upper lid portion 11 and the lower lid portion 18. ..

As a result, while the unconsolidated sampling device 1 is being lowered and raised while rotating in the excavation hole 200, the upper lid portion 11 rotates by itself relative to the lower lid portion 18, which will be described later. The first sampling hole 26a formed in the connecting portion 26 of the lower lid portion 18 is closed by the lower top plate portion 13 of the upper lid portion 11 and is formed in the lower top plate portion 13. The unconsolidated sample 300 invades the tank portion 2 in a state of overlapping with the 13c and opening (a state in which the inside and the outside of the tank portion 2 communicate with each other through the first sampling hole 13c and the second sampling hole 26a). Can be prevented from doing so. Therefore, when the unconsolidated sample 300 is collected in the excavation hole 200, only the unconsolidated sample 300 at an arbitrary position (depth) can be reliably collected.

Further, by injecting grease as a lubricant from the grease hole 12a provided in the body portion 12 of the upper lid portion 11, two O-rings 25 provided on the outer peripheral surface of the first body portion 19 of the lower lid portion 18 are provided. Since grease can be supplied to the gap between the parts and 25, the friction generated between the inner peripheral surface of the body portion 12 of the upper lid portion 11 and the O-ring 25 provided on the lower lid portion 18 can be reduced. can.

The O-rings 25 and 26b may be made of a material having a low coefficient of friction or may have a surface processed so as to have a low friction. By using such an O-ring 26b, it is possible to reduce the friction generated between the lower top plate portion 13 of the upper lid portion 11 and the O-ring 26b provided at the connecting portion 26 of the lower lid portion 18.

By reducing the friction as described above, the external force (load) required to rotate the upper lid portion 11 relative to the lower lid portion 18 is reduced, so that the operation of the unconsolidated sampling device 1 is performed. The property is improved, and the upper lid portion 11 can be easily rotated relative to the lower lid portion 18. Therefore, the unconsolidated sample 300 can be collected in a short time and reliably. Further, by reducing the friction, the wear of the O-rings 25 and 26b can be reduced, so that the airtightness of the tank portion 2 can be maintained for a long period of time.

The connecting portion 26 is provided with a substantially oblong elliptical groove portion 28 that is curved along the second body portion 22 and is recessed downward just outside the second body portion 22. The groove 28 extends from a position opposite to the position of the second sampling hole 26a across the second body 22 so as to surround the circumference of the second body 22 clockwise by about 90 °. .. Therefore, as will be described later, when the first body portion 19 of the lower lid portion 18 is inserted into the body portion 12 of the upper lid portion 11 to assemble the slide-type lid portion 10, the lower top plate portion 13 of the upper lid portion 11 is assembled. The protrusion 13b provided in the above can be fitted into the groove 28, and in that state, the protrusion 13b can freely slide in the groove 28.

With the above structure, as shown in FIGS. 7A and 7B, the upper lid portion 11 and the lower lid portion 18 are connected by a shaft 30 or the like, and the sliding lid portion 10 is assembled. As shown in FIG. 1, the shaft 30 used here has a substantially columnar head portion 30a, and an O-ring 30b for preventing slipping is provided on the side surface thereof along the circumferential direction. .. Further, the outer diameter is smaller than that of the head portion 30a, the shaft portion 30c is threaded downward, and a pin hole 30d is formed in the vicinity of the lower end portion thereof to penetrate the split pin 36 in the diameter direction. ing.

The shaft portion 30c of the shaft 30 is inserted into the shaft hole 14a of the upper lid portion 11, the substantially cylindrical first bearing 32 having a low height, and the shaft hole 23a of the lower lid portion 18 in this order from the top. At this time, the first body portion 19 of the lower lid portion 18 is inserted into the body portion 12 of the upper lid portion 11, and the protruding portion 13b provided on the lower top plate portion 13 of the upper lid portion 11 connects the lower lid portion 18. It is in a state of being fitted inside the groove portion 28 provided in the portion 26. Further, the first bearing 32 is fitted into the fitting hole 13a of the lower top plate portion 13 of the upper lid portion 11 and is also fitted into the accommodating portion 24 of the lower lid portion 18.

Further, the shaft portion 30c of the shaft 30 is inserted into a substantially cylindrical second bearing 33, a sleeve 34, and a washer 37 having a lower height in order from the top, and the second bearing 33, the sleeve 34, and the washer 37 have a lower lid portion 18. It is inserted in the second body portion 22 of the above. A nut 35 is loosely fastened to the lower end of the shaft portion 30c of the shaft 30, and the first bearing 32 and the lower lid are inserted in a state where the upper portion of the nut 35 is inserted into the second body portion 22 of the lower lid portion 18. A split pin 36 is inserted and fixed in the pin hole 30d so that the portion 18 and the like do not fall out from the shaft portion 30c of the shaft 30. At this time, the head portion 30a of the shaft 30 is in a state of protruding from the upper surface of the upper top plate portion 14 of the upper lid portion 11.

The outer diameters of the first bearing 32, the second bearing 33, the sleeve 34, the washer 37, and the nut 35 are substantially equal to the inner diameter of the second body portion 22. Further, the inner diameters of the first bearing 32, the second bearing 33, the sleeve 34, and the washer 37 are substantially equal to the outer diameter of the shaft portion 30c of the shaft 30.

An annular O-ring 34a made of resin, which is a waterproof sealing member extending continuously along the circumferential direction, is provided on the outer peripheral surface of the sleeve 34, and the inner peripheral surface of the second body portion 22 and the sleeve 34 are provided. The gap between the outer peripheral surfaces of the is completely closed. Therefore, as will be described later, the unconsolidated sample 300 housed in the tank portion 2 invades through the gap between the second body portion 22 and the sleeve 34 of the lower lid portion 18, and the second bearing 33 and the first bearing 32. Can be prevented from coming into contact with.

Further, by fastening the nut 35 to the lower end of the shaft portion 30c of the shaft 30 and inserting the upper portion of the nut 35 into the second body portion 22 of the lower lid portion 18, as will be described later. When the upper lid portion 11 rotates relative to the lower lid portion 18, the nut 35 rotates in the same direction as the upper lid portion 11 via the shaft 30, but at that time, the outer peripheral surface of the upper portion of the nut 35. Since friction is generated between the lower lid portion 18 and the inner peripheral surface of the second body portion 22, the speed at which the shaft 30 (upper lid portion 11) rotates can be suppressed.

As described above, the upper lid portion 11 and the lower lid portion 18 are connected by a shaft 30 or the like, and the upper lid portion 11 is fixed to the connecting plate 4, while the lower lid portion 18 is the accommodating portion 38 as described later. It has a structure that is fixed to. Therefore, the upper lid portion 11 is in a state of being relatively rotatable with respect to the lower lid portion 18.

Specifically, as shown in FIG. 7A, the protruding portion 13b provided on the lower top plate portion 13 of the upper lid portion 11 is the right end of the groove portion 28 provided on the connecting portion 26 of the lower lid portion 18. In the state of being abutted against the portion (front end portion in the forward rotation direction), as will be described later, the unconsolidated sampling device 1 is rotated forward (clockwise) together with the rotating rod 101 of the excavator 100 in the excavation hole 200. Is lowered, and the lower end portion of the anchor portion 42 is pierced into the bottom surface 200a of the excavation hole 200 so that resistance is received from the bottom surface 200a when the anchor portion 42 rotates. After that, by rotating the rotating rod 101 in the reverse direction (rotating counterclockwise), the upper lid portion 11 rotates in the reverse direction together with the connecting plate 4 of the rod connecting portion 3 connected to the rotating rod 101 at the same rotation speed.

On the other hand, the lower lid portion 18 and the accommodating portion 38 are not fixed to the connecting plate 4 or the upper lid portion 11, and are in a state of receiving resistance from the bottom surface 200a when the anchor portion 42 rotates. It cannot reversely rotate at the same rotation speed together with the upper lid portion 11, and either reversely rotates at a rotation speed slower than that of the connecting plate 4 or the like, or is maintained in a stationary state. Therefore, the upper lid portion 11 rotates relative to the lower lid portion 18, and as shown in FIG. 8A, the protruding portion 13b provided on the lower top plate portion 13 of the upper lid portion 11 is the lower lid portion. It slides along the groove 28 provided in the connecting portion 26 of 18 until it hits the left end portion (front end portion in the reverse rotation direction).

Due to the movement of the upper lid portion 11 and the lower lid portion 18 as described above, the position of the first collection hole 13c formed in the lower top plate portion 13 of the upper lid portion 11 was formed in the connecting portion 26 of the lower lid portion 18. It completely overlaps with the position of the second sampling hole 26a, and the second sampling hole 26a is opened. Therefore, as shown in FIGS. 8A and 8B, the unconsolidated sample 300 located outside the unconsolidated sampling device 1 is the upper portion of the first gouged portion 5 and the upper lid portion 11 of the connecting plate 4. The sample can flow into the tank portion 2 through the second sampling hole 14b of the top plate portion 14, the first sampling hole 13c of the lower top plate portion 13, and the second sampling hole 26a of the connecting portion 26 of the lower lid portion 18. The unconsolidated sample 300 can be housed in the tank portion 2.

If the rotating rod 101 continues to rotate in the reverse direction even after the protruding portion 13b of the upper lid portion 11 hits the left end portion of the groove portion 28 of the lower lid portion 18, when the anchor portion 42 rotates, the bottom surface 200a Even in a state of receiving resistance, the lower lid portion 18 and the accommodating portion 38 to which the lower lid portion 18 is fixed rotate in the reverse direction at the same rotation speed together with the connecting plate 4 and the upper lid portion 11.

Next, as shown in FIG. 8A, the protruding portion 13b provided on the lower top plate portion 13 of the upper lid portion 11 is attached to the left end portion of the groove portion 28 provided on the connecting portion 26 of the lower lid portion 18. The position of the first sampling hole 13c formed in the lower top plate portion 13 of the upper lid portion 11 and the position of the second sampling hole 26a formed in the connecting portion 26 of the lower lid portion 18 completely overlap with each other. When the rotary rod 101 is rotated in the forward direction while receiving resistance from the bottom surface 200a when the anchor portion 42 rotates in the same manner as described above, the upper lid portion 11 is positive at the same rotation speed as the connecting plate 4. Rotate.

On the other hand, the lower lid portion 18 and the accommodating portion 38 are not fixed to the connecting plate 4 or the upper lid portion 11, and are in a state of receiving resistance from the bottom surface 200a when the anchor portion 42 rotates. It cannot rotate forward together with the upper lid portion 11 at the same rotation speed, and either rotates forward at a rotation speed slower than that of the connecting plate 4 or the like, or is maintained in a stationary state. Therefore, the upper lid portion 11 rotates relative to the lower lid portion 18, and as shown in FIG. 7A, the protruding portion 13b provided on the lower top plate portion 13 of the upper lid portion 11 is the lower lid portion. It slides along the groove 28 provided in the connecting portion 26 of the 18 until it hits the right end portion thereof.

Due to the movement of the upper lid portion 11 and the lower lid portion 18 as described above, the position of the first collection hole 13c formed in the lower top plate portion 13 of the upper lid portion 11 was formed in the connecting portion 26 of the lower lid portion 18. The position is shifted clockwise by about 90 ° from the position of the second sampling hole 26a with respect to the shaft portion 30c of the shaft 30, and the first sampling hole 13c and the second sampling hole 26a do not overlap at all. Become. Therefore, as shown in FIGS. 7A and 7B, the second sampling hole 26a is in a state of being closed by the lower top plate portion 13 of the upper lid portion 11, and therefore, the unconsolidated sampling device 1 is used. The unconsolidated sample 300 located on the outside does not flow into the tank portion 2 from the second sampling hole 26a.

If the rotating rod 101 continues to rotate in the forward direction even after the protruding portion 13b of the upper lid portion 11 hits the right end of the groove portion 28 of the lower lid portion 18, when the anchor portion 42 rotates, the bottom surface 200a Even in a state of receiving resistance, the lower lid portion 18 and the accommodating portion 38 to which the lower lid portion 18 is fixed rotate forward together with the connecting plate 4 and the upper lid portion 11 at the same rotation speed.

In the unconsolidated sampling device 1 according to the first embodiment, as shown in FIGS. 7 (a) and 7 (b), the first sampling hole 13c and the first sampling hole 13c formed in the lower top plate portion 13 of the upper lid portion 11 and the like. The second sampling holes 26a formed in the connecting portion 26 of the lower lid portion 18 are one by one, but the unconsolidated sampling device 1A according to the second embodiment shown in FIGS. 9A and 9B. As described above, a plurality of (two in the present embodiment) may be formed at the positions corresponding to the first sampling hole 13c of the upper lid portion 11A and the second sampling hole 26a of the lower lid portion 18A in the sliding lid portion 10A. ..

According to the above structure, the upper lid portion 11A rotates relative to the lower lid portion 18A, and as shown in FIG. 9A, the protruding portion 13b provided on the lower top plate portion 13 of the upper lid portion 11A is lowered. Two first collections formed on the lower top plate portion 13 of the upper lid portion 11A by sliding along the groove portion 28 provided in the connecting portion 26 of the lid portion 18A until it hits the front end portion in the forward rotation direction thereof. The position of the hole 13c completely overlaps with the position of the two second sampling holes 26a formed in the connecting portion 26 of the lower lid portion 18A, and the two second sampling holes 26a are opened. As a result, the unconsolidated sample 300 is discharged into the tank portion 2 while efficiently discharging the air in the tank portion 2 from the two second sampling holes 26a formed in the sliding lid portion 10A (lower lid portion 18A). Since it can be accommodated in the air, the unconsolidated sample 300 can be collected in a shorter time and more reliably.

The structure of the unconsolidated sampling device 1A according to the second embodiment is the same as the structure of the unconsolidated sampling device 1 according to the first embodiment, except for the structure of the sliding lid portion 10A. Further, similarly to the structure of the unconsolidated sampling device 1, an O-ring 26b is provided so as to surround the peripheral edge of the two second sampling holes 26a or the peripheral edge of the first sampling hole 13c.

As shown in FIGS. 5A to 5D, the accommodating portion 38 is a substantially cylindrical member having a bottom plate portion 38a, and the unconsolidated sample 300 can be accommodated therein. ing. Further, the upper end portion of the accommodating portion 38 is opened, and a flange portion 40 is provided so as to project outward substantially perpendicular to the side surface thereof, and bolts 15 are inserted in the vicinity of the peripheral edge thereof at substantially equal intervals. A bolt hole 40a for fixing the lower lid portion 18 is formed. This bolt hole 40a is located at a position corresponding to the bolt hole 20a of the lower lid portion 18 when the flange portion 20 of the lower lid portion 18 and the flange portion 40 of the accommodating portion 38 are overlapped so as to be aligned (8 in the present embodiment). It is formed in one).

Further, at a position inside the bolt hole 40a of the flange portion 40, a resin annular ring is a sealing member for waterproofing that continuously extends along the circumferential direction and enhances the sealing of the accommodating portion 38. An O-ring 39 is provided.

Therefore, as shown in FIGS. 7 (a) and 7 (b), the flange portion 20 of the lower lid portion 18 and the flange portion 40 of the accommodating portion 38 are overlapped with each other so that the bolt holes 20a and 40a are aligned. The bolt 15 and the nut 16 inserted through the 20a and 40a are fastened, the lower lid portion 18 is fixed to the accommodating portion 38, and the upper end portion of the accommodating portion 38 is sealed.

The bottom plate portion 38a of the accommodating portion 38 is provided with a substantially cylindrical discharge port 41 for discharging the unconsolidated sample 300 accommodated in the accommodating portion 38 of the tank portion 2 to the outside of the accommodating portion 38. Specifically, a substantially cylindrical discharge port 41 is provided so as to penetrate the bottom plate portion 38a of the accommodating portion 38 and project from the upper surface and the lower surface of the bottom plate portion 38a.

Further, the bottom plate portion 38a is provided with an anchor portion 42. As shown in FIGS. 5 (b) to 5 (d), the anchor portion 42 is composed of two substantially rectangular plate-shaped members, and the two plate-shaped members intersect at a substantially central portion of the bottom plate portion 38a. It is formed in a cross shape, and the anchor portion 42 is provided so as to extend downward substantially perpendicular to the lower surface of the bottom plate portion 38a.

On the upper surface of the bottom plate portion 38a in the accommodating portion 38, a sample discharge unit 44 extending in the radial direction through a substantially central portion of the bottom plate portion 38a is provided. The sample discharge unit 44 has a substantially cylindrical main body portion 45 having a bottom portion 45b, and both ends thereof are installed in a state of protruding from the accommodating portion 38. One end of the main body 45 is sealed by a bottom 45b, the other end is opened, and a flange 45c is provided so as to project outward substantially perpendicular to the side surface 45a, and the flange 45c is provided with a flange 45c outside the main body 45. The end plate portion 46 having an outer diameter substantially equal to the diameter is fixed and sealed.

Further, on the side surface 45a of the main body portion 45, a substantially circular inflow hole 45d is formed at the highest position in the vertical direction in the accommodating portion 38, and an outflow hole 45e is formed at the lowest position. The inner diameters of the inflow hole 45d and the outflow hole 45e are formed to be substantially equal.

Further, above the sample discharge unit 44, a funnel member 48 having a tapered portion 48a that narrows downward is provided. Specifically, the entire peripheral edge portion of the upper end portion of the tapered portion 48a of the funnel member 48 is fixed in close contact with the inner peripheral surface of the accommodating portion 38 without a gap, and the lower end portion of the tapered portion 48a is directed downward. An extending substantially cylindrical opening 48b is provided, and the lower end thereof is connected to the inflow hole 45d formed on the side surface 45a of the main body 45 of the sample discharge unit 44 without a gap.

Further, the outflow hole 45e on the side surface 45a of the main body portion 45 is connected to the upper end portion of the discharge port 41 provided in the bottom plate portion 38a of the accommodating portion 38 without a gap.

In the unconsolidated sampling devices 1 and 1A, the opening 48b of the funnel member 48 and the sample discharge so that the unconsolidated sample 300 housed in the storage unit 38 can be easily discharged to the outside of the storage unit 38. The inflow hole 45d and the outflow hole 45e of the unit 44 and the discharge port 41 of the accommodating portion 38 are all provided at corresponding positions (on a straight line) in the vertical direction of the accommodating portion 38, but are not necessarily provided at the corresponding positions. It does not have to be.

Inside the main body 45, a substantially columnar piston portion 49 having an outer diameter substantially equal to the inner diameter of the main body 45 is housed, and the piston portion 49 can move in the longitudinal direction in the main body 45. It has become. A resin annular O-ring 50, which is a waterproof sealing member extending continuously along the circumferential direction, is provided near both ends of the side surface of the piston portion 49, and the O-ring 50 is the main body portion 45. It is in contact with the inner peripheral surface of the side surface 45a of the above. As a result, friction is generated between the inner peripheral surface of the side surface 45a and the O-ring 50 of the piston portion 49, so that the piston portion 49 can be kept at a desired position in the main body portion 45. The length of the piston portion 49 is longer than the inner diameters of the inflow hole 45d and the outflow hole 45e formed on the side surface 45a of the main body portion 45.

The piston portion 49 is fixed in a state of penetrating both end surfaces (both bottom surfaces) thereof, and is provided with a rod portion 51 extending in the longitudinal direction of the main body portion 45. The rod portion 51 is inserted into the insertion hole 46a formed at substantially the center of the end plate portion 46 of the sample discharge unit 44 and protrudes from the end plate portion 46, and the piston portion 49 is located at the tip of the rod portion 51. A handle portion 52 for moving the rod is provided.

With the above structure, the piston portion 49 can be moved in the main body portion 45 in the longitudinal direction by operating the handle portion 52. Specifically, by pushing the handle portion 52 toward the main body portion 45 as far as it will go, the piston portion 49 is pushed to the left end in the main body portion 45 via the rod portion 51 as shown in FIG. 5 (d). It can be moved to the innermost position).

As a result, the inflow hole 45d and the outflow hole 45e of the main body 45 of the sample discharge unit 44 are closed by the piston portion 49, so that the unconsolidated sample 300 housed in the storage portion 38 of the tank portion 2 However, it can be prevented from being discharged to the outside of the accommodating portion 38 from the inflow hole 45d or the like.

On the contrary, by pulling the handle portion 52 toward you, as shown in FIG. 12, the piston portion 49 can be moved toward the right end (front) position in the main body portion 45 via the rod portion 51.

As a result, the inflow hole 45d and the outflow hole 45e of the main body 45 that were blocked by the piston portion 49 are opened (the inside and the outside of the tank portion 2 communicate with each other through the inflow hole 45d and the outflow hole 45e). Therefore, the unconsolidated sample 300 accommodated in the accommodating portion 38 of the tank portion 2 is passed through the opening 48b of the funnel member 48, the inflow hole 45d and the outflow hole 45e of the main body portion 45, and the discharge port 41 to the tank portion 2. It can be discharged to the outside.

A check valve capable of bleeding air from the tank portion 2 may be provided on the side surface of the accommodating portion 38 (not shown). The second sampling holes 26a of the lower lid portions 18 and 18A of the unsolidified sampling devices 1, 1A are closed by the lower top plate portion 13 of the upper lid portions 11 and 11A, and the main body of the sample discharge unit 44 is set. The inflow hole 45d and the outflow hole 45e of the portion 45 are closed by the piston portion 49, and the air pressure in the tank portion 2 is removed by removing the air in the tank portion 2 from the check valve using a vacuum pump or the like. Can be reduced. By doing so, the unconsolidated sample 300 can be housed in the tank portion 2 by utilizing the difference in pressure inside and outside the tank portion 2, so that the unconsolidated sample 300 can be collected in a shorter time and more reliably. be able to.

Next, a method for collecting the unconsolidated sample 300 using the unconsolidated sampling devices 1, 1A will be specifically described. First, as shown in FIG. 17, an excavator 102 is connected to the tip of a rotary rod 101 of an excavator 100, and an excavation hole 200 having a predetermined depth is excavated in the ground 201 while rotating. After excavation, the excavating device 102 is repeatedly rotated up and down while injecting the root-solidifying liquid into the tip of the excavation hole 200, and the root-solidifying liquid and the excavated earth and sand are mixed and stirred. In this way, the root consolidation portion is constructed while forming the soil cement 300a before solidification, which is the unconsolidated sample 300.

Then, while injecting the pile circumference fixing liquid, the excavator 102 is rotated and repeatedly moved up and down to mix and stir the pile circumference fixing liquid and the excavated earth and sand. In this way, the pile circumference fixing portion is constructed while forming the soil cement 300b before solidification, which is the unconsolidated sample 300.

Then, the rotary rod 101 and the excavator 102 are pulled up from the excavation hole 200, the excavator 102 connected to the tip of the rotary rod 101 is removed, and instead, the unconsolidated sampling devices 1, 1A are removed via the rod connecting portion 3. To consolidate.

At this time, as shown in FIGS. 7 (a), 7 (b) and 9 (a), the sliding lid portions 10 and 10A have a protruding portion 13b provided on the lower top plate portion 13 of the upper lid portions 11 and 11A. Is in contact with the right end portion (front end portion in the forward rotation direction) of the groove portion 28 provided in the connecting portion 26 of the lower lid portions 18, 18A, and the second sampling hole of the lower lid portions 18, 18A. 26a is in a state of being closed by the lower top plate portion 13. Further, as shown in FIG. 7B, the inflow hole 45d and the outflow hole 45e of the main body portion 45 of the sample discharge unit 44 are in a state of being closed by the piston portion 49.

If a check valve capable of bleeding air from the tank portion 2 is provided on the side surface of the accommodating portion 38 of the unconsolidated sampling devices 1 and 1A, use a vacuum pump or the like to reverse the check valve. The air in the tank portion 2 is evacuated from the check valve to reduce the air pressure in the tank portion 2.

Then, in order to collect the soil cement 300a in the consolidation portion of the excavation hole 200, as shown in FIG. 10, the unconsolidated sampling devices 1 and 1A are rotated forward (clockwise) together with the rotating rod 101 of the excavator 100. In this state, it is lowered to the bottom surface 200a of the excavation hole 200. At this time, the lower lid portions 18, 18A and the accommodating portion 38 rotate forward together with the connecting plate 4 and the upper lid portion 11 at the same rotation speed as the rotating rod 101.

Then, as shown in FIGS. 11 and 18, the lower end portion of the anchor portion 42 is pierced into the bottom surface 200a of the excavation hole 200 so that resistance is received from the bottom surface 200a when the anchor portion 42 rotates.

After the anchor portion 42 is in a state of receiving resistance, the rotating rod 101 is rotated in the reverse direction (counterclockwise rotation). As a result, as described above, the connecting plate 4 and the upper lid portion 11 rotate in the reverse direction together with the rotating rod 101 at the same rotation speed, but the lower lid portions 18, 18A and the accommodating portion 38 are more than the connecting plate 4 and the upper lid portions 11, 11A. It rotates in the reverse direction at a slow rotation speed or remains stationary. Therefore, the upper lid portions 11 and 11A rotate relative to the lower lid portions 18 and 18A, and the protruding portions 13b provided on the lower top plate portion 13 of the upper lid portions 11 and 11A are the lower lid portions 18 and 18A. It slides along the groove 28 provided in the connecting portion 26 until it hits the left end portion (front end portion in the reverse rotation direction).

Then, as shown in FIGS. 8A, 8B, 9B, and 11A, the position of the first sampling hole 13c formed in the lower top plate portion 13 of the upper lid portions 11 and 11A is lower. Since the second sampling hole 26a completely overlaps with the position of the second sampling hole 26a formed in the connecting portion 26 of the lid portions 18 and 18A and the second sampling hole 26a is opened, the unconsolidated sample is formed in the consolidation portion of the drilling hole 200. The soil cement 300a existing in the vicinity of the first sampling port 13c of the sampling devices 1 and 1A can be accommodated in the tank portion 2 via the first sampling hole 13c and the second sampling hole 26a.

After the protruding portion 13b of the upper lid portion 11 abuts on the left end portion in the groove portion 28 of the lower lid portions 18, 18A, the lower lid portions 18, 18A and the accommodating portion 38 are connected to the connecting plate 4 and the upper lid portion 11, Together with 11A, it rotates in the reverse direction at the same rotation speed as the rotating rod 101.

After accommodating a sufficient amount of soil cement 300a in the tank portion 2, the rotating rod 101 is rotated forward (clockwise) this time. As a result, as described above, the connecting plate 4 and the upper lid portion 11 rotate forward together with the rotating rod 101 at the same rotation speed, but the lower lid portions 18, 18A and the accommodating portion 38 are more than the connecting plate 4 and the upper lid portions 11, 11A. It rotates forward at a slow rotation speed or remains stationary. Therefore, the upper lid portions 11 and 11A rotate relative to the lower lid portions 18 and 18A, and the protruding portions 13b provided on the lower top plate portion 13 of the upper lid portions 11 and 11A are the lower lid portions 18 and 18A. It slides along the groove 28 provided in the connecting portion 26 until it hits the right end portion (front end portion in the forward rotation direction).

As a result, as shown in FIGS. 7 (a), 7 (b) and 9 (a), the position of the first sampling hole 13c formed in the lower top plate portion 13 of the upper lid portions 11 and 11A is the position of the lower lid portion. Since the position of the second sampling hole 26a formed in the connecting portion 26 of the 18th and 18A is deviated from the position of the second sampling hole 26a, the second sampling hole 26a is closed by the lower top plate portion 13 of the upper lid portions 11 and 11A. 2 The inflow of soil cement 300a from the sampling hole 26a into the tank portion 2 can be blocked.

After the protruding portion 13b of the upper lid portions 11 and 11A abuts on the right end portion in the groove portion 28 of the lower lid portions 18 and 18A, the lower lid portions 18, 18A and the accommodating portion 38 are connected to the connecting plate 4 and the upper lid portion. Together with 11 and 11A, it rotates forward at the same rotation speed as the rotating rod 101.

As described above, the unconsolidated sampling devices 1 and 1A connected to the tip of the rotary rod 101 can be operated only by the operation of the rotary rod 101 of the excavator 100 by the operator 400, and the root of the drill hole 200 can be operated. The soil cement 300a can be reliably collected at the consolidated portion.

Next, as shown in FIGS. 12 and 19, the soil cement contained in the tank portion 2 is pulled up from the excavation hole 200 by the excavator 100 while rotating the rotary rod 101 and the unconsolidated sampling devices 1 and 1A in the forward direction. In order to collect the 300a, the unconsolidated sample collection device 1, 1A is moved so that the discharge hole 41 of the unconsolidated sample collection device 1, 1A is located directly above the unconsolidated sample collection box 103.

After the movement, the operator 400 pulls the handle portion 52 toward the end so that the inflow hole 45d and the outflow hole 45e of the main body portion 45 of the sample discharge unit 44, which has been blocked by the piston portion 49, are opened. By discharging the soil cement 300a contained in the portion 2 to the outside of the tank portion 3, the soil cement 300a is collected in the unconsolidated sample collection box 103.

After discharging all the soil cement 300a in the tank portion 2, the handle portion 52 is pushed all the way toward the main body portion 45, so that the main body portion 45 of the sample discharge unit 44 can be used as shown in FIG. The inflow hole 45d and the outflow hole 45e are set to be closed by the piston portion 49, and the next work is prepared.

As described above, since the unconsolidated sampling devices 1 and 1A have a simple structure and do not require mechanical adjustment, the soil cement 300a can be easily, safely and reliably collected and discharged. Can be done.

Next, the unconsolidated sampling device 1B according to the third embodiment will be described. Similar to the unconsolidated sampling device 1 according to the first embodiment, the rod connecting portion 3 is provided at the upper end portion and the lower end portion thereof. It has a tank portion 2 provided with an anchor portion 42 and a sample discharge unit 44 provided in the tank portion 2, and a support frame portion near the substantially central portion of the side surface of the accommodating portion 38 of the tank portion 2 in the longitudinal direction. An expansion wing 55 is provided via the 54.

Specifically, as shown in FIGS. 13 to 16, on the side surface of the accommodating portion 38 of the tank portion 2, two support frame portions 54, 54 projecting outward with respect to the side surface are the accommodating portion 38. It is provided point-symmetrically at positions opposite to each other with the central axis of the above. The support frame portion 54 is a frame having a substantially U-shaped cross section formed by bending a plate-shaped member, and has an upper frame portion 54a, a lower frame portion 54b, and a side frame portion 54c.

The upper frame portion 54a and the lower frame portion 54b are provided so as to be parallel to each other and extend substantially vertically and horizontally with respect to the side surface of the accommodating portion 38, respectively. Further, a rod-shaped shaft portion 54d is provided so as to pass between the upper frame portion 54a and the lower frame portion 54b. The side frame portion 54c is provided so as to extend substantially perpendicular to the side surface of the accommodating portion 38 and in the vertical direction and pass between the ends of the upper frame portion 54a and the lower frame portion 54b.

The expansion blade 55 has an arm portion 56 and a tip locking portion 58. The arm portion 56 is a curved horizontally long substantially rectangular plate-shaped member, and is curved toward the accommodating portion 38 with a curvature substantially similar to the curvature of the side surface of the accommodating portion 38, and a shaft hole 56c is provided at one end thereof. It is formed. Then, between the upper frame portion 54a and the lower frame portion 54b, the shaft portion 54d of the support frame portion 54 is inserted into the shaft hole 56c of the arm portion 56. Therefore, the arm portion 56 is supported by the shaft portion 54d in a state perpendicular to the side surface of the accommodating portion 38, and is supported so as to be swingable in the horizontal direction around the shaft portion 54d.

Further, the tip locking portion 58 is a vertically long substantially rectangular plate-shaped member, and at the other end (tip) of the arm portion 56, is substantially perpendicular to the arm portion 56 and extends in the vertical direction, and the accommodating portion 38. It is provided so as to be substantially perpendicular to the side surface of the.

With the above structure, as shown in FIGS. 13 and 14, the arm portion 56 of the two expansion blades 55 and 55 is wound around the side surface of the accommodating portion 38 (closed state), and the drill hole 200 is at a predetermined depth. When the unconsolidated sampling device 1B is rotated forward (rotated clockwise) together with the rotating rod 101 of the excavator 100 in the pile circumference fixing portion, the soil cement 300b which is the unconsolidated sample 300 in the excavation hole 200 causes the unconsolidated sample collection device 1B. Since the force that causes the expansion blade 55 to rotate clockwise (diameter) around the shaft portion 54d does not act, the arm portions 56 of the two expansion blades 55 and 55 remain wound around the side surface of the accommodating portion 38 (closed). (As it is) is maintained.

On the other hand, when the unconsolidated sampling device 1B rotates in the reverse direction (rotates counterclockwise) together with the rotating rod 101, the soil cement 300b hits the front surface 58a of the tip locking portion 58 and is in the vertical and horizontal directions of the front surface 58a of the tip locking portion 58. The soil cement 300b flows between the side surface of the accommodating portion 38 and the inner end surface 58b of the tip locking portion 58 and the inner end surface 56a of the arm portion 56, and a gap is created between them.

Then, as the unconsolidated sampling device 1B continues to rotate in the reverse direction, the soil cement 300b flows into the gap and continues to hit the inner end surface 56a of the arm portion 56, and also to the inner end surface 58b of the tip locking portion 58. Keep hitting. As a result, as shown in FIGS. 15 and 16, a force that causes the expansion blade 55 to rotate clockwise (diameter) around the shaft portion 54d by the soil cement 300b acts on the arm portions 56 of the two expansion blades 55 and 55. The outer end surface 56b continues to rotate (diameter) clockwise around the shaft portion 54d until it hits the side frame portion 54c of the support frame 54.

Further, in a state where the arm portions 56 of the two expansion blades 55 and 55 are expanded in diameter, the unconsolidated sampling device 1B rotates forward (clockwise) together with the rotating rod 101, so that the soil cement 300b becomes the arm portion 56. Continue to hit the outer end face 56b. As a result, a force that causes the expansion blade 55 to rotate counterclockwise (diameter) around the shaft portion 54d by the soil cement 300b acts on the arm portions 56 of the two expansion blades 55 and 55, and the inner end faces 56a thereof are the accommodating portions 38. It is in a state of continuing to rotate counterclockwise (diameter reduced) around the shaft portion 54d until it hits the side surface of.

In the tip locking portion 58 provided at the tip of the arm portion 56, when the unconsolidated sampling device 1B rotates in the reverse direction (counterclockwise rotation), the arm portion 56 of the expansion blade 55 easily rotates around the shaft portion 54d. The side surface of the accommodating portion 38, the inner end surface 58b of the tip locking portion 58, and the inner side of the arm portion 56 so that the soil cement 300b can be reliably collected in a short time by rotating clockwise (diameter expansion). It is desirable that the soil cement has a size (area) sufficient to secure a sufficient flow rate of the soil cement 300b to and from the end face 56a.

Further, when the unconsolidated sampling device 1B rotates in the reverse direction (counterclockwise rotation), the soil cement 300b that hits the front surface 58a of the tip locking portion 58 of the expansion blade 55 is locked to the side surface of the accommodating portion 38 and the tip. The expansion blade is smoothly guided between the inner end surface 58b of the portion 58 and the inner end surface 56a of the arm portion 56 so that the expansion blade 55 rotates clockwise (diameter expansion) around the shaft portion 54d more easily. When the 55 is wound around the side surface of the accommodating portion 38 (closed state), it is desirable that the angle α of the tip locking portion 58 with respect to the side surface of the accommodating portion 38 is 90 degrees or less (see FIG. 14).

Next, a method for collecting the unconsolidated sample 300 using the unconsolidated sample collection device 1B will be specifically described. First, as shown in FIG. 17, as in the above embodiment, the excavator 102 is connected to the tip of the rotary rod 101 of the excavator 100 to excavate an excavation hole 200 having a predetermined depth in the ground 201, and roots are excavated. By injecting a solidifying liquid and a pile circumference fixing liquid and mixing and stirring, a root hardening portion and a pile circumference fixing portion are constructed while forming soil cements 300a and 300b before solidification, which are unsolidified samples 300.

Then, the rotary rod 101 is pulled up from the excavation hole 200, the excavation device 102 connected to the tip thereof is removed, and the unconsolidated sampling device 1B is connected via the rod connecting portion 3 instead.

At this time, in the sliding lid portion 10, the protruding portion 13b provided on the lower top plate portion 13 of the upper lid portion 11 connects the lower lid portion 18 as in the case shown in FIGS. 7 (a) and 7 (b). The second collection hole 26a of the lower lid portion 18 is closed by the lower top plate portion 13 because it is in a state of abutting against the right end portion (front end portion in the forward rotation direction) of the groove portion 28 provided in the portion 26. It is in a state of being. Further, the inflow hole 45d and the outflow hole 45e of the main body 45 in the sample discharge unit 44 are closed by the piston portion 49 as in the case shown in FIG. 7B. Further, the arm portions 56 of the two expansion blades 55 and 55 are in a state of being wound around the side surface of the accommodating portion 38 (closed state).

If a check valve capable of bleeding air from the tank portion 2 is provided on the side surface of the accommodating portion 38 of the unconsolidated sampling device 1B, use a vacuum pump or the like to provide a check valve. The air in the tank portion 2 is evacuated to lower the air pressure in the tank portion 2.

Then, in order to collect the soil cement 300b at the pile circumference fixing portion of the excavation hole 200 at a predetermined depth, the unconsolidated sample collection device 1B is rotated forward (rightward) together with the rotary rod 101 of the excavator 100. The excavation hole 200 is lowered to a predetermined depth. At this time, the lower lid portion 18 and the accommodating portion 38 rotate forward together with the connecting plate 4 and the upper lid portion 11 at the same rotation speed as the rotating rod 101, and the arm portions 56 of the two expansion blades 55 and 55 are shown in FIGS. 13 and 13. As shown in 14, the state of being wrapped around the side surface of the accommodating portion 38 (the state of being closed) is maintained.

After the unconsolidated sampling device 1B descends to a predetermined depth, the rotating rod 101 is rotated in the reverse direction (counterclockwise rotation). As a result, the connecting plate 4 and the upper lid portion 11 rotate in the reverse direction together with the rotating rod 101 at the same rotation speed, and the lower lid portion 18 and the accommodating portion 38 also rotate in the reverse direction at the same rotation speed. At this time, due to the flow of the soil cement 300b that hits the front surface 58a of the tip locking portion 58 of the expansion blade 55 as described above, the side surface of the accommodating portion 38, the inner end surface 58b of the tip locking portion 58, and the arm portion 56 A gap is created between the inner end surface 56a and the arm portions 56 of the two expansion blades 55 and 55, and the arm portions 56 continue to rotate (diameter) clockwise around the shaft portion 54d.

Then, as the expansion blade 55 continues to rotate (diameter) clockwise around the shaft portion 54d, as shown in FIGS. 15, 16 and 20, the tip locking portion 58 of the expansion blade 55 is formed in the excavation hole 200. It hits the side wall 200b and pierces it so that it bites deeply. As a result, the expanding wing 55 is in a state of receiving resistance from the side wall 200b, and the accommodating portion 38 provided with the expanding wing 55 and the lower lid portion 18 fixed to the accommodating portion 38 have the same rotational speed together with the rotating rod 101. It cannot rotate in the reverse direction, and either rotates in the reverse direction at a rotation speed slower than that of the rotating rod 101, or is maintained in a stationary state.

On the other hand, the connecting plate 4 and the upper lid portion 11 continue to rotate in the reverse direction at the same rotation speed together with the rotating rod 101. Therefore, the upper lid portion 11 rotates relative to the lower lid portion 18, and the protruding portion 13b provided on the lower top plate portion 13 of the upper lid portion 11 is a groove portion provided on the connecting portion 26 of the lower lid portion 18. Slide along 28 until it hits its left end (front end in the reverse rotation direction).

Due to the movement of the upper lid portion 11 and the lower lid portion 18 as described above, the first first formed on the lower top plate portion 13 of the upper lid portion 11 as in the cases shown in FIGS. 8A, 8B and 11A. Since the position of the sampling hole 13c completely overlaps with the position of the second sampling hole 26a formed in the connecting portion 26 of the lower lid portion 18 and the second sampling hole 26a is opened, the pile circumference of the drilling hole 200 is fixed. The soil cement 300b existing in the vicinity of the first sampling hole 13c of the unconsolidated sampling device 1B can be accommodated in the tank section 2 via the first sampling hole 13c and the second sampling hole 26a.

After the protruding portion 13b of the upper lid portion 11 hits the left end portion in the groove portion 28 of the lower lid portion 18, even if the expansion blade 55 receives resistance from the side wall 200b, the lower lid portion 18 and the lower lid portion 18 and The accommodating portion 38 rotates in the reverse direction together with the connecting plate 4 and the upper lid portion 11 at the same rotation speed as the rotating rod 101.

After accommodating a sufficient amount of soil cement 300b in the tank portion 2, the rotating rod 101 is rotated forward (clockwise) this time. As a result, as described above, the connecting plate 4 and the upper lid portion 11 rotate forward together with the rotating rod 101 at the same rotation speed.

On the other hand, since the tip locking portion 58 of the expansion blade 55 bites deeply into the side wall 200b of the excavation hole 200 and the expansion blade 55 receives resistance from the side wall 200b, the lower lid portion 18 and the accommodating portion 38 rotate. It rotates forward at a rotation speed slower than that of the rod 101, or remains stationary. Therefore, the upper lid portion 11 rotates relative to the lower lid portion 18, and the protruding portion 13b provided on the lower top plate portion 13 of the upper lid portion 11 is a groove portion provided on the connecting portion 26 of the lower lid portion 18. Slide along 28 until it hits its right end (front end in the forward rotation direction).

As a result, as in the case shown in FIGS. 7 (a) and 7 (b), the position of the first sampling hole 13c formed in the lower top plate portion 13 of the upper lid portion 11 becomes the connecting portion 26 of the lower lid portion 18. Since the position of the second sampling hole 26a deviates from the formed position of the second sampling hole 26a and the second sampling hole 26a is closed by the lower top plate portion 13 of the upper lid portion 11, the inside of the tank portion 2 from the second sampling hole 26a The inflow of soil cement 300b to the soil cement 300b can be blocked.

After the protruding portion 13b of the upper lid portion 11 abuts on the right end portion in the groove portion 28 of the lower lid portion 18, the lower lid portion 18 and the accommodating portion 38 are combined with the connecting plate 4 and the upper lid portion 11 with the rotating rod 101. It rotates forward at the same rotation speed. As a result, the tip locking portion 58 of the expansion blade 55 in a state of deeply biting into the side wall 200b of the excavation hole 200 is disengaged from the side wall 200b, and the soil cement 300b continues to hit the outer end surface 56b of the arm portion 56. As a result, the arm portions 56 of the two expansion blades 55 and 55 continue to rotate counterclockwise (diameter reduced) around the shaft portion 54d until the inner end surface 56a hits the side surface of the accommodating portion 38, and FIGS. 13 and 14 As shown in the above, it returns to the state of being wrapped around the side surface of the accommodating portion 38 (closed state).

As described above, the unconsolidated sampling device 1B connected to the tip of the rotary rod 101 can be operated only by the operation of the rotary rod 101 of the excavator 100 by the operator 400, and the pile circumference of the drill hole 200 is fixed. The soil cement 300b can be reliably collected at an arbitrary depth of the portion.

Further, in the unconsolidated sampling device 1B according to the third embodiment, the soil cement 300b of the pile circumference fixing portion of the excavation hole 200 can be collected by using the expansion blade 55 as described above. By using the anchor portion 42 in the same manner as in the first embodiment, the soil cement 300a of the consolidation portion can also be collected.

It should be noted that it has the same structure as the unconsolidated sampling device 1A according to the second embodiment, and is expanded via the support frame portion 54 in the vicinity of the substantially central portion in the longitudinal direction of the side surface of the accommodating portion 38 of the tank portion 2. The unconsolidated sampling device provided with the wings 55 is also unconsolidated by performing the same operation as the operation of the unconsolidated sampling device 1B for the rotary rod 101 of the excavator 100 by the operator 400. The soil sampling device can be operated, and the soil cements 300a and 300b can be reliably collected at the consolidation portion and the pile circumference fixing portion of the excavation hole 200.

Next, as shown in FIG. 21, in order to pull up the rotary rod 101 and the unconsolidated sampling device 1B from the excavation hole 200 while rotating them in the forward direction by the excavator 100, and collect the soil cement 300b contained in the tank portion 2. The unconsolidated sample collection device 1B is moved so that the discharge hole 41 of the unconsolidated sample collection device 1B is located directly above the unconsolidated sample collection box 103.

After the movement, as in the case shown in FIG. 12, the operator 400 pulls the handle portion 52 toward the inflow hole 45d and the outflow of the main body portion 45 of the sample discharge unit 44 that was blocked by the piston portion 49. The soil cement 300b is collected in the unconsolidated sample collection box 103 by discharging the soil cement 300b contained in the tank portion 2 to the outside of the tank portion 3 with the holes 45e opened.

After discharging all the soil cement 300b in the tank portion 2, the handle portion 52 is pushed all the way toward the main body portion 45, so that the main body portion of the sample discharge unit 44 is similarly shown in FIG. The inflow hole 45d and the outflow hole 45e of the 45 are closed by the piston portion 49 to prepare for the next work.

When the purpose is only to collect the soil cement 300b at an arbitrary position (depth) in the pile circumference fixing portion of the excavation hole 200, the unconsolidated sampling device 1B according to the third embodiment is an anchor portion. 42 may not be provided.

1,1A, 1B Unsolidified sampling device 36 Split pin 2 Tank part 37 Washer 3 Rod connection part 38 Storage part 4 Connection plate 39 O-ring 5 1st gouge part 40 Flange part 6 Recession 41 Discharge port 7 Shaft part 42 Anchor Part 8 Bolt hole 44 Sample discharge unit 10, 10A Sliding lid part 45 Main body part 11, 11A Top lid part 46 End plate part 12 Body part 48 Leakage member 13 Lower top plate part 49 Piston part 14 Upper top plate part 50 O-ring 15 Bolt 51 Rod part 16 Nut 52 Handle part 18, 18A Lower lid part 54 Support frame part 19 First body part 55 Expansion wing 20 Flange part 56 Arm part 22 Second body part 58 Tip locking part 23 Partition plate 100 Excavator 24 Storage part 101 Rotating rod 25 O-ring 102 Excavation device 26 Connecting part 103 Unsolidified sample collection box 28 Groove part 200 Excavation hole 30 Shaft 201 Ground 32 1st bearing 300 Unsolidified sample 33 2nd bearing 400 Operator 34 Sleeve 35 Nut

Claims (9)

A tank portion, a rod connecting portion provided at the upper end portion of the tank portion and connectable to a rotary rod, an anchor portion provided at the lower end portion of the tank portion, and an unconsolidated sample provided in the tank portion. It has a sample discharge unit for discharging, the tank portion has a bottomed substantially cylindrical accommodating portion and a slide-type lid portion provided at the upper end portion thereof, and the slide-type lid portion includes an upper lid portion and the said portion. It has a lower lid portion that is arranged below the upper lid portion and is rotatably connected to the upper lid portion, and a first sampling hole is formed in the upper lid portion and protrudes downward. A protruding portion is provided, and a second sampling hole is formed in the lower lid portion at a position corresponding to the first sampling hole, and a groove portion that is slidable while the protruding portion is fitted is provided. The sample discharge unit can move inside the substantially cylindrical main body portion in which an inflow hole communicating with the inside of the tank portion and an outflow hole communicating with the outside of the tank portion are formed and both ends are sealed, and the inside of the main body portion. The unsolidified sample is characterized by having a substantially cylindrical piston portion capable of closing the inflow hole and the outflow hole, and a handle portion connected to the piston portion and capable of moving the piston portion. Sampling device. The unconsolidated sampling device according to claim 1, wherein a plurality of the first sampling holes in the upper lid portion and the second sampling holes in the lower lid portion are formed. The unconsolidated sampling device according to claim 1 or 2, wherein a first sealing member for closing the gap between the upper lid portion and the lower lid portion is provided. A second that closes the gap between the upper lid portion and the lower lid portion and surrounds the peripheral edge of the first collection hole formed in the upper lid portion or the second collection hole formed in the lower lid portion. 2. The unconsolidated sampling apparatus according to any one of claims 1 to 3, wherein a seal member is provided. The unconsolidated sampling device according to claim 3 or 4, wherein the first sealing member has a grease hole capable of supplying a lubricant. Not described in any one of claims 3 to 5, wherein either or both of the first sealing member and the second sealing member are made of a material that reduces friction. Consolidation sampling device. The unconsolidated sampling device according to any one of claims 1 to 6, wherein the accommodating portion has a check valve. Having an expanding wing that is swingably supported on the side surface of the accommodating portion and can be displaced to a reduced diameter state during forward rotation and a larger diameter state during reverse rotation, in place of or together with the anchor portion. The unconsolidated sampling apparatus according to any one of claims 1 to 7, wherein the unconsolidated sampling apparatus is characterized. The expansion blade has an arm portion swingably supported by a support frame portion provided on the side surface of the accommodating portion, and an unconsolidated sample provided at the tip end portion of the arm portion on the side surface of the accommodating portion. The unconsolidated sampling device according to claim 8, further comprising a tip locking portion that can be guided between the arm portion and the arm portion.

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