JP2006183379A - Underground sampling tool and ground excavation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underground sampling tool installable in a tip bit part without removing the tip bit part of an excavator, reducing cost with a simple structure, capable of sampling even a sample of any depth in the ground, and capable of easily agitating soil cement again. <P>SOLUTION: This sampling tool has a sampling pipe 10 having a tubular part 12 and an orifice part 14, a cover body 16 for blocking up an opening part of the orifice part, and an installing part 30 for installing the sampling pipe on an agitating blade or an excavating blade of the tip bit part of the excavator. The installing part is formed in substantially parallel between a shaft of the sampling pipe and a surface of the agitating blade or the excavating blade, and installs the sampling pipe on the agitating blade or the excavating blade so as to become substantially orthogonal between the shaft of the sampling pipe and a diameter of the tip bit part of the excavator. The cover body opens when the tip bit part of the excavator normally rotates in the ground, and closes when the tip bit part reversely rotates. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sample collection tool for collecting a sample such as soil from the ground in ground improvement work and the like, and a ground excavation system using the same.

  When constructing low-rise housing, middle-rise housing, and other structures, the soil of the original ground is solidified by stirring and mixing with the machine while injecting the soil cement mixed with cement-based solidifying material and water into the raw ground, There may be ground improvement work to strengthen the ground. As such ground improvement construction methods, there are a deep mixing method, a columnar improvement method, a cast-in-place concrete pile method, a soil cement synthetic steel pipe pile method and the like.

  In the ground improvement work described above, a sample of soil mixed with soil cement and soil is usually collected before the soil cement and soil injected into the ground solidify. Conventionally, for example, those disclosed in Patent Documents 1 to 5 have been proposed as sample collection devices for collecting samples such as soil from the ground.

  In a sample collection device for soil or the like described in Patent Document 1 (Japanese Patent Laid-Open No. 6-128931), an upper portion of the sampling device is connected to an upper rod of the excavator and a excavation member is attached to the lower portion so as to have a predetermined depth from the ground. This is to drill a hole. The sampler body is provided with an opening on the surface of a cylindrical member, a lid member is provided so as to be openable and closable with respect to the opening, and an excavation blade at the tip of the lid member is provided so as to protrude from the surface of the cylinder. Then, in the middle of creating the excavation hole with the excavation member, by rotating the sampling device in the reverse direction, the lid member is opened via the hinge, and the soil is scraped and collected inside the sampler body through the lid member. The sample is taken by rotating it forward and pulling up while closing the lid member.

  The sample collection device described in Patent Document 2 (Japanese Patent No. 2922434) is a drilling rod, a sampling tube connected to the outer peripheral surface of the drilling rod and having a lower end surface open, and detachable in the sampling tube. The inner cylinder that is inserted and the lower end surface for taking in the sample is opened and the outer peripheral surface of the excavating rod are fixed to the lower end surface position of the sampling tube, and the lower end surface of the sampling tube and the inner cylinder is closed when the excavating rod rotates forward. It consists of a lid, and the sampling tube takes the sample into the inner cylinder as the excavation rod descends after reverse rotation, and pulls up the sample in the inner cylinder to the ground as it rises after normal rotation.

  In the sample collection device described in Patent Document 3 (Japanese Patent Laid-Open No. 11-326156), a collection tube is attached to a lower end of an operation shaft that is mounted on a base machine or the like and freely movable up and down via a hollow attachment shaft. It is what has been. A required number of sampling ports are formed in the side portion of the sampling tube, and a lid that is opened and closed by a fluid pressure cylinder provided in a hollow mounting shaft is mounted on the sampling port.

  A sample collection device such as soil described in Patent Document 4 (Japanese Patent Laid-Open No. 2002-54129) is slidably provided on a cylindrical collection container having an opening on a side surface and an upper portion in the collection container. The upper piston that can close the opening, the lower piston that is slidably provided in the lower part of the collection container, the operating rod that moves the upper piston, and the wire that connects the piston. Then, the operating rod is pulled up, the upper piston is raised, and the sample soil is caused to flow into the collection container from the opening by the negative pressure suction force. Further, the upper piston is raised, the lower piston is positioned above the opening, and the sample soil is sampled while being sandwiched between the upper piston and the lower piston in the upper part of the collection container.

  In the sample collection device described in Patent Document 5 (Japanese Patent Laid-Open No. 10-131162), three pipe holders are arranged in an insertion tube to be inserted into a soil column whose ground has been improved, and a sample is collected in each holder. A pipe is provided. The holder is provided so as to be able to protrude and retract with respect to the insertion tube member. The holder is protruded by rotating the insertion tube in one direction, and the mixed soil is accommodated in the pipe while being pulled up to a predetermined height. The holder is accommodated in the insertion tube and pulled up.

JP-A-6-128931 Japanese Patent No. 2922434 JP-A-11-326156 JP 2002-54129 A JP-A-10-131162

  However, each of the conventional sampling devices described above has problems. That is, the sampling devices of Patent Documents 1 to 5 all remove the tip bit portion of the excavator and attach the sampling device to the excavator. In addition, these sampling devices are designed to remove the tip bit portion of the excavator and attach the sampling device to the drill bit, so even if a non-uniform portion such as a cavity is generated in the soil cement column after sampling, the soil cement Since the column cannot be re-stirred, the quality of the soil cement column may be insufficient. Furthermore, all of these sampling devices are very expensive.

  In addition, the sampling device of Patent Document 3 incorporates a fluid pressure cylinder mechanism and the like inside, and the mechanism is complicated, so that soil, soil cement and the like are easily clogged therein, and operability such as opening and closing of the lid is poor.

  The sampling device of Patent Document 4 is to open and close a sampling container with an operating rod or an operating wire to take in a sample. The mechanism is complicated, and soil, soil cement, etc. are easily clogged inside, and operability such as opening and closing of a lid. Is bad.

  The sampling device of Patent Document 5 needs to be pulled up when collecting a sample. If the sample is hard, there is a problem that the sample is difficult to enter inside, and it is difficult to collect a sample in each layer.

  In general, since it is difficult to collect a sample of the lower layer of the ground, only samples of the surface layer of the ground are collected in the ground improvement work of structures such as low-rise housing and middle-rise housing with relatively small loads. is the current situation. In ground improvement works, numerical data is often completely different in support strength depending on the depth of the ground depending on the strata and geology, and the data in the middle and bottom layers of the ground are often extremely bad. Therefore, if the intermediate layer and the lowermost layer are evaluated using only the data on the surface layer of the ground, there is a possibility of causing a large error.

  The present invention has been made in view of the above-described circumstances, and can be attached to the tip bit portion without removing the tip bit portion of the excavator, and the structure is simple and inexpensive. An object of the present invention is to provide an underground sample collection tool and a ground excavation system that can collect samples at a depth of 5 mm and can easily re-stir soil cement.

  In order to achieve the above object, the present invention closes a sampling tube having a tubular portion and a throttle portion having a gradually decreasing diameter continuously provided on one axial end side of the tubular portion, and an opening of the throttle portion of the sampling tube A lid that can be opened and closed, and a mounting portion that removably attaches the sampling tube to a stirring blade or a drilling blade of a tip bit portion of a drilling device, and the mounting portion includes a shaft of the sampling tube and the stirring blade Alternatively, the sampling tube is attached to the agitating blade or the excavating blade so that the surface of the excavating blade is substantially parallel and the axis of the sampling tube and the diameter of the tip bit portion of the excavating apparatus are substantially orthogonal to each other. And the lid is closed when the tip bit portion of the excavator rotates forward in the ground, and opens when it rotates in reverse.

  The present invention also includes the above-described sample collection tool of the present invention, construction name, construction address, construction person name, construction date, sample collection start time, sample collection end time, sample at the time of underground sample collection A drilling device equipped with a management device for acquiring and storing one or more types of management data selected from a sampling pile number, a sampling depth, a tip bit partial rotation speed, a tip bit partial torque, and a tip bit partial press-fit pressure; The sample collection tool is attached to the agitating blade or excavation blade of the tip bit portion of the excavator, and an underground sample is collected, and acquisition of the one or more types of management data at this time and Provided is a ground excavation system characterized in that storage is performed by the management device.

  The underground sampling tool and the ground excavation system according to the present invention can be attached to the tip bit portion without removing the tip bit portion of the excavator, and the structure is simple and inexpensive. Samples of any depth can be taken, and the soil cement can be easily re-stirred.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following examples. FIG. 1 is a front view showing an embodiment of an underground sample collection tool according to the present invention, and FIG. 2 is a right side view of the sample collection tool.

  In the figure, 10 indicates a collection tube. The sampling tube 10 includes a cylindrical tubular portion 12 having a constant inner diameter and an outer diameter, and a conical truncated constriction portion that is connected to one end side in the axial direction of the tubular portion 12 so that the inner diameter and the outer diameter gradually become smaller. 14.

  In the figure, 16 is an openable / closable disk-shaped lid that closes the opening 18 of the throttle section 14 of the sampling tube 10, and 20 is a plate-shaped opening adjustment stopper fixed to the outer surface of the lid 16. In the figure, reference numerals 22 and 22 denote a pair of parallel plate-like lid mounting plates fixed to the outer surface of the throttle portion 14 of the sampling tube 10. A hinge insertion hole 24 is formed in the opening adjustment stopper 20 and the lid attachment plate 22, and the opening adjustment stopper 20 is disposed between the lid attachment plates 22 and 22 to open the pin-shaped hinge 26. The lid 16 is attached to the sampling tube 10 so as to be openable and closable by being inserted into the degree adjusting stopper 20 and the hinge insertion hole 24 of the lid mounting plate 22 and bending both ends of the hinge 26 at substantially right angles. The opening degree adjusting stopper 20 adjusts the opening degree of the lid body 16 when the rear upper end portion 28 contacts the outer peripheral surface of the throttle portion 14 when the lid body 16 is opened.

  In the figure, reference numeral 30 denotes a mounting portion for detachably attaching the sampling tube 10 to a stirring blade or a drilling blade of a tip bit portion of the drilling device. The attachment portion 30 has two U-shaped fixing plates 32 fixed to the outer peripheral surface of the sampling tube 10 and two screw holes 34 screwed into screw holes 34 formed in the upper plate portion of the fixing plate. Bolts 36 and 36 are provided.

  The sample collection tool of this example is used by being attached to the stirring blade or the excavation blade of the tip bit portion 42 of the excavator 40 as shown in FIG. 3, for example. 4 is an enlarged view of the tip bit portion 42, in which 44 is a rotating shaft, 46 is a stirring blade, 48 is a drilling blade, 50 is a drilling blade, and 52 is a soil cement discharge port.

  When the sample collection tool of this example is attached to the agitating blade 46 or the excavation blade 48 of the tip bit portion 42 of the excavator 40, the outer peripheral surfaces of the bolts 36 and 36 of the sample collection tool attachment portion 30 and the tubular portion 12 of the collection tube 10. The agitating blade 46 or the excavating blade 48 is inserted between the bolts 36 and 36, and the bolts 36 and 36 are advanced to advance, so that the agitating blade 46 or the excavating blade is interposed between the tips of the bolts 36 and 36 and the outer peripheral surface of the tubular portion 12. The sample collection tool is attached to the stirring blade 46 or the excavation blade 48 by sandwiching 48.

  When the sample collection tool of this example is attached to the stirring blade 46 or the excavation blade 48, the shaft 54 of the sampling tube 10 and the surface of the stirring blade 46 or the excavation blade 48 are substantially parallel, and the shaft 54 of the sampling tube 10 The diameter 56 of the tip bit portion of the excavator is substantially orthogonal.

  When the sample collection tool of this example is attached to the stirring blade 46 or the excavation blade 48 and the tip bit portion is rotated forward (rotation in the direction A in FIG. 1), the lid body 16 is closed. Moreover, if it reversely rotates (rotation to the B direction of FIG. 1), the cover body 16 will open.

  There is no limitation on the material and size of the sample collection tool of this example, and it can be appropriately determined according to the purpose, etc., but as the material, metals such as iron, stainless steel, and aluminum are usually used. Moreover, the structure of a cover body and an attaching part is not limited to the said example, You may change into another structure.

Next, an example of a sample collection method using the sample collection tool of this example will be described.
(1) First, as described above, the sample collection tool is attached to the stirring blade or the excavation blade of the tip bit portion of the excavator.
(2) Improving the ground using solidified material (cement), inserting the tip bit part of the excavator into the soil cement column before solidification, and lowering the sample collection tool to the target depth while rotating the tip bit part forward Let The lid is closed during this lowering.
(3) The tip bit portion is reversely rotated at the position of the target depth, and the sample is captured in the collection tube of the sample collection tool. At this time, the lid opens, and the sample enters the collection tube from the opening of the tubular portion, and the excess sample exits from the opening of the throttle portion. Therefore, the inside of the sampling tube is completely replaced with mixed soil at the target depth.
(4) Next, the lid is closed in the forward rotation, and the sample collection tool is raised to the ground while continuing the forward rotation of the tip bit portion in this state. Then, the sample in the sample collection tool is collected in a predetermined sample container.
(5) In order to prevent uneven parts such as cavities from occurring in the soil cement pillar and to ensure the quality of the soil cement pillar, after the sample is taken, the soil cement pillar is moved to the bottom by the tip bit part. Re-stir. In this case, the sample collection tool may remain attached to the tip bit portion or may be detached from the tip bit portion.

  When collecting the sample, turn on the power of the management equipment installed in the drilling rig, input the construction name, construction address, name of the person in charge of construction, the date of construction, While checking the screen of the management device, confirm the sample collection pile number, sample collection depth, tip bit partial rotation speed, tip bit partial torque, tip bit partial press-fit pressure, etc., and perform the operations (1) to (5). In this case, it is possible to obtain data obtained by re-stirring the soil cement column to the bottom after the sample is collected.

  Also, by putting the data card of the management device into the computer, the construction name, construction address, construction person name, construction date, construction date, sampling start time, sample collection pile number, sample Data such as sampling depth, tip bit partial rotation speed, tip bit partial torque and tip bit partial press-fit pressure can be obtained as a list and a graph. An example of the graph is shown in FIG. Furthermore, data obtained by re-stirring the soil cement column to the bottom after sample collection can be obtained as a graph over time.

This embodiment has the following effects.
1. It is very easy to attach / detach the sample collection tool to / from the tip bit portion of the drilling device.
2. Since it is not necessary to remove the tip bit portion of the drilling device, labor and time are not required for attaching and detaching the sample collection tool. Moreover, a sample can be easily taken for each pile.
3. A sample at an accurate depth can be obtained by a management device installed in the excavator.
4). There is no limitation on the sampling depth of the sample, and the sample can be collected up to the depth range of excavation.
5). The structure of the sample collection tool is simple, there is no clogging with soil, soil cement, etc., and operability is very good.
6). Samples can be collected in a short time.
7). A sample at an arbitrary depth for each pile can be easily collected.
8). In the past, it was difficult to collect samples of the lower layer of the ground, so in the residential ground improvement construction industry, only the samples of the surface layer of the ground are currently collected, but the sample collection tool of this embodiment is used. Then, samples of the surface layer, intermediate layer and lower layer of the ground can be easily collected.
9. The management device provided in the excavator can collect a sample at an accurate depth to the bottom of the excavation.
Management data (construction name at the time of sample collection, construction address, name of the person in charge of construction, date of construction, sample collection start time, sample collection end time, sample collection pile number, sample by combining with 10 management system It is possible to acquire, check and save data such as sampling depth, tip bit partial rotation speed, tip bit partial torque and tip bit partial press-fitting data).
11. Since the tip bit portion of the excavator is not removed, the soil cement column can be easily re-stirred to the lowermost part after the sample is collected, so that the quality of the soil cement column can be sufficiently ensured.
12 By re-stirring the soil cement column to the lowest part, the quality of the soil cement column can be sufficiently ensured even if the soil cement column has a non-uniform portion such as a cavity after the sample is collected.

It is a front view which shows one Embodiment of the underground sample collection tool which concerns on this invention. It is a right view of the sample collection tool of FIG. It is the schematic which shows an example of a drilling apparatus. It is a perspective view which shows an example of the front-end | tip bit part of a digging apparatus. It is an example of the graph of management data.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Sampling pipe 12 Tubular part 14 Restriction part 16 Cover body 18 Opening part 26 Hinge 30 Attachment part 32 Fixing plate 36 Bolt 40 Drilling device 42 Tip bit part 46 Stirring blade 48 Drilling blade

Claims (4)

  A sampling tube having a tubular portion and a throttle portion with a gradually decreasing diameter that is connected to one axial end of the tubular portion, an openable / closable lid that closes an opening of the throttle portion of the sampling tube, and the sampling tube And a mounting portion that is detachably attached to the agitator blade or excavator blade of the tip bit portion of the excavator, and the axis of the sampling tube and the surface of the agitator blade or excavator blade are substantially parallel to the attachment portion. The sampling tube is attached to the stirring blade or the drilling blade so that the shaft of the sampling tube and the diameter of the tip bit portion of the drilling device are substantially orthogonal to each other, and the lid body is a tip of the drilling device. An underground sampling tool, which is closed when the bit part rotates forward in the ground and opens when the bit part rotates backward.   The mounting portion includes a fixing plate having a U-shaped cross section fixed to the outer peripheral surface of the sampling tube and a bolt attached to the fixing plate so as to be able to advance and retreat, and the tip of the bolt and the outer peripheral surface of the sampling tube 2. The underground sample collection tool according to claim 1, wherein the sampling tube is attached to the stirring blade or excavation blade with the stirring blade or excavation blade interposed therebetween.   The underground sample collection tool according to claim 1 or 2, wherein the lid is attached to the collection tube by a hinge.   The sample collection tool according to any one of claims 1 to 3, and the construction name, construction address, name of the person in charge of construction, date of construction, sample collection start time, sample collection end time Excavation equipped with a management device that acquires and stores one or more types of management data selected from the sample collection pile number, sample collection depth, tip bit partial rotation speed, tip bit partial torque and tip bit partial press-fit pressure A sample collecting tool is attached to the agitating blade or excavating blade of the tip bit portion of the excavating device, and an underground sample is collected. A ground excavation system characterized in that acquisition and storage are performed by the management device.

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