JPH0646038U - Soil sampling device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a rotary shaft of an excavator that can be detachably mounted without any processing and can collect a desired amount of soil sample. It is in. [Configuration] Circular or elliptical top surface portion 14 and bottom surface portion 1
When the spindle cylinder 1 detachably attached to the rotary shaft 16 of the excavator is attached to the center of the rectangular parallelepiped sample collection case body 2 including the side wall portion 5, the sample collection case body 2 is The side wall 5 is formed with a sample inlet 6 having a sample inlet 4 and a sample outlet lid 8, respectively, and the sample inlet 4 is rotatable about the top 14 and the bottom 15 by a pivot 13. Is supported on the side wall 5
When the movable door 9 that slides along the outer peripheral surface of the above to open and close the sample intake port 4 is attached, the movable door 9 is formed with an abutting portion 11 against the earth and sand protruding outward. A soil sampling device.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a soil sampling device used for confirming a supporting ground layer at the tip of a ready-made concrete pile sunk in the ground.

[0002]

[Prior art]

 The method of constructing ready-made concrete piles is to drill a hole for building a pile in the ground in advance, insert a ready-made concrete pile in this vertical hole, and then hit or consolidate it to form a pre-boring method for the pile foundation. Alternatively, there is a medium excavation method in which an auger screw is inserted into the hollow part of a prefabricated concrete pile and the prefabricated concrete pile is sunk while the auger screw is used for digging. At this time, the depth of the supporting ground is determined by the soil columnar diagram (stratigraphy of the stratum, state of various substances contained in each layer, scale of layer thickness, etc.) prepared by soil tests. The length of the pile is determined for all the piles to be buried in the ground, assuming that there is a support layer at that position.

However, in order to confirm whether or not there is a supporting ground layer, conventionally, fluctuations in the current value of a motor for rotating an auguscrew, sediments adhering to an auger head attached to an auger screw or its tip have been conventionally used. I had no choice but to judge by seeing. Moreover, when the bearing capacity of the pile is expressed by cementing with cement milk, it is necessary to collect the mixed liquid of this cementing portion and investigate its compressive strength. Currently, the core is sampled and a test piece for compression test is manufactured and implemented.

However, in the confirmation of the supporting ground layer by the earth and sand adhered to the auger screw or auger head, when the auger screw or auger head is pulled up, earth and sand around the auger screw or auger head adheres to the auger screw or auger head, or It is difficult to determine the depth of the earth and sand adhering when the auger screw or auger head is pulled up, because the earth and sand adhering to the ground may fall on the way. Moreover, the method of confirming the compressive strength using a core boring machine etc. is expensive, and it was economically impossible to apply it to all piles.

Therefore, as a solution to such a conventional defect, Japanese Utility Model Laid-Open No. 59-129925 discloses a soil sampler in which the lower portion of the cylindrical body of the auger head is used as a soil sample storage chamber. .

[0006]

[Problems to be solved by the device]

 However, the device disclosed in Japanese Utility Model Laid-Open No. 59-129925 has a structure in which the lower part of the auger head itself is processed to form a soil sample storage chamber, so that the conventional auger head can be used as it is. However, there are various problems that it is not versatile, that the structural strength of the auger head may deteriorate, and that the soil sample storage chamber is small and a desired amount of soil sample cannot be collected.

[0007]

[Means for solving problems]

 The present invention has been made to solve the above-mentioned conventional problems, and can be removably mounted without performing any processing on the rotating shaft of an excavator, and is desirable. The aim is to provide a sample capable of collecting a large amount of soil sample, and the gist of the sample is a rectangular parallelepiped sample consisting of a circular or elliptical top and bottom parts and side walls. In the center of the collection case body, a spindle cylinder that is detachably attached to the rotary shaft of the excavator is installed, and the side wall of the sample collection case body is equipped with a sample inlet and a sample outlet cover. Each of the sample inlets is formed, and the sample inlet is rotatably supported on the top and bottom portions by a pivot and slides along the outer peripheral surface of the side wall to open and close the sample inlet. Attach the movable door When ゝ Moni, the movable Dotobira in soil sampling device characterized by forming the butting portion of the soil outwardly projecting.

[0008]

【Example】

 The present invention will be described below with reference to the embodiments shown in FIGS. 1 is a plan view of a soil sampling device according to the present invention, FIG. 2 is a front view of the soil sampling device with a part cut away, and FIGS. 3 and 4 are soil sampling devices according to the present invention for an excavator. FIG. 5 (a) and FIG. 5 (b) are side views with a part cut away showing a state during excavation in which the device is mounted, and FIG.

In the drawing, reference numeral 1 denotes a hexagonal support cylinder that is fitted and fixed to a tip end portion of a rotary shaft of an excavator to be described later, and the support cylinder 1 has a desired height around the support shaft. Two sample collection cases with a generally elliptical shape in plan view are attached, and the inside of the sample collection case 2 is divided into two chambers, left and right, by the spindle cylinder 1. Two sample collection chambers 3, 3 are formed with the spindle cylinder 1 interposed therebetween.

Reference numeral 4 denotes a sample intake port, which is formed on an arcuate side wall portion 5 A near the end of the side wall portion 5 of the sample collection case body 2. The sample intake port 4 of each sample collection chamber 3 is They are respectively formed at opposing positions passing through the center of the support shaft cylinder 1. Reference numeral 6 denotes a sample outlet, which is formed on each of the flat side wall portions 5B opposite to the sample inlet 4, and each sample outlet 6 is attached with a detachable sample outlet lid 8 with a bolt 7. There is.

Reference numeral 9 denotes a U-shaped movable door that opens and closes the sample inlet 4, and has an arc-shaped side wall portion 5A of the sample-collecting case body 2 and an arc-shaped lid portion 10 that has substantially the same shape in section. An abutment portion 11 extending outward from the tip of the arc-shaped lid portion 10, and upper and lower attachments extending horizontally inward from the upper and lower end edges of the arc-shaped lid portion 10 and the abutment portion 11. Each of the mounting portions 12 and 12 is formed with a mounting hole 12A at the tip thereof.

Reference numeral 13 denotes a pivot, which is mounted on the top surface portion 14 and the bottom surface portion 15 of the sample collection case body 2 at the focal position F thereof. The movable door 9 is pivotally mounted so as to be rotatable by inserting the mounting holes 12A formed at the tip ends of the upper and lower mounting portions 12 and 12 into the pivot shaft 13, and thus the movable door 9 is movable. The door 9 has its arc-shaped lid portion 10 slid along the outer peripheral surface of the arc-shaped side wall portion 5A of the sample case body 2, so that the sample inlet 4 can be opened and closed by the movable door 9. become.

FIGS. 3 and 4 show an excavator equipped with the device of the present invention, in which a hollow auger screw 16A and a rotary shaft 16 including an auger head 16B mounted on the tip end of the excavator are used as an air entraining agent. The water mixed with is circulated, and this water is jetted from the tip of the rotary shaft 16. Further, at the upper end of the rotary shaft 16, a drive unit 17 having a drive motor for rotating the rotary shaft 16 is provided.

Reference numeral 18 denotes an impact rammer for striking a ready-made concrete pile 19, and the rotating shaft 16 is rotatably and vertically movable through a central portion of the impact rammer 18. 20 is a stirring blade fixed to the rotary shaft 16, 21 is a cap attached to the upper end of the ready-made concrete pile 19, 22 is a spacer for earth removal interposed between the impact ram 18 and the cap 21. Yes, 23 is the ground, and 24 is a support layer for ready-made concrete piles 19.

Next, the operation of the above embodiment will be described. First, the spindle cylinder 1 of the device of the present invention is fitted and inserted above the tip of the auger screw 16A, and the spindle cylinder 1 is screwed into the spindle cylinder 1 (not shown). It is attached to the auger screw 16A by tightening the bolt. Then, after the auger head 16B is attached to the tip of the auger screw 16A, the drive unit 17 of the excavator is activated to rotate the auger screw 16A and the auger head 16B in the forward direction (clockwise direction), and the auger The water of the air entraining agent is ejected from the tip of the head 16B, and the earth and sand of the ground 23 are excavated and stirred.

According to the excavation of the earth and sand, the ready-made concrete pile 19 smoothly penetrates into the excavation hole. To be done. At this time, the sample collection case body 2 rotates in the forward direction together with the rotary shaft 16. As a result, as shown in (a) of FIG. 5, the abutting portion 11 mounted on the movable door 9 receives the resistance of the earth and sand, so that the movable door 9 is different from the rotation direction of the rotary shaft 16 about the pivot shaft 13. It rotates in the opposite direction, that is, in the counterclockwise direction, and the arc-shaped lid portion 10 closes the sample intake port 4. Therefore, the earth and sand do not enter the sample collection cases 3 and 3.

When the tip of the concrete pile 19 penetrates into the support layer 24, the rotation of the rotating shaft 16 is stopped, and then the rotating shaft 16 is rotated in the opposite direction, as shown in (b) of FIG. In addition, since the impact part 11 mounted on the movable door 9 receives the resistance of the earth and sand, the movable door 9 rotates in the direction opposite to the rotation direction of the rotation shaft 16 about the pivot 13, that is, in the clockwise direction. As the arc-shaped lid 10 moves to open the sample intake port 4, the surrounding earth and sand are taken into the sample collection cases 3 and 3 through the sample intake port 4 respectively.

Next, when the rotary shaft rotary shaft 16 is rotated several times in the forward direction again, the sample intake port 4 is closed by the rotational movement of the movable door 9, as described above. Therefore, after stopping the rotation of the rotary shaft 16, the rotary shaft 16 is pulled up by 1 to 2 m to be fixed, and the impact trough 18 is activated to hit the head of the ready-made concrete pile 19 until the design supporting force is obtained.

The earth and sand of the support layer 24 collected as described above is pulled up from the rotary shaft 16 to the ground, and then the sample outlet cover 8 attached to each sample outlet 6 of the sample collection case 3 is attached to the bolt 7. Is removed and removed, and the sample is taken out from the opened sample outlet 6. Then, when the compressive strength and the like of this sample earth and sand are measured and compared, the depth to the support layer 24 can be accurately confirmed by the excavation length of the rotary shaft 16.

[0020]

[Effect of device]

 As described above, the soil sampling device according to the present invention has a rectangular or rectangular parallelepiped sample collection case body including a circular or elliptical top and bottom portion and a side wall portion and a rotary shaft of an excavator. When the spindle cylinder that is detachably attached is attached, the side wall of the sample collection case body is formed with the sample inlet and the sample outlet with the sample outlet lid, and the sample inlet is attached to the sample inlet. When the movable door is mounted on the top surface and the bottom surface rotatably by a pivot and slides along the outer peripheral surface of the side wall to open and close the sample inlet, Since it has a structure that strikes the earth and sand projecting outward, it is possible to collect a large amount of soil samples of only the support layer that does not contain the earth and sand of other ground, and it is easy for conventional excavators. Can be attached to Because, there is a versatile, there are various effects such as Ruru can be provided at low cost.

[Brief description of drawings]

FIG. 1 is a plan view of a soil sampling device according to the present invention.

FIG. 2 is a front view in which a part of the sampling device is cut away.

FIG. 3 is a partially cutaway side view showing a state during excavation in which the soil sampling device according to the present invention is attached to the excavator.

FIG. 4 is a partially cutaway side view showing a state during excavation in which the soil sampling device according to the present invention is attached to the excavator.

FIG. 5 is an operation explanatory view of the device of the present invention.

[Explanation of symbols]

 1 spindle cylinder 2 sample collection case body 3 sample collection case 4 sample intake port 5 side wall portion 5A arcuate side wall portion 5B flat side wall portion 6 sample outlet port 7 bolt 8 sample outlet port lid 9 movable door 10 arc shaped lid portion 11 Collision part 12 Mounting part 13 Axis 14 Top surface part 15 Bottom part 16 Rotating shaft 16A Augus Cry 16B Auger head 19 Ready-made concrete pile

Claims (1)

[Scope of utility model registration request] 1. A spindle cylinder detachably attached to a rotary shaft of an excavator is attached to a central portion of a rectangular parallelepiped sample collection case body having a circular or elliptical top and bottom portions and a side wall portion. Then, each of the side walls of the sample collection case body is formed with a sample inlet having a sample inlet and a sample outlet lid, and the sample inlet is pivoted on the top surface and the bottom surface. When a movable door that is rotatably supported and slides along the outer peripheral surface of the side wall portion to open and close the sample inlet is attached, the movable door also has an abutting portion with the earth and sand protruding outward. A soil sampling device characterized by forming a soil.