JP2010285765A - Pile hole excavator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain the positions of excavation arms and the state of a pile-hole filler in real time by providing position verification sensors only for the excavation arms and a pile-hole filler verification sensor. <P>SOLUTION: An excavation head 1 is constituted by mounting freely-rocking excavation arms 6 having an excavation blade 7 to a head body 2. Accelerometers 16 are each mounted to upper parts of the excavation arms 6. Ohmmeters 17 are each mounted to the back surfaces of lower parts of the excavation arms 6. Cables from the accelerometers 16 and the ohmmeters 17 are connected to a first sensor node 21. Data from the first sensor node 21 is received by a second sensor node 22 for relay, and information is related by a transmission/reception node of an excavation rod and transferred up to the ground. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a pile hole excavation apparatus having a main body portion and a movable portion, and capable of sending data to the ground by sensing the relative position of the movable portion with a sensor.

  Conventionally, an invention has been proposed in which a excavation head having a movable excavation arm is provided with a sensor in the excavation head and the position data of the excavation arm is transmitted to the ground (Patent Document 1). In this case, the sensor is provided with a first sensor and a second sensor on both the head body and the excavation arm, respectively, and the position of the excavation arm is detected by the two sensors.

  In the pile hole consolidation part, there is a mixture of drilling mud, drilling fluid, water, etc. in the pile hole, injecting cement milk into this, replacing them with cement milk, or stirring with cement milk By mixing, a root hardening layer having a predetermined strength was formed.

JP 2008-150834 A

  In the prior art, since sensing is performed by a combination of two sensors, it is in the soil and there is a need for simplicity. Also, from the viewpoint of construction management, it is possible to grasp in real time the data on the exact shape of the excavated pile hole and the state of the filling in the pile hole, and if it differs from the design And was required to take appropriate measures.

  In addition, it was required to reliably send the data detected by the sensor near the bottom of the pile hole to the ground. The pile hole is filled with fluid with a lot of moisture, and it is desirable to use a wired cable. Normally, the pile hole is several tens of meters long, and the cable is used to lower the excavation head while connecting the excavation rod. However, there is a problem that the structure of the connecting portion becomes troublesome because the connecting work is performed at a site with a lot of moisture.

  The present invention solves the above-mentioned problems because the excavation head is configured by providing the position confirmation sensor only on the excavation arm. Moreover, since the pile hole filling confirmation sensor was provided in the excavation head, the above problems were solved. In addition, since only the connecting portion has a structure capable of wireless transmission, the above-described problems have been solved.

That is, the present invention comprises a drilling rod connected to an excavator and a drilling head connected to the tip of the drilling rod, and the drilling head has a movable excavating arm attached to a head body having a connecting portion with the drilling rod. A pile hole excavator characterized by being configured as follows.
(1) A pile hole filling confirmation sensor is attached to the excavation head.
(2) The excavation rod and / or the excavation head is provided with electric transmission means for transmitting data of the pile hole filling confirmation sensor to the ground.

Further, another invention comprises a drilling rod connected to an excavator and a drilling head connected to the tip of the drilling rod, the drilling head having a drilling arm movable on a head body having a connecting part with the drilling rod. It is a pile hole excavator characterized by being attached and configured as follows.
(1) The excavation arm position confirmation sensor is attached to the excavation arm.
(2) The excavation rod and / or the excavation head is provided with electric transmission means for transmitting data of the position confirmation sensor to the ground.

Another invention comprises a drilling rod connected to an excavator and a drilling head connected to the tip of the drilling rod, the drilling head being movable on a head body having a connecting portion with the drilling rod. Is a pile hole excavator characterized in that it is configured as follows.
(1) A sensor such as a pile hole filling confirmation sensor, a position confirmation sensor or other sensors is attached to the excavation head.
(2) A lower first wireless transceiver and an upper first wireless transceiver that can transmit and receive data to and from the peripheral position of the connecting portion of the excavating rod and the lower end position of the excavating rod connected to the connecting portion, respectively. Install.
(3) A cable for transmitting data from the upper first wireless transceiver at the lower end of the excavation rod to the ground information processing device is disposed on the excavation rod.

Moreover, in the above, it is comprised as follows, It is the pile hole excavation apparatus of Claim 3 characterized by the above-mentioned.
(1) The excavation rod is configured by connecting a plurality of unit rods.
(2) A lower wireless transmitter / receiver is attached to a lower end portion of each unit rod, and the lower wireless transmitter / receiver is formed so as to be able to transmit data to and from the upper wireless transmitter / receiver of the unit rod connected downward.
(3) An upper wireless transmitter / receiver is attached to the upper end of each unit rod, and the upper wireless transmitter / receiver is formed so as to be able to transmit data with the lower wireless transmitter / receiver of the unit rod connected upward.
(4) At each unit rod, the upper radio transmitter / receiver at the upper end and the lower radio transmitter / receiver at the lower end are connected by a cable.
(5) The lower radio transceiver of the lowest unit rod is the lower first radio transceiver.
(6) A cable for sending data from the upper wireless transmitter / receiver to the information processor on the ground is arranged.

  The pile hole filling confirmation sensor in the above uses a resistance, temperature, specific gravity, pH value, viscosity, insulation meter, capacitance meter, etc., to distinguish between water, muddy water, and cement milk.

  The position confirmation sensor in the above uses an inclinometer, an accelerometer, or the like.

  In the present invention, since the excavation head is configured by providing the position confirmation sensor only on the excavation arm, data for confirming the condition of the excavation arm can be collected accurately and easily. Also. If a pile hole filling confirmation sensor is provided on the excavating arm, the state of the pile hole filling can be grasped in real time without sampling. In addition, since only the connecting portion or the connecting portion is wirelessly transmitted and the other positions are wired, data can be transferred from the bottom of the pile hole to the ground with less power consumption.

FIG. 1 is a perspective view of an excavation head according to an embodiment of the present invention. FIG. 2 is also a drilling head, in which (a) is a front view and (b) is a side view. FIG. 3 is a diagram for explaining the measurement of the excavation head. FIG. 4 is a front view of the excavation rod of the present invention. 5A and 5B are diagrams for explaining the measurement bar. FIG. 6 is a graph of the confirmation test of the insulation meter. FIG. 7 is a perspective view of the unit excavation rod. FIG. 8 is a front view of the excavation rod. FIG. 9 is a diagram showing the configuration of the excavator. FIGS. 10A to 10D are views showing the position of the head, and FIG. 10E is a view of the foundation pile. FIG. 11 is a graph (first half) showing data of the acceleration clock. FIG. 12 is a graph (second half) showing data of the acceleration clock. FIG. 13 is a monitor screen of a personal computer. FIG. 14 is a graph showing the angle and depth of the head, the cement milk flow rate, and the like.

  An embodiment for carrying out the present invention will be described with reference to the drawings.

1. Drilling head configuration

(1) The head body 2 has fixed digging blades 3 and 3 projecting downward at the lower end of the base, and has a projection 4 connected to the digging rod at the upper end of the base. The base portion of the head main body 2 is formed narrower toward the lower side following the upper rectangular parallelepiped portion, and the lower portion forms a huge portion protruding in the lateral direction. Fixed excavation blades 3 and 3 are projected on the lower surface of the enormous portion.
(2) The horizontal shafts 10 and 10 project from the front of the rectangular parallelepiped portion of the base of the head body 2, and the upper end portions of the excavating arms 6 are rotatably attached to the horizontal shafts 10, respectively.
The excavation arm 6 has an upper part formed substantially vertically, and an intermediate part is formed by bending toward the head main body 2 side so that both excavation arms 6 and 6 approach along the narrow part of the head main body 2. The lower part is bent outward and downward so as to be separated from the head body 2. A horizontal shaft 10 is attached to the upper part of the excavating arm 6, and excavating blades 7, 7 facing outward and downward along the lower part are attached to the lower end.

(3) Attach an accelerometer (position sensor for excavation arm 6) 16 to the vertical outer surface of excavation arm 6. Further, an insulation meter (filling measurement sensor) 17 is attached to the lower back surface (the surface on the head body side) of the excavation arm 6. Cables from the accelerometer 16 and the insulation meter 17 are connected to a first sensor node 21 provided in the upper part of the excavation arm 6. The first sensor node 21 is provided with an antenna so that data can be transmitted. Data transmitted from the first sensor node 21 can be received by the second sensor node 22 for relay provided in the upper part of the head body 2.
An antenna is formed on the second sensor node 22 so that it can be received by the lower antenna 39 of the transmission / reception node 36 of the excavation rod 41. The first sensor node 21 and the second sensor node 22 are covered with a waterproof case, and water resistance and shock resistance are ensured.

(3) The operation projection 8 is formed on the upper end of the excavation arm 6. In the head main body 2, an operation shaft 11 is formed in parallel with the horizontal shaft 10 above the horizontal shaft 10, and an L-shaped operation tool 12 is rotatably installed on the operation shaft 11. One end 13 of the L-shaped operating tool 12 abuts on the operation protrusion 8, and the other end 14 connects the lower end of the measuring bar 27 arranged in parallel with the excavation rod 41 (FIG. 4). The lower end position of the measurement bar 27 is rotated forward during the excavation of the pile hole shaft and is at the height H1 with the excavation arm 6 open (FIG. 4 (a)). It rotates and is at height H2 with the excavating arm open (FIG. 4 (b)).
Therefore, when the upper end of the measurement bar 27 is positioned on the ground 55, the spread state of the excavating arm 6 can be visually observed from the ground 55.

(4) The excavation head 1 is configured as described above (FIG. 1). The power supply to the first sensor node 21 can be supplied from various batteries in addition to the storage battery, or the power can be supplied by generating electricity by swinging or rotating the excavation head 1. The same applies to the supply of power to the second sensor node 22.

(5) The data of the acceleration clock 16 substantially coincided with the data using the L-shaped operation tool 12 and the measurement bar 27 (FIGS. 5, 11, and 12). In the preliminary experiment, the insulation meter 17 could distinguish water and cement milk (1: 7, 1: 5) having different concentrations (FIG. 6).

2. Drilling rod 41

(1) The unit excavation rod 31 is formed with a connecting convex portion 32 at the upper end of the rod body and a connecting concave portion 33 at the lower end, and the connecting concave portion 33 and the connecting convex portion 32 have a structure that can be fitted to each other. In addition, support portions 34 and 34 to which the kneading drum is attached are formed in the middle portion of the rod body.

(2) The transmission / reception node 36 and a storage battery for supplying power to the transmission / reception node 36 are built in the middle part of the unit excavation rod 31. A lower antenna 39 for receiving data from the transmission / reception node 36 of the unit excavation rod 31 located below is attached to the tip of a cable 37 extending upward from the transmission / reception node 36, and the lower antenna 39 is connected to the connecting recess 33 of the unit excavation rod 31. Provide around. Further, an upper antenna 38 for transmitting data to the transmission / reception node 36 of the unit excavation rod 31 located above is attached to the tip of a cable 37 extending downward from the transmission / reception node 36, and the upper antenna 38 is connected to the unit excavation rod 31. Provided around the convex recess 33 (FIG. 7).
As described above, the excavation rod is composed of a predetermined number of unit excavation rods (FIGS. 7 and 8).

(3) The power supply to the transmission / reception node may be performed by providing power generation means that can generate power by rotating or vertically moving the rod body in place of various batteries, and supplying power from the power generation means to the transmission / reception node. Yes (not shown).

3. Ready-made piles 43

  The ready-made pile 43 is made of concrete, and a lower-diameter lower shaft portion is continuously provided at the lower end of the shaft portion of the pile body. The lower end portion of the shaft portion, the step portion between the shaft portion and the lower shaft portion, and the midpoint of the lower shaft portion Each is formed with an annular protrusion (FIG. 10E).

4). Drilling method

(1) A predetermined number of unit excavation rods 31 to which a kneading drum and a kneading bar are attached are connected in the vertical direction, and the connection convex portion 4 of the excavation head 1 is connected to the lower end (connection concave portion) of the lowermost unit excavation rod 31. The upper end of the unit excavation rod 31 at the uppermost stage is connected to the auger 61 of the pile driving machine 60 (FIGS. 9 and 8).

(2) The auger 61 of the pile driving machine 60 is equipped with a worker 62 for measuring the depth and the descending speed of the auger 61, and the sensor information for measuring the position of the wire 62 is wired or wirelessly. Input to the PC in the operator room.
Further, a hose 63 for supplying cement milk or water from the cement milk plant is supplied into the excavating rod 41 via the auger 61, and a flow meter 64 of the fluid flowing through the hose is provided in the pile driving machine 60, and the flow data. Is input to the PC in the operator room of the pile driver by wire or wireless. Further, the rotation speed and power value (current value, etc.) of the auger 61 are also input to the personal computer in the operator room of the pile driving machine by wire or wirelessly.

(3) Subsequently, if the auger 61 is lowered while rotating, the excavation arm 6 of the excavation head 1 opens to one side by earth pressure and excavates the shaft portion 52 of the pile hole 51 (FIG. 10 (a)). . At this time, water is supplied from the hose 63 to the lower end of the head body 2.
Various data during excavation are all input to the personal computer in the operator room, and the various data are displayed on the personal computer screen in real time (FIGS. 13 and 14). At this time, data on the accelerometer 16 of the head main body 2 and data indicating that the pile hole is filled with water are also supplied. Further, it can be confirmed from the accelerometer 16 that the excavating arm 8 is normally opened (FIGS. 11, 13, and 14).

(4) At this time, the data from the head main body 2 is transmitted from the first sensor node 21 of the excavating arm 6 to the second sensor node 22 of the head main body 2, and from the second sensor node 22 to the lowermost unit rod 31. The signal is received by the lower antenna 39 of the transmission / reception node 36 and sent to the transmission / reception node 36. Here, the movable part is transmitted wirelessly, is a one-to-one transmission, and has a short distance of about 20 cm to 50 cm, so that power consumption is small and accurate transmission / reception is performed.
In addition, data is transferred between the transmission / reception nodes 36 and 36 between the unit excavation rods 31 and 31 via the upper and lower antennas 38 and 39, and the upper antenna 38 of the uppermost unit excavation rod 31 is connected to the operator room. Input to the computer. Also in this case, since the radio distance is a short distance, processing is performed reliably and with low power consumption. Further, data input to the personal computer in the operator room is collectively displayed on the screen (FIG. 13). Further, data input to the personal computer in the operator room is transferred to the personal computer in the office set inside and outside the construction site (FIG. 9).

(5) Although the unit excavation rods 31 and 31 are added according to the excavation of the pile hole 51, since the electrical connection to the connecting portions 32 and 33 is unnecessary, the excavation rod 41 is simply mechanically connected as in the prior art. Can be extended. Even when the unit excavation rod 31 is added, data processing can be performed in the same manner without any trouble in wireless data transfer.

(6) Once excavation of the pile hole shaft 52 is completed, stop the rotation of the auger. Subsequently, when the head is pressed against the bottom of the pile hole and rotated positively for a moment, the stopper of the excavating arm is released and the excavating arm is once greatly opened to one side. Subsequently, when the auger is reversed, the excavation rod and the excavation head are also reversed, and the excavation arm swings to the opposite side due to earth pressure, so that enlarged excavation can be performed (FIG. 10B). The data of the acceleration sensor during this time appears accurately in the data of the inclination angle of 15:54 to 15:57 on the horizontal axis (time) of the graph of the figure (FIG. 12).

(7) When excavation of the root consolidation part 53 is completed, once the excavation head 1 is positioned at the bottom of the pile hole, cement milk is gently injected from the discharge port at the lower end of the head body, and the excavation mud in the consolidation part While being replaced with cement milk, the mixture is stirred and mixed to make the cement milk in the root-solidified portion uniform (FIG. 10C). As in the case of the acceleration clock 16, the data indicating that the pile 17 is filled with cement milk is sent to the personal computer in the operator room and filled with cement milk. It can be visually observed (FIG. 13).

(8) Subsequently, the auger 61 is switched from the reverse rotation, and while slowly rotating forward, the pile hole shaft 52 is filled with the pile circumference fixing liquid and stirred and mixed while the drill rod 41 and the drill head 1 are grounded. Pull up to 55 (FIG. 10D).

(9) Subsequently, the ready-made pile 43 is lowered into the pile hole, and the two annular ribs are positioned at the root-fixed portion, and are laid down (FIG. 10 (e)).

(10) When the root hardening liquid and the pile circumference fixing liquid are solidified as described above, a foundation pile structure is constructed.

DESCRIPTION OF SYMBOLS 1 Excavation head 2 Head main body 3 Fixed excavation blade 4 Connection convex part 6 Excavation arm 7 Excavation blade 8 Operation protrusion 10 Horizontal axis 11 Operation axis 12 L-shaped operation tool 13 One end 14 of L-shaped operation tool The other end of L-shaped operation tool 16 Accelerometer 17 Insulator 21 First sensor node 22 Second sensor node 27 Measuring bar 31 Unit excavation rod 32 Connecting convex part (upper)
33 Connection recess (bottom)
34 Supporting part 36 Transmission / reception node 37 Transmission / reception node cable 38 Transmission / reception node upper antenna 39 Transmission / reception node lower terminal 41 Drilling rod 43 Pre-made pile 51 Pile hole 52 Pile hole shaft part 53 Pile hole bottom part 55 Ground 60 Pile driver 61 Auger 62 Wire 63 Hose 64 Flow meter

Claims (4)

A drilling rod connected to the excavator and a drilling head connected to the tip of the drilling rod. The drilling head has a movable excavating arm attached to a head body having a connecting portion with the drilling rod as follows. A pile hole excavator characterized by comprising.
(1) A pile hole filling confirmation sensor is attached to the excavation head.
(2) The excavation rod and / or the excavation head is provided with electric transmission means for transmitting data of the pile hole filling confirmation sensor to the ground. A drilling rod connected to the excavator and a drilling head connected to the tip of the drilling rod. The drilling head has a movable excavating arm attached to a head body having a connecting portion with the drilling rod as follows. A pile hole excavator characterized by comprising.
(1) The excavation arm position confirmation sensor is attached to the excavation arm.
(2) The excavation rod and / or the excavation head is provided with electric transmission means for transmitting data of the position confirmation sensor to the ground. A drilling rod connected to the excavator and a drilling head connected to the tip of the drilling rod. The drilling head has a movable drilling arm attached to a head body having a connecting portion with the drilling rod, and Pile hole excavator characterized by comprising:
(1) Attach sensors such as pile hole filling confirmation sensor, position confirmation sensor or other sensors to the excavation head.
(2) The lower first wireless transceiver and the upper first wireless transceiver that are capable of transmitting and receiving data to and from the peripheral position of the connecting portion of the excavating rod and the lower end position of the excavating rod connected to the connecting portion, respectively. Install.
(3) A cable for sending data from the upper first wireless transmitter / receiver at the lower end of the excavation rod to the ground information processing device is disposed on the excavation rod. The pile hole excavation device according to claim 3, which is configured as follows.
(1) The excavation rod is configured by connecting a plurality of unit rods.
(2) A lower wireless transmitter / receiver is attached to a lower end portion of each unit rod, and the lower wireless transmitter / receiver is formed so as to be able to transmit data to and from the upper wireless transmitter / receiver of the unit rod connected downward.
(3) An upper wireless transmitter / receiver is attached to the upper end of each unit rod, and the upper wireless transmitter / receiver is formed so as to be able to transmit data with the lower wireless transmitter / receiver of the unit rod connected upward.
(4) At each unit rod, the upper radio transmitter / receiver at the upper end and the lower radio transmitter / receiver at the lower end are connected by a cable.
(5) The lower radio transceiver of the lowermost unit rod is the lower first radio transceiver.
(6) A cable for sending data from the upper wireless transmitter / receiver on the uppermost unit rod to the information processor on the ground is arranged.