JP2008122118A - Enlarged-diameter size measuring instrument of hole for enlarged-diameter cast-in-place pile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an enlarged-diameter size measuring instrument for measuring the size, etc. of a pile bottom part of a hole for an enlarged-diameter cast-in-place pile made by waterless-digging the ground. <P>SOLUTION: This enlarged-diameter size measuring instrument comprises an imaging means mounted on an end of a kelly-bar, etc. of a boring machine and housed in a casing, a rule for pile diameter checking placed outside the casing, a tilting means for the rule, and an output display means with an image taken by the imaging means projected thereonto. The casing is mounted on the end of the kelly-bar, etc., and moved downward in the hole for the pile in a state of small-diameter position with the rule upward inclined. When the casing reaches an enlarged-diameter part, the rule is gradually brought down to a horizontal position and brought into contact with a hole wall, and the kelly-bar is turned. A state in which the rule is in contact with the hole wall is imaged by the imaging means over all around the hole wall and is projected onto the display means. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention belongs to the technical field of an apparatus for confirming the shape and the like of a pile bottom portion of a diameter-expanded cast-in-place pile hole that has been dug in the ground, and more specifically, is brought into contact with the hole wall of the enlarged diameter portion. The present invention relates to an enlarged-diameter measuring device using a pile diameter confirmation ruler and an imaging means for visually recognizing a situation where the pile diameter confirmation ruler contacts a hole wall.

Conventionally, cast-in-place concrete piles including expanded piles, underground continuous walls, caissons, etc., which have been excavated in the ground, such as spilled soil and slime in the expanded diameter part (or expanded part) A method and apparatus for confirming the size and shape of a deposit is widely disclosed.
In particular, in an enlarged diameter cast-in-place pile, it is necessary to confirm whether the enlarged diameter portion has a required diameter, and certainty is required for the confirmation method and apparatus.

  For example, in Patent Documents 1 and 2, the tip of a wire (or guide rope) that is filled with bentonite liquid or muddy water in a drilling hole, is suspended from the ground into the drilling hole, and is stretched vertically in the hole. Discloses a method for measuring and confirming the shape of the pile hole by attaching an ultrasonic rangefinder.

  Further, in Patent Document 3, a penetrating needle with a penetrating resistance detector and a plurality of contact pressure detectors are attached to the tip of an arm of a drilling machine equipped with an angle detector that can be freely expanded and contracted, and excavated. After being fixed at a predetermined depth of the hole, when the tip of the arm moves in a predetermined angle direction and the contact pressure detector detects a predetermined pressure, the penetrating needle protrudes from the tip to the surface of the excavation hole, and the angle of the arm An apparatus is disclosed in which a penetration resistance value is transmitted and processed by a control device to measure the shape and the surface strength of the hole.

Furthermore, in Patent Document 4, in order to measure the shape of the excavation surface, a projector that is installed on the front surface of the excavation surface and projects a large number of spots on the excavation surface and is set apart from the projector. The video camera that captures the light spot, the position on the imaging surface of the light spot obtained by imaging the light spot on the cross section with the video camera, and the virtual plane that is set to a known distance are projected from the projector A method and apparatus for calculating a three-dimensional shape of an excavation surface by calculating a deviation from a position on the imaging surface of a light spot, which is a standard that can be generated, using a computer, and calculating a relative deformation amount of the excavation surface with a virtual plane Is disclosed.
Japanese Patent Laid-Open No. 57-110914 JP-A-8-68620 Sho 59-52090 Japanese Patent Laid-Open No. 60-2180816

  The confirmation method using ultrasonic waves in Patent Documents 1 and 2 has several problems. First, the output result is a waveform, and the waveform value shows only an approximate result. Therefore, it is impossible to accurately confirm whether the shape and diameter of the enlarged diameter portion of the hole ensure the design value. In addition, since it is necessary to be filled with a liquid with high specific gravity such as bentonite liquid or muddy water, its transportation, filling and post-treatment work is very troublesome and difficult, and there is a possibility of affecting the environment of the soil. .

  In the technique described in Patent Document 3, the control device calculates the measurement values obtained by the penetration needle with penetration resistance attached to the tip of the arm machine equipped with the angle detector and a plurality of contact pressure detectors. This is a method for measuring the shape and surface strength of the holes. Therefore, since many machines are required, the work of installing each machine is very difficult and costly. In addition, because it is a measurement by contact pressure, there is a risk of erroneous detection due to instrument failure, etc., and the shape of the enlarged diameter part over the entire circumference is judged and predicted from a part of contact. It is very difficult to measure whether the accurate shape, in particular, the diameter dimension of the enlarged diameter portion is ensured over the entire circumference.

It is recognized that the method and apparatus for measuring the excavation surface in a three-dimensional shape with the video camera described in Patent Document 4 can be visually confirmed.
However, expensive projectors, video cameras, and computers are required, resulting in considerable costs. In addition, it is desirable to check and correct the shape and dimensions of the pile holes immediately at the site, but because the measurement method and equipment are based on complex arithmetic processing, the measurement and confirmation work is skilled. In addition to the need for technology, it is very cumbersome and it takes considerable time to extract the measurement results. Moreover, in order to calculate an accurate shape, it is necessary to create many light spots, and much labor is required for the measurement and calculation.

  In any of the above-mentioned Patent Documents 1 to 4, the drilling machine that has created the pile hole is once cleared and newly installed from scratch. Therefore, when it is necessary to excavate again after confirming the hole wall shape and dimensions, it is necessary to install a drilling machine again, and then install and confirm each device, and the workability is very poor.

  The purpose of the present invention is to use a drilling machine prepared for drilling a pile hole, for example, and to confirm in real time on the ground the situation where the ruler for checking the pile diameter contacts the hole wall. Yes, easy to use, very inexpensive, easy for anyone to implement, and the enlarged diameter of the expanded cast-in-place pile hole that allows you to physically and accurately check whether the expanded diameter has the required diameter and shape It is to provide a measuring device.

As a means for solving the above-described problems of the prior art, in the diameter expansion measuring apparatus for the diameter expanded cast-in-place pile according to the invention described in claim 1,
An expanded diameter measuring device for an expanded diameter cast-in-place pile hole,
The imaging means attached to the tip of the drilling machine's kelly bar and housed in the casing, and the operation from the position of the small diameter tilted upward at the same length as the bottom radius of the pile hole to the horizontal maximum diameter position Pile diameter confirmation ruler that is installed outside the casing as possible, is composed of a tilting means of the ruler, and an output display means for displaying an image captured by the imaging means,
The casing is attached to the tip of a kelly bar or the like, and the pile diameter confirmation ruler is moved downward in the enlarged diameter cast-in-place pile hole in the state of the small diameter position inclined upward, and when the casing reaches the enlarged diameter portion, The pile diameter confirmation ruler is gradually lowered to a horizontal position and brought into contact with the hole wall, and the kelly bar is rotated to cause the imaging means to image the situation where the pile diameter confirmation ruler is in contact with the hole wall over the entire circumference of the hole wall. It is projected on the output display means.

The invention according to claim 2 is an apparatus for measuring an enlarged dimension of a hole for an enlarged diameter cast-in-place pile according to claim 1,
The ruler for pile diameter confirmation is characterized in that its end and the corner of the casing are joined by a hinge.

The invention described in claim 3 is an apparatus for measuring an enlarged dimension of a hole for an enlarged diameter cast-in-place pile according to claim 1 or 2,
The pile diameter confirmation ruler is characterized in that a wire rod for operating the operation from the upward tilt position to the horizontal position is attached as the tilting means.

Invention of Claim 4 is the diameter expansion dimension measuring apparatus of the hole for diameter expansion cast-in-place piles described in any one of Claims 1-3,
An imaging illuminator for illuminating the side surface of the pile hole is installed above the casing provided in the kelly bar.

The diameter-expansion measuring apparatus for the diameter-expanded cast-in-place pile according to the inventions described in claims 1 to 4 has the following effects.
At the tip of the drilling machine's kelly bar, etc., a casing containing the imaging means and a pile diameter confirmation ruler are provided, and when the drilling machine reaches the enlarged diameter part, the pile diameter confirmation ruler is lowered to a horizontal position. Since it is configured to visually recognize the situation where the identification ruler touches the hole wall of the enlarged diameter portion by contacting the wall material and rotating the kelly bar with the output display means, it does not require any complicated calculation processing and is very inexpensive Therefore, since it has a simple configuration, anyone can easily and easily implement it. In addition, the shape of the enlarged diameter part can be seen in real time on the ground by the actual image projected on the imaging means, and the situation where the pile diameter confirmation ruler attached to the tip of the kelly bar can be seen visually. It is possible to physically and accurately confirm whether or not the expanded diameter portion has a required diameter. If the video is recorded, the client can check the video later and a highly reliable confirmation device can be provided.

  In addition, since the device of the present invention directly uses the kelly bar of the drilling machine prepared for drilling the pile hole, even if it is recognized that it is necessary to drill again at the time of visual recognition, the drilling work by the drilling machine is immediately performed. You can start and use the function of rotating the kelly bar of the drilling machine to image the entire circumference of the pile wall, making it very smooth to switch between confirmation and re-excavation work, contributing to the creation of a rational cast-in-place pile it can.

The present invention is an apparatus for measuring an enlarged diameter of a hole for an expanded diameter cast-in-place pile that has been dug.
The imaging means 5 attached to the tip of the drilling machine 2 such as the kelly bar 3 and housed in the casing 4 and the horizontal maximum from the position of the small diameter inclined upwards with the same length as the radius of the enlarged portion of the pile hole 1 From a pile diameter confirmation ruler 6 installed outside the casing 4 so as to be able to operate up to a radial position, a tilting means 10 of the ruler 6, and an output display means 7 for projecting an image picked up by the image pickup means 5. Configured,
The casing 4 is attached to the tip of the kelly bar 3 or the like, and the pile diameter confirmation ruler 6 is moved downward in the large diameter cast-in-place pile hole 1 in a small diameter position inclined upward, and the casing 4 is expanded in diameter. When the part X is reached, the pile diameter confirmation ruler 6 is gradually lowered to a horizontal position and brought into contact with the hole wall, and the kelly bar 3 is rotated so that the pile diameter confirmation ruler 6 is in contact with the hole wall. The image pickup means 5 is picked up and displayed on the output display means 7 over the entire screen.

Hereinafter, an embodiment of a diameter expansion measuring device for diameter expansion cast-in-place pile holes according to the present invention will be described based on the drawings.
The expanded diameter measuring device for expanded diameter cast-in-place pile holes of the present invention is implemented in expanded-diameter cast-in-place pile holes that have been excavated in the ground, and in particular bentonite liquid and mud water that prevent the collapse of the hole wall. It is preferably carried out in an area where a dry excavation work that does not require a liquid having a high specific gravity is possible.

In FIG. 1, the conceptual diagram of the diameter expansion dimension measuring apparatus for diameter expansion cast-in-place pile holes of this invention was shown.
The diameter expansion measuring device of the present invention includes a drilling machine 2 for excavating a pile hole 1, a casing 4 attached to the tip of a kelly bar 3 of the drilling machine 2, and a video camera housed in the casing 4. A pile installed outside the casing 4 so as to be able to operate from a small-diameter position tilted upward with a length substantially the same as the radius of the enlarged-diameter portion X of the pile hole 1 to a horizontal maximum-diameter position. A diameter confirmation ruler 6 and an output display means 7 for projecting an image picked up by the image pickup means 5 are configured.

  Since the drilling machine 2 uses the drilling machine 2 used for creating the pile hole 1 as it is, even if it is recognized that it is necessary to drill again at the time of visual recognition described later, the drilling work by the drilling machine 2 is immediately performed. Can start. In the illustrated example, the drilling machine 2 having the kelly bar 3 attached to the tip thereof is used. However, the present invention is not limited to this, and for example, an excavating arm such as an auger can be used.

The casing 4 has, for example, a box shape as shown in FIG. 2, and a photographing opening 4 a is provided on a side surface so that the photographing means 5 can photograph.
Further, an illuminator 8 that illuminates the side wall surface of the pile hole 1 is installed above the casing 4. This illuminator 8 is for illuminating the inside of the dark hole 1 and enabling the imaging means 5 to take an image. Therefore, when using a camera equipped with infrared rays or a good sensitivity function, there is no need to provide it.

In the illustrated example, the pile diameter confirmation ruler 6 has a length that is the radius of the enlarged diameter portion X of the pile hole 1. As a simple configuration, it is preferable to be able to cope with piles of various diameters.
Further, the upper end portion of the identification ruler 6 and the lower corner portion of the casing 4 are joined by a hinge 9 (hinge) so as to be tilted upward or fixed in a horizontal position. Further, tilting means 10 is provided as means for guiding the operation from the small diameter position inclined upward to the horizontal maximum diameter position. For example, a wire 10a such as a wire or a rope is attached to the tip of the ruler 6 for checking the pile diameter, and when the operator pulls the wire 10a, the identification ruler 6 is tilted upward with the lower corner of the casing 4 as a fulcrum and lowered. Can be placed horizontally. Although not shown in the drawings, the pile diameter confirmation ruler 6 and the casing 4 are connected by a wire that can be expanded and contracted by a motor or the like, and the motor is operated by a switch or the like from the ground. A tilting means 10 for controlling the operation of the pile diameter confirmation ruler 6 is also conceivable.

  The output display means 7 is a monitor or the like installed on the ground, and the output display means 7 and the imaging means 5 are connected by a cable 11 so that an image taken by the imaging means 5 can be confirmed in real time.

  In order to confirm the shape and size of the enlarged-diameter portion 10 using the confirmation device of the present embodiment, first, a casing in which each device described above is attached to the tip of the kelly bar 3 of the drilling machine 2 after excavation. 4 is installed to complete the pile bottom shape confirmation device. Then, as shown in FIG. 1, the pile diameter checking ruler 6 is moved downward in the enlarged diameter cast-in-place hole 1 in a small diameter position state inclined upward. When the casing 4 reaches the enlarged diameter portion X of the pile hole 1, the wire 10 is lowered and the pile diameter confirmation ruler 6 is gradually lowered to a horizontal position to contact the hole wall of the enlarged diameter portion X.

Next, using the function of rotating the kelly bar 3 of the drilling machine 2, the kelly bar 3 is rotated, and the state where the pile diameter confirmation ruler 6 is in contact with the hole wall is shown in the imaging means 5 over the entire hole wall. The image is picked up, transmitted to the output display means 7 and displayed, so that it can be viewed in real time.
Incidentally, when the maximum diameter of the enlarged diameter portion X is deep, the casing 4 is gradually lowered and the above-described imaging operation is repeated.

  Therefore, the pile bottom shape confirmation device of the present invention can confirm the shape of the enlarged diameter portion X in real time on the ground by the actual image projected on the imaging means 5 and also confirm the pile diameter attached to the tip of the kelly bar 3. Since the condition of the ruler 6 in contact with the hole wall is visually recognized, it can be confirmed accurately and surely whether or not the enlarged diameter portion X has a necessary dimension. If the video is recorded, the client can check the video later and a highly reliable confirmation device can be provided.

  Although the embodiments have been described with reference to the drawings, the present invention is not limited to the illustrated examples, and includes a range of design modifications and application variations that a person skilled in the art normally performs without departing from the technical idea thereof. I will add that just in case. For example, although imaging and confirmation only in the enlarged diameter portion X have been described, the same method can be applied to a small diameter portion at an upper position.

It is the elevation which showed the conceptual diagram of the pile bottom shape confirmation apparatus of the hole for diameter expansion cast-in-place piles concerning this invention. It is the enlarged view which showed an example which attached the ruler for pile diameter confirmation etc. to the casing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pile hole 2 Drilling machine 3 Kelly bar 4 Casing 5 Imaging means 6 Pile diameter confirmation ruler 7 Output display means 8 Illuminator 9 Hinge 10 Wire rod X Expanded part

Claims (4)

An expanded diameter measuring device for an expanded diameter cast-in-place pile hole,
The imaging means attached to the tip of the drilling machine's kelly bar, etc. and stored in the casing, and the operation from the position of the small diameter tilted upward to the horizontal maximum diameter position with the same length as the enlarged diameter radius of the pile hole A ruler for checking the diameter of the pile installed outside of the casing, a tilting means for the ruler, and an output display means for projecting an image captured by the imaging means,
The casing is attached to the tip of a kelly bar or the like, and the pile diameter confirmation ruler is moved downward in the enlarged diameter cast-in-place pile hole in the state of the small diameter position inclined upward, and when the casing reaches the enlarged diameter portion, The pile diameter confirmation ruler is gradually lowered to a horizontal position and brought into contact with the hole wall, and the kelly bar is rotated to cause the imaging means to image the situation where the pile diameter confirmation ruler is in contact with the hole wall over the entire circumference of the hole wall. An enlarged diameter measuring device for an enlarged diameter cast-in-place pile, which is projected on an output display means.   2. The diameter-expansion dimension measuring device for a diameter-expanded cast-in-place pile according to claim 1, wherein an end of the pile diameter confirmation ruler and a corner of the casing are joined by a hinge.   The pile diameter confirmation ruler according to claim 1 or 2, wherein a wire rod for operating an operation from an upward tilt position to a horizontal position is attached as a tilting means for the pile diameter confirmation ruler. Expanding dimension measuring device for industrial holes.   The upper part of the casing provided in the kelly bar is provided with an imaging illuminator that illuminates the side surface of the pile hole, and is used for an enlarged cast-in-place pile according to any one of claims 1 to 3. Hole diameter measuring device.

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