JPS58113487A - Guide pipe support apparatus for water boring - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a supporting device for a guide pipe that guides the insertion of a casing pipe and a drilling rod for drilling into underwater ground from above the water, and more specifically, the present invention relates to a supporting device for a guide pipe that guides the insertion of a casing pipe and a drilling rod for drilling into underwater ground from above the water. This invention relates to a guide pipe support device that performs on-water poling.

When drilling the underwater ground from above the water, install a guide pipe vertically at the drilling point, insert the casing pipe and drilling rod into the guide pipe, and rotate and propel the drilling rod. When carrying out this floating polling, it was carried out by constructing towers or artificial islands on the water depending on the scale of the polling, and using these as work bases. However, Yagura.

Building artificial islands is a huge economic burden and the work is difficult.

Therefore, it is practiced to directly penetrate a guide pipe from above the water into the underwater ground, make the guide pipe a solid structure by the supporting force of the ground, and then insert a casing pipe and a drilling rod into the guide pipe to perform above-water poling. However, when the bottom of the water is soft, the guide pipe often penetrates to a depth beyond its allowable limit due to its own weight and other forces. Also, a large force is required to pull up the purchased guide pipe and its fixing device from the ground.

The object of the present invention is to be suitable for floating poling in soft underwater ground, without the guide pipe or its substitute penetrating beyond the desired depth, and without excessive force required for F5r during retrieval. To provide a sloped pipe support device.

The floating polling river guide pipe support device according to the present invention connects the lowest single pipe of the guide pipe through which the casing pipe and the drilling rod for floating polling are inserted and guided,
A support pipe that enters perpendicularly into soft water bottom ground to the middle part thereof, an embedded pipe that is connected to the tip of the support pipe and has a length such that the tip reaches a desired depth below the water bottom surface, and the support It is joined to the support tube surrounding the intermediate local wall of the tube, and consists of a central portion near the joint with the support tube and a peripheral portion divided into three or more parts, each peripheral portion being hinged to the central portion, The device is characterized in that it comprises a support plate that prevents each divided peripheral portion from rotating above the central portion surface.

In a preferred embodiment of the floating Pauling river guide pipe support device according to the present invention, the means for preventing simultaneous movement of each divided peripheral edge portion above the central portion surface is provided above the central portion.
1! These are multiple beams that are extended and welded to the same position of the two parts.

In a further preferred embodiment of the floating Pauling river guide pipe support device according to the present invention, the support pipe and the support plate are rigidly connected by welding, and the connection between the support pipe and the support plate is In another preferred embodiment, the support tube and the support plate each have a ball joint and a spherical seat, and the ball joint and the spherical seat allow the support plate to tilt relative to the support tube. It is joined.

Hereinafter, the apparatus according to the present invention will be explained based on FIG. 1 of the drawings of the embodiment.

This support device consists of a support tube 1, an embedded tube 2, and a support plate 3. The support pipe 1 is vertically inserted into the soft underwater ground up to its intermediate portion (support plate mounting position). Seven lunges of the single tube 4 at the lowest stage of the guide pipe are connected to the upper seven lunges of the support tube 1. The guide pipe is formed by sequentially connecting the single pipes to the lowest single pipe 4 and making the uppermost single pipe protrude above the water surface. The embedded pipe 2 is a part of the flange 1nGC of the support pipe 1.
The length is such that the tip reaches the desired depth below the bottom surface of the water.

The support plate 3 surrounds the peripheral wall of the intermediate portion of the support tube 1 and is joined to the support tube 1 . In the actual elliptical example shown in FIG. 1, the support plate 3 is vertically and rigidly connected to the support tube 1 by # contact, and is reinforced with ribs 5. The size of the support plate 3 is appropriately determined depending on the bearing capacity of the hydroxyl ground, the weight of the guide pipe, and the magnitude of other loads applied to the support plate 3. The Thf of the support plate 3 may be increased by dividing the support tube 1 into upper and lower parts, rigidly connecting the support plate 3 as an upper end 7 flange of the lower support tube, and joining the upper support tube thereon.

The diameters of the main, upper and lower support tubes may be different.

The support plate 3 has central portions 3A and 3 near the joint with the support tube 1.
The peripheral edge portion 3B is divided into at least 4 pieces (4 pieces in the embodiment). Each peripheral portion 3B is hinged to the central portion 3A by a pin 6. Furthermore, two beams 1 in each of the x and y directions extending to the rotating position of the divided peripheral edge portion 3B are welded to the upper side of the support plate center portion 3A so as to be perpendicular to each other.

The support plate 3 is divided into a central portion 3A and a peripheral portion 3B.
Since B can be hung down by the hinge, if the bearing capacity of the bottom surface of the water is smaller than expected and the support plate 3 has penetrated into the ground, the guide pipe support means can be easily pulled up. If necessary, by suspending the beam 1 with a hanging wire or chain 8, the beam 1 can be reinforced when the guide pipe support means is pulled up.The peripheral edge 3B of the support plate 3 is drooping. This support means is grounded to the underwater ground, and as the embedded pipe 2 and support pipe 1 penetrate into the ground, the peripheral edge 3B is rotated, and the beam 1 rotates the surface of the central part 3A. Since it is designed to prevent the support plate from rotating further upward, the effect is the same as that of a single support plate that is not joined by a split hinge.

FIG. 2 shows another embodiment of the device of this invention.

In this embodiment, the support tube 1 has a ball-and-socket joint 9, and the support plate 3 has a spherical seat 10, and the ball-and-socket joint 9 and the spherical seat 10 connect the support plate 3 to the support tube 1 with a tilting function of 0]. has been done. The attachment portion of the spherical seat 10 to the support plate 3 is reinforced with ribs 11.

The apparatus of the embodiment shown in FIG. 2 can make the support plate 3 follow the slope of the underwater ground even if the underwater ground is sloping, so the load of the guide pipe etc. can be smoothly transmitted to the ground and the equipment can be stabilized. Even if there is a hard rock in the ground and the support plate 3 is pressed against it, the angle of the support plate 3 can be changed freely, so the tilting force can be applied to the guide pipe. There is no.

Since the guide-pipe support device for underwater polling of the present invention is constructed and operates as described above, when installed on a soft underwater ground, the guide pipe will not penetrate beyond the desired depth, which will hinder sampling. No such problems occur.

Furthermore, even if the support plate goes underground, the lifting power will not be excessive because it hangs down at the hinge portion when being lifted up. In addition, when using a ball-and-socket joint and a spherical seat, it is possible to follow the slope of the underwater ground surface, and even if a hard part of the ground is partially bent,
Since the support plate can be tilted to accommodate this, the load of the guide pipe etc. can be smoothly transmitted to the ground and the guide pipe can be supported by the mold bar.

[Brief explanation of the drawing]

Figures 1(,), (b) and 2 show different embodiments of the device of the present invention. Figures 1(,) and 2 are longitudinal sectional views, and Figure 1(b) is a sectional view taken along the line A-A in FIG. 1 (,). 1... Support tube 2... Embedded tube 3-... Support plate 3A... Center &ls 3B... Periphery 4...
guide. Single pipe 6... Bin 7... Hem 9.
...Spherical joint 10...Spherical seat Inventor Kaneo Tobe Inventor Susumu Sato Applicant Chuo Kaihatsu Co., Ltd.-4 (G) Figure 1 (b)

Claims (1)

[Scope of Claims] (ri) A support that connects the lowermost single pipe of a kite pipe through which a casing pipe for surface poling and a test rod are inserted and guides, and that is allowed to enter perpendicularly into soft underwater ground up to r1]s. a pipe, an embedded pipe with a length that is connected to the tip of the support tube and whose tip reaches the water bottom surface (WT), and a buried tube that is connected to the support tube by surrounding the middle local wall of the support tube. It consists of a central part near the joint with the support tube and a peripheral part divided into three or more parts, each peripheral part is hinged to the central part, and each divided peripheral part is connected to the upper hook from the central part surface. A power support device for water poling, characterized by a support plate that prevents rotation, and a support plate that prevents rotation. (2) The means for preventing rotation of each divided peripheral edge part above the central part surface is a plurality of beams welded to the upper side of the central part extending to the divided peripheral part rotation position. Devices in scope 1. (3) The support tube and the support plate are rigidly connected by an f6 contact, or furthermore, a lip is provided between the support tube and the support plate. Section equipment. (4) The support tube and the support plate each have a ball-and-socket joint and a spherical seat, and the wrinkle support plate is tiltably joined to the support tube by the ball-and-socket joint and the spherical seat.
Apparatus according to paragraph 2 or paragraph 2.