JPS6234913B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an underwater boring device, and the present invention relates to an underwater boring device that is lightweight and integrated, making installation, removal, transportation, and other handling convenient. The drilling machine is always smoothly driven by the power source on the float barge using a particularly simplified drive mechanism that is not affected by the size, so that drilling work can be performed easily.

Conventionally known drilling equipment generally has a mechanism for propelling the drilling rod, a guide mechanism for the rod, a power device and a power transmission mechanism, a tower for safely supporting the drilling equipment, and other mechanisms that are closely related to each other. Usually, they were combined inseparably.

Traditionally, when performing underwater boring in the sea or river, a large-scale artificial island or work deck was built on the water to serve as a work base, or a huge caisson was sunk at the bottom of the water to be used as a work chamber. There are two methods: one is a boring method carried out using a steel tower, and the other is an inclined boring method that is carried out from land.However, these methods require a great deal of time and expense for installation work, and not only are there limits to where work can be done, but also the weight of steel towers. Because of this, it had to be moved using a crane barge, which had the disadvantage of high charter costs. Additionally, it was difficult to install these towers in locations with fast currents and the shape of the seabed (unevenness, slopes), so they were not very practical.

In view of the above-mentioned drawbacks of the conventional devices, the present invention provides a device that does not require the installation of artificial islands, decks, or boxes as in the conventional devices, and can easily carry out boring work through transportation, assembly, and drive without using a tower. It is a daily practice to do so.

That is, the present invention completely separates the boring body from the driving source and installs it on a workbench attached to a single support pipe, and furthermore, the workbench is made open so that a core tube and a thin wall tube at the tip of the drilling rod can be installed. , facilitates installation and removal of penetration testing machines, etc.
Moreover, the driving source was installed on the float barge, and a hydraulic mechanism ensured smooth operation of the drilling machine at all times.

Note that there is a tilting type drilling device disclosed in Japanese Patent Publication No. 52-20922, which is an invention in which the applicant of the present application was previously involved, as a means for operating a drilling machine using a drive source on a float barge, but this device rotates the drilling rod. , a gear mechanism is used to raise and lower the gear mechanism, and this gear mechanism is driven via a universal joint shaft connected to a drive source (prime mover). Although it is possible to drive the drilling device smoothly without being affected by changes in the position with respect to the gear mechanism, the structure of the gear mechanism and the drive mechanism to accommodate it are unavoidably complicated, and the operation is troublesome. When the position of the gear mechanism and the barge changes significantly, it is necessary to separately provide an angle adjustment device to adjust the change.

The present invention improves this drive mechanism and further improves the effect of separating the boring body and the drive source using a single support pipe.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the configuration of the present invention shown in the drawings will be described below.

In FIG. 1, reference numeral 2 denotes a boring body, and 3 denotes a float barge equipped with a drive source for driving the boring body 2, a crane used for suspending the drilling machine, and the like. As shown in the figure, the boring body 2 is attached to a workbench 5 attached to the upper end of a support pipe 4 erected on the seabed ground, forming a single boring tester 1. A test rod 6 for excavating and collecting samples is passed through a casing pipe 7 that acts as a retaining member within the support pipe 4.

As shown in FIG. 2, the boring body 2 is constructed by passing a drilling rod 6 through the center of the holding plate 8, then inserting it into the casing pipe 7 of the support pipe 4, and detachably attaching a core tube or thin wall to the lower end of the rod. It is designed to screw tubes, penetration testers, etc.

The above-mentioned drilling rod 6 is connected to a hydraulic motor 9 on a holding plate 8.
It is loosely inserted into the holding plate 8 through a chuck member 10 which is directly connected to and rotated, and is rotated through the grip of the chuck member 10. In addition, the holding plate 8 includes two hydraulic cylinders 1 attached to a workbench 5 fixed to the upper end flange portion 11 of the support pipe 4, as shown in FIG.
Attach to the upper ends of piston rods 13 and 13 of 2 and 12. The two hydraulic cylinders 12, 12 are provided close to the sides of the workbench 5 to make the interval between them as wide as possible to make the workbench 5 open. The hydraulic cylinder 12 causes the drilling rod 6 to move up and down together with the holding plate 8 by gripping it with the chuck member 10 and moving the piston rod 13 forward and backward.

As described above, the test rod 6 can be raised and lowered with or without rotation at appropriate times by the cooperative operation of the hydraulic motor 9, the hydraulic cylinders 12, 12, and the chuck member 10.

Further, the workbench 5 is provided with a hoisting drum 14 as shown in FIG. This drum 14 suspends the drilling rod 6 via a wire and is used for attaching it to the boring body 2, lifting it up, and adding other rods, and also pulls up and pulls down a mallet suspended from the wire to suspend the drilling rod. Used for driving into the submarine ground. Furthermore, a plurality of support pipes 4 to which the work table 5 is attached are connected by flanges depending on the water depth at the work site so as to have a predetermined length.

As shown in FIG. 1, a hydraulic unit 15 is provided on the float barge 3, and this hydraulic unit 15 is connected to a hydraulic motor 9 and hydraulic cylinders 12, 12 via an operating section 16 with hydraulic hoses 17, 18. . The hydraulic hoses 17 and 18 are flexible and double-sided hoses made by covering a rubber tube with a vinyl tube or the like to provide strength. As a result, the hydraulic motor 9 and the hydraulic cylinders 12, 12 for driving the boring body are both connected to the hydraulic unit 1 on the barge 3.
5 under remote control via the operating section 16. In addition, this hydraulic unit 15
The winch 19 provided on the barge 3 is operated to operate the tower-shaped large crane 20. Furthermore, on the barge 3, there is a pump 23 that circulates and supplies filtered mud water, which is used to remove slime generated in the core tube section etc. during boring, through a delivery hose 21, a test drilling rod 6, and a mud water hose 22.
A muddy water tank 2 collects overflowing muddy water from a support pipe 4 via a hose 22 and filters it.
4 is provided. Reference numeral 29 denotes a muddy water stop packing that acts as a check valve and is provided in the support pipe 4 below the upper end of the casing pipe 7.

When performing underwater boring with the above configuration, first, a plurality of support pipes 4 are connected to have a length corresponding to the water depth at the drilling work point, a work table 5 is attached to the upper end of this support pipe 4, and then a work table 5 is attached to the upper end of the support pipe 4.
A retaining wall 8 to which a hydraulic motor 9 and a chuck member 10 are attached, a hydraulic cylinder 12, 12, etc. are attached to the boring body 2, which is assembled into one body.
The body is used as a boring test weight 1, and this is mounted on a float barge 3 together with a test rod 6. This barge 3 is towed to the sea at the destination point, and the assembled boring test machine 1 is lifted using the hoisting winch 19 and crane 20 on the ship, and its support pipe 4
plunge into the water at the work site and erect it on the seabed ground as shown in Figure 1. Next, the casing pipe 7 is inserted into the support pipe 4 erected on the seabed ground A and coaxially installed inside the support pipe 4. Note that this casing pipe 7 may be installed inside the support pipe 4 when the boring machine 1 is assembled. When erecting this support pipe 4, as shown in the figure, a plurality of anchor wires 25 fixed to the support pipe 4 are pulled,
The traction of the wire 27 directly connected to the stabilizing plate 26 installed at the bottom of the support pipe 4 in advance is determined based on water depth, ground shape,
Depending on wave conditions, they can be used alone or in combination to stabilize their vertical installation. Next, the chuck member 10 of the holding plate 8 is released, and the drilling rod 6 on the barge 3 is released.
hoisting drum 1 on crane 20 or workbench 5
4 to suspend it and pass through the chuck member 10 and holding plate 8, screw the core tube to the lower end of the drilling rod 6 on the workbench 5, and insert the core tube into the casing pipe 7 in the support pipe with the tip of the core tube. The core tube is inserted, and while adding rods to match the length of the support pipe 4, it penetrates until the core tube collides with the ground. Then, a pull-down hammer is attached to the wire 14' of the hoisting drum 14, and the test drilling rod 6 is
Hit the upper end of the rod and drive it into the ground layer. Also, before and after driving the drilling rod, the operating section 1
Hydraulic hoses 17 and 18 connected to hydraulic unit 15 via pipes 6 are connected to hydraulic motor 9 and hydraulic cylinders 12 and 12, respectively, and mud pipe 22 is connected between support pipe 4 and mud tank 24 of barge 3. do.

After making the preparations as described above, the chuck member 10 is closed to grip and hold the drilling rod 6, and the hydraulic motor 9 and hydraulic cylinders 12, 12 are driven. Then, the drilling rod 6 is rotated and lowered by the rotational drive of the hydraulic motor 9 and the lowering drive of the hydraulic cylinders 12, 12, and drilling is performed using the core tube at the tip. When drilling to the desired depth is completed, the hoisting drum 14 or the piston rod 13 moves up and down, and the tongs 28 on the drilling rod are moved.
28' etc., pull up the test drilling rod 6, remove the core tube on the workbench 5, and attach the soil material sampling member such as the thin wall tube and the penetration tester.
The test rod is pulled down to collect the soil material from the drilled area, and the test rod is pulled up again to store the collected soil material on the workbench. Soil materials are sampled at predetermined points by repeating the above-mentioned driving of the test rod, core tube, boring using a penetration testing machine, etc.

The installation, removal, and replacement of core tubes, penetration testing machines, thin wall tubes, etc., as well as the storage of collected soil materials, are performed on the workbench 5, but the workbench 5 is open and the distance between the holding plate 8 and the workbench 5 is small. Because it is wide, operations such as replacing the tube can be carried out very easily and in a short time, and by opening it, even relatively long tubes can be easily handled, thereby increasing sampling efficiency. As described above, the boring work at one point is completed, but when moving the work point, the chuck member 10 is released and the hoisting winch 14 or piston rod 13 is moved up and down and the tongs 28, 28', etc. on the drilling rod 6 are moved. Then, the test rod 6 is pulled up and removed from the support pipe 4, and the joints are sequentially removed and stored on the workbench 5 or float barge 3. Then anchor wire 25
Alternatively, the wire 27 is pulled out from the seabed ground A, the hydraulic hoses 17, 18, and the mud water hose 22 are disconnected, and the boring machine 1 with the boring body 2, support pipe 4, and workbench 5 assembled remains as a single unit.
This is hoisted by the crane 20, recovered onto the barge 3, and towed to the next work site where boring is performed as described above.

As explained above, the present invention uses one support pipe as a turret, which is erected at the target point with its upper end exposed above the sea surface, and the propulsion mechanism for the drilling rod is mounted on the support pipe. In offshore boring equipment that is driven by a power unit installed on a work boat, one support pipe is connected to multiple pieces of unit length depending on the water depth, and a single support pipe is connected to the top support pipe. A workbench is fixedly installed, and a holding plate is installed on the workbench so that it can be moved up and down by a hydraulic cylinder, and the drilling rod is gripped and held on the holding plate in a penetrating state.
A releasable chuck member is provided, and the chuck member is rotatably driven by a hydraulic motor provided on the holding plate, and a hydraulic unit serving as a drive source for the hydraulic cylinder and the hydraulic motor is provided separately from the workbench. The system is installed on a work boat, connected between them with a hydraulic hose, the support pipes are disconnected, loaded onto the work boat and transported to the target point at sea, where the required number of support pipes are connected and erected. Because of this, the support pipes can be separated and compacted, loaded onto a work boat, and moved to the target location faster and faster than when a large floating platform is towed by a tugboat or the like. It has a small turning radius, can reach the target point in a short amount of time, and can quickly set up the turret. In particular, the turret side is equipped with only the hydraulic cylinder and hydraulic motor of the drilling rod's propulsion mechanism, and the hydraulic unit that serves as the drive source for these is completely separated from the turret side and mounted on the work boat, so all of these are installed on the work boat. Since the weight can be significantly reduced compared to the one mounted on the turret, the turret can be made lightweight with a single relatively thin support pipe, making it easier to transport and handle, and can be implemented at low cost. Also, since a workbench was installed on the support pipe,
Adding drilling rods, attaching and detaching core tubes, thin wall tubes, penetration testing machines, etc. can be easily done on the workbench. Furthermore, since the hydraulic cylinders and hydraulic motors on the workbench are connected to the hydraulic unit on the workboat using hydraulic hoses, the hydraulic mortar is able to withstand vibrations of the ship due to waves, wind, etc., and fluctuations due to the ebb and flow of the tidal level. It is only necessary to make the length of the wave length longer, and there is an advantage that these adjustment devices are unnecessary, there is no restriction, and there is no fear of wave loss.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a side view showing the procedure for constructing the device, and FIG. 2 is a front view of the part to which the drilling machine is attached. 1... Boring drilling machine, 2... Boring body,
3...Float barge, 4...Support pipe, 5...Work table, 6...Testing rod, 9...Hydraulic motor, 12...Hydraulic cylinder, 15...Hydraulic unit, 17, 18
...Hydraulic hose, i...Undersea ground.

Claims (1)

[Claims] 1. A power plant in which a support pipe is set up as a tank at a target point with its upper end exposed above the sea surface, a drilling rod propulsion mechanism is mounted on the support pipe, and the propulsion mechanism is installed on a work boat. In an offshore boring device that is driven from the water, one support pipe is connected to multiple unit lengths depending on the water depth, and a workbench is fixed on the top support pipe. A holding plate is provided on the workbench so that it can be driven up and down by a hydraulic cylinder, and a chuck member that can grip and release the drilling rod in a penetrating state is provided on the holding plate, and the chuck member is provided on the holding plate. A hydraulic unit that serves as a drive source for the hydraulic cylinder and the hydraulic motor is installed on a work boat separate from the work platform, and a hydraulic hose is connected between them, and the support pipe is connected. An underwater boring device characterized in that it is unraveled, loaded onto a work boat, transported to a target point on the sea, and installed at the target point by connecting a required number of support pipes.