JPH03186680A - Fixing method for water bottom pipe - Google Patents

Abstract

PURPOSE:To fix a clamp by a remote control with no necessity for digging out a pipe by suspending a rotary device and a vertically installing device by means of a lift device on a work ship, and setting up the clamp, mounted to the vertically installing device, to the pipe next rotating an anchor shaft to fix the pipe. CONSTITUTION:A rotary device 13 and a vertically installing device 2, having an arch surface 21 in the bottom surface, are hung down by a leader 12 mounted to the upper part of a frame bed 11 on a work ship 1. A clamp 3 and an anchor shaft 4, connected to the rotary device 13 in the side surface, are removably mounted to a top part of the arch surface 21 of the vertical device 2. By positioning a pipe 5 buried in the bottom of water, the clamp 3 is set up just above the pipe 5. The anchor shaft 4 is rotated and driven, and its upper part is fixed to the clamp 3 with the pipe 5 fixed. As a result, the clamp can be fixed to the pipe by a remote control.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for fixing a pipe buried at the bottom of water by remote control.

<Problems with conventional technology> When attaching and fixing a clamp to a pipe buried at the bottom of the water, conventionally, after the pipe was dug out, anchors were driven into the clamp while being guided by a dipper.

Therefore, there is a disadvantage that it takes time and effort to dig out the pipe and that dirt is generated during the digging.

Also, it is dangerous because the diameter is guided.

Therefore, in places like Tokyo Bay, where environmental issues are severe and visibility is poor due to sludge, this method was nearly impossible.

<Objective of the present invention> The present invention was made in order to solve the above-mentioned problems, and provides a method for fixing underwater pipes that does not require digging out the pipe and can fix the clamp by remote control. The purpose is to provide.

<Means for Solving the Problems> That is, the present invention provides a method for fixing pipes buried in the bottom of water, in which a lifting device and a rotating device are installed on the top of a pedestal assembled on a work boat, and the lifting device is used to raise and lower the bottom surface of the pipe. A lifting device formed in an arch shape is suspended, a clamp is removably attached to the top of the arched bottom of the lifting device, and an anchor shaft connected to the rotating device is detachably attached to the side surface. , locate the approximate location of the pipe buried at the bottom of the water, lower the standing device above the pipe, install the clamp directly above the pipe, and then activate the rotating device to rotate the anchor shaft. This method of fixing an underwater pipe is characterized by fixing the pipe by driving the anchor shaft to a predetermined depth and fixing the upper part of the anchor shaft to a clamp.

<Description of the present invention> The present invention will be explained in detail below.

<A> Assembling the device (Fig. 1) The leader 1 is attached to the top of the pedestal 11 assembled on the work boat 1.
2, and by this leader 12, the rotating device 1
3 and a standing device 2 having an arched surface 21 on the bottom surface is suspended.

A clamp 3 is removably attached to the top of the arched surface 21 of the erection device 2, and an anchor shaft 4 connected to the rotating device 13 is detachably attached to the side surface.

Note that between the rotating device 13 and the anchor shaft 4,
A torque rod 41 is interposed between the torque rod 41 and the anchor shaft 4, and a chuck 42 is disposed between the torque rod 41 and the anchor shaft 4 to removably connect them.

Furthermore, an anchor plate 43 is attached to the lower part of the anchor shaft 4.

<Exit> Determining the position of the pipe Fig. 1> The approximate buried position of the pipe 5 is determined by surveying, the diameter probe identifies the position of the pipe 5 by magnetic survey, protrusion rod, etc., and a buoy or transponder 6 etc. is installed. .

On the other hand, an interrogation device 61 is attached to the bottom of the work boat 1, and by transmitting a signal to the transponder 6 and receiving the signal, the work boat 1 is moved while grasping the position of the pipe 5, Align the center of the standing device 2 with the center of the pipe 5.

<C> Setting of clamps, etc. (1st (m) Set the clamp 3 and anchor shaft 4 in the erection device 2, and attach the upper end of the anchor shaft 4 to the chuck 42 in a hinged manner.

<2> Setting down the standing up device 2 (Fig. 2) The upsetting device 2 is set down while blowing out a jet from the bottom of the standing up device 2.

In this case, the sensor attached to the stand-up device 2 will
The erection device 2 is lowered directly above the pipe 5, and the clamp 3 is installed directly above the pipe 5.

<E> Driving the anchor <Figures 3 to 5> Push the anchor shaft 4 until the anchor plate 43 passes the lower end of the pipe 5.

Next, using an upright ruler 44 or the like, the anchor shaft 4 is made to stand upright, and as shown in FIG. 4, the anchor shaft 4 is fitted into the slit 31 of the clamp 3 and prevented from coming out by the stopper 32.

Next, the chuck 42 is fixed, and the anchor shaft 4 and the torque rod 41 are fixed in a straight line.

Then, the rotation device 13 is operated, and the anchor shaft 4
The anchor shaft 4 is driven into the support layer 7 while interlocking and controlling the amount of rotation and the amount of pushing.

<Go> Fixing the pipe (Fig. 6) After driving the fixing tool 45 at the upper end of the anchor shaft 4 into contact with the upper surface of the clamp 3, remove the clamp 3 from the vertical mounting device R2, and then attach the chuck 42 to the anchor. Remove the shaft 4 from the upper end.

This allows the pipe 5 to be fixed.

After fixing the pipe 5, the lifting device 2 is pulled up, the transponder 6 and the like are collected, the work boat 1 is moved to the next fixing point, and the above operations are repeated.

<Effects of the Present Invention> Since the present invention has been described above, the following effects can be expected.

<B> When attaching and fixing a clamp to a pipe buried at the bottom of the water, conventionally, after digging out the pipe, anchors were driven into the clamp while being guided by a piper.

Therefore, there is a disadvantage that it takes time and effort to dig out the pipe and that dirt is generated during the digging.

In contrast, in the present invention, the clamp can be fixed to the pipe by remote control by lowering the erecting device and rotating the anchor shaft.

Therefore, there is no need to dig out the pipe, improving construction efficiency and preventing contamination.

<Exposure> Since there is no need to guide the standing device etc. using a dipper as in the past, it is safer and improves work efficiency.

<C> According to the present invention, reliable construction is possible even in places such as Tokyo Bay, where environmental problems are severe and visibility is poor due to sludge.

[Brief explanation of drawings]

Figure 1 2 Detailed explanation of the present invention Figure 2: Illustration of the work of sinking the erection device Figure 3: Illustration of the work of erecting the anchor shaft Figure 4: Explanation of the method of fixing the anchor shaft to the clamp Figure 5: Explanation of anchor shaft driving Figure 6:
Explanation of the completed state of fixing the clamp National policy Figure 1 (Kotoh - 5 vias. Figure 2 1 Ah!r @ Figure 5 ◇

Claims (1)

[Claims] (1) In a method of fixing pipes buried at the bottom of the water, a lifting device is installed on the top of a pedestal assembled on a work boat, and this lifting device suspends a rotating device and a standing device with an arched bottom surface. A clamp is removably attached to the top of the arched bottom of this erection device, and an anchor shaft connected to the rotating device is detachably attached to the side, and the approximate location of the pipe buried in the bottom of the water is determined. , lower the standing device to the top of the pipe, and install the clamp directly above the pipe. Next, operate the rotating device to rotate the anchor shaft and drive it to a predetermined depth. A method for fixing underwater pipes, characterized by fixing the pipe by fixing the upper part to a clamp.