JPH0768694B2 - How to operate a horizontal drain material buried ship - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention operates a horizontal drain material burial vessel for horizontally laying drain material in a reclaimed land by dredging or in soft ground such as sludge processing land. Regarding the method.

(Prior Art) Generally, when a soft dredged soil deposited on the bottom of a sea such as a seabed is dredged by a pump dredger and put into an burial ground, an ultra-soft ground is formed. Conventionally, such ultra-soft ground has natural consolidation, and the next dredged soil is thrown in, or after a certain amount of proof stress due to natural consolidation is developed, the drain material is driven up and down.
A forced consolidation method was used in which a weight such as sand was placed on it.

In such a method, it takes a long time for natural consolidation, and it takes a long time before the conventional ground improvement method can be applied.

Considering this point, a horizontal drain material is buried in the soft ground, and the ground improvement for sucking out the water in the soft ground through the drain material is studied. As shown in FIG.
The horizontal drain material embedding vessel 4 having the reel 2 on which the reel is wound is mounted on the ship and the drain material embedding guide 3 for feeding out the drain material under the bottom of the ship is projected on the soft ground 5 to float on the soft ground 5. Inside, the tip of the drain material 1 fed out by the drain material burying guide 3 is fixed to the anti-fixing member 6 and, in this state, the horizontal drain material burying vessel 4 is moved and the drain material is laid out horizontally from the drain material burying guide. A method of burying has been developed (JP-A-64-
10813).

As shown in Fig. 8, the maneuvering of this drain material burial vessel is performed by pulling the front and rear tow ropes 9A and 9B with a pair of winches 8A and 8B provided on the opposite shores 7A and 7B to linearly move the hull. Also, the pulling ropes 9A and 9B are moved by moving the positions of the pulleys 10A and 10B in each returning process, whereby the horizontal drain member is buried at regular intervals.

(Problems to be solved by the invention) In the burying of the horizontal drain material as described above, the burying length in one step is long, and the interval between the drain materials laid adjacent to each other (buried pitch) is about 1 m. Since they are close to each other, highly precise maneuvering is required.

However, in the conventional method, especially the wind direction changes, it is difficult to obtain the straightness of the vessel maneuvering due to the change of the wind speed and the change of the water flow accompanying it, and it is not possible to maintain a constant buried pitch in the entire soft ground, and therefore for the ground improvement. There was a problem that non-uniformity would occur.

SUMMARY OF THE INVENTION The present invention has been made in view of the conventional problems as described above, and an object thereof is to provide a method for manipulating a horizontal drain material-embedded ship, which is simple in equipment and capable of obtaining a high degree of straight traveling accuracy.

(Means for Solving the Problem) The feature of the present invention for solving the above-mentioned conventional problems and achieving the intended purpose is that the hull of a horizontal drain material-buried ship floating on soft ground. In a method of maneuvering a horizontal drain material-embedded ship that is propelled by towing means installed on the opposite shore, the positions of the tow rope connectors on the bow and stern of the hull can be adjusted in the width direction of the ship. A tow rope adjusting device is provided, and a tow rope is stretched in front of and behind the hull via both tow rope connecting tools to move the hull while maintaining a constant tension on both tow ropes, and a drain material. A laser beam is emitted from the land in parallel with the embedded design line, and the laser beam is received on the horizontal drain material embedded ship to detect a displacement of the hull with respect to the horizontal drain material embedded design line, and the detection thereof. It is to align the horizontal drain material embedded ship with the horizontal drain material embedded design line by operating the tow point adjustment device according to the changed position and changing the tow rope connection position. For example, an operation wire that supports a pair of tow rope connectors that are led out from pulleys provided on both sides of the ship width side of the hull, and a winch that is installed on the hull and that adjusts the operation length of both the operation wires. Use one.

(Operation) In the present invention, the hull is towed forward while applying constant tension to the tow ropes in front of and behind it. If wind or running water acts laterally on the hull during this forward movement, the position and orientation of the hull will be displaced from the drain material embedded design drawing line by the external force. This deviation is due to the light receiver on the hull
It is accurately detected by receiving the laser beam emitted from the land along the embedded design line. Then, according to the detected change, the position of the tow rope connector in the ship width direction relative to the hull is moved by the tow point adjusting device. Due to this, the direction of the traction line with respect to the hull changes, and the hull position and direction are adjusted.

(Embodiment) Next, an embodiment of the present invention will be described with reference to FIGS. The same parts as those in the conventional example described above are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 shows the overall arrangement of the apparatus for carrying out the method of the present invention, in which the shores 7A and 7B sandwiching the soft ground 5 are provided with bulltozers 20A and 20B constituting reaction equipment, respectively. Pulleys 10A, 10B that guide the tow ropes 9A, 9B are supported by the bulltozers 20A, 20B. Also tow rope 9
A and 9B are wound around the land on the opposite shore by winching winches 8A and 8B, so that they can be wound and unwound.

The hull of the horizontal drain material buried ship 4 is provided with traction point adjusting devices 21A and 21B at the bow and stern, respectively. Both of the towing point adjusting devices 21A, 21B are, respectively, a winch 22 fixed to the hull, and pulleys 23a provided on both width-side edges of the hull,
23b and left and right operation wires 24a and 24b wound around the winch 22 and wound around the ends around pulleys 23a and 23b, and the ends of both operation wires 24a and 24b are tow rope connecting tools 2
It is connected to and supports 5A or 25B.

In this way, the front and rear tow ropes 9A and 9B are connected at their front ends to the front and rear tow rope connecting devices 25A and 25B supported by the both tow point adjusting devices 21A and 21B.

Thus, the two towing point adjusting devices 21A and 21B are
By operating one of the operation wires 24a or 24b on one side of the winch 22, the other side of the operation wire 24a or 24b is reeled out.
The position of 5B changes in the ship width direction.

A laser receiver 30 is installed horizontally on the side of the hull, and a laser emitter 31 and a laser receiver 32 are installed on both banks 7A and 7B, and the drain material is embedded from the laser emitter 31. A laser beam parallel to the planned line is emitted, and the laser light receiver 30 of the hull constantly receives this. The land laser receiver 32 is used when the laser beam from the laser emitter 31 is set at a required angle.

As the laser receiver 30 on the hull, one that can detect the irradiation position and the displacement of the angle of the laser beam applied to it is used, and each pulling point adjusting device 21A, 21 according to the change detection signal.
In order to operate the winch 22 of B, a signal is sent to its driving means so that the positions of the tow rope connecting devices 25A and 25B can be changed.

Further, a stabilizer 4a is provided on the bottom of the hull so as to project in the front-rear direction as shown in FIGS. 3 and 4, and the straightness is maintained by being penetrated into the soft ground 5 and propelled. It has become so.

Next, a boat maneuvering method using the above device will be described.

As shown in FIG. 1, the above-mentioned bulltozers 20A, 20B are moved to change the positions of the pulleys 10A, 10B, and the tow ropes 9A, 9B are superposed on the desired drain material embedding design line A (shown in FIG. 5). The horizontal drain material embedded ship 4 is towed and moved from one shore 7B side to the other shore 7A via the tow rope 9A by the towing operation winch 8A. At this time, the laser beam 31a from the laser light emitter 31 is always received by the light receiver 30 on the hull, and when the hull deviates from the drain material embedding design line A, the change is detected and a signal is output. To do.

In this way, while the horizontal drain material embedded ship 4 is being moved to one side, the horizontal drain material embedded ship 4 receives a cross wind and the tow ropes 9A and 9B bend and the hull 4 is moved as shown in FIG. Is deviated from the drain material embedding design line A, the laser beam irradiation position by the light receiver 30 is displaced, and the deviation is detected.

In response to this deviation detection, as shown in FIGS. 5B and 6, the tow rope connecting device 25 by the tow point adjusting devices 21A and 21B.
The positions of A and 25B are displaced, and as a result, as shown in Fig. 5 (C), the horizontal drain material-buried ship 4 is turned and towed, and the resistance received by the mud surface causes the hull to move to Fig. 5 (C). It advances in the direction of the arrow shown and is moved to a predetermined horizontal drain material embedded design drawing line A as shown in FIG. When the light receiver 30 detects that the hull moves on the horizontal drain material embedded design line A, the light receiver 30 again connects the tow ropes of the tow point adjusting devices 21A and 21B as shown in FIG. 5 (e). The positions of the tools 25A and 25B are returned to the original positions, and thereby the horizontal drain material embedded ship 4 moves on the horizontal drain material embedded design line A.

In this way, the drain material burial vessel 4 is moved from the shore 7B to the shore 7A side, and after one step of burial is completed, the winding of each winch 8A, 8B is loosened and the two bulltozers 20A, 20B are replaced with the next drain material design plan. Move to the line position by one pitch and move from shore 7B to shore 7A as described above.

In the above-described embodiment, the bulldozer is used as the reaction force equipment, but other movable reaction force equipment may be used, and the winch 22 is automatically operated by the displacement detection by the light receiver 30. Besides the structure, the winch 22 may be manually operated.

(Effects of the Invention) As described above, the operation method for a horizontal drain material-embedded ship according to the present invention is such that the horizontal drain material-embedded ship can be freely moved by a tow rope stretched between opposite shores and a towing operation winch provided on both banks. None, and the laser light emitter emits a laser beam parallel to the horizontal drain material embedded design line, and the light receiver installed on the hull receives this light, and the traction point is adjusted according to the displacement of the hull position detected by the light receiver. By moving the position of the tow rope connecting device by the device and adjusting the relative position of the hull with respect to the towing direction so that it follows the desired horizontal drain material embedding design line, the operation of the horizontal drain material embedding ship can be performed with a simple operation. The straightness can be maintained with high accuracy, and the drain material can be embedded at a uniform density.

[Brief description of drawings]

FIG. 1 is a plan view showing the arrangement of an apparatus used in the present invention, FIG. 2 is a plan view of a hull portion of a horizontal drain material burying ship, and FIG.
FIG. 4 is a side view, FIG. 4 is a front view, FIGS. 5 (a) to (e) are plan views for explaining the ship maneuvering method, FIG. 6 is a partially enlarged plan view of the same, and FIG. Side view of a horizontal drain buried ship,
FIG. 8 is a plan view showing the same operating method. A: Horizontal drain material embedded design line, 1 ... Drain material,
2 ... Reel, 3 ... Drain material embedding guide, 4 ... Horizontal drain material embedding vessel, 5 ... Soft ground, 7A, 7B ... Shore, 8
A, 8B …… Winding for towing operation, 9A, 9B …… Towing rope, 1
0A, 10B, 23a, 23b …… Pulley, 20A, 20B …… Burtosa, 21
A, 21B ...... Pull point adjustment device, 22 ...... Winches, 24a, 24b ...
… Operating wires, 25A, 25B …… Tow rope connections, 31…
… Laser emitter, 31a …… Laser beam, 30,32 …… Receiver.

Claims (2)

[Claims] 1. A method of maneuvering a horizontal drain material-embedded ship, wherein the hull of the horizontal drain material-embedded ship floating on soft ground is towed by a towing means installed on the opposite bank. At the stern, a tow point adjusting device that can adjust the position of each tow rope connecting device to the ship width direction side is provided, and through both tow rope connecting devices,
A tow rope is stretched in front of and behind the hull, the hull is moved while maintaining a constant tension on the both tow ropes, and a laser beam is emitted from land parallel to the drain material embedding design line,
The laser beam is received on the horizontal drain material embedded ship to detect the displacement of the hull with respect to the horizontal drain material embedded design line, and the tow point adjustment device is operated according to the detected displacement amount to connect the tow rope. A method for manipulating a horizontal drain material burying ship, characterized by aligning the horizontal drain material burying ship with a horizontal drain material burying design drawing by changing the position. 2. An operation wire for supporting a pair of tow rope connecting members led out from pulleys provided on both edges of a ship body on the width side of the ship,
The method for maneuvering a horizontal drain material-embedded ship according to claim 1, wherein a towing point adjusting device installed on a hull and configured with a winch for adjusting operation lengths of the both operation wires is used.