JP2002029492A - Work barge having a plurality of functions - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work barge having a function of performing a plurality of works such as a sand column developing work and a sand removing work for ground improvement in an ocean civil engineering work. SOLUTION: A device for supporting casing pipes 3 liftably along leaders 2 stood on a pontoon 1 and developing sand columns by injecting sand from a sand injection hole at the upper end comprises intermediate injection holes 4 openable/closable by external pipes 5 in the intermediate parts of the easing pipes 3, intermediate hoppers mountable on the parts of the intermediate injection holes 4, additionally, shoe members 32 at the lower ends of the easing pipes, and exchangeable sand removing hole members. In addition to the sand column developing work in a blocking state of the intermediate injection holes, the sand removing work is allowed by opening the intermediate injection holes to mount the intermediate hoppers, mounting the sand removing hole members on the lower ends, and injecting sand from the intermediate hoppers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work boat mainly used in offshore civil engineering work, and more particularly to a work boat provided with a plurality of functions such as sand column formation and sand transport.

[0002]

2. Description of the Related Art Conventionally, in civil engineering work such as land reclamation work in the ocean, sand laying work, sand column creation work for ground improvement, and crane work such as caisson laying have been conventionally performed. Various works such as the earth unloading work were performed by dedicated work boats each having a single function. That is, a plurality of workboats enter and leave for each operation, and each time, towing and mooring are required, and the costs are incurred.

[0003] Further, each workboat requires not only the hull of the barge but also common facilities such as a residential area and a mooring device, and the total cost of the entire offshore civil engineering work by these fleets is high. There was also the problem of getting on.

[0004] In view of the above, the present invention provides a work boat having a function of performing a plurality of works such as a sand column forming work and a sand transport work for improving the ground in marine civil engineering works. is there.

[0005]

SUMMARY OF THE INVENTION The present invention is a work boat having a plurality of functions for solving the above-mentioned problems. The first invention is characterized in that the work boat is provided to stand substantially vertically on a barge. Along the leader, a casing pipe having a sand inlet at the upper end is supported so as to be able to move up and down. In a work boat provided with a device, an intermediate hopper that can be opened and closed is provided at an intermediate portion of the casing pipe, and an intermediate hopper that can be attached so that sand can be introduced into the intermediate inlet, and a lower end of the casing pipe Separately provided with a shoe member and a replaceable spouting port member, and separate from the sand column creation work in a state where the intermediate input port is closed, open the intermediate input port to open the intermediate hopper. take Kicking with, attach the spout for sand spraying into the lower end, and sand was put from the intermediate hopper, characterized in that so as to perform the sanding operation.

[0006] According to this work boat, during the sand column forming operation in the sand drain method or the sand compaction method, the intermediate charging port provided in the intermediate portion of the casing pipe is closed without using an intermediate hopper for sanding. In this state, the shoe at the lower end of the casing pipe is driven into the underwater ground, and sand is injected from the sand inlet at the upper end to form a sand column.

In the sanding operation, the intermediate inlet is opened, an intermediate hopper is attached so that sand can be injected into the intermediate inlet, and a shoe member at the lower end is used for sanding. What is necessary is just to replace and fix it to a mouth member, and by throwing in sand from the said intermediate hopper, a sanding operation can be performed using a casing pipe as a tremy tube. Further, when performing the sand column creation operation again, the intermediate hopper may be removed, the mouth member at the lower end may be replaced with a shoe member for sand column creation, and the intermediate charging port may be kept closed.

In the above-mentioned work boat, it is desirable that an outer pipe capable of closing the intermediate charging port is inserted into the intermediate portion of the casing pipe so as to be vertically movable and fixed at an arbitrary position. That is, the intermediate inlet can be easily opened and closed by fixing the outer pipe at a position covering the intermediate inlet of the casing pipe, or by fixing the outer pipe off the intermediate inlet. Also, by adjusting the fixing position of the outer tube, the opening of the intermediate inlet can be adjusted according to the water depth. Moreover, by fixing the outer pipe to the intermediate inlet, the intermediate inlet of the casing pipe can be reinforced.

In addition to the above invention, the intermediate pipe portion of the casing pipe is provided so as to be replaceable with an intermediate pipe portion having a sand injection port for sanding, and the shoe member at the lower end is provided with an opening for sanding. It is also possible to provide such a structure that it can be replaced with a member, and to perform a sanding operation separately from the sand column forming operation.

In any of the above inventions, a crane device is installed on the barge separately from the sand column forming device,
Crane work can be performed. Further, a conveying pipe and / or a conveyor for the earth unloading may be provided by utilizing the boom of the crane device, so that the earth unloading operation can be performed.

In addition, by mounting a spreader device having a built-in conveyor or a conveying pipe in place of the crane device, it is possible to perform a lifting operation as a reclaimer ship or a casting operation of cement mixed soil. it can.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the embodiments shown in the drawings.

FIG. 1 is a schematic plan view of a working boat according to an embodiment of the present invention, FIG. 2 is a schematic side view of the same, FIG. 3 is a schematic front view of a leader side of the same, and FIG. FIG. 5 is a schematic front view showing a state of a casing pipe at the time of formation, FIG. 5 is an enlarged front view of a part of the intermediate inlet portion of the same, and FIG. 6 is a front view showing a state of the casing pipe at the time of sanding. FIG. 2 is an enlarged front view of a part of the intermediate inlet portion of the same.

In the figure, (1) is a barge, and (2) is a stand supported by a frame (21) at one end in the bow-sail direction of the barge (1) so as to maintain a substantially vertical posture. It is a reader that has been set up. (3) is a casing pipe supported by guide means (not shown) as appropriate along the leader (2) so as to allow vertical movement and suspended by a sheave (22). Usually, it is suspended via the exciter (23) by the sheave (22). (24) is a winch for winding up.

The casing pipe (3) is provided at the upper end thereof with a charging hopper (31) constituting a sand charging port, and at the lower end thereof, a shoe member (32) for driving into the seabed (E) in the ocean or the like. Is attached, and can be driven into the underwater ground (E) as shown in FIG. 4 when sand columns are formed.

An openable / closable intermediate inlet (4) for sanding is provided at an intermediate portion of the casing pipe (3).

In the case of the drawing, the intermediate inlet (4) is formed by a notch opening in the form of a long hole (vertical direction) of the casing pipe (3), and the intermediate inlet (4) can be opened and closed. As a configuration, an outer pipe (5) capable of closing the intermediate charging port (4) is inserted into the casing pipe (3) so as to be vertically movable. The outer pipe (5) is fixed at a position where the intermediate inlet (4) is closed as shown in FIG. 5 when sand columns are formed, and as shown in FIGS. 6 and 7 when sand is scattered. By displacing and fixing the position (5), a part or all of the intermediate charging port (4) can be opened.

Reference numeral (6) denotes a stopper piece for fixing and supporting the outer tube (5) at an arbitrary position. The stopper piece is provided on the casing pipe (3) by a fastening means (6a) such as a bolt or a nut. It can be attached and fixed at the position. By adjusting the fixing position, the opening of the intermediate inlet (4) can be adjusted according to the water depth. The outer pipe (5) can be fixed at a position where the intermediate inlet (4) is closed using the stopper piece (6) even when the sand column is formed. 5), it is desirable that the upper and lower ends be fixed to the casing pipe (3) by welding means as shown in FIG. (5a) shows a weld.

An intermediate hopper (7) is separately mounted so that sand can be introduced into the intermediate charging port (4) of the casing (3), as shown in FIG.
In a state where the fixing position of the outer pipe (5) is shifted and the intermediate inlet (4) is opened, fastening means (for example, bolts, nuts, etc.) on the outer pipe (5) to the casing pipe (3) are used. It can be mounted and fixed by 7a). When the intermediate hopper (7) is not used at the time of sand column formation or the like, the intermediate hopper (7) is stored in a place that does not disturb the work near the leader (2) of the barge (1), for example.

(8) A spouting port member which is replaceable with the driving shoe member (32) at the lower end of the casing pipe (3). It is formed so that sand can be scattered almost uniformly and efficiently over the entire spreading width. As means for fixing the mouth member (8) to the lower end portion of the casing pipe (3), since a certain amount of welding repair is performed on the ship, the shoe member (32) is mounted on the casing pipe (3). ), It is preferable to fix the mouth member (8) by welding means. That is, the shoe member (32) and the mouth member (8) can be detachably provided to the lower end of the casing pipe (3) by fastening means such as bolts and nuts. It is preferable to use the welding means described above.

When the mouth member (8) and the shoe member (32) replaced with the mouth member (8) are not used, respectively,
For example, it is stored in a place near the reader (2) that does not disturb the work.

(10) is a skip bucket arranged at the tip of a conveyor (11) for sand column formation and sanding,
At the time of sand column formation, sand can be injected from the sand inlet at the upper end of the lowered casing pipe (3), that is, the input hopper (31), and when sand is scattered, the intermediate hopper ( 7) It is provided so that more sand can be charged. Therefore, the tip side of the bucket (10) and the conveyor (11) can move up and down, and can be adjusted according to the height of the input hopper (31) or the intermediate hopper (7) by the up and down movement of the casing pipe (3). The height can be adjusted.

(12) in the figure is a hopper for sand supply, (13)
Reference numeral 14 denotes a hopper that serves both as a sand supply and as a ground excavator, and reference numeral 14 denotes a horizontal conveyor that conveys sand for forming or blasting sand from the hoppers 12 and / or 13.

The working boat of the illustrated embodiment further has the following configuration.

(15) is a vertical lifting conveyor arranged in a direction intersecting with the conveyor (14). As shown in FIG. 8, a delivery chute provided below the hopper (13). By rotating (13a) by 90 ° (angle),
It is configured to selectively use the case where sand is sent to the horizontal conveyor (14) and the case where earth is sent to the earthing conveyor (15).

(16) is a crane device installed at the end opposite to the leader (2), and is provided so that a crane operation can be performed separately from the sand column forming operation and the sand dispersing operation. Using the internal space of the crane boom (17) in the crane device (16), as shown in FIGS. 9 and 10, the unloading conveyor (18a) connected to the unloading conveyor (15). Alternatively, an unloading pipe (18b) is provided so that the unloading operation can be performed. The lifting conveyor (15) and the unloading conveyor (18a)
Alternatively, it is connected to the discharge pipe (18b) by using, for example, a flexible tube so as to allow a crane operation such as turning and vertical movement of the crane boom (17). (1
Reference numeral 9) denotes a connection transport section for connecting to the pump of the pumping vessel, and is provided so that the earth and sand pumped from the pumping vessel can be carried out by the carry-out conveyor (18a) or the carry-out pipe (18b).

Instead of the crane device (16), a spreader device (27) is installed as shown in FIG.
A transport means (28) such as a conveyor or a transport pipe may be provided in the spreader so as to perform a lifting operation as a reclaimer ship or a casting operation of cement mixed soil (mud soil). (29) is a tower for holding the spreader for supporting the spreader so that the spreader can turn and undulate.

Also in this case, the conveying means such as a conveyor and a conveying pipe built in the spreader are provided so as to allow movement of the spreader such as turning and undulating movement. In addition, a backhoe or the like can be provided as necessary.

Reference numeral (25) denotes a ship operation room, which is provided with a ship operation panel for sand column formation and sand scattering work, and an operation panel for crane operation and earth unloading operation. (26) is a mooring machine.

When the work boat of the above-described embodiment is used to form a sand column in the sand drain method or the sand compaction method, the intermediate pipe hopper (5) for sanding is not used and the middle of the casing pipe (3) is used. An outer pipe (5) is fixed to a portion of the intermediate inlet (4) provided in the portion, and the intermediate inlet (4) is closed (FIG. 5), and as shown in FIG. In 3), sand is poured from the shoe (32) at the lower end into the underwater ground (E) and sand is injected from the input hopper (31) as a sand inlet at the upper end to form a sand column.

In the sanding operation, the fixing position of the outer pipe (5) is shifted downward as shown in FIG. 7 to open the intermediate input port (4). Attach the intermediate hopper (7) so that sand can be put into the part (4). At this time, by adjusting the fixing position of the outer tube (5), the opening of the intermediate inlet (4) can be adjusted according to the water depth. Further, the shoe member (32) at the lower end is cut from the casing pipe (3), and instead, a mouth member (8) for sanding is fixed to the lower end of the casing pipe (3) by welding means. In this way, the height of the mouth member (8) is maintained at a certain height from the bottom of the water, and sand is thrown in from the intermediate hopper (7), so that the casing pipe (3) is trammed for sanding. Use as a pipe to perform sanding work.

When the sand column formation work is to be performed again, the intermediate hopper (7) is removed, and the mouth member (8) at the lower end is replaced with a shoe member (32) for sand column formation. (4) may be maintained in a closed state, and the sand may be formed from the sand ヲ charging hopper (31) in the same manner as described above. At this time, by fixing the outer tube (5) so as to cover the portion of the intermediate inlet (4),
The outer pipe (5) prevents weakening due to the formation of an opening as an intermediate inlet (4) in a part of the casing pipe (3), and can maintain the strength required for sand column formation. Such an effect is particularly remarkable when the outer pipe (5) is fixed to the casing pipe (3) by welding means.

Further, apart from the above-mentioned work, the crane device (16) on the opposite side and the unloading conveyor (18a) and the unloading tube (18b) mounted on the boom (17) are used for crane operation. Work and excavation work can also be performed.

Further, as shown in FIG. 11, a spreader device (27) having a built-in transport means (28) such as a conveyor or a transport pipe may be used to perform a lifting operation as a reclaimer ship or a casting operation of cement mixed soil. it can.

That is, a single work boat can perform a plurality of civil engineering works such as sand column formation and sanding, as well as crane and earth unloading.

In the above embodiment, an intermediate inlet (4) is provided at an intermediate portion of the casing pipe (3) so that it can be opened and closed by the vertical movement of the outer pipe (5). Although the case of attaching is shown, in addition to this, although not shown, the intermediate pipe portion of the casing pipe is provided so as to be replaceable with another intermediate pipe portion having a sand inlet for sanding, It is also possible to replace the shoe member at the lower end with a spouting mouth member so as to be able to perform sanding work separately from the sand column creation work. It can be used both as a casing for sand column creation and a tremy tube for sanding.

[0037]

As described above, according to the work boat of the present invention, the casing pipe for sand column construction can be used as a tramming pipe for sanding, and therefore can be used in civil engineering works such as land reclamation work in the ocean. Efficient sand column creation and sanding for ground improvement can be performed efficiently with a single work boat, and multiple tasks such as crane work such as caisson laying and earth unloading work can also be performed with a single work boat. And the operating rate can be improved.

As a result, there is no need for a work boat to enter or leave the sea for each work, and the costs required for towing and mooring can be reduced.
In addition, only a single accommodation area and mooring equipment are required for a plurality of workboats, and the total cost of the entire offshore civil engineering work can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a working boat according to one embodiment of the present invention.

FIG. 2 is a schematic side view of the same.

FIG. 3 is a schematic front view of the same reader side.

FIG. 4 is a schematic front view showing a state of a casing pipe during sand column formation.

FIG. 5 is a partially cutaway enlarged front view of the intermediate charging port portion according to the first embodiment.

FIG. 6 is a front view showing a state of a casing pipe at the time of sanding.

FIG. 7 is a partially cutaway enlarged front view of the intermediate charging port of the above.

FIG. 8 is a sectional view taken along line XX of FIG. 1;

FIG. 9 is a schematic sectional view of a crane boom portion.

FIG. 10 is a schematic sectional view showing another embodiment of the above.

FIG. 11 is a partial schematic side view showing still another embodiment of the present invention.

[Explanation of symbols]

 (1) Barge (2) Leader (3) Casing pipe (31) Input hopper (32) Shoe member (4) Intermediate input port (5) Outer pipe (6) Stop piece (7) Intermediate hopper (8) Port member (31) Input hopper (32) Shoe member (10) Skip bucket (11) Conveyor (12) Sand supply hopper (13) Hopper that is used for both sand supply and earth lifting (14) This is a horizontal conveyor. (15) Conveyor for unloading (16) Crane device (17) Boom (18a) Unloading conveyor (18b) Unloading tube (27) Spreader device (28) Transport means (29) Tower for holding spreader

Claims (6)

[Claims] 1. A casing pipe having a sand inlet at an upper end is supported so as to be able to ascend and descend along a leader standing substantially vertically on a barge, and the lower end of the casing pipe is driven into the bottom of the water bottom. A work boat equipped with a device for forming sand pillars by introducing sand from a sand input port of the above, wherein an openable and openable intermediate input port is provided at an intermediate portion of the casing pipe, and sand is input to the intermediate input port portion An intermediate hopper that can be attached so as to be able to be mounted, and a port member for sand scattering that can be replaced with a shoe member at the lower end portion of the casing pipe are separately provided, and a sand column forming operation in a state where the intermediate input port is closed. Separately, the intermediate charging port was opened and the intermediate hopper was attached, and a port member for sand scatter was attached to the lower end, so that sand could be thrown in from the intermediate hopper to perform the sand scattering operation. A work boat having a plurality of functions, characterized in that: 2. The plurality of casing pipes according to claim 1, wherein an outer pipe capable of closing an intermediate charging port is vertically movably fitted into an intermediate portion of the casing pipe so as to be fixed at an arbitrary position. Work boat with functions. 3. A casing pipe having a sand inlet at an upper end thereof is supported so as to be able to ascend and descend along a leader standing substantially vertically on a barge. A work boat provided with a device for feeding sand from a sand input port to form a sand column, wherein an intermediate pipe portion of the casing pipe is replaceably provided with an intermediate pipe portion having a sand input port for sanding. In addition, a plurality of functions characterized in that the shoe member at the lower end is provided so as to be replaceable with a mouth member for sanding cloth, so that sanding work can be performed separately from sand column creation work. Equipped workboat. 4. The work boat having a plurality of functions according to claim 1, wherein a crane device is installed on the barge separately from the sand column forming device so that crane work can be performed. 5. An operation having a plurality of functions according to claim 4, wherein a conveying pipe and / or a conveyer for excavation is arranged by utilizing a boom of said crane device, so that excavation work can be performed. ship. 6. A revolver-type spreader device is installed on a barge, and a conveying means such as a conveyor and a conveying pipe is provided in the spreader so that a reclaimer ship can perform a soil lifting operation or a cement mixed soil setting operation. A work boat provided with a plurality of functions according to any one of claims 1 to 3.