JPH0742702B2 - Underwater casting equipment for asphalt - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for driving asphalts on the seabed or the like, and more particularly to a device for uniformly driving asphalts in water without cooling them.

[0002]

2. Description of the Related Art When constructing a coastal structure such as a breakwater or a seawall, a rubble foundation is constructed as the foundation of the structure, and the upper portion of the foundation is leveled and then the upper structure such as caisson is removed. A means for constructing and arranging a wave breaking member such as a tetrapod on the side of the structure is generally used. When constructing the coastal structure in a place with rough waves, in order to prevent the rubble foundation from being destroyed by the waves, asphalt is poured between the rubble foundation to consolidate the rubble foundation. Means may be used. In addition, even in places where the tide is relatively fast, as a means of protecting the rubble foundation, it is practiced to construct a rubble foundation on the sea floor and at the same time pour in asphalt to protect the rubble foundation.

In order to apply the asphalt,
For example, as disclosed in Japanese Examined Patent Publication No. 55-42205, a method of driving asphalts to the seabed using a hose is used. The placing device used in the above-mentioned conventional example is configured as shown in FIG. 6, and the double pipe from the hopper 11 of the placing device 10 which is suspended via a wire 18 to a marine crane or the like. 12 and the flexible hose 13 are extended so that the tip of the flexible hose 13 reaches the seabed. And
The asphalt thrown into the hopper 11 flows down in a state where the double pipe and the flexible hose are pushed and spread, and is supplied toward the rubble foundation 1. Due to the fluidity of the asphalt 2, the asphalt 2 flows between the rubbles to fill the gaps between the rubbles, and the stones forming the rubble foundation 1 are solidified by the asphalt 2 so that the rubble foundation can be protected.

In addition to the asphalt driving method using the hose, a driving apparatus 1 as shown in FIG.
5 may be used in some cases. In the driving apparatus shown in FIG. 7, the bucket 16 containing asphalt is hung on a crane or the like via a wire 18, and the bucket 16 is lowered into the sea at the construction site, and then the opening / closing lid 17 is opened. So that the asphalts will flow down on the rubble foundation.
Then, as in the case of FIG. 6, the asphalt is poured into between the stones of the rubble foundation to fill the gaps between the stones.

The asphalt construction method as described above is used, for example, for protection of seawalls in fast-flowing sea areas and in areas with rough waves. By protecting the rubble foundation, It is used as a means of protecting the structure constructed above it from the effects of waves. The asphalt used to protect the rubble foundation is a mixture of asphalt called sand mastic, gravel mastic, etc. and sand or aggregate. Then, the asphalts are constructed on the seabed or the like in a state of having fluidity at high temperature.

[0006]

The underwater asphalt casting apparatus as shown in FIG. 6 or 7 is, for example, as shown in FIG. 8 when the asphalt is constructed on the seabed. The asphalts to be applied first are applied with the casting layer 3 that allows the asphalt to be inserted between the stones of the rubble foundation 1. Then, by performing the second placement work,
The protection layer 4 is constructed on the surface of the rubble foundation. Then, each time the placement work is performed, the diver positions the tip of the flexible hose 13 at the placement location, puts the asphalt into the hopper of the placement device as shown in FIG. The asphalt 2 is constructed at a predetermined position of. Further, also in the case of a placing device using a bucket, a diver uses a means for opening the bottom plate of the bucket at the construction site and constructing asphalt.

However, when the asphalts are constructed on a deep seabed, the conventional construction method as described above has a problem that the asphalts are easily cooled by seawater having a low temperature during the placing work. And as a result of being cooled, the viscosity of asphalts becomes high and the fluidity decreases, making it difficult to enter between the stones of the rubble foundation,
Even if a large amount of waste is thrown in at one time, it is difficult to spread it over a large area of the rubble foundation.

Further, in the case of the method using the bucket,
Asphalt, which is cooled from the wall surface in water during the installation work on the sea floor for placing, tends to adhere to the inner surface of the bucket, and there is a big problem in cleaning the bucket after the work. . On the other hand, in the case of the system using a flexible hose, the smaller the diameter of the hose, the easier it is to cool the asphalts passing through it, and the larger the diameter of the hose, the larger the hose can move in the deep sea floor. It also forces the diver to do very difficult work and has many problems in terms of workability.

[0009]

An object of the present invention is to solve the above-mentioned problems in the construction of conventional asphalts, and when the asphalts are driven by a bucket on the seabed or the like, the bucket is underwater during the driving operation. Without cooling the asphalt inside, it remains fluid at sufficiently high temperature,
It is an object of the present invention to provide a device that enables uniform placement of asphalt in a wide range.

[0010]

In the underwater asphalt placing apparatus of the present invention, an opening / closing lid is arranged at the bottom of a bucket suspended by a crane or the like, and asphalt is prevented from adhering to the inner surface of the bucket. Means are provided and a heat insulating layer is formed on the steel plate forming the bucket. Further, in the present invention, a heat insulating sheet with a release agent for covering the upper surface of the asphalt that has been put into the bucket can be attached, and further, it can correspond to the inclination angle of the underwater foundation or the like. As described above, the leg member can be attached to the outer lower side of the bucket, and the leg located on the lower side of the slope of the underwater foundation or the like of the leg member can be configured to be expandable and contractable.

With the above-described structure, in the asphalt underwater driving apparatus of the present invention, when the asphalts are driven by the bucket on the seabed or the like, the asphalts in the bucket can be removed underwater during the construction work. It is possible to cast asphalts in a state of having fluidity at a sufficiently high temperature without cooling. And asphalts easily enter between the stones of the rubble foundation, and even if a large amount is thrown at once, it spreads over a large area of the rubble foundation, so that it is possible to construct asphalt in a large area by one-time placement. Become.
Also, asphalts do not adhere to the inner surface of the bucket by keeping the asphalts warm and providing a means to prevent the asphalt from adhering to the inner surface of the bucket by coating with fluororesin. Can be omitted. Further, in the device of the present invention, of the leg members attached to the lower outside of the bucket, by adjusting the length of the leg located on the lower side of the slope, even for the inclined portion of the rubble foundation, etc. The bucket can be fixed in the correct posture according to the inclination, and the asphalt construction work can be easily performed along the inclined surface.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The underwater casting apparatus for asphalts according to the present invention will be described with reference to the illustrated example. The driving apparatus 20 of the present invention shown in FIG. 1 has legs 23a, 23 at four corners.
The bucket 21 is installed on the upper portion of the frame 22 provided with the leg member 23 including a, 23b, and 23b. Also,
The main body of the bucket 21 is composed of a side wall portion 24 that surrounds a storage portion for asphalt and an opening / closing lid 25 that forms a bottom portion of the storage portion. As shown in FIG. 2, the placing device 20 configured as described above connects the wire 18 via the attaching means 28 provided on the upper portion of the bucket 21 and suspends the wire 18 via the hook 19 of the crane. To do.

In the above apparatus, as shown in FIG. 5, the steel plates constituting the side wall portion 24 and the bottom opening / closing lid 25 of the bucket 21 are steel plates 24a, 24b,
It has a double structure composed of 25a and 25b, and a heat insulating material 60 (air, asphalt, two-component curing type rubber, foamable synthetic resin, etc.) is built in between them to have a thickness of about 50 mm. Then, the inner surface of the bucket 21 and the portion in contact with the asphalt are coated with adhesion preventing means 51 such as fluororesin or silicone resin so that the asphalt 2 can be prevented from adhering to the wall surface.

In addition, in the asphalt storage portion in such a bucket 21, heat insulation with a release agent is placed on the asphalt stored in the asphalt and having a high temperature and fluidity to cover the asphalt. A seat 50 is attached. The heat insulating sheet 50 is held by a suitable connecting means 52 such as a string so as not to fall off from the bottom portion of the bucket 21 when the asphalt is discharged.

Further, in the above apparatus, the frame 21
The leg members 23 provided at the four corners of the
The ground contact portions of a, 23b, and 23b are located below the outside of the bucket 21. Then, the two legs 23b, 2 on one side
As shown in FIG. 4, 3b is configured to be expandable / contractible by pinning or the like, and is configured to be able to cope with an inclination angle of a submerged foundation or the like when it is installed on the slope of the seabed.

The bottom portion of the bucket 21 in the above-mentioned apparatus has two opening / closing lids 25 attached via hinges 26, 26 provided at the lower ends of the opposite side walls of the bucket 21.
25, and the opening / closing lids 25, 25 are attached to both sides from the center of the bottom portion so as to open and close in a double-door manner. In the vicinity of the center of the bottom portion of the bucket, the pin members 27, 27 are projected on the side surfaces of the opening / closing lids 25, 25, and the side wall portion 24 of the bucket 21 at a position corresponding to the pin members 27, 27, Engaging portions 31, 3 with the pin members 27, 27
The hooks 30, 30 having 1 are rotatably attached by shafts 32, 32. And the hooks 30, 3
When the engaging portions 31, 31 of 0 are engaged with the pins 27, 27, the bottom portion is kept in a closed state so that the asphalt contained in the bucket does not leak out. .

As a means for opening and closing the bottom portion of the bucket 21, for example, interlocking means as shown in FIGS. 1 to 3 can be used. That is, the manual lever 33 and the rotating member 34 are fixed to the end of the shaft 41 rotatably supported by the side wall 24 of the bucket 21, and
Rotating member 34 and members 35, 36, 3 connected to it
7 and 38 form a link mechanism, and the hooks 30 and 30 center on the shafts 32 and 32 in association with the rotation of the rotating member 34 that is rotated about the shaft 41 via the link mechanism. It is configured to rotate to.

A manual lever 33 is fixedly attached to the end of the shaft 41, and the central portion thereof has a
A remote control lever 39 that is operated by the remote control rope 14 is fixed, and either the manual lever 33 or the remote control lever 39 is configured to operate the link mechanism as described above. There is. The link mechanism and hook 30 as shown in the above embodiment.
The pins 27 are similarly formed on the opposite side walls of the bucket 21. If the pin 27 is formed of a roller having a built-in bearing, the engagement and disengagement of the hook 30 with the engaging portion 31 can be made smooth.

As shown in FIG. 2, the casting device 20 as described above, in a state in which a predetermined amount of asphalt 2 is contained in the bucket 21, has a heat insulating sheet 50 with a release agent from the top thereof. Place asphalt 2 so that it does not come into direct contact with seawater. Then, it is hung by the hook 19 of the crane and lowered to the work site on the seabed, and the lower part of the leg member 23 of the placing device 20 is placed on the rubble foundation 1 on the rubble foundation constructed on the seabed according to the instructions of the diver. Install it in the place where it will be placed while it is positioned at. Then, the diver rotates the manual lever 33 downward to operate it, or the rope 1 of the crane operator.
4, the hook 30 is disengaged from the pin 27 via the link mechanism by pulling up the remote control lever 39 to release the support state of the hook 30 with respect to the opening / closing lid 25, and the bucket 21 The opening / closing lid 25 of 1 is opened and the asphalt is discharged from the bucket 20.

By the action of opening the opening / closing lid 25, the asphalt 2 contained in the bucket 21 is discharged all at once to the upper part of the rubble foundation 1.
Since the amount of asphalt 2 corresponding to the area is stored, the asphalt 2 is discharged in a small mountain shape in the area corresponding to the size of the bucket 21. And the discharged asphalt 2
Is kept at a high temperature because it is kept warm by the heat insulating layer 60 and the heat insulating sheet 50 while being stored in the bucket 21, and due to its fluidity, it flows down into the rubble stone gap to fill the gap, The first placement is carried out by continuing. Next, when forming a second layer of asphalt, the asphalt is cast by the same operation on the layer that was first cast. When the placing apparatus 20 of the present invention is used, the asphalts 2 stored in the bucket 21 can be placed while being kept at a high temperature, so that the asphalts 2 can be evenly placed in a fluid state.

The above-mentioned description of the embodiment with reference to FIG. 3 is for the case where asphalts are constructed on the upper part of a substantially flat rubble foundation, but it is applied to the sloped part of the rubble foundation. When constructing asphalt,
If the setting device 20 is in the state as shown in FIG. 3, it is difficult to work in a stable state. Therefore, for a place such as an inclined portion of a rubble foundation, the placing device 20 is attached to the lower outside of the bucket 21 via the frame 22 as shown in FIG. The two legs 23b, 23b on the lower side of the slope when installed on the slope of the seabed can be extended so as to correspond to the inclination angle of the underwater foundation or the like.
Then, by positioning the leg to an appropriate length and then fixing the leg by pinning or the like, the bucket 21 can be arranged in an appropriate posture corresponding to the inclined portion, and the bucket 21 can be placed on the inclined surface. The construction work of the asphalt 2 along can be easily performed.

[0022]

INDUSTRIAL APPLICABILITY Since the underwater asphalt casting apparatus of the present invention has the above-mentioned structure, the asphalt in the bucket is not cooled in water during the construction work on the deep seabed. Asphalt can be cast while maintaining fluidity at a sufficiently high temperature. Therefore, when asphalts easily enter between the stones of the rubble foundation, and when a large amount of asphalt is placed at one time with a relatively large bucket on the seabed, the asphalt spreads over a large area of the rubble foundation. Asphalt can be constructed on a large area by placing. Also, since the inner surface of the bucket is provided with a means for preventing asphalt adhesion,
Asphalt does not adhere to the wall surface of the bucket, which saves the trouble of cleaning the bucket after the work. Further, among the leg members attached to the lower outside of the bucket, if at least the leg on the lower side of the slope is configured to be expandable and contractable, the bucket can be properly adjusted according to the inclination of the inclined portion of the rubble foundation. It can be fixed in various postures, and the construction work of asphalts along the inclined surface can be easily performed.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a driving apparatus of the present invention.

FIG. 2 is a side view showing the configuration of the driving apparatus of the present invention.

FIG. 3 is an explanatory view of a construction state of asphalt using the driving apparatus of the present invention.

FIG. 4 is an explanatory view of a construction state of asphalt on an inclined surface using the driving apparatus of the present invention.

FIG. 5 is an explanatory diagram of a bucket body of the present invention.

FIG. 6 is an explanatory diagram of a conventional asphalt construction device.

FIG. 7 is an explanatory diagram of another conventional asphalt construction device.

FIG. 8 is an explanatory view of a construction state of asphalt using the apparatus shown in FIG.

[Explanation of symbols]

1 rubble foundation, 20 placing device, 21 bucket, 22 frame, 23 leg member, 24
Open / close lid, 50 Insulation sheet with release agent, 51
Adhesion prevention means, 60 heat insulating layer.

Claims (3)

[Claims] 1. An opening / closing lid is arranged at the bottom of a bucket suspended by a crane or the like, an asphalt adhesion preventing means is provided on the inner surface of the bucket, and a heat insulating layer is formed on the inner surface of a steel plate forming the bucket. Underwater casting equipment for asphalts, characterized by: 2. The underwater asphalt placing apparatus according to claim 1, further comprising a heat insulating sheet with a release agent attached to cover an upper surface of the asphalt placed in the bucket. 3. The leg member is attached to the lower outside of the bucket, and the leg located on the lower side of the slope of the underwater foundation or the like of the leg member is configured to be expandable and contractable. Underwater casting device for asphalt.