JP2920464B2 - Asphalt casting apparatus and construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt placing apparatus for constructing a foundation by placing asphalt flatly on a seabed, and constructing a structure on top of the foundation. A bucket device for accommodating the
The present invention relates to an apparatus which can integrally form an asphalt layer having a constant thickness by using an integrally formed form member for setting a range to be applied at a time, and a method of using the apparatus.

[0002]

2. Description of the Related Art When constructing a structure such as a breakwater or a seawall, a method of laying a rubble foundation as a foundation of the structure, flattening the upper part thereof, and placing a caisson or the like is used. Have been. When a structure such as the caisson is constructed, a method of laying an asphalt mat under the caisson may be used in order to prevent the caisson from moving under the influence of waves. As mentioned above, installing asphalt mats on rubble foundations is also used to prevent caisson-supporting rubble foundations from being scoured in rough seas. It is used, for example, as shown in Japanese Patent Publication No. Hei 4-46645. The support structure in the case of constructing the above-mentioned structure is, for example, constructed as shown in FIG. 9, where the submarine ground 2 is leveled, the rubble foundation 3 is constructed, and the asphalt mat 4 is placed thereon. And then constructing a structure 1 such as a caisson or seawall.

[0003] Asphalt mats to be laid under the structure 1 are generally transported to a construction site from a land-based manufacturing plant, and constructed on the sea floor using a crane or the like. In addition, the asphalt mat is manufactured as a plate-like member having a thickness of 5 to 20 cm and a length and a width of about 2 to 10 m. It is configured so that it can be easily performed. Further, as shown in FIG. 9, in addition to constructing the rubble foundation on the seabed ground so as to be raised high and constructing the structure thereon, the structure is directly constructed on the flat seabed ground. May be. When using such a construction method, after flattening the seabed ground, constructing a rubble foundation with a predetermined thickness, laying an asphalt mat on it, and constructing a structure such as a caisson be able to.

[0004]

As shown in the above conventional example, when a construction method of laying an asphalt mat under a structure is used, the asphalt mat is manufactured on land and then transported to a construction site. It is necessary to use a crane device loaded on a barge or the like at the construction site to lay it on the seabed construction site. However, asphalt mats are relatively heavy, and there is a problem in that handling operations such as transporting a wide and long sheet-like material on land and lifting during loading and unloading are troublesome. Also,
Even when laying asphalt mats on the sea floor, it is necessary for diving workers to perform positioning of asphalt mats, etc., and when laying asphalt mats over a large area, the construction period will be longer. ,
There are many problems in working efficiency.

[0005] Therefore, instead of asphalt mating, for example, as shown in Japanese Patent Application Laid-Open No. 5-79039, asphalt is flowed directly onto a rubble foundation to form an asphalt layer. It is considered. In the conventional example, in particular, asphalt is poured into the slope of the rubble foundation, and is configured as a device for constructing a layer of asphalt having a predetermined thickness, and an opening / closing lid member is provided at a lower portion of a bucket device for storing asphalt. It is arranged so that the work of dropping asphalt in the seabed construction area can be easily performed. Then, the work of covering the surface of the rubble foundation with asphalt over a wide area and strengthening the support base of the structure can be continuously and easily performed. However, when using asphalt construction equipment as described above,
It is often difficult to apply asphalt of uniform thickness on flat ground. In other words, a plurality of bucket devices are provided in the placing device in a state of being arranged vertically and horizontally, the opening / closing lid provided in each bucket device is opened at a time, the asphalt accommodated therein flows down, and then the placing device is pulled up. Asphalt flows to the surroundings, and a problem arises in that the construction thickness of the asphalt at a required portion cannot be kept constant.

In order to solve the above problems,
For example, for an area where asphalt is to be constructed, a partition member is arranged in accordance with the amount of asphalt to be accommodated in the bucket device, and asphalt dropped from the bucket device is provided with a means for constructing a uniform thickness inside the section. It can also be used. In addition, when the above-described partitioning means is used, for example, if a long and narrow block member made of asphalt is used, the asphalt constructed is integrated with the partitioning member, and asphalt having a predetermined thickness is formed on the seabed ground. Can be formed. However, when the asphalt is dropped from the bucket device when using the partition member, the asphalt having fluidity may climb over the partition member, and the thickness of the asphalt inside the partition may be maintained. There are things you can't do. Therefore, if the partition member is formed to be higher than the construction thickness, irregularities will be generated on the asphalt layer, and when the structure is mounted, there is a problem that stability is not good.

[0007]

An object of the present invention is to solve the above-mentioned problems in asphalt construction, and to provide a casting apparatus in which a form member is integrally provided around a bucket apparatus for storing asphalt. After the asphalt is dropped from the bucket device, the asphalt is dropped at a construction site for a predetermined period of time, and the asphalt is removed from the flowability. Providing a method to be applied to the thickness,
It is an object of the present invention to provide a construction method capable of preventing sliding of an upper structure and preventing water between the upper structure and a foundation.

[0008]

SUMMARY OF THE INVENTION The present invention relates to an apparatus for constructing an asphalt layer as a foundation of a structure when constructing the structure on the seabed. In the present invention, a bucket device is arranged at the center of the frame of the casting device, and the melting device is accommodated in the bucket device. A frame member for supporting the form member is arranged around the frame body, and an apparatus for setting an asphalt driving range is configured. Further, in the present invention, the form member provided in the casting device is provided so as to be vertically movable with respect to the support member, and the height of the form member can be determined in accordance with asphalt construction conditions. Can be configured.

Further, in the method for placing asphalt according to the present invention, a casting device in which a bucket device and a form member are integrally provided is used, and the bucket device is positioned on the seabed at a construction site. The asphalt is dropped, the casting device is not moved for a predetermined time in a state where the asphalt layer of a certain thickness is constructed inside the section defined by the form member, and the asphalt is poured in a state where the fluidity of the asphalt is reduced. Means for moving the device can be used. Furthermore, in the present invention, when performing asphalt construction in a predetermined range using a casting device, when newly constructing a portion adjacent to the section already constructed, a formwork member corresponding to the already constructed asphalt, It is possible to use a means for holding a section to be newly constructed with the asphalt which is held at the position to be raised and which is newly constructed with other form members and asphalt already constructed.

[0010]

As described above, according to the casting apparatus of the present invention, a formwork member having a thickness higher than the asphalt construction thickness is arranged around the bucket apparatus, and the asphalt dropped from the bucket apparatus is subjected to the flowability. The construction thickness of the asphalt in the interior set by the frame can be maintained by preventing the material from flowing over the form member to the surroundings. In addition, the mold member may be subjected to a process for preventing the asphalt from adhering to the inner surface in contact with the asphalt so that the asphalt does not adhere to the iron plate. Furthermore, when using the construction method of the present invention, for the construction portion partitioned by the formwork member,
After dropping asphalt from the bucket device, in a state where the asphalt is cooled by seawater and fluidity is reduced,
By using a means to raise the casting device,
The construction thickness of asphalt in a required section can be secured. Then, by using the method as described above, asphalt construction can be performed with a constant thickness over a wide range, and no unevenness or the like is formed at a joint portion of each construction section, and a flat structure for the structure is formed. The support base can be easily constructed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The asphalt construction apparatus of the present invention will be described with reference to the illustrated example. As shown in FIGS. 1 and 2, in the casting device 10 of the present invention, form members 15, 16 are provided around a frame 11 for setting an asphalt application range.
Are arranged, and a bucket device 20 is provided at the center of the frame. In the frame 11, legs 14, 14a,... Are provided below the upper frame 12 to constitute means for supporting the casting device.
a are provided on the lower side, and the frame member 1 is provided with respect to the side frame.
Attach 5, 16 ... Further, as shown in FIG. 2, the upper frame 12 is formed by combining beam members in the vertical and horizontal directions, and a portion for supporting the form member is provided at the center thereof. Then, the upper frame 12 and the upper portion of the bucket device 20 are connected by an oblique beam member, a lifting member 19 is provided on the upper portion of the bucket device, and the driving device 10 is lifted and moved using the hook 9 of the crane. It is configured to obtain.

A bucket device 20 provided above the center of the upper frame 12 of the casting device 10
An opening / closing lid 21 is provided at the lower part via a hinge 22 so as to be opened and closed, and the opening / closing lid 21 is configured to be operated by opening / closing means (not shown). And the bucket device 2
The asphalt is stored at 0, transported to the asphalt construction position, the casting device is submerged in the sea, positioned at the construction position, and the opening and closing cover 21 is opened so that the asphalt can be dropped. Further, in the device of the present invention, the form members 15, 16,...
Are formed to be thicker than the thickness at which the asphalt is constructed, and when the asphalt having fluidity is dropped from the bucket device 20, the asphalt flows over the form member 15 due to the flowing force of the asphalt and scatters around. To prevent that. Further, a surface treatment is performed on the inner surfaces of the mold members 15, 16... In contact with asphalt so as to prevent asphalt from adhering. For example, a resin material such as Teflon is coated, or asphalt adheres. It is constituted by applying a paint or the like having a property not to be applied.

When asphalt is installed on the seabed using the casting apparatus 10 having the structure shown in FIGS. 1 and 2, the operation is performed as shown in FIG. In the example shown in FIG. 3, a rubble foundation 3 is provided to a predetermined thickness on the submarine ground 2 in the same manner as in the case of the construction of the conventional submarine structure, and a predetermined thickness is provided on the rubble foundation 3. Apply a layer 25 of asphalt with a thickness. At that time, the driving device 10
When the asphalt is dropped by opening the open / close lids 21 and 21a of the bucket device 20, the asphalt flows to a position partitioned by the formwork member around the casting device, and the divided area It solidifies in a flat state at a predetermined thickness. Also, when the asphalt comes into contact with the form member, the form member made of metal and having a high thermal conductivity is cooled by seawater, so that the portion around the asphalt is rapidly cooled. Therefore, when performing asphalt construction using a casting device, it is possible to remove the formwork member in a state where the surrounding part of the construction section is solidified and the molten asphalt inside does not leak out. It is not necessary to immerse the casting device in the sea for a long time.

As described above, when asphalt is supplied from the bucket device and a layer of asphalt is constructed to a predetermined thickness on the seabed, part of the asphalt dropped from the bucket device constitutes a rubble foundation. It penetrates between the stones and acts to fix the stones together by asphalt. Therefore, it is necessary to set the amount of asphalt to be stored in the bucket device to an amount obtained by adding in advance the amount that enters between the rubbles, so that the thickness of the asphalt layer can be set to the set thickness.

In the casting apparatus according to the present invention, when the frame members 15, 16... Arranged around the frame body 11 are fixed to the side frames 13,. If it occurs, or if it is installed next to a section that has already been installed, the problem of tilting the casting device occurs. Therefore, in the casting device of the present invention, as shown in FIG. 4, the side frames 13, 13a.
The form members 15, 16,... Can be provided to be vertically movable, respectively, so as to correspond to the ground of the construction portion. For example, in the form member 16 provided on the side frame 13a of FIG. 4, the form member 16 is attached to the side frame 13a using the fixing screw 18, and the height of the projecting portion below the form member is adjusted. In this state, asphalt can be constructed in the sea. In the example shown in the form member 15 of FIG. 4, a guide pin 17 is provided for the side frame 13, and the pin 1 is provided in a guide hole provided in the form member 15.
7 is engaged, the lower surface of the form member 15 is positioned in a state of being engaged with the unevenness on the seabed. In addition, when the asphalt mat layer 4 has already been cast, the formwork is positioned according to its height so that the end of the asphalt layer can be partitioned.

When asphalt is constructed on the flat ground on the sea floor using the casting apparatus constructed as described above, as shown in FIG. Construction is performed sequentially, such as 31, 33, 35. After that, the already constructed area 31,
When asphalt is applied to the area 32 between 33, the corresponding form member is hooked to the end of the already applied portion, and the setting device is inclined,
The problem arises that the thickness of the asphalt layer cannot be kept constant. Therefore, in the present invention, as shown in FIG. 4, means for vertically moving the form member is provided, and the form member is positioned in accordance with the height of the portion where the form member is located. Means can be provided to set the height of the formwork member. Then, for example, as shown in FIG. 6, when asphalt is constructed in the area 34 adjacent to the already constructed area 31, the height of the formwork member in the section adjacent to the construction area is set. The form member can be positioned according to the height of the asphalt layer already applied. Also, the form member provided on the setting device is held in a state of being slid with respect to the side frame, and the form member placed on the asphalt slides on the side frame, and the setting device is lowered and positioned. Means can be used.

When the asphalt layer is cast flat on the seabed using the casting apparatus constructed as described above, asphalt mixing is applied to the barge 5 as shown in FIGS. A working device on which the device 6 and the crane 8 are mounted is used. The asphalt mixture prepared on land is temporarily stored in the asphalt mixing device 6 provided on the barge 5, and is transferred to the bucket device of the casting device 10 using the chute 7 or the like, and the asphalt is stored. The driven casting device is suspended by the crane 8 and transported to the construction position of the submarine ground 2. Then, the casting apparatus is positioned at the construction position, the asphalt is dropped, and a layer of asphalt is cast at a predetermined thickness in an area defined by the formwork member, whereby a structure can be constructed. As described above, the crane is used to move the setting device, and the area required for installing the structure on the seabed is provided with a predetermined area as shown in FIG. It is possible to use a construction method in which asphalt is cast in the section of the bridge to construct a support base.

In the embodiment of the present invention, the shape of the driving device for asphalt, the position of the bucket device, and the formwork which is vertically movable with respect to the frame of the driving device. The support structure and the like of the members can be arbitrarily configured according to the state of the construction area. Further, the structure of the opening / closing lid provided in the bucket device, the components used for opening / closing the opening / closing lid, and the like can be arbitrarily configured in the same manner as a conventional device such as a bucket device used for handling asphalt. Furthermore, when asphalt is constructed using the apparatus of the present invention, asphalt sections can be constructed sequentially in the construction area by using a plurality of placing apparatuses, and asphalt can be constructed over a wide area. When installing, it is possible to improve the efficiency of construction and shorten the construction period.

[0019]

Since the casting apparatus of the present invention is constructed as described above, a form member having a thickness greater than the asphalt construction thickness is arranged around the bucket apparatus, and is dropped from the bucket apparatus. It is possible to prevent the asphalt from flowing over the form member and flowing out to the surroundings due to its fluidity, and to maintain the construction thickness of the asphalt inside the frame set by the frame. Further, it is possible to prevent the upper structure from sliding, and to provide water shielding between the upper structure and the foundation. In addition, when asphalt is installed in the interior defined by the formwork member, the portion of the molten asphalt in contact with the formwork member is rapidly cooled by seawater, so the casting device is removed from the work position. The time required for the construction can be shortened, and the construction efficiency of the construction can be improved. Furthermore, when the construction method of the present invention is used, after the asphalt is dropped from the bucket device to the construction portion partitioned by the frame member, the asphalt is cooled by seawater and the fluidity is reduced. By using means for raising the casting device, it is possible to secure the construction thickness of asphalt in a required section. Then, by using the above-described method, asphalt can be applied in a wide range with a constant thickness, and a support base for a structure can be easily constructed. Therefore, as compared with the conventional construction method using asphalt mats, the construction work of the base supporting the structure can be easily performed, and the work process can be simplified.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of a casting device according to the present invention.

FIG. 2 is a plan view of the casting device.

FIG. 3 is an explanatory diagram showing a state in which asphalt is constructed using the casting device of the present invention.

FIG. 4 is an explanatory view of an example in which a mold member is movably provided.

FIG. 5 is an explanatory view of a construction state of asphalt.

FIG. 6 is an explanatory diagram of splicing of asphalt.

FIG. 7 is an explanatory diagram of a device for supplying asphalt to a casting device.

FIG. 8 is an explanatory diagram of a state in which asphalt is constructed using a barge.

FIG. 9 is an explanatory diagram of a general example of construction of an underwater structure.

[Explanation of symbols]

1 structure, 2 submarine ground, 3 rubble foundation,
4 asphalt mat, 5 barges, 10 casting equipment, 11 frame, 12 upper frame, 1
3 Side frame, 15 Form member, 20 Bucket device, 21 Opening / closing lid, 25 Asphalt, 3
0 Construction area.

Claims (4)

(57) [Claims] 1. An apparatus for constructing a structure of asphalt as a foundation of the structure when constructing a structure on the seabed ground, wherein the construction device is provided with a bucket device at a central portion of a frame of a casting device. A container for holding the molten asphalt in the bucket device, an openable / closable lid provided at the lower part of the bucket device so as to be openable and closable, and a frame member for supporting a form member disposed around the frame body; An asphalt casting device characterized by setting a range. 2. A configuration in which a form member provided in the casting device is provided so as to be vertically movable with respect to a support member, and a height of the form member can be determined in accordance with asphalt construction conditions. The asphalt driving device according to claim 1, wherein: 3. An asphalt is dropped from a bucket device using a casting device in which a bucket device and a form member are integrally provided, and the casting device is positioned on the sea floor at a construction site, and partitioned by the form member. Characterized in that the casting device is kept at the construction position for a predetermined time in a state where a layer of asphalt having a constant thickness is built in the inside, and the casting device is moved in a state where the asphalt has no fluidity. Construction method of asphalt. 4. When performing asphalt construction within a predetermined range using a casting device, when newly constructing a part adjacent to a section already constructed, a form member corresponding to the already constructed asphalt is raised. The asphalt construction method according to claim 3, wherein the asphalt section to be newly constructed is constituted by holding at a position to be made and using another form member and the asphalt already constructed.