JPS58174079A - Replacing method for structural member of ship's hull - Google Patents

Abstract

PURPOSE:To safely work without providing a scaffold or the like, by a method wherein an inner structural member of the ship's hull is cut out to the outside as a hull part integral with an outer structural member provided in proximity thereto, and after replacing or repairing the inner structural member, the entire body of the hull part is returned to its original position and fitted in situ. CONSTITUTION:Girder members 1 provided as inner structural members of the ship's hull which have to be replaced and an upper deck 2 provided as the outer structural member in proximity to the girder members 1 are outwardly cut out as an integral hull part (block) together with longitudinal frames 3, and are fed out by a crane. The hull part is tentatively placed on land in a reversed condition, and the girder members 1 are replaced. After replacement is completed, the hull part is returned to its original position in the ship's hull, and is fitted in situ. Accordingly, it is unnecessitated to provide any scaffold and to work at high places, and the inner structural member of the ship's hull can be replaced safely and efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for repairing a ship, and particularly to a method for replacing internal structural members of a ship's hull.

Conventionally, in the repair work of the hull, especially Figure 1 (longitudinal cross-sectional view)
In a tank with a hull like that shown in Figure 2 (cross-sectional view), the girders 1, ribs 3, and bulkheads 7, 8 on the left and right sides of the top of the tank
A large number of partial replacement works such as these are occurring.

These girder materials 1. When replacing and repairing the rib cage 3 and bulkheads 7, 8, etc., it is necessary to make an opening of the required size in the deck 2 in order to cut out and transport the defective parts and to bring in new parts to be replaced. The removed defective parts are moved to the above-mentioned opening using an air winch or chain block, and then carried out of the ship through the opening using an air winch or a crane.

Then, the new replacement member is suspended from the opening using an air winch and a chain block, and moved to the switching location and installed.

With such conventional construction methods, there are many difficulties in cutting out defective parts and installing new parts on site, and additional work such as constructing scaffolding is required for these works and for carrying in and out of each part. Furthermore, the above-mentioned construction and incidental works are carried out at high places, making them extremely dangerous.

The present invention attempts to solve these problems, and aims to provide a construction method that enables efficient and safe replacement and repair of hull structural members.

Therefore, in the construction method of the present invention, when replacing and repairing the internal structural members of a ship's hull, the internal structural members are cut out to the outside as a hull part that is integrated with the external structural members in the vicinity, and then the After replacing and repairing the internal structural materials,
It is characterized in that the hull portion is returned to its original position in the hull and attached.

Hereinafter, the hull structural material replacement method as an embodiment of the present invention will be explained with reference to the drawings. Figures 3 to 6 show a hull tank repaired by the method of the present invention; Longitudinal cross-sectional view.

Figure 4 is a cross-sectional view thereof, Figure 5 is a perspective view showing the state in which the hull structural member is being removed, and Figure 6 □ is a reversed temporary position of the removed hull structural member. FIG.

In Figures 3 to 6, code 1 indicates the girder material that requires replacement;
2 is an upper deck, 3 is a longitudinal rib, 4 is a suspension piece, 5 is a suspension wire, 6 is an opening after cutting out the hull structural material, 7 is a longitudinal bulkhead, and 8 is a transverse bulkhead.

In the construction method of the present invention, first, the girder 1 as an internal structural member that needs to be replaced and the upper deck 2 as an external structural member in the vicinity are integrated into a hull part (block) together with the longitudinal ribs 3.
It is cut out as a piece of paper and transported by a crane (not shown) as shown in Fig. 5.

Then, after this hull part is temporarily placed on the ground in an inverted state as shown in FIG. 6, for example, the replacement work for the girder 1 can be carried out efficiently and safely.

The hull section is then returned to its original position on the hull and installed.

In the above-described embodiment, the external structural member is the upper deck 2, but the construction method of the present invention can also be applied to the outer plate of the hull.

The method of the present invention is also applied to internal structural members that require replacement and repair, such as the ribs 2 and partition walls 7 and 8, in addition to the girder 1.

As detailed above, according to the hull structural material replacement method of the present invention, it is not necessary to erect scaffolding, and the internal structural material of the hull can be replaced safely and efficiently without requiring work at heights. This makes it possible to do the following.

[Brief explanation of drawings]

Figures 1 and 2 show the hull structure to which the conventional hull structural material replacement method is applied. Figure 1 is its longitudinal sectional view, Figure 2 is its cross sectional view, and Figure 3 4 is a cross-sectional view thereof, FIG. 5 is a perspective view showing the state in which the hull structural member is being removed, and FIG. 6 is an inversion of the removed hull structural member. FIG. 3 is a perspective view showing a temporarily placed state. 1. Girder material, 2. Upper deck, 3. Longitudinal rib. 4e・Hanging piece, 5・Hanging wire, 6φ・Opening,
7. Longitudinal bulkhead, 8. Transverse bulkhead. Sub-Agent Patent Attorney Yoshihiko Iinuma Figure 1 Figure 2

Claims (1)

[Claims] When replacing and repairing the internal structural members of the hull, the internal structural members are cut out to the outside as a part of the hull that is integrated with the external structural members in the vicinity, and then the internal structural members are replaced and repaired in this hull part. A method for replacing structural materials of a ship's hull, which is characterized in that after applying the same material, the same part of the hull is returned to its original position on the ship's hull and reattached.