JPS6332094A - Sedimentation and embedding box and its production - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to the structure of an immersed burial box installed across a waterway, and its manufacturing method.

(Conventional technology) Conventional immersed containers have a reinforced concrete structure in their entire cross section, and when they are manufactured, the lower waterproof steel plates and the end steel shells are assembled in sequence at the production yard, and then the reinforcement of the lower deck is laid out and shaped. After assembling the frame and pouring concrete, assembling the outer panels of the side walls, arranging reinforcement for the same side walls, assembling the formwork, and pouring concrete, and then arranging reinforcement, assembling the formwork, and pouring concrete for the intermediate walls. , a dry dock method in which the formwork for the upper slab is supported on the shoring installed on the lower slab, reinforcement is placed for the upper slab, concrete is poured, and the immersed box is completed and then launched onto the sea. Then, the end steel shells are assembled in the fabrication yard, and then the general steel shells and water-stop walls are assembled in sequence.The assembled structure thus constructed is launched and fixed in the mooring yard, and then the lower deck and side walls are assembled in sequence. , conduct reinforcement, formwork assembly, and concrete pouring for the intermediate wall, support the upper slab formwork with the shoring placed on the lower slab, reinforcing the same floor slab, assemble the formwork, There is a steel shell method in which the immersed box is completed by pouring concrete IJ and then launched into the sea.

(Problems to be Solved by the Invention) In the above-mentioned conventional torpedo-dock method, since the freeboard of a floating burial case is small, the dry dock is limited, and the large dead weight of the immersion box formed by the dry dock is limited. must support
Furthermore, since water is injected into the dock to float the buried ship and tow it, the fabrication of a large amount of sunken ships requires an enlarged tow truck and occupies the dry dock for a long period of time.

In addition, in the conventional steel shell method, in the case of an immersed box with a large rectangular cross section, the weight of the steel shell increases significantly, which increases manufacturing costs. Problems such as poor workability such as reinforcing reinforcement and concrete IJ casting were encountered.

(Means for Solving the Problems) The present invention relates to a structure of an immersed burial box and a method for manufacturing the same, proposed in order to solve the above-mentioned problems. Upper and lower floor slabs of reinforced concrete structure integrated with the same steel plates, and side walls of steel plate concrete structure consisting of double steel plates placed between the two floor plates and concrete integrated with the same steel plates. It consists of a dock and an intermediate wall.
In a manufacturing yard for ship platforms, etc., the lower waterproof steel plate, the end steel shell, and the side walls and intermediate walls made up of double steel plates are assembled, and after constructing the lower slab of reinforced concrete structure on the lower waterproof copper plate, the upper floor is assembled. A waterproof steel plate on the upper part of the plate and a water-stop wall on the steel shell at the end are installed, and the assembled structure thus constructed is launched into the water and fixed in the mooring yard, and concrete is poured for the side walls and intermediate walls in the mooring yard 1. The above-mentioned problem is solved by constructing an upper concrete floor slab having a reinforced concrete structure on the upper waterproof steel plate.

(Function) In the immersion i according to the present invention, double steel plates are used for the side walls and intermediate walls that connect the upper and lower slabs of a reinforced concrete structure, and the double steel plates are integrated with concrete to form a steel plate concrete structure. The double steel plate functions as a formwork, and in terms of strength, also functions as a concrete reinforcing bar.

In addition, in the production yard 9, the lower waterproof steel plate, the end steel shell, the side walls and intermediate walls made of double steel plates are assembled, and the lower floor slab of reinforced concrete structure is installed on the lower waterproof steel plate. After construction, the upper waterproof steel plate of the upper slab and the water-stop wall of the steel shell at the end were installed, thus reducing the weight compared to when only the lower slab of reinforced concrete structure was completed in production yard 0. Launch a sufficiently small assembled structure. In this case, the structure will naturally have a small amount of water.

Furthermore, in the present invention, the structure is fixed to a mooring yard, and in the same mooring yard, concrete is poured for the side walls and intermediate walls of the remaining structure, and the upper slab of the reinforced concrete structure is constructed on the upper waterproof steel plate.

(Example) The present invention will be described below with reference to the illustrated embodiments.

Figure 1 shows a cross section of the submerged box, and (1) is a lower waterproof steel plate, which is constructed by welding and joining the steel plates to cover the entire lower surface of the submerged box. (2) is the upper waterproof steel plate, and the upper and lower waterproof steel plates (IO2) are connected to the side wall (3) and the middle side wall (4), and the walls (3) and (4) are the upper and lower waterproof steel plates (1) and (2).
It consists of a double steel plate (5) welded to the top and concrete integrated with the double steel plate (5).

As shown in Fig. 3, the double steel plate (5) is connected to the opposing outer plate (6) and a diaphragm (7) as a shape-retaining member that connects the outer plate (6). On the opposite surface of the plate (6), there is a shaped steel material (
8) and reinforcing material (9) are provided, and a dowel α1 is installed to integrate with the concrete.

On the lower waterproof steel plate (1) and the upper waterproof steel plate (2), an upper floor slab αυ and a lower floor slab (13) of reinforced concrete structure, which are integrated with the respective steel plates (1) and (2), are layered. In the figure, α3 is the end steel shell, and I is the water stop wall of the end steel shell.

Next, the method for manufacturing the immersed burial box will be explained with reference to the manufacturing flowchart shown in FIG.

First, lower waterproof steel plates (1) are arranged on the base of a production yard for dry docks and the like and joined by welding to produce the bottom outer plate of the submerged box. Next, located at both longitudinal ends of the submerged burial box,
Assemble the end steel shell α which has the function of connecting adjacent immersed structures, and then assemble the side wall (3) and intermediate wall (4) of double steel plate structure.
At the same time as the blocks are sequentially joined to the assembled bottom skin, the blocks are joined together. After that, the reinforcing bars of the lower deck c12 were placed on the lower steel plate, and the side wall of the double steel plate structure (3)
, concrete is poured around the lower slab including the lower part of the intermediate wall (4), and the bottom of the immersion is completed. Thereafter, the upper waterproof steel plate (2) and the water stop wall α3 of the end steel shell α3 are assembled, and the semi-completed assembled structure at this stage is launched.

In the figure, α9 indicates the stasis of the same assembled structure.

A feature of this method is that the bottom concrete of the temporary lower floor of the submerged box is completed before launching.

After the assembled structure was launched and fixed to the mooring yard 9, the side walls (3) and intermediate walls (4) were poured with concrete, and the upper part was placed on the upper waterproof steel plate (2). The reinforcement for the floor slab αD is arranged, and the concrete for the upper slab αυ is successively poured using mobile shoring to complete the immersed box, which is then towed to the required water area.

(Effects of the Invention) According to the present invention, as described above, in the production yard,
After assembling the lower waterproof copper plate, the end steel shell, and the side walls and intermediate walls made of double copper plates, and constructing the lower floor slab of reinforced concrete structure on the lower waterproof steel plate, the upper waterproof steel plate of the upper floor slab portion is assembled. and a water-stop wall with a steel shell at the end, and the assembled structure constructed in this way is launched. Therefore, only the lower slab of the reinforced concrete structure of the assembled structure is located inside the production yard. It is now in a completed state, and the weight is sufficiently smaller than when completed, the water level at the time of launch is shallow, the water depth at the location where the production yard is installed is significantly reduced, and the basic structure of the production yard can be changed to the same as in the conventional case. Eliminates the need for large structures.

In the present invention, the assembled structure is then fixed to a mooring yard, and in the same mooring yard, concrete is poured for the side walls and intermediate walls of the remaining structure, and the upper slab of the reinforced concrete structure is constructed on the upper waterproof steel plate. Therefore, according to the present invention, the immersed box is manufactured in two places, the manufacturing yard and the mooring yard, so the period of occupation of the manufacturing yard can be shortened, and the capacity of the yard can also be small.

Further, in the immersed box according to the present invention, since a reinforced concrete structure lower deck with a completed cross section can be used, the amount of steel material can be significantly reduced compared to the conventional immersed case where the entire cross section is a steel shell.

Furthermore, according to the present invention, double steel plates are used for the side walls and intermediate walls, and the same double steel plates serve both as formwork and reinforcing bars, eliminating the need for formwork installation and reinforcement work, and improving workability. Improvements will be made and the construction period will be shortened.

Furthermore, in the present invention, the upper deck is constructed using movable shoring using side walls and intermediate walls in a manner similar to construction in a production yard.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of the immersed box according to the present invention, Fig. 2 is a partially cutaway slope view showing its launching condition, Fig. 3 is a slope view of the double steel plate section, and Fig. 4 is Arrow view It/-It/ in Fig. 2
Figure 5 is a production flowchart of immersion i. (1)...Lower waterproof steel plate (2)...Upper waterproof steel plate r3)...Side wall (4)...
Intermediate side wall (5)...Double steel plate αυ...
Upper floor slab α...Lower floor slab αJ...End steel shell I...Water-stop wall Agent Patent attorney Shige Okamoto 2 other people

Claims (2)

[Claims] (1) The upper and lower floor plates of a reinforced concrete structure are integrated with the steel plates layered on the lower and upper steel plates, and the double steel plates placed between the two floor plates are integrated with the same steel plate. An immersed box characterized by comprising side walls and an intermediate wall of a steel plate concrete structure made of concrete and concrete. (2) At a manufacturing yard for dogs, slipways, etc., assemble the lower waterproof steel plate, the end steel shell, and the side walls and intermediate walls made of double steel plates, and construct the lower slab of reinforced concrete structure on the lower waterproof steel plate. After that, the upper waterproof steel plate of the upper deck and the water-stop wall of the end steel shell are installed, and the assembled structure thus constructed is launched and fixed in a mooring yard, and the side walls and intermediate walls are installed in the same mooring yard. 1. A method for producing a submerged box, comprising: placing concrete, and constructing an upper concrete floor plate having a reinforced concrete structure on the upper waterproof steel plate.