JPS59185228A - Joining of curved concrete material - Google Patents

Abstract

PURPOSE:To easily and exactly join an internal structural part and a curved material by fixing at least one wall with the end of the internal structural part by thrusting metal bars through a sheath. CONSTITUTION:In joining the end of two curved concrete materials 8 with both sides of the ends of internal concrete structural parts 5 and 6, a concrete wall 9 is formed in advance on the ends of the curved materials 8 for surrounding, and the walls 9 of the two curved materials 8 are fixed by thrusting metal bars 15 through sheaths 10. At least one wall 9 and the ends of the internal structural parts 5 and 6 are fixed together by thrusting metal bars 18 through a sheath (not illustrated). The internal structural parts 5 and 6 can thus be joined with the curved materials 8 easily and exactly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for joining curved concrete bodies, and more particularly to a method for joining the ends of two curved concrete bodies on both sides of the ends of a concrete material.

Recently, water sea structures using concrete caissons have been developed for oil field development and oil extraction in water seas. Concrete water-sea structures are lower in cost, have better corrosion resistance, and are more durable than steel structures, but they are heavier and therefore have greater light load shedding. Aquatic structures, whether they are floating or bottom-mounted, are often floated on the sea surface and towed from the dock at the manufacturing site to the installation site. Considering the draw-in to the area, it is necessary to reduce the amount of light cargo intake to a certain extent. However, in the case of concrete water-sea structures, the weight is large and the light load is large, so
It may not be possible to pull it out of the dock and into the installation location. On the other hand, ice structures made of steel are lighter and less prone to water leakage than those made of concrete, but are higher in cost and inferior in corrosion resistance and durability.

Therefore, the present applicant has solved the above-mentioned problems, and aims to simultaneously satisfy the following conditions: low cost, excellent corrosion resistance, durability, and the ability to reduce water droplets during light loads. The lower part is made of concrete, the upper part is made of steel, and the bottom plate of the lower part is constructed by combining multiple curved bodies each having an upwardly curved substantially cylindrical or substantially spherical surface. We proposed an ice-ocean structure characterized by: Many of these ice-water structures are large, and it is difficult to mold the concrete bottom plate into one piece, so the bottom plate is constructed by joining multiple curved concrete bodies that have been formed separately. However, joining curved concrete bodies is generally difficult and fraught with problems.

An object of the present invention is to provide a rational joining method that can easily and reliably join the ends of two curved concrete bodies to both ends of a concrete material.

In the joining method according to the present invention, when joining the ends of two concrete curved bodies on both sides of the ends of concrete materials, a concrete peripheral wall is formed at the end of the curved bodies to surround the two curved bodies. The peripheral walls of the concrete are fixed by passing a metal rod through them, and at least one of the peripheral walls and the end of the concrete material is fixed by passing a metal rod through them.

According to this invention, by simply fixing the circumferential walls of two curved bodies by passing a metal rod through them, and fixing at least one of the circumferential walls and the end of the concrete material by passing a metal rod through them, Concrete material and curved body can be easily and reliably joined. Therefore, even when constructing a structure that combines a plurality of concrete curved bodies, it is easy to make the plurality of curved bodies and concrete material separately and join them using the method of the present invention. You can build structures on.

The present invention will be described in detail below with reference to the drawings.

Figures 1 and 2 show a rectangular parallelepiped bottom-mounted aquatic structure.
It consists of a concrete lower structure (2) that is placed on the ground (1) and receives water pressure and water pressure, and a steel upper structure (3) that is bonded thereon.

The vertical outer plate (4) and vertical internal structural members (5') (6) of the lower structure (2) (hereinafter referred to as internal structural members and bottom plate (7)
) is constructed by joining together a plurality of concrete curved bodies (8) each having an upwardly curved cylindrical groove, as shown in detail in FIG. 3 (9). The curved body (8) is made of concrete and has a shape obtained by cutting the upper part of a horizontal cylinder by two vertical planes perpendicular to the axis and two symmetrical vertical planes on both sides of the axis. The shape is square. Both end faces of the curved surface body (8) in the circumferential direction are linear vertical planes, and both end faces in the axial direction are upwardly curved arcuate vertical planes. Curved surface (
At the end of 8) there is a vertical concrete wall surrounding it (9).
) is formed, and a plurality of horizontal sheaths (10) are driven into the peripheral wall (9) passing through it. Peripheral wall (9
) is relatively wide, and its upper and lower surfaces are horizontal. A recess (1
1) (12> is formed, and although not shown in the figure, the peripheral wall (9) has a recess (12) from the outer surface 9 recess (11) to the upper surface recess (12).
) Multiple sheaths that can be handled are driven diagonally. In addition, on the outer surface of some of the peripheral walls (9), there are a plurality of steel members (13), some of which protrude slightly outward, corresponding to the recesses (11).
is embedded. On the other hand, the inner structure material (
5) Outward protrusions (14) with a triangular cross section are formed on both sides of the upper end of (6), and the inner structure member (-5>) is formed horizontally.
(6) The width of the lower surface is wider than the other parts. A convex portion (17) corresponding to the recess (12) on the upper surface of the peripheral wall (9) of the curved body (8) is formed on the lower surface of one of the protruding portions (14). Two curved bodies (8) are arranged side by side so that the peripheral walls (9) are in contact with each other, and one of the peripheral walls (
f [, 4 (13) of 9) is the recess (1
I am addicted to 1). Multiple PC steel bars (metal bars) (15
) is passed through the sheath (10) of these two peripheral walls (9), and nuts (16) are screwed onto both ends thereof.
is held in tension by As a result, the peripheral walls (9) of the two curved bodies (8) are firmly joined together. In addition, the lower ends of the internal structural members (5) and (6) are placed on the upper surface of the peripheral wall (9) of the two curved bodies (8) joined in this way, and the convex portions of the internal structural members (5) and (6) are placed. The part (17) and the recess (12) of the peripheral wall (9) fit into each other.

A PC steel rod (metal rod) is inserted diagonally through the recess (11) on the outer surface of one peripheral wall (9) and into the protrusion (14) of the sheath and inner structural members (5) and (6). (18) and nuts (19) screwed into both ends thereof, the peripheral wall (9) and the internal structural members (5) and (6) are firmly joined.

Note that the inside of the recess (11) on the outer surface of the peripheral wall (9) is filled with concrete (20) after joining.

The lower structure (2) is constructed, for example, as follows.

First, a plurality of concrete curved bodies (8) are molded separately, and a plurality of sheaths (1) are placed inside the peripheral wall (9) during molding.
0). At the same time, lower structure 2)
other parts, namely the outer plate (4) and the inner structural member (5) (
Divide 6) into blocks of appropriate size and mold.

Then, the bottom plate (7) of the lower structure (2) is assembled by joining the plurality of curved bodies (8) together. In this case, first the PC steel rod (18) is attached to the peripheral wall (
9> The sheath is passed through the recess (11) on the outer surface and projects obliquely upward, and the other curved body (
These peripheral walls (9) so that the steel members (13) of 8) fit into them.
Bring the PC steel rods (15) into contact with these peripheral walls (9
) through the sheath (10), and then tighten the nuts (
16) to fix the peripheral wall (9) together, and finally the recess (11) of the peripheral wall (9) is filled with concrete (20). Once the bottom plate (7) of the lower structure (2) is assembled in this way, the blocks that are to be placed on top of the other parts of the lower structure (2) and joined together are assembled. Assemble the entire lower structure (2).

For example, the lower end of the inner structural member (5) is connected to two
When joining the two curved bodies (8) on the peripheral walls (9), first place the inner structural material (5) on the upper surface of these peripheral walls (9) and place the convex part (17) on the peripheral wall (9). Fit it into the recess (12). At this time, the protrusion (14) of the inner structural member (5) has
A PC steel rod (18
) is passed through, a PC steel rod (18) is inserted into this hole, the inner structure material (5) is placed on the top surface of the peripheral wall (9), and then the hole is filled with concrete.

Finally, the nuts (19) of the PC steel rods (18) are tightened to fix the inner structural member (5) to the peripheral wall (9). The same applies to Hakuunouchi structural materials (6). In addition, the lower structure (
The lower end of the outer plate (4) of 2) is joined to the peripheral wall (9) of the curved body (8) around the bottom plate (7) by substantially the same method as above or any other suitable method.

The bottom plate (7) of the lower structure (2) may be constructed by joining a plurality of concrete curved bodies having upwardly curved spherical or other curved surfaces.

The above bonding method has the following advantages.

That is, the PC steel rods (15) are inserted through the peripheral walls (9) of the two curved bodies (8) and fixed with nuts (16), and the peripheral walls (9) and the internal structural members ( 5)
By simply inserting the PC steel rod (18) into the protrusion (14) of (6) and fixing them with the nut (19), the inner structural members (5> (6) and curved body (8) can be easily assembled. Therefore, the plurality of curved bodies (8) constituting the bottom plate (7), the outer plate (4), and the inner structural member (5) can be joined together securely and reliably.
Create the blocks that make up <6) separately,
By joining these parts by the above method, the lower structure (2) can be easily constructed.

Top plate (30) of upper structure (3), vertical outer plate (31)
and the vertical internal structural members (32) are all made of mild steel.

Then, the entire lower end of the outer plate (31) of the upper structure (3) and the lower end of the inner structural member (32) are connected to the upper end of the outer plate (4) of the lower structure (2) by appropriate means. and is joined to the upper end of the internal structural member (5).

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway plan view of a bottom-mounted underwater structure, FIG. 2 is a sectional view taken along line II-I in FIG. 1, and FIG. It is an enlarged view of the main part of the figure. (5,) ('6)... Concrete internal structural members,
(8) Concrete curved body, (9) Peripheral wall, (15) (18) PC steel rod (metal rod). Continued from page 1 by 4 other people 0 Author: Masakatsu Matsuishi Hitachi Zosen Corporation, 1-6-14 Edobori, Nishi-ku, Osaka 0 Author: Tsutsumi Iwata Hitachi, Ltd., 1-6-14 Edobori, Nishi-ku, Osaka Within Shipbuilding Co., Ltd.

Claims (1)

[Claims] When joining the ends of two concrete curved bodies on both sides of the concrete material, a concrete peripheral wall surrounding the ends of the curved bodies is formed, and metal rods are used to connect the peripheral walls of the two curved bodies together. A method for joining a curved surface made of concrete, characterized by fixing the concrete material by passing it through it, and also fixing it by passing a metal rod through at least one of the peripheral walls and the end of the concrete material.