JPS61216921A - Formation of panel point under water - Google Patents

Abstract

PURPOSE:To easily form a panel point under water by a method in which a half-split annular supporter is temporarily clamped to a strut driven under water, an outer short tube is put through a sealant on the supporter, and cement mortar is packed into the gap between the strut and the short tube. CONSTITUTION:A half-split annular supporter 3 is temporarily clamped to the outer periphery of a strut 1, and an outer short tube 5 is placed through a sealant 4 on the supporter 3. Cement mortar is packed into the gap between the strut 1 and the short tube 5 to fix the tube 5 to the strut 1.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical field to which the invention pertains) The present invention relates to a technique for providing underwater points on supports of underwater structures.

(Problems to be solved by the invention and its features) When constructing underwater structures such as sea berths and dolphins, it is possible to fix an extrapolated short pipe to the underwater part of a support (for example, a steel pipe pile) cast in the water using cement mortar. Forming a point (fulcrum of a place material) is conventionally known (see, for example, Japanese Patent Laid-Open No. 54-44301).

In this conventional example, the short outer tube is suspended with a wire rope and held at a predetermined position in the middle of the support, and in this state, the upper and lower ends of the gap between the support and the short outer tube are After sealing by supplying pressurized air to a rubber tube that has been set in advance around the circumference, cement mortar is injected and filled into the gap, which is excellent in that it can reliably form a strong point. However, there are difficulties in constructability.

An object of the present invention is to provide a new method that can form an underwater spot more easily and economically than the conventional method described above, and its structural features are that Temporarily fix a half-ring-shaped support in the appropriate position of the pillar, place the short outer tube on top of it with a sealant, and in this state, apply cement mortar in the gap between the support and the short outer tube. The point is to fill it and fix the short outer tube to the support. Note that it is preferable to use a so-called expandable mortar mixed with an expanding agent as the cement mortar for filling.

(Explanation with drawings) Fig. 1 is an overall view of an underwater structure in which a grid point is formed according to the present invention, and in the figure, 1 is a column, 2 is a place material, 3 is a support body, and 4 is a seal material. , 5 is an extrapolation short tube.

In the present invention, first, the support body 3 is temporarily fixed to a predetermined location of the support column 1 which has been cast in water in advance, but this support body 3 is formed into a half ring shape so that it can be easily attached to the column 1. has been done.

The support body 3 shown in FIG. 2 and FIG.
, and the other side is fastened with bolt 9, but the other side may be fastened by clamping it with a drive fitting instead of bolting, or alternatively, the - side is not hinged and the other side is fastened with bolts 9. Similarly, it may be secured with bolts or the like.

Temporary fixing of the support 3 can be ensured by tightening and fixing the support 3, which has an inner diameter slightly smaller than the outside diameter of the support 1, around the outer periphery of the support 1. However, the present invention is not limited to this. In the case of a helical pile, the support 3 with an inner diameter slightly larger than the outside diameter of the pile is extrapolated onto the pile and lowered, and the support 3 is tilted at a predetermined position so that the lip 6 frictionally engages with the outer periphery of the pile and stops. You can do it like this.

If the above-mentioned tightening is fixed, a diver will be used,
Since the time required for temporary fixing work is short, the cost is not very high.

After temporarily fixing the support 3 to the outer periphery of the column 1, the short outer tube 5 is placed on it via the sealing material 4. Alternatively, the short outer tube 5 may be placed on the support 3 prior to placement of the short outer tube 5.

When the short outer tube 5 is placed on the sheet material 4, the sealing material 4 is compressed by its weight and the lower end of the short outer tube 5 is sealed. Cement mortar is injected and filled into the gap, and the short outer tube 5 is fixed to the support column 1. Note that, at this time, even if the upper part of the gap is open, there is no problem.

(Effects of the Invention) Since the method of the present invention forms underwater grid points as described above, it is much easier to construct than the conventional method, and construction costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is an overall front view of an underwater structure in which points are formed according to the present invention, FIG. 2 is a diagram of the point section before filling with cement mortar, and FIG. 3 is a plan view of the support. In the figure, 1... Support column, 3... Support body, 4... Seal material, 5... External short tube, . . .

Claims (1)

[Claims] Temporarily fix a half-split annular support at the appropriate location of the column cast in the water, place the short outer tube on top of it with a sealant, and in this state insert the support into the gap between the column and the short outer tube. A method for forming an underwater case point characterized by filling cement mortar and fixing an extrapolated short pipe to a support.