JPS6355582B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an underwater concrete construction method for breakwaters and the like.

Conventionally, in the underwater concrete construction method, a formwork for the underwater part is prepared in advance on land, the formwork is lowered into the water by a crane, and then concrete is poured into the formwork. However, when the formwork is submerged in water, it is susceptible to the effects of waves, making it difficult to sink and install it in a fixed position on the seabed, and the formwork as a whole is easily damaged by waves.

In order to solve the above-mentioned drawbacks, the present invention has been developed by submerging and fixing formwork columns assembled on land in water, inserting panel formwork between each support column, and pouring concrete after assembling the formwork underwater. It is an underwater concrete construction method that is designed to create concrete structures, and is characterized by being less affected by waves, allowing for free assembly of large formwork, less dangerous work by divers, and easy dismantling of formwork. It is something.

Hereinafter, the structure of the present invention will be explained with reference to the drawings showing examples of the present invention.

Left and right corner supports 2, 2' with vertical grooves 1, 1 on two sides, one side and the back, are erected at appropriate intervals,
A vertical groove 1,
1 are installed at specified intervals, and each front intermediate column 3 and left and right corner columns 2,
2', a desired number of front connecting members 4 are fixed with bolts at appropriate intervals vertically and detachably. The left and right side intermediate struts 3' are erected at specified intervals, and the left and right connecting members 4' are bolted to the outer surfaces of the left and right side intermediate struts 3' and the left and right corner struts 2, 2' at appropriate vertical intervals. and fix it removably with bolts, and spacer retaining members 5 are arranged in series at appropriate intervals vertically on the opposing surfaces of the left and right opposing intermediate supports 3', 3', and are removably fastened with bolts. Each front connecting member 4
In addition, a support frame material 7 with stays 6 removably stretched across the left and right connecting members 4', 4', etc. is assembled, and the back surface of the support support frame material 7 is attached to the front surface of a concrete body 8 constructed on the coast or the like. While fitting, the column frame material 7 is lowered and fixed on the seabed, and the left and right corner columns 2, 2', the front intermediate column 3, and the side intermediate column 3' are opposed to each other at the front and both sides of the column frame material 7. Vertical grooves 1, 1 on the surface
After inserting any number of formwork panels 9 into the interior and removably locking them to each support with bolts, the inside is filled with concrete and hardened. After the concrete has hardened, the formwork panels 9 are removed and the support frame is assembled. It is made to move the material 7.

Next, the effects of the present invention will be explained with reference to embodiment figures.

In the underwater concrete construction method of the present invention, the support frame material 7 is assembled on land and then fitted and fixed to the front surface of the concrete body 8 while being suspended by a crane or the like. It is not affected by waves and can be easily fixed without shaking the support, and because it does not have formwork panels, it is lightweight considering its shape and has a low risk of danger. Then, the fitting protrusions at both ends of the formwork panel 9 are fitted into the opposing vertical grooves 1, 1 of the pillars fixed on the seabed from the upper end, and stacked in any number of layers while sliding, and then attached to each pillar. The fitted bolts are used to lock the fitting protrusions of the formwork panel 9, and concrete is poured inside. Since the lateral pressure of the concrete can be withstood by the formwork panel 9 itself, the number of spacing members 5 can be reduced, and since the insertion of the formwork panel 9 and the concrete pouring work can be done in parallel, there is no need to create a pouring joint. , because the influence of waves is small, the construction period can be greatly shortened, and after the concrete has hardened, the formwork panel 9 is removed, and the side intermediate supports 3', 3' and the spacing material 5 are removed. After removing the bolts that connected the support frame 7, the support frame material 7 is lifted up by a crane, moved further to the front, and fixed in seawater again, which can be used to save labor in the underwater concrete method, etc. It has many remarkable effects.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the implementation of the method of the present invention, Fig. 2 is a right side view thereof, Fig. 3 is a front view of the formwork panel, Fig. 4 is a plan view thereof, and Fig. 5 is an assembled mold. FIG. 3 is a partially enlarged plan view of the frame. 1... Vertical groove, 2, 2'... Left and right corner supports, 3,
3'... Intermediate support, 4, 4'... Connecting member, 5...
Spacing material, 6... Stay, 7... Support frame material, 8
...Concrete body, 9...Formwork panel.

Claims (1)

[Claims] 1 Left and right corner posts with vertical grooves on two sides, one side and the back, are erected at appropriate intervals, and an arbitrary number of front middle posts with vertical grooves on both sides are placed between the left and right corner posts. The front intermediate pillar and the left and right corner pillars are vertically erected, and the front connecting members are removably connected with bolts at appropriate intervals vertically in front of the front intermediate pillar and the left and right corner pillars, and vertical grooves are formed in the backs of the left and right corner pillars in the front-rear direction. An arbitrary number of side intermediate columns are erected, and left and right connecting members are removably connected with bolts at appropriate intervals vertically on the outer surfaces of the side intermediate columns and left and right corner columns, and each of the left and right opposing sides Assemble a support frame material with interval retaining materials removably attached using bolts at appropriate intervals vertically on the opposing surface of the middle support column, and fit the back side of the support frame material to the front of a concrete body constructed on the coast, etc. Together they sink and settle on the ocean floor,
An underwater concrete construction method characterized by inserting formwork panels into vertical grooves facing each other at intervals between the columns of the support frame material and locking them with bolts, and then filling and hardening concrete inside.