JPS6355581B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for adjusting the expansion and contraction of the lower ends of formwork columns used in underwater concrete construction methods for breakwaters and the like so as to conform to the unevenness of the seabed.

Conventionally, in the underwater concrete method, the formwork for the underwater part is made in advance on land, suspended in the water by a crane, and then concrete is poured into the formwork. The formwork supports cannot be adjusted for expansion or contraction, so if there are irregularities on the seabed, it takes a lot of effort for divers to smooth them out, and the formwork supports must be set vertically. It had drawbacks such as requiring a lot of effort.

In order to solve the above-mentioned drawbacks, the present invention makes it possible to expand and contract the lower end of the formwork support, thereby making it possible to easily sink the formwork support vertically to the seabed surface and improve work efficiency. It is characterized by:

Hereinafter, the configuration of the present invention will be explained with reference to embodiment figures.

Left and right corner supports 2, 2' with vertical grooves 1, 1 on two sides, one side and the back, are arranged at appropriate intervals,
A vertical groove 1,
1 are installed at specified intervals, and each of the front intermediate columns 3 and the 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 columns 3' are erected at specified intervals, and left and right connecting members 4 are installed at appropriate vertical intervals on the outer surfaces of the left and right side intermediate columns 3', 3' and the left and right corner columns 2, 2'. ' are removably secured with bolts, and spacing retaining members 5 are connected to the opposing surfaces of the left and right opposing side intermediate columns 3', 3' at appropriate intervals vertically and removably secured with bolts. In the support frame material 7 in which the stays 6 are removably stretched across the front connecting members 4 and the left and right connecting members 4', 4', etc., the left and right corner supports 2, 2' and each intermediate support 3 are tightened. , 3' have a cylindrical shape, and an arbitrary number of pin holes 8 communicating from the front to the back are bored in the lower ends thereof, and pin holes 8' communicating with the pin holes 8 are formed in the pillars 9 that fit into each of the pillars. A large number of holes are made with vertical gaps in between, and a pedestal 9 is inserted into the lower end of each stanchion, and a locking pin 11 suspended by a chain 10 from each stanchion is inserted into the communicating pin holes 8 and 8'. It consists of In the figure, 12 indicates the existing concrete body, and 13 indicates the formwork panel.

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

For pouring underwater concrete, the pillar frame material 7 assembled on land is sunk into the seabed by fitting the back side of the pillar frame material 7 into the existing concrete body 12, but due to unevenness on the seabed. When it is difficult to install the support frame material 7 vertically, the left and right corner supports 2, 2', the front part, or each intermediate support 3 on both sides,
3' by unfitting and unfitting the locking pin 11 of the pillar 9 at the lower end, adjusting the extension of the pillar 9 from the lower end of each pillar, and then inserting and inserting the locking pin 11 into the pin holes 8 and 8' that communicated again. , the support frame member 7 can be easily sunk vertically to the seabed surface. Therefore, even if the seabed surface is slightly uneven, the support frame material 7 can be installed by adjusting the expansion and contraction of the support pillars 9, which simplifies the smoothing work of the seabed surface by divers and saves time and effort. This allows you to streamline your work. After the column frame material 7 is deposited, vertical grooves 1 facing each other between each column,
An arbitrary number of stages of formwork panels 13 are fitted inside the mold 1, and concrete is poured inside.

As described above, the present invention is characterized in that the lower end of the formwork support can be adjusted for expansion and contraction using the pedestal, so that the formwork support can be placed vertically on the seabed. It has various effects.

[Brief explanation of drawings]

FIG. 1 is a plan view of a formwork support provided with an expansion mechanism according to an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG.
The figure is an enlarged sectional view taken along the line A-A in Figure 2, and Figure 4 is its B.
5 is an enlarged sectional view taken along the line C-C. 1... Vertical groove, 2, 2'... Left and right corner supports, 3,
3'... Intermediate support, 4, 4'... Connecting member, 5...
Spacing retaining material, 6... Stay, 7... Support frame material,
8, 8'...pin hole, 9...pillar, 10...chain,
11...Lock pin.

Claims (1)

[Claims] 1. In prefabricated formwork columns used for underwater concrete, insert a pedestal at the bottom end of each column, insert a locking pin into the pin hole communicating with the column and pedestal, and while locking the column, insert the pedestal from the bottom end of the column. An expansion/contraction adjustment device for formwork supports for underwater concrete, which is characterized by being able to expand and contract.