JPS60129361A - Extension controller of mold frame support for underwater concrete - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for adjusting the lower end of a formwork support used in the underwater concrete IJ-toe method for breakwaters and the like so as to adjust it 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. In order to eliminate the above-mentioned drawbacks, the present invention has been made so that the lower end of the formwork support can be adjusted to expand and contract, thereby allowing the formwork support to be placed on the seabed surface. It is characterized by being easily installed vertically and improving work efficiency.

Hereinafter, the present invention will be explained in detail with reference to the embodiment drawings.
2' are arranged at appropriate intervals, and the left and right corner supports 2.2'
Front intermediate columns 3 with vertical grooves 1°1 on both sides are erected at specified intervals, and vertical grooves are installed in front of each image section intermediate column 3 and left and right corner columns 2°2' at appropriate intervals. A desired number of front connecting members 4 are removably fastened with bolts, and side intermediate struts 3' are formed with vertical grooves 1, 1 in the front and back direction in the rear direction of the left and right corner struts 2, 2'. Please use the specified intervals.

The left and right connecting members 4' are removably fastened with bolts on the outer surfaces of the left and right side intermediate columns 3/, 3/ and the left and right corner columns 2, 2' at appropriate vertical intervals. Spacing retaining members 5 are arranged vertically and at appropriate intervals on the opposing surfaces of each of the opposing side intermediate struts 3' and 3/, and are removably secured with bolts. Connecting member 4/, 4
In the support frame material 7 in which the stays 6 are removably stretched in a cross-like manner, the left and right corner supports 2, 2' and each intermediate support 3, 3'
is formed into a cylindrical shape, and an arbitrary number of bottle holes 8 are opened at the lower end thereof, communicating from the front to the back, and a bottle hole 8' communicating with the bottle holes 8 is formed in the pillars 9 that fit into each of the pillars, upper and lower. A large number of holes are opened at intervals, and a pillar 9 is inserted into the lower end of each pillar to communicate with the pin hole 8.
．． A locking pin 11 suspended from a chain 10 is inserted into each support column 8'. 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 support frame material 7 assembled on land is sunk into the seabed by fitting the back side of the support frame material 7 into the existing concrete body 12, but there are irregularities on the seabed. When it is difficult to install the column frame material 7 vertically, the locking pins 11 of the pillars 9 at the lower ends of the left and right corner columns 2゜2', the front, or the intermediate columns 3, 3' on both sides can be removed. After adjusting the extension of the pillars 9 from the lower ends of each pillar, the locking pins 11 are inserted into the pin holes 8 and 8' which are connected again.
The support frame member 7 can be easily installed vertically on the seabed surface. Therefore, even if the seabed surface is slightly uneven,
Since the support frame material 7 can be installed by adjusting the expansion and contraction of the support pillars 9, the work of smoothing the sub-bottom surface by the diver is also simplified, saving time and making the work more efficient. After the support frame material 7 has been deposited, an arbitrary number of stages of formwork panels 13 are fitted into the opposing longitudinal grooves 1, 1 of each support frame, 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 by the pedestal, so that the formwork support can be placed vertically on the seabed, and has the above-mentioned remarkable effects. It is something that plays.

[Brief explanation of drawings]

Fig. 1 is a plan view of a formwork support provided with a telescoping mechanism according to an embodiment of the present invention, Fig. 2 is a side view thereof, and Fig. 3 is Fig. 2A-
FIG. 4 is an enlarged sectional view taken along line A, FIG. 4 is an enlarged sectional view taken along line B-B, and FIG. 5 is an enlarged sectional view taken along line C-C. 1 vertical groove, 2.2' left and right corner supports, 3, 3' intermediate supports, 4.
4' connecting member, 5 interval holding material, 6 stay, 7 support frame material,
8.8' pin hole, 9 pillars, 10 chains, 11 locking pins

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, lock it, and then attach the pedestal to the bottom end of the column. An expansion/contraction adjustment device for formwork supports for underwater concrete, which is characterized by its ability to expand and contract more.