JPS6231460Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a device for preventing floating of reinforcing bar cages used in continuous underground wall construction.

In continuous underground wall construction, a reinforcing cage is erected after each panel has been cut, and underwater concrete is poured using tremie pipes. At this time, as shown in FIG. 1, the concrete pressure that wraps around the reinforcing bar cage acts on the reinforcing bar cage to cause it to float. Therefore, when concrete is poured, measures must be taken in advance to prevent the reinforcing bar cage from floating up.

The device for preventing floating of reinforcing bar cages for continuous underground walls of this invention was devised for the purpose of satisfying the following conditions in view of the need to prevent floating of reinforcing bar cages as described above.

Must have sufficient strength to prevent the reinforcing bar cage from floating.

The equipment should be easy to install.

The device must be able to be removed and repurposed.

Examples illustrating this invention (Figs. 2 to 8) are as follows.
The explanation will be based on Figure).

This floating prevention device provides anchor bars 2 on a guide wall 1 around a continuous underground wall, and connects them to a reinforcing bar cage 3 using a jig as described later to prevent floating.

The anchor reinforcements 2 are protruded from the upper surfaces of the guide walls 1 on both sides at predetermined or appropriate intervals along the continuous underground wall to be constructed. In this embodiment, in order to lock the shackle 7, the protrusion is embedded in the guide wall 1 in the shape of an inverted U.

4 in the figure is a receiving frame for the reinforcing bar cage 3, and H-shaped steel is used. A holding frame 5 made of channel steel or the like is placed over this receiving frame 4 to press down the receiving frame 4 to prevent the reinforcing bar basket 3 from floating up. A presser metal fitting 6 is provided over the presser frame 5 and can be slid on the presser frame 5. Then, it is slid to the position of the anchor bar 2 and connected to the anchor bar 2 using a connecting member such as a shaft 7. In the illustrated embodiment, the presser metal fitting 6 consists of two hanging pieces 8 and 9, one of which is short and the other long, two connecting pieces 10 that connect these pieces, and a horizontal piece 11 at the lower end of the connecting piece 10. A recess is formed. The longer hanging piece 8 is provided with a hole through which a bolt of the shaft 7 is inserted, and is used for connection with the anchor bar 2. Further, a screw hole is formed in the horizontal piece 11 approximately in the center, and a tightening adjustment bolt 12 is inserted into the screw hole.
are screwed together. The tip of the tightening adjustment bolt 12 is designed to come into contact with the upper surface of the presser frame 5, and therefore, by rotating and pushing the tightening adjustment bolt 12 while the anchor bar 2 and the presser metal fitting 6 are connected by the shackle 7. The anchor bar 2 and the presser frame 5 are tightly connected. As a result, the receiving frame 4 of the reinforcing bar cage 3 is held down by the holding frame 5, so that floating of the reinforcing bar cage 3 is prevented.

In the construction procedure, as shown in FIGS. 6 to 8, first, the presser pedestal 5 is placed on the receiving pedestal 4. Note that construction can be simplified by making the presser frame 5 a prefabricated integral piece. Next, the presser metal fitting 6 is placed on the presser frame 5 and slid to the position of the anchor bar 2. The anchor bar 2 and the presser metal fitting 6 are connected by the shaft 7, and then the tightening adjustment bolt of the presser metal fitting 6 is tightened to tightly connect the anchor bar 2 and the presser frame 5. After this, underwater concrete will be placed and a series of continuous underground wall works will be carried out.

This invention consists of the above-mentioned structure, and in addition to achieving the above-mentioned purpose, it has the advantage that even if the position of the anchor bar is irregular, there is no problem in installation, and the anchor bar and the reinforcing bar cage can be tightly tied together. .

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view for explaining the floating of the reinforcing bar cage, Fig. 2 is a plan view of an embodiment of this invention, Fig. 3 is a left side view, Fig. 4 is a front view, and Fig. 5 is a The right side view and FIGS. 6 to 8 show the construction procedure. FIG. 6 is a vertical cross-sectional view in a direction perpendicular to the underground wall, FIG. 7 is a perspective view, and FIG. 8 is a side view. 1. Guide wall, 2. Anchor wire,
3. Reinforced cage, 4. Support stand, 5. Holder stand,
6... Presser metal fitting, 7... Shackle, 8, 9...
Hanging piece, 10... Connecting piece, 11... Horizontal piece, 1
2. Tightening adjustment bolt, 13. Tremy tube, 1
4. Concrete.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Anchor bars protruding from the upper surface of the guide wall, a presser frame suspended over the reinforcing bar cage receiving frame,
It consists of a presser metal fitting that straddles the presser frame and slides on the presser frame, and a connecting member that connects the anchor bar and the presser metal fitting. A device for preventing floating of a reinforcing bar cage for continuous underground walls, characterized by screwing together bolts. (2) The device for preventing floating of a reinforcing bar cage for a continuous underground wall according to claim 1 of the utility model registration claim, wherein the connecting member is a shackle.