| 摘要 |
PURPOSE: A doubling method of a synthetic resin well mold form is provided to bear up the pressure generated during concreting by supporting from the outside. CONSTITUTION: A base plate(11) as an external form is made of synthetic resins. The height of the base plate is a little higher than an internal form and the length is about 3cm shorter than the internal form. Struts(12) are arranged around the external form at regular intervals, and nails are driven from the inside to the outside. After the assembly of the internal form is finished, the external form is installed, and then steel wires(14) are installed. At a connection point, a turnbuckle is installed to correspond to expansion force. A reinforcing plate is installed at a weak point, and panels are connected by reinforcing bolts.
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