| 摘要 |
PURPOSE: A construction method of a drain passage is provided to reduce working hours and cost by separating the wall form from the support beam form, and to use the support beam form semi-permanently by manufacturing the support beam form of the galvanized iron sheet. CONSTITUTION: Basic concrete(104) is poured into the lower part of a drain passage(103) excavated, and forms are installed to place both side walls(107) of the drain passage at both ends of the basic concrete. An inner form for forming the side wall of the drain passage is penetrated by a joint beam(120), and both side walls of the drain passage are constructed by pouring and curing concrete into the forms for manufacturing the side wall. Two parallel support bars are placed at both sides of the joint beam, and positioned on both cured side walls of the drain passage. A support beam form(200) is bent to extend the recess longitudinally, and supported by two support bars. The support beam form is placed in two support bars to place the joint beam in the recess, and concrete is poured and cured into the recess.
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