TENSILE STRESS REDUCTION METHOD WHEN CONSTRUCTING DOUBLE-T BRIDGE BY MOVABLE SCAFFOLDING SYSTEM

摘要

PURPOSE: A tensile stress reduction method when constructing a double-T bridge by a movable scaffolding system is provided to keep the optimum stress by reducing tensile stress on a support. CONSTITUTION: The tensile stress reduction method when constructing a double-T bridge by a movable scaffolding system comprises the steps of: after installing a form of a movable scaffolding system on a primary span, placing concrete; stripping inner and outer forms of the movable scaffolding system; placing temporary prestress on the inside of a support; placing prestress on a web; moving the form of the movable scaffolding system to a secondary span, then repeating the progresses for a primary span to complete the construction works on the secondary span; and dismantling temporary prestress on the primary span when constructing for a third span.