ABSTRACT
The amount of bridges grows 10 thousands per year in China, which has reached hundreds of thousands at present. And the cast-in-situ concrete box girder is widely used in city over-pass. The cuplok scaffolding is the most widely used formwork support system in cast-in-place construction in domestic, which has characteristic of strong carrying capacity, simple structure, convenient assembly[1]. But in recent years, many collapse accidents caused by instability of cuplok scaffolding occurred in domestic, which result in heavy casualties and huge economic losses[2]. So the comprehensive evaluation of stability in cuplok scaffolding in construction process is critically important.
