Application of CT20-2 anti-spreading agent in repairing and strenthening dock wall

A new construct1on technique in repairing and strengthening dock wall under water is introduced in th1s paper. Some construction methods,such as foundation widening,rockfill foundation-bed,inverted filter and reinforccd concrete protecting wall,are discussed comprehensively.Indexes of physico-mechanical properties and application of subaqeous nonspreading concrete with CT20-2 anti-spreading agent are emphatically introduced.