Contrastive Study of Foundation Pit Supporting Demolition

The mechanical demolition and the explosive demolition are mainly made use of dismantling the foundation pit supporting currently.This paper chose the two large foundation pit supporting demolition in Shanghai as the background,first adopted vibration monitor to monitor demolition vibration,interviewed and investigated noise influence on residents,recorded construction period and so on,then analyzed contrastively vibration harm,noise harm,engineering schedule,flying-rock harm,economic cost and safety of different demolition methods,finally multi angle summarized advantages and disadvantages of mechanical demolition and blasting demolition.The explosive demolition is better than the mechanical demolition owing to smaller vibration harm,tiny noise pollution,short construction period,smaller fry-rocks harm and lower cost.