Pit structure of elevator hoistway

摘要

(57) Abstract Objective The rainwater which invaded inside the pit with the pump expulsionWhen doing, the pump is plugged by the rubbish inside the pitThing is prevented. Constitution Inside pit 10 in water permeability concrete tsuThe te to provide the box 11 which was made, inside that box 11 the buffer12 and 13 etc was enclosed.