液(ye)壓伸(shen)縮(suo)式活(huo)(huo)動(dong)模板(ban)(ban)(ban)是在(zai)(zai)井筒混合(he)作業時,隨工作面(mian)前進自上(shang)而下現澆混凝土時使用的一種(zhong)整體(ti)移動(dong)模板(ban)(ban)(ban),它(ta)是我國各種(zhong)活(huo)(huo)動(dong)模板(ban)(ban)(ban)中(zhong)使用的最多的一種(zhong),這(zhe)種(zhong)模板(ban)(ban)(ban)的基本構(gou)造是:在(zai)(zai)井筒全(quan)部(bu)圓周上(shang),模板(ban)(ban)(ban)分為2~3大塊,大塊之間留有(you)伸(shen)縮(suo)縫,依靠某種(zhong)機構(gou)使伸(shen)縮(suo)縫伸(shen)縮(suo)以達(da)到模板(ban)(ban)(ban)的撐開(kai)和收攏。