FOLDING AND UNFOLDING APPARATUS OF STEEL FORM FOR CONSTRUCTING A LINED TUNNEL

摘要

PURPOSE: A removable apparatus of a steel mold is provided to support a hydraulic cylinder by a supporting arm without the separation of a jack bolt. CONSTITUTION: A removable apparatus of a steel mold comprises a supporting arm(10) and a hydraulic cylinder(50). The supporting arm comprises a first connection(101), a second connection(109) and a joint(15). The first connection is hinge-connected with a central body. The hydraulic cylinder comprises a joint connection(51) and a central body connection(53). The joint connection is hinge-connected with the supporting arm. The central body connection is hinge-connected with the central body.