초록 ▼

A method of making a primary concrete covering wall on the surface of the wall of a tunnel which extends behind a shield type tunnel excavator. A form structure for casting concrete to make the covering wall is assembled with a plurality of arcuate form assemblies respectively including form segment

A method of making a primary concrete covering wall on the surface of the wall of a tunnel which extends behind a shield type tunnel excavator. A form structure for casting concrete to make the covering wall is assembled with a plurality of arcuate form assemblies respectively including form segments and timbering members for reinforcing the cast and set concrete. The form segments of each assembly are detachably coupled to the timbering member. The form structure is disassembled after the cast concrete is set by detaching the form segments of the respective assemblies from the timbering members to leave the members on the primary covering wall of the set concrete, whereby the primary covering wall can be held in stable state simultaneously with completion of the primary covering wall on the tunnel wall surface.

대표청구항 ▼

A method of making a covering wall on a peripheral wall surface of a tunnel extending behind a shield type excavator, said method comprising the steps of preparing a plurality of form assemblies respectively comprising a form segment for use in casting concrete for forming a primary covering wall an

A method of making a covering wall on a peripheral wall surface of a tunnel extending behind a shield type excavator, said method comprising the steps of preparing a plurality of form assemblies respectively comprising a form segment for use in casting concrete for forming a primary covering wall and a timbering member for reinforcing said primary covering wall, said step of preparing the form assemblies including the step of detachably coupling said form segment to said timbering member; installing a covering-wall form structure, said step of installing the form structure including the step of assembling the covering-wall form structure from said form assemblies with their timbering members opposed to said peripheral tunnel wall surface; casting concrete into a space defined between the peripheral tunnel wall surface and said covering-wall form structure to form the primary covering wall; and removing the form structure after said cast concrete has set, said step of removing the form structure including detaching the form segments from the timbering members but leaving the timbering members installed against the primary covering wall of the set concrete.