REINFORCING CONSTRUCTION METHOD FOR TUNNEL LINING, USING SPRAYED CONCRETE MIXED WITH POLYOLEFIN SHORT FIBER

• Main Authors: MATSUI KENICHI, MATSUURA SEIJI, SHIMIZU YOICHIRO, KANAI SUSUMU, YASUDA YOSHINOBU, MINATO YASUHIRO, SHIINA TAKAYOSHI, NAITO YOSHIO, NONOME HIROSHI, KODAMA MASABUMI, ASAI ISAO, HAKOISHI YASUHIKO, MASHITA HIDETO, SHINTANI TOSHINORI, TANAKA TORU, TAKAHASHI HIDEKI, MIMURA TOMOHIRO, ISHIMURA TOSHIAKI
• Format: Patent
• Language: English
• Published: 28.12.2006
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; ARTIFICIAL STONE; BRAIDING; CEMENTS; CERAMICS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; COTTON-WOOL; EARTH DRILLING; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; FIXED CONSTRUCTIONS; GALLERIES; KNITTING; LACE-MAKING; LARGE UNDERGROUND CHAMBERS; LIME, MAGNESIA; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; METALLURGY; MINING; NATURAL OR ARTIFICIAL THREADS OR FIBRES; NON-WOVEN FABRICS; REFRACTORIES; SHAFTS; SLAG; SPINNING; TEXTILES; TREATMENT OF NATURAL STONE; TRIMMINGS; TUNNELS; WADDING

PROBLEM TO BE SOLVED: To reinforce tunnel lining with sprayed concrete mixed with polyolefin short fibers to give sufficient strength and prevent crack formation. SOLUTION: A reinforcing construction method for tunnel lining of reinforcing the tunnel lining by spraying concrete onto the inner wall surface of tunnel lining. The concrete is mixed with the polyolefin short fibers, which are stretched fibers mainly made of a polyolefin resin and have a sectional shape of approximate polygon having three to six protrusions, where recessions or projections are formed longitudinally of the fiber at the front end of each protrusion. COPYRIGHT: (C)2007,JPO&INPIT