MUDDY EARTH PRESSURE SHIELD TUNNELING METHOD, EARTH PRESSURE SEMI SHIELD TUNNELING METHOD AND MUD-ADDING MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a muddy earth pressure shield tunneling method and an earth pressure semi shield tunneling method imparting excellent plastic fluidity, water-stopping property to the excavated soil and sand and sufficiently suppressing syneresis, improving excavating efficiency, and to provide a mud-adding material suitably used in civil engineering work such as the tunneling methods.;SOLUTION: The invention relates to the muddy earth pressure shield tunneling method using the mud-adding agent, wherein the mud-adding material comprising (A) a (meth)acrylic acid-based water-soluble polymer having 500,000-6,000,000 of weight average molecular weight and (B) a dispersing agent with ≤100,000 of weight average molecular weight.;COPYRIGHT: (C)2006,JPO&NCIPI