| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a reinforcement method of an existing segment, capable of easily and inexpensively reinforcing the existing segment. <P>SOLUTION: A segment reinforcement part 3 is formed by spraying a reinforcement material (mortar 2) to an inner surface of an existing segment 53 of an existing shield tunnel 1. Also, when spraying the reinforcement material inside a bottomed box part (core 56) opened at one end and surrounded by plates provided so as to rise from the inner surface of the existing segment 53, a reinforcement material falling prevention device for preventing falling of the reinforcement material sprayed inside the bottomed box part is installed so as to be stretched between a pair of walls facing each other of the bottomed box part. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
