The method of construction KY-8 pipejacking and propulsion method and apparatus for propulsion which composed of cobble and/or crushed rock in soil layer

摘要

The present invention utilizes a plurality of air- breaker installed in the front part of the promotion lead pipes, lead pipes Promotion while shred hobakdol along the front of the girth , after crushing the hobakdol niche in the lead shield made of special steel using a plurality of pressure jack about 1m line promotion after promotion was secured through the main building by a leading space shield 2 relates to promoting fair way out of the indentation method of promoting Korean hobakdol ground to propel (KY-8 propulsion method ) and its equipment .