PROPULSION CONSTRUCTION METHOD

PROBLEM TO BE SOLVED: To facilitate surfacing of a propulsion guide body to a specified position by placing heavy material around a specific surfacing position of the ground surface in a surfacing process of a propulsion construction method. SOLUTION: A path shown by a broken line from an end point...

Full description

Saved in:
Bibliographic Details
Main Authors YAMADA YUKISHIGE, HATTORI MASAYA, SOGAWA TAKASHI, KABEUCHI TERUO
Format Patent
LanguageEnglish
Published 20.01.1998
Edition6
Subjects
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To facilitate surfacing of a propulsion guide body to a specified position by placing heavy material around a specific surfacing position of the ground surface in a surfacing process of a propulsion construction method. SOLUTION: A path shown by a broken line from an end point A2 of a horizontal crossing process reaching a spot A2 from a spot A1 is made a predetermined track of a surfacing process up to a specific spot X of the ground surface. When annular heavy material 40 with the flat bottom face is placed in the form of surrounding the spot X on the ground surface, downward pressure F is applied to the ground surface through the bottom face. This pressure F has an effect of controlling in the direction of heightening earth pressure around the spot X so as to make it easy for a guide body 2a to come out around the center of an opening part 44 provided at the center of the heavy material 40 avoiding an area of the pressure F applied from the heavy material 40. The guide body 2a is thereby guided to the vicinity of the ground surface spot X.
Bibliography:Application Number: JP19960173191