Abstract
The author was engaged in the construction of the Yokohama line, from Higashi-Kanagawa to Kikuna, in Japanese National Railways as the engineering assistant headman of the Higashi-Kanagawa construction division.
The work was executed without a hitch at March '68, however there are some grate difficulties from the constructional point of view. They were very important problems for the division to carry out safely near the Tokaido line, the largest artery for Japanese transportation, and to administer the amount of construction.
Provided that mentioned to pure engineering problems, they were cleared that there were some soil mechanical problems in considerable wait. The geology in this area consists of alluvial sand and mud, diluvial sand, mud and loam, and pleistcene sandy mudstone. There were such difficulties as to difine the length of piles, to give consideration for the consolidation settlement and excavation for the reason of existence of deep soft ground, drowned valley, water saturated sand strata and etc.
In this paper the author describes above mentioned engineering geological problems and feelings on this on this division in a few words
