Course Title : Fundamental Geofront Engineering

Code 10F405
Course Year Master and Doctor Course
Term 1st term
Class day & Period Tue 1st
Location C1 Jin-Yu Hall
Credits 2
Restriction No Restriction
Lecture Form(s) Lecture
Language English
Instructor Prof. Mamoru MIMURA, Prof. Makoto KIMURA, Assoc. Prof. Yosuke HIGO

Course Description

This course deals with near-surface quaternary soft soil deposits that are the most important in the engineering sense. Physical properties and the mechanical characteristics of partially saturated and fully saturated soils are explained, and then various problems in terms of disaster prevention and infrastructure construction are discussed.

Grading

Performance grading will be provided based on examination. Attendance and quality of assigned reports, etc. are considered.

Course Goals

The aim of this course is to understand engineering problems and their mechanical background in the following points:
- Physical properties and mechanical characteristics of quaternary soft soil deposits and relevant engineering problems in terms of disaster prevention
- Fundamentals of unsaturated soil mechanics and engineering problems of earth structures in terms of disaster prevention
- Concepts of innovative underground foundations and structures and engineering problems during construction

Course Topics

Theme Class number of times Description
Outline of the course, introduction to quaternary deposits 1 Introduction to quaternary deposits. Types and mechanisms of geotechnical disasters relevant to quaternary deposits.
Geo-informatic database 1 Geo-informatic database and its application to modelling soft alluvial soils, liquefaction hazard map, etc.
Evaluation of subsurface structure based on GID 1 Scheme to evaluate subsurface structures using Geo-informatic database including boring logs, geophysical exploration, geological structures. Application to Kyoto basin is given.
Evaluation of liquefaction for near-surface sand depoits 1 Evaluation of liquefaction for near-surface sand deposits using Geo-informatic database is explained. Applications to the 1995 Hyogo-ken Nanbu Earthquake and the 2011 Off the Pacific Coast of Tohoku Earthquake are given, through which open questions are discussed.
Problems of soft clay deposits 1 Deformation characteristics and stability of soft clay deposits and their evaluation methods are explained, e.g., effectiveness and limitation of ground improvement, long term settlement problem, and case histories of large scale reclamation.
Concept of innovative underground structures 1 Citizen-participate-type renovation technique for unpaved roads using sandbags.
Concept of innovative underground structures 1 New construction method of embankments using consecutive precast arch culvert.
Concept of innovative underground structures 2 Technical problems of steel pipe sheet pile. Development of consecutive steel pipe sheet pile and its application.
Outline of earth structures, Unsaturated soil mechanics 2 Roles of earth structures as an infrastructure. Unsaturated soil mechanics.
Damage of earth structures caused by rainfall and earthquake 1 Case examples and their mechanisms of the damages of earth structures caused by rainfall and earthquake.
Methods to evaluate and improve stability of earth structures subjected to rainfall and earthquake 1 Design methods of earth structures and their problems are outlined.
Site visit 1 Visit construction site relevant to the issues of this course.
Evaluation and feedback 1 Evaluation of achievement by examination, and its feedback.

Textbook

Handout will be distributed.

Textbook(supplemental)

References are indicated in the handout.

Prerequisite(s)

Undergraduate courses in geology, geotechnical engineering, and soil mechanics.

Independent Study Outside of Class

Web Sites

Additional Information