Construction of Data-Base for High-capacity Micro-pile method Yoshinori Otani,P.E. ｊ p Hirose & Co., Ltd. Prof. Masaru Hoshiya Musashi Institute of Technology Aug.27th 2004 IWM ’04 Tokyo

Contents Purpose of the Data-Base Background Frame of the Data-Base Challenges Summary

Purpose of the Data-Base Design Optimization Gathering,Sharing and Communication for Technical Information of HMP Bearing Capacity Characteristics Seismic Performance Deformation Performance

Background(1) Difference of Design Codes Fig.1 Comparison of Design Bond Stress between Highway Bridge and Rail-road Bridge Experiences of HMP in Japan

Background(2) Seismic Performance of MP Fig.1 Damage under the Kobe-Earthquake Comparison of between reinforced wall by MP and non-reinforced wall

Frame of the Data-Base Fig. Frame of the Data-Base System

1)Basic Data Engineering Evaluations Market Analyses Reliability Study Develope new technology Basic Data Formation of structures and piles Design,Construction data Ground condition of the Existing Works

2)Bearing Capacity Characteristics Loading Test in-situ of HMP Loading Test Result (load-displacement curve) on HMP Load factor Design Method on Performance Design Design safety index, Partial safety factor, Coefficient of variation Code Calibrations Limit state, Performance function

3)Seismic Performance Measurement by Acceleration Seismographs Research of the structures received damage by Earthquake

4)Deformation Performance Fig. Displacement Analysis of Pile Photo. Deformation on the head of HMP Takenaka Corporation Uncertainties deformation performance deformation analysis Research deformation conditions associated with changes in loading history over long periods

Challenges Developing tools for collecting data Managing proprietary rights in data attributable to organizations Integrating data formats

Summary It is urgently necessary to construct a Limit State Design Method incorporating reliability techniques in the process of transition towards Performance Provision Design. Data to be collected for optimizing designs are thought not only to serve as simple mathematical statistic works but also to be used as materials for geo-technical verification. It is hoped that in the future these databases will be available for differing ground characteristics and regions and contribute towards internationally integrated design standards.