Case study of surface settlement due to tunneling construction

• Main Authors: yu-yi Chang, 張有毅
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/07436423707079719267

碩士 === 國立中央大學 === 土木工程學系碩士在職專班 === 91 === ABSTRACT Because of the soil stress release from the face of excavation, some surface settlement was created during the period of tunneling construction. Historic cases indicated that the surface settlement is inevitable. Since the surface settlement is inevitable in the construction stage, so, settlement amounts can comply with the requirements of specification is expected by engineers. Field driven log and instrumentation data of Tucheng Line Project CD551, MRT was used in this article. By means of normalizing the depth of instrumentation, than, the relationship between normalize data and settlement can be obtained. Furthermore, we can get length of the inflection point by means of Peck method, compare the normalize data with length of the inflection point. An equation can be established. Since relationship among the normalize data, length of the inflection point and settlement amounts has been created, than, engineer can predict settlement amounts at any position. The relationship among the boring log data, TBM driven log and instrumentation data has been analysis in this article also, and a tendency between TBM driven parameters and settlement can be observed.