| Title |
Construction Stage Analysis of Structure Settlement Using Underpinning |
| Authors |
이종협(Lee, Jonghyop) ; 허승진(Heo, Seungjin) ; 옥수열(Ok, Suyeol) ; 임윤묵(Lim, Yunmook) |
| DOI |
https://doi.org/10.12652/Ksce.2012.32.3A.131 |
| Keywords |
언더피닝;안정성;침하량;지중 구조물 underpinning;construction stage analysis;settlement;underpass structure |
| Abstract |
This paper aims to present accurately analytical modeling method for underpinning using uncertainty reduction, obtained from comparison between numerical analysis and Site measuring data during construction and service stages. Combination of various conditions should be considered for using numerical analysis to predict the behavior of the structure accurately, even though complexly considered the conditions, real construction should be secured the stability by applying the actual instrument measurement data because predicted results are including the considerable uncertainty. In order to secure the stability during construction, the real time instrument measurements together with numerical analysis results performed before construction state are complementary used actively. From the results of this study, the significant settlements are occurred not only in underpass structure of adjacent excavation area but also in the permanent steel pipe structures were analyzed. From the site measurement results of underpass settlement, the settlements are occurred in every stages of excavation, furthermore observed tendency is asymmetrical excavation patterns are settled more than symmetrical excavation patterns. The essential consideration points for numerical analysis are construction sequence, the direction of the existing facilities, the methods of elements modeling, the applied factors for nature of material and different results would be occurred depending upon inputting the above factors. |