| Title |
Response Analysis of Block-Bearing Structure due to Tunnel Excavation in Clay Ground |
| DOI |
https://doi.org/10.12652/Ksce.2014.34.1.0175 |
| Keywords |
점토지반;터널굴착;지반손실량;블록지지구조물;손상평가 Clay ground;Tunnel excavation;Ground loss;Block-bearing structure;Damage estimation |
| Abstract |
The methods of design of mat foundation may be classified as the rigid method and the flexible method according to the assumptions used. In the rigid method, the mat is assumed to be infinitely rigid and the contact pressure is assumed planar distribution. However, the contact pressure is not planar but curved surface because the real mat is not rigid. Therefore, it is not precise to analyze the mat foundation using the rigid method, and so there is no choice but to accept an error. On the other hand, in the flexible method, the mat is considered as the plate on the elastic foundation. This elastic plate theory is for the infinite plate acting a concentrated load on the elastic foundation. However, the functions for the moment, shear, and the deflection by the flexible method are very complex, there are many difficulties for the designer to use them. Also, it is impossible to use the design aid figures as a substitute of the complex functions, because they do not cover the values at the critical sections for the moment and shear. Therefore, in this research, the simplified functions for the moment, shear, and the deflection are proposed by regression analysis for an designer to use easily the flexible method. The simplified functions are very accurate and very ease to use. |