| Title |
Analysis on the Safety of Structure and Economics of Replacement Method Using Rock Debris in the Soft Ground - Case Study of Miho Stream Crossing Road in Cheongju City |
| Authors |
허강국(Heo, Kang Kug) ; 박형근(Park, Hyung Keun) ; 안병철(Ahn, Byung Chul) ; 민병욱(Min, Byeong Uk) |
| DOI |
https://doi.org/10.12652/Ksce.2016.36.4.0705 |
| Keywords |
장래침하;현장계측;연약지반처리;경제성분석 The future settlement;Field measurement;Soft ground treatment;Economic analysis |
| Abstract |
For the soft ground construction, the factors not considered in the design stage occurs in the construction stage so that they cause the increase of the construction cost due to the structural stability and the design change. The subject of the study is the construction section of the industrial complex access road made in the Ochang region of Chungcheongbuk-do. The study is concerned with selecting the soft ground handling method such as the replacement method using rock debris and the surcharge reflecting the service load as the soft ground handling measure and analyzing the effect of reducing the construction cost with the stability of structures and the reduction of the construction period. The soft ground in the study section consists of sandy and cohesive soil and is 2.4m to 5.5m deep. It is distributed unevenly between the 1.5m to 5.9m stratums under the ground surface. Settlement is not serious, but the future uneven settlement and difference are expected so that the future settlement behavior is estimated by analyzing the site measurement results after the soft ground treatment. Moreover, in consideration of the regional characteristics and economic efficiency, soil with good quality is replaced with rock debris as the replacement material so that 29% of the construction cost is reduced due to the increase of stability and the reduction of duration. If the estimation of the dispersion of the pore water pressure within the dam body and the change of the underground water level and the relation of the actually measured soft ground with consolidation is studied further on the basis of the study, it is expected that the behavior of the soft ground will be correctly estimated in various site conditions. |