| Title |
An Experimental Study on the Estimation of Optimum Length of Soil Flow Protector with Wall Stiffness |
| Authors |
유재원(Yoo, Jae-Won) ; 서민수(Seo, Min-Su) ; 손수원(Son, Su-Won) ; 임종철(Im, Jong-Chul) |
| DOI |
https://doi.org/10.12652/Ksce.2019.39.6.0789 |
| Keywords |
공동;토사유입차단판;침하 감소 효과;최적 길이 비 Cavity;Soil flow protector;Reduction effect of settlement;Ratio of the optimal length |
| Abstract |
The settlement hardly occurs in structures supported by pile foundation such as abutment, culvert but a cavity is formed in the lower part of a structure. As a result, soil discharged from the lateral ground to the cavity accelerates the settlement of the lateral ground of the structure, resulting in a larger settlement. Therefore, in order to prevent problems caused by cavity under the structure supported by pile foundation, soil Flow Protector (briefly called 'FLP'), which can be easily installed on the side of structure, was developed. In this study, an laboratory model test was carried out to prove the reduction effect of settlement and to estimate the optimal installation length of the FLP. As a result, the installation of the FLP reduced the settlement of the lateral ground and prevented the leakage of lateral ground soil into the cavity. If the stiffness of the FLP is small, the state or active earth pressure is generated in the upper part, which is not favorable for stability. But if the stiffness of the FLP is high enough, the passive earth pressure area is generated in the upper part, which will be advantageous for the stability. Also, the increased installation length of FLP is effective to reduce the settlement. And the ratio of the optimal length of the FLP to the box structure height (H = 250 mm) are flexible FLP 1.38, stiff FLP 0.73. |