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http://dx.doi.org/10.12652/Ksce.2019.39.6.0789

An Experimental Study on the Estimation of Optimum Length of Soil Flow Protector with Wall Stiffness  

Yoo, Jae-Won (Pusan National University)
Seo, Min-Su (Pusan National University)
Son, Su-Won (Pusan National University)
Im, Jong-Chul (Pusan National University)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.39, no.6, 2019 , pp. 789-799 More about this Journal
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.
Keywords
Cavity; Soil flow protector; Reduction effect of settlement; Ratio of the optimal length;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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