EARTH PRESSURE REDUCTION FOR CULVERTS USING EPS

作者：Y Ooe, Yasuhira Matsuda, S. Tada, Jun′ichi Nishikawa · 年份：1996 · 被引用次数：3 · 研究领域：Geotechnical Engineering and Underground Structures、Geotechnical Engineering and Soil Stabilization、Geotechnical Engineering and Analysis

As settlement differences between fills on top of culverts and those of surrounding culverts sometimes occur, box culverts today are designed anticipating earth pressure larger than the overburden pressure on culverts. Therefore, construction costs are higher because larger members for culverts are used. Although extra earth pressure is taken into account, earth pressure larger than this estimated amount is sometimes observed. A new construction method was examined, which reduces earth pressure acting on a culvert by placing a thin layer of EPS (Expanded Poly-Styrol) above a culvert and avoids the settlement difference. First, a model test and an FEM analysis were made before the trial construction. The results of the test and the FEM analysis show that earth pressure acting on the culvert in the section where the EPS was placed was about half of that in the section where no EPS was placed. Furthermore, from the results of the test and the FEM analysis, a trial construction and centrifuge model tests were made to confirm the effectiveness and to consider possible design methods. For the covering abstract see ITRD E109968.