Seismic behavior of Shimagami pumping station and Seibu sewage treatment plant

摘要

By the 1995 Hyogoken-nanbu earthquake, many structures were damaged by lateral flow of liquefied soil layers. This paper describes performance of Shimagami pumping station in Kobe City, which was not damaged irrespective of occurrence of the lateral flow, and results f simplified analyses of soil cement mixing walls which were surrounding the underground structures of the pumping station. It also presents performance of the second series of facilities in Seibu sewage treatment plant in Kobe City, which was free from any structural damage, and results of similar analyses of diaphragm walls supporting the facility partly. It was estimated that the earth pressure difference caused by the lateral flow of the liquefied soil layers was on the order of several percent of the total overburden pressure or less and that connecting the underground walls with the building would effectively increase their capacities against the lateral flow.