Suction pump with soil capillary pressure for the drainage of levee bottom

2015 Fiscal Year Final Research Report

• Project/Area Number: 25630204
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Geotechnical engineering
• Research Institution: Chubu University
• Principal Investigator: SUGII Toshio 中部大学, 工学部, 教授 (90196709)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 毛管上昇高 / キャピラリーバリア / サクションポンプ / ドレーン / 堤体内液状化

Outline of Final Research Achievements

In Tohoku district and Kanto district, lots of river levee were collapsed by the Great East Japan earthquake, 2011. These are considered that the liquefaction of levee body occurred by the existence of soil water of the depression on a soft ground. Therefore, a suction pump with a soil capillary phenomena has been examined with laboratory tests and numerical analysis. The summary of results are (1) state quality of soil material affect the rate of drain, but amount of drainage are the same as both of cases, (2) Balance of high capillary pressure and high permeability are required for soil material being used in a pump, (3) shape change of the outlet port can prevent from making capillary barrier, and (4) though taking a time, the reproducibility of drain is obtained against repeating seepage and drain.

Free Research Field

地盤工学