| 摘要 |
PROBLEM TO BE SOLVED: To provide a ground lateral flow countermeasure structure capable of reducing the response of a structure during the vibration while maintaining the effect reducing passive earth pressure q<SB>NL</SB>to the lateral flow of the ground after the earthquake. SOLUTION: The structure 4 is constructed in a non-liquefaction layer 2 located upward of the ground water level, and it is supported by a plurality of piles 3, etc. driven into a liquefaction layer 1. The circumference of the structure 4 is excavated, and a trench 5 surrounding the structure 4 is provided. An external appearance of the trench 5 is a rectangular shape in plan view, and the inside of the trench 5 is filled with a high viscous fluid 6 consisting of asphalt and bentonite mortar, etc. In an upstream side wherein the lateral flow occurs, a sheet pile 7 is driven in a position opposed to the structure 4 by holding the trench 5 between them. It is desirable that the width of the trench between the sheet pile 7 and the structure 4 is at least an assumed ground flow displacement, and the width of the trench in the other direction is sufficient enough to have about several cm to about ten or more cm. COPYRIGHT: (C)2006,JPO&NCIPI
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