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首页> 外文期刊>Soil Dynamics and Earthquake Engineering >Liquefaction-induced damage to houses and its countermeasures at Minami-Kurihashi in Kuki City during the 2011 Tohoku Earthquake, Japan
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Liquefaction-induced damage to houses and its countermeasures at Minami-Kurihashi in Kuki City during the 2011 Tohoku Earthquake, Japan

机译：2011年日本东北地震在日本久喜市南栗桥的房屋液化引起的破坏及对策

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摘要

Sand boiling and liquefaction-induced damage to houses and infrastructures occurred in Minami-Kurihashi, Kuki City, during the 2011 off the Pacific Coast of Tohoku Earthquake, Japan. After the earthquake, extensive site investigations were conducted in the affected areas, including 14 borehole surveys and 43 sounding tests, where Piezo Drive Cone penetrometer, a newly developed test method, was used which could be effectively employed in detecting local change of soil profiles. A filled sandy soil layer existed near the ground surface in the affected areas, which originated from reclamation works using dredged materials to construct housing lots. In addition, a Holocene sandy soil layer existed partly at a depth of about 10-13 m. Though these two layers were evaluated to be potentially liquefiable, the liquefaction-induced damage was observed to concentrate in the areas where the reclamation works had been executed, suggesting that the liquefaction of the reclaimed layer caused such damage. It was deduced that possible liquefaction of the Holocene layer did not contribute to the damage and to the occurrence of sand boiling at the ground surface. As countermeasure against future liquefaction, ground water lowering method has been selected, and in-situ tests and numerical analyses were executed to predict the long-term ground settlement. A subsequent study on detailed design of the selected countermeasure is underway as of June 1, 2015. (C) 2015 Elsevier Ltd. All rights reserved.
机译：2011年，日本东北太平洋太平洋沿岸的久气市南栗桥市发生了沙沸和液化对房屋和基础设施造成的破坏。地震后，在受灾地区进行了广泛的现场调查，包括14次井眼调查和43次测深测试，其中使用了一种最新开发的测试方法Piezo Drive Cone渗透仪，可以有效地检测土壤剖面的局部变化。受影响地区地表附近存在填充的砂土层，其起因于使用疏materials材料建造房屋的填海工程。另外，全新世沙质土壤层部分存在于约10-13 m的深度。尽管评价这两层可能是可液化的，但观察到液化引起的损害集中在已进行填海工程的区域，这表明再生层的液化引起了这种损害。可以推断，全新世层可能的液化对破坏和在地面上的砂沸腾的发生没有贡献。作为未来液化的对策，选择了降低地下水位的方法，并进行了现场测试和数值分析，以预测长期的地面沉降。自2015年6月1日起，将对所选对策的详细设计进行后续研究。（C）2015 Elsevier Ltd.保留所有权利。

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