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首页> 外文期刊>Soils and foundations >Investigation report of geotechnical disaster on river area due to typhoon landfall three times on Okhotsk region, Hokkaido, Japan
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Investigation report of geotechnical disaster on river area due to typhoon landfall three times on Okhotsk region, Hokkaido, Japan

机译：日本北海道鄂霍次克地区因台风登陆造成的河区岩土灾害调查报告三次

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For one week from August 17 to 23, 2016, three consecutive typhoons made landfall in Hokkaido for the first time on record. These typhoons and the front they stimulated brought record-breaking torrential rain over the eastern part of Hokkaido. To investigate the damage to grounds and rivers resulting from this rainfall, the Japan Society of Civil Engineers (JSCE) and the Japanese Geotechnical Society (JGS) formed a disaster research group to conduct an investigation. This report provides the results of the investigation into damage to the grounds of areas along the Tokoro River of the Okhotsk region, Hokkaido, that suffered from this tremendous and diverse disaster. Specifically, the report describes the situation of the levees which were broken and eroded by the overflowing water, the shape of the levee bodies, the levee body soil properties examined by observation of the sections, as well as the occurrence of sand boiling and air blows. The washout of road embankments as well as damage to road bridge mounting fills and abutment backfills were also investigated. The investigation has demonstrated the need to clarify the resistance of the abutment backfills and levee bodies to flowing water as well as the geotechnical predominant factors in order to clarify the mechanisms behind erosion and washout, the need to review new measures that allow for the scale of sand boiling and resultant changes in levee body stability, and the fact that the existing embankments were able to temporarily suppress the flooding water which had spilled over from the river. Furthermore, although it has been identified that the findings of a study on an embankment washout associated with a tsunami can be applied to measures taken against the overflowing water, it has also been found necessary to clarify the predominant geotechnical factors using model tests and to use a more sophisticated analytical approach to establish a geotechnical stability review as soon as possible in order to prevent the levees and embankments from being eroded and washed out due to overflowing water. (C) 2019 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.
机译：从2016年8月17日至23日，为期一周的连续三个台风有史以来首次登陆北海道。这些台风和它们激发的锋面给北海道东部带来了创纪录的暴雨。为了调查这种降雨对地面和河流造成的破坏，日本土木工程师学会（JSCE）和日本岩土工程学会（JGS）成立了一个灾难研究小组进行调查。该报告提供了对北海道鄂霍次克州托科罗河沿岸地区土地遭受破坏的调查结果。具体而言，该报告描述了被溢流的水破坏和侵蚀的堤防的状况，堤防体的形状，通过观察截面检查的堤防体土壤性质以及发生沙沸和吹气的情况。 。还研究了路堤的冲刷以及路桥安装填料和基台回填的损坏。调查表明，有必要弄清桥基回填和堤坝主体对流动水的抵抗力以及岩土工程的主要因素，以便弄清侵蚀和冲蚀的背后机制，有必要审查新的措施以确保规模砂沸腾和由此导致的堤防稳定性变化，以及现有堤防能够暂时抑制从河中溢出的洪水这一事实。此外，尽管已经确定，与海啸相关的路堤冲刷的研究结果可以用于针对溢流水采取的措施，但也发现有必要使用模型试验来阐明主要的岩土工程因素，并使用一种更复杂的分析方法，以便尽快建立岩土工程稳定性评估，以防止堤坝和堤岸因溢水而被侵蚀和冲刷。 （C）2019年由Elsevier B.V.代表日本岩土工程学会制作和主持。

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