EVALUATION OF NATURAL SLOPE FAILURES INDUCED BY THE 2004 NIIGATA-KEN CHUETSU EARTHQUAKE
EVALUATION OF NATURAL SLOPE FAILURES INDUCED BY THE 2004 NIIGATA-KEN CHUETSU EARTHQUAKE
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DOI：
10.3208/sandf.46.727
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发表时间：
2006-12
影响因子：
3.7
通讯作者：
H. Toyota;Jinxing Wang;Kouichi Nakamura;N. Sakai
中科院分区：
文献类型：
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作者：
H. Toyota;Jinxing Wang;Kouichi Nakamura;N. Sakai
自2004年新泻地震以来，发生在地震中心附近的斜坡坍塌引起了人们的极大关注。1995年的Hyogoken-Nambu地震影响了现代大城市和城市基础设施，但丘陵和山区在新泻-Ken Chuetsu地震中遭受了严重破坏。在那次地震中，长冈市小石(前身为山口村)发生了多次山体滑坡。当许多城镇因山体滑坡切断交通和公共服务生命线而变得孤立时，社会问题就出现了。泥石流的泥土关闭了河道，并沿着流经Koshi的自北向南的Imo河形成了天然大坝。天然大坝淹没了一些城镇，并迅速采取紧急措施，防止天然溃坝造成的泥石流。此外，在陡峭的斜坡上也发生了许多地表滑坡。由于这些滑坡的先例很少，因此必须弄清滑坡的内生和外生因素。为此，该地区的地形和地质根据每种破坏类型进行了安排。此外，对某边坡失稳场地的饱和和非饱和土样进行了三轴试验，以检验土体的强度特性。本研究旨在提出可帮助判断天然边坡失稳风险的评估项目。
Slope failures occurring near earthquake centres have attracted much attention since the 2004 Niigata-ken Chuetsu Earthquake. The 1995 Hyogoken-nambu Earthquake affected large modern cities and urban infrastructure, but hilly and mountainous areas suffered heavy damage from the Niigata-ken Chuetsu Earthquake. During that earthquake, numerous landslides occurred in Koshi of Nagaoka city (formerly Yamakoshi village). Social problems developed when many towns became isolated because landslides cut off traffic and public service lifelines. Soil from landslides closed river channels and formed natural dams along the Imo River, which flows north to south in Koshi. The natural dams submerged some towns and emergency measures were promptly undertaken to prevent debris flows caused by natural dam breaks. In addition, many surface slides also occurred at steep slopes. The endogenous and exogenous factors of those landslides must be clarified because of their few precedents. For that purpose, topography and geology in this region are arranged according to each failure type. In addition, triaxial tests of saturated and unsaturated soils obtained from a slope failure site were conducted to examine the soils' strength properties. This research is intended to propose estimation items that can help to judge the risk of natural slope failure.