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事例分析による地盤の側方流動の予測に関する研究

横向地流预测的实例分析研究

基本信息

批准号：
10128239
负责人：
若松加寿江
金额：
$ 1.86万
依托单位：
The　Association for Earthquake Disaster Prevention
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas (A)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至无数据
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10128239/
关键词：
液状化側方流動地震被害事例

项目摘要

昨年度までは,地盤・地形条件等が単純で,地盤上に大規模な構造物が構築されていない地域において事例分析を行い,模型実験や液状化土を非線形流体と見なした場合の相似則および模型地盤の流動実験の結果と総合して,傾斜地盤の地表面変位量の予測式を提案した.本年度は地盤・地形条件がやや複雑な側方流動の事例を対象として,以下の分析を行った。1) 1995年兵庫県南部地震の際に内陸傾斜地で発生した地表面の水平変位の原因究明神戸市や西宮市の六甲山麓の住宅地でも地盤の水平移動が生じ,多くの埋設管路に被害が発生したことが報告されている.これらの地域の地盤移動についての原因を,現地調査,航空写真測量,地盤調査資料等に基づき検討した結果,神戸市長田区会下山地区の六甲山麓の丘陵地を切り盛り造成した住宅地で発生した地盤移動は,地表面勾kが大きく現地調査の結果からも液状イロこよる側方流動ではなく盛土等のすべりによる可能性が高いと判断し.た.これに対して,長田区会下山の扇状地上における地盤移動および西宮市夙川上流域の六甲山麓の造成地における地盤移動は,地形:地盤条件,噴砂の発生状況などから液状化による側方流動に起因して発生した可能性が高いことが分かった.2) 市街地における建物基礎等が地表面変位量に与える影響の評価1964年新潟地震における新潟駅周辺の市街地および1995年兵庫県南部地震における神戸市,西宮市の住宅地で発生した側方流動の事例分析を行い,建物基礎などの地中構造物の存在がその地域の側方流動による地盤の水平変停量に与える影響について,地震当時存在した建物の基礎構造の調査,航空写真測量,地盤データの液状化簡易解析などに基づき検討を行った.その結果,建物の基礎杭や地下室が存在する市街地における変位量は,更地ないしそれに近い地盤の変位量に比べて約半分に低減されることがわかった.

Last year's weather, terrain conditions and other environmental conditions were affected, and large-scale models were created on the ground. The case analysis of the regional climate was conducted, and the model was used to liquify the non-shaped fluid of the soil. If the temperature is similar, the flow behavior of the model is consistent, and the position measurement of the ground surface is suitable for the proposed measurement. This year, the terrain conditions of the earth floor are similar to those of the square flow. The following is an analysis of the situation. The main results are as follows: 1) in 1995, the reason for the horizontal displacement of the ground surface in the southern part of the military database was found out. It is clear that the ground floor has moved horizontally in the foothills of the Liujia foothills in the western city of Shengli City, and the buried pipelines have been killed in many places. This is the result of basic geological survey, such as local survey, aerial photo survey, geological survey data, and so on. The result of the cutting event in the foothills of Liujia Mountain in Changtian District, Shenzhou City, has resulted in the relocation of residential land, housing, housing, and residential areas. The ground surface is very heavy, and the results show that the liquid phase is affected, the square flow is affected, the soil is filled, and the possibility is very high. た. In Changtian District, the ground will be moved downhill and fan-shaped on the ground, and the ground will be moved by the Piedmont of Liujia in the upper Sichuan valley of Xiyang City. Topography: geotechnical conditions Sand, sand, water, etc. in the city, the location of the ground surface of the city, such as the building base, etc., and the impact of the earthquake in 1964, the earthquake in 1964, the new earthquake, the city, the southern part of the database, the city, the south, the city, the south, the city, the city, the city Analysis of the case of flow in residential buildings in Xi'an City, there are two levels of flow in the buildings, such as the level of stops and effects in the buildings, the earthquake, the airborne photogrammetry, the measurement of airborne photos, and the analysis of the liquids of the buildings. The results show that there is a lot of space in the basement of the building, which is much lower than that of the city.