- مبلغ: ۸۶,۰۰۰ تومان
- مبلغ: ۹۱,۰۰۰ تومان
Ilan area is located between the east and the northeastern earthquake regions of Taiwan, which the earthquake occurs quite frequent. Langyang Plain is alluvial plain coupling with fine particles of loose granular soil and high groundwater level, the possibility of soil liquefaction in Ilan area is very high once the earthquake occurs. Therefore, soil liquefaction potential needs to be carefully investigated. In Ilan area the primary soil liquefaction areas was formed with precision is 1/25000 scale. February 6, 2016 Meinung earthquake in the southern Taiwan area brought a lot of liquefaction damages. Therefore, soil liquefaction once again gains people attention. The precision of soil liquefaction potential map is requested to improve to 1/2500 scale. In order to improve the precision of geospatial information effectively, the geological drilling density of 4 holes/km2 are demanded. The drilling method employs the SPT method in general. The soil physical test is taken every 1.5 m or the soil layer change. This study adds about 213 boreholes of geological drilling data in the densely populated areas, low floor houses, old buildings and complex geological conditions of Ilan area. It is believed that we can use the drilling data to know the soil liquefaction potential more accurately. Finally, this study will use SPT-N HBF analysis method to calculate soil liquefaction potential value. The method is a simple evaluation technique to determine the occurrence of soil liquefaction in Taiwan with good accuracy and reliability. The proposed analysis in this study can be used to accomplish more precise soil liquefaction potential with different size earthquake occurs in the region.
Ilan area is located in such an unique environment when the earthquake occurs would suffer quite high possibility of soil liquefaction. Although the earthquake in recent years in Ilan region did not carry serious liquefaction disasters, one cannot be ignored that Ilan area is undoubtedly highly liquefied sensitive. In view of this, it is necessary to improve the precision of soil liquefaction potential map, so that the assessment and improvement of soil liquefaction disaster can be carried out promptly.
In the current point, the improvement of soil liquefaction potential map project is mainly executed for Ilan city, Luodong Town, and Wujie Township. The initial arrangement for distribution of drilling holes has been roughly completed with the required density of 4 holes/km2 . The drilling method employs SPT standard penetration test method for the sampling every 1.5 m or soil layer change and perform the soil physical properties general test. Follow-up progresses such as data documentation, analysis operation, and related internet system construction for their benefit need to wait for the completion of the supplementary drilling operation.