| Title | Geotechnical Monitoring and Measures against Liquefaction at Harbor Area (2/3) |
| Dept | Transportation Technology and Information Division |
| Year | 2004 |
| Month | |
| Price | |
| Summary | Published in April 2004 IOT SERIAL No. 93-65-798, 576pp. Taiwan is located in the western branch of the Cum-Pacific Seismic Belt therefore, earthquakes occurred frequently. Under strong earthquake shaking, the liquefaction of sandy soils of alluvium and reclaimed lands in western coastal area of Taiwan may occur, and cause damages for coastal and harbor facilities at this area. Hence, this project is divided into five subprojects: (1) Seismic Wave and Excess Porewater Pressure Monitoring at Harbor Area, (2) Soil structure of Harbor Area, (3) Local Models of Liquefaction and the Risk of Liquefaction at Harbor Areas, (4) Measures against Liquefaction and Ground Improvement at Harbor Area, and (5) Ground Subsidence Monitoring of Harbor Areas. In the first subproject, the ground surfaced and embedded seismographers and piezometers were installed in Taichung and Taipei Harbor areas. In the second subproject, geophysical methods are conducted to investigate the soil speed structure. H/V ratios from micro tremor measurements are used to study the site effect of Taipei harbor area. In the third subproject, we collected 174 CPT data sets and 288 SPT data sets of liquefaction and non-liquefaction cases from Chi-Chi earthquake. Some local models for evaluating liquefaction potential using CPT data and SPT data were established in this study. In the fourth subproject, some methods of soil improvement for measures against liquefaction of soils were summarized and their mechanisms of improvement were analyzed. Applicable methods of soil improvement for local soil conditions at harbor area and guidelines for design and construction of these methods will be proposed. In the fifth subproject, observation wells with depth of 200m to monitor subsidence and groundwater pressure were set up in Taichung Harbor, Pudai Harbor, AnPeng Harbor and Tapeng Bay. |
| Post date | 2005/08/15 |
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