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Research Project on Seismic Microzonation in Metro Manila-Estimation of Ground Dynamic Amplification Characteristics by Microtremor Observation-

马尼拉大都会地震微分区研究项目 - 通过微震观测估计地面动力放大特性 -

基本信息

批准号：
07044168
负责人：
ABEKI Norio
金额：
$ 3.39万
依托单位：
KANTO GAKUIN UNIBERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

项目摘要

Followings are research items in this project.(1) Regional division on the basis of geological and geomorphological conditionsUsing of bore hole data in the area, a land form classification map and several geologic cross-sections were developed.(2) Microtremor observations.Distribution maps of predominant period and amplification ratio in the area had been made by observed microtremor.(3) Estimation of under ground deep structure with explosion test in Marikina PlaneExplosion test had been conducted and observed seismic waves on about 15km line to estimate the under groud structure of S-wave velocities.(4) Shallow S-wave Velocity ExplorationShallow seismic refraction explorations were conducted in Metro Manila at 23 sites.(5) Array observation of microtremor Aarray observations of microtremor had been conducted at four sites.(6) Electric surveys at 2 sites for Marikina FaultThe electrical tomography method were applied to found the correct position and structure of Marikina Fault.(7) Observation of EarthquakeIn order to acquire seismograms, we installed a strong seismograph at Manila Observatory at Ateneo University. The seismographs up to date acquired the seismograms for eight earthquakes.By those results of each research items, we had understand of the geological conditions in Metro Manila and we can offer the basic data to the seismic mitigation research in the area.Joint research meeting with 3 international research groups had been conducted as Workshop on Seismic Microzonation at March 9-10,1998, in Hayama Seminar House of Kanto Gakuin University and published a proceedings of abstracts. The proceedings of full papers fo each presentation will be published in near future as a special isue of the Bulletin of Institute of Science and Technology, Kanto Gakuin University.

以下是本项目的研究内容。(1)根据地质地貌条件进行区域划分利用钻孔资料，编制了地貌分类图和若干地质剖面图。(2)利用观测到的地脉动，绘制了该地区的卓越周期和放大率分布图。(3)用Marikina平面爆炸试验估算地下深部结构在约15 km的测线上进行了爆炸试验和观测地震波，以估算地下S波速度结构。(4)浅层S波速度勘探在大马尼拉的23个地点进行了浅层地震折射勘探。(5)地脉动台阵观测在四个测点进行了地脉动台阵观测。(6)马里基纳断层2个点的电测应用电层析成像方法确定了马里基纳断层的正确位置和结构。(7)地震观测为了获得地震图，我们在雅典耀大学的马尼拉天文台安装了一台强地震仪。迄今为止，我们的地震仪获得了8次地震的地震记录，通过每项研究的结果，我们了解了大马尼拉的地质条件，为该地区的抗震研究提供了基础数据。1998年3月9- 10日，我们与3个国际研究小组举行了联合研究会议，即地震小区划研讨会。在关东学院大学的Hayama研讨会上发表了论文摘要。每一次报告的全文将作为关东学院大学科学技术研究所公报的特刊在不久的将来出版。