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上海市综合深井长江农场台建于2011年,站点深井中安装地磁仪、应变仪、倾斜仪、测震仪、空隙压仪、地温仪、水温仪、水位仪等多种观测仪器.通过地层的PS波波速测试可以了解该地的地层结构及工程场地地震效应.本次是在第四纪松散土层钻孔完毕,未下套管之前,进行了单孔法PS波波速测试,取得了珍贵的资料和良好的效果.通过计算,取得各土层的P波、S波波速和动泊松比数值.从波速测试的结果可以认为290m到360m为最适合的深度,同时参考了环境噪声影响的角度,从而可以认为290 m以下至最深度均适合投放地震仪器,最终该台选定了460m的深度放置地震监测仪器.基于对PS波速测试结果的分析,可以科学合理选定投放地震仪器的位置,从而能够高质量得保证综合深井项目顺利进行,对以后的再建综合深井台积累了宝贵的经验.
Shanghai integrated deep well farm in Changjiang River was built in 2011. In the deep well of the site, various observation instruments such as geomagnetic, strain gauge, inclinometer, seismometer, gap pressure meter, geothermal instrument, water temperature instrument and water level instrument are installed. PS wave velocity test can understand the stratigraphic structure and site seismic effect.This is a Quaternary loose soil drilling is completed, before the casing, the single-hole method of PS wave velocity test, made precious The data and the good results are obtained.The values of P-wave, S-wave velocity and Moisson’s ratio of each soil layer are obtained by calculation.The results of wave velocity test show that 290m-360m is the most suitable depth, meanwhile, the influence of environmental noise , So that it can be considered that the seismic instrument is suitable to be placed below 290 m to the deepest depth, and finally the station has selected the 460 m depth to place the seismic monitoring instrument.Based on the analysis of the PS wave velocity test results, the seismic instrument can be selected rationally So as to ensure the smooth progress of the integrated deep well project with high quality and accumulate valuable experience for the subsequent reconstruction of the integrated deep well table.