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作者在超高层的四川广播电视塔(313m)深基础勘探中,采用跨孔声波CT层析成象技术,对于大于20m范围内的由杂填土、粉砂质粘土、粘土、中砂、卵石、砾石和泥岩、砂岩等组成的复杂岩土体地基的组成和分区,砂层透镜体的产出空间位置,覆盖层与基岩的接触状态,以及基岩中是否存在断层破碎带等特性作出判断。文章叙述了CT成像的原理、测试布置及结果分析。通过本实例显示,声波CT技术对场地的工程地质条件可以得到更完整、更形象的反映。
The author used cross-hole acoustic CT tomography in the deep foundation exploration of the Sichuan TV Tower (trading 313m) at a super high-rise, and for the areas larger than 20m, including miscellaneous fill, silty clay, clay, medium sand, and pebbles. The composition and zoning of complex rock and soil foundations consisting of gravel and mudstone, sandstone, etc., the location of the production space of the sand lens body, the contact state of the overburden and bedrock, and the presence or absence of fault fracture zones in the bedrock. judgment. The article describes the principle, test layout and results analysis of CT imaging. Through this example, acoustic CT technology can provide a more complete and more vivid reflection of the site’s engineering geological conditions.