论文部分内容阅读
本文通过地震折射法探测小东江水电站坝址区河床覆盖层厚度,阐明地震折射法在工程地质勘测中的应用效果。文章以坝址区地质为基础、地球物理特征为前提、折射波法理论为依据,全面地、系统地分析并论述选择地震折射波法的合理性和可行性;然后提出地震折射波法的模拟设计原则、参数计算成果以及测网布置和野外施测技术等。使用经典的t_0法解释全部实测资料,得到全测区河床覆盖层厚度并绘制基岩等高线图。经基坑开挖后证明:实测的高程资料与当年物探绘制的基岩等高线资料基本相符。由此可见,应用地震折射法进行探测不但可满足工程地质的要求,而且与其他勘探方法比较,还具有独特的优点。
In this paper, the thickness of riverbed cover in the dam site of Xiaodongjiang Hydropower Station was detected by seismic refraction method, and the application effect of seismic refraction method in engineering geological survey was clarified. Based on the geology of the dam site, geophysical characteristics as a precondition and the theory of refraction wave method, the article analyzes and discusses the rationality and feasibility of seismic refraction wave method comprehensively and systematically. Then, the simulation of seismic refraction wave method Design principles, the results of parameter calculation as well as the layout of the test net and field test techniques. Using the classical t_0 method to interpret all the measured data, the thickness of riverbed cover in the whole survey area is obtained and the contour map of bedrock is drawn. After foundation pit excavation proved: The measured elevation data and geophysical mapping of the contour line data basically consistent. Thus, using seismic refraction method to detect not only meet the requirements of engineering geology, but also with other exploration methods, but also has unique advantages.