浅层高分辨率反射地震试验研究:以雄安新区第四系为例OA北大核心CSTPCD

The urban planning and construction of Xiong'an New Area puts forward high requirements for high-precision underground space exploration.As a high-resolution ground geophysical exploration method,reflective wave seismic exploration technology shows a good application prospect.In this paper,the high-precision and effective reflection seismic detection technology under the condition of thick coverage area was explored,and the reflective P-wave technology was used to improve the resolution of shallow seismic exploration methods in Xiong'an New Area.According to the actual detection target,the experiment results,considering different acquisition factors such as geophone,source type,trace space and receiving arrangement length,were compared and analyzed,and the appropriate source type and optimal acquisition parameters were explored under existing conditions.Combined with the actual data processing and stratified interpretation,the experimental research shows that the use of high-frequency geophone and the selection of vibroseis can achieve ideal excitation effect.According to the test target,the longitudinal resolution of internal reflective P-wave seismic exploration in the thick coverage area at 50～300 m depth can be effectively improved by combining the measures of trace space and appropriate arrangement and reception,and the test obtains rich effective wave group information.It praves a basis for the fine division and interpretation of the internal strata,and obtains a good test result.The method can provide a useful reference for the fine detection of urban underground space under similar environment.