Study On The Acquisition And Processing Of Shallow Reflection Wave

As more and more highway and bridges put into operation, all kinds of disease in the geological structure of the lower also appear constantly. These disasters not only directly affect the national traffic safety,cause huge economic losses, also pose threat to people's safety. Therefore, testingunderground structure of the important section of a highway should be given enough attention. Shallow seismic reflection method is a commonly used technique in shallow geological exploration.This thesis makes research on shallow geological exploration technology based on the data acquisition and data processing.This article in terms of data acquisition mainly introduced the design of observation system, the selection of seismic wave excitation andseismic wave receiving, finallydesigned a upper computer software based on the.net platform, this software has realized the function of original data collection and storage, the original data was stored with *. txt format, but seismic exploration industry often uses the SEG-2 file storage format, so in this article, *. txt format will be converted to *. seg2 formatthrough the use ofIXSeg2 Segy software. This article in terms of data processingmainly introduced the principles of the Radon transform,trace gathers, velocity analysis, common reflection multiple stacking method, time-depthconversion. In addition, corresponding software was designed on the.net platform.Data processing module focuses on Radon transform and the time-depthconversion.The strong surface wave interference does not exist in deep reflected wave method.According to this article research direction, special consideration is required to remove surface wave interference.This thesis adopted the Radon transform to filter out the effect of surface wave, which laid a foundation for subsequent accurate calculations ofreflected wave velocity.The buried depth of strata interface is found with the help of time-depthconversion formula in this thesis.The display of the geological structure in the time domain isconverted to the depth domain. So the underground structure can be showed out in a more intuitive way.Finally, this thesis verified data acquisition and data processing program through simulation data.In view of the data acquisition module, waveform generated by signal generator, recovered and stored waveform on the upper computer software to prove the feasibility of the software.In view of the data processing module, simulation of geological model is established. Data processing program designed by this thesis obtained depth profile which is in conformity with thesimulation model. These results in practice proved the feasibility of the data processing module software.In conclusion, data acquisition and data processing in the shallow geological exploration technology are studiedin this thesis. According to the characteristics of shallow geological structure, Radon transform was adopted to filter surface wave, and ultimatelyfinished the design of acquisition and processing module. The simulation data proved the feasibility of software.