A Mechanical Shocking Source Designed for Shallow Seismic Exploration

Abstract

Shallow seismic exploration is the unique approach to obtain first-hand data of engineering geology for municipal construction. In this work, a mechanical shocking source has been designed for facilitating exploration of constructive stratum datum of urban construction. Aiming at the existing issues of three commonly used artificial seismic sources, this device is expected to meet three requirements: (i) Sufficient impact force to guarantee the credibility of the received signal. In view of weak impact energy of sledge hammer, we regulated the compression spring number and elastic coefficient for favorable excitation energy. (ii) Convenience and efficiency. In view of complex structure and expensive price of vibroseis, we adopted a simple and reliable system design to ensure a convenient operation. (iii) Safety and pollution-free. Impact hammer impacts stressed plate under the spring force and its own gravity, so as to avoid unsafe explosion and environmental pollution caused by the sharp chemical reactions.