Applied Research On The Precise Detection Technology Of Accumulation Bodies In Shallow Waters

The exploration of accumulation bodies’ composition and its distribution characteristics is always the basis for hydraulic engineering construction and maintenance. The integrated geophysical survey is applied mostly to deduce the distribution range and depth of accumulation bodies. Then, the results of geophysics is verified and the objects’ materials are discovered according to drilling. However, almost all of the geophysical methods are affected by external factors, such as water depth, structure characteristics of the target body and wave. And it is believed that the material difference in the accumulation bodies during various periods is often larger, leading to difficulty of processing geophysical interpretation.The paper takes dumped riprap in the middle reaches of Huaihe River and danger elimination riprap as main research objects. In view of the high density resistivity method, ground penetrating radar and seismic imaging as the three major engineering geophysical exploration methods, the targets’ density, velocity and dielectric constant the forwarding computing is conducted where the physical parameters of water depths change,.The geophysical interpretation technology according to the complicated property of the accumulation bodies is improved for the complex accumulation body physical characteristics. And the geophysical equipment’s applicability is also improved in order to adapt to the complex condition during surveying. The innovations are:(1) It improves a light pressure type automatic trigger device which could be used in shallow waters during high density seismic image surveying, and the improved device will overcome the bubble effect of the large energy source.(2) On the basis of the characteristics of high density resistivity method, ground penetrating radar and high density seismic image method, a shallow waters riprap model is established, which will provide theoretical support for accurately detecting accumulation bodies under the premise of economic rationality.(3) A precise survey method according to different water depth, structure characteristics and occurrence status of accumulation bodies is probed, the corresponding effective combination geophysical surveying is also clear out. The above results will be effective for different geophysical exploration method selection and field work efficiently to provide technical support.