浅水域堆积体精准探测技术应用研究

发布时间：2018-02-10 14:10

本文关键词： 水下堆积体物探小子域滤波全自动触发器气泡效应　出处：《合肥工业大学》2014年博士论文　论文类型：学位论文

【摘要】：对水下堆积体的物质组成及其分布特征等内容的准确了解,往往是水利工程建设与维护的重要基础工作,现多采用综合地球物理勘查(简称物探)方法,确定堆积体的分布范围与深度,再结合相应的钻探,对物探成果进行验证并进一步查明堆积体的物质组成。在浅水区,受水体深度、目标体的结构特征、波浪等外界因素的干扰,使各种物探方法的有效性受到明显影响；不同时期堆积体其组份差异往往较大,由此所构成的堆积体,其物理性质的复杂多变,给物探成果的准确解译形成很大的障碍。以淮河中游干流护岸抛石和大型水库除险抛石为主要研究对象,针对高密度电阻率法、探地雷达法和高密度地震映像法这三种目前主要的工程物探方法,利用不同水深、不同厚度堆积体的数值模拟和现场实测成果,进行有效性对比研究；针对堆积体物性复杂多变的特点,对物探解译方法进行相应的改进；研究过程中,结合实际工作中所常遇的复杂工况,对仪器设备进行适用性改良。所获得的创新成果：(1)对高密度地震映像方法,研制了一种轻型气压式浅水域全自动触发器设备,在经济合理的前提下,有效克服了大能量震源的气泡效应。(2)在综合研究高密度电法、探地雷达和高密度地震映像法在浅水域抛石体探测中所表现的特征和规律的基础上,建立了浅水域抛石体探测的地电模型,并进行了正反演模拟,为浅水域堆积体精准探测应用提供理论支撑；(3)根据浅水域堆积体上覆水体的不同深度,堆积体的结构特征和赋存状态,探索精准探测方法,明确了对应的有效物探方法组合；上述工作,将为不同物探方法的有效选择与野外工作的高效实现提供技术支撑。
[Abstract]:The accurate understanding of the material composition and its distribution characteristics of underwater accumulations is often an important basic work for the construction and maintenance of water conservancy projects. Now the comprehensive geophysical exploration (geophysical exploration) method is often used. Determining the distribution range and depth of the accumulation body, combining with the corresponding drilling, verifying the geophysical exploration results and further finding out the material composition of the accumulation body. In the shallow water area, the depth of the water body, the structural characteristics of the target body, The effectiveness of various geophysical prospecting methods is obviously affected by the interference of external factors such as waves, and the composition of the accumulated bodies is often different in different periods, and the physical properties of the accumulated bodies are complex and changeable. There is a great obstacle to the accurate interpretation of geophysical exploration results. Taking the riprap along the middle reaches of the Huaihe River as the main research object and the large reservoir removing dangerous ripraps as the main research objects, aiming at the three main engineering geophysical prospecting methods at present, the high density resistivity method, the ground penetrating radar method and the high density seismic mapping method, different water depths are used. The effectiveness of the numerical simulation and field measurement results of different thickness accumulations are compared and studied. In view of the complex and changeable physical properties of the deposits, the corresponding improvement of the geophysical interpretation method is carried out. In the process of the research, Combined with the complex working conditions often encountered in practical work, the applicability of the instrument and equipment is improved. The new method of high-density seismic mapping is obtained. A light barometric automatic trigger device for shallow water area is developed. On the premise of economy and rationality, the bubble effect of large energy source is effectively overcome. On the basis of synthetically studying the characteristics and laws of high density electrical method, ground penetrating radar and high density seismic mapping method in shallow water area, In this paper, a geoelectric model for the exploration of shallow water bodies is established, and the forward and inverse simulation is carried out, which provides theoretical support for the application of accurate detection of deposits in shallow waters. (3) according to the different depths of the overlying water bodies in shallow waters, The structural characteristics and occurrence state of the accumulation body, the accurate detection method and the corresponding effective geophysical exploration method combination are explored. The above work will provide technical support for the effective selection of different geophysical exploration methods and the efficient realization of field work.
【学位授予单位】：合肥工业大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TV221

【参考文献】