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岩溶地区地形、地质情况相对复杂,各种物探方法的应用都受到一定条件限制,进行岩溶断裂破碎带勘察时,应进行综合物探勘察,为设计和施工提供可靠的原始资料;本文采用综合物探方法对广州地铁九号线工程田美断裂进行探测,详细查明田美断裂的走向、破碎带宽度、构造破碎特征、断裂的性质、规模和产状等;同时辅以少量勘察验证孔施工对断裂做验证,以便有效地揭示断裂特征,通过实验取得较理想的成果,并意外地发现了田美断裂的次一级断裂。
The karst terrain and geological conditions are relatively complicated, and the application of various geophysical methods is limited by certain conditions. When undertaking karst rupture exploration, comprehensive geophysical exploration should be carried out to provide reliable initial data for design and construction. In this paper, geophysical prospecting methods The Tianmei fault of Guangzhou Metro Line 9 project was probed to find out the direction of the Tianmei fault, the width of the fractured zone, the characteristics of the crustal structure, the nature of the fault, the size and the shape of the fault. At the same time, So as to reveal the fracture characteristics effectively and obtain the better results through experiments. The second-order faults of the Tiamei fault were unexpectedly discovered.