苏通大桥场区基岩地质新认识

Understanding of bedrock geology at site of Sutong Yangtze River Bridge

由于工作目的与侧重面的不同,在苏通大桥勘察中仅有的控制性钻孔获得的有关基岩地质的珍贵资料未能深入分析研究,更未予以文字或图面反映出来。在已有资料基础上,经过逻辑分析,对苏通长江公路大桥场区隐伏基岩地质作了新的补充与修订。以往文献推断的白垩系地层证实为三叠系地层;重新勾画了松散层埋深(厚度)等值线;提出了四条控制性断裂带(其他构造线均为其派生断裂)。基于上述认识,简析了有关场区生态环境地质方面的三大问题,即岩溶、地震及地热。

Based on the available data, the hidden bedrock geology at the site of Sutong Yangtze River Bridge has renewed and revised： the former deduced Cretaceous system has now been proved to be Triassic system; the burial （thickness） isoline of the loose beds has been sketched; four controlling fractures have been advanced, with other structure lines are derived fractures. And based on the above understandings, three issues in light of eco-environmental geology were analyzed, they are karst, earthquake and geoheat.