摘要
在江苏省苏州-南通长江公路大桥桥址区钻孔中发现了特殊的基岩,即三种角砾灰岩,为确定它们是否是活动断裂中的物质,该文对其进行了研究。结果表明,ZZK6孔和EZK6孔的角砾灰岩不是构造角砾灰岩,分别是重力流角砾灰岩、风暴流角砾灰岩,对大桥稳定性没有威胁;而B1孔基岩虽是构造角砾灰岩,但由于B1孔所在的断裂是老断裂,对大桥地基也没有威胁。
The special bedrock that is there types of taconite limestone have been found out, this paper have studied on them in order to affirm whether they are substance of active fault belts. The study shows that the taconite limestone of ZZK6bore and EZK6 are not structural taconite limestone, they are respectively gravity flow brecciola and storm flow brecciola . They haven't threaten to the stability of bridge. Though taconite limestone of Bl bore is structural taconite limestone,it hasnt threatened the stability of bridge because the fault on Bl bore is old fault.
