摘要
本文主要通过室内试验取得全风化花岗岩的物理性质、水理性质指标,结合野外资料,阐述了该区全风化花岗岩的工程地质特性,肯定了该区全风化花岗岩具有胀缩土特征,其物理力学性质受含水量的控制,随含水量的多少而变化。工程地质条件较差,常常给工程建设带来很大困难和麻烦,甚而造成严重灾害。试验证明,原生矿物之间的联结已被次生粘土矿物所取替,原岩的性质发生了根本变化。全风化岩的物性指标,可为风化岩的划分和分带提供依据。
Based on the indexes of the physical property,hydraulic property of the full weathered—granite and combined with some data of field,this paper demonstrates the characteristics of engineering geology of the full weathered—granite,and confirms that the full weathered—granite in this area resembles the characteristics of the expansive soil and that its physiccal and dynamic properties are controlled by its water content and changes with level of water content.Its engineering geological conditions are poor so as often to br- ing more troubles,even some serious hazard to the engineering construction.The geotechnical tests testfied that the connection among the original minerals has been re- placed by the secondary clay minerals and that a fundamental changes accure in the proper- ty of Original rocks.so,the physical index of the full weathered—rocks can supply the basis for the classifying and the zoning of the weathered—rocks.
关键词
花岗岩
全风化
工程地质
胀缩性
compressional—dilatational property
full weathered—granite
condition of engineering geology
