深圳地区燕山期花岗岩风化带划分及鉴别

Classification and Discrimination for Yanshanian Granite Weathered Zone in Shenzhen Area

为了解决目前深圳地区构造带区域燕山期花岗岩风化带施工现场判别上的困难,总结了花岗岩风化带的划分依据,提出了从地质演化的本质方面应按照岩石结构崩解和矿物风化程度强弱、岩石强度方面进行划分风化带。阐述了深圳市花岗岩各风化带的岩石结构崩解特征和矿物风化特征,并指出了相邻风化带的区别特征。以深圳地区多个花岗岩风化带误判工程为例,指出了相似风化岩判别的关键特征,为今后复杂地区桩基持力层勘验提供一定的借鉴作用。

In order to solve the difficulties in distinguishing the Yanshanian Granite Weathering Zone in Shenzhen area,this article summarized the classification basis of the granite weathered zone and pointed out that we should classify the weathered zones from the evolution of geological mass according to the disintegration of rock structure and the weathering degree of minerals.The characteristic of the rock structure disintegration and the minerals weathering in each rock weathering zones are described according to the classification standard of granite weathering zones in Shenzhen and the differences between adjacent weathering zones are pointed out.Taking several distinguish error of granite weathering engineers in Shenzhen as examples,we obtained the key characteristics of the rock classification and provided good reference and experience for similar engineering in the future.