granite layer meaning in English

花岗质岩层

With an introduction to the construction of underground diaphram wall in fumin station , shenzhen city , this paper discusses the construction technique of forming dent into much and lightly weathered granite layers . which adopts hydraulic grab and different kinds of impacting drillers , and the construction of good quality protecting wall with mortar
摘要通过深圳地铁福民站地下连续墙施工实例，介绍在中、微风化花岗岩层，采用液压抓斗结合不同类型的冲击钻机和利用优质泥浆护壁的成槽施工技术。