黄岛地区石英二长岩球状风化体特征与成因  

Characteristics and genesis of spherical weathered body in quartz monzonite in Huangdao area

作　　者：冷传旭 姜元杰 常海靖 王晔 徐晨 Leng Chuanxu;Jiang Yuanjie;Chang Haijing;Wang Ye;Xu Chen(Qingdao Surveying&Mapping Institute,Qingdao 266032,Shandong,China;Geotechnical Engineering Technology Center of Qingdao,Qingdao 266032,Shandong,China)

机构地区：[1]青岛市勘察测绘研究院,山东青岛266032 [2]青岛岩土工程技术研究中心,山东青岛266032

出　　处：《地质学刊》2024年第4期379-386,共8页Journal of Geology

基　　金：青岛市城市地质调查项目(ZFCG2019001542)。

摘　　要：岩体中球状风化体与周围风化岩层形成的软硬不均的岩体组合是困扰地铁隧道机械顺利掘进的难题之一。青岛黄岛地区石英二长岩分布广范,球状风化体常见于石英二长岩强风化层中。依托某地铁工程勘察工作,通过钻探取芯、孔内成像、跨孔电磁波CT、岩相学等方法,研究黄岛地区石英二长岩球状风化体的分布规律和工程地质特征,认为黄岛地区剪节理不发育的石英二长岩体中球状风化体的形成与卸荷节理有关。研究成果为该地区及其他地区具有相似地质条件的工程项目提供地质解决方案。The combination of spheroidal weathering bodies within rock masses and surrounding weathered layers of varying hardness presents one of the key challenges in the successful excavation of metro tunnels using mechanical methods.Quartz monzonite is widely distributed in the Huangdao area of Qingdao,where spherical weathered bodies are commonly found in the strongly weathered zones of quartz monzonite.Based on an investigation conducted for a local metro project,methods such as drilling,in-hole imaging,cross-hole electromagnetic wave CT,and petrographic analysis were employed to study the distribution patterns and engineering geological characteristics of the spherical weathered bodies in the quartz monzonite of the Huangdao region.The study concludes that the formation of spherical weathered bodies in quartz monzonite with underdeveloped jointing is related to unloading joints.The findings provide geological solutions for engineering projects in this region and others with similar geological conditions.

关 键 词：球状风化 石英二长岩 工程地质特征 卸荷节理 青岛黄岛地区 

分 类 号：P581[天文地球—岩石学]