摘要
珠江口内伶仃岛以北水域海底工程地质调查表明,该海域海底表层土主要为流泥和淤泥。钻孔揭露海底以下36.6m土层,从上到下依此划分为11层,为流泥、淤泥质土、淤泥、流泥、淤泥、粗砾砂、粉质粘土、中细砂、花岗岩残积土、强风化花岗岩和中风化花岗岩。在综合研究了区域地质、海底地形地貌、地质灾害类型、海底土的物理力学性质、土体稳定性、砂土液化特性的基础上,将研究区划分为工程地质Ⅰ区、工程地质Ⅱ区和工程地质Ⅲ区,进行了工程地质条件和各区的稳定性评价,认为Ⅰ区为次稳定区,Ⅱ区为不稳定区,Ⅲ区为次不稳定区。
Submarine engineering-geological investigations in the sea region north of Neilingding Island at the Pearl River Mouth show that the submarine surface soils in the sea region consist mainly of flowing mud and silt, Drilling has revealed that the soils to a depth of 36.6 m from the sea bottom may be divided from the top downward into 11 layers, which are flowing mud, silty mud, silt, flowing mud, silt, coarse gravelly sand, silty clay, medium-fine sand, granite residual soil, strongly weathered granite and moderately weathered granite. On the basis of an integrated study of the regional geology, submarine topography and geomorphology, geo-hazard types, physical-mechanical properties of submarine soils, soil stability and sandy soil liquefaction, the study region may be divided into three engineering-geological areas： area Ⅰ （metastable area）, area Ⅱ （less stable area） and area Ⅲ （unstable area）. Stability and engineering-geological conditions of these areas have been evaluated.
出处
《地质通报》
CAS
CSCD
北大核心
2005年第10期1052-1059,共8页
Geological Bulletin of China
基金
中国地质调查局<珠江三角洲近岸海洋地质环境与地质灾害调查>项目(编码200311000006)成果
关键词
海底土
工程地质分区:稳定性评价
珠江口
submarine soil
engineering-geological area
stability evaluation
Pearl River Mouth
作者简介
石要红（1966-），女，高级工程师，从事海洋环境工程地质、灾害地质调查研究。E-mail：yaohongshi@21cn．com
