环北部湾广东水资源配置工程合雷段工程地质条件分析  

Analysis of the Engineering Geological Conditions of the Helei Section of the Guangdong Water Resources Allocation Project around the Beibu Gulf

作　　者：廖康涔 LIAo Kangcen(Guangdong Hydropower Planning and Design Institute CO.LTD.,Guangzhou 510635,China)

机构地区：[1]广东省水利电力勘测设计研究院有限公司,广东广州510635

出　　处：《河南水利与南水北调》2023年第10期38-39,共2页Henan Water Resources & South-to-North Water Diversion

摘　　要：为环北部湾广东水资源配置工程合雷段对缓解湛江市水资源供需矛盾意义重大。结合工程建设需要,开展合雷段原状土样的工程特性试验研究,归纳分析区域内各岩土层的物理力学特性、场地类型与地震效应及环境腐蚀性。结果表明,合雷段原状土样多为高密度、中高压缩性,弱渗透性土,抗剪强度中等。边坡抗水流冲刷能力差,开挖边坡需采取必要的工程加固措施。建筑场地土体为Ⅱ类软弱土-中硬土,基本地震动峰值加速度为0.10 g,基本地震动反映谱特征周期0.35 s,对应地震基本烈度为Ⅶ度。地下水及土层对钢结构多具微腐蚀性。研究结果可为该地区的工程建设、岩土工程勘察和水文地质勘察提供数据支撑,对优化水资源配置格局和筑牢粤西高质量发展坚实水资源支撑具有指导意义。The Helei section of the Water Resources Allocation Project in Guangdong Province around Beibu Gulf is of great significance in relieving the contradiction between water supply and demand in Zhanjang.In conjunction with the construction needs of the project,an experimental study on the engineering properties of the undisturbed soil of the Helei section was carried out to summarize and analyse the physical and mechanical properties,site type,seismic effects and environmental corosion of each soil layer in the area.The results show that the undisturbed soil in Helei section are mostly high-density,medium-high compressibility,weak permeability and medium shearing strength.The side slopes are poorly resistant to water erosion,so the necessary engineering reinforcement measures are required for excavating slopes.The soil mass of the construction site is Class Ⅱ soft soil-medium hard soil,with a basic seismic peak acceleration of O.10 g.The characteristic period of basic ground vibration reflection spectrum is 0.35 s,and corresponding seismic basic intensity is Ⅶ degree.Groundwater and soil layer are mostly slightly corrosive to steel structures.The study results can provide data support for engineering construction,geotechnical engineering investigation,and hydrogeological investigation in the area.It is of guiding significance to optimize the pattern of water resources allocation,to strength the high-quality development of western Guangdong,to build solid water resource support.

关 键 词：环北部湾 合雷段 物理力学特性 场地类型 地震效应 环境腐蚀性 

分 类 号：TU43[建筑科学—岩土工程]