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Keywords:DayaBay;PIPelines;InsPeetions;Enviornmentalgeology大亚湾海底管道铺设可行性研究 目录 0引言...........................................1 1工程概况!必要性和工程效益分析..................2 2路由区的自然环境条件...................... 2.1气候...........................................4 1气温....................................................4 2降水....................................................4 3风......................................................5 4雷暴....................................................6 5雾与能见度..............................................6 6热带气旋................................................6 1.11.1d1.,.11.1,.几Q-Q- 9目q乙 Q-O乙 2.2水动力状况.....................................8 2.2.1潮波性质................................................8 2.2.2台风增水................................................9 2.2.3波浪....................................................9 2.2.4水温与盐度....,..................................10 2.2.5海水悬沙...............................................11 44t匕;J内bJ.l111.1,.IJ.l3路由区的工程地质条件........... 3.1地层........................... 3.2岩浆岩......................... 3.2.1侵入岩.............................. 3.2.2火山岩.............................. ......... ......... ......... 3.3地质构造......................................16 3.4地形地貌......................................19 3.5沉积及浅地层特征..............................20 3.6主要的工程限制性地质条件......................22 3.6.1地壳运动与活动断裂.....................................22 3.6.2地震活动...............................................22 李大亚湾海底管道铺设可行性研究 3.6.3软土地基...............................................22 3.6.4冲淤积状况..................,....................22 3.6.5起伏基岩...............................................22 3.7沉积化学特征..................................22 3.8工程地质条件评价..............................23 4海洋规划与海上活动.............................24 4.1路由区海洋功能区划和开发规划...................24 4.1.1路由区海洋功能区划.....................................24 4.1.2路由对海洋功能区划的影响...............................26 4.2路由区海洋开发规划............................26 4.3渔业生产......................................27 4.3.1渔业捕捞状况...........................................27 4.3.2海水增养殖状况.........................................27 4.3.3管道建设对渔业生产的影响...............................29 5路由区环境地质调查概况.........................30 `日qnUQdOd :::::: 5.1调查项目..........# 5.2调查范围....... 5.3测线布设及工作量..............................30 5.3.1主测线.......................................#...30 5.3.2检查测线...............................................31 5.4调查设备......................................34 6环境地质调查测量方法...........................37 6.1测量坐标系!高程基准面........................ 6.1.1坐标系............................... 6.1.2高程基准面............................................. 6.2现有水准点和平面控制点........................ 37 37 6.3本次测设的水准点和平面控制点..................38大亚湾海底管道铺设可行性研究 6.4测量方法......................................38 6.4.1定位..............................,..............38 6.4.2水尺设立及水位改正.....................................39 7环境地质调查数据采集和处理.....................41 7.1水深测量......................................41 7.2侧扫声纳......................................41 7.3浅地层剖面....................................41 7.4校准和质量控制................................42 7.4.1定位...................................................42 7.4.2声纳拖鱼位置...........................................42 7.4.3浅剖...................,.........................42 7.4.4水深测量...............................................42 7.5后处理.............,....................43 7.5.1测深...................................................43 7.5.2成图...................................................43 8路由区环境地质调查成果.........................44 8.1排污管道环境地质调查成果......................44 8.1.1区段1的地质地貌成果(KOP一KP12)......................44 8.1.2区段2的地质地貌成果(KP12一KP20+l73).................48 8.2原料输送管道环境地质调查成果..................51 8.2.1区段1的地质地貌成果(KOP一KPZ+938)...................51 8.2.2区段2的地质地貌成果(KPZ+938一KP7+823)...............53 8.2.3区段3的地质地貌成果(KP7十823一KPg+498)...............53 8.3路由区环境地质评价............................56 8.3.1排污管道区的环境地质...................................56 8.3.