海上风电场建设的前期地质调查研究方法
|
摘要
建设海上风电场的前期地质工作是调查研究场址的地质条件适宜性问题,地质条件适宜性体现在地层的稳定性和地层的承载力两个方面。为研究海南岛东方市近海建设海上风电场适宜性问题,在研究区域进行了侧扫声呐测量、单道地震测量和地质钻探工作,利用侧扫声呐图像数据研究测区海底地貌单元,识别可能引发小型地质灾害的潮流沙脊、沙波等地貌单元;利用单道地震数据研究海底浅地层沉积状况,识别可能引发地质灾害发生的断层、古河道、浅层气及海底滑塌等构造;根据地质钻孔岩芯样品的物理力学指标定量分析地层稳定性和承载力。研究结果表明,研究区域地层稳定性较好,有2个较好的持力层,满足风力发电塔承载力要求,研究区域适合海上风电场建设。
The preliminary geological work in offshore wind farm construction is to investigate the suitability of geological conditions of the site,which is reflected in the stability and bearing capacity of the stratum. In order to study the suitability of offshore wind farm construction in Dongfang City in Hainan Island,the side-scan sonar,single-channel seismic survey and geological drilling are carried out in the study area. The data from the side-scan sonar images are used to study the submarine geomorphic units in the study area,and identify the tidal sand ridges,sand waves and other geomorphic units that may cause small-scale geological disasters. The single-channel seismic data are used to study the sedimentary conditions of submarine shallow stratum,and to identify the faults,ancient river channels,shallow gas and submarine slumping which may lead to geological disasters. The stability and bearing capacity of the stratum are quantitatively analyzed based on physical and mechanical indexes from geological borehole core samples. The study demonstrates that the stratum stability is good in the study area,where there are two good bearing strata which can meet the requirements of the bearing capacity of wind power tower. The study area is suitable for offshore wind farm construction.
The preliminary geological work in offshore wind farm construction is to investigate the suitability of geological conditions of the site,which is reflected in the stability and bearing capacity of the stratum. In order to study the suitability of offshore wind farm construction in Dongfang City in Hainan Island,the side-scan sonar,single-channel seismic survey and geological drilling are carried out in the study area. The data from the side-scan sonar images are used to study the submarine geomorphic units in the study area,and identify the tidal sand ridges,sand waves and other geomorphic units that may cause small-scale geological disasters. The single-channel seismic data are used to study the sedimentary conditions of submarine shallow stratum,and to identify the faults,ancient river channels,shallow gas and submarine slumping which may lead to geological disasters. The stability and bearing capacity of the stratum are quantitatively analyzed based on physical and mechanical indexes from geological borehole core samples. The study demonstrates that the stratum stability is good in the study area,where there are two good bearing strata which can meet the requirements of the bearing capacity of wind power tower. The study area is suitable for offshore wind farm construction.
引文
[1]罗承先.世界风力发电现状与前景预测[J].中外能源,2012,17(3):24~31.Luo Chengxian.Wind power generation today in the world and prospect forecast[J].Sino-Global Energy,2012,17(3):24~31.(in Chinese)
[2]中华人民共和国国家标准.海洋调查规范第10部分:海底地形地貌调查(GBT 12763.10-2007)[S].北京:中国标准出版社,2008The State Standards of the People's Republic of China.Specification for oceanorgaphic survey—Part 10:Submarine to pography and geomorphology(GBT 12763.10-2007)[S].Beijing:Standards Press of China,2008.(in Chinese)
[3]王超凡,殷红艳,赵永贵.海南石梅湾地区工程地质条件综合研究[J].工程地质学报,2001,9(3):282~285.Wang Chaofan,Yin Hongyan,Zhao Yonggui.Intergrated study on enginering-geological conditions in Shimeiwan area,Hainan[J].Journal of Engineering Geology,2001,9(3):282~285.(in Chinese)
[4]杨江平,石要红,曾宁烽等.广西北海近海工程地质特征及特殊性问题分析[J].地质学刊,2015,39(4):633~640.Yang Jiangping,Shi Yaohong,Zeng Ningfeng et al.Analysis of engineering geological characteristics and specific problems of the offshore area in Beihai,Guangxi[J].Journal of Geology.2015,39(4):633~640.(in Chinese)
[5]刘潇,姬迎春,赵俭斌等.尾矿砂液化特征试验研究[J].工程勘察,2015,43(2):15~24.Liu Xiao,Ji Yingchun,Zhao Jianbin et al.Experimental study on liquefaction characteristics of tailing sands[J].Geotechnical Investigation&Surveying,2015,43(2):15~24.(in Chinese)
[6]亓乐,董丽娜,周志东等.竖向荷载对管桩群桩水平承载特性的影响研究[J].工程勘察,2016,44(8):19~23.Qi Le,Dong Lina,Zhou Zhidong et al.Effects of vertical loads on horizontal bearing behavior of pipe pile group[J].Geotechnical Investigation&Surveying,2016,44(8):19~23.(in Chinese)
[7]刘敏,刘博,年延凯等.线性波加载下海底斜坡失稳机制的数值分析[J].地震工程学报,2015,37(2):415~421.Liu Min,Liu Bo,Nian Yankai et al.Numerical analysis of the failure mechanism of submarine slopes under linear wave loading[J].China Earthquake Engineering Journal,2015,37(2):415~421.(in Chinese)
[8]杨忠年,贾永刚,张琳等.海浪导致粉质土海床破坏过程实验研究[J].中国海洋大学学报,2015,45(5):75~81.Yang Zhongnian,Jia Yonggang,Zhang Lin et al.An experimental study on wave-induced failure process in silty bottom bed[J].Periodical of Ocean University of China,2015,45(5):75~81.(in Chinese)
[9]顾小芸.粘质海底稳定性实例分析[J].工程地质学报,1996,4(1):32~38.Gu Xaoyun.Case study of clayey seabottom stability[J].Journal of Engineering Geology,1996,4(1):32~38.(in Chinese)
[10]中国人民共和国行业标准.港口工程桩基规范(JTS167-4-2012)[S].北京:人民交通出版社,2012.The Professional Standards of the People’s Republic of China.Code for pile foundation of harbor engineering(JTS167-4-2012)[S].Beijing:China Communications Press,2012.
[11]吴梦喜,楼志刚.海波作用下海床的稳定性与液化分析[J].工程力学,2002,19(5):98~102.Wu Mengxi,Lou Zhigang.Stability and liqueafaction analysis of seabed to wave loading[J].Engineering Mechanics,2002,19(5):98~102.(in Chinese)
[2]中华人民共和国国家标准.海洋调查规范第10部分:海底地形地貌调查(GBT 12763.10-2007)[S].北京:中国标准出版社,2008The State Standards of the People's Republic of China.Specification for oceanorgaphic survey—Part 10:Submarine to pography and geomorphology(GBT 12763.10-2007)[S].Beijing:Standards Press of China,2008.(in Chinese)
[3]王超凡,殷红艳,赵永贵.海南石梅湾地区工程地质条件综合研究[J].工程地质学报,2001,9(3):282~285.Wang Chaofan,Yin Hongyan,Zhao Yonggui.Intergrated study on enginering-geological conditions in Shimeiwan area,Hainan[J].Journal of Engineering Geology,2001,9(3):282~285.(in Chinese)
[4]杨江平,石要红,曾宁烽等.广西北海近海工程地质特征及特殊性问题分析[J].地质学刊,2015,39(4):633~640.Yang Jiangping,Shi Yaohong,Zeng Ningfeng et al.Analysis of engineering geological characteristics and specific problems of the offshore area in Beihai,Guangxi[J].Journal of Geology.2015,39(4):633~640.(in Chinese)
[5]刘潇,姬迎春,赵俭斌等.尾矿砂液化特征试验研究[J].工程勘察,2015,43(2):15~24.Liu Xiao,Ji Yingchun,Zhao Jianbin et al.Experimental study on liquefaction characteristics of tailing sands[J].Geotechnical Investigation&Surveying,2015,43(2):15~24.(in Chinese)
[6]亓乐,董丽娜,周志东等.竖向荷载对管桩群桩水平承载特性的影响研究[J].工程勘察,2016,44(8):19~23.Qi Le,Dong Lina,Zhou Zhidong et al.Effects of vertical loads on horizontal bearing behavior of pipe pile group[J].Geotechnical Investigation&Surveying,2016,44(8):19~23.(in Chinese)
[7]刘敏,刘博,年延凯等.线性波加载下海底斜坡失稳机制的数值分析[J].地震工程学报,2015,37(2):415~421.Liu Min,Liu Bo,Nian Yankai et al.Numerical analysis of the failure mechanism of submarine slopes under linear wave loading[J].China Earthquake Engineering Journal,2015,37(2):415~421.(in Chinese)
[8]杨忠年,贾永刚,张琳等.海浪导致粉质土海床破坏过程实验研究[J].中国海洋大学学报,2015,45(5):75~81.Yang Zhongnian,Jia Yonggang,Zhang Lin et al.An experimental study on wave-induced failure process in silty bottom bed[J].Periodical of Ocean University of China,2015,45(5):75~81.(in Chinese)
[9]顾小芸.粘质海底稳定性实例分析[J].工程地质学报,1996,4(1):32~38.Gu Xaoyun.Case study of clayey seabottom stability[J].Journal of Engineering Geology,1996,4(1):32~38.(in Chinese)
[10]中国人民共和国行业标准.港口工程桩基规范(JTS167-4-2012)[S].北京:人民交通出版社,2012.The Professional Standards of the People’s Republic of China.Code for pile foundation of harbor engineering(JTS167-4-2012)[S].Beijing:China Communications Press,2012.
[11]吴梦喜,楼志刚.海波作用下海床的稳定性与液化分析[J].工程力学,2002,19(5):98~102.Wu Mengxi,Lou Zhigang.Stability and liqueafaction analysis of seabed to wave loading[J].Engineering Mechanics,2002,19(5):98~102.(in Chinese)