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琼州海峡西线跨海通道工程地质评价

李振 彭华 马秀敏 姜景捷 孙尧 李龙飞

李振, 彭华, 马秀敏, 等, 2019. 琼州海峡西线跨海通道工程地质评价. 地质力学学报, 25 (6): 1150-1156. DOI: 10.12090/j.issn.1006-6616.2019.25.06.098
引用本文: 李振, 彭华, 马秀敏, 等, 2019. 琼州海峡西线跨海通道工程地质评价. 地质力学学报, 25 (6): 1150-1156. DOI: 10.12090/j.issn.1006-6616.2019.25.06.098
LI Zhen, PENG Hua, MA Xiumin, et al., 2019. ENGINEERING GEOLOGICAL EVALUATION ON THE WEST LINE OF THE CROSS-SEA CHANNEL IN THE QIONGZHOU STRAIT. Journal of Geomechanics, 25 (6): 1150-1156. DOI: 10.12090/j.issn.1006-6616.2019.25.06.098
Citation: LI Zhen, PENG Hua, MA Xiumin, et al., 2019. ENGINEERING GEOLOGICAL EVALUATION ON THE WEST LINE OF THE CROSS-SEA CHANNEL IN THE QIONGZHOU STRAIT. Journal of Geomechanics, 25 (6): 1150-1156. DOI: 10.12090/j.issn.1006-6616.2019.25.06.098

琼州海峡西线跨海通道工程地质评价

doi: 10.12090/j.issn.1006-6616.2019.25.06.098
基金项目: 

海洋基础性公益性地质调查项目 DD20160149

详细信息
    作者简介:

    李振(1984-), 男, 助理研究员, 从事海洋地球物理、地应力、地应力测量与监测方面的研究工作。E-mail:lizhen05400209@163.com

    通讯作者:

    李龙飞(1993-), 男, 在读硕士, 从事海洋地球物理、地应力、地应力测量方面的研究工作。E-mail:864865193@qq.com

  • 中图分类号: P642

ENGINEERING GEOLOGICAL EVALUATION ON THE WEST LINE OF THE CROSS-SEA CHANNEL IN THE QIONGZHOU STRAIT

  • 摘要: 为开展琼州海峡跨海通道地壳稳定性评价,避免潜在的地质灾害对跨海通道工程安全性产生不利影响,利用侧扫声纳、单道地震、多波束等地球物理探测方法对琼州海峡海底展开了地形地貌调查,获得了琼州海峡跨海通道工程区海域活动断层分布、西线规划区地形地貌及地质条件等基础地质资料。工程地质评价认为西线线路断裂、地震、火山活动性弱,海底水深小、地形较为平坦、地貌简单,上新世望楼港组低液限粘土及上新世浅海相砂层作为基础持力层,岩土工程力学性质尚可,利于开展跨海通道桥梁方案施工。规划线路穿越1处侵蚀沟槽,影响长度约5 km,地形高差达60 m,且线路东临1处海釜,分布有陡坎,且部分地段分布有滑塌堆积。建议西线线路北段局部西移约1.5 km,同时关注西口潮流侵蚀沟槽、规划区南部淤泥质软土、古河道砂性土沉积、海峡谷底活动沙坡等不良地质作用影响。

     

  • 图  1  琼州海峡地理位置及琼州海峡活动断裂与地震分布图(据文献[10-12]有修改)

    Figure  1.  The geographical location, active faults and seismic distribution map of the Qiongzhou Strait (modified after references [10-12])

    图  2  琼州海峡西线规划区图

    Figure  2.  The planning area of the West Line in the Qiongzhou Strait

    图  3  琼州海峡西线地层剖面

    Figure  3.  The stratigraphic section of the West Line in the Qiongzhou Strait

    图  4  灯楼角外海滑塌堆积

    Figure  4.  The slump deposits in Dengjiaolou open sea

    图  5  测线Z6古河道顺层滑塌堆积现象

    Figure  5.  The slippage in the ancient channel of line Z6

    表  1  琼州海峡跨海通道前期规划路线方案统计表

    Table  1.   Statistics of the preliminary route plans for the cross-sea channel in the Qiongzhou Strait

    编号 线路 长度/km 最大水深/m 存在问题
    Ⅰ线 雷州赤坎—海南白沙角 28 75 海底地形复杂,水深大,受地震和断裂的影响
    Ⅱ线 雷州排尾角—海南白沙角 19.7 86 海底地形复杂,水深大,不能避开海峡中的深槽
    Ⅲ线 雷州海安港—海南白沙角 25.5 80 海底地形复杂,海峡中有隆起,隆起处水深30~40 m
    Ⅳ线 雷州三塘—海南新海 19.7 105 海底地形复杂,水深大,海底铺设有海底通讯电缆,为禁止抛锚和捕捞区
    Ⅴ线 雷州三塘—海南的天尾 20.3 88 海底地形复杂,水深大,受地震和断裂的影响,南岸有陡坎,优选方案之一。
    Ⅵ线 雷州灯楼角—海南玉包角 26.3 60 海底地形复杂,北侧经过一深槽,水深约80 m
    Ⅶ线(西线) 雷州灯楼角—海南红牌咀 31.8 40 海底较为平坦,平均水深约40 m,但跨海工程长,必须绕避徐闻珊瑚礁国家级自然保护区的核心区。优选方案之一
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出版历程
  • 收稿日期:  2019-02-14
  • 修回日期:  2019-07-09
  • 刊出日期:  2019-12-31

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