文明征, 王振豪, 张博文, 张少同, 贾永刚. 2018: 黄河水下三角洲浮泥层分布与扰动地层调查研究. 工程地质学报, 26(s1): 677-683. DOI: 10.13544/j.cnki.jeg.2018225
    引用本文: 文明征, 王振豪, 张博文, 张少同, 贾永刚. 2018: 黄河水下三角洲浮泥层分布与扰动地层调查研究. 工程地质学报, 26(s1): 677-683. DOI: 10.13544/j.cnki.jeg.2018225
    WEN Mingzheng, WANG Zhenhao, ZHANG Bowen, ZHANG Shaotong, JIA Yonggang. 2018: SURVEY ON THE DISTRIBUTION OF FLUID MUD AND DISTURBED STRATA ON SUBAQUEOUS YELLOW RIVER DELTA. JOURNAL OF ENGINEERING GEOLOGY, 26(s1): 677-683. DOI: 10.13544/j.cnki.jeg.2018225
    Citation: WEN Mingzheng, WANG Zhenhao, ZHANG Bowen, ZHANG Shaotong, JIA Yonggang. 2018: SURVEY ON THE DISTRIBUTION OF FLUID MUD AND DISTURBED STRATA ON SUBAQUEOUS YELLOW RIVER DELTA. JOURNAL OF ENGINEERING GEOLOGY, 26(s1): 677-683. DOI: 10.13544/j.cnki.jeg.2018225

    黄河水下三角洲浮泥层分布与扰动地层调查研究

    SURVEY ON THE DISTRIBUTION OF FLUID MUD AND DISTURBED STRATA ON SUBAQUEOUS YELLOW RIVER DELTA

    • 摘要: 通过浅地层剖面、双频测深等声学探测仪器,对黄河水下三角洲埕岛海域浮泥层分布及扰动地层发育情况进行调查研究。双频测深调查资料显示:研究区内浮泥层分布广泛,浮泥层平均厚度10cm左右。浮泥层的分布受地形的影响较大,地势平坦区浮泥层分布相对均匀且厚度较厚;地形起伏较大的区域,浮泥层呈块状分布于低洼区。浅地层剖面探测资料显示,黄河水下三角洲扰动地层多分布于浅表层5m深度以内,其地层结构与周围未扰动地层具有明显的差异,便于识别。与2003年浅地层探测资料对比发现,扰动地层在空间分布上进一步发育。此外,本文结合已有的现场调查和室内水槽实验研究,进一步阐明扰动地层在风暴浪作用下的形成过程。认为风暴浪循环荷载下,海床浅表地层局部发生扰动并逐渐向周边扩展,地层扰动过程中细颗粒物质析出、沉积物含水率下降、密实度增加,导致扰动地层强度高于周边地层;扰动地层形成初期与侵蚀负地形相伴生,形成塌陷凹坑,此后长时间水动力下的差异侵蚀,使原来扰动地层处的负地形逐渐发育为正地形。

       

      Abstract: From the acoustical exploring data of Sub-bottom profiler and Echo Sounder, it is found that fluid mud layer and partial disturbed strata existed in the subaqueous Yellow River Delta. The fluid mud is widely distributed in the study area, and the average thickness of the fluid mud is about 10cm. The distribution of fluid mud is relatively uniform and thicker in the flat area than terrain undulating area, and the fluid mud is in a spot distribution in low-lying areas. The disturbed strata is easy to identify according to the acoustical exploring data of superficial strata, due to difference from the ambient undisturbed strata in many aspects. The initial disturbed strata further expended in the space compared with the results of acoustical exploring data in 2003. This paper further illustrates the formation mechanism of disturbed strata under the storm waves based on the achievements of researches. The disturbed strata formed under the action of storm waves accompanied by negative topography. However, the long-time differential erosion under the hydrodynamic action of disturbed and undisturbed strata caused the disturbed negative topography switch to positive topography.

       

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