应松, 李苍松. 2007: 某大桥工程桩孔底部岩溶地质探测. 工程地质学报, 15(S1): 613-617.
    引用本文: 应松, 李苍松. 2007: 某大桥工程桩孔底部岩溶地质探测. 工程地质学报, 15(S1): 613-617.
    YING Song, LI Cangsong. 2007: KARST GEOLOGY SERVEY OF BRIDGE FOUNDATION PILES' BOTTOM. JOURNAL OF ENGINEERING GEOLOGY, 15(S1): 613-617.
    Citation: YING Song, LI Cangsong. 2007: KARST GEOLOGY SERVEY OF BRIDGE FOUNDATION PILES' BOTTOM. JOURNAL OF ENGINEERING GEOLOGY, 15(S1): 613-617.

    某大桥工程桩孔底部岩溶地质探测

    KARST GEOLOGY SERVEY OF BRIDGE FOUNDATION PILES' BOTTOM

    • 摘要: 根据某大桥东索塔基桩底部岩溶探测的需要,选择采用"以电磁波反射法为主、配合高密度电法和声波反射法的综合物探技术"实施本工程各桩底岩溶地质探测。详细介绍了3种方法的探测原理、过程及综合分析结果。测试分析认为桩底以下0~30m深度范围内,岩体总体上相对较完整,仅局部地段岩体相对较破碎,多存在沿层面及节理面充填的粘土或软泥夹层,不存在大型~特大型岩溶空洞。经钻探和物探验证,测试结果与实际地质情况相符,表明本综合探测技术可以在同类工程岩溶探测中推广应用。

       

      Abstract: According to demand of karst geology survey of foundation piles' bottom at a bridge's east suspension tower, the synthesis survey technology was adopted to karst geology survey of each foundation piles' bottom for the engineering, in which electromagnetic wave reflection method was the main method, fitted with high density electrical method and acoustic wave reflection method. It was introduced in detail with survey principle and process and effects of synthesis analysis of the three methods. According to the analysis of survey, rock was relatively more complete in 30 meters depth in total, only partial area was relatively fractured, some clay blanket and soft mud interlayer were filled between joint planes, no large-scale or greatly large-scale karst cavities existed. Proved by drilling and brazing, survey effect was agreement with real geology condition. It was indicated that the synthesis survey technology could be extended to karst geology survey for other same engineering.

       

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