路基分层勘探应力波分析研究
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摘要
传统路基物探勘察主要依靠钻孔取样,对所得试样进行分析,确定地下土层的状态及具体深度。但对地质较复杂的多山地区或需要钻孔深度较深的条件下,钻孔取样成本昂贵,且经常因农田或其他限制原因,无法实现钻探等破坏性勘探工作。有鉴于此,利用应力波测试的便捷手段,结合面波、地震映像等不同测试方法,对路基下部土层具体分层情况开展研究,确定具体分层深度及固定深度范围内土体特性,并将测试数据与钻探结果进行对比分析,验证应力波无损测试方法的可行性。
The traditional method of subgrade geophysical prospecting and exploring was drilling and sampling test. By analyzing the test sample,the state and depth of underground soil layer were confirmed.But the cost of traditional method was expensive in complex geological and mountainous area which needs deeper drilling hole. Besides,the destructive exploration job was often forbidden for the reason of farmland or other restrictive conditions. For this reason,the convenient stress wave test measures were adopted,the methods of surface wave test and image test were combined to study the state of subgrade soil layers. Then the depth of soil layers and the soil characteristics in fixed depth range were confirmed. The stress wave test data were comparatively analyzed with the drilling test results. The feasibility of nondestructive stress wave test was verified. The cost of soil layers exploration will be considerably reduced.
The traditional method of subgrade geophysical prospecting and exploring was drilling and sampling test. By analyzing the test sample,the state and depth of underground soil layer were confirmed.But the cost of traditional method was expensive in complex geological and mountainous area which needs deeper drilling hole. Besides,the destructive exploration job was often forbidden for the reason of farmland or other restrictive conditions. For this reason,the convenient stress wave test measures were adopted,the methods of surface wave test and image test were combined to study the state of subgrade soil layers. Then the depth of soil layers and the soil characteristics in fixed depth range were confirmed. The stress wave test data were comparatively analyzed with the drilling test results. The feasibility of nondestructive stress wave test was verified. The cost of soil layers exploration will be considerably reduced.
引文
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[3]刘盛东,刘静,岳建华.中国矿井物探技术发展现状和关键问题[J].煤矿学报,2014,59(1):19-25.
[4]袁桂琴,熊盛青,孟庆敏,等.地球物理勘查技术与应用研究[J].地质学报,2011,85(11):1744-1805.
[5]占文锋,王强,贺学海.综合物探技术在跨地铁建筑场地路基勘察中的应用[J].施工技术,2015,44(7):55-59.
[6]PURYEAR,CHARLES I,CASTAGNA,et al.Layer-thickness determination and stratigraphic interpretation using spectral inversion:Theory and application[J].Geophysics,2008,381-387.
[7]ZHOU Y F,THAM L G,YAN R W M,et al.The mechanism of soil failures along cracks subjected to water infiltration[J].Computers and geosciences.2013,344-350.
[8]张宇辉,张献民,程国勇.土石混合介质中石料间隙土压实度剪切波速评价研究[J].岩土工程学报,2011,33(6):909-915.
[9]付代光,刘江平,周黎明,等.基于贝叶斯理论的软夹层多模式瑞雷波频散曲线反演研究[J],岩土工程学报,2015,37(2):321-329.
[10]刘远,孙进忠,赵体.强夯地基处理效果的多道瞬态瑞雷波检测[J].地球物理学进展,2014,29(6):32-37.
[11]潘佳铁,吴庆举,李永华,等.华北地区瑞雷面波相速度层析成像[J].地球物理学报,2011,54(1):54-59.
[12]刘振明,刘世奇,唐筱蛑.地震CT结合地震映像法综合物探应用研究[J].铁道工程学报,2014(2):11-14.
[13]肖都.沥青混凝土机场跑道面层脱空探地雷达图像模拟及应用研究[J].物探化探计算技术,2015,37(1):10-15.
[14]何炜琨.基于探地雷达的机场场道质量监测关键技术研究[D].天津:天津大学,2012.
[15]刘宗辉,吴恒,周东.频谱反演法在探地雷达隧道衬砌检测中的应用研究[J].岩土工程学报,2015,37(4):711-717.
[16]黄忠来,张建中.利用探地雷达频谱反演层状介质几何与电性参数[J].地球物理学报.2013,56(4):69-74.