利用地震映像技术确定地基覆盖层厚度研究
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摘要
地基覆盖层厚度在山区新建公路设计施工中具有重要意义。无法通过钻探获得足够地层资料的情况下,利用高密度地震映像结合瞬态Rayleigh面波对某新建高速公路桥梁的地基基岩埋深进行了勘察,通过现场采集、数据处理和成果解译,确定了待测场地基岩面埋深以及起伏情况,得到了地层剖面。为桥梁选型和初步设计提供了参考依据。通过后期施工勘察阶段的钻探验证,确定的基岩面位置基本准确,能够满足设计要求,达到了较好的工程效果。
The overburden thickness of roadbed is of great significance in the design and construction of the new mountain highways. Under the condition of hard to gain the sufficient stratum information by drilling, the high density seismic image technology combined with the transient Rayleigh surface wave is used to survey the bedrock buried depth of a newly built expressway bridge. The undulate status and the bedrock buried depth of the untested field bedrock are determined through the field collection, data processing and achievement interpretation in order to gain the stratum section and provide the reference data for the bridge type selection and the preliminary design. According to the last stage of construction survey and drilling validation, the determined bedrock position is basically exact, can satisfy the design requirements and achieve the better engineering effect.
The overburden thickness of roadbed is of great significance in the design and construction of the new mountain highways. Under the condition of hard to gain the sufficient stratum information by drilling, the high density seismic image technology combined with the transient Rayleigh surface wave is used to survey the bedrock buried depth of a newly built expressway bridge. The undulate status and the bedrock buried depth of the untested field bedrock are determined through the field collection, data processing and achievement interpretation in order to gain the stratum section and provide the reference data for the bridge type selection and the preliminary design. According to the last stage of construction survey and drilling validation, the determined bedrock position is basically exact, can satisfy the design requirements and achieve the better engineering effect.
引文
[1]GB50011—2010,建筑抗震设计规范[S].
[2]GB50021—2001,岩土工程勘察规范[S].
[3]中国水利电力物探科技信息网.工程物探手册[M].北京:中国水利水电出版社,2011.
[4]吕耀志,谭儒蛟,徐鹏逍,等.瞬态瑞雷面波技术在人工填土勘察中的应用[J].工程勘察,2014(1):87-90.
[5]李杰生,钱春宇,廖红建.多道瞬态面波法在铁路路基测试中的应用[J].岩土力学,2003(24):611-615.
[2]GB50021—2001,岩土工程勘察规范[S].
[3]中国水利电力物探科技信息网.工程物探手册[M].北京:中国水利水电出版社,2011.
[4]吕耀志,谭儒蛟,徐鹏逍,等.瞬态瑞雷面波技术在人工填土勘察中的应用[J].工程勘察,2014(1):87-90.
[5]李杰生,钱春宇,廖红建.多道瞬态面波法在铁路路基测试中的应用[J].岩土力学,2003(24):611-615.
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