面波勘探在划分岩体风化带中的应用——以河北赤城公路隧洞勘察为例

Application of Surface Wave Exploration Technique to the Weathering Zone Division of Rock Mass——Taking the Investigation of Chicheng Highway Tunnel Engineering in Hebei as an Example

基于多道瞬态面波勘探技术具有野外工作简便快捷,不受地层速度差异影响,浅层分辨率高,对测试场地条件要求不高等优势,本文以河北赤城公路隧道勘察为例,重点论述了在隧洞岩体构造特征和质量评价中,利用面波勘探方法探测岩体上部覆盖层厚度,划分岩体全风化和中等风化界面,并对沿隧洞轴线上的岩体进行质量评价。论证了面波勘探用于隧道勘察设计和施工过程中的可行性和有效性,为其在隧道工程方面的应用提供了理论和实践依据。

Based on the advantages from the multiple transient surface wave exploration technique such as the simple and convenient field work, no influnence from stratum speed, high resolution of superficial layer and low demands to the testing site conditions, taking the investigation of Chicheng highway tunnel engineering in Hebei as an example, the discussions on the application of the surface wave method to survey the thickness of the upper cover layers in evaluation of the structural features of the rock tunnel and the quality, to divide the contact surfaces with the entire weathering and the medium weathering, and to evaluate the quality of rock mass along the tunnel axis are presented. It is proved the feasibility and effectiveness of the surface wave exploration in the tunnel design and construction, which provides the theoretical and practical foundation for the application in the tunnel projects.