张晓平, 谢维强, 梁峻海, 杨信美, 陈鹏, 陆东生, 涂新斌. 2017: 致密砂土工程地质特性及其对盾构施工的影响. 工程地质学报, 25(s1): 90-96. DOI: 10.13544/j.cnki.jeg.2017.s1.014
    引用本文: 张晓平, 谢维强, 梁峻海, 杨信美, 陈鹏, 陆东生, 涂新斌. 2017: 致密砂土工程地质特性及其对盾构施工的影响. 工程地质学报, 25(s1): 90-96. DOI: 10.13544/j.cnki.jeg.2017.s1.014
    ZHANG Xiaoping, XIE Weiqiang, LIANG Junhai, YANG Xinmei, CHEN Peng, LU Dongsheng, TU Xinbin. 2017: ENGINEERING GEOLOGICAL CHARACTERISTICS OF DENSE SAND AND ITS INFLUENCE ON SHIELD TUNNELLING. JOURNAL OF ENGINEERING GEOLOGY, 25(s1): 90-96. DOI: 10.13544/j.cnki.jeg.2017.s1.014
    Citation: ZHANG Xiaoping, XIE Weiqiang, LIANG Junhai, YANG Xinmei, CHEN Peng, LU Dongsheng, TU Xinbin. 2017: ENGINEERING GEOLOGICAL CHARACTERISTICS OF DENSE SAND AND ITS INFLUENCE ON SHIELD TUNNELLING. JOURNAL OF ENGINEERING GEOLOGY, 25(s1): 90-96. DOI: 10.13544/j.cnki.jeg.2017.s1.014

    致密砂土工程地质特性及其对盾构施工的影响

    ENGINEERING GEOLOGICAL CHARACTERISTICS OF DENSE SAND AND ITS INFLUENCE ON SHIELD TUNNELLING

    • 摘要: 盾构施工以其高效的施工特点在现代地下工程施工中愈来愈受欢迎,而其穿越的地质条件也愈来愈复杂。致密砂土作为一种特殊的地质环境,直接影响到盾构施工,目前为止,对于致密砂土的特性研究尚未达到成熟阶段。试验采用便携式拍照显微镜获取苏通GIL综合管廊工程原状土图片:利用Adobe Photoshop拼接,并对其进行黑白二值化处理获取颗粒轮廓;最后通过image-Pro plus程序统计分析得到颗粒形状参数;并将试验结果与苏通GIL综合管廊工程勘察结果进行比对。试验结果表明:该方法可作为一种统计分析致密砂土颗粒形状的有效方法;致密砂土在空间呈长轴分布,且与颗粒的形状参数有良好的相关性。试验结果对颗粒形状研究有参考价值,对苏通综合管廊工程盾构施工有指导意义。

       

      Abstract: Shield tunnelling is more and more popular in the modern underground projects because of its high efficiency, and its geological condition is more and more complicated. As a special geological environment, dense sand has a direct impact on shield tunnelling. But so far, the study on the characteristics of dense sand has not yet reached the mature stage. In this paper, portable digital microscope was employed to capture images of undisturbed sand which comes from Sutong GIL Utility Tunnel Engineering; Adobe Photoshop splicing, the spliced image were subsequently converted into binary picture to produce contour boundary for particle shape; finally image-Pro plus was used to count and analyze particle shape parameters; the test results and the Sutong GIL Utility Tunnel Engineering survey results were compared. It is concluded that the method can be used as an effective means to accomplish the dense sand particle shape quantification and the dense sand has a long axis distribution in the space, which has a good correlation with the shape parameters of the particles. The results of the study have reference value for the study of particle shape, and have guiding significance for the construction of shield tunnel.

       

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