摘要
隧道岩性空间分布通常具有较大的变异性。依据有限的实测勘察数据,传统地质统计学方法通常难以考虑岩性空间分布的局部奇异性,且难以将三维岩性分布模拟结果直接用于数值分析。据此提出一种面向隧道数值分析的岩性空间分布模拟方法。该方法面向隧道数值分析,免去了传统的三维地质模型向数值模型转换的过程;能够充分利用施工阶段获取的岩性信息,再现岩性分布的局部奇异性;还能够灵活地调整岩性分析的尺度,从而满足不同分析精度和分析效率的需要。工程实际应用表明,该方法能更好地利用钻孔勘察数据、地质剖面数据和施工阶段岩性数据,获得更准确的岩性空间分布结果。
The spatial distribution of tunnel lithology usually has a large variability.Based on the limited investigation data,the traditional geostatistics are usually difficult to consider the local singularity of the spatial distribution of lithology,and it is difficult to directly use the simulation results of three-dimensional distribution of lithology for numerical analysis.Therefore,a simulation method of lithology spatial distribution for tunnel numerical analysis is proposed.This method is oriented to the numerical analysis of tunnel,which avoids the process of transformation from the traditional 3 D geological model to the numerical model;it can make full use of the lithologic information obtained in the construction stage,reproduce the local singularity of lithologic distribution;it can also flexibly adjust the scale of lithologic analysis,so as to meet the needs of different analysis accuracy and analysis efficiency.The practical engineering application shows that the method can make better use of borehole data,geological profile data and lithologic data in construction stage,and obtain more accurate lithologic spatial distribution results.
作者
李晓军
李彦东
王长虹
陈子扬
Li Xiaojun;Li Yandong;Wang Changhong;Chen Ziyang(Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China;Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;Department of Civil Engineering,Shanghai University,Shanghai 200444,China)
出处
《工程勘察》
2020年第5期1-5,共5页
Geotechnical Investigation & Surveying
基金
国家自然科学基金项目(41877246)
同济大学短期出国访学基金(2018020024)。
