摘要
根据勘探钻孔获得的岩土层工程地质性质及分布赋存状况绘制的工程地质剖面图,具有相当大的人为随意性,由此会导致地基处理和基础设计的某种盲目性。建筑场地勘探点布置一般成比较标准的正交网格状分布,这正是克里格法对样品点分布与插值估计点分布的基本要求。克里格法可以给出直观的图形定性结果,例如某目的岩土层的三维块体图;同时,也能够给出理论分析定量结果,即相应目的层的试验变异函数曲线及其理论拟合曲线、理论变异函数模型及其各相关参数。因此,可使单纯依据勘探钻孔获得的定性成果进化为科学的定量成果,保证科学优化设计、精确预算、合理施工。目前还只能将克里格法作为岩土工程勘察成果分析的一种辅助手段,采用该方法可减少或避免随意性与盲目性,检验岩土工程勘察成果,从地基处理和基础设计角度看,为确保建筑物的安全和纠正工程造价预算偏差,该方法可为岩土工程勘察规范制定提供参考依据。
Artificial uncertainties in plotting geological cross-sections based on engineering geological properties and data from exploratory holes may lead to ambiguities in subgrade treatment and foundation design. Application of Kriging mechod, an unbiased and least error optimum reserve estimation method, could reduce or avoid such ambiguity. Using this method, both the intuitional qualitative results, such as the 3-D block diagram of the target layer, and the theoretical quantitative results, such as the experimental variogram of the layer, the theoretical fitting curve, and the theoretical variogram model and related parameters, can be obtained. Therefore, application of the Kriging method in geotechnical engineering exploration, subgrade treatment and foundation design can assist one to realize optimum design, accurate estimation and rational construction organization. So far, Kriging method is employed just an aid to analyzing and verifying the data of geotechnical engineering exploration to avoid randomness and ambiguity. Thus, it is necessary to incorporate the Kriging method into the code for geotechnical engineering investigation, also to insure the safety of buildings and rational budget of subgrade treatment and foundation design.
出处
《土木工程学报》
EI
CSCD
北大核心
2006年第4期82-86,共5页
China Civil Engineering Journal
关键词
岩土工程勘察
地基处理与基础设计
克里格法
辅助手段
geotechnical engineering exploration
subgrade treatment
foundation design
Kriging method
