Optimization of Site-exploration Programs in Slope Designs Using 3D Conditional Random Fields

Jia-Yi Ou-Yang; Yong Liu; Guan Chen

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Optimization of Site-exploration Programs in Slope Designs Using 3D Conditional Random Fields

机译：基于三维条件随机场的边坡设计场地勘探方案优化

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Background: In situ soil properties exhibit inherent spatial variability, which is often described by a 3D random field. Soil properties at particular portions are available by site investigation. Wider site investigation scope provides a more accurate description of the geologic profile. However, limited by budget, choosing an effective site exploration scope is of significance. Objective: This study introduces a framework to determine the optimal site investigation strategy in the 3D domain, which yields the lowest mean risk of slope designs. Methods: The mean risk of slope designs is considered to be a function of the costs of site investigation, under-design, and over-design. The unconditional random fields are generated by the spectral representation method initially. Subsequently, the sampled data are incorporated into the random fields via the Kriging algorithm, and the conditional random fields are simulated. A 3D undrained slope is evaluated for illustration. Results: The effects of sampling locations and spacing on the risk of slope designs are examined. The results indicate that the optimal sampling location is close to the zone where slope failure may occur. Moreover, there exists an optimal sampling spacing that minimizes the mean risk of slope designs. Conclusion: This investigation can provide guidance for determining the optimal site exploration programs on the 3D domain with knowledge of the associated risks.

机译：背景:原位土壤特性展览固有的空间变异性,这通常是描述了一个3 d随机领域。在网站是可用的特定部分调查。提供了一个更准确的描述地质剖面。选择一个有效的现场踏勘范围的意义。一个框架来确定最优的网站在3 d领域的调查策略,收益率最低的平均坡度设计的风险。方法:平均坡度设计的风险被认为是一个函数的成本调查,在设计和过多的。无条件的随机生成的字段最初的谱描述方法。随后,抽样数据合并通过克里格算法的随机领域,和条件随机域是模拟的。评估3 d不排水坡度插图。位置和间距对斜率的风险设计审查。最优采样位置接近区域可能发生滑坡。存在一个最优的采样间隔最小化平均坡度设计的风险。结论:本调查可以提供指导确定最优站点勘探项目在3 d域了解相关的风险。

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《Current Chinese Science.》 |2022年第6期|450-459|共10页
作者
Jia-Yi Ou-Yang; Yong Liu; Guan Chen;
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State Key Laboratory of Water Resources and Hydropower Engineering Science, Institute of;

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正文语种英语
中图分类自然科学总论;
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Optimization of Site-exploration Programs in Slope Designs Using 3D Conditional Random Fields

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