A big indirect data – Informed probabilistic method for three-dimensional site reconstruction

IF 6.9 1区 工程技术 Q1 ENGINEERING, GEOLOGICAL
Zhiyong Yang , Xueyou Li , Xiaohui Qi , Zhijun Liu
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引用次数: 0

Abstract

Three-dimensional (3D) reconstruction of a sparse measurement site is of paramount significance for the safety assessments or designing of the geotechnical structures. However, this task is often challenging because the site investigation data generally are sparse due to the limit budget, leading to large statistical uncertainties in the soil parameters. The challenge is further exacerbated by computational issues such as inversion or decomposition of the large correlation matrix, which frequently arises when dealing with large-scale 3D sites. To address these challenges, this paper proposes a novel big indirect data-informed three-dimensional site reconstruction method using hybrid Bayesian theory. The proposed method first constructs the probability distribution functions (PDFs) of the soil parameters of the big indirect data collected from worldwide historical sites and the soil parameters of the targeted site using the Gibbs sampler. The two PDFs are then integrated to form a hybrid PDF of the target site. Based on the hybrid PDF, the three-dimensional site is reconstructed with consideration of spatial variabilities of the soil parameters using multiple multivariate conditional random fields. The Kronecker product is utilized to decompose the large autocorrelation matrix into several small matrices that can be easily handled. A virtual site and a real site in Huizhou, China are employed to demonstrate the capability of the proposed method. The results show that the proposed method can effectively reduce the statistical uncertainty of soil parameters caused by sparse measurement. It offers a transformative tool that utilizes generic geotechnical big indirect data to supplement sparse local data, enabling effective 3D site construction.
三维场地重建的大数据间接概率方法
稀疏测点的三维重建对土工结构的安全评价或设计具有至关重要的意义。然而,由于预算的限制,现场调查数据通常是稀疏的,导致土壤参数的统计不确定性很大,这一任务往往具有挑战性。在处理大型3D站点时,经常出现的大型相关矩阵的反演或分解等计算问题进一步加剧了这一挑战。为了解决这些问题,本文提出了一种基于混合贝叶斯理论的大数据间接三维遗址重建方法。该方法首先利用Gibbs采样器构建了世界范围内遗址土壤参数与目标遗址土壤参数的概率分布函数(pdf)。然后将这两个PDF整合成目标站点的混合PDF。在混合PDF的基础上,利用多个多变量条件随机场,考虑土壤参数的空间变异性,重建了三维场地。利用克罗内克积将大的自相关矩阵分解成几个易于处理的小矩阵。以中国惠州的一个虚拟站点和一个真实站点为例,验证了该方法的有效性。结果表明,该方法能有效降低稀疏测量引起的土壤参数统计不确定性。它提供了一种变革性的工具,利用通用的岩土大间接数据来补充稀疏的本地数据,从而实现有效的3D站点建设。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Engineering Geology
Engineering Geology 地学-地球科学综合
CiteScore
13.70
自引率
12.20%
发文量
327
审稿时长
5.6 months
期刊介绍: Engineering Geology, an international interdisciplinary journal, serves as a bridge between earth sciences and engineering, focusing on geological and geotechnical engineering. It welcomes studies with relevance to engineering, environmental concerns, and safety, catering to engineering geologists with backgrounds in geology or civil/mining engineering. Topics include applied geomorphology, structural geology, geophysics, geochemistry, environmental geology, hydrogeology, land use planning, natural hazards, remote sensing, soil and rock mechanics, and applied geotechnical engineering. The journal provides a platform for research at the intersection of geology and engineering disciplines.
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