| 姜 雄,郑贤舟.大小鱼山地基土随机场统计特征及可靠性分析[J].水运工程,2021,(5):16-21 |
| 大小鱼山地基土随机场统计特征及可靠性分析 |
| Random field statistical characteristics and reliability analysis of foundation soil in Dayushan and Xiaoyushan |
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| DOI： |
| 中文关键词: 随机场 相关距离 方差折减函数 可靠度分析 |
| 英文关键词:random field correlation distance reduction function of variance reliability analysis |
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| 中文摘要: |
| 针对传统可靠度设计方法在地基可靠度分析中算得的可靠度指标过小、失效概率过大的问题，将随机场理论应用于地基可靠度分析。结合鱼山地区围垦促淤过程中获得的大量地勘资料，基于随机场理论讨论采用改进的递推空间法确定土层相关距离的合理性，统计出该地区典型土层土性指标的相关距离及方差折减函数值，并将其应用于岸坡稳定的可靠度分析。结果表明：随机场理论应用于地基土的可靠度分析具有重要的应用和推广价值，采用改进的递推空间法更易确定土性指标的相关距离值，地基土强度指标黏聚力、内摩擦角经方差折减后得到的岸坡可靠性指标更符合工程实际的安全程度。 |
| 英文摘要: |
| Aiming at the problem that the reliability index calculated by the traditional reliability design method in the foundation reliability analysis is undersized and the failure probability is oversized，we apply the random field theory to the foundation reliability analysis. Combining with a large number of geological exploration data obtained in the process of building the green petrochemical base in the Yushan area，we discuss the rationality of determining the correlation distance of soil layer by improved recursive space method based on random field theory，count the correlation distance and variance reduction function value of the typical soil layer in this area，and apply it to the reliability analysis of slope stability. The results show that the application of random field theory to the analysis of foundation reliability has an important promotional value. The improved recursive space method is easier to determine the correlation distance value of soil property indexes，and the reliability index obtained by variance reduction of foundation soil strength indexes cohesive force and friction angle is more in line with the safety degree of engineering practice. |
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