鞠兴华,刘禹阳

• 1:潍坊学院建筑工程学院
• 2:潍坊学院海洋岩土工程中心
• 3:长安大学建筑工程学院

摘要(Abstract)：

为保证基坑预警结果的准确性和有效性,在基坑预警准则构建的基础上,利用累计变形判据和变形速率判据实现了多元监测信息融合的基坑预警研究。其中:累计变形判据包含稳定性指标和相对变形指标,即从基坑稳定性和变形安全储备角度实现了基坑长时段预警分析;而变形速率判据包含了绝对量指标和发展趋势指标,即从变形速率的现有变形绝对量及其发展趋势角度实现了基坑短时段预警分析。实例分析表明:不同判据在不同监测项目中的预警等级具有一定的差异,在累计变形判据的预警结果中,得出基坑处于稳定状态,预警等级为Ⅱ级;而在变形速率判据的预警结果中,坑顶变形监测项目的预警等级为Ⅲ级,其余监测项目的预警等级为Ⅱ级;按不利原则,对两类判据的预警结果进行叠加,综合确定基坑预警等级为Ⅲ级,即应采取密切监测措施,切实保证施工安全。

关键词(KeyWords)： 地铁基坑;预警准则;稳定性评价;预警等级;尖点突变分析

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51908051);; 潍坊学院博士科研基金项目(2020BS31)

作者(Author): 鞠兴华,刘禹阳

DOI: 10.13928/j.cnki.wrahe.2021.01.013

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