摘要
结合工程实例建立三维数值分析模型,考虑降水过程中土体、邻近管线二者之间的相互作用,模拟基坑降水后的地下水位分布状态以及由于水位降低导致的地下管线不均匀沉降情况;将数值模拟结果和现场实测结果进行对比,验证了数值模拟分析模型及参数的适用性。以地下管线沉降梯度为关键参数,利用Powell优化算法建立管线破坏程度与沉降梯度之间的函数关系,从而能够在降水方案编制阶段预测邻近地下管线的损伤程度。
Based on practical excavation project, the three-dimensional finite element analysis model is established in ABAUQS, considering the interaction between soil and pipeline. The distribution of groundwater level after dewatering and uneven settlement of underground pipeline due to water level decreased are simulated. Then the results of numerical simulation are compared with the measured results, and the feasibility of numerical simulation model and parameters is confirmed. Finally, using Powell optimization algorithm, the pipeline damage rate prediction model is established which can be used to predict the underground pipeline status in dewatering stage.
出处
《建筑科学》
北大核心
2014年第7期74-79,共6页
Building Science
基金
郑州市科技领军人才项目资助(项目编号:112PLJRC353)
关键词
土木建筑工程施工
基坑降水
地下管线
数值分析
沉降梯度
civil engineering construction
dewatering
underground pipeline
numerical analysis
settlement gradient
