工程地质学报2017，Vol.25Issue(4)：920-925,6.DOI:10.13544/j.cnki.jeg.2017.04.004
深基坑PCMW工法开挖过程离散元数值模拟分析
ANALYSIS OF DISCRETE ELEMENT NUMERICAL SIMULATION FOR DEEP FOUNDATION PIT EXCAVATION WITH PCMW RETAINING STRUCTURE
摘要
Abstract
The stability of deep foundation pit is an important engineering problem,in which effective supporting structure is the basis of foundation pit engineering.The discrete element method is employed in this paper,and a modeling and numerical simulation method of foundation pit and supporting structure is proposed.A close-packed discrete element model is used to build the model of initial layers,and the clump model of discrete element is used to build pipe piles with smooth surfaces.A deep foundation pit is taken as an example.The geometrical model can be built using the three-dimensional discrete element software MatDEM3D.The mechanical parameters of elements are determined according to the mechanical properties of soil.In numerical simulations,the soil layers are compacted using a pre-balancing operation,after which the deformation of soil and piles are simulated during the excavation process of foundation pit.The numerical simulation results are compared with the measured monitoring data to evaluate the effectiveness of foundation pit support structures.The discrete element numerical simulation method of foundation pit has potential application prospect in the stability prediction of foundation pit excavation process and the evaluation of the effectiveness of supporting structures.关键词
深基坑/离散元/管桩/数值模拟/分布式光纤监测Key words
Deep foundation pit/Discrete element method/Pipe pile/Numerical simulation/Distributed optical fiber monitoring分类
建筑与水利引用本文复制引用
索文斌,刘春,施斌,张晓宇..深基坑PCMW工法开挖过程离散元数值模拟分析[J].工程地质学报,2017,25(4):920-925,6.基金项目
国家自然科学基金项目(41230636,41302216),江苏省自然科学基金青年项目(BK20130377)资助. （41230636,41302216）
