摘要
为研究福州地铁1号线典型软土的工程性质及其影响,用电子显微镜进行了典型软土试样的扫描、X射线衍射分析及室内物理力学试验.基于工程地质条件和施工经验,就软土对地层环境影响进行了ABAQUS数值模拟分析.研究结果表明:该软土是由含有较大孔隙的微团聚颗粒组成,不同放大倍数图像具有一定的自相似特征,试样含石英成分,工程性质较差;盾构隧道开挖20m后,沉降历时800d的地层沉降和管片应力符合工程实际,地表最大沉降达18.5mm,且没有完全收敛.
To investigate the engineering properties of typical soft soil at Fuzhou Metro Line 1 and its influence to envi-ronment,some tests were conducted,such as the scanning electron microscope,X-ray diffraction analysis,physical and mechanical experiments,respectively.Based on the engineering geology and construction parameters,the ABAQUS nu-merical simulation analysis about soft soil influence to environment was presented.The results show that：the soft soil consists of voids and micro soil aggregates,and there exist the self-similar characteristic among the samples with different magnifications.The soft soil contains quartz crystal,with poor engineering properties.The calculation ground settlement and tunnel segments stress after 20 m excavation and 800 d consolidation agree with the similar engineering surveyed re-sults.The max settlement of ground surface is 18.5 mm,which is not completely converged.
出处
《华侨大学学报（自然科学版）》
CAS
北大核心
2015年第1期91-96,共6页
Journal of Huaqiao University(Natural Science)
基金
福建省科技计划重点项目(2012Y0062)
福建省高等学校学科带头人培养计划项目(FETU)
国家级大学生创新创业训练计划项目(201311311007)
关键词
福州地铁1号线
典型软土
盾构隧道
地层沉降
管片应力
固结效应
数值模拟
Fuzhou Metro Line 1
typical soft soil
shield tunnel
ground settlement
segment stress
consolidationeffect
numerical simulation
