华侨大学学报（自然科学版）
華僑大學學報（自然科學版）
화교대학학보（자연과학판）
JOURNAL OF HUAQIAO UNIVERSITY(NATURAL SCIENCE)
2015年
1期
91-96
,共6页
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
福州地鐵 1 號線%典型軟土%盾構隧道%地層沉降%管片應力%固結效應%數值模擬
복주지철 1 호선%전형연토%순구수도%지층침강%관편응력%고결효응%수치모의
Fuzhou Metro Line 1%typical soft soil%shield tunnel%ground settlement%segment stress%consolidation effect%numerical simulation
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20 m 后，沉降历时800 d 的地层沉降和管片应力符合工程实际，地表最大沉降达18．5 mm，且没有完全收敛．
為研究福州地鐵1號線典型軟土的工程性質及其影響，用電子顯微鏡進行瞭典型軟土試樣的掃描、X射線衍射分析及室內物理力學試驗．基于工程地質條件和施工經驗，就軟土對地層環境影響進行瞭 ABAQUS數值模擬分析．研究結果錶明：該軟土是由含有較大孔隙的微糰聚顆粒組成，不同放大倍數圖像具有一定的自相似特徵，試樣含石英成分，工程性質較差；盾構隧道開挖20 m 後，沉降歷時800 d 的地層沉降和管片應力符閤工程實際，地錶最大沉降達18．5 mm，且沒有完全收斂．
위연구복주지철1호선전형연토적공정성질급기영향，용전자현미경진행료전형연토시양적소묘、X사선연사분석급실내물리역학시험．기우공정지질조건화시공경험，취연토대지층배경영향진행료 ABAQUS수치모의분석．연구결과표명：해연토시유함유교대공극적미단취과립조성，불동방대배수도상구유일정적자상사특정，시양함석영성분，공정성질교차；순구수도개알20 m 후，침강력시800 d 적지층침강화관편응력부합공정실제，지표최대침강체18．5 mm，차몰유완전수렴．
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.
