摘要
依托武汉地铁11号线光谷四站—光谷五站工程区间,研究盾构施工参数的选取对隧道开挖附近的地表沉降及土体变形的影响,并提出相应控制措施。盾构掘进中,围岩压力的变化、土体的松动程度、注浆质量的变化及盾尾间隙的选取等都会对地表变形产生影响。采用Abaqus有限元软件对该工程典型掘进段进行精细化仿真,得到沉降模拟值,并运用三维Peck公式得出沉降计算值,最后与施工过程中典型监测点的沉降监测值进行对比,总结施工参数对地表沉降的影响规律,为施工过程中的地表变形预测与控制提供理论支撑。结果表明,围岩条件、土体卸荷程度和注浆质量对地表沉降的影响较大,盾尾间隙对地表沉降的影响较弱;典型监测点的变形规律与数值模拟规律更为接近,说明数值模拟预测与仿真分析的合理性与适用性。
Based on an engineering interval on Wuhan metro Line11,the impact of construction parameters on ground settlement and soil deformation is analyzed,corresponding control measures are put forward.In tunnel shielding,changes of rock pressure,soil loosening,grouting quality and gap selection of the shield tails will directly influence the ground settlement.In this paper,the finite element software Abaqus is used to simulate the process of tunneling and obtain the settlement simulation values,the3D Peck formula is used to obtain the settlement calculation value,which is compared with the monitored data at typical monitoring points to summarize the influence law of construction parameters on the surface subsidence,and provide theoretical support for ground settlement prediction and control.The research result shows that the deformation rules of typical monitoring points are very close to the simulated data,indicating the rationality and applicability of the numerical simulation prediction and simulation analysis.
作者
杨圆
付海军
张社荣
霍恒炎
YANG Yuan;FU Haijun;ZHANG Sherong;HUO Hengyan(SINOHYDRO Bureau 14 Co.,Ltd.,650041,Kunming,China)
出处
《城市轨道交通研究》
北大核心
2018年第12期61-66,共6页
Urban Mass Transit
基金
国家自然科学基金创新研究群体科学基金(51509182)
关键词
盾构施工参数
地表沉降
数值模拟
控制措施
construction parameter
surface subsidence
numerical simulation
control measure
