Theoretical model of shield behavior during excavation. II: Application
Theoretical model of shield behavior during excavation. II: Application
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DOI：
10.1061/(asce)1090-0241(2002)128:2(156
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发表时间：
2002-02-01
影响因子：
3.9
通讯作者：
Kayukawa, K
中科院分区：
文献类型：
--
作者：
Sramoon, A;Sugimoto, M;Kayukawa, K
将作用在盾构上的荷载模型应用于盾构掘进工程中，对盾构的性能进行了模拟。采用全砂砾石层土压平衡盾构进行盾构掘进，观测数据由实时测量数据系统获取。为了避免数据的误差，在处理仿真之前对测量数据进行滤波处理。从二维有限元分析、反向分析和经验值中仔细确定了输入地的性质。仿真结果与实测数据进行了比较，验证了模型的性能。结果表明：(1)为了模拟盾构的实际行为，需要考虑盾构面和盾冠处局部塌方引起的地面松动；(2)丝刷变形产生的力影响屏蔽姿态；(3)模拟结果与观测数据吻合较好。
Simulation of the shield behavior is carried out by applying the model of the loads acting on the shield to the shield tunneling work. The shield tunneling was carried out using an earth pressure balanced shield in sandy gravel layer entirely and the observed data were obtained by the real time measuring data system. To escape the errors of data, the filtering process is applied to the measured data prior to processing the simulation. The input ground properties are carefully determined from the two-dimensional finite element analysis, reverse analysis, and empirical values. The simulation results are compared with the observed data to verify the model performance. The results indicate that; (1) the ground loosening due to local collapse of the ground at the shield face and at the shield crown are necessary to take into consideration in order to simulate the actual shield behavior; (2) the force due to the deformation of wire brush affects the shield postures; and (3) the simulation results are in good agreement with the observed data.