Prediction method of multidimensional consolidation for assessment of performance on soil structures

近年来，基于性能的设计在岩土工程销售中得到了发展。作为性能要求，确定了临界变形。为了验证性能，需要精确的变形预测是数值方法，例如有限元方法可以应用于施工前的设计。施工结束后，一般都要对现场的变形、孔压等性状进行测量，然后用来进行精确的变形预测，而反分析方法是有用的，并在本研究中进行了讨论。由于现场实测数据有限，这类模型不利于反问题的求解。因此，在本研究中，一个简化的双曲线模型被用来模拟这里使用的双曲线模型仅在…上所需的非线性剪切行为与线弹性支承相比，附加参数更多。为了准确地预测地基的侧向位移和剪胀特性，本研究假定了地基的横向各向异性，并应用作者开发的随机非线性固结模型来描述固结硬化和渗透率的降低。为了验证该方法的准确性，在试验装置上进行了二维固结模型试验，用空气施加约束压力，用加载活塞施加局部荷载。通过电荷耦合器件测量多点位移，通过压力传感器测量三点的杆件水压。试验材料为塑性较低的高岭土和塑性较高的卡索卡海相粘土。通过对实测数据的分析，验证了该方法在实际应用中的可行性。较少

Recently, performance-based designs have been developed in the Sell of geotechnical engineering. As a performance requirement, the critical deformation is determined. To verify the performance, accurate deformation predictions are required Numerical methods, such as the finite element method can be applied to pre-construction designs. While, after construction, in-situ behavior such as deformation and pore water pressure is generally measured and then employed to make precise deformation predictions For this task, the inverse analysis method is useful, and was discussed in this research.Although various nonlinear models exist, the models such as the elasto-plastic constitutive equations require a lot of parameters. And since the measured data obtained from the in-situ are limited, such models am not convenient for inverse problems. In this research, therefore, a simplified hyperbolic model was employed to simulate nonlinear shear behavior The hyperbolic model used here requires only on … More e additional parameter compared with the linear elastic maid. And the cross anisotropy of the ground was assumed in this research in order to accurately predict the lateral displacement, and the dilatancy behavior Furthermore, the stochastic non-linear consolidation model, which has been developed by the authors, was applied to present the consolidation hardening and the reduction of the permeabilityTo verify the accuracy of the proposed method, the two-dimensional consolidation model tests were carried out In the test equipment, the constraining pressure is applied by the air and the local load is applied with the loading piston. The displacements are measured at multi points through the CCD, and also the pole water pressures at three points by the pressure transducer. As experimental materials, Kaolin clay, which has low plasticity and Kasaoka marine clay which has high plasticity were employed here. For the measured data, the proposed method was applied and the possibility of its practical use was verified. Less