Geotechnical Engineering in the Digital and Technological Innovation Era
Geotechnical Engineering in the Digital and Technological Innovation Era
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数字化和技术创新时代的岩土工程
DOI：
10.1007/978-3-031-34761-0_58
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Riccio T
中科院分区：
文献类型：
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作者：
Riccio T
基于CPT数据的轴向桩设计方法最近已被开发用于低中密度白垩地面条件，而类似边界值问题的数值模拟已被证明有助于更好地理解桩的行为，并有助于现场和物理试验的解释。提出了一种软岩先进本构模型的简单标定方法。为此，一个新开发的软oedometer装置能够测量轴向和径向应力进行一维压缩试验的低中密度白垩样品。校准后的大应变本构模型，然后用于执行一个CPT安装在白垩的数值模拟。结果进行了比较，现场数据，展示了模型的能力，并强调了潜在的软oedometer的本构模型的校准，而不需要三轴试验数据。
Axial pile design approaches based on CPT data have recently been developed for low-medium density chalk ground conditions, while numerical modelling of similar boundary value problems has proved useful in understanding better pile behavior and aiding the interpretation of field and physical tests. In this paper a simple method to calibrate an advanced constitutive model for soft rocks is presented. To this end a newly developed soft oedometer apparatus able to measure both axial and radial stresses is used to perform 1D compression tests of low-medium density chalk samples. The calibrated large strain constitutive model is then used to perform a numerical simulation of a CPT installation in chalk. The results are compared to field data, showcasing the models’ capabilities, and highlighting the potential of the soft oedometer for the calibration of constitutive models without the need of triaxial test data.