Validating and Improving Models for Vibratory Installation of Steel Sheet Piles with Field Observations
Validating and Improving Models for Vibratory Installation of Steel Sheet Piles with Field Observations
复制标题
通过现场观察验证和改进钢板桩振动安装模型
DOI：
10.1007/s10706-012-9506-5
复制
发表时间：
2012
影响因子：
1.7
通讯作者：
A. V. Tol
中科院分区：
文献类型：
--
作者：
A. Mens;M. Korff;A. V. Tol
振动打桩是钢板桩墙最常用的安装技术。在实践中，对这种安装过程的可行性的评估主要基于经验法则、数字和经验模型或专家意见。为了改进这些预测方法和公式，从荷兰工程实践中的252个观测值与六种不同类型的模型进行了比较。这种比较已经进行了应用受试者工作特性（ROC）曲线技术，这是新的岩土工程。本文介绍了ROC曲线技术，主要是估计模型的质量，并能够优化模型中的参数和变量。使用252个现场观察结果重新检查最小所需振动力的预测方法，并证明ROC方法有效。本文表明，这种技术适用于三个目的：（1）确定模型的质量，（2）客观地比较几个模型，给出一定的假设和（3）优化模型内的阈值。事实证明，增加了专业人士经验的模型与数值模型Hypervib-I的性能相同。
Vibratory driving is the most common installation technique for steel sheet pile walls. In practice, the assessment of the feasibility of this installation process is mainly based on rules of thumb, on numerical and empirical models or on experts opinions. In order to improve these prediction methods and formulas, 252 observations from the Dutch engineering practice have been compared with six different types of models. This comparison has been carried out applying the receiver operating characteristic (ROC) curve technique, which is new in geotechnical engineering. This paper introduces the ROC-curve technique to estimate mainly the quality of a model and to be able to optimize parameters and variables in the model. 252 field observations were used to re-examine prediction methods for the minimum required vibration force and to prove the ROC method works. The paper shows this technique is suitable for three purposes: (1) determining the quality of a model, (2) objectively comparing several models to each other, given certain assumptions and (3) for optimizing thresholds within a model. The model with added professionals’ experience proves to perform equally well as the numerical model Hypervib-I.