[最新文献]实用方法预测地面移动---纽约曼哈顿开挖案例研究[12/19/2020]

1 论文

Excavation case study in Manhattan NY with practical approach to predict ground movements 实用方法预测地面移动---纽约曼哈顿开挖案例研究

Abstract: This paper presents the case study of the staged excavation for the New York University College of Nursing building in Manhattan, supported by corner braced secant pile walls. A commercial Finite Element (FE) software is used to simulate the complex supported excavation and predict the retaining wall deflections, using simple soil models calibrated from limited soil data. The results of the two-dimensional (2D) simulations are then compared against actual wall deflections measured by inclinometers during the excavation process. This research aims to determine whether the complex three-dimensional (3D) characteristics of this problem can be captured and accurately simulated by equivalent 2D models, using soil properties estimated from limited field data, which is typically the case faced in engineering practice. Equivalent axial and bending stiffnesses are also estimated, for simulating the square bracing system in plane-strain conditions. The numerical analyses yielded results that correlate with the measured data. This indicates that for this type of excavation problem, simplified plane-strain analyses can predict sufficiently small wall movements, given that appropriate stiffness magnitudes are assigned to the earth retaining system.

摘要：本文介绍了位于曼哈顿的纽约大学护理学院大楼的分期开挖案例，该大楼由角撑式沉桩墙支撑。使用商业有限元(FE)软件来模拟复杂的支撑开挖，并使用从有限的土壤数据中校准的简单土壤模型来预测挡土墙的挠度。然后将二维(2D)模拟结果与开挖过程中倾斜仪测量的实际墙体挠度进行比较。本研究的目的是确定这个问题的复杂的三维特性是否能被等效的二维模型所捕捉和准确模拟，使用从有限的现场数据估计的土壤特性，这是工程实践中通常面临的情况。等效的轴向和弯曲刚度也被估计出来，用于模拟平面应变条件下的方支撑系统。数值分析得出的结果与测量数据相关。这表明，对于这种类型的开挖问题，只要给土方挡土系统分配适当的刚度，简化的平面应变分析可以预测足够小的墙体移动。

2 相关文献

Note: '相关文献' 是按照Google的排序算法产生出来的.

[1] Excavation Safety Modeling Approach Using BIM and VPL

[2] A Case Study on the Numerical-Probability Approach for Deep Excavation Analysis

[3] Tunneling Beneath Open Water: A Practical Guide for Risk Management and Site Investigations

[4] Simple Method to Predict Ground Displacements Caused by Installing Horizontal Jet-Grouting Columns

[5] Predicting and controlling ground movements around deep excavations

[6] Practical Soil Dynamics: Case Studies in Earthquake and Geotechnical Engineering

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[7] GEOTECHNICAL ENGINEERING CIRCULAR NO. 6 Shallow Foundations

[8] Soil Vapor Extraction

[9] Practical Geotechnical and Engineering Properties for Tunnel-Boring Machine Performance Analysis and Prediction

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