Artificial Neural Network Model to Predict Anchored-Pile-Wall Displacements on Istanbul Greywackes

IF 0.8 4区 工程技术 Q4 ENGINEERING, CIVIL Teknik Dergi Pub Date : 2020-07-01 DOI:10.18400/tekderg.492280
Özgür Yıldız, M. Berilgen
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引用次数: 4

Abstract

Istanbul's main lithological unit is a greywacke formation locally known as the Trakya Formation. It is weathered and extensively fractured, and the stress relief induced by deep excavations causes excessive displacements in the horizontal direction. Therefore, predicting excavation-induced wall displacements is critical for avoiding damages. The aim of this study is to develop an Artificial Neural Network (ANN) model to predict anchored-pile-wall displacements at different stages of excavations performed on Istanbul's greywacke formations. A database was created on excavation and monitoring data from 11 individual projects in Istanbul. Five variables were used as input parameters, namely, excavation depth, maximum ground settlement measured behind the wall, system stiffness, standard penetration test N value of the soil depth, and index-of-observation point. The proposed model was trained, validated, and tested. Finally, two distinct projects were numerically modeled by applying the finite element method (FEM) and then used to examine the performance of the ANN model. The displacements predicted by the ANN model were compared with both the computed values obtained from the FEM analysis and actual measured displacements. The proposed ANN model accurately predicted the displacement of anchored pile walls constructed on Istanbul's greywackes at different excavation stages.
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人工神经网络模型预测伊斯坦布尔灰线桩墙锚固位移
伊斯坦布尔的主要岩性单位是当地称为Trakya组的灰岩组。它是风化和广泛的裂缝,深开挖引起的应力释放在水平方向上造成过大的位移。因此,预测开挖引起的墙体位移对于避免损伤至关重要。本研究的目的是开发一个人工神经网络(ANN)模型来预测伊斯坦布尔灰尾岩层开挖不同阶段的锚固桩墙位移。建立了一个关于伊斯坦布尔11个单独项目的挖掘和监测数据的数据库。输入参数为开挖深度、墙后实测最大地面沉降量、体系刚度、土深标准贯入试验N值、观测点指数5个变量。提出的模型经过了训练、验证和测试。最后,采用有限元方法对两个不同的工程进行了数值模拟,并对人工神经网络模型的性能进行了检验。将人工神经网络模型预测的位移与有限元分析计算值和实测位移进行了比较。所提出的人工神经网络模型能够准确预测伊斯坦布尔灰土上不同开挖阶段锚固桩墙的位移。
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来源期刊
Teknik Dergi
Teknik Dergi 工程技术-工程:土木
自引率
30.80%
发文量
65
审稿时长
>12 weeks
期刊介绍: The scope of Teknik Dergi is naturally confined with the subjects falling in the area of civil engineering. However, the area of civil engineering has recently been significantly enlarged, even the definition of civil engineering has somewhat changed. Half a century ago, engineering was simply defined as “the art of using and converting the natural resources for the benefit of the mankind”. Today, the same objective is expected to be realised (i) by complying with the desire and expectations of the people concerned and (ii) without wasting the resources and within the sustainability principles. This change has required an interaction between engineering and social and administrative sciences. Some subjects at the borderline between civil engineering and social and administrative sciences have consequently been included in the area of civil engineering. Teknik Dergi defines its scope in line with this understanding. However, it requires the papers falling in the borderline to have a significant component of civil engineering.
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