基于双等沉降平面的稳定板桩支撑路堤沉降和应力分析

IF 1.5 4区 工程技术 Q3 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS Engineering Computations Pub Date : 2024-07-05 DOI:10.1108/ec-09-2023-0582
Ying Wang, Chaojie Wang, Zhenhua Hu, Yonghui Chen, Bo Min
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引用次数: 0

摘要

目的 软稳定板桩支撑路堤是提高公路建设资源利用效率的一种改进技术。为全面掌握稳定板对路堤应力传递机制、差异沉降和侧向位移的影响。设计/方法/途径在理论模型中,根据最小势能理论和等沉降面理论分析了系统的应力和应变协调关系。随后,将理论方法应用于现场试验进行比较。除了实验结果,该方法还能有效利用稳定板效应,提高土体和桩的承载力,因此被认为是合理可行的。研究得出了一个经济合理的稳定板厚度和强度布置方案。结果表明,最佳弹性模量选取为 28 MPa-60 MPa,利用现场试验参数选取稳定板最佳厚度为 1.5 m-2.1 m,可为工程设计提供指导。通过比较现场试验中的沉降和应力集中比,分析了模型的合理性。随后,研究了稳定板的弹性模量和厚度对应力集中比和沉降的影响。研究得出了一种经济合理的稳定板厚度和弹性模量布置方案,为工程设计提供了一种新方法。
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Settlement and stress analysis in stabilized slab- and pile-supported embankment based on double-equal settlement plane

Purpose

The soft stabilized slab and pile-supported (SSPS) embankment is an improvement technique to increase the efficiency of resources in road construction. To capture the effects of stabilized slabs on the stress transfer mechanism, the differential settlements and the lateral displacement of the embankment completely. A theoretical model of SSPS is proposed by considering the effect of soil arching and the interaction between the embankment fill, stabilized soil, pile, foundation soil and bearing stratum.

Design/methodology/approach

In the theoretical model, the stress and strain coordination relationship of the system was analyzed in view of the minimum potential energy theory and equal settlement plane theory. Subsequently, the theoretical method was applied to field tests for comparison. Finally, the influence of the elastic modulus and the thickness of the stabilized slab on the stress concentration ratio and foundation settlement were examined.

Findings

In addition to the experimental findings, the method has been revealed to be reasonable and feasible, considering its ability to effectively exploit the stabilized slab effect and improve the bearing capacity of soil and piles. An economical and reasonable arrangement scheme for the thickness and strength of stabilized slabs was obtained. The results reveal that the optimum elastic modulus was chosen as 28 MPa–60 MPa, and the optimum thickness of the stabilized slab was selected as 1.5 m–2.1 m using the parameters of field tests, which can provide guidance to engineering design.

Originality/value

An optimization calculation method is established to analyze the load transfer mechanics of the SSPS embankment based on a double-equal settlement plane. The model’s rationality was analyzed by comparing the settlement and stress concentration ratios in the field tests. Subsequently, the influence of the elastic modulus and the thickness of the stabilized slab on the stress concentration ratio and settlement were examined. An economical and reasonable arrangement scheme for the thickness and elastic modulus of stabilized slabs was obtained, which can provide a novel approach for engineering design.

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来源期刊
Engineering Computations
Engineering Computations 工程技术-工程:综合
CiteScore
3.40
自引率
6.20%
发文量
61
审稿时长
5 months
期刊介绍: The journal presents its readers with broad coverage across all branches of engineering and science of the latest development and application of new solution algorithms, innovative numerical methods and/or solution techniques directed at the utilization of computational methods in engineering analysis, engineering design and practice. For more information visit: http://www.emeraldgrouppublishing.com/ec.htm
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