Laboratory investigation and theoretical analysis of lateral pressure exerted by expansive soils on retaining walls with expanded polystyrene geofoam block upon water infiltration

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Geotextiles and Geomembranes Pub Date : 2023-12-09 DOI:10.1016/j.geotexmem.2023.11.005

Kewei Fan , Weilie Zou , Pan Zhang , Xiequn Wang , Yang Shen

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引用次数: 0

Abstract

The lateral pressure exerted by expansive soils on retaining walls constructed with expanded polystyrene geofoam blocks (EXRW-EPS), upon water infiltration to saturation, is crucial for designing these structures. In this study, model tests were employed to examine the behavior of EXRW-EPS subjected to water infiltration, with concurrent monitoring of deformation and lateral pressure. The results showed that the compressive deformation of the expanded polystyrene (EPS) geofoam block facilitated swelling deformations of the backfilled expansive soil, effectively mitigating the lateral pressure experienced by the retaining wall. Upon saturation of the backfilled expansive soil, the total lateral force on the wall decreased by approximately 44% by the EPS geofoam block with a density of 12 kg/m³. A practical method for predicting the lateral pressure on EXRW-EPS upon water infiltration to saturation was developed based on the relationship between the EPS geofoam block and the backfilled expansive soil. The reliability of this method was corroborated by the model test results. Additionally, the effects of the density and thickness of the EPS geofoam block on the lateral pressure of EXRW-EPS were analyzed using the prediction method.

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膨胀土对带膨胀聚苯乙烯土工泡沫块的挡土墙在水渗透时产生的侧压力的实验室调查和理论分析

膨胀性土壤对使用膨胀聚苯乙烯土工泡沫砌块（EXRW-EPS）建造的挡土墙在水渗入达到饱和状态时施加的侧压力对于设计这些结构至关重要。在这项研究中，采用了模型试验来研究 EXRW-EPS 在水渗入时的行为，并同时监测变形和侧压力。结果表明，发泡聚苯乙烯（EPS）土工泡沫块的压缩变形促进了回填膨胀土的膨胀变形，有效减轻了挡土墙承受的侧压力。在回填膨胀土饱和后，密度为 12 kg/m3 的 EPS 土工泡沫块对墙体的总侧向力降低了约 44%。根据 EPS 土工泡沫块与回填膨胀土之间的关系，开发了一种实用方法，用于预测 EXRW-EPS 在水渗入达到饱和时的侧压力。模型试验结果证实了这种方法的可靠性。此外，还利用预测方法分析了 EPS 土工泡沫块的密度和厚度对 EXRW-EPS 侧压力的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geotextiles and Geomembranes 地学-地球科学综合

CiteScore

9.50

自引率

21.20%

发文量

111

审稿时长

59 days

期刊介绍： The range of products and their applications has expanded rapidly over the last decade with geotextiles and geomembranes being specified world wide. This rapid growth is paralleled by a virtual explosion of technology. Current reference books and even manufacturers' sponsored publications tend to date very quickly and the need for a vehicle to bring together and discuss the growing body of technology now available has become evident. Geotextiles and Geomembranes fills this need and provides a forum for the dissemination of information amongst research workers, designers, users and manufacturers. By providing a growing fund of information the journal increases general awareness, prompts further research and assists in the establishment of international codes and regulations.