Comparison of Radial Consolidation Behavior of Clay under Three Types of Cyclic Loading

IF 1 Q4 ENGINEERING, CIVIL
َAmin Amiri, M. M. Toufigh, Sina Sadeghi Janat Abadi, V. Toufigh
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引用次数: 2

Abstract

Vertical drains and stone columns which have been used in infrastructure construction for highways, ports, coastal regions, etc., provide significant benefits for improving soil characteristics such as reducing the drainage length and accelerating the consolidation process. So the investigation of the radial consolidation is inevitable. Soils may be subjected to cyclic loading such as silos, tanks, etc. This paper presents semi-analytical solutions for radial consolidation and investigates the consolidation behavior under three types of cyclic loading. Consolidation under cyclic loads was calculated using the superimposition rule. Barron (1948) and Olson (1977) have presented theories for calculating radial consolidation under static and ramp load respectively. In this study, by using a set of continuous static loads or a series of infinite ramp loads, with alternatively positive and negative signs, we have extended these theories for rectangular, triangular and trapezoidal cyclic loads. The obtained analytic results demonstrate that the average degree of consolidation at the steady state depends on the integral of the load-time curve for each cycle and it increases with increase of the integral and the results indicate that change in cycle period of time does not effect on the time of getting steady state. Radial and vertical consolidation under rectangular cyclic loading have also compared and the effect of the distance between vertical drains on the time of getting steady state have investigated.
三种循环荷载作用下粘土径向固结特性的比较
垂直排水管和石柱在公路、港口、沿海地区等基础设施建设中得到了应用,对改善土壤特性,缩短排水长度,加速固结过程具有显著的效益。因此,研究径向固结是必然的。土壤可能受到循环荷载,如筒仓、储罐等。本文给出了径向固结的半解析解,并对三种循环荷载作用下的固结特性进行了研究。循环荷载作用下的固结计算采用叠加规则。Barron(1948)和Olson(1977)分别提出了计算静荷载和斜坡荷载下径向固结的理论。在本研究中,通过使用一组连续静荷载或一系列无限斜坡荷载,正负交替符号,我们将这些理论推广到矩形,三角形和梯形循环荷载。分析结果表明:稳定状态下的平均固结程度取决于各循环荷载-时间曲线的积分,并随着积分的增大而增大;循环时间的变化对达到稳定状态的时间没有影响。对比了矩形循环荷载作用下的径向固结和竖向固结,研究了竖向水孔间距对稳定时间的影响。
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
CiteScore
1.30
自引率
60.00%
发文量
0
审稿时长
47 weeks
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