Determination Method for the Foundation Horizontal Resistance Ratio Coefficient under Consideration of the Slope Effect

被引：0
|
作者：
Yin P.-B. [1 ,2 ]
Yang K.-B. [1 ,2 ]
Zhao M.-H. [3 ]
He W. [1 ,2 ]
Zhang Y.-J. [1 ,2 ]
机构：
[1] School of Civil Engineering, Changsha University of Science and Technology, Hunan, Changsha
[2] Key Laboratory of Special Environment Road Engineering of Hunan Province, Changsha University of Science and Technology, Hunan, Changsha
[3] Institute of Geotechnical Engineering, Hunan University, Hunan, Changsha
来源：
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | 2022年 / 35卷 / 11期
基金：
中国国家自然科学基金;
关键词：
bridge engineering; foundation proportional coefficient; model test; pile foundation; slope effect;
D O I：
10.19721/j.cnki.1001-7372.2022.11.002
中图分类号：
学科分类号：
摘要：
The proportional coefficient of the horizontal foundation resistance is crucial for the design of the pile foundation. The pile in sloping ground is designed based on the proportional coefficient of the flat site, and often brings security risks because the influence of slope effect is ignored. To study the influence of the slope effect on the proportional coefficient of the slope foundation, four groups of horizontal static load model tests of piles in cohesive soil slope foundation were designed and completed. The horizontal displacement curves for the pile body and load-displacement gradient curves of pile top were obtained under a slope of 0°, 15°, 30°, and 45°; and the fitting relationship between the scale coefficient of the foundation and slope was established. The influence of the slope foundation ratio coefficient on the horizontal bearing characteristics of piles were also analyzed. The research shows that the foundation's proportional coefficient of cohesive soil slope decreases nonlinearly with the increase in the horizontal displacement of the pile. When the horizontal displacement of the pile at the ground level is less than 6 mm, the foundation proportional coefficient decreases sharply before decreasing slightly. The critical load and ultimate load of the foundation pile decreases with an increase in the slope gradient. Compared with the flatland, the critical and ultimate loads of the pile decrease by approximately 17% and 16% respectively for every 15° increase in the slope gradient. The existing tests show that the larger the slope gradient, the smaller the ratio coefficient. When the slope angle increases by 15°, the corresponding proportion coefficients m of the gravel soil, sand soil, and clay soil slope foundations, decreased by approximately 38%, 32% and 31%, respectively. Based on the existing test and the test results in this study, the empirical relationship between the value standard of proportional coefficient for different types of slope foundations and gradients was established, which can provide a reference for the design of the pile in sloping ground. © 2022 Xi'an Highway University. All rights reserved.
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页码：12 / 20
页数：8
相关论文
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