土工格室加固风积沙路基的空间动力响应（英文）

刘杰; 刘秦李; 刘学军; 李凯强; 胡昌涛; 艾钰皓

doi:10.13928/j.cnki.wrahe.2026.04.014

水利水电技术（中英文） ›› 2026, Vol. 57 ›› Issue (4) : 187 -201. DOI: 10.13928/j.cnki.wrahe.2026.04.014

工程基础

土工格室加固风积沙路基的空间动力响应（英文）

刘杰 ¹^,²^,³ ,
刘秦李 ¹^,²^,³ ,
刘学军 ⁴ ,
李凯强 ¹^,²^,³ ,
胡昌涛 ¹^,² ,
艾钰皓 ¹^,²

作者信息 +

Spatial dynamic response of aeolian sand subgrade reinforced by geocell

Jie LIU ¹^,²^,³ ,
Qinli LIU ¹^,²^,³ ,
Xuejun LIU ⁴ ,
Kaiqiang LI ¹^,²^,³ ,
Changtao HU ¹^,² ,
Yuhao AI ¹^,²

Author information +

文章历史 +

PDF (18959K)

摘要

【目的】研究土工格室加固风积沙的新型沙漠公路路基结构的空间动力响应。【方法】基于动三轴试验，通过监测响应加速度变化开展现场试验，获取土工格室加固路基结构沿深度方向和水平方向的响应加速度衰减规律及动力响应范围，并进一步探讨土工格室加固材料对风积沙路基的动力响应机制。【结果】结果表明，车辆荷载和车速对新型风积沙路基的响应加速度有较大影响。响应加速度在深度方向呈现非线性衰减，且随着深度的增加，衰减速率逐渐减缓。同时，水平方向的响应加速度呈指数衰减变化规律。因此，建立了风积沙路基沿水平方向的响应加速度衰减预测模型。【结论】结果表明：在现场试验条件下，路基最主要的动力响应区域为深度1.2 m和水平2.5 m范围内。土工格室对风积沙的加固作用提高了约束压力水平，限制了土体的侧向位移。此外，加固效应抑制了土体中剪切带的形成，从而使路基土体的能量耗散更加显著。

Abstract

[Objective] The spatial dynamic response of a new desert highway subgrade structure by geocell reinforcement with aeolian sand is studied. [Methods] Based on the dynamic triaxial test, a field test via monitoring the response acceleration change is carried out. The attenuation law and dynamic response range of the response acceleration along the depth and horizontal directions of the subgrade are obtained for the geocell-reinforced subgrade structure. The mechanism of dynamic response of geocell-reinforced materials to aeolian sand subgrade is further discussed. [Results] The result show that both vehicle load and vehicle speed have a great influence on the response acceleration of the new aeolian sand subgrade. The response acceleration shows a nonlinear attenuation in the depth direction, and the attenuation rate gradually slows down with increasing depth. Meantime, the horizontal direction shows a variation of exponential decay. Therefore, an attenuation prediction model of response acceleration along the horizontal direction of aeolian sand subgrade is established. [Conclusion] Based on this field test condition, the most dominant dynamic response region of the subgrade is in a range of 1. 2 m in depth and 2. 5 m in horizontal. The reinforcement effect of geocell on aeolian sand increases the confining pressure level, and restricts the lateral displacement of soil. In addition, the generation of shear bands in the soil is inhibited by the reinforcement effect. This makes the energy dissipation of the subgrade soil more obvious.

关键词

路基工程 / 土工格室 / 风积沙 / 大型三轴试验 / 空间动力响应 / 动三轴 / 现场试验 / 影响因素

Key words

subgrade engineering / geocell / aeolian sand / large-scale triaxial test / spatial dynamic response / dynamic triaxial test / field test / influencing factors