复合土工膜封闭特殊土路基动态性能模型试验研究

黄俊杰; 苏谦; 赵文辉; 王武斌

doi:10.3969/j.issn.0258-2724.2017.05.011

复合土工膜封闭特殊土路基动态性能模型试验研究

doi: 10.3969/j.issn.0258-2724.2017.05.011

黄俊杰^1,2,
苏谦^1,2, ,,
赵文辉¹,
王武斌¹

基金项目:

国家自然科学基金资助项目（51508478，51378441）

详细信息

作者简介:
黄俊杰(1984-),男,博士,硕士生导师,研究方向为高速与重载铁路路基动力学与设计,E-mail:jjhuang_swjtu@126.com

通讯作者:
苏谦(1972-),男,教授,博士生导师,研究方向为土工设计理论与动力学,E-mail:suqian@126.com

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出版历程
- 收稿日期: 2015-06-23
- 刊出日期: 2017-10-25

Model Experimental Study on Dynamic Performance of Special Soil Subgrade Reinforced with Composite Geomembrane Seal Layer

HUANG Junjie^1,2,
SU Qian^{1,2
, ,},
ZHAO Wenhui¹,
WANG Wubin¹

摘要

摘要: 为了分析复合土工膜封闭基床底层特殊土对有砟轨道特殊土路基的保护效果，建立了2组有砟轨道特殊土路基足尺试验模型，研究了在有无复合土工膜封闭特殊土基床底层的条件下，浸水前后有砟轨道特殊土路基试验模型的动态性能.试验结果表明：在同等加载频率和等级条件下，浸水后无布组试验模型振动状态比有布组更剧烈；在未浸水循环动力荷载作用下，当加载次数达到8万次后，有布组和无布组试验模型累积变形均逐渐趋于稳定；在浸水循环动力荷载作用下，无布组累积变形持续增大，而有布组累积变形逐渐趋于稳定，当加载140万次后，无布组基床底层顶面特殊土含水量和地基系数K30值分别增加了41%和降低了39%，有布组基本无变化；采用复合土工膜封闭特殊土基床底层，可有效阻截地表水下渗，防止基床底层特殊土填料浸水软化，使有砟轨道特殊土路基在循环荷载作用下具有良好的长期动力稳定性.
- 有砟轨道 /
- 特殊土基床 /
- 复合土工膜 /
- 模型试验 /
- 动态性能
Abstract: To analyze the protective effect of a composite geomembrane seal layer on special soil subgrades, two full-scale models of ballast track-special soil subgrade were developed. In this study, the dynamic performance of ballast track-special soil subgrades with and without a composite geomembrane seal layer were investigated under both soaked and unsoaked conditions. The test results show that the vibration in the model without a composite geomembrane seal layer is more severe than the vibration in the model with a composite geomembrane seal layer for the same loading frequency and level. Under cyclic loading in unsoaked conditions, the accumulative settlement of the models with and without a composite geomembrane seal layer tends to stabilize at cyclic loading greater than 80,000 cycles. Under cyclic loading in soaked conditions, the accumulative settlement of the model without a composite geomembrane seal layer continually increases, while the accumulative settlement of the model with a composite geomembrane seal layer gradually stabilizes. When the cyclic loading reaches 1,400,000 cycles, the moisture content of the special soil is increased by 41%, while the K30 value at the top of the bottom layer of the subgrade is reduced by 39% in the model without a composite geomembrane seal layer. However, the moisture content of the special soil and K30 values for the model with a composite geomembrane seal layer remain basically unchanged. The composite geomembrane used for protecting the special soil of a subgrade bed can effectively intercept water seeping into the subgrade bottom of a bed filled with special soil, which can prevent the special soil from softening. Therefore, the ballast track-special soil subgrade demonstrates favorable long-term dynamic stability when subjected to cyclic loading.
- ballast track /
- special soil subgrade bed /
- composite geomembrane /
- model test /
- dynamic performance

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参考文献(14)

王炳龙,周文杰,周顺华,等. 土工固格网改善基床土的动应力分析[J]. 铁道学报,1998,5:104-109. WANG Binglong, ZHOU Wenjie, ZHOU Shunhua, et al. Geocell improving dynam ic stress of subgrade[J]. Journal of the China Railway Society, 1998, 5:104-109.

曹新文,蔡英,苏谦. 土工格室和土工网改善基床动态性能模型试验[J]. 西南交通大学学报,2001,36(4):350-354. CAO Xinwen, CAI Ying, SU Qian. Model test study of dynamic performances of the subgrade reinforced with geocell and geonet[J]. Journal of Southwest Jiaotong university, 2001, 36(4):350-354.

曹新文,罗强,薜双纲. 土工格室和土工网加固基床效果静态模型试验[J]. 西南交通大学学报,2001,36(3):322-326. CAO Xinwen, LUO Qiang, XUE Shuanggang. Model test of the effects of geocells and geonets on subgrade strengthening under static loads[J]. Journal of Southwest Jiaotong University, 2001, 36(3):322-326.

刘尧军,冯怀平,赵玉成. 秦沈客运专线两布-膜加固路基基床施工工艺[J]. 西部探矿工程,2004,16(12):171-172. LIU Yaojun, FENG Huaiping, ZHAo Yucheng. The construction technology for subgrade reinforced with composite geomembrane of Qinhuangdao-Shenyang passenger special line[J]. West-China Exploration Engineering, 2004, 16(12):171-172.

杨伟, 杜璇. "两布一膜"复合型土工布在膨胀土路堑基床中的应用[J]. 铁道建筑,2001(2):13-14. YANG Wei, DU Xuan. Application of "dual textiles plus one membrane" composite geomembrane in subgrade bed of swelling soil cutting[J]. Railway Engineering, 2001(2):13-14.

邹斌,沈如,齐琳琳. 改性脲醛树脂加固基床土质的研究[J]. 西南交通大学学报,2001,36(1):33-36. ZOU Bin, SHEN Ru, QI Linlin. Research on stabilizing the railway roadbed with improved urea-formaldehyde-resin[J]. Journal of Southwest Jiaotong University, 2001, 36(1):33-36.

曹新文,蔡英. 客运专线土工格室复合基床的试验研究[J]. 铁道工程学报,2006(1):22-26. CAO Xinwen, CAI Ying. Experimental research on the geocell of compound subgrade-bed for passenger dedicated railway line[J]. Journal of Railway Engineering Society, 2006(1):22-26.

铁道第四勘察设计院. TB 10035-2006铁路特殊路基设计规范[S]. 北京:中国铁道出版社,2006.

王亮亮,杨果林,房以河,等. 高速铁路膨胀土路堑全封闭基床动力特性现场试验[J]. 岩土工程学报,2014,36(4):640-645. WANG Liangliang, YANG Guolin, FANG Yihe, et al. In-situ tests on dynamic character of fully-enclosed cutting subgrade of high-speed railways in expansive soil areas[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(4):640-645.

杨果林,王亮亮,房以河,等. 云桂高速铁路不同防水层基床动力特性现场试验[J]. 岩石力学与工程学报,2014,33(8):1672-1678. YANG Guolin, WANG Liangliang, FANG Yihe, et al. In-Situ test on dynamic characteristics of cutting subgrade with different waterproof layers along yun-gui high-speed railway[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(8):1672-1678.

杨果林,王亮亮. 新型全封闭膨胀土路堑基床振动特性模型试验[J]. 中南大学学报:自然科学版,2014(8):2824-2829. YANG Guolin, WANG Liangliang. Model test on vibration characteristic of fully-closed express railway cutting subgrade in swelling soil area[J]. Journal of Central South University:Science and Technology, 2014(8):2824-2829.

杨果林,王亮亮,杨啸. 不同服役环境下高速铁路膨胀土路堑基床振动特性模型试验[J]. 岩土工程学报,2015,37(1):133-138. YANG Guolin, WANG Liangliang, YANG Xiao. Model tests on vibration characteristics of cutting subgrade of expansive soil of express railways under different service environments[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(1):133-138.

杨果林,邱明明,何旭,等. 膨胀土路堑基床新型防水层振动荷载下服役性能试验研究[J]. 振动与冲击, 2016,35(5):1-7,20. YANG Guolin, QIU Mingming, HE Xu, et al. Tests for working property of water-proof layer of cutting subgrade in expansive soil under vibrating load[J]. Journal of Vibration and Shock, 2016, 35(5):1-7,20.

胡一峰,李怒放. 高速铁路无砟轨道路基设计原理[M]. 北京:中国铁道出版社,2010:33-38.

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