水泥改良黄土抗冲刷性能影响因素研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (7): 2418-2427.

水泥改良黄土抗冲刷性能影响因素研究

祁晓强¹, 袁可佳², 蔡露瑶², 刘海鹏³, 董鑫³

1.陕西西法(北线)城际铁路有限公司,西安 710005;
2.长安大学公路学院,西安 710064;
3.陕西省铁路集团有限公司,西安 710199

收稿日期:2021-01-30 修回日期:2021-03-02 出版日期:2021-07-15 发布日期:2021-08-04
通讯作者: 袁可佳,博士研究生。E-mail:ykj@chd.edu.cn
作者简介:祁晓强(1979—),男,工程师。主要从事土木工程相关的工作。E-mail:732555460@qq.com
基金资助:
陕西省交通运输厅科技项目(18-02K,19-27K)

Influencing Factors of Anti-Erosion Performance of Cement Improved Loess

QI Xiaoqiang¹, YUAN Kejia², CAI Luyao², LIU Haipeng³, DONG Xin³

1. Shaanxi Xifa (North Line) Intercity Railway Co., Ltd, Xi’an 710005, China;
2. School of Highway, Chang’an University, Xi’an 710064, China;
3. Shaanxi Province Railway Group Co., Ltd, Xi’an 710199, China

Received:2021-01-30 Revised:2021-03-02 Online:2021-07-15 Published:2021-08-04

摘要/Abstract

摘要： 为了分析水泥改良黄土抗冲刷性能及影响因素,试验研究了成型方法、水泥剂量、压实系数和冲刷作用次数对水泥改良黄土抗冲刷性能的影响规律,并进一步研究了冲刷作用对水泥改良黄土强度劣化的影响。结果表明:与静压法相比,振动法成型试件的抗冲刷性能更优,其相对冲刷量至少可降低10%;水泥剂量提高1%(质量分数),抗冲刷性能平均提高16%,压实系数提高0.01,抗冲刷性能至少提高6.2%;冲刷作用次数对水泥改良黄土的冲刷质量损失影响较为显著,改良黄土累积冲刷量随冲刷作用次数增加呈线性增长;冲刷作用使改良黄土的抗压强度显著下降,振动法成型试件劣化度平均值为79.5%,静压法成型试件劣化度平均值为73.7%。

关键词: 铁路工程, 水泥改良黄土, 抗冲刷性能, 成型方法, 水泥剂量, 压实系数, 冲刷作用次数

Abstract: To analyze the anti-erosion performance and influencing factors of cement improved loess (CIL), the influences of the compaction method, cement content, compaction coefficient, erosion times on the anti-erosion performance of CIL were studied. Furthermore, the influence of erosion on the strength deterioration of CIL was studied. The results show that compared with the quasi-static compaction method (QSCM), the anti-erosion performance of specimen compacted using the vertical vibration compaction method (VVTM) is better, and the relative erosion mass is reduced by at least 10%. When the cement content increases 1% (mass fraction) and the compaction coefficient increases 0.01, the anti-erosion performance increases 16% and 6.2%, respectively. The erosion times has a significant effect on the quality loss of CIL, and the cumulative erosion mass increases linearly with the increase of erosion times. The compressive strength of CIL decreases significantly due to the erosion, and the average deterioration degree of specimens compacted using VVTM is 79.5%, and that of specimens compacted using QSCM is 73.7%.

Key words: railway engineering, cement improved loess, anti-erosion performance, compaction method, cement content, compaction coefficient, erosion times

中图分类号:

TU411

祁晓强, 袁可佳, 蔡露瑶, 刘海鹏, 董鑫. 水泥改良黄土抗冲刷性能影响因素研究[J]. 硅酸盐通报, 2021, 40(7): 2418-2427.

QI Xiaoqiang, YUAN Kejia, CAI Luyao, LIU Haipeng, DONG Xin. Influencing Factors of Anti-Erosion Performance of Cement Improved Loess[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(7): 2418-2427.

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