重塑黄土饱和与固结时间三轴试验研究

谌文武; 刘伟; 孙冠平; 毕骏; 张帅; 陈鹏飞

doi:10.13544/j.cnki.jeg.2014.05.10

重塑黄土饱和与固结时间三轴试验研究

doi: 10.13544/j.cnki.jeg.2014.05.10

谌文武^1,2,
刘伟^1,2,
孙冠平^1,2,
毕骏^1,2,
张帅^1,2,
陈鹏飞^1,2

1.
兰州大学土木工程与力学学院兰州 730000;
2.
西部灾害与环境力学教育部重点实验室兰州 730000

基金项目:

国家重点基础研究发展计划（973）项目（2014CB744700）资助

详细信息

作者简介:
谌文武（1966- ），男，博士，教授，博士生导师，主要从事地质灾害与文物保护方面工作. Email: sungp@lzu.edu.cn

中图分类号: P642
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出版历程
- 收稿日期: 2014-05-20
- 修回日期: 2014-07-02
- 刊出日期: 2014-10-25

TRIAXIAL TEST ON SATURATION AND CONSOLIDATION OF REMOULDED LOESS

CHEN Wenwu^1,2,
LIU Wei^1,2,
SUN Guanping^1,2,
BI Jun^1,2,
ZHANG Shuai^1,2,
CHEN Pengfei^1,2

1.
College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000;
2.
Key Laboratory of Mechanics on Environment and Disaster in Western China, Lanzhou 730000

摘要

摘要: 饱和黄土三轴试验中，土样饱和及固结过程是否完成对试验结果至关重要。土工试验饱和方法中，通常所使用的抽气饱和是提高土样饱和度的有效方法，但对于重塑马兰黄土样，抽气饱和中试样浸水后会发生结构溃散。因此，土样只能在三轴仪上进行饱和。本研究基于GDS非饱和三轴仪对兰州地区的马兰黄土重塑样进行多次饱和试验与固结试验，提出在GDS三轴仪外压力室外部设置三通接头，将试样顶部和底部接通汇集为同一路径，将饱和路径与排水路径均缩短为原来的一半，可明显缩短试验饱和时间与固结时间，进而实现在土样达到预定饱和度情况下缩短试验总时间的目标。而且，本试验中土样上、下同时进水或排水，也符合土体在自然界真实赋存状态下的饱和与固结过程。经反复验证，该方法在粉质黏土重塑样的三轴试验中使用效果较好。
- 三轴试验 /
- 反压饱和 /
- 固结试验 /
- 饱和时间 /
- 三通阀门
Abstract: The saturation and consolidation status of soil samples is very important in the triaxial test of saturated loess. The vacuum saturation is a common effective way to saturate samples in the test. It is very difficult to saturate the remoulded loess samples by vacuum saturation which may destroy the structure of remoulded loess. So the remoulded loess samples have to be saturated on the triaxial apparatus. A number of saturation tests and consolidation tests are carried on the unsaturated triaxial apparatus of GDS for remoulded loess at Lanzhou. A tee-joint is installed on the triaxial apparetus to cut down the time of saturation test and consolidation test. Also it is a better way to simulate the soils in natural state through up and down to saturate and consolidate. This work contributes to the saturation and consolidation of silty clay in the triaxial test.
- Triaxial test /
- Back-pressure saturation /
- Consolidatioin test /
- Time of saturation /
- Tee-joint

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参考文献(1)

[1] 黄强兵, 刘悦,彭建兵. 黄土路堑边坡变形破坏机理的三轴试验研究[J]. 工程地质学报, 2007, 15 (6): 806～811.

Huang Qiangbing, Liu Yue, Peng Jianbing. Triaxial test study on the deformation and failure mechanism of loess cut slope[J]. Journal of Engineering Geology, 2007, 15 (6): 806～811.

[2] 熊冰, 胡小明. 黄土湿化特性的三轴试验研究[J]. 铁道工程学报, 2007, (6): 23～27.

Xiong Bing, Hu Xiaoming. The triaxial test study of loess wetting properties[J]. Journal of Railway Engineering Society, 2007, (6): 23～27.

[3] 江美英, 骆亚生. 应力路径对黄土结构性的影响[J]. 岩土力学, 2009, 30 (S2): 235～238.

Jiang Meiying, Luo Yasheng. Influence of stress path on structural characteristic of loess[J]. Rock and Soil Mechanics, 2009, 30 (S2): 235～238.

[4] 陈辉, 刘明振,宋战平. 重塑及原状饱和黄土结构性参数研究[J]. 地下空间与工程学报, 2010, 6 (3): 487～497.

Chen Hui, Liu Mingzhen, Song Zhanping. Study on structural parameters of disturbed loess and saturated intact loess[J]. Chinese Journal of Underground Space and Engineering, 2010, 6 (3): 487～497.

[5] 孙海妹, 王兰民,刘红玫,等. 原状黄土的反压饱和法试验研究[J]. 防灾减灾工程学报, 2010, 30 (1): 98～102.

Sun Haimei, Wang Lanmin, Liu Hongmei, et al. Experimental study on the back pressure saturation method of undisturbed loess[J]. Journal of Disaster Prevention and Mitigation Engineering, 2010, 30 (1): 98～102.

[6] 王兰民, 刘红玫,李兰,等. 饱和黄土液化机理与特性试验研究[J]. 岩土工程学报, 2000, 22 (1): 89～94.

Wang Lanmin, Liu Hongmei, Li Lan, et al. Laboratory study on the mechanism and beheviors of saturated loess liquefaction[J]. Chinese Journal of Geotechnical Engineering, 2000, 22 (1): 89～94.

[7] 金艳丽, 戴福初. 灌溉诱发黄土滑坡机理研究[J]. 岩土工程学报, 2007, 29 (10): 1493～1499.

Jin Yanli, Dai Fuchu. The mechanism of irrigation-induced landslides of loess[J]. Chinese Journal of Geotechnical Engineering, 2007, 29 (10): 1493～1499.

[8] 周永习, 张得煊,罗春泳,等. 饱和黄土稳态强度特性的试验研究[J]. 岩土力学, 2010, 31 (5): 1486～1496.

Zhou Yongxi, Zhang Dexuan, Luo Chunyong, et al. Experimental research on steady strength of saturated loess[J]. Rock and Soil Mechanics, 2010, 31 (5): 1486～1496.

[9] Black,Lee. Saturating laboratory samples by back-pressure[J]. Journal of Geotechnical Engineering Division, 1973, 99(sm1): 75～93.

[10] Lowe J, Johnson T C. Use of back-pressure to increase degree of saturation of triaxial test specimens[A]//Proceedings of ASCE conforence on shear strength of cohesive soils[C]. Boulder, Colo. , 1960, 819～836.

[11] Rad N S, Clough G W. New procedure for saturating sand specimens[J]. Journal of Geotechnical Engineering, 1984, 110 (9): 1205～1218.

[12] 王平, 王谦,王兰民,等. 黄土室内液化试验饱和方法的研究现状及前景展望[J]. 世界地震工程, 2011, 27 (4): 86～90.

Wang Ping, Wang Qian, Wang Lanmin, et al. Status quo and prospect of research on saturated methods in loess liquefaction test[J]. World Earthquake Engineering, 2011, 27 (4): 86～90.

[13] 燕碧华. 浅谈室内土工试验的试样饱和[J]. 西部探矿工程, 2012, (2): 22～26.

Yan Bihua. A discussion of saturation on indoor experiment[J]. West-China Exploration Engineering, 2012, (2): 22～26.

[14] 周立波, 王旭,王伟华,等. 室内土工试验中试样饱和方法研究[J]. 西部探矿工程, 2007, (11): 36～38.

Zhou Libo, Wang Xu, Wang Weihua, et al. A study of saturated methods on indoor experiment[J]. West-China Exploration Engineering, 2007, (11): 36～38.

[15] 中华人民共和国国家标准.GB/T50123-1999土工试验方法标准[S].北京:中国计划出版社, 1999.

Ministry of Water Resources of the Peoples Republic of China. (1999)Code for soil test method, GB/T50123-1999[S]. Beijing: China Planning Press, 1999.

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