固化淤泥三轴试验研究

›› 2006, Vol. 27 ›› Issue (S2): 591-594.

固化淤泥三轴试验研究

张春雷^{1, 2}，朱伟^{1, 3}，黄英豪²，刘青松²，大木宜章⁴

1. 河海大学环境科学与工程学院，南京 210098； 2. 河海大学岩土工程研究所，南京 210098；3. 河海大学水文水资源与水利工程科学国家重点实验室，南京 210098；4. 日本大学生产工学部土木工学科，千叶县习志野市 275-0006

收稿日期:2006-11-15 发布日期:2006-12-16
作者简介:张春雷，男，1978生，博士生，从事环境岩土工程方面的研究
基金资助:
国家自然科学基金资助项目(50379011)

Triaxial test of solidified dredged material

ZHANG Chun-lei ^{1, 2}, ZHU Wei^{1, 3}, HUANG Ying-hao³, LIU Qing-song³, T. OHKI ⁴

1. College of Environmental Science and Engineering, Hohai University, Nanjing 210098, China; 2. Institute of Geotechnical Engineering，Hohai University，Nanjing 210098, China; 3. State Key Laboratory of Hydrology, Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China; 4. Department of Civil Engineering, College of Industrial Technology, Nihon University, Tiba Narashino 275-0006, Japan

Received:2006-11-15 Published:2006-12-16

摘要/Abstract

摘要： 对不同水泥掺加量固化淤泥进行了固结不排水(CU)三轴剪切试验，对固化淤泥的破坏模式和抗剪强度参数进行了分析。试验结果表明：应力-应变曲线随着水泥量增加由理想弹塑性向应变软化型转变；当水泥量为50 kg/m3时，随固结压力的增加应力-应变曲线有理想弹塑性、应变软化和应变硬化三种类型；当水泥量高于100 kg/m3时，试样都呈脆性破坏模式。淤泥经水泥改良后成为一种结构性土，固结压力在小于试样结构屈服应力时对抗压强度影响不大。有效粘聚力随水泥量的增加呈较大的增长趋势，而有效内摩擦角分布在32o~42o，表明水泥固化淤泥的作用主要是提高土颗粒间的胶结，而填充孔隙的作用较弱。

关键词: 淤泥, 固化, 固结不排水三轴剪切试验, 有效粘聚力, 有效内摩擦角

Abstract: Consolidated undrained triaxial shear tests were conducted to investigate the behaviors of cement solidified dredged material (DM); the failure type and shear strength parameters were studied. Test results show that the stress-strain curves change from ideal elastoplasticity to strain softening with cement content increase. When cement content is 50 kg/m3, the stress-strain curves have three types with cell pressure increasing, namely, perfect elastoplasticity type, strain softening type and strain hardening type. When cement content is higher than 100 kg/m3, all the samples present brittle property. When DM is treated by cement, it becomes a kind of structured soil. When cell pressure is lower than sample structural strength, it has little influence on the compressive strength. The effective cohesion increases much with increase of cement content, while effective internal friction angle lies between 32 and 43 degree, indicating that the effect of cement solidification acts mainly on the bonding force among soil particles, and the filling effect is weak.

Key words: dredged material, solidification, consolidated undrained triaxial shear test, effective cohesion, effective internal friction angle

中图分类号:

TU 442

张春雷，朱伟，黄英豪，刘青松，大木宜章,. 固化淤泥三轴试验研究[J]. , 2006, 27(S2): 591-594.

ZHANG Chun-lei , ZHU Wei , HUANG Ying-hao , LIU Qing-song , T. OHKI ,. Triaxial test of solidified dredged material[J]. , 2006, 27(S2): 591-594.

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