| 天津吹填软土的真三轴卸荷试验研究 |
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| 引用本文： | 王兔龙,李佐良,高雪咪. 天津吹填软土的真三轴卸荷试验研究[J]. 岩土工程技术, 2012, 0(5): 252-255 |
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| 作者姓名： | 王兔龙 李佐良 高雪咪 |
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| 作者单位： | [1]天津市勘察院,天津300191 [2]天津城市建设学院土木工程学院,天津300384 [3]中国地质大学地球科学与资源学院,北京100083 |
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| 摘 要： | 利用刚柔复合型真三轴仪对天津吹填软土进行真三轴试验，针对基坑开挖侧向卸荷变形特性进行不固结不排水条件模拟试验研究，控制大主应力△σ≈0、中主应变ε2≈0、小主应力方向卸荷。结果表明：侧向卸荷土体的初始卸荷模量随着围压的增大而增大，卸荷曲线ε1-ε3呈线性关系，泊松比与经典土力学相悖，μ31〉0．5且卸荷剪切过程中随着围压的增大而变大，孔隙水压力在卸荷剪切过程中先增大后减小。
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| 关 键 词： | 吹填软土 侧向卸荷 不排水条件 真三轴试验 应变 |
Study on Lateral Unlaoding of Tianjin Soft Dredger Soil by True Triaxial Text |
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| Wang Tulong Li Zuoliang Gao Xuemi. Study on Lateral Unlaoding of Tianjin Soft Dredger Soil by True Triaxial Text[J]. Geotechnical Engineering Technique, 2012, 0(5): 252-255 |
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| Authors: | Wang Tulong Li Zuoliang Gao Xuemi |
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| Affiliation: | Wang Tulong Li Zuoliang Gao Xuemi (1. Tianjin Prospecting Insitute,Tianjin 300191, China; 2. Department of civil engineering, Tianjin Institute of urban construction, Tianjin 300384, China; 3. School of Earth Science and Resources, China University of Geosciences, Beijing 100083,China) |
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| Abstract: | In order to conduct the research on deformation properties of unloading of pit excavation,a series of true triaxial tests were performed in tianjin soft dredger fills under the condition of unconsolidated-undrained with rigid-flexible composite true triaxial apparatus, it keeps that major principle stress fixed and intermediate principal strain;2 ;0 and minor principle stress decreased. The results indicated that tangent compression modulus increases with increasing of compression stress, stress-strain relationεl andε3 is linearity, poisson ratio is not match with classical soil mechanics theoryμ31〉0.5 and increases with increasing of compression stress, pore water pressure increases at first then decreases. |
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| Keywords: | soft dredger soil lateral unloading undraining condition true triaxial test strain |
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