| 双向动荷载饱和粉土孔隙水压力研究 |
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| 引用本文： | 刘寒鹏,王哲.双向动荷载饱和粉土孔隙水压力研究[J].天津城市建设学院学报,2014(4):232-236. |
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| 作者姓名： | 刘寒鹏 王哲 |
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| 作者单位： | 天津城建大学天津市软土特性与工程环境重点实验室,天津300384 |
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| 基金项目： | 国家自然科学基金（41372291）; 天津市软土特性与工程环境重点实验室开放基金项目（2011SCEEKL007） |
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| 摘 要： | 地震引起的土体液化是导致地基失稳和上部结构受损的直接原因之一.利用美国GCTS空心圆柱扭剪仪,以天津地区海相可液化粉土为研究用土进行振动试验研究,对不同相位差的应力与孔隙水压力进行了分析,结果表明：双向动荷载不同相位差条件下动孔压增速不同,其中相位差为180°时孔压增长最快,相位差为0°和270°时孔压增长规律非常接近;土样在不同相位差双向动荷载作用下,相位差为180°时最先达到状态转换面,粉土振动最激烈、最先液化;围压、相位差对剪胀影响很小.
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| 关 键 词： | 双向振动三轴试验 饱和粉土 相位差 孔隙水压力 |
Study on the Pore Water Pressure of Saturated Silt in Two-directional Shock Test |
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| LIU Han-peng,WANG Zhe.Study on the Pore Water Pressure of Saturated Silt in Two-directional Shock Test[J].Journal of Tianjin Institute of Urban Construction,2014(4):232-236. |
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| Authors: | LIU Han-peng WANG Zhe |
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| Affiliation: | (Key Laboratory of Soft Soil Character and Engineering Environment of Tianjin, Tianjin Chengjian University, Tianjin 300384, China) |
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| Abstract: | The silt liquefaction caused by the earthquake is one of the most important reasons of the foundation invalidation and the upper structure collapse. This paper utilized GCTS to conduct a vibration test to the liquefaction silt in Tianjin. The curves of stress and pore water pressure in different phase angles were analyzed. The result indicated that the speed of the dynamic pore water pressure in different of phase angles changed. When the phase angle is 180 degrees,the increase was the fastest to the pore water pressure,and the silt vibration had the most violent and liquefied firstly. Meanwhile,confining pressure and phase difference had little impact on the dilatancy. |
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| Keywords: | two-directional cyclic triaxial tests saturated silt phase angle pore water pressure |
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