砂砾土抗液化强度的小型土箱振动台试验研究

王炳辉; 陈国兴; 孙田; 李小军

doi:10.11779/CJGE201511022

砂砾土抗液化强度的小型土箱振动台试验研究 English Version

1. 江苏科技大学土木工程与建筑学院,江苏镇江 212003;
2. 南京工业大学岩土工程研究所,江苏南京 210009;
3. 中国地震局地球物理研究所,北京 100081

基金项目: 国家自然科学基金项目（41172258）; 国家重点基础研究发展计划（“973”计划）项目（2011CB013601）; 国家科技重大专项项目（2011ZX06002-010-15）; 国家自然科学青年基金项目（51309121）; 江苏省基础研究计划青年基金项目（SBK20130463）

详细信息

作者简介:
王炳辉(1980- ),男,浙江新昌人,博士后,从事土动力学研究。E-mail: wbhchina@126.com。

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出版历程
- 收稿日期: 2014-09-07
- 发布日期: 2015-11-19

Liquefaction resistance of sand-gravel soils using small soil-box shaking table tests

1. School of Architecture and Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China;
2. Institute of Geotechnical Engineering, Nanjing Tech University, Nanjing 210009, China;
3. Institute of Geophysics, China Earthquake Administration, Beijing 100081

摘要

摘要: 近来数次大地震中出现大量的砂砾土液化震害,饱和砂砾土的地震液化问题越来越引起重视。针对砂砾土的抗液化强度问题,开展了4种砾含量、3种相对密度情况下,饱和砂砾土的小型土箱振动台试验研究。为获得较为合理的抗液化强度结果修正了由加速度计倾斜产生的加速度时程漂移,并描述了土体中加速度和动孔压发展特性。饱和砂砾土的抗液化强度结果显示：含砾量和相对密度对饱和砂砾土的抗液化强度均有明显影响。饱和砂砾土的抗液化强度随着含砾量和相对密度的增加明显增大,增大的趋势越来越明显,且明显高于相近相对密度的饱和砂土的抗液化强度。
- 砂砾土 /
- 抗液化强度 /
- 振动台试验 /
- 含砾量 /
- 相对密度
Abstract: Due to many cases of the liquefaction of sand-gravel soils induced by recent earthquakes, more and more attention is paid to the liquefaction of sand-gravel soils. Aiming at this problem, the small soil-box shaking table tests are performed using saturated sand-gravel soils with 4 kinds of gravel contents and 3 kinds of relative densities. In the process of analysis, firstly, the acceleration drift caused by the tilt of acceleration sensor is amended in order to obtain the rational results, and then the characteristics of the accelerations and dynamic pore water pressures (DPWP) are described. The results of the liquefaction resistance of the sand-gravel soil show that the gravel content and the relative density of the soil have obvious effects on the liquefaction resistance of sand-gravel soils. The more the gravel content and relative density, the greater the liquefaction resistances of the soils, and the greater the variances of liquefaction resistance. For similar relative density, the liquefaction resistances of saturated sand-gravel soils are obviously greater than those of saturated sand.
- sand-gravel /
- liquefaction resistance /
- shaking table tests /
- gravel content /
- relative density

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