Practical Use of Cone Penetration Test

锥入度试验的实际应用

• 批准号: 59850087
• 负责人: SHIBATA Toru
• 金额: $ 2.11万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1984
• 资助国家: 日本
• 起止时间: 1984 至 1985
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-59850087/
• 关键词: Cone penetration test; Liquefaction; Vibration; Pore water pressure; In-situ test; 土槽実験

(A) The field performance of sandy soil deposits during previous earthquakes was reviewed with emphasis on Static Cone Penetration Test qc-value, fines content and mean grain size. Based on the correlation between cyclic stress ratio and normalized <q_(c1)> -value, it was indicated that (1) extensive damage due to liquefaction would not occur for clean sands having <q_(c1)> -value greater than about 150 kgf/ <cm^2> and for the induced stress ratio due to earthquake less than 0.1, (2) sands containing more than 10 % fines or having mean grain size smaller than 0.25 mm show much greater in liquefaction resistance than clean sand having the same qc-value. Apart from that the empirical relationships separating liquefaction and non-liquefaction were proposed in terms of critical normalized ( <q_(c1)> )cr, critical (qc)cr, cyclic stress ratio, fines content and mean grain size.(B) A series of static cone penetration test and a newly developed vibro-cone penetration test were carried out on the loose saturated sand in a large calibration chamber. The effects of vertical stress, horizontal stress, rate of penetration and location of porous filter on the excess pore water pressure, static cone and vibro-cone resistance were observed. The static cone resistances estimated on the bases of spherical cavity expansion theory were compared with those from chamber test, and it could be seen that the predicted static cone resistance values agree well with observed one. The evaluation of soil stratigraphy and the correlations between cyclic stress ratio and vibro-cone resistance obtained from in-situ test were also presented.

(A)回顾了砂土在历次地震中的现场表现，重点介绍了静力触探试验的Qc值、细粒含量和平均粒度。基于循环应力比与归一化&lt；Q_(C1)&gt；值之间的相关性，结果表明：(1)当&lt；q_(C1)&gt；值大于150kgf/&lt；cm^2&gt；而地震诱发应力比小于0.1时，(2)细度大于10%或平均粒径小于0.25 mm的净砂，其抗液化能力明显高于相同Qc值的净砂。提出了液化与非液化的临界归一化(&lt；Q_(C1)&gt；)cr、临界(Qc)cr、循环应力比、细粒含量和平均粒径的经验关系式。(B)对松散饱和砂土进行了一系列静力触探试验和振动触探试验。考察了竖向应力、水平应力、贯入率和多孔滤层位置对超孔压、静力和振动力的影响。根据球腔膨胀理论估算的静锥阻力与室内试验的静锥阻力进行了比较，结果表明预测值与实测值吻合较好。文中还给出了土层评价和现场试验得到的循环应力比与振锥阻力的关系。

项目成果

京都大学防災研究所年報. 29-B. (1986)

京都大学防灾研究所年度报告29-B（1986）。

Annuals of Disaster Prevention Research Inst., Kyoto Univ.28-B. (1985)

京都大学防灾研究所年鉴28-B。

京都大学防災研究所年報. 28-B. (1985)

京都大学防灾研究所年度报告28-B（1985）。

Annuals of Disaster Prevention Research Inst., Kyoto Univ.29-B. (1986)

京都大学防灾研究所年鉴29-B。