| Statistical Study on Cement-Soil Mixture Strength |
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| 作者姓名： | 于志强 曹永华 闫澍旺 |
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| 作者单位： | InstituteofGeotechnicalEngineering,TianjinUniversity,Tianjin300072,China |
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| 摘 要： | This paper presents an investigation on strength of cement deep mixing (CDM) mixture.Four typical works of offshore or land-based projects are introduced. With samples from these projects and laboratory tests, statistical analysis is made on the increment law of the strength of cement-soil mixture with different amount of cement, and strengths under different working conditions are compared. It is found that the amount of cement in the cement-soil mixture is closely related to the unconfined compressive strength of the mixture. At the age of 90 d,the unconfined compressive strength of the cement-soil mixture increased by 0.054 MPa-0.124MPa with each cement increasing 10 kg/m^3 in the cement-soil mixture, averagely increased by 0.085 MPa, while that at the age of 120 d increased by 11% in comparison. The quality of the cement-soil mixture should be comprehensively evaluated in accordance with the trimmed average of strength, coefficient of variation and rock quality designation (RQD) indicators of sampling ratio.
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| 关 键 词： | CDM混合物 取样 无约束压力 统计学分析 质量评估 水泥粘合剂 |
Statistical Study on Cement-Soil Mixture Strength |
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| Yu Zhiqiang,CAO Yonghua,Yan Shuwang.Statistical Study on Cement-Soil Mixture Strength[J].Transactions of Tianjin University,2005,11(3):223-229. |
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| Authors: | Yu Zhiqiang CAO Yonghua Yan Shuwang |
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| Abstract: | This paper presents an investigation on strength of cement deep mixing (CDM) mixture. Four typical works of offshore or land-based projects are introduced. With samples from these projects and laboratory tests, statistical analysis is made on the increment law of the strength of cement-soil mixture with different amount of cement, and strengths under different working conditions are compared. It is found that the amount of cement in the cement-soil mixture is closely related to the unconfined compressive strength of the mixture. At the age of 90 d,the unconfined compressive strength of the cement-soil mixture increased by 0.054 Mpa-0.124 Mpa with each cement increasing 10 kg/m3 in the cement-soil mixture, averagely increased by 0.085 Mpa, while that at the age of 120 d increased by 11% in comparison.The quality of the cement-soil mixture should be comprehensively evaluated in accordance with the trimmed average of strength, coefficient of variation and rock quality designation (RQD) indicators of sampling ratio. |
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| Keywords: | CDM mixture sampling unconfined compressive strength statistical analysis quality evaluation |
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