镁质水泥复合固化剂固化有机质土的抗压强度模型

为了给实际工程中镁质水泥复合固化剂对有机质土的加固效果提供评价依据，以镁质水泥固化土（TZ18固化土）的无侧限抗压强度作为评价指标，分别研究有机质、水、固化剂的质量分数以及龄期对无侧限抗压强度的影响规律. 结果表明：TZ18固化土的无侧限抗压强度随有机质质量分数的增加呈二次函数形式降低，随水和固化剂质量分数的增加分别呈幂函数形式降低和提高，随龄期的增加呈自然对数形式增长. 基于此规律，建立TZ18固化土的抗压强度预测模型. 算例分析表明，该模型能较好地预测任意有机质、水、固化剂的质量分数以及龄期下的TZ18固化土的无侧限抗压强度.

Model of compressive strength of cured organic soil solidified by magnesium cement complex curing agent

In order to provide evaluation basis for the solidification effect of cured organic soil solidified by the magnesium cement complex curing agent in practical engineering, the unconfined compressive strength of the magnesium-cement cured soil (TZ18 cured soil) was taken as the evaluation index, and the influences of the mass fraction of organic matter, water and curing agent and the age on the unconfined compressive strength were investigated. Results showed that the unconfined compressive strength of the TZ18 cured soil decreased in quadratic function with the increase of organic matter mass fraction and reduced in power function with the increase of water mass fraction, whereas increased in power function with the increase of cured agent mass fraction and enhanced in natural logarithm function with the growth of age. Based on the above tested results, a forecast model of the comprehensive compressive strength of TZ18 cured organic soil was developed. Example analysis indicated that the proposed model can predict the unconfined compressive strength of TZ18 cured soil at any mass fraction of organic matter, water and curing agent as well as age.