闽南海相沉积土水泥土的强度特性分析

Study on Marine Deposit Soft Soil Cement in South Fujian

根据闽南地区海相沉积土水泥搅拌桩工程的室内配方试验成果,分析水泥土的龄期、水泥掺量、土样含水量和土样种类对水泥土无侧限抗压强度的影响.研究表明,水泥土强度与龄期有关,28 d内强度增长较快,28~60 d的强度增长速率趋缓;水泥土的强度随着水泥掺量的增大而增大,两者基本呈线性关系;随着土样含水量的增加,粉喷桩水泥土强度明显降低;土的种类对水泥土强度的影响很大.最后,根据试验数据拟合出淤泥浆喷水泥土28 d和60 d强度的预测公式,并进一步估算其90 d强度.

Based on the laboratory results of cement soil of mixing pile in the marine deposited soils south Fujian,the influence of the age,cement content,water content and type of soil to the unconfined compression strength is studied.The results show that the cement soil strength is related with the age,the strength increases fast in the first 28 days,the increase rate slows down in 28 d to 60 d;the strength of cement soil is linearly related approximately to the cement content;with increase of soil water content,strength of cement soil of dry jet mixing pile（DJMP） decreases;soil type influences significantly the strength of cement soil.The prediction formulas of cement soil strength at 28 d and 60 d are fitted according to the tested data,which would estimate further the strength at 90 d.