软土地基水泥土工程性质的试验研究

Study on engineering properties of soft soil cement and its influencing factors on experiment

针对3种不同含水量的软土试样进行了水泥土配方试验,测试水泥土的强度、重度和弹性模量,并分析了各影响因素对强度的影响.通过研究发现:水泥土强度随龄期、水泥掺量的增大而增大,随土体含水量增大而降低,水泥土在前28d强度随龄期增长速度较快,28～90d内增长速度减缓,28d强度约是90d时的70%～80%;水泥土重度比原状土增大约7%～9%;水泥土的弹性模量为水泥土抗压强度的94～214倍,且水泥掺量越大,倍数越大.最后依据本文测试结果得到了水泥土强度预测公式,可为同类工程参考.

Three soft soil samples with different water contents added with cement, the strength, gravity density, and elastic modulus of cement-soil are tested, and the influencing factors on strength are analyzed. Some conclusions are drawn： the strength of cement-soil increases with age and increase of cement content, and decrease with soil water content in- crease. The strength grows faster in the former 28 days, and slowly between 28 d to 90 d, and the strength at 28 d is about 70%-80% of those at 90 d~ the gravity density of cement- soil is larger than 7%--9% of those of the undisturbed soil; the elastic modulus of the ce- ment soil are 94-214 times of the compressive strength, and the greater the cement content, the greater times. Finally, according to the test results of cement soil strength, some predic- tion formulas are to be a reference for similar projects.