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淤泥固化技术中国进行工程应用时经常遇到需要碾压施工的问题,碾压后固化淤泥的力学性质是亟需试验明确的问题。研究了击实对不同水泥添加量和不同养护龄期下固化淤泥的密度、干密度、CBR和无侧限抗压强度的影响规律。结果表明,击实过程中存在有效击实次数,超过此次数后不能使土体进一步密实,击实土能达到的密度、干密度基本与固化土的相等;击实土的CBR强度可以从固化土的CBR得到,且约为固化土的1/10,固化土的CBR性质能够满足作为路堤填土的要求,而击实土则不能;固化土的抗压强度越大,击实土的抗压强度也越高,但是击实土相对于固化土的强度损失也就越大,击实土的无侧限抗压强度为固化土的1/3～1/2。因此,应根据实际淤泥固化工程的特点,合理选择水泥、石灰或复合型固化材料,这方面研究还有待更深入地开展。
Sludge Curing Technology In China, the application of rolling construction is often encountered in engineering applications. The mechanical properties of the cured sludge after rolling are in urgent need of testing. The effects of compaction on the density, dry density, CBR and unconfined compressive strength of cured sludge under different cement additions and curing ages were studied. The results show that there are effective compaction times in the compaction process, and the soil compaction can not be further compacted after this number is reached. The compacted soil can reach the density and the dry density is basically equal to that of the hardened soils. The CBR strength of the compacted soils can be improved from curing The CBR of soil is obtained, which is about 1/10 of that of solidified soil. The CBR property of solidified soil can meet the requirement of embankment filling, but not solidified soil. The higher the compressive strength of solidified soil, The higher the compressive strength is, but the greater the strength loss of compacted soil relative to the solidified soil is. The unconfined compressive strength of compacted soil is 1/3 to 1/2 of that of cured soil. Therefore, cement, lime or composite curing materials should be selected reasonably according to the characteristics of the actual silt curing project, and further research on this area is needed.