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本文作者曾在1976年处理建筑物地基湿陷事故中利用氢氧化钠溶液加固过湿陷性黄土,加固后,当时效果较好。七年后,在原加固土体不同部位采取了原状试样60余件,测定其无侧限抗压强度。试验结果表明,以NaOH溶液加固过的湿陷性黄土,其强度有明显增长,7年后平均无侧限抗压强度可达5.7～6.3kg/cm~2。(最高可达18.3kg/cm~2),比类似土质及相同加固条件下的一个月龄期强度,平均增长1.7～2.0倍。
The author of this paper used sodium hydroxide solution to reinforce over-constrained loess during the collapse of buildings in 1976. After reinforcement, the effect was better. Seven years later, more than 60 undisturbed samples were taken from different parts of the original reinforced soil to determine its unconfined compressive strength. The test results show that the strength of collapsible loess reinforced with NaOH solution has a significant increase, and the average unconfined compressive strength after 7 years can reach 5.7-6.3 kg/cm~2. (Up to 18.3 kg/cm~2), an average increase of 1.7 to 2.0 times compared to the one-month age strength of similar soils and the same reinforcement.