灰土比和龄期对灰土抗剪性能影响的试验研究
发布时间：2018-07-21 10:12
【摘要】：通过对不同灰土比的灰土进行击实试验,得到了不同灰土比的最优含水率和最大干密度。根据击实试验得到的不同灰土比的最优含水率和最大干密度,进行了相应灰土比的标准养护7、28、90 d的灰土抗剪强度试验研究,分析了在相同击实功下,相同养护龄期时灰土比对抗剪强度的影响;根据库伦强度理论,建立了三个龄期抗剪强度的回归关系方程;分析了养护龄期、灰土比对灰土抗剪强度影响的规律。试验分析表明:随着石灰含量的增加,灰土的最大干密度减小;粘聚力和内摩擦角均与灰土比有很强的相关性;灰土粘聚力均随龄期的增长而增大,但不同灰土比增大的快慢不同;内摩擦角随养护龄期发生或增大或减小的变化;灰土抗剪强度随养护时间不断增长,工程中应尽可能利用其长期强度。
[Abstract]:The optimum moisture content and maximum dry density of different lime-soil ratio were obtained by compaction test of lime-soil with different lime-soil ratio. According to the optimum moisture content and maximum dry density of different lime-soil ratio obtained by compaction test, the shear strength of lime-soil with corresponding lime-soil ratio for 72890 days was studied, and the results were analyzed under the same compaction work. According to the theory of Coulomb strength, the regression equation of shear strength of three ages is established, and the law of the influence of lime-soil ratio on the shear strength of lime-soil at the same curing age is analyzed. The experimental results show that the maximum dry density of lime-soil decreases with the increase of lime content, the cohesion and the angle of internal friction are strongly related to the lime-soil ratio, and the cohesion of lime-soil increases with the increase of age. However, the increasing speed of different lime-soil ratio is different; the internal friction angle changes with curing age or increasing or decreasing; the shear strength of lime-soil increases continuously with curing time, so the long-term strength should be used as far as possible in engineering.
【作者单位】： 常州大学怀德学院;
【分类号】：TU521.3
[Abstract]:The optimum moisture content and maximum dry density of different lime-soil ratio were obtained by compaction test of lime-soil with different lime-soil ratio. According to the optimum moisture content and maximum dry density of different lime-soil ratio obtained by compaction test, the shear strength of lime-soil with corresponding lime-soil ratio for 72890 days was studied, and the results were analyzed under the same compaction work. According to the theory of Coulomb strength, the regression equation of shear strength of three ages is established, and the law of the influence of lime-soil ratio on the shear strength of lime-soil at the same curing age is analyzed. The experimental results show that the maximum dry density of lime-soil decreases with the increase of lime content, the cohesion and the angle of internal friction are strongly related to the lime-soil ratio, and the cohesion of lime-soil increases with the increase of age. However, the increasing speed of different lime-soil ratio is different; the internal friction angle changes with curing age or increasing or decreasing; the shear strength of lime-soil increases continuously with curing time, so the long-term strength should be used as far as possible in engineering.
【作者单位】： 常州大学怀德学院;
【分类号】：TU521.3
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