【摘要】：通過對不同灰土比的灰土進行擊實試驗,得到了不同灰土比的最優(yōu)含水率和最大干密度。根據(jù)擊實試驗得到的不同灰土比的最優(yōu)含水率和最大干密度,進行了相應灰土比的標準養(yǎng)護7、28、90 d的灰土抗剪強度試驗研究,分析了在相同擊實功下,相同養(yǎng)護齡期時灰土比對抗剪強度的影響;根據(jù)庫倫強度理論,建立了三個齡期抗剪強度的回歸關系方程;分析了養(yǎng)護齡期、灰土比對灰土抗剪強度影響的規(guī)律。試驗分析表明:隨著石灰含量的增加,灰土的最大干密度減小;粘聚力和內(nèi)摩擦角均與灰土比有很強的相關性;灰土粘聚力均隨齡期的增長而增大,但不同灰土比增大的快慢不同;內(nèi)摩擦角隨養(yǎng)護齡期發(fā)生或增大或減小的變化;灰土抗剪強度隨養(yǎng)護時間不斷增長,工程中應盡可能利用其長期強度。
[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.
【作者單位】： 常州大學懷德學院;
【分類號】：TU521.3

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