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通过不同掺量胶凝材料的静动力三轴试验,研究了胶凝砂砾石料的静、动力力学和变形特性,试验结果表明随着胶凝材料掺入量的增加,胶凝砂砾石试样的应力应变曲线逐渐由非线性向线弹性转变,其力学特性宏观上由弹塑性逐渐转变为线弹性,因此采用土工试验测试方法开展其力学特性的研究工作是适宜的。胶凝砂砾料的静、动力力学指标随着胶凝材料掺入量和养护天数的增加产生一定的提高,但增加量随着胶凝材料掺入量的提高而逐渐减缓;胶凝砂砾料的动力残余变形发展过程曲线宏观上与纯砂砾料保持相似,大体上仍符合半对数衰减规律,随围压、固结应力以及动应力的提高,其动永久变形量相应增大,仍可采用沈珠江提出的动力残余变形公式进行描述。
The static and dynamic mechanical properties and deformation characteristics of the cemented sand and gravel were studied by static and dynamic triaxial tests with different amounts of cementitious material. The experimental results show that with the increase of cementitious material incorporation, The stress-strain curve gradually changes from non-linear to linear elastic, and its mechanical properties are gradually changed from elastic-plastic to linear elastic. Therefore, it is appropriate to use geotechnical test method to study its mechanical properties. The static and dynamic mechanical indexes of the agglomerated sand gravel increase with the increase of the amount of cementitious material and the number of curing days, but the increase gradually decreases with the increase of the amount of cementitious material. The process curve of dynamic residual deformation remains macroscopically similar to that of pure sand and gravel, and generally still follows the law of semi-logarithm decay. With the increase of confining pressure, consolidation stress and dynamic stress, the dynamic permanent deformation increases correspondingly and can still be used Shen Zhujiang proposed power residual deformation formula is described.