Evaluation of Subgrade Compressive Strength by Shear Wave Velocity
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摘要: 为了保证路基的施工质量，以水泥改良粉土、粉质黏土为研究对象，通过室内三轴剪切和波速检测试验，研究了影响路基压缩强度与剪切波速的因素，证明了剪切波速与路基压缩强度的相关性，为路基品质检测提供了技术依据。研究发现：一定试验条件下路基压缩强度与剪切波速变化规律基本一致，压缩强度及剪切波速随水泥剂量、龄期的增加逐渐提高；当黏粒含量范围为18%~22%时，改良土强度及波速较大。研究结果为路基的品质检测提供了技术依据。Abstract: In order to ensure the quality of subgrade construction, this paper takes cement modified silty clay and silty clay as the research object. Through the indoor tri-axial shearing and wave velocity detection test, the factors affecting the compressive strength and shear wave velocity of the subgrade are studied, and the correlation between them is proved, which provides a technical basis for roadbed quality inspection. The study found that under certain test conditions, the change tendencies of compressive strength of the subgrade and the shear wave velocity are basically the same. The strength and wave velocity increase with the increase of cement dosage and age. When the clay content is 18%~22%, the strength and wave velocity of the improved soil are larger. The research results provide technical basis for roadbed quality detection.
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Keywords:
- subgrade /
- compressive strength /
- shear wave velocity /
- feasibility
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