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公路路基的强度和稳定性很大程度取决于路基填料的性质、压实时的含水量及其压实的程度。路基压实是一个人们较为熟悉、却又是非常复杂的实际工程难题,特别是对于细粒土,在我国现行路基规范中,压实质量的评定标准存在一些不足之处。目前,我国公路早期病害严重,除施工原因外,现行路基压实标准不当也是重要原因之一。影响路基工程性质的土体本身具有不均匀性和各向异性的特点,加之在投入使用过程中受环境条件变化的影响,因此为掌握压实路基的工程性能和保证长期稳定,需要对压实机理更深入地研究,需要研究在施工过程中如何采用合理的压实(包括室内试验和现场检测)以保证路基在使用过程中具有良好的强度与稳定性。本文以不同特性的几种代表性土样为主要研究对象,进行了比较系统的室内试验:研究了细粒土的特征参数与其对应的强度(回弹模量)之间的关系.
The strength and stability of highway subgrade depend largely on the nature of the subgrade filler, the moisture content at compaction and the degree of compaction. Subgrade compaction is a more familiar, but very complex practical engineering problems, especially for fine-grained soil, in our country’s existing subgrade code, compaction quality assessment standards there are some shortcomings. At present, the disease of road in our country is serious at an early stage. In addition to the construction reasons, the inappropriate standard of subgrade compaction is also one of the important reasons. The characteristics of subgrade engineering nature of the soil itself has the characteristics of heterogeneity and anisotropy, coupled with the process of being put into use by environmental conditions, so in order to grasp the engineering performance of subgrade compaction and to ensure long-term stability, the need for compaction A deeper study of the mechanism requires a study of how to apply reasonable compaction (including in-house tests and field tests) during construction to ensure good strength and stability of the subgrade during use. In this paper, several representative soil samples with different characteristics as the main research object, a comparatively systematic laboratory test was conducted: the relationship between the characteristic parameters of fine-grained soil and its corresponding strength (resilience modulus) was studied.