路基压实质量评价指标的研究
发布时间：2018-10-22 12:24
【摘要】：压实是道路建设非常重要的过程,被压实材料需要压实以确保路基承载能力、稳定性和强度。在施工过程中压实不足会引起道路渗水、车辙、开裂等;过压实会引起被压实材料遭到破坏。为了保证道路有良好的压实质量,在施工中必须严格控制路基压实质量,因此需要选择合适的压实质量评价指标和检测方法对压实路基进行质量控制。本文采用理论分析并结合相关试验的研究方法,归纳了一些压实质量物理评价指标——压实度、孔隙率、空气体积率、相对密度等,压实质量力学评价指标——动态变形模量、塑性变形增量、地基系数30K、承载比等,分析了压实质量物理评价指标之间的相关性,压实质量力学评价指标之间相关性,以及压实质量物理评价指标和力学评价指标之间的相关性。通过分析可以看出压实质量评价指标之间存在一定的相关性,因此,在压实施工中,应该根据压实材料的特性、施工工况合理的选择压实质量评价指标及检测方法,保证施工质量,提高施工效率。针对常用的压实质量评价指标——压实度及其检测技术介绍了一些传统检测方法,针对这些检测方法的局限性,重点说明了智能压实检测的优势及其各厂家和单位常用的智能压实检测指标,为工程施工人员选择合适的压实质量检测方法提供参考。针对实验室级配土路基进行低幅和高幅压实试验,对试验数据压实度、累积沉降量进行分析,提出了压实度与累积沉降量双指标控制级配土路基的压实质量;试验中还采集了不同压实遍数下不同深度的土压力信号,通过对土压力信号进行分析,得出了土压力可以作为压实质量评价的一种指标,为振动轮工作状态的监测和被压实材料的密实度评估提供了一种新的检测手段。
[Abstract]:Compaction is a very important process in road construction. Compaction materials need to be compacted to ensure the bearing capacity, stability and strength of roadbed. During construction, insufficient compaction will cause road seepage, rutting and cracking, and over-compaction will lead to the destruction of compacted materials. In order to ensure the good compaction quality of road, the compaction quality of roadbed must be strictly controlled in construction, so it is necessary to select appropriate evaluation index and testing method to control the quality of compacted roadbed. In this paper, some physical evaluation indexes of compaction quality, such as compactness, porosity, air volume ratio, relative density and dynamic deformation modulus, are summarized by means of theoretical analysis and related test. Plastic deformation increment, foundation coefficient 30K, bearing ratio, etc., the correlation of physical evaluation index of compaction quality and the correlation of mechanical evaluation index of compaction quality are analyzed. And the correlation between physical evaluation index of compaction quality and mechanical evaluation index. Through the analysis, we can see that there is a certain correlation between the evaluation index of compaction quality, therefore, in the compaction construction, according to the characteristics of compaction material, the evaluation index and testing method of compaction quality should be reasonably selected. Ensure construction quality and improve construction efficiency. In this paper, some traditional testing methods are introduced for compaction degree and its testing technology, and the limitations of these methods are pointed out. The advantages of intelligent compaction testing and the commonly used intelligent compaction testing indexes of various manufacturers and units are emphatically explained, which provides a reference for engineering construction personnel to select suitable compaction quality testing methods. Based on the low amplitude and high amplitude compaction tests of laboratory graded subgrade, the compaction degree and cumulative settlement of test data are analyzed, and the compaction quality of graded subgrade is controlled by both compactness and cumulative settlement. In the experiment, the earth pressure signals of different depth under different compaction times are collected, and through the analysis of the earth pressure signals, it is concluded that the earth pressure can be used as an index of compaction quality evaluation. It provides a new method for monitoring the working condition of vibration wheel and evaluating the compaction degree of compacted material.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.1
本文编号：2287147
[Abstract]:Compaction is a very important process in road construction. Compaction materials need to be compacted to ensure the bearing capacity, stability and strength of roadbed. During construction, insufficient compaction will cause road seepage, rutting and cracking, and over-compaction will lead to the destruction of compacted materials. In order to ensure the good compaction quality of road, the compaction quality of roadbed must be strictly controlled in construction, so it is necessary to select appropriate evaluation index and testing method to control the quality of compacted roadbed. In this paper, some physical evaluation indexes of compaction quality, such as compactness, porosity, air volume ratio, relative density and dynamic deformation modulus, are summarized by means of theoretical analysis and related test. Plastic deformation increment, foundation coefficient 30K, bearing ratio, etc., the correlation of physical evaluation index of compaction quality and the correlation of mechanical evaluation index of compaction quality are analyzed. And the correlation between physical evaluation index of compaction quality and mechanical evaluation index. Through the analysis, we can see that there is a certain correlation between the evaluation index of compaction quality, therefore, in the compaction construction, according to the characteristics of compaction material, the evaluation index and testing method of compaction quality should be reasonably selected. Ensure construction quality and improve construction efficiency. In this paper, some traditional testing methods are introduced for compaction degree and its testing technology, and the limitations of these methods are pointed out. The advantages of intelligent compaction testing and the commonly used intelligent compaction testing indexes of various manufacturers and units are emphatically explained, which provides a reference for engineering construction personnel to select suitable compaction quality testing methods. Based on the low amplitude and high amplitude compaction tests of laboratory graded subgrade, the compaction degree and cumulative settlement of test data are analyzed, and the compaction quality of graded subgrade is controlled by both compactness and cumulative settlement. In the experiment, the earth pressure signals of different depth under different compaction times are collected, and through the analysis of the earth pressure signals, it is concluded that the earth pressure can be used as an index of compaction quality evaluation. It provides a new method for monitoring the working condition of vibration wheel and evaluating the compaction degree of compacted material.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.1
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