超大粒径块石填筑路堤施工工艺研究
发布时间：2019-02-17 14:46
【摘要】：山区路堤填筑材料缺乏,是目前山区道路修建过程中遇到的普遍问题。与此同时,开凿隧道和挖方产生的大量超大粒径块石由于粒径过大无法使用被弃置浪费,破坏生态环境。本文通过采用布放施工工艺研究超大粒径块石填筑路堤可行性,分析超大粒径块石布放的具体参数,确定了超大粒径块石的布放方案和工艺,并对其他施工工艺进行了优化。本文的主要研究内容和研究成果包括如下五个方面:(1)通过布放工艺研究超大粒径块石填筑路堤的可行性,通过实验和数值模拟研究超大粒径块石对路基压实的影响以及超大粒径块石位置对路基稳定性的影响。最终试验路现场检测和沉降观测证明含超大粒径块石路堤质量合格,超大粒径块石可用于路堤修筑。(2)通过分析室内试验和数值模拟数据得出结论,在控制超大粒径块石的间距大于夯实机具尺寸的情况下,可保证路基填料的压实。同时室内试验实验结果表明超大粒径块石周围并不存在难以压实的松散区域。(3)分析基于车辆动荷载下超大粒径块石的最小埋置深度。为保证含超大粒径块石路堤稳定性,通过研究车辆震动荷载对道路影响,确定基于动荷载影响下半刚性路面的路基工作区,来确定超大粒径块石布放时距离路基顶面的最小距离。最终确定在一般高速公路路面设计结构层情况下,超大粒径块石距离路基顶面最小高度为1.5m,即路基顶面以下1.5m范围内不能布放超大粒径块石。(4)研究超大粒径块石在路基中的布放参数,分析了超大粒径块石的最佳层位布放和填筑方式,探讨了超大粒径块石在路基中水平和竖直方向的位置关系;以边坡安全系数为指标,分析了边坡处超大粒径块石的位置对路基稳定性的影响。结合以上布放参数,在考虑施工便宜性的基础上,确定了超大粒径块石在路堤填筑中的布放施工方案。(5)针对超大粒径块石的特点,研究设计了超大粒径布放的施工工艺,优化了分层摊铺、整平和碾压等施工工艺,并对含超大粒径块石路堤施工质量的检测方法进行了研究。
[Abstract]:The lack of materials for embankment construction in mountainous areas is a common problem in the construction of mountain roads. At the same time, a large number of super-sized stones produced by tunneling and excavating can not be used and wasted because of their large size, and the ecological environment is destroyed. In this paper, the feasibility of filling embankment with large diameter block stone is studied by using placement construction technology, the concrete parameters of large diameter block stone placement are analyzed, the layout scheme and technology of large size block stone are determined, and other construction techniques are optimized. The main research contents and results of this paper include the following five aspects: (1) the feasibility of filling embankment with large diameter block stone is studied by placement technology. Through experiments and numerical simulation, the influence of large diameter block stone on roadbed compaction and the influence of large diameter block stone position on roadbed stability are studied. The site test and settlement observation of the final test road prove that the quality of the embankment containing large diameter block stone is up to standard, and the large diameter block stone can be used in the construction of embankment. (2) by analyzing the indoor test and numerical simulation data, the conclusion is drawn. The compaction of roadbed fillers can be ensured by controlling the spacing of large diameter blocks larger than the size of ramming machines. At the same time, the results of laboratory tests show that there is no loose area around the super-sized block stone. (3) the minimum burial depth of super-large size block stone under vehicle dynamic load is analyzed. In order to ensure the stability of embankment with large diameter stone, the subgrade working area of semi-rigid pavement under the influence of dynamic load is determined by studying the influence of vehicle vibration load on road. To determine the minimum distance from the top of the roadbed when the large diameter block is placed. Finally, it is determined that the minimum height from the top surface of the roadbed is 1.5 m under the condition of the general expressway pavement design structure layer. That is to say, it is not possible to place super-sized block stones within 1.5 m below the top surface of roadbed. (4) the distribution parameters of super-large size block stones in the roadbed are studied, and the optimum layout and filling mode of super-large diameter massive stones are analyzed. The relationship between horizontal and vertical direction of large-sized block stone in roadbed is discussed. Taking the safety factor of slope as the index, the influence of the location of large diameter stone on the stability of roadbed is analyzed. Based on the above layout parameters and considering the low cost of construction, the construction scheme of super-large diameter block stone in embankment filling is determined. (5) according to the characteristics of super-large diameter block stone, the construction technology of super-large diameter block stone is studied and designed. The construction techniques such as layering spreading leveling and rolling are optimized and the inspection method of construction quality of embankment with large diameter stone is studied.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.12
本文编号：2425277
[Abstract]:The lack of materials for embankment construction in mountainous areas is a common problem in the construction of mountain roads. At the same time, a large number of super-sized stones produced by tunneling and excavating can not be used and wasted because of their large size, and the ecological environment is destroyed. In this paper, the feasibility of filling embankment with large diameter block stone is studied by using placement construction technology, the concrete parameters of large diameter block stone placement are analyzed, the layout scheme and technology of large size block stone are determined, and other construction techniques are optimized. The main research contents and results of this paper include the following five aspects: (1) the feasibility of filling embankment with large diameter block stone is studied by placement technology. Through experiments and numerical simulation, the influence of large diameter block stone on roadbed compaction and the influence of large diameter block stone position on roadbed stability are studied. The site test and settlement observation of the final test road prove that the quality of the embankment containing large diameter block stone is up to standard, and the large diameter block stone can be used in the construction of embankment. (2) by analyzing the indoor test and numerical simulation data, the conclusion is drawn. The compaction of roadbed fillers can be ensured by controlling the spacing of large diameter blocks larger than the size of ramming machines. At the same time, the results of laboratory tests show that there is no loose area around the super-sized block stone. (3) the minimum burial depth of super-large size block stone under vehicle dynamic load is analyzed. In order to ensure the stability of embankment with large diameter stone, the subgrade working area of semi-rigid pavement under the influence of dynamic load is determined by studying the influence of vehicle vibration load on road. To determine the minimum distance from the top of the roadbed when the large diameter block is placed. Finally, it is determined that the minimum height from the top surface of the roadbed is 1.5 m under the condition of the general expressway pavement design structure layer. That is to say, it is not possible to place super-sized block stones within 1.5 m below the top surface of roadbed. (4) the distribution parameters of super-large size block stones in the roadbed are studied, and the optimum layout and filling mode of super-large diameter massive stones are analyzed. The relationship between horizontal and vertical direction of large-sized block stone in roadbed is discussed. Taking the safety factor of slope as the index, the influence of the location of large diameter stone on the stability of roadbed is analyzed. Based on the above layout parameters and considering the low cost of construction, the construction scheme of super-large diameter block stone in embankment filling is determined. (5) according to the characteristics of super-large diameter block stone, the construction technology of super-large diameter block stone is studied and designed. The construction techniques such as layering spreading leveling and rolling are optimized and the inspection method of construction quality of embankment with large diameter stone is studied.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.12
【参考文献】
相关期刊论文 前1条
1 董云;;土石混合料强度特性的试验研究[J];岩土力学;2007年06期
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