长大隧道露石水泥混凝土路面修筑技术研究

发布时间：2018-05-04 06:48

本文选题：长大隧道水泥混凝土路面 + 关键施工技术　；参考：《长沙理工大学》2014年硕士论文

【摘要】：水泥混凝土路面具有强度高、稳定性和耐久性好等优点,在国内外公路隧道路面建设中被大量使用。然而长大隧道水泥混凝土路面抗滑持久性差、噪声大的缺陷却长期困扰着各国道路工作者。随着我国高速公路建设向山区进一步发展,隧道占建设路线的比例越来越大,在隧道中修建噪声低、抗滑性能好的水泥路面,特别是在长大隧道里修建低噪声、高抗滑的水泥路面,对提高隧道路面的行车舒适性、安全性,从而提高整个隧道使用的安全性和舒适性具有重要的意义。本文针对长大隧道特殊的内部行车环境,通过室内模拟试验和试验路段铺筑对露石水泥混凝土路面的关键施工技术、路用性能和试验路应用进行了系统的研究。首先,分析露石混凝土路面与传统水泥砼路面的异同,提出露石混凝土原材料和配合比的一些特殊要求,并在此原则下确定露石混凝土路面室内试验研究的配合比。通过模拟长大隧道内部环境研究露石剂喷洒时间和露石表面冲洗时间与温度的关系,通过露石混凝土表面抗滑指标确定露石剂的用量范围,为长大隧道露石路面施工提供技术支撑。通过室内试验探索露石路面抗滑、降噪性能的影响因素,发现公称最大粒径相同的粗集料级配,在相同露石剂用量下,粗集料级配偏粗露石深度、构造深度和抗滑值等指标偏高,但粗集料级配粗细对露石表面抗滑耐久性影响不大；在相同露石剂用量下,随着粗集料公称最大粒径的增大,露石表面的露石深度、构造深度和抗滑值等指标有明显提高,但是行车会噪声增大,路表抗滑耐久性随着粗集料公称最大粒径的增大略有下降。凝灰岩、玄武岩和花岗岩三种不同的粗集料对露石路面的露石深度、构造深度、露石度和行车噪声水平没有明显的影响,三种不同碎石的露石路面抗滑耐久性差别较大,花岗岩抗滑耐久性最好,玄武岩次之,凝灰岩最差。通过实体试验路的铺筑,完善了露石水泥混凝土路面施工技术,验证了露石混凝土路面相比传统水泥混凝土路在抗滑和降噪两方面的优越性。
[Abstract]:Cement concrete pavement is widely used in highway tunnel pavement construction at home and abroad because of its high strength, stability and durability. However, the long tunnel cement concrete pavement has long been plagued by road workers because of its poor durability and high noise. With the further development of highway construction into mountainous areas in China, the proportion of tunnels in the construction route is increasing. The construction of cement pavement with low noise and good anti-skid performance in the tunnel, especially in the long tunnel, is becoming more and more important. The high skid resistant cement pavement is of great significance to improve the driving comfort and safety of the tunnel pavement and thus improve the safety and comfort of the whole tunnel. In view of the special internal driving environment of long and long tunnel, the key construction technology, road performance and test road application of exposed stone cement concrete pavement are systematically studied through indoor simulation test and test road paving. Firstly, the similarities and differences between the exposed concrete pavement and the traditional cement concrete pavement are analyzed, and some special requirements of the raw material and the mix ratio of the exposed stone concrete pavement are put forward, and the matching ratio of the exposed stone concrete pavement is determined under this principle. Through simulating the internal environment of the long tunnel, the relationship between the spray time and the washing time of the exposed stone surface and the temperature is studied, and the dosage range of the exposed stone agent is determined by the anti-slip index on the surface of the exposed stone concrete. It provides technical support for the construction of exposed stone pavement of long and long tunnel. Through the laboratory test, the factors influencing the anti-slip and noise reduction performance of the roadway are explored. It is found that the coarse aggregate gradation with the same nominal maximum particle size and the same amount of the exposed stone agent, the coarse aggregate gradation is deviated to the coarse exposed stone depth. The structural depth and anti-slip value are higher, but the coarse aggregate gradation has little effect on the anti-slip durability of the exposed stone surface, and with the increase of the nominal maximum particle size of the coarse aggregate, the exposed rock depth on the exposed rock surface is increased. The structural depth and the value of anti-slip are obviously increased, but the traffic noise will increase, and the anti-slip durability of road surface decreases slightly with the increase of the nominal maximum particle size of coarse aggregate. Three kinds of coarse aggregates, tuff, basalt and granite, have no obvious influence on the exposed depth, structure depth, exposed rock degree and driving noise level of the exposed stone pavement, and there are great differences in the skid resistance and durability of the three kinds of gravel pavement. Granite has the best anti-slip durability, followed by basalt and tuff. Through the paving of solid test road, the construction technology of exposed stone cement concrete pavement is perfected, and the superiority of exposed stone concrete pavement compared with traditional cement concrete road in both anti-slide and noise reduction is verified.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.216

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