高速公路半刚性基层沥青路面浅层注浆补强加固技术研究

发布时间：2018-01-16 09:35

本文关键词：高速公路半刚性基层沥青路面浅层注浆补强加固技术研究　出处：《长安大学》2014年硕士论文　论文类型：学位论文

【摘要】：由于传统的高速公路基层病害处理开挖施工难度大、工期长、成本高，对运营影响大且需临时封道。因此，，对公路半刚性基层结构病害采用非开挖式的方法，进行结构补强加固研究很有必要。本文以深圳机场至荷坳高速公路的基层结构加固补强项目为依托工程，利用工程调研、理论分析、先进检测手段、现场试验等多种方法，对高速公路半刚性基层沥青路面浅层注浆补强加固技术展开研究，提出了适合基层病害的处理方案，主要研究成果如下：（1）通过分析半刚性基层的破坏机理，结合预防性养护的特性，提出在基层结构发生损坏的正常使用阶段后期，以地聚合物为浅层注浆材料，对基层病害进行补强加固。（2）利用先进的探地雷达检测仪器，配合工业内窥镜和传统的病害检测手段，形成合理的检测路线，确定每一环节的检测目的，使得检测方法更具有针对性和闭合性。（3）遵循现有设计规范的原则，提出了适应浅层注浆的注浆设计与施工方案，并探索了动态弯沉质量验收评价指标。（4）通过在机荷高速公路试验段的处理效果的检验，总结了浅层注浆现场施工标准化流程要点，得到了浅层注浆配套的施工工艺，并验证了浅层注浆的补强加固技术既大幅提高了基层结构的承载力又经济实用。
[Abstract]:Because the traditional highway base course disease treatment excavation construction is difficult, the time limit is long, the cost is high, has the big influence to the operation and needs to seal the road temporarily, therefore, the highway semi-rigid base structure disease adopts the non-excavation method. It is necessary to study the reinforcement of the structure. This paper is based on the reinforcement project of the base structure from Shenzhen airport to Hehao au expressway, using engineering investigation, theoretical analysis and advanced testing means. Field test and other methods are carried out to study the reinforcement technology of shallow grouting of semi-rigid base asphalt pavement of expressway, and the treatment scheme suitable for base course disease is put forward. The main research results are as follows: 1) by analyzing the failure mechanism of semi-rigid base and combining the characteristics of preventive maintenance, it is put forward that the ground polymer is used as shallow grouting material in the later stage of normal service of base structure damage. Strengthen and reinforce the disease of base course. (2) using advanced ground penetrating radar detection instruments, with industrial endoscope and traditional disease detection means, to form a reasonable detection route and determine the detection purpose of each link. The detection method has more pertinence and closeness. In accordance with the principles of the existing design code, the design and construction scheme of grouting adapted to shallow grouting is put forward, and the evaluation index of dynamic deflection quality acceptance is explored. Through the test of the treatment effect in the test section of the machine load expressway, the main points of the standardization process of the field construction of shallow grouting are summarized, and the construction technology of the shallow grouting matching is obtained. It is verified that the strengthening and strengthening technology of shallow grouting not only improves the bearing capacity of the base structure but also is economical and practical.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.2;U412.366

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