發(fā)布時間：2018-04-14 17:40

  本文選題：路面快速修補 + 坑槽噴補工藝��； 參考：《長安大學》2014年碩士論文

【摘要】：隨著我國高等級公路的建成和高速發(fā)展，交通量日益增加，重載超載現(xiàn)象普遍存在，加上自然災害對公路的破壞，養(yǎng)護工作已顯得越來越重要，其中坑槽病害等是高等級公路普遍存在的現(xiàn)象，研究快速高效的坑槽修補方法迫在眉睫。目前歐美發(fā)達國家已經(jīng)通過多年的試驗研究，證實噴射式修補方法是一種快速、低耗并且有效的坑槽修補方法，但是，我國對此所做的研究較少。在這樣的背景下，本文從系統(tǒng)的角度出發(fā)，主要研究了適合噴射法作業(yè)的材料、工藝、設備以及關(guān)鍵技術(shù)，旨在引進吸收這種新型的坑槽修補技術(shù)。 通過對現(xiàn)有主要的坑槽修補方法的比較分析，，確定噴射式坑槽修補方法的可行性以及優(yōu)點。針對這種新型的坑槽修補技術(shù)，本文首先研究了其工藝過程，其次依據(jù)工藝要求介紹了整機的關(guān)鍵系統(tǒng)，最后對其氣力輸送系統(tǒng)進行了理論分析，并對氣固噴射器進行了仿真優(yōu)化，具體如下。 一、針對工藝特點，確定適合噴射的修補材料，制定噴射式坑槽修補方法的工藝步驟。結(jié)合工藝特點，從提高坑槽修補質(zhì)量的角度出發(fā)，分析適合噴射修補的黏結(jié)劑、乳化瀝青和集料。 二、依據(jù)噴射式修補方法的工藝步驟，為實現(xiàn)各個工藝操作的有效執(zhí)行，確定該修補方法所需的關(guān)鍵系統(tǒng)，研究關(guān)鍵子系統(tǒng)的原理及要求，確定關(guān)鍵子系統(tǒng)的內(nèi)在聯(lián)系及整機動力路線。 三、以氣力輸送理論為基礎，以Matlab為計算工具，利用龍格庫塔法求解了氣力輸送的運動微分方程，分析了不同因素對輸送特性的影響；提出了適合噴射式修補方法氣力輸送系統(tǒng)輸送效率的評價指標，研究了直管道氣力輸送系統(tǒng)在不同條件下氣流速度、壓強、混合比和管道內(nèi)徑對工作效率的影響。在此基礎上設計計算了輸送管道及氣固噴射器。 四、以計算流體力學軟件Fluent為工具，利用歐拉模型對氣固噴射器進行了兩相流仿真，對比分析了仿真結(jié)果和理論計算的差別及其原因；通過不同結(jié)構(gòu)的氣固噴射器的仿真對比，分析了影響氣力輸送性能的內(nèi)在因素，并對氣固噴射器進行了仿真優(yōu)化。
[Abstract]:With the construction and high speed development of high grade highway in our country, the traffic volume is increasing day by day, the phenomenon of heavy load and overload exists widely, and the natural disasters destroy the highway, so the maintenance work has become more and more important.Pothole disease is a common phenomenon in high-grade highway, so it is urgent to study a fast and efficient method for repairing potholes.At present, the developed countries in Europe and the United States have proved that the jet repair method is a fast, low consumption and effective pothole repair method through many years of experimental research. However, our country has done less research on it.Under this background, this paper mainly studies the materials, technology, equipment and key technologies suitable for jet operation from the point of view of system. The purpose of this paper is to introduce this new type of pit repair technology.By comparing and analyzing the main methods of pothole repair, the feasibility and advantages of jet method are determined.In view of this new type of pothole repair technology, this paper first studies its technological process, secondly introduces the key system of the whole machine according to the technological requirements, and finally carries on the theoretical analysis to its pneumatic conveying system.The gas-solid injector is simulated and optimized as follows.The main contents are as follows: 1. According to the characteristics of the process, the suitable repairing materials are determined, and the process steps of the jet pit repair method are worked out.From the point of view of improving the quality of pothole repair, the adhesive, emulsified asphalt and aggregate suitable for jet patching are analyzed.Secondly, according to the technological steps of the spray repair method, in order to realize the effective execution of each process operation, the key system needed for the repair method is determined, and the principle and requirements of the key subsystem are studied.Determine the internal relationship of the key subsystems and the overall power line.Thirdly, on the basis of pneumatic conveying theory and Matlab as calculation tool, the differential equation of motion of pneumatic conveying is solved by Runge-Kutta method, and the influence of different factors on transport characteristics is analyzed.This paper presents an evaluation index for the conveying efficiency of pneumatic conveying system suitable for jet repair method, and studies the effects of airflow velocity, pressure, mixing ratio and pipeline inner diameter on the working efficiency of the pneumatic conveying system of straight pipeline under different conditions.On this basis, the pipeline and gas-solid injector are designed and calculated.Fourthly, using the computational fluid dynamics software Fluent as the tool, the two-phase flow simulation of gas-solid injector is carried out by using Eulerian model, the difference between simulation results and theoretical calculation and the reasons are analyzed, and the simulation comparison of gas-solid ejector with different structures is made.The internal factors affecting the pneumatic conveying performance are analyzed, and the simulation optimization of the gas-solid injector is carried out.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U418.6;U416.217

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本文編號：1750396