【摘要】：路基是公路的重要組成部分,其質(zhì)量的好壞直接決定了公路的使用性能和使用壽命。隨著自然環(huán)境和行車荷載的影響,在公路運(yùn)營(yíng)過程中,路基狀況難免會(huì)出現(xiàn)各種各樣的問題。為了對(duì)路基狀況進(jìn)行探測(cè)和評(píng)價(jià),傳統(tǒng)的檢測(cè)一般采用鉆孔和開挖的方式對(duì)路基土進(jìn)行取樣,然后對(duì)采集的資料進(jìn)行處理,評(píng)價(jià)路基的狀況。由于這種傳統(tǒng)的檢測(cè)方法效率低,對(duì)公路損壞大,而且難以應(yīng)用與運(yùn)營(yíng)公路,隨著科技的進(jìn)步,無損檢測(cè)開始得到發(fā)展,探地雷達(dá)技術(shù)逐步引入公路路基的探測(cè),該技術(shù)可用于探測(cè)地下埋設(shè)物、地下空洞等等,并且分辨力高、精度高。故本文將研究探地雷達(dá)對(duì)路基探測(cè)方法的應(yīng)用,主要研究成果如下：(1)基于探地雷達(dá)的測(cè)試要求以及運(yùn)營(yíng)公路的探測(cè)要求,開展了探地雷達(dá)用于公路路基探測(cè)的可行性分析。(2)分析了探地雷達(dá)探測(cè)參數(shù)對(duì)探測(cè)效果的影響,并基于大量的試驗(yàn),提出了探地雷達(dá)用于公路路基狀況探測(cè)的參數(shù)優(yōu)化配置方案,有效地提高了探測(cè)的效果。(3)提出了探地雷達(dá)探測(cè)公路路基的基本流程。首先對(duì)公路路基進(jìn)行定期普查,并提出快速探測(cè)要求,對(duì)探測(cè)數(shù)據(jù)進(jìn)行數(shù)據(jù)處理,最終提交路基定期檢查報(bào)告。實(shí)現(xiàn)了探地雷達(dá)用于公路路基探測(cè)的規(guī)范化管理。(4)針對(duì)層狀介質(zhì)中探地雷達(dá)反演的解譯優(yōu)化方法,基于大量的設(shè)想和試驗(yàn),提出了探地雷達(dá)加權(quán)后投影成像方法以及對(duì)兩層介質(zhì)中目標(biāo)的快速后向投影成像方法,并通過模擬實(shí)驗(yàn)證明了所提出的新的成像技術(shù)在很大程度上提高了探地雷達(dá)探測(cè)公路路基的效率和精度。應(yīng)用探地雷達(dá)參與了高速公路路基病害的探測(cè)實(shí)例,進(jìn)一步驗(yàn)證了探地雷達(dá)探測(cè)公路路基的可行性。
[Abstract]:Roadbed is an important part of highway, its quality directly determines the performance and service life of highway. With the influence of natural environment and traffic load, various problems will inevitably appear in the roadbed condition in the course of highway operation. In order to detect and evaluate the condition of roadbed, the traditional method of testing is to sample subgrade soil by drilling and excavation, and then process the collected data to evaluate the condition of roadbed. With the development of science and technology, nondestructive testing has been developed, and ground penetrating radar (GPR) technology has been gradually introduced into the detection of highway subgrade, because of the low efficiency of the traditional detection method, the great damage to the highway, and the difficulty of applying and operating the highway. This technique can be used to detect underground buried objects, underground cavities and so on, with high resolution and accuracy. Therefore, this paper will study the application of ground penetrating radar to roadbed detection, the main research results are as follows: (1) based on the test requirements of GPR and the detection requirements of operational highway, The feasibility analysis of GPR used in highway roadbed detection is carried out. (2) the influence of GPR detection parameters on the detection effect is analyzed, and based on a large number of experiments, This paper puts forward a parameter optimal configuration scheme of ground penetrating radar used in highway roadbed condition detection, which effectively improves the detection effect. (3) the basic flow chart of GPR detecting highway roadbed is put forward. First, the highway roadbed is surveyed regularly, and the requirement of rapid detection is put forward, and the data of detecting data is processed, and finally the periodic inspection report is submitted to the roadbed. The standardized management of ground penetrating radar used in highway subgrade detection is realized. (4) aiming at the interpretation and optimization method of ground penetrating radar inversion in layered media, based on a large number of assumptions and experiments, A weighted backprojection imaging method for ground penetrating radar (GPR) and a fast backward projection imaging method for targets in two layers of media are proposed. The simulation results show that the proposed new imaging technique can greatly improve the efficiency and accuracy of the ground penetrating radar (GPR) in detecting highway roadbed. The application of ground penetrating radar (GPR) to the detection of highway roadbed diseases is an example, which further verifies the feasibility of GPR in detecting highway roadbed.
【學(xué)位授予單位】：長(zhǎng)沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U416.1
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本文編號(hào)：2297435