本文選題：高速公路 + 路面病害診斷　； 參考：《重慶交通大學(xué)》2015年碩士論文

【摘要】：隨著我國(guó)高速公路建設(shè)的快速發(fā)展,高速公路路面質(zhì)量服務(wù)需求日趨增長(zhǎng)。提供良好的路面維修決策成為高速公路養(yǎng)護(hù)管理的重點(diǎn)。如何對(duì)運(yùn)營(yíng)中的高速公路實(shí)施正確的養(yǎng)護(hù)維修、準(zhǔn)確的路面病害診斷和科學(xué)有效的養(yǎng)護(hù)決策成為高速公路養(yǎng)護(hù)工作的關(guān)鍵。本文依托廣西LB高速公路瀝青路面養(yǎng)護(hù)管理研究,LB高速公路于2005年底建成通車,至今已運(yùn)營(yíng)10年。目前,通過(guò)分析其路面技術(shù)狀況指標(biāo)PQI和PCI均達(dá)到優(yōu)良,路面總體路況良好。其養(yǎng)護(hù)與管理具有良好的借鑒意義。隨著使用年限的增加,LB高速公路路面性能整體呈下降趨勢(shì),通過(guò)對(duì)原路面現(xiàn)場(chǎng)調(diào)查分析,對(duì)其路面病害進(jìn)行了系統(tǒng)的總結(jié)和研究,原路面出現(xiàn)了縱向裂縫、車轍、坑洞和塊裂等典型病害。為恢復(fù)LB高速公路路面性能,提高道路服務(wù)水平,有效利用養(yǎng)護(hù)費(fèi)用,提出科學(xué)有效的養(yǎng)護(hù)對(duì)策。在對(duì)LB高速公路原路面進(jìn)行路面結(jié)構(gòu)及路面病害分析,總結(jié)得出主要的4種典型的路面病害類型:填方路段裂縫、車轍、塊裂及坑洞。首先,通過(guò)選取路面完好、嚴(yán)重車轍、塊裂和坑洞等4種典型病害路段進(jìn)行現(xiàn)場(chǎng)鉆芯取樣并利用車轍深度檢測(cè)、路表滲水檢測(cè)、FWD檢測(cè)、激光彎沉車檢測(cè)及室內(nèi)試驗(yàn)分析作出路面評(píng)估探究,得出早期路面病害產(chǎn)生原因主要是上面層孔隙率過(guò)大,導(dǎo)致水損害破壞,從而產(chǎn)生坑洞。80%芯樣的上水穩(wěn)基層底部松散,形成厚約20~35mm的軟夾層,動(dòng)荷載作用下上水穩(wěn)層達(dá)到疲勞極限而破壞,造成路面塊斷。瀝青層抗剪強(qiáng)度不足和第二期路面工程施工時(shí)中面層表面灑布的粘層瀝青過(guò)多造成嚴(yán)重車轍現(xiàn)象。然后,通過(guò)收集歷年交通量,調(diào)查當(dāng)前上行和下行斷面交通量和檢測(cè)車輛軸重及超載情況作出當(dāng)量軸次分析。同時(shí),通過(guò)室內(nèi)分析計(jì)算累計(jì)當(dāng)量標(biāo)準(zhǔn)軸載作用次數(shù),評(píng)定路面結(jié)構(gòu)強(qiáng)度,建立路面力學(xué)模型,計(jì)算路面結(jié)構(gòu)層荷載應(yīng)力,分析舊路面疲勞損傷和加鋪補(bǔ)強(qiáng)結(jié)構(gòu)疲勞壽命,得出病害路段上下水穩(wěn)層間含15mm松散夾層的路面,疲勞損傷已達(dá)68%,完全光滑疲勞損傷已達(dá)28%,上下水穩(wěn)層間粘結(jié)良好路面疲勞損傷為9.2%。最后,根據(jù)路面檢測(cè)評(píng)估和分析結(jié)果,針對(duì)4種不同的路面病害狀況提出維修對(duì)策:(1)PCI90和SSI10.78的路面,采取小修保養(yǎng)措施;(2)PCI90和SSI10.78的路段,路面水穩(wěn)層間可能存在松散夾層,應(yīng)予加鋪補(bǔ)強(qiáng);(3)上水穩(wěn)層底面松散,在上下水穩(wěn)層間形成20~35mm厚的軟弱夾層,上水穩(wěn)層底面的荷載拉應(yīng)力過(guò)大,多年行車后達(dá)到疲勞強(qiáng)度而破壞,應(yīng)挖除重鋪。
[Abstract]:With the rapid development of highway construction in China, the service demand of expressway pavement quality is increasing day by day. Providing good pavement maintenance decision has become the focus of highway maintenance and management. How to carry out correct maintenance, accurate pavement disease diagnosis and scientific and effective maintenance decision become the key of expressway maintenance. Based on the research of asphalt pavement maintenance and management of Guangxi LB Expressway, the LB Expressway was completed and opened to traffic at the end of 2005, and has been in operation for 10 years. At present, PQI and PCI are good, and the overall road condition is good. Its maintenance and management have good reference significance. With the increase of service life, the pavement performance of LB expressway presents a downward trend as a whole. Through the investigation and analysis of the original pavement, the pavement diseases are systematically summarized and studied, and the longitudinal cracks and ruts appear in the original pavement. Typical diseases such as potholes and cracks. In order to restore the pavement performance of LB Expressway, improve the level of road service and make effective use of maintenance expenses, scientific and effective maintenance countermeasures are put forward. Based on the analysis of pavement structure and pavement diseases of LB Expressway, four main types of pavement diseases are concluded: crack, rut, block crack and pothole. First of all, through the selection of four typical diseased sections, such as road surface intact, serious rutting, block crack and pit hole, the field core sampling and the detection of rut depth are carried out, and the road surface water seepage detection and FWD detection are carried out. Laser bending and sinking vehicle detection and laboratory test analysis to make pavement evaluation and research, it is concluded that the main cause of early pavement diseases is that the porosity of the upper layer is too large, resulting in water damage and destruction, thus producing poth.80% core sample of the bottom of the stable base. A soft interlayer of about 20~35mm thickness is formed, and under the action of dynamic load, the upper water stable layer reaches the fatigue limit and is destroyed, resulting in the breaking of the pavement mass. The insufficient shear strength of the asphalt layer and the excessive asphalt spread on the surface of the middle surface during the construction of the second phase of the pavement engineering cause serious rutting. Then, through collecting the traffic volume in the past years, investigating the current traffic volume on the uplink and downlink sections and measuring the axle load and overload of the vehicle, the equivalent axle times are analyzed. At the same time, through indoor analysis and calculation of accumulative equivalent standard axial loads, the strength of pavement structure is evaluated, the mechanical model of pavement is established, the load stress of pavement layer is calculated, the fatigue damage of old pavement and the fatigue life of overlay structure are analyzed. It is concluded that the fatigue damage of the pavement with 15mm loose interlayer between the upper and lower water-stabilized layers of the diseased section has reached 68 and the completely smooth fatigue damage has reached 280.The fatigue damage between the upper and lower water-stabilized layers is good and the fatigue damage is 9.2. Finally, according to the results of pavement inspection, evaluation and analysis, according to the four kinds of pavement disease situation, the paper puts forward the maintenance countermeasures: (1) the road surface of PCI90 and SSI10.78, and take minor maintenance measures, such as the road sections of the road, such as the section of the road surface, the pavement may have loose interlayers between the water-stable layer, and the pavement may have a loose interlayer between the layers of water and stability. The bottom surface of the upper water stabilizing layer is loose and the 20~35mm thick weak intercalation is formed between the upper and lower water stable layers. The load and tensile stress on the bottom surface of the upper water stabilizing layer is too large and it is destroyed by fatigue strength after many years of driving, so it should be excavated and repaved.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U416.217;U418.68

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