本文選題：襯砌裂縫 + 裂縫分類��； 參考：《西南交通大學(xué)》2015年碩士論文

【摘要】：隨著我國經(jīng)濟(jì)的飛速發(fā)展,對(duì)交通工程的需求不斷增大,鐵路、公路、市政等基礎(chǔ)設(shè)施的修建速度相應(yīng)增快。近些年國內(nèi)建設(shè)了大量的高速鐵路、公路,為保證線路的平順性,盡量減少曲線,在線路穿越山地丘陵地帶時(shí),基本是以橋梁和隧道的形式通過,因此導(dǎo)致橋梁和隧道占整個(gè)線路的比例不斷升高,高者甚至達(dá)到90%。在隧道的營運(yùn)過程中,隧道內(nèi)車輛高速運(yùn)營引起的振動(dòng)、大幅快速降溫,溫度變化導(dǎo)致的熱脹冷縮,以及特殊地層膨脹而施加在結(jié)構(gòu)上的額外荷載等都可能導(dǎo)致隧道混凝土襯砌產(chǎn)生裂縫。裂縫會(huì)極大的降低混凝土結(jié)構(gòu)物的承載能力、防水性及耐久性。如果襯砌裂縫引發(fā)襯砌混凝土發(fā)生掉快,那便會(huì)在很大程度上威脅隧道的安全運(yùn)營。鑒于目前的情形,對(duì)隧道襯砌裂縫病害進(jìn)行分析及分類整治就愈顯緊迫與重要。本文在前人以長度、寬度為依據(jù)對(duì)隧道襯砌裂縫進(jìn)行分類的基礎(chǔ)上,綜合考慮了裂縫的走向及涌漏水情況,對(duì)隧道襯砌裂縫病害進(jìn)行了深入研究,得到成果如下：1.現(xiàn)有的隧道裂縫評(píng)定標(biāo)準(zhǔn)主要是針對(duì)裂縫的長度、寬度進(jìn)行評(píng)價(jià),然而,隧道裂縫的形成原因較為復(fù)雜,影響因素較多,集合形態(tài)更是變化萬千,前人對(duì)裂縫形成原因、變化過程進(jìn)行了簡(jiǎn)單的分類和指標(biāo)化研究,但分類依據(jù)和目的尚不夠明確,設(shè)置的病害參數(shù)少而不全,無法準(zhǔn)確描述病害的基本幾何與力學(xué)特性,不能直接在隧道襯砌裂縫病害整治中直接應(yīng)用。2.裂縫的走向和裂縫滲漏水情況都是影響裂縫特征的關(guān)鍵性因素,本文結(jié)合這兩個(gè)因素的影響,提出了一套全新的隧道襯砌裂縫評(píng)定標(biāo)準(zhǔn)。3.通過對(duì)不同級(jí)別裂縫進(jìn)行模型實(shí)驗(yàn),為新評(píng)定標(biāo)準(zhǔn)中提到的四個(gè)級(jí)別的裂縫找到了一一對(duì)應(yīng)的整治方法,并詳細(xì)介紹了整治工序。4.推導(dǎo)出了整治方法的安全系數(shù)K的計(jì)算公式,用以印證整治效果。5.依托雅西高速土山崗1號(hào)隧道,結(jié)合現(xiàn)場(chǎng)工況與評(píng)定標(biāo)準(zhǔn),采用數(shù)值模擬提出了整治方案并加以驗(yàn)證。
[Abstract]:With the rapid development of economy in our country, the demand for traffic engineering is increasing, and the construction speed of railway, highway, municipal infrastructure and other infrastructure is increasing accordingly. In recent years, a large number of high-speed railways and highways have been built in our country. In order to ensure the smooth running of the lines and minimize the curve, when the lines pass through the mountainous and hilly areas, they are basically passed in the form of bridges and tunnels. As a result, bridges and tunnels account for an increasing proportion of the entire line, or even 90. During the operation of the tunnel, the vibration caused by the high speed operation of the vehicle in the tunnel is greatly and rapidly cooled, and the change of temperature results in thermal expansion and contraction. The concrete lining of the tunnel may be caused by the extra load imposed on the structure by the expansion of the special stratum. Cracks can greatly reduce the bearing capacity, waterproofing and durability of concrete structures. If lining cracks cause lining concrete to fall quickly, it will threaten the safe operation of tunnel to a great extent. In view of the present situation, it is more urgent and important to analyze and classify the tunnel lining crack diseases. On the basis of classifying tunnel lining cracks based on length and width, this paper synthetically considers the trend of cracks and the situation of water leakage, and makes a thorough study of tunnel lining crack diseases. The results are as follows: 1. The existing assessment criteria for tunnel cracks are mainly to evaluate the length and width of cracks. However, the reasons for the formation of tunnel cracks are more complex, the influence factors are many, and the form of assembly is even more varied. A simple classification and index study has been carried out in the process of change, but the classification basis and purpose are not clear enough, the disease parameters are few and incomplete, and the basic geometric and mechanical properties of the disease can not be accurately described. Can not be directly used in tunnel lining crack treatment. The strike of fractures and the leakage of cracks are the key factors that affect the characteristics of cracks. In this paper, a new set of assessment standard of tunnel lining cracks is put forward, which is based on the influence of these two factors. Through the model experiment on the crack of different grades, the one-to-one corresponding treatment method is found for the four classes of cracks mentioned in the new evaluation standard, and the treatment procedure .4. is introduced in detail. The calculation formula of safety factor K of regulation method is deduced to confirm the effect of regulation. Based on Yaxi High-speed Tushanggang No. 1 Tunnel, combined with site working condition and evaluation standard, the regulation scheme was put forward by numerical simulation and verified.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U457.2

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