山岭区公路隧道结构变形机理与处治方法研究

发布时间：2018-02-20 03:39

本文关键词： 山岭地区隧道结构病害变形机理处治　出处：《重庆交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：我国是一个多山区的国家,尤其是重庆,四川,贵州,云南等西南地区,山岭的特点表现为数量多,山脉长而大。近年来,基础建设的迅速发展,尤其是高数公路和高速铁路,为交通基础建设的助力和支撑。高速公路的隧道通常作为整个项目工程的重要组成部分,通常对整个高速公路项目的建设期主控作用。另一方面,隧道的数量逐渐增多,长度和跨度不断增加,结构形式也呈现出多样化,隧道也取得了相对不错的发展和进步,整条线路所占的比例在逐渐增大,长度和跨度也在增加。隧道结构作为地下空间结构中的一种,由于施工质量不佳、工程地质条件恶劣、工程材料的选用不合理等影响,隧道结构病害在国内外仍是一个难题,这些结构的病害主要表现为:隧道衬砌结构开裂、隧道渗漏水、隧道坍方、衬砌结构背后空洞和不密实。根据相关的资料,将近30%的山区高速公路隧道存在不同程度的隧道结构病害,其中隧道衬砌结构病害,衬砌渗漏水和衬砌结构的开裂是最要的隧道结构变形破坏的方面。隧道结构一旦出现病害,将会对整条高速公路的营运安全产生影响,不尽会严重的威胁隧道内部的行车安全,缩短隧道的整个使用寿命周期和缩减高速公路的全寿命周期。隧道结构病害出现后若没得到及时较好的治理,衬砌结构的病害会进一步扩展,使二衬结构衬砌损伤,导致隧道内的最终塌方最终破坏。再者,隧道结构的局部病害有可能会直接直接影响整条隧道的安全使用,甚至致使整个隧道破坏,极大的造成经济成本和维修成本损失,社会影响和安全可靠的不利结果。因此,针对运营期的隧道,分析结构变形的机理和常见病害的成因,并在此基础上对隧道结构病害的检测技术和处治方法进行研究有十分重要的理论价值和实际意义。本文在研究国内外有关隧道结构病害产生的机理和处治方法技术研究成果的基础上,以重庆地区运营期山岭隧道的结构特征为切入点,根据具体的隧道工程实例来分析山岭地区的高速隧道结构的病害,研究隧道结构的变形机理,分别从外部荷载、环境等外部因素和设计、施工、材料等内部因素两个较大方面进行研究,对隧道结构病害的成因进行研究分析,总结出隧道结构病害可以或者可能的分类情况,以此研究透彻隧道结构的变形机理和变形影响因素,提出与之对应的隧道结构病害处治方法及施工技术措施。经过分析对比当前隧道结构病害的检测方法,归纳总结出适合我国西南地区运行期公路隧道的重要病害检测方法,在此基础上研究相应的治理方案。最后,以重庆某隧道为例,针对性提出符合该地区实际情况的各类病害的预防措施和处治措施,被证明隧道结构病害处治效果合理可靠。
[Abstract]:China is a mountainous country, especially in the southwest areas of Chongqing, Sichuan, Guizhou, Yunnan and so on. The mountains are characterized by a large number of mountains, long and large mountains. In recent years, the rapid development of basic construction, especially the high number of highways and high-speed railways, As an important part of the whole project project, the highway tunnel usually controls the whole expressway project construction period. On the other hand, the number of tunnels increases gradually. The length and span of the tunnel are increasing, the structure forms are diversified, the tunnel has made relatively good development and progress, and the proportion of the whole line is gradually increasing. The length and span are also increasing. As a kind of underground space structure, tunnel structure disease is still a difficult problem at home and abroad due to the influence of poor construction quality, poor engineering geological conditions and unreasonable selection of engineering materials. The main diseases of these structures are: cracking of tunnel lining, leakage of water, collapse of tunnel, cavity and uncompactness behind the lining. Nearly 30% of mountain highway tunnels have different degree of tunnel structural diseases, among which tunnel lining structural diseases, lining leakage and lining structure cracking are the most important aspects of tunnel structure deformation and destruction. It will have an impact on the operation safety of the whole highway, and it will not seriously threaten the traffic safety inside the tunnel. Shortening the whole life cycle of the tunnel and shortening the life cycle of the expressway. If the disease of the tunnel structure does not get better treatment in time, the disease of the lining structure will be further expanded and the lining of the second liner structure will be damaged. Furthermore, the local disease of tunnel structure may directly affect the safe use of the whole tunnel, and even cause the entire tunnel damage, resulting in great loss of economic cost and maintenance cost. Social impact and safe and reliable adverse results. Therefore, the mechanism of structural deformation and the causes of common diseases are analyzed for tunnels in operation period. On this basis, it is of great theoretical value and practical significance to study the detection technology and treatment methods of tunnel structural diseases. This paper studies the mechanism of tunnel structural diseases at home and abroad and the methods to deal with them. On the basis of the achievements of the art research, Based on the structural characteristics of the mountain tunnel in Chongqing area, this paper analyzes the disease of the high-speed tunnel structure in the mountain area according to the concrete tunnel engineering example, studies the deformation mechanism of the tunnel structure, and studies the deformation mechanism of the tunnel structure from the external load, respectively. External factors such as environment, design, construction, material and other internal factors are studied in this paper. The causes of tunnel structural diseases are studied and analyzed, and the classification of tunnel structural diseases can or may be concluded. Based on the thorough study of deformation mechanism and deformation influencing factors of tunnel structure, the corresponding treatment methods and construction technical measures of tunnel structural diseases are put forward, and the current detection methods of tunnel structural diseases are analyzed and compared. This paper sums up the important disease detection methods of highway tunnel suitable for the running period of southwest China, and studies the corresponding treatment scheme on this basis. Finally, taking a tunnel in Chongqing as an example, The preventive measures and treatment measures of various kinds of diseases in accordance with the actual situation in this area are put forward. It is proved that the treatment effect of tunnel structural diseases is reasonable and reliable.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U457.2

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