城轨大直径盾构机组装新技术研究

发布时间：2018-05-05 03:01

本文选题：城轨施工 + 盾构机　；参考：《华南理工大学》2014年硕士论文

【摘要】：经济的发展导致地下空间不断被开发。盾构施工技术已越来越广泛的被应用于各个城市各类地层的地铁、隧道、市政管道等工程领域。近30年来，盾构技术有了飞速的发展，盾构相关的一系列如壁后同步注浆、盾尾密封、盾构始发及接收的技术难题得以解决，使得盾构技术有了较快的发展。地铁建设的城市交通极为复杂、工程用地受到诸多干涉，不易确保。盾构要穿越各类地下结构物，如此使得盾构施工直径及长度越来越大。盾构隧道直径加大，面临了盾构机装配运输的难题。解决了装配运输难题，又面临了盾体分块多，现场组装的难度。由于现场施工环境差，对大盾构的组装也造成了一定的难度，需要耗费大量的时间，且仍会出现诸多质量问题。盾构隧道长度越大，对盾构机掘进性能的要求越高。盾构设备在施工时是无法退出的，施工的结构也无法重复。而且管片外径小于盾构外径，要拆除已拼装的管片也是相当危险。所以，盾构施工的前期工作非常的重要。做好了前期准备工作，才能降低日后盾构机在掘进过程中的高危风险，确保设备的安全运行，保证隧道结构安全。我们不断创新盾构施工技术，却忽略了决定盾构机性能的重要环节——盾构机组装施工技术。唯有以高标准控制盾构机组装质量，才能降低大直径盾构机施工的风险，从而确保盾构机性能，以便在长距离掘进过程中正常运行。盾构机组装包括盾构机运输、吊装、定位、螺栓连接、焊接、调试等关键工序。盾构机自重大，且分环、分块多，这为现场定位组装带了极大的难度。同时各片体在吊装、焊接过程中极易发生变形。在同类工程实际施工中，即便是耗费大量的时间、人力、物力，都没有达到满意的效果。因此，，为保证盾构机组装质量及使用性能，力争在最短的时间内创造最大的效益，本课题对盾构机组装技术进行探讨，研究出一套高效优质的大盾构机组装施工新技术。本课题通过工程实例，以Φ8780mm盾构机为研究对象，将盾构机组装的各个环节进行分解，从施工实操、质量安全、进度保证、成本控制四个方面对组装技术进行研究，理论结合实际，总结出一套先进、可操作性强、指导意义大的技术成果。
[Abstract]:The development of economy leads to the development of underground space. Shield construction technology has been widely used in subway, tunnel, municipal pipeline and other engineering fields. In the past 30 years, the shield technology has been developed rapidly, and a series of technical problems related to shield tunneling, such as simultaneous grouting behind the wall, shield tail seal, starting and receiving of shield, have been solved, which makes the shield technology develop rapidly. Subway construction of urban traffic is extremely complex, engineering land by many interference, not easy to ensure. Shield tunneling is going through all kinds of underground structures, which makes the diameter and length of shield construction larger and larger. The diameter of shield tunnel is enlarged, and it is faced with the difficult problem of assembly and transportation of shield machine. The problem of assembly and transportation is solved, and it is difficult to assemble the shield. Because of the poor construction environment on site, it is difficult to assemble large shield machine, and it needs a lot of time, and there will still be many quality problems. The larger the length of shield tunnel, the higher the requirement of tunneling performance of shield machine. Shield equipment in construction can not be withdrawn, the construction of the structure can not be repeated. And the outer diameter of the segment is smaller than the outer diameter of shield, it is dangerous to remove the assembled segment. Therefore, the shield construction of the early work is very important. In order to reduce the high risk in the tunneling process of shield machine in the future and ensure the safe operation of the equipment and the safety of tunnel structure, the preparatory work can be done well. We constantly innovate the shield construction technology, but neglect the important link that determines the performance of shield machine-the assembly construction technology of shield machine. Only by controlling the assembly quality of shield machine with high standard can the risk of construction of large diameter shield machine be reduced and the performance of shield machine be ensured so that it can run normally during long distance tunneling. Shield machine assembly includes shield machine transportation, hoisting, positioning, bolt connection, welding, debugging and other key processes. The shield machine is self-important, and divided into rings and blocks, which makes it extremely difficult to locate and assemble in situ. At the same time, the pieces are easily deformed during the welding process. In the practical construction of similar projects, even if it takes a lot of time, manpower and material resources, it does not achieve satisfactory results. Therefore, in order to ensure the assembly quality and performance of shield machine, and to create the greatest benefit in the shortest time, this paper discusses the assembly technology of shield machine, and studies a set of new construction technology of large shield machine assembly with high efficiency and high quality. This subject takes 桅 8780mm shield machine as the research object through the engineering example, decomposes each link of the shield machine assembly, carries on the research to the assembly technology from four aspects of construction practice, quality safety, progress guarantee, cost control, etc. Combining theory with practice, a set of advanced, operable and instructive technical achievements are summarized.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455.39

【参考文献】