The invention discloses a construction method for shield machine crossing a well, which eliminates the work of lifting and dismantling the traditional bracket in the early stage and later stage, saves construction period and reduces construction cost. The half-ring segments are assembled centrally between two whole-ring segments, and the number of two whole-ring segments and the middle half-ring segments is based on the specific size of the middle air shaft. It is determined that the continuous assembling of multiple semi-ring segments can meet the stress requirements, effectively save costs, speed up construction progress, facilitate installation and later disassembly. The two ends of the supporting components are respectively supported between the two sections of the whole ring segment, which is conducive to ensuring the continuity and stability of transmission force and reducing the risk of shield tunneling. The secondary start-up after the machine crosses the well provides strong guarantee, and facilitates the follow-up demolition work. It is widely applicable to various sizes of intermediate air wells, especially suitable for larger sizes of intermediate air wells, such as 30-50m length, to realize the rapid and safe crossing of the shield machine.
【技术实现步骤摘要】
一种盾构机过井的施工方法
本专利技术涉及地铁施工
,特别涉及一种盾构机过井的施工方法。
技术介绍
随着我国经济的逐渐发展,地铁建设已经成为一个城市现代化文明的标志,为城市的发展拓展了空间,加速了城市发展的步伐。地铁盾构是城市地铁施工中一种重要的施工技术,随着城市地铁逐步发展,地铁隧道越来越长,为确保通风条件,隧道中部往往需加设中间风井,而盾构机如何安全、快速、经济的通过中间风井也成了目前普遍存在的问题。现有技术中盾构机过井方案通常有:整体吊装后安装反力架再次始发、常规托架安装后拼装整环过站和常规托架安装后拼装整环+半环过站。但由于中间风井的尺寸通常与常规盾构始发井的尺寸不同,故周转循环使用的托架难以满足施工要求,且后期托架需吊装拆除,拆除过程中容易破坏,安全风险高、施工工期长;若采用整体吊装再组装始发的方法,则费用非常高,同时施工工期更长,吊装安全风险高。所以如何快速过井对这一问题的解决就显得极为重要。
技术实现思路
本专利技术的目的在于克服现有技术中盾构机过井时施工步骤复杂,无法兼具快速方便安装、受力稳定、安全性高和方便后期吊装拆除等上述不足,提供一种盾构机过 ...
【技术保护点】
1.一种盾构机过井的施工方法,其特征在于,包括以下步骤:a、在中间风井底板上施工混凝土导台,在所述混凝土导台上安装盾构机轨道;b、当所述盾构机的盾体进入中间风井后,沿掘进方向先连续拼装若干个整环管片,然后连续拼装若干个半环管片,再连续拼装若干个整环管片;c、所述盾构机到达二次始发端头,在若干个所述半环管片上方安装支撑部件,所述支撑部件的两端分别安装在若干个所述半环管片前后相邻的两个所述整环管片上,所述盾构机完成过井并能够进行二次始发。
【技术特征摘要】
1.一种盾构机过井的施工方法,其特征在于,包括以下步骤:a、在中间风井底板上施工混凝土导台,在所述混凝土导台上安装盾构机轨道;b、当所述盾构机的盾体进入中间风井后,沿掘进方向先连续拼装若干个整环管片,然后连续拼装若干个半环管片,再连续拼装若干个整环管片;c、所述盾构机到达二次始发端头,在若干个所述半环管片上方安装支撑部件,所述支撑部件的两端分别安装在若干个所述半环管片前后相邻的两个所述整环管片上,所述盾构机完成过井并能够进行二次始发。2.根据权利要求1所述的施工方法,其特征在于,在所述步骤a中,所述轨道有两排。3.根据权利要求1所述的施工方法,其特征在于,在...
【专利技术属性】
技术研发人员:陈强,陈卓,李军波,
申请(专利权)人:中铁二局集团有限公司,
类型:发明
国别省市:四川,51
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