超近距穿越构筑物箱涵顶进施工沉降控制技术

发布时间：2018-01-17 02:05

本文关键词：超近距穿越构筑物箱涵顶进施工沉降控制技术　出处：《江苏建筑》2016年06期 　论文类型：期刊论文

【摘要】：吉林污水管线防护涵工程超近距穿越运营中的铁路及管廊基础。近距离穿越构筑物,沉降控制一直是施工难点。采用Midas有限元软件,按实际施工过程进行详细模拟,研究超近距穿越既有建筑设施,管幕箱涵施作时,地表及周边建筑设施的沉降规律及其控制技术。结果表明,箱涵轴线上方土体沉降与周边建筑沉降均可分为3个阶段。施工前期,沉降随顶进缓慢增长;施工中期,沉降随着顶进加速增长;施工后期,沉降趋于稳定。根据分析,提出了不同阶段沉降控制措施。后期监测数据表明,管幕箱涵顶进施工过程中,轴线上方土体、管廊基础以及铁路线沉降均在控制值之内,保证了管廊和铁路正常使用与运营安全。
[Abstract]:Jilin sewage pipeline protection culvert crossing operating in ultra short distance railway and pipe rack foundation. Short distance crossing structures, settlement control has been the difficulty of construction. Using Midas finite element software, detailed simulation according to the actual construction process of ultra short distance crossing the existing buildings, box culvert construction, settlement law the surface and the surrounding buildings and its control technology. The results show that the box culvert axis soil settlement and surrounding building settlement can be divided into 3 stages. The early stage of the construction, settlement with jacking slow growth; construction period, settlement with the jacking construction period, accelerated growth; stable settlement. According to the analysis, put forward the settlement control measures of different stages. During the monitoring data show that the box culvert jacking construction process, the axis of the top soil, pipe rack foundation and railway line settlement are in the control value, to ensure the pipeline and railway It is often used and operated safely.

【作者单位】：江苏华电工程设计院有限公司;无锡大宇钢结构工程设计咨询有限公司;
【分类号】：U449.82
【正文快照】： 管幕法指利用机械将多个钢管顶入将要施工的建筑周围,钢管锁口相连形成管幕,并将锁口处注入止水剂和砂浆,形成密封的止水层后,在管幕的保护下顶进箱涵。管幕箱涵工法,在施工时土体沉降量小,易于监测,对周围既有建筑影响轻微。因此这种穿越道路、铁路、机场等的非开挖技术在日

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