土压平衡盾构高含水量渣土出渣技术研究

发布时间：2018-01-07 03:19

本文关键词：土压平衡盾构高含水量渣土出渣技术研究　出处：《中南大学》2014年硕士论文　论文类型：学位论文

【摘要】：摘要：在运用土压平衡盾构施工的隧道工程中,当遇到含水量较高的地层时,渣土排出、运输困难,泥浆飞散在隧道及市内交通干线,影响施工环境和市容环卫,产生高昂的清洁费用,而弃土也很难达到环保部门废弃物消纳标准。土压平衡盾构高含水量地层出渣问题,成为土压平衡盾构施工中亟待解决的问题。本文在总结盾构出渣运输技术与固液分离技术的基础上,创新性的提出了隧道内预分离泥水的施工方法。本文的主要工作如下： (1)从盾构施工法的发展现状、施工勘察、盾构类型及结构特点等方面,对盾构施工法进行了介绍。对土压平衡和泥水平衡两种盾构的优缺点及适用性进行了对比分析,为盾构机型的选择提供了依据。 (2)通过对盾构出渣运输技术与泥水平衡盾构渣土处理技术的研究,分析了现有土压盾构渣土运输方式的优劣及存在的问题,结合盾构工程实际,提出了隧道内预分离方法需要满足的要求。 (3)分别对筛分技术、压滤技术、螺旋挤压技术三种常见的连续分离方法进行了可行性研究,选择出可应用于盾构施工的合适设备,并提出其用于盾构高含水量渣土隧道内预分离和运输的改进设计。 (4)选取最具有可行性的螺旋挤压过滤机、振动筛两种设备进行了具体方案设计,实现了隧道内渣土泥浆预分离工艺,使盾构施工更为洁净环保。结合盾构渣土出渣量大、粘性大的特点,为振动筛设备设计了多功能刮离运输设备,提高了振动筛的处理能力和防堵塞能力。 (5)以某土压平衡盾构施工案例为例,设计了盾构整体出渣系统。
[Abstract]:Absrtact: in the tunnel construction with earth pressure balance shield, when the formation with high water content is encountered, the residual soil is discharged, the transportation is difficult, the mud is scattered in the tunnel and the main traffic line of the city. Affecting the construction environment and city appearance and sanitation, resulting in high cleaning costs, and the disposal of soil is difficult to meet the environmental protection department waste acceptance standard, earth pressure balance shield high water content formation slag problem. It is an urgent problem to be solved in the construction of earth pressure balance shield. On the basis of summing up the technology of slag transportation and solid-liquid separation technology of shield tunneling, this paper innovatively puts forward the construction method of pre-separating mud water in tunnel. The main work of this paper is as follows: 1) from the development status of shield construction method, construction survey, shield type and structural characteristics, and so on. The method of shield construction is introduced. The advantages, disadvantages and applicability of earth pressure balance and mud water balance are compared and analyzed, which provides the basis for the selection of shield machine type. 2) through the research on the technology of slag transportation in shield tunneling and mud water balance shield soil treatment technology, the advantages and disadvantages of the existing soil pressure shield residual soil transportation mode and the existing problems are analyzed, combined with the reality of shield engineering. The requirement of pre-separation method in tunnel is put forward. 3) the feasibility of three common continuous separation methods, sieving technology, pressure filtration technology and spiral extrusion technology, were studied, and the suitable equipment which could be used in shield construction was selected. An improved design for pre-separation and transportation of residual soil tunnel with high water content in shield tunneling is proposed. 4) selecting the most feasible spiral squeeze filter and vibrating screen two kinds of equipment to carry on the concrete scheme design, has realized the residual soil mud pre-separation process in the tunnel. The shield construction is more clean and environment-friendly. Combined with the characteristics of large amount of slag and large viscosity of residual soil in shield machine, a multi-function scraping and transportation equipment is designed for the vibrating screen equipment, which improves the handling ability and anti-clogging ability of the vibrating screen. Taking a case of earth pressure balance shield as an example, the whole slag extraction system of shield is designed.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455.43

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