Method for determining duct piece splicing point position of universal ring for subway shield construction

Abstract

The invention discloses a method for determining a duct piece splicing point position of a universal ring for subway shield construction. The method comprises the following steps: performing shield tunneling construction on a constructed tunnel from back to front along the central axis of the tunnel by adopting a shield tunneling machine; after a ring of the shield tunneling construction is completed, performing shield duct piece splicing construction; before any ring of shield duct piece splicing construction, determining the duct piece splicing point position of shield duct pieces of the current ring first, wherein the method for determining the duct piece splicing point position comprises the following processes: firstly, determining selectable splicing point positions; secondly, determining selection influence indexes and weight coefficients thereof: respectively determining the three selection influence indexes which influence the selection of the duct piece splicing position point and the weight coefficients thereof; thirdly, performing selectivity evaluation on the selectable splicing position points: respectively evaluating the selectivity of each selectable splicing position point according to a weight coefficient method, and determining the duct piece splicing point position of the current shield duct piece. The method disclosed by the invention is simple in step, reasonable in design, convenient to implement and good in using effect, and can determine the splicing point position of the duct pieces of the universal ring easily, conveniently and accurately.

Description

technical field

[0001] The invention belongs to the technical field of shield tunneling, and in particular relates to a method for determining the assembly point of a general ring segment in subway shield construction. Background technique

[0002] The shield segment is the permanent lining structure of the shield tunnel. The quality of the shield segment is directly related to the overall quality and safety of the tunnel, and affects the waterproof performance and durability of the tunnel. A ring of shield segments is called a segment ring. Universal segment means that there is only one type of segment ring, which can be used in both straight and curved segments. The universal ring refers to the universal segment lining ring, also known as the universal segment ring or the universal wedge segment ring. Segments are assembled by staggered seams. A ring segment generally consists of several A-type segments (ie, standard blocks), two B-type segments (ie, adjacent blocks) and...

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