Segment assembly point position selection device and method in shield method construction and application of segment assembly point position selection device and method

Abstract

The invention belongs to the technical field of tunnel construction, and discloses a segment assembly point position selection device and method in shield method construction and application. Analysis is carried out in the aspects of segment types, splicing modes, axis fitting, shield tail gaps and jack stroke differences, proper splicing point positions of segments are selected, so that the horizontal included angle alpha 2 between the segments and the designed axis and the vertical included angle theta 2 between the segments and the designed axis tend to zero, the included angle between the axis of the segments and the axis of the shield tail is reduced, and the friction probability between the segments and the shield tail is reduced. And shield tail leakage, water gushing and sand gushing are prevented. According to the method, the splicing point positions of the duct piece top sealing blocks can be visually displayed, duct piece splicing operators can quickly and accurately determine the splicing point positions, and therefore the point selection precision is improved, and the situations that due to inaccurate selection of the splicing point positions, a gap between the outer arc face of a duct piece and the inner arc face of a shield tail is small, and the axis deviation of a formed duct piece is large are avoided. According to the method, the phenomena of slab staggering and damage caused by wrong segment splicing point positions are avoided to the maximum extent.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a device, a selection method and an application for selecting a segment assembly point in shield tunneling construction. Background technique [0002] At present, the segment is the main assembly component of the shield construction, and is the innermost barrier of the tunnel, which bears the role of resisting soil pressure, groundwater pressure and some special loads. The 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. [0003] In the shield tunnel construction, the selection of segment assembly point is very important. If the point is not selected properly, the most direct performance is segment misalignment. In severe cases, segment damage and water leakage will occur,...

AI Technical Summary

Problems solved by technology

[0005] Through the above analysis, the existing problems and defects of the existing technology are: in the construction of the existing technology, the selection of the segment assembly site cannot provide guidance for the site, and cannot avoid the occurrence of segment misalignment and damage

Moreover, in the determination of the position of the selected point in the prior art, the accuracy rate is low

high cost

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