Shield tunnel lining ring and blocking method

Abstract

The invention discloses a shield tunnel lining ring and a blocking method. The shield tunnel lining ring is composed by splicing seven standard segments connected in sequence, two adjoining segments connected with the two outer sides of the standard segments correspondingly and a capping segment between the two adjoining segments. The lining ring is provided with longitudinal bolts in the longitudinal direction. The blocking method of the shield tunnel lining ring includes the steps that according to the maximum segment lifting weight of a shield tunneling machine, the number of the standard segments in the lining ring is determined, the number of the longitudinal bolts is chosen according to the number of the standard segments, the distribution scheme of the longitudinal bolts in each segment of the lining ring and the circle center angle value and weight corresponding to each segment are calculated, and the lifting ability of the shield tunneling machine is verified. The shield tunnel lining ring is suitable for a shield tunnel with the diameter of 12 m, and the blocking method of the shield tunnel lining ring can be suitable for blocking of the tunnel segments of any diameter soas to optimize segment design.

Description

technical field [0001] The invention relates to the field of shield tunnels, in particular to a shield tunnel lining ring and a block method. Background technique [0002] With the continuous development and improvement of the level of mechanization and shield tunneling technology in our country, the construction of shield tunneling method has gradually become an important tool for urban underground railways and cross-river and sea tunnels due to its advantages of less disturbance to the ground, less impact on the environment, and fast mechanized construction. The main method of underground engineering construction. So far, there are very few segment types. Usually in the same area, the shield tunnel adopts a unified block method, regardless of the difference in strata, let alone the rationality of segment force. Blocks are barely optimized. The reason is very simple. Firstly, the unified segment block is beneficial to the design of the design institute; secondly, there ar...

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Problems solved by technology

However, so far, there are very few types of segments with different diameters, and even some tunnels have no segment types with different diameters, which brings many changes to the design, not to mention the optimization of segments

Tunnel segment design lacks a complete segment segmentation method

[0004] In addition, for shield tunnels with a diameter of 12m, there is currently no specific applicable block scheme in China. Due to the different specific requirements for the segment block and design of different diameters, it will be applicable to the lining rings of segment segments with other diameters. Directly used in shield tunnels with a diameter of 12m, there are problems in applicability and reliability

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