Tunnel segment reduced scale test model with cracks and manufacturing method thereof

Abstract

The invention discloses a tunnel segment reduced scale test model with cracks and a manufacturing method thereof. The tunnel segment reduced scale test model with the cracks comprises a plurality of single segment models and inter-ring connecting parts for splicing every two adjacent single segment models. Wherein each single duct piece model comprises a pouring template, a duct piece main body and a reinforcement cage, the duct piece main body is arranged in an internal gap of the pouring template, and the reinforcement cage is arranged in the internal gap of the pouring template and is wrapped by the duct piece main body. The model can highly restore the internal details of the tunnel segment and reduce the manufacturing difficulty and cost.

Description

technical field [0001] The invention belongs to the technical field of subway tunnels in geotechnical engineering, and in particular relates to a tunnel segment scale test model with cracks and a manufacturing method thereof. Background technique [0002] The shield segment is the main assembly component of shield construction and the innermost barrier of the tunnel, which bears the role of resisting soil pressure, groundwater pressure and some special loads; the segment is generally installed from the lower standard block (Type A ) segments, the standard segments are installed alternately on the left and right sides, then the adjacent block (type B) segments are assembled, and the capping block (type K) segments are finally installed, the adjacent segments are connected by bolts, and the front and rear ring segments are mostly The peak staggered assembly is used, that is, the arc length of the segment is staggered by 1 / 2 to 1 / 3; the shield segment is used as the permanent l...

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Problems solved by technology

[0002] The shield segment is the main assembly component of shield construction and the innermost barrier of the tunnel, which bears the role of resisting soil pressure, groundwater pressure and some special loads; the segment is generally installed from the lower standard block (Type A ) segments, the standard segments are installed alternately on the left and right sides, then the adjacent block (type B) segments are assembled, and the capping block (type K) segments are finally installed, the adjacent segments are connected by bolts, and the front and rear ring segments are mostly The peak staggered assembly is used, that is, the arc length of the segment is staggered by 1 / 2 to 1 / 3; the shield segment is used as the permanent lining structure of the tunnel constructed by the shield method, and many diseases will occur during installation and normal operation afterward, affecting Segment bearing capacity and durability, which in turn affect the safety and normal use of the tunnel

[0003] At present, the model design for subway tunnel segments is mainly focused on full-scale and reduced-scale, and the production process is relatively mature, but these two methods have many shortcomings and limitations: 1. Although the full-scale segment model can better restore the segment itself state, but the assembly and operation are complex and cumbersome, requiring the cooperation of multiple people on the site with a large crane, and it is difficult to restore the actual working condition combination; 2. The full-scale segment model is expensive, expensive, and takes up a lot of space; 3. Although the reduced-scale segment model saves material costs, it is difficult to simulate the internal details of the segment, especially the connection between adjacent segments and segments between rings, which is mostly inconsistent with the actual situation

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