Horizontal loading test system and method for bearing capacity performance of U-shaped shield duct piece structure

Abstract

The invention discloses a horizontal loading test system for the bearing capacity performance of a U-shaped shield duct piece structure. The system comprises a duct piece support, a loading longitudinal beam, a reinforced concrete reaction wall, profiled steel reaction columns, a jack, an anchorage device, an active tensed steel strand and a passive tensed steel strand, wherein the duct piece support is provided with duct pieces which are spliced into a ring; a loading ring beam is arranged on the outer side of a duct piece ring; the loading ring beam is arranged on the outer side in a surrounding manner; the loading longitudinal beam is arranged on the outer side of the loading ring beam; the jack is arranged on the outer side of the loading longitudinal beam; the jack is connected with the reinforced concrete reaction wall through the active tensed steel strand anchored through the anchorage device; the reinforced concrete reaction wall is arranged inside the duct piece ring and is fixed through the profiled steel reaction columns; the profiled steel reaction columns are arranged on the inner and outer sides of the reinforced concrete reaction wall, and are connected with the jack through the active tensed steel strand anchored through the anchorage device; the profiled steel reaction columns are arranged on the inner and outer sides of the reinforced concrete reaction wall.

Description

technical field [0001] The invention relates to the field of performance test of shield segment bearing capacity, in particular to a horizontal loading test system and method for the bearing capacity performance of a horseshoe-shaped shield segment structure. 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 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. [0003] The test of the prototype segmental lining structure of the shield tunnel can more realistically test the detailed characteristics of the segmental lining structure and the mechanical properties of the structural bearing capacity, inst...

AI Technical Summary

Problems solved by technology

[0004] In the past, the shield segment prototype loading test devices were either vertical or horizontal, and many of them were circular segments without reaction walls. They were pulled against each other according to symmetry. There was almost no unbalanced force, and most of the reaction

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