Interlocking and shear-resistant segment connection structure for assembly of initial receiving segment segment ring

Abstract

The invention discloses an interlocking and shear-resistant duct piece connecting structure for initial receiving section duct piece ring assembly, which comprises a pre-buried inner sleeve and a connecting inner core, the pre-buried inner sleeve is pre-buried at the to-be-spliced end part of a duct piece and is provided with a connecting groove, the connecting groove comprises a first groove body and a second groove body, the second groove body is divided into a plurality of stages of clamping grooves from outside to inside along the extension direction of the first groove body, and the connecting inner core is connected with the first groove body and the second groove body. Each stage of clamping groove is composed of a plurality of second groove bodies distributed around the center of the first groove body. The connecting inner core comprises a first core body and a second core body, and the first core body and the second core body are plugged into the connecting grooves respectively; and the peripheries of the first core body and the second core body are respectively provided with a protruding part which is interlocked with each stage of clamping groove of the corresponding connecting groove. The problems of slab staggering, opening and uneven stress of inner and outer cambered surfaces among the segments are solved, the inner and outer wall surfaces of the formed segment ring are very flat and attractive, meanwhile, the segment ring is not easy to rust, the bearing capacity and durability are ensured, in addition, the segment ring is convenient to assemble, and large smoke dust, harmful gas and noise pollution cannot be generated.

Description

technical field [0001] The invention belongs to the technical field of shield tunnel construction, and in particular relates to an interlocking and shear-resistant segment connection structure for segment ring assembly in a starting and receiving section. Background technique [0002] In recent years, with the rapid development of social economy and urbanization, shield tunneling technology has become an indispensable key technology in the construction of major transportation and other infrastructure in my country. In important risk stages of shield tunneling construction such as shield launching, receiving or shallow covering soil sections, due to the small surrounding water and soil pressure, and even no water and soil pressure at the negative ring, it is difficult to assemble the segment ring and it is not easy to fix it. The self-stabilization ability is poor, and it is easy to open and stagger. [0003] In the previous shield tunnel construction process, the traditiona...

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Problems solved by technology

[0004] 1. The uneven force on the inner and outer arc surfaces of the segment is likely to cause local damage. The welded steel plate is usually set on the inner arc surface of the segment, which can easily lead to the increase and damage of the local internal force of the segment structure;

[0005] 2. The installation process is complicated, which will affect the speed of segment assembly, and will generate relatively large smoke, harmful gases and noise pollution;

[0006] 3. The steel plate welded on the inner curved surface of the segment is easy to conflict with other internal structures of the segment, and affects the flatness and aesthetics of the segment;

[0007] 4. Welded steel plates are prone to rust in humid environments or when water leaks in tunnels, which affects the bearing capacity and durability of the reinforced structure;

[0008] 5. The structure of the joint between the rings mostly adopts the concave-convex tenon structure, but the concave-convex tenon structure cannot provide longitudinal tension and cannot control the opening between the segment rings, and the pure shear can be converted into curved shear after the tenon and the groove are in contact. Combination, although the shear stiffness between the rings is increased, but at the same time it will cause the segments between the rings to open

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