Self-locking precast lining segment waterproof connector structure and working method thereof

Abstract

The invention relates to the field of metro shield construction, in particular to a self-locking precast lining segment waterproof connector structure and a working method thereof. The self-locking precast lining segment waterproof connector structure comprises a precast lining segment waterproof connector structure body and a self-locking bolt matched with the connector structure body. Protrudingheads are arranged at the positions, located on the left side and the rear side of a lining segment, of the precast lining segment waterproof connector structure body. Sunken openings matched with the protruding heads are formed in the positions, located on the front side and the right side of the lining segment, of the precast lining segment waterproof connector structure body. The protruding heads and the sunken openings are spliced in an inserted mode. Waterproof elastic sealing cushions with inverted-tooth structures at the ends are arranged in the sunken openings of the precast lining segment waterproof connector structure body. The upper side and the lower side of each protruding head are provided with inverted-hook structures. Inverted hooks on the upper side and the lower side ofeach inserted protruding head can be engaged with inverted teeth of each waterproof elastic sealing cushion, so that the structure has the self-locking characteristic. The self-locking bolt is provided with screws of a self-locking device, nut loosening can be effectively prevented, and the self-locking function is achieved. In the long-time using process, the protruding heads and the waterproof elastic sealing cushions in the sunken openings keep a tight extruding state, so that stability and durability of long-term waterproof are ensured.

Description

technical field [0001] The invention relates to the field of subway shield construction, in particular to a self-locking prefabricated lining segment waterproof interface structure and a working method thereof. Background technique [0002] At present, as an effective method of subway construction, shield tunneling method construction has been widely used in underground engineering. With its advantages such as small impact on the ground, high degree of mechanization, wide application range of soil layers, fast advancing speed, and construction safety, it is becoming more and more popular in subway construction. more dominant. However, due to the complexity of engineering geological conditions, it is inevitable that it will penetrate the area with a high water head. The traditional waterproofing of subway lining joints uses water-swellable water-stop strips or EPDM elastic water-stop strips. Under the conditions of water pressure and dislocation caused by splicing, water lea...

AI Technical Summary

Problems solved by technology

However, due to the complexity of engineering geological conditions, it is inevitable that it will penetrate the area with a high water head. The traditional waterproofing of subway lining joints uses water-swellable water-stop strips or EPDM elastic water-stop strips. Under the conditions of water pressure and dislocation caused by splicing, water leakage and water seepage of the joints are prone to occur, resulting in electrochemical corrosion of the connecting bolts, which seriously threatens the safety of the lining. A series of construction and maintenance measures need to be taken in the future to prevent the infiltration of water

All of the above situations will bring potential safety hazards, and the maintenance cost of the subway in the later stage of operation is high

[0003] At the same time, due to the daily running of subway trains, the lining segment structure bears traffic dynamic loads, and the connecting bolts between the segments are also subject to dynamic loads. Under long-term action, the bolts connecting the two segments will be generated Large stress relaxation and nut loosening, the connection between the two segments is not tight, which will lead to water seepage and even loosening and damage of the segments

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