Waterproofing method for stress monitoring cable joints for reinforced concrete segments

Abstract

The invention belongs to the technology of stress testing for reinforced concrete segment structures in shield tunnel engineering, and discloses a waterproofing method for stress monitoring cable joints for reinforced concrete segments. The waterproofing method includes using bars containing hot melt adhesive (9) to realize a sealing and waterproofing effect for the joints of monitoring element cables (8); storing the cables (8) preserved by monitoring elements in grouting holes (4); and sealing the grouting holes (4) by plastic plates (5) and silicon sealant. By the aid of the double-effect waterproofing method for the cables (8), waterproofing of the stress monitoring element for the reinforced concrete segments is successfully realized, and normal usage of all the stress monitoring elements is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of stress testing of reinforced concrete segment structures in shield tunneling engineering, and mainly relates to a method for waterproofing cable joints used for monitoring the stress of reinforced concrete segments. Background technique [0002] Reinforced concrete segment is a prefabricated component made of arc-shaped plate ribs made of reinforced concrete, steel, cast iron or other materials in the factory. During the embedding process of the reinforced concrete segment monitoring element, the monitoring element is usually The cable is cut off, resulting in the exposure of the twisted pair in the cable. During the steam curing of the segment concrete and the curing of the pool, the infiltration of water vapor and the direct immersion of the cable joint by the water body will affect the normal performance of the embedded monitoring components. The current common method for waterproofing the cable joints...

AI Technical Summary

Problems solved by technology

[0002] Reinforced concrete segment is a prefabricated component made of arc-shaped plate ribs made of reinforced concrete, steel, cast iron or other materials in the factory. During the embedding process of the reinforced concrete segment monitoring element, the monitoring element is usually The cable is truncated, resulting in the exposure of the twisted pair in the cable. During the steam curing of the segmental concrete and the curing of the pool, the infiltration of water vapor and the direct immersion of the cable joint by the water body will affect the normal performance of the embedded monitoring components.

The current common method for waterproofing the cable joints of monitoring components is to wrap the cable joints with waterproof tape layer by layer to prevent water from entering the interior of the cables from the joints. The force monitoring components cannot be used normally, making the collected monitoring data abnormal or even missing, thus affecting the test effect of the force state of the segment

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