Waterproofing reinforcement structure of underground structure expansion joint and constructing method thereof

摘要

In the present invention, a'∨'-shaped groove is formed in the longitudinal direction on the upper part of the drain bar inserted in the expansion joint that connects the structure of the underground structure and the waterproof sheet attached thereto is also formed in a groove shape, together with the drain bar. The waterproof reinforcement structure of the expansion joint of an underground structure and its structure, which can prevent damage to the waterproof layer by allowing the waterproof sheet to absorb the expansion and contraction amount even if contraction or expansion occurs in the structure depending on the outside temperature by making it move while moving. It is to provide a construction method.