TUNNEL EXFOLIATION PREVENTION METHOD AND SPRAY AGENT FOR TUNNEL EXFOLIATION PREVENTION METHOD

To provide a tunnel exfoliation prevention method using a one pack-type spray agent, capable of, even while reducing the amount of the spray agent applied, achieving sufficient strength to prevent tunnel inner surface exfoliation, e.g., 1100 N or more in a maximum load in a concrete push-extraction...

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Main Authors TOMII TAKAYOSHI, KIYA OKUHITO, HATTORI TAKASHI, DEGUCHI DAISUKE, YASUNAGA HIDENORI, AOKI SHUNJI, KUNIKAWA MASAKATSU
Format Patent
LanguageEnglish
Japanese
Published 14.03.2024
Subjects
ADHESIVES
CHEMISTRY
DYES
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MINING
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
POLISHES
SHAFTS
TUNNELS
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Summary:To provide a tunnel exfoliation prevention method using a one pack-type spray agent, capable of, even while reducing the amount of the spray agent applied, achieving sufficient strength to prevent tunnel inner surface exfoliation, e.g., 1100 N or more in a maximum load in a concrete push-extraction test.SOLUTION: A tunnel exfoliation prevention method is to spray on an inner wall of a tunnel a one pack-type spray agent containing an isocyanate prepolymer, an isocyanurate compound and a latent curing agent. The spray agent contains a specific kind of the isocyanate prepolymer and a specific kind of the isocyanurate compound.SELECTED DRAWING: None 【課題】一液型スプレー剤を使用するトンネル剥落防止工法であって、スプレー剤の塗布量を少なく抑えながらも、トンネル内面の剥落を防止するために十分な強度、例えば、コンクリート押し抜き試験での最大荷重１１００Ｎ以上を実現することができるトンネル剥落防止工法を提供することを目的とする。【解決手段】イソシアネートプレポリマーとイソシアヌレート化合物と潜在性硬化剤とを含む１液型のスプレー剤であり、前記スプレー剤中のイソシアネートプレポリマーの種類及びイソシアヌレート化合物の種類を所定のものとしたスプレー剤をトンネルの内壁に吹き付ける、トンネル剥落防止工法。【選択図】なし
Bibliography:Application Number: JP20220140318