Ultra-high performance concrete for thin-layer repair and reinforcement of cracked tunnel lining and preparation method of ultra-high performance concrete

The invention discloses ultra-high performance concrete for repairing and reinforcing a cracked tunnel lining through a thin layer. The ultra-high performance concrete is prepared from the following components in parts by weight: 624 to 780 parts of cement, 52 to 130 parts of silica fume, 208 to 286 parts of limestone powder, 954 to 1032 parts of river sand, 234 to 312 parts of steel fiber, 7.20 to 7.32 parts of a water reducing agent, 5.2 to 10.4 parts of pure acrylic acid-acrylic acid composite emulsion and 202 to 208 parts of water. Wherein the polymer composite emulsion is prepared by compounding and uniformly mixing pure acrylic emulsion and acrylic emulsion according to the mass ratio of 6: 4. The ultra-high performance concrete is high in breaking strength, so that the use thickness of the ultra-high performance concrete can be reduced under the condition of bearing the same breaking strength. 本发明公开了一种薄层修补加固裂损隧道衬砌的超高性能混凝土，包括以下按重量份计的组分：水泥624-780份，硅灰52-130份，石灰石粉208-286份，河砂954-1032份，钢纤维234-312份，减水剂7.20-7.