喷筑法作为非开挖修复技术中的一种重要方法，在工程实践中得到广泛应用。针对超高性能水泥基材料（ultra-high performance cementitious composites, UHPC）在喷筑法修复钢筋混凝土曲梁中的应用效果展开系统研究，重点探讨了曲梁角度、修复厚度及界面形式等关键参数对修复后结构承载性能的影响机制。试验结果表明：与120°曲梁相比，角度为90°的曲梁更适合作为试验研究对象。采用超高性能水泥基材料进行修复时，当修复厚度达到5 mm时，试件的强度即可达到原始试件的无损水平，且承载力提升幅度与修复厚度呈近似线性正相关关系。此外，自然黏结界面在持续荷载作用下呈现黏结性能退化现象，导致结构体系由叠合结构向复合结构转变，而采用植钉处理可显著提升界面黏结性能，其界面黏结强度可达自然黏结的1.7~1.8倍，有效延长了结构的叠合状态持续时间，从而大幅提升承载能力；相反，粘贴塑料膜则使界面黏结作用减弱，导致承载性能下降。

The spray-applied method, as a significant technique in trenchless rehabilitation, has been widely applied in engineering practice. A systematic study was conducted on the application effectiveness of ultra-high performance cementitious composites(UHPC) in spray-applied rehabilitation of reinforced concrete curved beams, with particular focus on the influence mechanisms of key parameters including curvature angle, rehabilitation thickness, and interface configuration on the load-bearing performance of rehabilitated structures. Experimental results reveal that curved beams with 90° curvature angle demonstrate greater suitability as test specimens compared to those with 120° curvature. When employing UHPC for rehabilitation, specimens achieve undamaged strength equivalent to original components at a rehabilitation thickness of 5 mm, while bearing capacity enhancement exhibits approximately linear positive correlation with rehabilitation thickness. Furthermore, natural bonding interfaces display adhesive performance degradation under sustained loads, leading to structural system transition from composite to combined structures. Notably, nail-planting treatment significantly improves interfacial bonding performance, achieving 1.7 ~ 1.8 times higher interfacial bond strength than natural bonding, effectively prolonging the composite state duration and substantially enhancing load-bearing capacity. Conversely, plastic film adhesion weakens interfacial bonding effects, resulting in reduced bearing performance.