水利学报2026，Vol.57Issue(6)：905-917,13.DOI:10.3724/j.slxb.20250409
装配式配筋UHPC内衬管环力学性能试验研究
Experimental study on mechanical properties of prefabricated reinforced UHPC inner liner rings
摘要
Abstract
To address the conflict between lining thickness and rehabilitation effect in trenchless repair of structural defects in large-diameter pipelines,this study proposes a prefabricated inner liner ring made of reinforced ultra-high-performance concrete(UHPC).Innovatively,iron-based shape memory alloy(Fe-SMA)rebars were incorpo-rated to introduce self-prestressing in the thin-walled curved segments,thereby enhancing their structural perfor-mance without increasing wall thickness.Three-edge bearing tests were conducted to comparatively evaluate the effects of concrete type,reinforcement scheme,reinforcement ratio,and prestress activation state on the structural performance.The bending moment distribution and crack propagation characteristics were systematically analyzed.The results indicate that the maximum bending moments occur at the crown and invert of the ring,followed by the springlines,while the shoulder and haunch exhibit relatively lower bending moments.The failure mode is governed by plastic hinge formation,and no premature damage initiates at the assembly joints.Compared with specimens with-out prestress activation,the cracking load and the load corresponding to a crack width of 0.2 mm increase by 44.4％and 35.6％,respectively,after activating the Fe-SMA rebar.The self-prestressing effect significantly enhances crack resistance of the thin-walled UHPC liner ring.The findings provide a reference for the design optimization and engineering application of thin-walled UHPC lining structures.关键词
地下管道/非开挖修复/装配式UHPC管片/铁基形状记忆合金/自预应力Key words
underground pipeline/trenchless rehabilitation/prefabricated UHPC segment/iron-based shape memory alloy/self-prestressing分类
建筑与水利引用本文复制引用
姬江豪,王谆,董志强,朱虹,张云飞..装配式配筋UHPC内衬管环力学性能试验研究[J].水利学报,2026,57(6):905-917,13.基金项目
国家重点研发计划课题(2024YFD1600404) （2024YFD1600404）
江苏省优秀青年基金项目(BK20230088) （BK20230088）
国家自然科学基金面上项目(52378139) （52378139）
东南大学至善青年学者项目(2242025RCB0007) （2242025RCB0007）
中央高校基本科研业务费项目(2242022k30031) （2242022k30031）
