人民长江2025，Vol.56Issue(6)：162-168,190,8.DOI:10.16232/j.cnki.1001-4179.2025.06.021
不同埋深下盾构输水隧洞预应力双层衬砌模型试验
Model test on prestressed double-layer lining of shield water conveyance tunnel under different burial depths
摘要
Abstract
The prestressed double-layer lining structure of a shield water conveyance tunnel is a novel type of support structure with great potential for high-internal-pressure water conveyance projects,and its stress characteristics are a key focus in struc-tural design and research.To investigate the mechanical adaptability of this lining at different burial depths,a 1:5 scale model test was conducted based on the Pearl River Delta Water Resources Allocation Project.The results showed that;the prestressed lining is the primary load-bearing component of the prestressed double-layer lining,with higher internal force levels than those on the segmental lining.Under the combined action of internal and external loads,the overall deformation of the structure exhibits a"hor-izontal duck-egg"shape.As burial depth decreases,the risk of concrete cracking in the prestressed double-layer lining increa-ses,and the contact pressure between the lining layers decreases,the interactive load-sharing capability between the segmental lining and the prestressed lining weakens,resulting in more microstructural damage cracks.Therefore,in the structural design of pressure water conveyance tunnels with prestressed double-layer linings,greater attention should be paid to their mechanical be-havior under shallow burial conditions.This study can serve as a reference for the design of shield water conveyance tunnels with prestressed double-layer linings.关键词
输水隧洞/盾构隧洞/预应力双层衬砌/模型试验/力学特性/隧洞埋深/珠江三角洲水资源配置工程Key words
water conveyance tunnel/shield tunnel/prestressed double-layer lining/model test/mechanical property/buri-al depth/Pearl River Delta Water Resources Allocation Project分类
建筑与水利引用本文复制引用
马晓斌,王士民,刘畅,陈昱弛,陈宣..不同埋深下盾构输水隧洞预应力双层衬砌模型试验[J].人民长江,2025,56(6):162-168,190,8.基金项目
国家自然科学基金重大项目(52178398) （52178398）
