防灾减灾工程学报2026，Vol.46Issue(2)：419-429,11.DOI:10.13409/j.cnki.jdpme.20240607001
水位变化下盾构并行施工对大堤稳定性影响分析
Analysis of Influence of Shield Tunnel Parallel Construction on River Levee Stability under Fluctuating Water Levels
摘要
Abstract
This study aims to investigate the influence of stratum disturbance induced by utility tunnel shield tunnelling under varying water levels in riverside areas on the safety of existing river levees.The section of the Anqing Yangtze River levee along Yanjiang East Road in Anqing City,where a shield tunnel was constructed in parallel with the existing levee,was taken as the study background.First,field measurement data were analyzed to obtain the basic deformation patterns of the river levee.Then,a three-dimensional fluid-structure interaction numerical model of the shield tunnel parallel to the existing river levee was established to investigate the effects of the shield-levee distance S and wa-ter level H on the stability of both sides of the river levee,the deformation of different parts(levee crest and levee toe),and the horizontal displacement of the ground surface.The results showed that the settlement patterns at different parts of the river levee obtained from the numerical simulation were consistent with the field measurements.The numerical simulation showed that both S and H signifi-cantly affected the stability of river levee infiltration.The anti-sliding stability of the landside slope was more affected by S,while that of the waterside slope was more affected by H.At a spacing of 36 m,the hydraulic gradient J varied linearly with H,with a variation rate of 0.21/m.After shield tunnel-ling,J increased by 6.1%.The factor of safety Fs of the waterside slope increased,while that of the landside slope decreased,and the reduction in Fs became greater as the water level increased.At spac-ings of 24 m and 12 m,J increased by 12.8%and 17.9%after shield tunnelling,and the landside slope failed to meet the anti-sliding requirements when H exceeded 17 m.Maintaining S within 24-36 m ensured construction safety under different water levels.S significantly affected deformation at the le-vee crest,whereas H had a significant influence on deformation at the levee toe.The location of maxi-mum horizontal displacement of strata on the landside moved closer to the ground surface as the water level increased,while that on the waterside always occurred at the ground surface.The findings pro-vide a reference for the design and construction safety of similar projects.关键词
盾构隧道/堤防稳定/数值模拟/流固耦合/实测分析Key words
shield tunnel/river levee stability/numerical simulation/fluid-structure interaction/field measurement analysis分类
交通工程引用本文复制引用
豆小天,董军,刘维正,师嘉文,谭际鸣..水位变化下盾构并行施工对大堤稳定性影响分析[J].防灾减灾工程学报,2026,46(2):419-429,11.基金项目
中铁隧道局集团科技创新计划(隧二研合2020-07)资助 （隧二研合2020-07）
