期刊论文

Instability analysis and countermeasure research of soil slope in Centianhe canal

中文

长沙理工大学学报(自然科学版)

1672-9331

2022

19

1

53-63

10.19951/j.cnki.1672-9331.2022.01.007

2019JJ50336:湖南省自然科学基金资助项目 2017-230-4:湖南省水利科技项目 XSKJ2018179-04:湖南省水利科技项目 19B018:湖南省教育厅科学研究项目

本校为第一机构

【目的】探究因不合理开挖导致的渠道土质边坡的失稳问题。【方法】以涔天河干渠切方土质边坡为例,用FLAC3D模拟其施工过程,复核开挖设计方案,分析边坡开挖诱发牵引式滑坡的破坏机理。针对失稳土质边坡,提出边坡锚固支护、渠道衬砌(方案一)和边坡锚固、明渠变更暗涵(方案二)两种加固处置方案,并分析了处置措施的有效性。【结果】对边坡使用方案二支护加固后,其稳定性明显优于方案一,最不利工况的安全系数可达1.18以上,边坡的总体安全性可以得到保障,而且能最大限度地减小边坡开挖对地表变形的影响,研究成果可指导边坡后期施工的顺利进行。基于TOUGH2模拟脉动灌浆,通过精细化模拟灌浆过程,确定灌...

[Purposes]The paper aims to explore the problem of soil slope instability of canal caused by unreasonable excavation.[Methods]Taking the incised soil slope of Centianhe trunk canal as an example,its construction process was restored by FLAC3D numerical simulation,the excavation design scheme was reviewed,and the failure mechanism of traction landslide induced by slope excavation was analyzed.Aiming at the instable soil slope,two reinforcement treatment schemes were put forward,namely the scheme 1(slope anchoring support,canal lining)and the scheme 2(slope anchoring,hidden culvert replacing ope...