乐滩水库引水灌区果遂明渠塌陷成因与处理措施  

Causes and treatment measures for collapse in Guosui open channel of Letan Reservoir irrigation zone

作　　者：肖薇 XIAO Wei(Guangxi Water&Power Design Institute Co.,Ltd.,Nanning 530023,China)

机构地区：[1]广西水利电力勘测设计研究院有限责任公司,南宁530023

出　　处：《广西水利水电》2025年第2期67-69,共3页Guangxi Water Resources & Hydropower Engineering

摘　　要：桂中治旱乐滩水库引水灌区总干渠果遂明渠段先后发生2次底板与面板塌陷的险情。通过对坍陷段渠道补充外业勘察工作,分析其成因是浅埋岩溶及地下暗河问题引起的塌陷。本文通过对渠道上部结构进行浇筑整体式钢筋混凝土板梁结构以及对渠道下部结构采取灌注桩基础处理、“基础钢筋网+块石回填+棉花絮+碎石夯填+混凝土塞+混凝土衬砌封填”处理,有效解决了果遂明渠段坍塌问题,并为同类地区明渠塌陷处理提供参考。The bottom slab and revetment of Guosui open channel in Letan Reservoir irrigation zone have collapsed twice in succession.Supplementary field investigation was conducted at the collapsed channel sections,based on which it was analyzed the collapse resulted from the problems of shallow karst and underground river.For the upper position of the collapsed channel section,the adopted treatment measure is casting integral reinforced concrete slab-beam structure.For the lower position of the collapsed channel section,the adopted measures include foundation treatment with cast-in-place pile,base steel mesh,backfilling with block stones,cotton wadding,crushed stone tamp-ing and filling,concrete plugs and concrete lining.The collapse problem of Guosui open channel is effectively solved.

关 键 词：浅埋岩溶 地下暗河 明渠塌陷 整体式钢筋混凝土板梁结构 灌注桩 基础换填 

分 类 号：TV672.9[水利工程—水利水电工程]