黑龙滩灌区毛家河渡槽安全检测与结构计算分析  

Safety detection and structural calculation and analysis of Maojiahe aqueduct in Heilongtan irrigation area

作　　者：郭俊利[1] 赵川 王筱红[1] 姜国新[1] 罗茂盛 GUO Junli;ZHAO Chuan;WANG Xiaohong;JIANG Guoxin;LUO Maosheng(Sichuan Academy of Water Conservancy,Chengdu 610072,Sichuan,China)

机构地区：[1]四川省水利科学研究院,四川成都610072

出　　处：《工程建设》2024年第1期14-17,23,共5页Engineering Construction

基　　金：四川省科技成果转移转化引导计划资助项目(24YSZH0010);四川省科技厅科技计划资助项目(2020JDZH0002);四川省省级科研院所基本科研业务费项目(SKY-2023-492060499)。

摘　　要：为了评估毛家河渡槽当前的安全状态,本文采用有限元法分析渡槽边墙的变形破坏机理,对渡槽的基础和槽身砌体结构进行现场检测和安全评价。结果表明:(1)渡槽砌体结构表面存在风化、剥蚀,砌体砂浆老化,局部失去黏结力,槽身渗漏严重,砂浆抗压强度和条石饱和抗压强度均不符合规范要求;(2)受槽内水荷载作用影响,渡槽过流断面内侧底部出现局部受拉现象,拉应力范围为0~20 kPa,在渡槽底部出现应力集中现象;(3)两侧边墙底部均出现剪切破坏,左边墙破坏区已贯通,右侧尚未贯通;(4)计算结果与渡槽实际破坏情况基本一致,渡槽结构不稳定。本文成果可为后期渡槽的安全加固设计提供一定的参考。In order to evaluate the current safety status of the Maojiahe aqueduct,the finite element method is used to analyze the deformation and failure mechanism of the side wall of the aqueduct,and on-site inspection and safety evaluation of the foundation and masonry structure of the aqueduct are carried out.The results show that:(1)There is weathering and denudation on the surface of the masonry structure of the aqueduct,the masonry mortar is aging,the local cohesion is lost,the leakage of the aqueduct is serious,and the compressive strength of the mortar and the saturated compressive strength of the stone do not meet the requirements of the specification;(2)Affected by the water load in the aqueduct,the local tension occurs at the bottom of the inner side of the aqueduct overflow section,and the tensile stress range is 0~20 kPa,and the stress concentration phenomenon occurs at the bottom of the aqueduct;(3)The bottom of the side walls on both sides has shear failure,the left wall failure area has been penetrated,and the right side has not been penetrated yet;(4)The calculation results are basically consistent with the actual failure of the aqueduct,and the structure of the aqueduct is unstable.The results can provide a certain reference for safety reinforcement design of the later aqueduct.

关 键 词：渡槽 安全评价 剪切破坏 应力集中 有限元分析 

分 类 号：TV698.1[水利工程—水利水电工程]