摘要
【目的】由于跨湿陷性黄土区的输水渡槽因服役期内的地基变形和建筑物老化,造成渡槽的服役安全性和结构稳定性难以定量评估,为对湿陷性地基渡槽的稳定状态进行评估,以宁夏固海扩灌灌区的清水河渡槽为研究对象,构建了基于湿陷性黄土地基稳定状态与渡槽建筑物稳定状态的多级评估体系耦合的湿陷性黄土地基渡槽稳定状态综合评估体系,【方法】使用云模型对湿陷性黄土地基渡槽稳定状态进行综合评估,使用AHP-熵权法对云模型进行改进,研究中使用拉格朗日乘子法将AHP法与熵权法进行耦合后计算指标权重,以提高模型权重的合理性使其更加客观精确。【结果】研究结果显示:现役清水河渡槽的湿陷性黄土地基稳定状态、渡槽建筑物稳定状态及湿陷性黄土地基渡槽整体稳定状态的云数字特征参数分别为W_(1)=(4.608,0.766,0.228)、W_(2)=(6.094,0.674,0.214)和W=(5.307,0.720,0.221)。【结论】结果表明:现役清水河渡槽的湿陷性黄土地基稳定状态、渡槽建筑物稳定状态及湿陷性黄土地基渡槽整体稳定状态分别处于V_(3)(中等)稳定状态、V4(较为)稳定状态以及V_(3)(中等)稳定状态。该评估模型可为同类湿陷性黄土区域的水工建筑物的稳定状态评估提供参考。
[Objective]The service safety and structural stability of water conveyance aqueducts across wet submerged loess areas are difficult to assess quantitatively due to foundation deformation and building deterioration during the service life of the aqueducts.In order to assess the stable state of wetted foundation aqueduct,this study takes the Qingshui River ferry in Ningxia Guhai irrigation area as the research object,and constructs a comprehensive assessment system for the stable state of wetted loess foundation ferries based on the coupling of the stable state of wetted loess foundation and the stable state of the ferry building with a multilevel assessment system.[Methods]The cloud model is used to make a comprehensive assessment of the stability state of the wetted loess foundation trench,and the cloud model is improved by using the AHP-entropy weight method.In the study,the Lagrange multiplier method is used to couple the AHP method with the entropy weight method to calculate the index weights,so as to improve the reasonableness of the model′s weights and make them more objective and precise.[Results]The research result show that the cloud numerical characteristic parameters of the stability state of the collapsible loess foundation,the stability state of the aqueduct building,and the overall stability state of the collapsible loess foundation aqueduct in active Qingshui river aque-ductare are W_(1)=(4.608,0.766,0.228),W_(2)=(6.094,0.674,0.214),and W=(5.307,0.720,0.221),respectively,[Conclusion]The result show that the stabilization state of the wetted loess foundation,the stabilization state of the aqueduct building and the overall stabilization state of the aqueduct with wetted loess foundation of the active Qingshui River aqueduct are in the V_(3)(medium)stable state,V4(more)stable state and V_(3)(medium)stable state,respectively.The assessment model can provide a reference for the assessment of the stability of similar hydraulic structures in the region of wet subsiding loess.
作者
张海晨
曹骏
李嘉明
王鑫
任子豪
訾亚辉
ZHANG Haichen;CAO Jun;LI Jiaming;WANG Xin;REN Zihao;ZI Yahui(Water Resources Engineering Construction Centre of Ningxia,Yinchuan750001,Ningxia,China;School of Water Conservancy,North China University of Water Resources and Electric Power,Zhengzhou450046,Henan,China)
出处
《水利水电技术（中英文）》
北大核心
2024年第1期144-156,共13页
Water Resources and Hydropower Engineering
基金
宁夏水利科技攻关项目(GKGX-KY-01)
河南省科技攻关项目(212102310273)
国家自然科学基金资助项目(51579102)。
关键词
湿陷性黄土地基
渡槽
云模型
稳定状态
AHP-熵权
变形
collapsible loess foundation
aqueduct
cloud model
stability state
AHP-entropy
deformation
