沙湾水电站闸坝错缝侧倾现象分析及控制措施研究  

Study on the Phenomenon and Control Measures of the Staggered Sluice of Shawan Hydropower Station

作　　者：刘后露 王东[1] 易恒如 周泽泽 郭广鑫[1] 金浩博 LIU Houlu;WANG Dong;YI Hengru;ZHOU Zeze;GUO Guangxin;JIN Haobo(School of Water Resources and Hydropower,Sichuan University,Chengdu 610065,Sichuan,China;Changjiang Waterway Institute of Planning and Design,Wuhan 430040,Hubei,China)

机构地区：[1]四川大学水利水电学院,四川成都610065 [2]长江航道规划设计研究院,湖北武汉430040

出　　处：《水力发电》2021年第6期65-69,共5页Water Power

摘　　要：长尾水渠水电开发布置方案中,深厂房侧边建筑物多建于高填方基础上,这样就会造成软、硬地基交界处建筑物发生不均匀沉降,从而危害水工建筑物安全。以沙湾水电站闸坝为例,该闸基为高填方砂卵石,采用非线性D-P本构模型开展三维数值模拟,对比回填基础固结灌浆材料和以胶凝砂砾石材料回填2种情况下的闸室沉降,可以得到如下结论:闸体自重对回填基础的压实是造成闸基过量铅直向变形的核心因素,基础填方深度不同以及回填体变形模量和密实度不足是造成工程不均匀沉降的根本原因,回填胶凝砂砾石材料能更有效控制此类地基的不均匀沉降。In the hydropower development layout plan with long tailrace channel,the side buildings of the deep powerhouse are mostly built on high-filled foundation,which will cause uneven settlement of the buildings at the junction of the soft and hard foundations,thereby endangering the safety of hydraulic construction.Taking the sluice dam of the Shawan Hydropower Station with high-filled sand and gravel as an example,the nonlinear D-P constitutive model is used to carry out three-dimensional numerical simulation,and the settlements of sluice chamber in the case of backfilling foundation consolidation grouting material and backfilling with cemented sand and gravel material are compared.It is concluded that the compaction of the backfill foundation by the weight of sluice body is the core factor that causes excessive vertical deformation of sluice foundation,and the different depth of the foundation filling and the insufficient deformation modulus and compactness of the backfill body are the fundamental factor of uneven settlement.The backfill of cemented sand and gravel materials can more effectively control the uneven settlement of such foundations.

关 键 词：长尾水渠 高填方地基 不均匀沉降 数值模拟 胶凝砂砾石材料 闸坝 沙湾水电站 

分 类 号：TV66[水利工程—水利水电工程] TV698.232