复杂巨厚覆盖层高闸坝基础变形控制研究  

Research on Deformation Control of Gate Dam Foundation With Complex and Thick Overburden

作　　者：魏匡民[1,2] 周恒 米占宽[1,2] 任强[1,2] 李国英 WEI Kuang-min;ZHOU Heng;MI Zhan-kuan;REN Qiang;LI Guo-ying(Nanjing Hydraulic Research Institute,Nanjing 210024,China;Key Laboratory of Reservior and Dam Safety of the Ministry of Water Resources,Nanjing 210029,China;PowerChina Northwest Engineering Corporation Limited,Xi’an 710065,China)

机构地区：[1]南京水利科学研究院,江苏南京210024 [2]水利部水库大坝安全重点实验室,江苏南京210029 [3]中国电建集团西北勘测设计研究院有限公司,陕西西安710065

出　　处：《水电能源科学》2022年第4期104-107,65,共5页Water Resources and Power

基　　金：国家重点研发计划重点专项(2018YFC1508503);国家自然科学基金项目(U1765203);中央级公益性科研院所基本科研业务费(Y320004,Y320005)。

摘　　要：变形控制是复杂巨厚覆盖层上高闸坝建设的重要难题。为此,以深厚覆盖层上多布水电站闸坝工程为例,系统介绍了深厚复杂覆盖层上闸坝基础变形控制措施,提出了可反映深厚覆盖层超固结特性的弹塑性模型及大规模桩群简化模拟方法,实现了深厚覆盖层闸坝工程的三维整体模拟,并通过三维数值模型结果与现场监测结果比较验证了多布水电站地基加固措施的有效性和必要性。Deformation control is an important problem in the construction of a high gate dam on a complex thick overburden.Taking the Duobu hydropower station as an example,this article introduced the settlement control method of gate dam foundation on the complex thick overburden.An elastoplastic model that can reflect the over-consolidation characteristics of deep overburden layers,and a simplified method for simulating large-scale pile groups were proposed.Therefore,the three dimensional overall simulation of the gate dam on deep overburden was realized.The validity of the numerical model was verified.The effectiveness and necessity of foundation reinforcement measures was verified by comparing the in-situ measured values with three-dimensional model.

关 键 词：巨厚覆盖层 闸坝 有限元 基础处理 超固结 

分 类 号：TU45[建筑科学—岩土工程] TV66[建筑科学—土工工程]