薄层单元厚度对堆石混凝土重力坝施工纵缝仿真的影响研究  

Study on the Influence of Thin Layer Element Thickness on Longitudinal Joint Simulation of Rock Filled Concrete Gravity Dam Construction

作　　者：陈兴梅 邹爽[1] 曾令福 梁亦辉 CHEN Xingmei;ZOU Shuang;ZENG Lingfu;LIANG Yihui(College of Civil Engineering,Guizhou University,Guiyang,Guizhou 550025,China)

机构地区：[1]贵州大学土木工程学院,贵州贵阳550025

出　　处：《水力发电》2022年第3期70-74,98,共6页Water Power

基　　金：贵州省科技计划项目(黔科合LH字[2016]7466);大创计划项目(贵大省创字[2020]084)。

摘　　要：堆石混凝土重力坝中,常态混凝土防渗层的施工会使坝体产生一条施工纵缝,其对堆石混凝土重力坝的影响尚不明确,为此,提出采用薄层单元模型对堆石混凝土重力坝的防渗层施工纵缝进行二维仿真。为提高仿真精度,薄层单元厚度的选择是关键。以某堆石混凝土重力坝为例,探讨薄层单元厚度对施工纵缝仿真的具体影响。研究表明:薄层单元厚度对堆石混凝土重力坝施工纵缝的缝面应力以及坝基面的应力影响显著;坝踵和纵缝底端应力整体上与薄层单元厚度线性相关;薄层单元厚度控制在5~15 cm比较适中。In rock filled concrete(RFC) gravity dam,the construction of normal concrete impervious layer will cause a construction longitudinal joint in the dam body.The influence of the longitudinal joints on the RFC gravity dam is not clear and needs further study.In view to this,it is proposed to adopt thin layer element model to carry out two-dimensional simulation of longitudinal joints in the construction of impervious layer of RFC gravity dam.In order to improve the simulation accuracy,the choice of thin layer element thickness is the key.Taking a RFC gravity dam as the example,the specific influence of the thickness of thin layer element on the longitudinal joint simulation is discussed.It is found that the thickness of thin layer element has a significant effect on the joint surface stress of the construction longitudinal joint of RFC gravity dam and the dam foundation surface stress,the stresses at dam heel and longitudinal joint bottom are linearly correlated with the thickness of thin layer element,and the thickness of thin layer element is moderate to be controlled in the range of 5-15 cm.

关 键 词：防渗层施工纵缝 二维仿真 薄层单元 厚度 堆石混凝土重力坝 

分 类 号：TV640.39[水利工程—水利水电工程]