自密实砂浆在堆石体中的填充性能研究  

Investigation of filling capability of self-compacting mortar in rockfill material

作　　者：王辉 刘嘉瀛 何世钦 周虎[2] WANG Hui;LIU Jiaying;HE Shiqin;ZHOU Hu(School of Civil Engineering,North China University of Technology,Beijing 100144,China;Department of Hydraulic Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]北方工业大学土木工程学院,北京100144 [2]清华大学水利水电工程系,北京100084

出　　处：《水力发电学报》2024年第12期34-42,共9页Journal of Hydroelectric Engineering

基　　金：2024年度北方工业大学研究生教育教学改革研究项目资助(YJS2024JG17)。

摘　　要：为了研究自密实砂浆在堆石体中的填充性能,制作L-B形箱模型并采用不同粒径的凸多边形块体随机摆放形成复杂且不规则的空隙通道,进行了自密实砂浆填充试验。将自密实砂浆视为宾汉姆流体,采用流体体积法对L-B形箱试验进行数值模拟,分析了堆石率与自密实砂浆填充性能之间的关系。研究表明:采用宾汉姆模型表征自密实砂浆的流变性是可行的;流体体积法可以合理地模拟自密实砂浆在具有不规则边界的堆石体中的流动过程和填充结果;在45%~60%范围内,随着堆石率的增加,自密实砂浆的填充性能先提高后降低,堆石率为50%时,自密实砂浆的填充性能最好。本文为研究自密实混凝土在堆石体中的填充性能提供了一种便捷的模拟方法,可应用于实际堆石混凝土施工仿真。To evaluate the filling performance of self-compacting mortar in rock piles,a L-B model is constructed and a filling experiment is conducted,using convex polygonal blocks of varying grain sizes randomly arranged to create a complex and irregular void channel.This L-B experiment is numerically simulated using the volume of fluid method and taking self-compacting mortar as Bingham fluid;the relationship is examined between the rock-fill rate and the filling performance of the mortar.We demonstrate the feasibility of characterizing the rheological properties of self-compacting mortars using the Bingham model,the volume of fluid method’s capability of simulating appropriately the mortar flow process,and its filling results for rock piles with irregular boundaries.The mortar filling performance increases and then decreases as the rock-fill rate increases in the range of 45%~60%,with the optimal rate of 50%.This study offers a convenient simulation method for examining the filling performance of self-compacting concrete in rock piles for practical construction.

关 键 词：水工结构 填充性能 流体体积法 自密实砂浆 堆石率 堆石混凝土 数值模拟 

分 类 号：TV431[水利工程—水工结构工程]