胶凝砂砾石质量控制方法  

Quality control methods for cementitious gravel

作　　者：王婧红 王利英[1] 董卫[1] 张保胜 WANG Jinghong;WANG Liying;DONG Wei;ZHANG Baosheng(College of Water Resources and Hydropower,Hebei University of Engineering,Handan 056038,China;Shanxi Water Conservancy Construction Engineering Bureau Co.,Ltd.,Taiyuan 030006,China)

机构地区：[1]河北工程大学水利水电学院,河北邯郸056038 [2]山西省水利建筑工程局有限公司,太原030006

出　　处：《南水北调与水利科技（中英文）》2021年第2期393-399,共7页South-to-North Water Transfers and Water Science & Technology

基　　金：国家自然科学基金(11972144);河北省自然科学基金(E2018402092,F2017402142)。

摘　　要：为了探索便捷的胶凝砂砾石质量控制方法,通过大同守口堡水库大坝现场碾压试验,结合大坝填筑初期的补充试验,对胶凝砂砾石150mm立方体小试件(剔除大于40mm颗粒)和450mm立方体大试件(全级配颗粒)抗压强度进行相关分析,探求出小试件和大试件抗压强度值之间的函数关系。同时对核子密度仪检测的密度值与灌水法在同一点检测的密度值进行相关分析,探求出两种方法同一测点密度值的函数关系。研究结果表明:在胶凝砂砾石施工中,可以利用小试件代替大试件进行抗压强度检测,利用核子密度仪代替灌水法进行密度检测,以解决传统质量控制方法的不足。The cemented sand-gravel dam is a new type of dam between the granular dam and the rigid dam.The two main aspects of controlling the quality of the cemented sand-gravel are compressive strength and density.In terms of strength,the maximum particle size of the cemented sand gravel material aggregate is 150 mm.According to the existing concrete test regulations,the full-graded test piece of this material should be a cube with a side length of 450 mm,but the production of the test piece is laborious and time-consuming,the cost is high;in terms of density control,the traditional irrigation method test takes a long time and affects the progress of the project,so it is necessary to find a simpler alternative method to simplify the test and reduce various cost inputs.Strength:150 mm cube specimens with a side length of 150 mm(eliminate particles above 40 mm)and 450 mm cube specimens with a side length of 450 mm(full-graded test specimens)were prepared.The 150 mm cube specimens were cured for 14 days and 28 days,with a side length of 450 mm.The compressive strength test was carried out after reaching the corresponding prescribed age of cured cubes for 180 days.For the obtained compressive strength test data,linear fitting was performed by the least square method,and the linear relationship between the 14-day age of the 150 mm cube specimen and the 180-day age of the450 mm cube specimen was obtained.In terms of density,the rolling test site for the density test is arranged on the left bank platform between the upstream of the dam and the downstream of the cofferdam,with an area of 2,400 m2(40 m×60 m).Twenty-eight measuring points were evenly distributed in the test site.First,the density was checked by a nuclear densitometer,and then a pit was dug at the same location for density parallel inspection by irrigation method.The diameter of the test pit was 450 mm and the depth was 450 mm.Similarly,the least square method is used to linearly fit the measured data,and the linear relationship fitting formula of the density resu

关 键 词：胶凝砂砾石材料 质量控制 抗压强度 密度 线性拟合 

分 类 号：Tv432[水利工程—水工结构工程]