砂岩与卵石混合骨料胶凝材料坝现场变形直剪试验研究  

Experimental Study on on-site Deformation and Direct Shear of Aggregate Cementitious Material Dam with Sandstone and Pebble

作　　者：彭明亮[1] 胡人炭[1] 杨小奇 PENG Mingliang;HU Rentan;YANG Xiaoqi(Sichuan Water Resource and Hydroelectric Investigation&Design Institute, Chengdu, Sichuan, 610072)

机构地区：[1]四川省水利水电勘测设计研究院,四川成都610072

出　　处：《四川水力发电》2020年第3期94-100,共7页Sichuan Hydropower

摘　　要：抗剪和变形指标是胶凝材料坝设计中重要的参数,笔者结合金鸡沟水库大坝砂岩与卵石5∶5掺配的混合骨料胶凝材料坝稳定及应力应变复核计算需要,开展了砂岩骨料掺50%、60%、70%混合骨料胶凝材料和胶结堆石4种坝体现场变形和抗剪试验研究。研究表明:为保证胶凝砂砾石块坝均匀密实,一是要加强施工质量的控制,保证坝体施工铺填均匀,碾压得密实;二是控制砂岩骨料掺量。因此,胶凝砂砾块石坝,尤其是砂岩与卵石混合骨料胶凝材料坝抗剪和变形指标能满足中低坝应力应变及稳定之需,可以推广使用。Shear and deformation indexes are important parameters in the design of cementitious material dam.According to the stability and stress-strain recheck calculation of the dam with 5∶5 mixed aggregate cementitious material of sandstone and pebble in Jinjigou Reservoir,four kinds of on-site deformation and shear tests are carried out for the dam with 50%,60%,70%mixed aggregate cementitious material of sandstone and cementitious rockfill dam.The results show that:in order to ensure the uniform and dense of the dam,the first is to strengthen the construction quality control,to ensure that the dam body is evenly paved and compacted;the second is to control the content of sandstone aggregate.Therefore,the shear and deformation indexes of cementitious gravel dam,especially the aggregate cementitious material dam with sandstone and pebble,can meet the needs of stress-strain and stability of medium and small scale dams,and can be widely used.

关 键 词：胶凝砂砾块石坝 胶结堆石 砂岩骨料 变形特征 

分 类 号：TV223.21[水利工程—水工结构工程] TV422