盾构法粉细砂渣料配制同步注浆材料及改性研究  

Study on the preparation and modification of synchronous grouting materials with fine sand slag by shield machine

作　　者：王周渊 沈尔卜 田松 阎宝宝 李涛涌 杨武 WANG Zhouyuan;SHEN Erpu;TIAN Song;YAN Baobao;LI Taoyong;YANG Wu(CCCC Wuhan Harbor Engineering Design and Research Institute Co.Ltd.,Wuhan 430040,China;CCCC Second Airlines Wuhan Harbor New Materials Co.Ltd.,Huanggang 438300,China;CCCC-2 Chengdu Urban Construction Engineering Co.Ltd.,Chengdu 610000,China)

机构地区：[1]中交武汉港湾工程设计研究院有限公司,湖北武汉430040 [2]中交二航武汉港湾新材料有限公司,湖北黄冈438300 [3]中交二航局成都城市建设工程有限公司,四川成都610000

出　　处：《新型建筑材料》2023年第2期101-104,146,共5页New Building Materials

摘　　要：依托福州地铁项目,采用盾构粉细砂渣料等质量取代河砂制备同步注浆材料,研究了水胶比、胶砂比、膨水比及粉灰比对注浆材料性能的影响。结果表明:随粉细砂取代率的增大,同步注浆材料性能逐渐劣化;对粉细砂同步注浆材料稠度的影响顺序为:水胶比>胶砂比>粉灰比>膨水比、对抗压强度的影响顺序为:水胶比>胶砂比>膨水比>粉灰比;当水胶比为0.75、胶砂比为0.6、膨水比为0.18、粉灰比为3时,其初始及1 h稠度分别为124、115 mm,初始及1 h流动度分别为235、225 mm,泌水率为2.0%,3、28 d抗压强度分别为0.9、2.9 MPa,满足现场施工需求。Relying on the Fuzhou Metro Project,synchronous grouting materials were prepared by quality ratio replacement of river sand with shield silt fine sand slag. The influence rules of water-to-mortar ratio,mortar-to-sand ratio,swelling water ratio and fly ash-to-cement ratio on the properties of grouting materials were analyzed. The results show that with the increase of fine sand con-tent,the properties of synchronous grouting materials gradually deteriorate. The main and secondary factors influencing the consistency and compressive strength of the fine sand synchronous grouting material are:water-to-mortar ratio>mortar-to-sand ratio> fly ash-to-cement ratio >swelling water ratio,water-to-mortar ratio>mortar-to-sand ratio> swelling water ratio >fly ash-to-cement ratio,respectively.When the water-to-mortar ratio is 0.75,the mortar-to-sand ratio is 0.6,the swelling water ratio is 0.18,and the fly ash-to-cement ratio is 3,the consistency and 1 h consistency retention values reach 124 mm and 115 mm,respectively,the initial fluidity and 1 h fluidity retention values are 235 mm and 225 mm,the water bleeding rate is 2.0%,and the compressive strength of 3 d and 28 d reaches 0.9 MPa and 2.9 MPa,respectively,meeting the needs of on-site construction.

关 键 词：地铁盾构施工 同步注浆材料 废弃粉细砂 固废利用 正交试验 

分 类 号：TU472[建筑科学—结构工程]