- 目录
- 建筑石膏与胶凝材料
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盾构法粉细砂渣料配制同步注浆材料及改性研究
作者：王周渊1，2，沈尔卜1，2，田松3，阎宝宝1，2，李涛涌1，2，杨武1，2
（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）
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。
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
中图分类号：TU472 文献标识码：A 文章编号：1001-702X（2023）02-0101-04
Study on the preparation and modification of synchronous grouting materials with fine sand slag by shield machine
WANG Zhouyuan1，2，SHEN Erpu1，2，TIAN Song3，YAN Baobao1，2，LI Taoyong1，2，YANG Wu1，2
（1.CCCC Wuhan Harbor Engineering Design and Research Institute Co. Ltd.，Wuhan 430040，China；2.CCCC Second Airlines Wuhan Harbor New Materials Co. Ltd.，Huanggang 438300，China；3.CCCC-2 Chengdu Urban Construction Engineering Co. Ltd.，Chengdu 610000，China）
Abstract：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 content，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.
Key words：metro shield construction，synchronous grouting material，waste silty sand，solid waste utilization，orthogonal test