耐高水压盾构用盾尾密封油脂及其性能表征

王德乾; 斯芳芳; 谢宇飞; 李博; 王明杰; 焦文杰; 贾恒琼; 廖剑平

doi:10.3973/j.issn.2096-4498.2022.08.007

隧道建设 >

2022 , Vol. 42 >Issue 8: 1386 - 1394

DOI: https://doi.org/10.3973/j.issn.2096-4498.2022.08.007

研究与探索

耐高水压盾构用盾尾密封油脂及其性能表征

王德乾 ,
斯芳芳 ,
谢宇飞 ,
李博 ,
王明杰 ,
焦文杰 ,
贾恒琼 ,
廖剑平

展开

（1. 北京中铁新材料技术有限公司，北京〓102600； 2. 中铁第五勘察设计院集团有限公司，北京〓102600； 3. 中铁物资集团有限公司，北京〓100189； 4. 中国铁道科学研究院集团有限公司金属及化学研究所， 北京〓100081； 5. 中铁建华南建设（广州）高科技产业有限公司，广东广州〓511458）

王德乾（1981—），男，山东潍坊人，2011年毕业于中国科学院化学研究所，高分子化学与物理专业，博士，正高级工程师，现从事隧道与地下工程材料产品的研发与成果转化工作。Email： 296467149@qq.com。

网络出版日期: 2022-09-09

收起

Property Characterization of Shield Tail Sealing Grease for High Water Pressure

WANG Deqian ,
SI Fangfang ,
XIE Yufei ,
LI Bo ,
WANG Mingjie ,
JIAO Wenjie ,
JIA Hengqiong ,
LIAO Jianping

Expand

(1.Beijing China Railway Advanced Material and Technology Co.,Ltd.,Beijing 102600,China;2.China Railway Fifth Survey and Design Institute Group Co.,Ltd.,Beijing 102600,China;3.China Railway Material Group Co.,Ltd.,Beijing 100189,China;4.Institute of Metal and Chemistry,China Academy of Railway Sciences Group Co., Ltd., Beijing 100081,China;5.CRCC South Construction (Guangzhou) Hi-tech Industry,Guangzhou 511458,Guangdong,China)

Online published: 2022-09-09

Fold

摘要

针对国内跨江越河等高水压(0.4~0.8 MPa)盾构施工所需盾尾密封油脂被进口产品垄断的难题，通过正交试验研究盾尾密封油脂各个配方组分之间的相互作用。结果表明: 1)增稠流变剂的引入，提供了层间距为5~10 nm的片层结构，为基础油和聚异丁烯提供了进入空间，实现了增稠分散，提高了耐高水压盾尾密封油脂的剪切流变性，保证了稠度与泵送性的平衡； 2) 不同尺度的天然可降解纤维与配方中其他组分形成复合纤维增强阻水结构，使得耐高水压盾尾密封油脂的水击穿压力达7 MPa，是进口产品的1.75倍。在实现盾尾密封油脂稠度和泵送性适中的同时，大大提高了盾尾密封油脂的抗水压密封性，为我国跨江越河等高水压复杂地层盾构用高端盾尾密封油脂的进一步研发与转化打下坚实的基础。

关键词：

盾尾密封油脂

; 耐高水压密封性; 泵送性; 水击穿压力

本文引用格式

王德乾 , 斯芳芳 , 谢宇飞 , 李博 , 王明杰 , 焦文杰 , 贾恒琼 , 廖剑平 . 耐高水压盾构用盾尾密封油脂及其性能表征[J]. 隧道建设, 2022 , 42(8) : 1386 -1394 . DOI: 10.3973/j.issn.2096-4498.2022.08.007

Abstract

The shield tunneling in high water pressure (0.4~0.8 MPa) when crossing the rivers in China is monopolized by imported shield tail sealing grease. Through orthogonal studies, the interaction of the sealing grease′s components is investigated to address this issue. The findings reveal the following: (1) By introducing a thickening rheological agent, the formula creates a lamellar structure with layers spaced 5~10 nm apart, giving base oil and polyisobutylene access space. This allows for the realization of thickening and dispersion, improves the shear rheology of shield tail sealing grease under high water pressure, and ensures the balance between consistency and pumpability. (2) By adding various scales of naturally degradable fibers and other ingredients to the formula, a composite reinforced water resistance structure is created, resulting in 7 MPa water breakdown pressure of highwatertightness pressure sealing grease, which is 1.75 times as much as the imported product. As a result, the reasonable consistency, and pumpability of shield tail sealing grease are achieved, and the water tightness is also significantly improved. It has laid a solid foundation for the further research, development, and transformation of highend shield tail sealing grease for shields in high water pressure and complex strata such as river crossings in China.

Key words： shield tail sealing grease; watertightness under high pressure; pumpability; water breakdown pressure

Options

文章导航

〈

〉

模态框（Modal）标题

摘要

本文引用格式

Abstract