Study on the Diffusion Mechanism of Infiltration Grouting in Fault Fracture Zone Considering the Time-Varying Characteristics of Slurry Viscosity Under Seawater Environment

IF 3.6 3区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Hongbo Wang, Yunchang Yu, Peiyuan Zhang, Chunyu Yang, Hao Wen, Fansheng Zhang, Sanlin Du
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Abstract

Fault fracture zones are rock formations commonly encountered in submarine tunnels, and the diffusion mechanism of slurry in fault fracture zones has a crucial impact on submarine tunnel reinforcement. Based on the seepage equation of Bingham fluid, the tortuosity parameter, fractal theory, and variable viscosity equation are introduced to establish a spherical permeation grouting model of Bingham fluid considering the slurry diffusion path and viscosity time variability. The viscosity variation law with time of sulfur aluminate cement slurry under different seawater admixture conditions was tested, and the time-varying equation of viscosity of sulfur aluminate cement slurry was obtained by fitting. A set of fault fracture zone permeation grouting test system was developed, and a fault fracture zone grouting simulation test was carried out. The study shows that the diffusion distance calculated without considering the influence of slurry diffusion path and seawater is 1.63–1.91 times of the test value, which obviously overestimates the diffusion distance; the diffusion distance calculated with considering the influence of diffusion path and seawater is 1.06–1.35 times of the test value, which is in good agreement with the test value. The research results can provide some theoretical support for the design of grouting in seawater environment.

Abstract Image

考虑海水环境下浆液粘度时变特性的断层断裂带渗透灌浆扩散机理研究
断层破碎带是海底隧道中常见的岩层,断层破碎带的浆液扩散机理对海底隧道加固有着至关重要的影响。在宾汉流体渗流方程的基础上,引入曲折参数、分形理论和粘度可变方程,建立了考虑浆液扩散路径和粘度时间变化的宾汉流体球形渗透灌浆模型。检验了不同海水掺量条件下硫铝酸盐水泥浆的粘度随时间变化规律,拟合得到了硫铝酸盐水泥浆粘度时变方程。开发了一套断层断裂带渗透灌浆试验系统,并进行了断层断裂带灌浆模拟试验。研究表明,在不考虑浆液扩散路径和海水影响的情况下,计算出的扩散距离是试验值的 1.63-1.91 倍,明显高估了扩散距离;在考虑扩散路径和海水影响的情况下,计算出的扩散距离是试验值的 1.06-1.35 倍,与试验值吻合较好。研究结果可为海水环境下的灌浆设计提供一定的理论支持。
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来源期刊
International Journal of Concrete Structures and Materials
International Journal of Concrete Structures and Materials CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL
CiteScore
6.30
自引率
5.90%
发文量
61
审稿时长
13 weeks
期刊介绍: The International Journal of Concrete Structures and Materials (IJCSM) provides a forum targeted for engineers and scientists around the globe to present and discuss various topics related to concrete, concrete structures and other applied materials incorporating cement cementitious binder, and polymer or fiber in conjunction with concrete. These forums give participants an opportunity to contribute their knowledge for the advancement of society. Topics include, but are not limited to, research results on Properties and performance of concrete and concrete structures Advanced and improved experimental techniques Latest modelling methods Possible improvement and enhancement of concrete properties Structural and microstructural characterization Concrete applications Fiber reinforced concrete technology Concrete waste management.
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