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Open AccessArticle

Transient Analysis of Grout Penetration With Time-Dependent Viscosity Inside 3D Fractured Rock Mass by Unified Pipe-Network Method

1
School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China
2
State Key Laboratory for Geo-mechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, China
3
Geotechnical & Structural Engineering Research Center, Shandong University, Jinan 250061, China
*
Author to whom correspondence should be addressed.
Water 2018, 10(9), 1122; https://doi.org/10.3390/w10091122
Received: 18 July 2018 / Revised: 10 August 2018 / Accepted: 13 August 2018 / Published: 23 August 2018
Grouting is widely used for mitigating the seepage of underground water and enhancing the stability of fractured rock mass. After injection, the viscosity of the grout gradually increases until solidification. Conventional multifield analysis models ignoring such effects greatly overestimate the penetration region of the grout and the stability of the grouted rock structures. Based on the 3D unified pipe-network method (UPM), we propose a novel numerical model considering the time-dependent viscosity of the grout, therein being a quasi-implicit approach of high efficiency. The proposed model is verified by comparing with analytical results and a time-wise method. Several large-scale 3D examples of fractured rock mass are considered in the numerical studies, demonstrating the effectiveness and robustness of the proposed method. The influence of the time-dependent viscosity, fracture properties, and grouting operation methods are discussed for the grout penetration process. View Full-Text
Keywords: grout penetration; transient analysis; time-dependent viscosity; unified pipe-network method grout penetration; transient analysis; time-dependent viscosity; unified pipe-network method
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Sun, Z.; Yan, X.; Liu, R.; Xu, Z.; Li, S.; Zhang, Y. Transient Analysis of Grout Penetration With Time-Dependent Viscosity Inside 3D Fractured Rock Mass by Unified Pipe-Network Method. Water 2018, 10, 1122.

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