Study on arrangement law of grouting bolt in mountain tunnel

Authors

ZHAO Licai, Department of Construction Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan 10607, China; 2. No. 3 Engineering Co., Ltd., China Railway 19th Bureau Group Corporation Limited, Shenyang, Liaoning 110136, ChinaFollow

Abstract

In the sandy soil area with abundant water content, grouted bolts can solve the problems of poor stability of surrounding rock and groundwater erosion in tunnel construction. However, the unreasonable arrangement of grouted bolts will cause the waste of slurry and fail to achieve the predetermined grouting effect. Based on the differential equation of slurry diffusion, this paper realized the numerical simulation of grouted bolts in a tunnel through software secondary development. Combined with mathematical statistics, the influence of the distance of grouted bolts, tunnel radius, and grouting time on the formation of grouting rings in mountain tunnels was studied. The results show that there is a power function relationship between the distance of grouted bolts and the grouting time and an exponential function relationship between tunnel radius and grouting time. In the multi-core circular tunnel, the spacing between grouted bolts in different radius segments needs to be different, and the conversion relationship between the distance of grouted bolts can be completed by the formula obtained by research.

Publication Date

3-17-2023

DOI

10.14048/j.issn.1671-2579.2023.01.030

First Page

173

Last Page

177

Submission Date

March 2025

Recommended Citation

Licai, ZHAO (2023) "Study on arrangement law of grouting bolt in mountain tunnel," Journal of China & Foreign Highway: Vol. 43: Iss. 1, Article 74.
DOI: 10.14048/j.issn.1671-2579.2023.01.030
Available at: https://zwgl1980.csust.edu.cn/journal/vol43/iss1/74