ORIGINAL RESEARCH
Grouting Reinforcement of Shallow
and Small Clearance Tunnel
| 1 | Department of Geotechnical and Structural Engineering Research Center, Shandong University, China |
| 2 | Jinan Municipal Engineering Design & Research Institute (group) CO.LTD., China |
CORRESPONDING AUTHOR
Xiao Zhang
Geotechnical and Structural Engineering Research Center, Shandong University, Jingshi Road No.17923, 250061, Jinan, China
Geotechnical and Structural Engineering Research Center, Shandong University, Jingshi Road No.17923, 250061, Jinan, China
Submission date: 2020-05-28
Final revision date: 2020-09-04
Acceptance date: 2020-09-08
Online publication date: 2021-04-01
Publication date: 2021-04-16
Pol. J. Environ. Stud. 2021;30(3):2609–2620
KEYWORDS
TOPICS
ABSTRACT
In order to solve the problem that shallow and small clearance tunnels are easy to cause city road
to collapse and chapped, taking the Jinan Yuhan Road Tunnel under typical geological conditions as
the research object, the stability criterion of the middle soil wall is determined using a mechanical
model of the tunnel middle wall. A grouting test under different loads of undisturbed soil in the tunnel
is designed, and numerical simulation of the grouting of the middle wall of different tunnel depths
and spacing is performed. The results show that the stability of the middle wall of the shallow and
small clearance tunnel is related to depth, spacing, and the physical-mechanical properties of soil. The
physical-mechanical properties of soil change little after grouting reinforcement with the same final
grouting pressure as the burial depth increases. The stability criterion curve of the middle wall of
Yuhan Road Tunnel is obtained by the measurement results of grouting test samples, and the numerical
simulation results obtained by the experimental parameters have a high degree of agreement with the
theoretical curve. Based on the stability criterion curve, sectional grouting was performed in Yuhan
Road Tunnel, and the soil around the tunnel was successfully reinforced.
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