Full
Outline
To address the challenge of managing excessive deformation defects in operational shield tunnels in China, a comprehensive tunnel deformation correction technology system centered on the Radial Cement-Soil Pile Method for Correcting Excessive Tunnel Deformation has been developed. This system actively constructs a spatial network reinforcement body composed of horizontal, vertical, and inclined cement-soil piles in the soil outside the tunnel. It formulates an optimized construction sequence of "first constructing horizontal piles to restrict convergence, then constructing vertical piles to lift settlements, and finally constructing inclined piles to coordinate deformation" and adopts refined strategies such as graded pressure control to accurately apply correction forces. Meanwhile, based on the principle of minimum potential energy, a semi-empirical formula for predicting the single-ring lifting and convergence correction values has been derived, thereby forming a complete set of technical measures. This technology system has been applied and verified in a metro tunnel section in Northeast China. The results show that the Radial Cement-Soil Pile Method for Correcting Excessive Tunnel Deformation can synergistically correct settlement and convergence issues, effectively stabilize the post-construction settlement rate, and significantly improve leakage defects. The research results provide an innovative technical solution for the treatment of defects in operational shield tunnels and have reference value for similar engineering projects.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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