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Analysis of a circular tunnel lining, considering the seepage through the lining and the consolidation-grouted zone
Conclusions 1. Loadbearing linings should be designed for the difference between the pressure in the tunnel and the ground-water pressure P0-P2 without taking into consideration the backpressure P1 on the lining. 2. In tunnels with load-bearing linings, the consolidation grouting reduces the load on the lining only as a result of the increase of the modulus of elasticity of the surrounding rock and of the compression of the lining under the grouting pressure [4], but not as a result of the increase (for P0>P2) or decrease (for P2>P0) of the backpressure on the lining, i.e., the possibilities of the consolidation grouting are not fully utilized. The consolidation-grouted zone is more fully utilized in tunnels with a thin, compensating lining of a nonbearing nature, in which the pressure is transmitted to the consolidation-grouted zone [5].
Analysis of a circular tunnel lining, considering the seepage through the lining and the consolidation-grouted zone
Conclusions 1. Loadbearing linings should be designed for the difference between the pressure in the tunnel and the ground-water pressure P0-P2 without taking into consideration the backpressure P1 on the lining. 2. In tunnels with load-bearing linings, the consolidation grouting reduces the load on the lining only as a result of the increase of the modulus of elasticity of the surrounding rock and of the compression of the lining under the grouting pressure [4], but not as a result of the increase (for P0>P2) or decrease (for P2>P0) of the backpressure on the lining, i.e., the possibilities of the consolidation grouting are not fully utilized. The consolidation-grouted zone is more fully utilized in tunnels with a thin, compensating lining of a nonbearing nature, in which the pressure is transmitted to the consolidation-grouted zone [5].
Analysis of a circular tunnel lining, considering the seepage through the lining and the consolidation-grouted zone
Ponimatkin, P. U. (author)
Hydrotechnical Construction ; 6 ; 261-266
1972-03-01
6 pages
Article (Journal)
Electronic Resource
English
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