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| | Engineering consequences of ground conditions on NATM works at London Bridge Station, Jubilee Line Extension (Site not responding. Last check: 2007-11-06) |
 | | However, when increase in lining stress is plotted against the distance from the face, Fig.12b, it may be seen that beyond 10 to 12m, restart of excavation has no effect on the lining and therefore, no effect on the ground at that location. |
 | | The tunnel linings squat in response to the loading regime, such that the tunnel soffit moves downward whilst the walls move outwards. |
 | | Therefore, the lining moves downward due to ground loading and the lining walls move outwards presumably reversing the ground relaxation caused by plastic deformation. |
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