| 摘要 |
A compression body ( 7 ) is inserted into the contraction joint ( 6 ) between two tunnel lining elements ( 2, 3 ), which body deforms in response to a compressive load caused by the tunnel lining elements' ( 2, 3 ) moving towards each other. The compression body ( 7 ) is composed of a material containing voids, and has a compressive strength of at least 1 MPa and a void fraction of between 10% and 90% of its total volume. The compression body ( 7 ) may be composed, for example, of steel foam, or of a mixture which contains cement and blown-glass particles or plastic particles. When a predetermined compressive load is exceeded, the voids within the compression body ( 7 ) collapse in a stepwise manner, or are compressed in a stepwise manner.
|
