| 摘要 |
Construction-material bodies for producing frictional contact between support and rock, in particular in the case of larger and irregular rock excavations, which bodies consist of a fabric of high breaking strength with appropriate valves and, for adaptation to the excavation, can be filled first of all with compressed air and then with a construction material. In order to obtain complete filling and also adequate dewatering of the construction-material mixture in an efficient manner, a body (7) of this type has an outer skin (8) of a fabric permeable to water and an inner skin (9) of air-tight material, the inner skin (9) being provided with at least one filling and one relief valve (10, 11) passing through the outer skin (8), and the outer skin (8) being provided with at least one filling valve (13). <IMAGE>
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