发明名称 |
Reinforced concrete lining segment incorporating nonreturn valve. |
摘要 |
A reinforced concrete lining segment includes a non-return valve (5) for the injection of grout, with particular application in tunnels and shafts. The non-return valve is cast-in the segment during manufacture thereof.
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申请公布号 |
EP0400814(A1) |
申请公布日期 |
1990.12.05 |
申请号 |
EP19900304747 |
申请日期 |
1990.05.01 |
申请人 |
C.V. BUCHAN (CONCRETE) LIMITED |
发明人 |
SMITH, CHRISTOPHER RICHARD;FORRESTER, CHARLES W. |
分类号 |
E21D11/08 |
主分类号 |
E21D11/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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