| 摘要 |
Method in which the following operations are carried out: a) digging an exploration hole ( 8 ) in order to open up a main pipeline ( 2 ) which has an upper edge ( 10 ) which extends at an upper level ( 12 ) which is substantially constant relative to the ground ( 6 ), b) using a branch connection ( 14 ) which has a support surface ( 16 ) and a shaft ( 18 ) to which the branch pipe is connected, c) positioning the support surface ( 16 ) of the branch connection ( 14 ) against the main pipeline ( 2 ) so that the shaft ( 18 ) is below the upper level ( 12 ) of the main pipeline ( 2 ), d) fixing the branch connection ( 14 ) to the main pipeline ( 2 ), e) placing the branch pipe and the main pipeline ( 2 ) in communication, f) refilling the exploration hole ( 8 ), whilst keeping the branch pipe below the upper level ( 12 ) of the main pipeline ( 2 ).
|
