| 摘要 |
The method and the system are used in building of installation types of equipment and allow multiple use of the devices included in the system. By the method an excavation is made in which blending concrete is laid and at least one flexible canal-forming piece is placed and locking devices are fitted on it. Air is forced in the canal-forming piece and earth-wet concrete is placed between the locking devices and after its initial setting the air is released and the canal-forming piece is pulled out. The locking devices are removed immediately after the concrete is laid over the canal-forming pieces. The system includes canal-forming pieces and locking devices, each canal-forming piece consists of at least two flexible sleeves fitted inside each other, and each of the locking devices has U-shaped sections formed in order to be engaged over the external sleeve of the canal-forming piece fitted in it. 7 claims, 3 figures
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