2006-08-02 08:12:43 · 2 answers · asked by civil 1 in Science & Mathematics ➔ Engineering
Unless there are mechanical fasteners or tunnel geometry (such as a turn) that will hold in the plug, its ability to hold back the head of water will depend on the friction between the tunnel wall and the plug. Not a civil engineer, but the resistance/square foot should be available in a civil engineering reference book. Then its simply a matter of surface area of the plug time resistance = water head. Hope this helps.
Found this link: http://www.eng-tips.com/viewthread.cfm?qid=11539
2006-08-02 08:24:29 · answer #1 · answered by williegod 6 · 0⤊ 0⤋
Since most concrete actually shrinks when it cures, your chances for success with cocnrete seems slim. You could try a non-shrink grout, then the holding power would be a factor of the resistance between it and the wall.
2006-08-02 17:09:58 · answer #2 · answered by Jeffrey S 6 · 0⤊ 0⤋