Receiving pit at EOP
Receiving pit at EOP
(OP)
I'm looking at a highway work permit for a new water line connection. They are proposing to jack a waterline under the highway. The receiving pit will be 8 wide by 8 feet deep, right at the back of the curb. The waterline is below a 24" CPP storm drain.
I have two concerns - supporting the pavement during the work, and supporting the storm drain.
Would you require driven sheeting, rather than a sheeting box?
I have no doubt the storm drain could support its own weight, but what if it's carrying water? Half full would be ~800#m of water.
Advice would be welcome.
I have two concerns - supporting the pavement during the work, and supporting the storm drain.
Would you require driven sheeting, rather than a sheeting box?
I have no doubt the storm drain could support its own weight, but what if it's carrying water? Half full would be ~800#m of water.
Advice would be welcome.
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"...students of traffic are beginning to realize the false economy of mechanically controlled traffic, and hand work by trained officers will again prevail."
Wm. Phelps Eno, ca. 1928





RE: Receiving pit at EOP
If you've never witnessed this before the encasment pipe will be forced into the dirt and an auger in the encasement pipe will carry the dirt through it back to the bore pit. This should be just as stable as the existing earth if not more.
As for the pit being directly behing the curb I guess I could see a possible issue if a heavy storm were to come through and cause some erosion of the earth under the curb or maybe existing waterlogged cohesionless soils sloughing off under the curb. This typically wouldn't be the case where I'm located and the bore pit probably won't be open to long to the weather. If something does happen it should be the contractors understanding that he/she has to replace whatever they destroy.
RE: Receiving pit at EOP
I should have mentioned that this area is known for its fine soft sand and high water tables.
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"...students of traffic are beginning to realize the false economy of mechanically controlled traffic, and hand work by trained officers will again prevail."
Wm. Phelps Eno, ca. 1928
RE: Receiving pit at EOP
RE: Receiving pit at EOP
Maybe ascii art will help. This is a cross section of the pit, looking downstation along the road. "O" is the drain, "o" is the main. --- is the casing.
_____ ____________
| |
| O |
| |
-----| o |
| |
------------------------------------------
"...students of traffic are beginning to realize the false economy of mechanically controlled traffic, and hand work by trained officers will again prevail."
Wm. Phelps Eno, ca. 1928
RE: Receiving pit at EOP
------------------------------------------
"...students of traffic are beginning to realize the false economy of mechanically controlled traffic, and hand work by trained officers will again prevail."
Wm. Phelps Eno, ca. 1928
RE: Receiving pit at EOP
RE: Receiving pit at EOP
RE: Receiving pit at EOP