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seepage cut-off wall and relief wells

seepage cut-off wall and relief wells

seepage cut-off wall and relief wells

(OP)
Hey all this is my first post so bear with me.

We have this levee that needs underseepage control for about 1980 ft of its length. The levee is set on a fine-grained (CL/ML) layer of soil that varies in thickness and this sits on top of a permeable sandy aquifer that can be anywhere from 60-150 ft thick down to bedrock.  The severity of the underseepgae along this length varies. There are certain reaches where our studies have determined that relief wells do the job but there are other reaches where we need a cut-off wall. Essentailly we have reaches were we have a line of relief wells then a cut-off wall and then more wells.

Is there a need to have overlap between the wall reaches and the well reaches. In other words is there a need to have part of the wall extend so that it is "in-front" of the wells to account for seepage that will wrap around the wall.

Thanks!

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