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Underground Water Control

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Water Control Blog

Shrinking Concrete

By Chris on 02-11-2018

Concrete shrinks.  In this instance, it was allowing an unwanted transfer of water.  When constructed, this corrugated HDPE pipe was encased in concrete to limit erosion and to ensure that no back-flow could occur.  A back-flow valve was also placed inside the pipe.  However, over time, back-flow was occurring.  What had happened was the concrete around the outside of the pipe had shrunk, thus leaving a void the entire length of the pipe. 

The solution was to inject Hyperflex, a single component chemical grout by SealGuard, Inc.  The Hyperflex was injected from the inside of the pipe to fill the void space that the shrinking concrete has created.  Once reacted, the grout created a polyurethane barrier to stop the back-flow.  The Hyperflex was injected by Sub-Technical, Inc. using mechanical injection packers and an electric grout pump. 

Retaining Pond Standpipe

By Chris on 11-10-2018

Mine discharge was infiltrating an overflow flow pipe located in a retention pond.  The continuous flow of the cont... Read More

Limestone Pit Water Control

By Chris on 21-06-2018

Sub-Technical, Inc. shows the ability of SealGuard II (H2O Stop) to stop large inflows of water.  This particular l... Read More

Ground Monitoring Equipment Placement & Installation

By Chris on 05-04-2018

Ground movement monitors and how they are placed varies greatly.  Factors such as its intended purpose, location, m... Read More

Tunneling with Help from Above

By Chris on 07-03-2018

Sub-Technical, Inc. recently went “Above-Technical” for a week-long project. Seventy feet below the surface,... Read More