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  • Soil remediation, one discipline within the broader scope of environmental remediation, is the process of decontaminating soil. RECON is an industry leader in soil and sludge stabilization and solidification.
  • A secant wall is used in deep foundations in situations where the surface soil layers are unstable.
  • Among the processes used in soil remediation, excavation and dredging are among the most common. The process involves extracting unrecoverable contaminated soil.
  • Secant pile walls are one of the most economical methods of creating effective water control barriers for building structural walls, top-down tunnels and dams.
  • Deep Soil Mixing is a in-situ soil improvement technology used to construct cutoff or retaining walls and to treat contaminated soils.
  • This sludge pond is a good candidate for bio remediation or stabilization.
  • RECON's excavator is capable of digging a slurry wall up to 100 ft deep. Slurry walls have been used for decades to provide cost-effective, long-term solutions for many groundwater control problems.
  • Soil remediation project using remote placement conveyor.
  • Driving concrete pile to strengthen and support structural foundations.
  • Slurry wall construction is used to create non-structural barriers (Cutoff Walls, Slurry Trenches), which are constructed underground to impede groundwater flow.

Concrete Diaphragm Walls

 

Diaphragm walls are commonly used in congested areas for retention systems and permanent foundation walls. They can be installed in close proximity to existing structures with minimal loss of support to existing foundations. In addition, construction dewatering is not required, so there is no associated subsidence. Diaphragm walls are created by removing and replacing in-situ soil with a material of known characteristics. A series of deep, intersecting, rectangular trenches are excavated in the soil or rock, and are subsequently filled with material of controlled quality, which forms a structural support wall. Diaphragm walls have been used as deep groundwater barriers through, and under dams. In some applications, they are constructed with a non-reinforced plastic concrete material.

Concrete Diaphragm Wall

 

RECON was contracted to design and build a Limestone Unloading Pit (LUP) at a power plant in Ohio. Limestone loaded trains pass over the top of the LUP, supported by a 42-inch thick reinforced concrete "diaphragm wall", which is at depths of more than 50 feet below grade.

 

diaphragm walls

 

Project Features

 

• Excavating segments utilizing a crane and clam bucket, between temporary "guide walls" to maintain alignment

 

• Securing temporary metal templates on the guide wall

 

• Reinforcing steel cages were fabricated and carefully lowered into the panel excavation

 

• Placing concrete into the excavation using tremie pipes to complete the diaphragm wall panel

 

• Repeating this process to create the individual panels of the permanent wall of the LUP.