How long-range, wireless technology helps monitor groundwater for a landfill project in Los Angeles
Challenge
Without proper engineering controls and containment infrastructure, municipal solid waste landfills have the potential to introduce contaminants to soil and groundwater surrounding the site. If not contained, these contaminants could potentially affect groundwater quality and its use for domestic water supplies.
Worldsensing partner Sixsense USA was tasked with monitoring excavation deformation during construction project at a landfill in Los Angeles. The landfill is committed to operating with environmental practices and policies that are good for their customers, local businesses and residents. Their local team of environmental managers, engineers and scientists ensure that the long-term management of the landfill materials are protective of the environment.
Solution
Sixense deployed a wireless, real-time excavation deformation monitoring solution during the project to monitor for potential deformation of the stability subgrade excavation. The solution features Worldsensing wireless data loggers connected to existing piezometers to monitor groundwater pressure, inclinometers to monitor subsurface deflections, and tiltmeter deformation to monitor foundation movement at discrete locations across the construction area.
The purpose of the project was to construct a stabilization in an area of the site that is prone to landslides and related geologic instability before site development as a landfill. The construction involved excavation into the geologically sensitive terrain composed of interbedded siltstone, sandstone, and claystone that had been fractured by now-inactive faults.
Benefits
The remote solution was deployed in a difficult-to-access, changing construction site enabling the team to obtain real-time data wirelessly without having to frequently send a technician to the site.
The use of wireless monitoring generates a real-time view and time series of pore water pressure, horizontal displacement at depth, and angular distortion of foundations during the construction.
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