Frank Georg Schulz | TERRATEST

LWD Applications in Civil Engineering Works

Jul 23rd 2015 at 11:48 PM

Light weight deflectometer devices make it easier to determine the compaction quality and soil bearing capacity of ground materials, pavements, and non-cohesive subbases. They allow for uncomplicated soil testing, providing a huge improvement on tedious traditional testing methods. The principle for light weight deflectometers was first developed as early as 1982 by a German company. Since then, the device's processes and mechanisms have been continuously optimized.

Thanks to the development of light weight deflectometers and its testing principles, analysis of in-built soil layers are carried out more quickly and without the need for bulky equipment and vehicle. This makes them suitable for testing sites and areas that are difficult to access. LWD machines have varied applications in many areas of civil engineering works. They are useful in road construction, railway and airport runway engineering, and other types of earthworks. They can also be used for quality control and protection of utility trenches and canal construction as well as in the examination and evaluation of foundation fillings and roadbeds.

Light weight deflectometers are suitable for self monitoring as they are designed based on universal standards. They are also easy to handle and provide immediately available results. The modern designs of LWDs feature a sturdy construction with an ergonomic configuration so they can easily be transported and operated by one person. Safety features are also installed to ensure security when the unit is in use or in storage.

The most recent version of load bearing capacity measurement device, LWD is highly useful during the early stages of construction especially when testing subgrade and other materials that are difficult to access using traditional testing methods and measuring equipment. It is also said that LWDs have great potential in supplementing and even replacing some of the now obsolete means to measure soil suitability during pavement design and construction phases. Some of the testing methods and equipment the light weight deflectometer supplements well include the falling weight deflectometer, dynamic cone penetrometer, static plate load testers, and vane test equipment.

The load bearing capacity of pavement surfaces is important to determine during the initial stages of the design process. This helps ensure the suitability of the area in question for the project at hand. While light weight deflectometers are fairly new in the scene, they are showing great promise when it comes to soil quality control for different civil engineering works and processes.

About The Author:

TERRATEST GmbH is world leader in development and manufacturing of Light Weight Deflectometers for dynamic load plate test. They offer the world’s first light weight deflectometer “TERRATEST 5000 BLU” with Bluetooth and voice navigation. For more information about their products visit their website!

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