Triumphs in Rehabilitating Chapman's Peak Drive Extensometer

Terra Monitoring triumphed in securing a pivotal contract for the restoration of the MPBX anchor rod at Chapman's Peak Drive Half Tunnel in the Western Cape, marking a significant milestone in our journey towards excellence. Our team deployed vibrating wire displacement transducers coupled to anchor rods, forming a robust multi-point extensometer system. Historically embedded into the mountain face, these sensors monitored rockface and overhang movements. However, challenges arose due to the corrosive environment and moisture, rendering the sensors susceptible to damage caused by water infiltration into the sliding shaft components.

Undeterred, we innovatively tackled this issue by utilising waterproof sensors and implementing a grease seal to combat water ingress and prevent damage. Despite these proactive measures, previous damages on one extensometer anchor rod necessitated a repair endeavour.

The headworks were meticulously drilled out, exposing the stainless-steel rod running to the anchor. Through precision drilling and tapping with an M 5 tap, we successfully attached a threaded bar directly to the anchor rod, subsequently connecting it to the sensor. Terra Monitoring approached the site with four distinct repair plans, evaluating each based on on-site findings, showcasing our adaptability and resilience in overcoming challenges and optimally mending instruments.

Amidst the distracting yet breathtaking backdrop of the ocean below and a cliff face in front, our team navigated the complexities with unwavering determination. The result? A triumphant success story - the repair of the multipoint extensometer headworks was flawlessly executed. Solidifying our reputation as a reliable and adept player in the field of monitoring, and instrumentation including repairs and installations.