2. Technological Aspects in Alto Mayo Earthquake Recovery

In 1990, on 29th May, Alto Mayo experienced an earthquake measuring 6.2 on the Richter scale, resulting in the death of about 70 people, injuring 1,600, and damaging or destroying nearly 6,000 homes. A year later, another earthquake of the same magnitude occurred, leading to 40 deaths, 700 injuries, and the destruction of further homes.

The Alto Mayo region in Peru faced significant destruction due to two earthquakes in quick succession. The first earthquake occurred on May 29, 1990, causing a considerable loss of life and property. Less than a year later, another quake hit the same region, exacerbating the already dire situation. Each earthquake caused injuries and left thousands of homes either damaged or completely destroyed, highlighting the region's vulnerability to seismic activity.

Think of Alto Mayo like a house of cards. If someone shakes the table (the earthquake), cards may fall or get damaged. If a second shake occurs soon after, more cards will fall, leading to more significant damage overall.

The practical action group focused on long-term reconstruction rather than short-term relief, assessing beneficiary needs through surveys and feedback from local residents and leaders to calculate expenditures for recovery.

After the earthquakes, a group known as the Practical Action Group positioned themselves to assist in the long-term recovery efforts. They prioritized understanding the community's needs by conducting surveys and gathering feedback from locals. This information helped them to accurately assess the costs associated with rebuilding, ensuring that they could effectively address the people's most pressing recovery needs.

Imagine planning a big family dinner after a house fire. Before cooking, you'd ask family members about their favorite meals and calculate how much food you'll need. This helps ensure that everyone is satisfied and you're utilizing your resources efficiently.

Consultation with local leaders resulted in the decision to discard rammed earth and adobe in favor of quincha timber-frame construction, which offers better earthquake resistance.

In rebuilding efforts, the Practical Action Group consulted local leaders and stakeholders about building materials. They found that traditional materials like rammed earth and adobe were not ideal for earthquake resistance. Instead, they adopted quincha, a construction technique that uses a timber frame enhanced with bamboo, which provided greater resilience to seismic events. This change reflects a critical adaptation in construction practices aimed at improving safety and durability.

Consider a safety helmet for construction workers. While a hat (traditional adobe) provides some protection, a safety helmet (quincha) is designed specifically to absorb shocks and protect against impacts much more effectively.

The quincha construction involves timber studs embedded in concrete, with a bamboo screen woven and coated with mud to create strong, lightweight walls that resist earthquake damage.

The quincha construction technique consists of creating a sturdy framework of timber studs, which are deeply embedded into concrete foundations. This frame serves as a base for a woven bamboo screen, which is then coated with a mixture of mud and later, a second coat to fix any cracks. This method not only makes the walls lighter but also provides significant structural integrity, making them better able to withstand the shaking during an earthquake.

Think of a spider web (bamboo) held up by thick branches (timber). The branches hold strong against winds (earthquakes), while the web is flexible and can sway without breaking. This harmony between strength and flexibility is what makes quincha effective.

Quincha construction includes upgraded features like concrete foundations, treated wooden columns to resist humidity, and careful jointing between columns and beams for structural integrity.

The upgrading of quincha construction included several innovations that aimed to enhance its stability. Concrete foundations provide a strong base, while treated wooden columns resist damage from moisture. Moreover, the careful design of joints where columns meet beams ensures that the entire structure works together effectively during earthquakes, reducing the likelihood of collapse.

Consider how a well-anchored tree (foundation) with strong branches (columns and beams) can withstand strong winds. If the branches are carefully attached to the trunk, the entire tree can stand firm even during storms.

Training sessions for local residents were organized to promote the new building technology, with teams of 20 to 40 members established to implement these techniques across different sites.

As part of the recovery initiative, the Practical Action Group organized training sessions for local residents, teaching them the new quincha building techniques. Teams consisting of 20 to 40 members were formed to not only help in constructing buildings but also to spread knowledge about the construction method throughout the community. This focus on community involvement helped empower residents and ensure that the new techniques were adopted widely.

Think of a community cooking class where a chef teaches residents how to prepare healthy meals. Everyone learns to cook, but they also share those recipes with their families and friends, spreading knowledge and skills throughout the community.

Within four years, the number of improved quincha houses had significantly increased, with a remarkable rise in the construction of quincha homes in the region due to reduced costs and locally available resources.

The introduction of quincha construction had a transformative effect on the housing situation in Alto Mayo. Within just four years, the number of improved quincha houses increased dramatically, indicating that many residents adopted this innovative method. The success was largely due to lower construction costs and the availability of necessary materials and skills within the community, leading to better housing and improved economic conditions for the people.

Think about how a new, cheaper recipe for a beloved dish can spread through a community. As everyone makes it more often, people enjoy better meals and spend less money overall, improving their quality of life.

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