18th September 2011 Earthquake

Update: 29th April 2012
The progress at Sangkhola school is slow but strong. The slow progress is largely due to non-availability of qualified workforce which can work with Reinforced Cement Concrete (RCC ) as a construction material. The State Education Department has also expressed its desire to construct new buildings using RCC only, and is keen that the work is completed at its earliest. It is well understood and established that the damage during this earthquake has been primarily due to badly retained earth, retaining walls, and inadequate designing, especially of RCC joints. In many cases the soil wasn’t properly compacted; in some cases soil has been just dumped from other places in creating levelled land and is therefore very loose, and retaining walls were inadequate for the soil and therefore the building they were supporting. Due to the insufficient loose foundation soil, the structures underwent more shaking and resulted in greater damage despite Sikkim’s buildings having relatively good construction quality. Inadequate attention to design therefore seemed to be an important reason for the extensive damage caused by the earthquake.

Now, with a revised project plan we are expecting foundation work to complete by mid May; and structural skeleton with other finishing works envisaged to complete by the middle of June. See pictures of the foundation work here, where present emphasis is on preparing highly compacted foundation trenches to support RCC column pedestals.

We are looking at building the local contractor's competency in both technical and managerial aspects of construction. This made us put more experienced engineering team on the ground with Rakesh from SEEDS in the lead now along with the mason Ramesh from Patanka village in Gujarat, to facilitate the re-construction of the school.

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In addition, preparations are underway for reconstruction of the damaged buildings in three school campuses in the East district of Sikkim. We are additionally looking at overall Life Safety in these school campuses for future extreme events, and improvement of the local built environment of through awareness building and community participation exercises.

Sikkim Visit- Post 18th Sept. 2011 earthquake

My second trip to Sikkim this time was well restricted within the state capital, Gangtok. The priority task was to start rehabilitation activities in a damaged school identified during the last trip. It has been a part of our long term agenda of school safety, where through reconstruction of schools we are looking at Sikkim for:

• Strengthening of existing school building stock
• Introduce and integrating the concepts of safety and accessibility in school buildings
• Conducting dissemination programmes on safe construction to various user groups including the local government

To begin with, we started our work in Lumsey Junior School, which is within Gangtok city limits and has two classrooms damaged. The idea is not only to repair the damage and strengthen the school building, but also utilize this opportunity for hands-on training of masons on retrofitting activities. Me and Rehman (from SEEDS) started with interviews and discussions, and taking necessary information from the site including pictures and measurements.

Rapid visual surveys during my first visit and also by the SEEDS team members on their respective visits had helped us finalize Lumsey then. Lumsey seemed to be the best accessible school as we would want various groups such as engineers from various agencies and government departments, schools, and other groups to visit the school and interact. Currently, we are undergoing the process of finalising on a small team and also look forward to conduct our activities in the Junior High until the end of March 2012. Rakhi has joined us on SEEDS payrolls, and two masons from D.A. soon to join us.

Pictures of Lumsey school can be accessed here .

Lumsey Junior High School (Link to Picasa album)

Other than this, I also tried making a note on post earthquake activities undertaken by other agencies. It appeared from the news reports and discussions with peers that a clearer picture on larger funding from the Prime Minister’s and Chief Minister’s and other grants is still awaited by the administration and the civil society. It is interesting to see the debate at all levels on the mode of earthquake response the State should adopt in the future. Talks about meetings and conferences aiming for improvement in bye laws and infrastructure provisioning can be heard.

With a population of 6,00,000, Sikkim is a closely knit society. One and all are aware of the post earthquake consequences in the state, and have empathy for each other. House owners in towns such as Chungthang had to bear heavy losses. The rehabilitation style of an ex-gratia compensation by the government –as in this case, Rs.50,000 does not seem logical enough for a place like Sikkim.

It is unfortunate that one of the most prosperous States of India has no ready technical help available to its people in terms of safer building awareness and construction technology, and/or and/or counseling that would help them cope with this huge disruption in their lives and livelihoods- it being the need of the hour.

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Written: Chandra Bhakuni

Checks and Reviews: Pratul Ahuja, Shruti Nair, Smriti Saraswat

Engineering Lessons for Sikkim, India Earthquake (Magnitude-6.9)

I recently visited Sikkim, India after the 18th Sept. earthquake. The trip had a few-fold objectives, them being:

1. To understand the damage to buildings and infrastructure in the region

2. Visit the ‘School buildings’ and other institutional setups to understand the impact of this event

3. Observe the Disaster Response mechanism in place

Based on my field experiences and discussions with various people on this trip, I would like to make a few recommendations; as following:

1. Large engineering companies, universities in Gangtok, and individuals have studied Sikkim to a great extent, and their expertise should be utilized for safety and improvement of infrastructure.

2. The earthquake appears an opportunity for overall developmental improvements (access and amenities) in settlements that are urbanizing, such as worst hit Chungthang.

3. Traditional Wattle and Daub (Collq. Ekra) construction has performed well against the earthquake, and has low damage. This construction should be encouraged, and innovation in this area could yield comfortable and safer houses.

4. The damages in Chungthang have caused mental health issues to houseowners (especially who had made large investments) and counseling is an immediate need.

5. Damages in various school buildings have instilled fear/caution in children. Instead of listening to that fear, perhaps it is more prudent that opportunities are created for learning about earthquakes.

6. Sikkim is an opportunity, and can be shown as an example of collective governance, not only from the safety point of view but also development needs of the North East of Indian subcontinent.

For the detailed report refer www.quakeschool.org/files/110922SikkimEarthquake.html

By [With Acknowledgements]

Mr. Chandra Bhakuni, Structural Engineer, Quakeschool Consulting

[With sincere thanks to Manu and his SEEDS Delhi team, Mrs. Rinkoo Wadhera from local DOU unit, Mr. Prashant Pradhan and his team at Architects of Sikkim , Tshering (School Teacher), Sohel da (Faculty, Sikkim University), Col. Wadhera, Col. Vishal, and Quakeschool team and many others I could meet during this trip.]



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Earthquake Threat in the Indian Subcontinent- India Seismic Zone Map and its Field Implementation

It is well established that 60% of India’s population is estimated to be directly under earthquake threat. And, add some more to it, it will cover the whole South Asian subcontinent. One may like to reiterate that approximately 20% of the present world population lives in the subcontinent, and the region has a 10-15% decadal increase in population. The internet (wikipedia) link elaborately explains composition of these countries. See the image below for the increase in population of India over the last 60 years. The subsequent image shows comparative population increase in the subcontinent.

Figure showing population increase in India (Source: Google Worldbank indicators)

Figure showing population increase in the Indian Subcontinent (Source: Google Worldbank indicators)

This increase in population coupled with concern of quality of structures being built leading to increased risk in these areas is thwarted with a parallel argument; whether things are actually that bad in these growing economies, such as South Asia?

Well, it is easier to immerse oneself in numbers or debate, and therefore, become lost. Or, else one can take note of the red spots in the zoning map with hope. Actually, the inspiration to this post is also the India’s earthquake zoning map until someone unknown re-filled the riskiest zone (Zone V) with red. Image below shows that Zone V is more dangerous than Zone II. Red draws most attention, and zoning can be, for ease of implementation, reflected by the fact that India’s seismic map has four zones now. Note Zone I doesn’t exist anymore in the map. This simplification was done to assist implementation in the vast plural context of India after the unfortunate 2001 Gujarat earthquake. This map is a result of the hard and perseverant intelligent work by the Bureau of Indian Standards along with senior experts such as Dr. Arya, and many other engineers who previously worked and have been working on this overwhelming issue of reducing earthquake vulnerability, or for that matter vulnerability to any natural disasters in the country.

Picture above: Map of India showing earthquake zones of India established by the Indian Standards Institution (BIS)

Source: Google image search. Original source: Bureau of Indian Standards

Or, it can be argued that major factors - such as terrain, political, technological capacities, growth, to name some will continue to challenge the implementation of earthquake risk reduction activities in the subcontinent for the coming years. And in case of India, one can pick these red blocks and see clearly where urgent interventions are required - its North Eastern states, and states of Himachal Pradesh, Uttarakhand, and Bihar. Recent devastations in the subcontinent in Kashmir (2005) and Kutch (2001) are well known. These red spots are the riskiest spots, also known as ‘hot spots’. Perhaps, an independent but interconnected framework may help.

Amidst the so called tough ground realities, a stronger coordination is required to avert this ‘time bomb’. “We are sitting on a time bomb”, is what I recall during a meeting with a senior official at Shimla (Zone IV), a nice mellow hill town and state capital of Himanchal Pradesh; situated in a state that is tweaked red. It was 2004 then.

A Useful Tool

Link to Google’s and World bank’s tool for checking a country’s population of last 50 years.

Some thoughts on “SCHOOL SAFETY” in South Asian countries

Image source: Google Maps

Recently, we have been conducting some research for one of our clients on South Asian disaster history and its impacts on schools.

The interesting, unfortunate and perhaps already well publicized event is of the Kashmir earthquake in 2005 in which 17,000 School children were killed (out of a total life loss of some 80,000 reported) – the biggest known single event disaster to hit school buildings collectively. The number is exceptionally high because the earthquake struck during school hours. Other schools during other emergencies have been luckier – because it is the ‘important hours’ rather than ‘all hours’ that the children would spend in schools.

The next disaster events topping the list in the sub-continent are fire incidents, floods, war/terrorism, and malnutrition, only that these occur in a larger and slow intermittent period, measurable within a decade and amounting to a larger concerning number.

We will keep sharing more.

Quakeschool desk