Gravel, gravel and more gravel

The builders of the 30's would be speechless.  In 1939 the house was built on piles over bare ground. Post earthquake we are engineered for more shakes- my land is TC3 with increased flooding vulnerability. A decent amount of liquefaction bubbled up in February 2011 and sat under the house till the 2014 EQC "repair" - removal method, students with trowels and buckets to scrape. I crawled under with the inspectors in 2010 for a look but, even with the removal of two small truck loads in 2014, I would not have ventured back. Too claustrophobic.
Back to 2019 and the 500 mm dig out is filled with gravel. Another layer is added above ground and compacted.