Earthquakes In Vietnam?

12 earthquakes in two days jolt Central Highlands Province

After the first tremor occurred at Kon Plong at around 2pm on Tuesday with a magnitude of 4.7, 11 more tremors were recorded with scales ranging from 2.5 to 2.9 magnitude.

Although the 4.7-magnitude earthquake was the strongest recorded in the area in more than 100 years, the level of disaster risk is 0, which means the tremors are not likely to cause loss of life, injury, or destroy or damage assets (VIETNAM NEWS)

- @OceanBeach92107

@Sobie I'm a civil engineer. On my first Vietnam project, I questioned the structural design consultant about TCVN seismic building codes. No answer, only a sideways smirk. On every new design project since I'll raise the question, but it goes no further. I only want the question to be included in the design meeting minutes. I'm not an alarmist or the sky is falling. But it's always in the back of my mind.

@Sobie I'm a civil engineer. On my first Vietnam project, I questioned the structural design consultant about TCVN seismic building codes. No answer, only a sideways smirk. On every new design project since I'll raise the question, but it goes no further. I only want the question to be included in the design meeting minutes. I'm not an alarmist or the sky is falling. But it's always in the back of my mind.

- @River Frogs

@River Frogs

Greetings River Frogs,

MAc here.

Well we've done our first day at our new construction site, of our home. Plans show and tell etc.,

Today was the first day of piers/piles installation.  It is done with hydraulic press, not driven.

Each pile is 6 meter. 3 pile equals one pier.

After the beginning install, the site super of the contractor asked  my wife (She speak Tieng Viet, I do not)

if we would do 4 piers, into this soil.  I was taken aback by this after she explained to me, the contractor said it

'would be better' but using USD as a calc. about 2,000 USD more. 

I balked at this as an issue. As the completed 18 meter pier do not go to bedrock, what was the point?

he stated 'it would be better'

Of course my wife was flummoxed. I was not. I'd been on too many jobs before, but not in Viet Nam.

This soil tell me here in the Delta, that no matter what you do, if you cannot go to bedrock, it is the work of the piles and the foundations to float, and remain in place, concrete, rebar, constructed beams. across, etc., moisture draw down.

The engineering is the same plan as the home built two lots over, same soil. Same dimensions, etc, height, width, depth of structure, same construction. Piers on that unit are 3 piles of 18 meters each. Proper engineering of pile centers.

I consulted with the inspector who was on site from Tien Giang, Province. He concurred that the 18 meter pile is adequate.

I thought this might interest you.

MAc

Reports (unconfirmed) today from a friend in VN Highlands of a 3.2 quake, at around 12:00 noon.