Today's smart construction,

is related to this:

On construction sites, pile foundation work is called 'driving piles.'

Driving piles is more complex than driving kids,

There is a type of pile that is indeed prefabricated and driven into the soil,

and another type of pile,

where a hole is dug in the ground:

a rebar cage is placed,

and concrete is poured.

For example, to drive a 13-meter-long pile,

concrete must be poured to 13.5 meters,

and then the extra 0.5 meters is chiseled off.

Isn't that wasteful,

or is it just idle people looking for something to do?

Actually,

the main reason is

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During concrete pouring,

aggregate settles,

and the upper 0.5 meters of concrete has very little aggregate,

turning into 'mortar.'

The process of removing this 'mortar' is called pile head breaking.

As for the method,

find a few strong men,

with sledgehammers,

and smash away.

In this process,

a pile-breaking team is needed.

Priced per piece,

it costs a lot of money.

Some use a cutting machine to cut a ring first,

breaking it neatly:

Some smash with sledgehammers,

breaking the rebar

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Some follow closely,

loaded by excavators,

and taken away with the earth:

Some break slowly,

and also need tower cranes to lift away,

delaying the schedule,

and costing no less.

With universal education,

there are fewer and fewer strong men,

and one person saw the secret in this.

Here's what he did:

Step 1:

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Step 2:

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Step 3:

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Step 4:

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Step 5,

or an excavator pushes it down:

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or a tower crane lifts it away:

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This method has no noise,

so residents don't complain:

No dust,

so environmental inspectors don't cause trouble:

Convenient and fast,

the schedule is advanced,

and more importantly: it saves money!