The project volume this time is still quite large.

The tamping of the diversion dam is just one of them.

A drainage gate extending from the embankment along the slope of the slope is nearly 20 meters long.

After activation, these gateways will be in working state for a long time.

In the gateway, water flow will continue to flow and erode the gateway at all times.

It doesn't take long to get corroded and can't be used.

The soil washed down with the water flow is also a huge damage to the water truck at the end of the gateway.

Therefore, this gateway needs to be carefully built. It is not possible to just build straight construction. It also requires the use of erosion-resistant materials for paving.

And the materials that can withstand the years of erosion of water flow are only stones at present.

Even blue bricks can do it.

In this era, it is very difficult to build a large project.

Therefore, the construction projects must be of quality assurance. If you want to repair them, you must repair a hundred-year project and a thousand-year project.

You can’t play the game of GDP and political achievements over and over again.

Can't afford to play.

In order not to affect the flow rate of the water flow and to minimize the potential energy loss as much as possible, the gateway needs to be straight and flat.

The stone you choose cannot be used.

Stones with irregular appearance cannot be used, and flat stone slabs must be used.

This requires quarry and a quarry is built.

Why not use the stones picked up by the river to process the stone slabs?

Because, that kind of stone is too hard.

The scattered stones that are washed away by water in the mountain streams and rivers and are still left after countless years are really too hard.

Even if it is a bronze tool, the efficiency of processing such stones is still very touching.

If the stone slabs required for the gateway are processed with this kind of stone...

Ye Qing will go crazy.

Therefore, when making stone slabs this time, Ye Qing would rather mine the large bluestone on the mountain than use the rocks picked up by the river.

In comparison, quarrying is more efficient.

Whether mining or processing large bluestone, it is not very difficult.

There was also quarry in this era. In the absence of metal tools, there were two methods of quarrying.

One is the method of burning.

Use fire to heat the stone, then pour cold water, and the stone will crack when it expands and contracts.

Most of the resulting gravel is obtained in this method.

Another way is to rise.

First drill holes in the stone.

How to drill holes without metal tools?

Use a wooden stick or a bamboo tube drill!

It means dipping the wood or bamboo tube with wet water and dipped it in sand, and then pressing it on the stone and constantly rotating and rubbing it.

Water drops wear stones.

In this way, I used water to drill holes into the stone.

The time it takes is very exaggerated. If you don’t have dozens of days, don’t try to make a hole.

After drilling a hole with a certain depth, nail a dry wooden wedge and water it on the wooden wedge to let the wooden wedge wedge wedge wedge wedge.

The wooden wedge that absorbs water will expand and will spread the stones to crack.

Now that metal tools have to play the greatest advantage of metal tools, the method will be different.

First, carve a straight line with a chisel on the surface of the stone, and make a row of holes along the lines at the same distance.

This step is similar to the previous practice.

But with metal tools, it has become much easier to drill holes now.

Ye Qing directly replaced the woodworker's hand-drilled drill bit, which was an efficient hole-drawing tool.

It takes only half a day to cut a hole that is thick and deep.

The stonemasons like Pan were very satisfied with this efficiency, which was more than dozens or hundreds of times faster than before.

But Ye Qing was not very satisfied with this efficiency. Compared with modern high-tech gun hammer quarrying, this efficiency is outrageous.

But he had no choice, this was the ultimate he could do now.

The quarry is chosen at the foot of a nearby mountain.

Because the distance is not far, the houses to be accommodated do not need to be rebuilt, and stonemasons can still stay in the dam camp.

Now it is time for tribe members like Pan and Li, who are good at polishing stones to show their skills.

Ye Qing selected the tribesmen who were good at polishing stone tools from various tribes and formed a quarry team of about 200 people.

They are stonemasons.

Pan enthusiastically led the stonemasons to start quarrying in the quarry at the foot of the mountain.

Quarrying is no stranger to them.

But this quarrying was also very different from their previous quarrying.

In the past, they quarried to mine the raw jade stone buried inside the stone. There was no need to pay much attention to it, just dig it out.

This time it's different.

What I need this time is slate.

Therefore, quarry cannot be digging randomly like before.

They first cleaned up some floating soil, weeds, etc. on the mountain.

Many of the stones on the surface of the mountain have cracks. They inserted bronze wedges or crowbars into the cracks and pried them slowly with force to pry off large or small stones.

When these loose stones were collected, the following work became difficult.

The stones below are closely connected into one whole, and there are no natural cracks.

But this is not difficult for them.

He chiseled a straight line on the stone with a chisel and began to dig holes.

This time is a bit long.

For most of the day, after making a row of holes on the surface of the stone, two bent bronze nails were placed at each hole, and a bronze wedge was inserted between the bronze nails.

The rest is to beat the sledgehammer.

They swung the bronze hammer high and shouted the horn of Yohey, and several people smashed the hammer heavily on the bronze wedge at the same time.

After such constant smashing, the stone finally cracked along the row of holes.

This is quarry.

After the stone is harvested, it is transported to a relatively gentle place on one side for further processing.

Here, the sound of chiselings is heard, and irregular stones are processed into regular stone slabs.

Within a few days, the quarry began to produce slabs that meet the requirements.

At this time, the soil base layer of the gateway has been rammed straight, the high places on the slope have been flattened, and the low places have been filled with highs.

Li began his masonry work that was most interested in.

After the construction of the dam, his skills in building stones were improved again.

He cleverly combined the stones of different sizes and shapes from the rivers and mountain streams to build a neat dam wave-proof slope surface.

Looking at the neatly 500-meter-long stone slope, he felt a strong sense of pride and satisfaction.

Now building a drainage gate, although the technology requirements are higher, it is not difficult for him to do anything.

This time the raw materials are regular stone slabs. Although the sizes are different, the thickness is generally the same.

This is much less difficult.

The large and small stone slabs were neatly built under his clever combination.

The stone slabs are tightly combined with each other, as if they are naturally generated.
Chapter completed!