Chapter 70 (1/2)

In the garden, there are also several security guards leading wolf dogs to patrol around. This place is more strict than the prison. I'm afraid even a fly will not fly in easily.

Four people went through two security doors before they finally entered the building. A middle-aged man with the appearance of a housekeeper led into a splendid living room with golden walls. After a while, the servant brought tea, several people have a word without a chat.

The guide said, ”my master is busy. Please wait a moment.”

When I entered the living room, it was 9:10 in the morning. Several people waited for a full hour, until 10:10, Yang Tiansheng did not come out. Liu Ziguang's face gradually showed anger, and even Liu Ling's eyebrows were locked up, and her expression was very unhappy.

Zhang Jun's heart is also very unhappy, this Yang is born a good big frame! He glanced in the living room and finally landed on a pillar at the side of the hall.

On the left and right sides of the hall, there are three huge red lacquer pillars. The pillars are hollowed out and designed into a layer of lattice for display of articles, which are filled with precious items, such as porcelain, bronze, jade, etc.

Through perspective, Zhang Jun found that the four pillars were made of wood, very strong. However, he found that one of the pillars was shaking at a certain frequency, which, though small, could not hide from his eyes.

High school physics textbooks have said that objects have their own natural frequencies. When the frequency of driving force is the same as the natural frequency of forced vibration objects, the amplitude of forced vibration objects will reach the maximum value.

At the same time, he also heard a clear roar from outside, and knew that something must be shaking the earth nearby and affecting the pillar.

Thinking for a moment, he had a worry in his mind, and suddenly said to Liu Ziguang, ”uncle Liu, let's go out for a walk. The hall is very stuffy.”

Liu Ziguang was already bored and said, ”OK, let's go for a walk.”

The steward did not stop him, but took the initiative to show them the garden. A few people chatted while walking. Before long, Zhang Jun found that there were workers working on the construction not far from the front. A worker supports the air rammer to hit the ground and makes a loud noise, which can be heard from a distance.

Air tamping is a kind of gasoline burning machine, which can be used to tamp the foundation, so as to make the buildings on the ground more solid, and its efficiency is much higher than that of soil ramming. It was widely used more than ten years ago.

He asked the middle-aged man who looked like a housekeeper, ”is the house under construction here?”

The man nodded: ”yes, the master wants to build a pavilion here. It started yesterday.”

Zhang Jun nodded, then strode to the worker and handed a cigarette to him. The worker knew that the people living in the yard were not simple. He stopped working, took the cigarette with both hands respectfully and said thanks.

He said with a smile: ”master, busy?”

The worker said, ”yes.”

He said: ”I have done this kind of work before. Just now I saw your hand itching when I saw you tamping, so I wanted to come and try some hands.”

A listen to Zhang Jun or ”peer”, workers came to interest, smile: ”since you have done, of course you can.” With that, he gave the gasoline rammer to Zhang Jun.

Zhang Jun knew this kind of machine very well. He started it very quickly. Then he felt that when his arms were shaken, a man high iron guy would jump up and produce a huge impact.

He is a fierce man who has developed a strong sense of strength. He is very skillful in controlling the power. Naturally, he will not be in a hurry. Instead, he will quickly adjust the direction and strength to make the pile driver land steadily and make a deep mark on the ground.

Seeing that Zhang Jun was skilled, the worker couldn't help but praise: ”your skill is better than mine. It's very powerful.”

Zhang Jun ”ha ha” a smile: ”master rest for a while, let me play for a while.”

When he agreed to smoke, he laughed.

Every time he rammed several times, he would adjust the accelerator of the rammer to make the tamping frequency close to the natural frequency of the wooden column. About a dozen times later, the two frequencies fit perfectly.

In the distance, several people were baffled by Zhang Jun's practice. Liu Ling couldn't help saying, ”what is he doing? Do you want to come and tamp it

Liu Ziguang also couldn't feel his head and said, ”maybe his hands are too busy, so he used to play.”

Professor Guo didn't think so. He thought for a while and said with a smile, ”he must not be playing, but he has thought of some ghost idea. He will know in a moment.”

As the rammer bombarded the ground again and again, in the hall more than 300 meters away, the pillar began to vibrate, and the column body twisted more and more. Finally, the whole hall trembled slightly.

”Bang Qi! Bang Qi

Zhang Jun held the rammer with a sneer on his face and his eyes fell on the hall.

About seven or eight minutes later, the wooden pillar in the hall finally couldn't bear the violent shaking. ”Click” broke into two pieces, and the countless precious articles and games on it fell to the ground and broke into pieces.