|->Chapter 113 Lion Ball Ridge Tunnel? It was slowly getting dark, and every house on Nuan Nuan Street lit kerosene lamps one after another.

In the distance, the construction area of the infrastructure corps is brightly lit. The high-voltage current emitted by the 50kW generator set is transmitted to each construction site in the heating area through the line, and then converted into 220V low-voltage electricity and transmitted to all corners of the construction site.

Tonight, the construction area at the south exit of the Shiqiuling Highway Tunnel is particularly bright. People are busy with nervousness and excitement, and in the shed outside the tunnel, gongs, drums and firecrackers have already been prepared, waiting for the exciting good news to come from the tunnel.

The design length of the Shiqiu Ridge Highway Tunnel is 200 meters, the width is 10 meters, and the height is 5 meters. Outside the north entrance of the tunnel is Keelung, and the south entrance of the tunnel is only about 400 meters away from the Nuannuan Highway Bridge under construction.

Panda led the tunnel construction team to excavate from the north and south sides of the Lion Ball Ridge at the same time by manually drilling holes and blasting and tunneling in full section with an air-legged rock drill. The two teams are advancing at the same time at a rate of about four meters per day, and they are expected to meet in victory tonight. The breakthrough of the Shiqiuling Tunnel is a great event, and Bai Baoxiang is also a little excited. After he hastily finished dinner, he took Lin Anke and his own guards to the infrastructure construction group to meet Lin Dejia, and then came to the construction site of the south entrance of the highway tunnel together.

The arc lamp illuminates the construction area of the south entrance of the highway tunnel as bright as day.

On one side of the work area is a mountain of rubble. A steel crusher stands in front of the mountain of rubble, and the movable jaws creak open and close, spitting out a large pile of rubble, driven by a steam engine.

On the other side of the work area is an open field, where two steam tractors for slag removal are parked, and many tools for slag removal are stacked. The ventilator rumbled into the tunnel.

On the edge of the open space is a row of sheds, with duty rooms, rest rooms, warehouses, canteens, and a pyrotechnics room dedicated to storing explosives.

The leader of the second detachment, Quan Lang, and his soldiers could not sit still in the rest room, and they gathered outside the entrance of the cave in groups of three or five, looking into the tunnel from time to time, looking forward to the order to work.

The Nankou construction team is divided into two teams, the first team is responsible for drilling and excavation, and the second team is responsible for slag removal and other service work.

Quan Lang is Japanese, formerly known as Ichiro Inu. When he was excavating Badouzi Daotong, the excavation group he led ranked first in the tunneling depth, and the excavation team was rated as a collective second-class merit, and he also personally got a third-class merit. Lin Dejia personally nominated him as a probationary member of the Ba'ath Party and renamed him Quan Lang

"Stand upright!"

Quan Lang saw Bai Baoxiang and Lin Dejia coming, and hurriedly ran to report.

"You're the right Lang, well done!"

Received the praise of the prisoners, and the rights and interests of Lang were full of light, "I will continue to work hard and dedicate all my strength to the Chinese revolution." ”

"A flower blooming alone is not spring, you have to lead everyone to the revolution to the end!" Taking the hard hat sent by the soldier, Bai Baoxiang put it on his head, "What about the Pan brigade?" ”

"They're all in there." Quan Lang replied respectfully, while holding hands, motioning for the soldier to send a few pairs of thick coarse cloth masks.

Two security officers stood guard at the entrance to the tunnel, which was filled with dust.

"Where's the register? The four of us went in and had a look. Lin Dejia looked through the records and signed the registration book casually.

The register is a security measure. Before the cannon is fired, the safety officer needs to count the number of people, and the number of people out of the hole is the same as the number of people entering the hole, before the cannon is allowed.

Putting on a thick coarse cloth mask and taking the necessary protective measures, Bai Baoxiang and Lin Dejia walked to the depths of the tunnel.

The concrete sprayed on the tunnel arch has long since solidified, and the wires have been pulled along both sides of the cave wall, and about every fifteen meters or so, there are arc lampposts erected on each wall of the tunnel.

Because of the dust that has not dispersed in the tunnel, the light emitted by the arc lamp looks a little sallow.

In order to prevent the occurrence of safety accidents such as the collapse of the top floor, the construction team sprayed a layer of concrete as soon as the excavation face was cleaned. Then use steel bars to match with bitter bamboo tendons to weave out a large pipe shed, and finally spray a thick layer of concrete.

The use of bitter bamboo tendons instead of steel bars to reinforce the protection of the cavern seems to be a bit child's play, but it is actually very scientific. The Japanese did a lot of bamboo tendon concrete tests during World War II, and believed that bitter bamboo was the most suitable bamboo tendon material, and it happened that bitter bamboo grows everywhere on Keelung Mountain.

The Planning Commission also conducted special experiments. The bitter bamboo is carefully divided, then boiled in lime water, soaked in 3% stone sulfur compounds, and finally treated with wood tar to become bamboo tendons. After calculation, the average tensile strength of the ten bitter bamboo bars is 226.5MPa, and the average tensile strength of the ten steel bars is 235MPa, which is not much worse than the steel bars.

Bai Baoxiang, Lin Dejia and his party walked more than 60 meters inside, and the second-layer concrete on the cave wall here had not yet had time to be sprayed.

A lot of scaffolding has been erected in this tunnel, and more than 100 workers of the Nuan Nuan construction engineering team, under the guidance of a technician, are neatly weaving steel and bamboo reinforcement support nets. They wore hard hats, large masks on their faces, labor clothes, labor gloves on their hands, and liberation shoes on their feet, and their whole bodies were tightly protected.

This huge steel bar bamboo reinforcement support net, the circumferential steel bars are five meters apart, the diameter of 16mm rebar, the longitudinal steel bar is five 12mm diameter rebar, and the middle string is only 10cm on the parallel bamboo tendon skeleton, which is connected by iron wire braiding.

Standing on the scaffolding, Hu Laosan picked up an iron wire and tightly wound a circumferential bitter bamboo tendon with a longitudinal steel bar. Changing positions, Hu Laosan took out another wire and knocked it on the steel bar.

"Such a good steel, the court is willing to bury it in the walls of the cave!" Hu Laosan used to be a blacksmith, and he felt very sorry.

"Yes! Listening to the Qian technician, this good steel was still bought from the Yingka Yiren. Zhao Qinghua, the team leader, knows better, he and the Qian technician in charge of them are both from Dinghai, and they also have contacts with each other after work.

Hu Laosan was a little stunned, "The imperial court spent a lot of money to open this cave!" ”

"When I was in the party class, the adults said that only with big input can there be big output." Zhao Qinghua said mysteriously, "But I heard that a large steel mill is under construction, and when the steel mill is completed, our Daming steel will produce more steel than Tartar has produced in ten years." ”

"It's true?!" The workers were amazed.

Technician Qian Haiming stood on the high place of the upper scaffolding, checking the quality of strapping node by node. Bamboo tendon bundling is generally difficult to fix, so Qian Haiming checked it more carefully and carefully.

Hearing that there was some noise below, he squatted down and stretched out his hand, and gently patted Hu Laosan's hard hat, "Hurry up and work, it's about to explode!" ”

Qian Haiming is a native of Dinghai, with a bright head and a rough understanding of literature and ink, and he is a backbone talent cultivated by the infrastructure construction corps itself.

Sensing that someone was coming in outside, Qian Haiming looked up and looked at it, this is not Chairman Bai and Mr. Lin! His eyes lit up suddenly, and he climbed down the scaffolding with two strokes.

Seeing Bai Baoxiang and Lin Dejia waving their hands to him again and again, Qian Haiming saluted and watched Bai Baoxiang and them walk towards the depths of the tunnel, and then breathed a sigh of relief.

"Technician Qian, who is the adult at the front? It seems to be even more powerful than Mr. Lin! ”

Facing the curiosity of Zhao Qinghua and others, Qian Haiming said in awe, "This is the leader of the Baath Party, the Lord of the Quan Jian Guo!" ”

"Knock, knock, knock, knock......"

On the tunnel face (operation face), more than a dozen engineering soldiers wearing thick labor clothes and hard hats are operating mountain drills and rock drills and opening cannon holes.

The machine roared deafeningly, the rock was constantly shattered, and the holes with a depth of 2.1 meters were chiseled out one after another.

More than ten meters away from the face of the palm, Yan Yuxian was operating a laptop.

The locator and locator controller placed on the cave wall continuously transmit data to the computer. With Yan Yuxian's dot painting, the location of the center of the tunnel, the outline of the tunnel excavation and the location of the blasting point are constantly changing on the screen.

Yan Yuxian is Pan Da's assistant, a native of Fuyang, Anhui. He studied architecture and is particularly interested in mechanical and automation control.

Panda was beside Yan Yuxian, and when he saw Bai Baoxiang and Lin Dejia coming, he hurriedly ran over and saluted, "Chairman Bai, Mr. Lin, you are here!" ”

"How? Is everything going well? ”。 Bai Baoxiang replied casually and asked about the situation seriously.

"The progress is good, these days we use the automatic positioning system, omnidirectional instrument test data, according to computer analysis, in the middle of the gap, there is only the last two meters three. Now they have also stopped working on the north entrance face, just waiting for the last explosion on our side. ”

"The last blast!" Bai Baoxiang clenched his fists and shook it, "Okay, I'll watch you smash these two meters three today!" ”

"Thank you for your care!" "We've drilled 55 holes, and in five minutes, the last two holes left in the province will be completed." ”

He looked at his watch, "It's 6:21, and you can reload the explosives at 6:30." ”

Soon, the roar of the machine was much quieter, and only one soldier was still holding the wind drill with both hands, burying his head in hard work. After a while, the last drill also stopped.

The technician immediately stepped forward and measured the depth of this last borehole with a ruler, "The depth is 210 cm, passable!" ”

There was a burst of applause on the face.

"Quick! Hurry up and let the second detachment bring in the pyrotechnics! Panda waved his hand impatiently.

The Lion Ball Ridge Highway Tunnel uses hydraulic blasting technology.

First put a 20cm sealed bamboo tube in the deepest part of the blast hole, then put a detonator ~ tube and explosives, then put a 40cm sealed bamboo tube, and finally tightly seal the blast hole with cannon mud.

These sealed bamboo tubes are full of water, and the cannon mud is also made of soil, sand, and water in a certain proportion.

Because there is water in the blast hole, the strike wave propagating in the water is incompressible to the water, and the explosion energy is transmitted to the surrounding rock around the blast hole through the water without loss, and the stress wave without energy loss is very conducive to rock crushing, in addition, it will also produce the "water wedge" effect, which is more conducive to rock crushing, and the water mist effect is also conducive to reducing the pollution of dust to the environment.

There were a total of fifty-seven blasting points, and Panda personally went into battle, and he took five pyrotechnic technicians to fill the cannon holes one by one, lay the network, and pull a wire out of the hole.

"Toot toot toot~~" The attendant blew a sharp whistle.

Hearing the whistle, the leaders of the various groups in the tunnel immediately began to shout, "Quick! Everyone retreats outside in order, and the mountain is about to open! ”

At the entrance of the cave, the security officer counted the number of people one by one, and the leaders of each team signed the registration book separately and brought the team to safety.

Easily damaged items such as arc lamp posts, ventilation ducts, locators, and locator controllers in the cave have also been brought out, and mechanical equipment such as ventilators and stone crushers outside the cave have long been shut down.

"Captain, all the personnel are out of the tunnel, and now they can detonate!"

"Captain, the north entrance of the tunnel has been notified, and Director Lin has also rushed there, they are waiting for our explosion!"

Director Lin is Lin Youde, a member of the Executive Committee, the secretary of the Ministry of Industry, and the director of the Planning Commission.

Everything is ready, just wait for the last press. Outside the south exit, the people were all quiet.

Panda looked calm, "Chairman Bai, you can press the detonator!" ”

In the face of Panda's kind invitation, Bai Baoxiang simply refused, "This is your right!" It's your honor! This is your pride and pride! ”

Panda simply gave up this right. He searched around the crowd, and his eyes lit up, "Captain Quan, your detachment has worked hard, and you will press the last shot today." ”

"Hey!"

Quan Lang ran over excitedly and pressed the red button very obediently.

"Boom, boom, boom, boom......"

The explosions rang out one after another, and the dust billowed in the tunnel, and the crackling of rubble kept jumping out like bullets.

Before the explosion completely stopped, the hand table carried by Bai Baoxiang's guards rang.

"Chairman Bai, the tunnel has been opened!" Lin Youde's excited voice sounded in the handstand, "At the north entrance of the tunnel, there is smoke and dust everywhere, and the gravel jumps straight out. ”

"Wow~~~" The people immediately cheered, and the celebratory gongs and drums and earth-shattering firecrackers all rang out.