Civil Engineering Internship Report Fan Wen

I. INTRODUCTION - The era of Mao Yisheng is no longer our generation. Most of the initial understanding of the bridge comes from the text of Guo Xiaoli. I don't know if there are still many people who can still get the strange words from the memory like me. “The bridge is not only sturdy, but also beautiful. There are stone columns on both sides of the bridge. The panels are engraved with beautiful patterns: some engraved with two intertwined dragons, the front claws are against each other, and each looks back; Inscribed with the double dragon play beads. All the dragons seem to be swimming, it is like living." Yes, Zhaozhou Bridge, the crystallization of the wisdom of the ancient Chinese working people, synonymous with Chinese bridge engineering technology.

Similarly, there is another text, which is about the representative figure in the history of Chinese bridge engineering, Mao Yisheng's childhood story. The story is probably a story, there is a need for interpretation and artistic rendering, but between the lines, it is the bitterness of the development of modern Chinese engineering and the bitterness of the older generation of engineers.

Two texts, let us realize that the existence of the bridge is so necessary, and for a long time we have taken this as a matter of course, squandering the luxury of the predecessors. Now, before this compelling Zhuangwei, I have to turn my attention to the bridge again, a familiar and unfamiliar term.

The bridge is not only a functional structure, but also a three-dimensional plastic art project. It is also a landscape project with the characteristics of the times. The bridge has a magnificent glamour.

This re-examination made me unable to help. The bridge, familiar with the name, actually suffered so many changes, but also carried so many stale...

From the Qiantang River Bridge to the Hangzhou Bay Bridge, the technical perfection and the various forms of expression tend to be diverse. These amazing architectural miracles are all like us suggesting that the era of Mao Yisheng is no longer.

Second, cognitive internship records

At 8:00 am on the first day, we gathered in front of the cinema at the railway campus and took a group car to visit the bridge over the Liuyang River. Our first stop is the Guitang River Bridge across the Guitang River and Liuyang River.

Interestingly, before I searched the Internet for the term "Guitang River Bridge", I only got the "news" of this XX year. The Guitang River Bridge was opened to traffic in October 1995. The bridge is 52 meters long and 6 meters wide. Because the original design of the bridge deck elevation can not meet the flood discharge requirements, coupled with flood erosion and increasing traffic volume over the years, the bridge deck and railings have been damaged in many places. Once the water level rises, the entire bridge will be flooded, resulting in traffic disruption. Therefore, the relevant departments decided to transform them. According to the relevant person in charge of the Municipal Highway Bureau, the renovation of the Guitang River Bridge will be 115.78 meters long and 12.6 meters wide, which will not only facilitate residents' travel, but also greatly enhance the flood discharge capacity.

The Guitang River Bridge we saw is the new site, a typical underpass arch bridge, in which the approach bridge is a prestressed three-span continuous box girder with a total length of 170 meters, a main bridge length of 140 meters and an arch length of 75.8 meters. The bridge is 32 meters wide. After going west, it is the Liuyang River Bridge. The Liuyang River Bridge is 281 meters long and the bridge deck is 29 meters wide. Under the leadership of the teacher, we first visited the piers of the approach bridge and the main bridge, analyzed the composition of the interior of the bridge deck, and recognized the characteristics of the arch bridge.

Then we drove to the Hongshan Bridge. Next to the Hongshan Bridge, there is an old Hongshan stone arch bridge in Sui and Tang Dynasties. The teacher felt that the cost of this concrete arch bridge was a fraction in front of the Hongshan Bridge in steel structure.

Hongshan Bridge ranks first in the world in the span of the same type of bridge and the height of the inclined tower. The main bridge structure is a cable-stayed bridge with no back cable leaning tower. The main span is 206 meters. There is no bridge pier under the bridge. The tower body and the bridge deck are completely inclined by 13 pairs of harp-type parallel wires. The cable-stayed bridge tower adopts a thin-walled hollow reinforced concrete structure with equal section, which is consolidated by the tower base and the foundation, and the main beam is also a steel box beam.

Walking on the bridge, we accidentally discovered that there was a score on both sides of the barrier in the bridge. I went to the end alone and found the treble clef and the c. I don't know what it means.

On September 15th, 2019, everyone in 713 felt that the weather turned cold in the early days, and they added clothing...

With the hustle and bustle of Xiangjiang, we sailed to the second ring... Looking at the surrounding buildings, everyone’s topic is the price of Changsha. Finally the car stopped under the Xiangjiang Second Bridge.

The approach bridge is very long, and in such a morning fog I can't see the main bridge on the approach bridge.

The cow dung on the ground is still fresh. Vaguely can see the shore of the Xiangjiang River.

Xiangjiang Second Bridge. Not old, not new. There is no sense of vicissitudes, and it is equally difficult to give a modern sense. Very modest existence.

The second bridge is 3,616 meters long and 25 meters wide and is divided into 4 lanes. It was officially opened to traffic on January 30, 1991.

The bridge has a total of 159 bridge piers, and thousands of tons of vessels can be smoothly navigated under the bridge. The main bridge spanning the Xiangjiang River consists of a double tower single cable plane prestressed concrete cable-stayed bridge and two sides are continuous beams, with a total length of 1025.26m. The total length of the cross-strait approach bridge is 1336.68m. The width of the main bridge is 25m, and the main beam of the cable-stayed bridge is a three-chamber closed box girder. The whole section is used for one-time overall suspension construction. The pylon adopts inverted y-type single-column structure. The upper anchor section of the tower column is h-shaped section with a height of 31.3m. The lower tower leg has a rectangular section with a height of 22.42m. The two legs and the double-walled tower pier are rigidly connected through the beam. The pier foundation is made of 14 φ2m bored piles and is constructed with double-walled steel cofferdams.

Its life span is one hundred years.

Go back to the car early. This time I really drove out the Second Ring Road. Along the Xiangjiang River, we came to the Sanchaji Bridge. Asia's first, the world's second self-anchored suspension bridge, it is not extraordinary, but this extraordinary looks so ordinary in front of its ordinary.

The concrete of the approach bridge is 845 meters long, the main span is 328 meters long, the main bridge is 732 meters long, and the bridge width is 29 meters.

The main bridge was designed by Central South University. Is it the pride of Zhongnanqiao Tunnel people worthy of conceit?

The teacher paused and smiled and said that the price of 70-year high-strength steel was about 10,000 yuan a ton. Everyone figured out that 11,000 tons, synthesizing 5 yuan a pound, pork is more expensive than it is when it is not rising. Looking at the bridge in front of you, just picking a pig is probably a farm car sent to the slaughterhouse. We can’t help but laugh.

Third, the internship summary

Open my engineering introduction textbook and find that there are only such notes in the chapter on bridge engineering.

Overall Planning → Engineering Feasibility Study → Development and Reform Commission Approval → Design Bidding → Design → Construction Bidding → Start-up → Completion → Load Completion Test → Delivery Use → Engineering Maintenance.

This is an industry process that is more standard but not usual, but I am sad.

This is the fate of a bridge. Reincarnation, but not reincarnation.

I thought of the old bridge next to the Hongshan Bridge. I thought about the renovation of the Guitang River Bridge. I thought of Asia's first and the world's second self-anchored suspension bridge, which is cheaper than pork.

A good bridge is a work of art. And no bridge can flow to the world, at least the current construction technology, material technology is not allowed. Even if there is such a possibility, it will eventually fall behind the times and affect the development of the environment. After all, it will be abandoned for the times. There is only one Zhaozhou Bridge, and there is only one bridge in Nanjing Yangtze River. Their existence is real. Who can witness this truth after a hundred years?

The artwork of the bridge is destined to be short-lived.