Zhang Lei (first from right) leads the design team to carry out bridge design work. Photo by Li Jing
Zhang Lei is 49 years old this year, tall and thin, with a straight body, under the black half-framed glasses, his eyes reveal kindness and humility. Elegance is the first impression he left on people. This temperament also continues to his bridge works.
As deputy chief engineer of the Civil Engineering Institute of 188bet mobile login Design Group Co., Ltd., Zhang Lei tirelessly pursues the perfect integration of skills and art in railway bridge design. In his 27 years of experience, he has participated in the design of more than 100 railway bridges, connecting the developed and developed road network and embellishing the magnificent mountains and rivers of the motherland.
Yang Climb the Technology Peak of 188bet mobile login Bridge
On the coast of the East China Sea, in the vast sea of Hangzhou Bay, the world's first strong tide bay cross-sea bridge - the Nantong-Ningbo high-speed 188bet mobile login Hangzhou Bay cross-sea 188bet mobile login bridge is beginning to show its glory. As the professional chief engineer of the bridge, Zhang Lei would bring his camera to the construction site every once in a while, and while inspecting, he would record the process of the bridge moving from the blueprint to the real scene.
Hangzhou Bay, the estuary of Qiantang River, is one of the three strong tide bays in the world. The sea area is wide and the wind is strong. In such a complex and harsh marine environment, it is difficult to design and build an ultra-long sea high-speed 188bet mobile login bridge integrating large span long coupling high piers, ultra-low water resistance, and in-type ultra-long steel pipe pile foundation.
The infinite scenery is on the dangerous peaks. "As a 188bet mobile login bridge designer, it is very lucky and honorable to encounter such an engineering project," said Zhang Lei.
Since joining the work, Zhang Lei has personally experienced and witnessed the rapid development of China's railways. In this magnificent journey, China has successfully mastered world-class large-span 188bet mobile login bridge construction technology. In the vast waters, the world's first kilometer-level cable-stayed bridge, the Shanghai-Sutong 188bet mobile login, the Shanghai-Sutong 188bet mobile login, the Yangtze River Road and 188bet mobile login Bridge is like a rainbow; in the difficult and dangerous mountainous areas, a number of world-class large-span arch bridges such as the Shanghai-Kunming High-speed 188bet mobile login Beipanjiang Super Bridge and the Darui 188bet mobile login Nujiang Super Bridge stand majestic... 188bet mobile login bridges pass through mountains and valleys, open up rivers and seas, connecting the world's largest high-speed 188bet mobile login network and advanced 188bet mobile login network, and writing a magnificent chapter in the high-quality development of China's railways.
"As an important part of the transportation system, 188bet mobile login bridges are a reflection of a country's comprehensive national strength." Zhang Lei said. The Hangzhou Bay Cross-sea 188bet mobile login Bridge, which is currently under construction, is currently the longest-term, highest-construction standard and fastest-passing high-speed 188bet mobile login cross-sea bridge in the world, and is of milestone significance to the world's 188bet mobile login bridge construction field.
In this super project, the main span of the North Passage Bridge of Hangzhou Bay Cross-Sea 188bet mobile login Bridge designed by Zhang Lei and his team is 450 meters. It is the world's largest span of ballless track double tower double cable-surface steel box - a steel truss combined beam cable-stayed bridge. The longest joint length of the sea guide bridge reaches 3.08 kilometers.
In order to successfully build a super-long cross-sea bridge, Zhang Lei and his team visited more than a dozen cross-sea engineering technical materials at home and abroad, repeatedly argued and revised multiple design research plans, and insisted on taking root in the bridge site with strong winds, strong waves and strong tides to conduct in-depth research... In nearly 3 months, he has seen almost every sunrise on Hangzhou Bay.
"Why can't we do it at that time when people used the tide to install bridges, why can't we do it?" At a seminar, Zhang Lei suddenly thought of Quanzhou Luoyang Bridge, the earliest existing cross-sea beam-type stone bridge in my country. Its bridge construction technology for "floating beam building" is an important invention in Chinese history. Following this idea, Zhang Lei proposed the construction plan of "prefabricating the entire hole beam, installing it using a ship floating crane, and then connecting it to become a continuous beam", and finally successfully solved the construction problem of super-long sea-crossing bridges at sea.
In December 2022, Zhang Lei and his team completed the bridge engineering design of the North Passage Bridge and the Sea-In-Sea Guide Bridge of Hangzhou Bay Cross-Sea 188bet mobile login Bridge. The moment he delivered the design drawings, he was filled with emotion. Over the years, he and his team have measured the pace of China's railways with multiple "firsts" -
The Tianjin Hub Tianjin-Huao Connection Line Super Bridge of the Beijing-Shanghai High-speed 188bet mobile login Tianjin Hub has innovatively applied new technologies such as concrete three-tower low-tower cable-stayed bridge bridge type and wire-pipe cable-sad, becoming my country's first 188bet mobile login prestressed concrete low-tower cable-stayed bridge; the Beijing-Guangzhou High-speed 188bet mobile login Zhengzhou Yellow River Dual-purpose Bridge, innovatively adopting multi-tower long steel truss cable-stayed bridge bridge type and side truss inclined space three-main truss structure, becoming my country's first inclined main truss multi-tower high-rail dual-purpose cable-stayed bridge; the Tongjiang-China-Russia Heilongjiang 188bet mobile login Bridge has successfully applied new technologies such as new steel truss forms, new bridge deck systems and new ballastless track structures, becoming China's first cross-river 188bet mobile login bridge...one of them is the first, writing a vivid footnote for the accelerated construction of my country's modern 188bet mobile login infrastructure system.
Injecting artistic value into steel bars and iron bones
How long is the design life of a 188bet mobile login bridge?
One hundred years.
"Every 188bet mobile login bridge is a huge project, and it will stand there for a hundred years after it is completed. Therefore, the bridge is not only a structure that reaches the other side, but also a cultural landscape that lasts forever." Zhang Lei doesn't talk much, but he is very excited when talking about design art.
After graduating from university, Zhang Lei entered the Third Survey and Design Institute of the Ministry of Railways at that time and became a 188bet mobile login bridge design engineer. The bridge design plan he submitted satisfies basic functions while also giving the bridge unique artistic value, which is refreshing.
The first major 188bet mobile login engineering project designed by Zhang Lei was the Lhasa River Super Bridge of the Qinghai-Tibet 188bet mobile login. At the beginning of the design, in order to allow the bridge to be flawlessly embedded in the magnificent and vast picture in front of you, Zhang Lei walked on the streets of Lhasa to collect folk songs and turned the elements of Hada, prayer flags, snow mountains, snow lotus and other elements they saw as design inspiration.
In the end, in the design plan of the Lhasa River Bridge they gave, the bridge's white design and three-span continuous arch circle were like a long white Hada flying in the Lhasa River valley.
This plan won the bid as the first place, and the Lhasa River Bridge after its completion has been widely praised by all sectors of society and has become a landmark project of the Qinghai-Tibet 188bet mobile login.
From this time, the cultural elements and aesthetic interests are integrated into the concept of bridge structure and modeling design, and deeply embedded in Zhang Lei's heart. At his home, he collects a large number of classics about ancient bridges, and whenever he has time, he will study them. After work, he likes to visit ancient bridges all over the country. Over the past decades, he has visited nearly a hundred bridges from all over the country.
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Considering that the bridge site is located in Qilu, it has a long history and a profound cultural heritage, Zhang Lei visited the Confucius Temple in Qufu many times and studied traditional Chinese architectural elements such as Lingxing Gate, side feet, Shengqi, and Quefei, and finally applied these elements to the design.
"When we design, we strive to perfectly integrate the bridge with the surrounding natural and humanistic environment. We must not only inherit Chinese traditional architectural aesthetics in aesthetics, but also reflect the inheritance of Chinese traditional culture." Zhang Lei said that the bridge is currently under construction and will span the Yellow River in the near future and become one of the local landmark landscapes.
For many years, Zhang Lei has condensed his aesthetic pursuits on bridges. The Heqi Passenger Dedicated Songhua River Super Bridge, which he was responsible for the landscape design, set off the surging river water with a unique bridge style like undulating mountains; the Hangzhou-Taiwan High-speed 188bet mobile login Jiaojiang Super Bridge, which he presided over, has a slenderness, elegant temperament, and the soft white cable-stayed cables and the blue sea and sky complement each other...
The mountains and rivers are connected, and the rainbows are like picturesque. With his outstanding skills, Zhang Lei carved each bridge into a beautiful blend of technology and art, adding countless bright scenery to the land of the motherland.
Growing wisdom from traditional culture
Zhang Lei grew up in Datong, Shanxi, a famous historical and cultural city. His parents were both 188bet mobile login workers, and his childhood home was near the 188bet mobile login line. The white mist gushed out from the steam engine, the long whistle that the train left far away, and the strong cultural atmosphere of the ancient capital, together constituted Zhang Lei's childhood life picture.
A person’s life is a process of constantly looking back to his hometown. As we grow older, how to combine the 188bet mobile login work we are engaged in with traditional culture has become a new proposition that Zhang Lei thinks about.
"Traditional culture embodies the deepest spiritual pursuit of the Chinese nation, and we should draw strength from the excellent traditional Chinese culture." Zhang Lei said.
In the design of large-span steel truss stiffened continuous beams of Zhengfu High-speed 188bet mobile login, since the main span of the continuous beam is as long as 172 meters, the expansion and contraction displacement generated at the end of the beam will be relatively large, and a rail expansion and contraction regulator is required, but this section of the line is a curve, and it is not advisable to set up a regulator.
"Set or not?" I can't find a suitable solution for a while. On a night of hard thinking, Zhang Lei, who was familiar with ancient books, suddenly thought of a sentence in "The Analects of Confucius: Zheng" "Do whatever he wants without breaking the rules". He excitedly picked up his pen and hurriedly wrote down the inspiration for this moment.
The next morning, Zhang Lei summoned the group team: "'Do what you want' and 'not exceeding the rules' are both contradictory and unified. It applies to the bridge. We can give the bridge limited freedom and allow the two ends of the beam to split the total expansion and contract equally, so that the expansion and contraction amount originally at the far end can be reduced, so that there is no need to set up a regulator."
The collision between traditional culture and modern industry breaks the thinking and path dependence of bridge design in the past. Zhang Lei led a team to develop a "limited free constraint system" and a limiting device with adjustable functions, which successfully achieved that the 188bet mobile login large-span continuous beams did not require a rail telescopic adjuster. This is an important innovation proposed by our country in the field of world 188bet mobile login and bridges.
In 2021, Zhang Lei, based on his years of experience in bridge design and in-depth thinking on bridge engineering, published a monograph "The Way of Bridges - The Inspiration of Chinese Philosophical Thoughts on Bridge Engineering", which caused a great response in the industry. He integrated philosophy, architectural aesthetics and engineering, broke the barriers and boundaries of traditional disciplines, and expressed his perseverance in craftsmanship and cultural awareness with the philosophy of "all things are nurturing together without harming each other, and Taos are parallel without contradicting each other" in the traditional culture of the Chinese nation.
In the design of the bridge tower of Dongying Yellow River Road and 188bet mobile login Bridge of Tianjin-Wei High-speed 188bet mobile login, Zhang Lei pioneered the use of a new cable-beam anchored structure with cross anchoring to the core concrete, which not only facilitates construction, but also significantly reduces the cost of the project. This is the inspiration he got from Mozi's idea of saving money and benefiting the people.
In the design of large cable-stayed bridges such as the North Passage Bridge of Hangzhou Bay Cross-Sea Bridge, Zhang Lei designed a structure that combines both rigidity and softness, and used the flexibility of the cable-stayed system and the setting of dampers to allow the bridge to overcome hardness during earthquakes to better achieve shock absorption. This is the inspiration he got from Lao Tzu's dialectical thought.
"The excellent traditional Chinese culture is the crystallization of Chinese civilization, the root and soul of the Chinese nation, and the foundation for us to gain a foothold in the turmoil of world culture." The call of the times has made Zhang Lei more determined to use 188bet mobile login bridges as a carrier and inherit the unique wisdom of the Chinese nation.
The Changhong Flying Frame embodies the skills and craftsmanship of Zhang Lei and the team, supports the wheels and rails of China's high-speed rail, leads to the future of independent innovation, and also leads to the practical path of Chinese-style modernization construction.
Zhang Lei
A member of the Communist Party of China, deputy chief engineer of the Civil Engineering Academy of 188bet mobile login Design Group Co., Ltd., and chief expert of the Changda Bridge and Tunnel Technology Research Center, has won the Youth Award of the 12th Zhan Tianyou Railway Science and Technology Award, and 188bet mobile login Construction's "Most Beautiful Iron Man" and other honors.
Interview Notes
Love can last for the long time
Speaking of his connection with the 188bet mobile login bridge, Zhang Lei remembered that when he was a child, he built a long bridge with small pieces of wood in his grandmother's yard. Since then, he has become interested in bridges. Looking back, this love has a special liking for more than 40 years and has become a 188bet mobile login bridge designer's background in life.
Retrospect the bridge-building career that lasted more than 20 years, Zhang Lei could hardly remember anything particularly difficult. Even the darkest moment of research, he enjoyed it. He always considers how to make a 188bet mobile login bridge safe, reliable and beautiful. What he pursues is to inject soul into this huge steel bar and iron bone. Because of his love, he did not feel the hardships and innovated consciously, and built 188bet mobile login bridges into industrial monuments of scientific and technological innovation, and into artistic masterpieces full of aesthetic interests and humanistic connotations.
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