In order to vigorously carry forward the spirit of labor models, the spirit of labor, and the spirit of craftsmen, solidly promote the construction and reform of the industrial worker team, and unite and mobilize the majority of employees to greet the victory of the party's 20th National Congress with practical actions, the 2021 "Big Country Craftsman Annual Person" release activity jointly organized by the All-China Federation of Trade Unions and the Central Radio and Television Corporation announced the selection results on March 2, and Chen Zhaohai, an engineering surveyor of the Third Engineering Co., Ltd. of CCCC First Aviation Bureau, was honorably selected!
Chen Zhaohai: In the past 26 years, he has participated in the construction of the first 300,000-ton ore wharf, the first aircraft carrier dock, the first double-decker anchor suspension bridge and other national key projects. He is persistent and dedicated, has the courage to innovate, and has cultivated a pair of eyes and a pair of skillful hands, in pursuit of the ultimate craftsman's ingenuity, to escort the construction of the big country project.
Chen Zhaohai is currently the chief technical expert of the First Aviation Bureau and the Three Companies. Since joining the work in 1995, he has successively participated in the construction of the first 300,000-ton ore dock in Dalian Port, the first 300,000-ton ore dock project in Dalian Port, the first aircraft carrier dock in the mainland, the new dock project of Xianglu Reef of Large Ship Heavy Industry, the No. 1 dock project of COSCO Dalian Shipbuilding Project, the no. 1 dock project of COSCO Dalian Shipbuilding Project, the first double-layer anchor suspension bridge in the mainland, and the extension project of Dalian Bay Submarine Tunnel and Guangming Road. He has won the honors of National Model Worker, National Technical Expert, National Transportation Technology Expert, Liaoning Craftsman, Liaoning Provincial Labor Model and so on. The award speech commented: "He is persistent and dedicated, has the courage to innovate, and has cultivated a pair of wise eyes and a pair of skillful hands, in order to pursue the ultimate craftsmanship and escort the construction of the national project." ”
Chen Zhaohai has been pursuing the ultimate in measurement accuracy for twenty-seven years, relying on research and tempering, with focus and perseverance, creating one after another measurement industry legend.
Chen Zhaohai, a member of the Communist Party of China, born in December 1974, graduated from Tianjin Aviation Technical School in 1995 majoring in surveying and testing, and is now the chief technical expert of the third company of CCCC No. 1 Aviation Bureau, as the main person in charge of surveying construction, he is the on-call "Spider-Man" on Sota, and also the winner of the Zhan Tianyou Award of China Civil Engineering, and he has set a miracle of relying on manual measurement methods to control the caisson subsurface base bed mark with high precision at the centimeter level... Challenge after challenge, leap after leap, professionalism, concentration and concentration have been integrated into his blood, he uses persistence and perseverance, intention and delicacy, again and again to write the skills and legends of Chinese engineering.
When it comes to bridge builders, the first reaction in everyone's mind will be to think of engineers, and when people talk about railway builders, people often think of road builders.
However, there is a type of professional work that will appear on major construction sites, they hunch their backs, squeeze their eyes, and locate the precise angle, height and depth for the construction personnel through the measurement data of the instruments mounted on the tripod, and they have a common name - engineering surveyors.
Chen Zhaohai is one of the thousands of engineering surveyors, mainly engaged in water conservancy engineering surveying, he participated in the mainland's first 300,000-ton ore dock, the first aircraft carrier dock, the first sea anchor suspension cable bridge and other landmark projects.
When one honor after another "attacked" Chen Zhaohai, who had made great achievements in battle, he acted a little overwhelmed. "Most of the craftsmen in big countries are engaged in important work such as missile carving and aerospace welding, and compared with them, I have no finished products." Despite Chen Zhaohai's words, it is known that all projects need to be based on measurement. When the project starts, the survey takes precedence, so the surveyor is often compared to the "eye of the project".
27 years ago, Chen Zhaohai stood on the engineering surveying post of "sweating in the summer and cold at both ends in the winter".
27 years later, the hydraulic engineering measurement tools were upgraded from bathymetric rods and bathymetric hammers to echosin sounders, from single beams to multiple beams, from dot and linear bathymetry to belt bathymetry, and he is still in this position.
In the past 27 years, Chen Zhaohai has only done one thing: "measuring points and lines", but the number needs to be calculated in "millions".
Looking back on his career, Chen Zhaohai, the chief technical expert of the national labor model and the third company of the CCCC First Aviation Bureau, is very emotional: measurement is like the "eye" of the project, and the more you invest in it, the more you will feel that those points and lines have been integrated into your life. The precise completion of one big country project after another has made the millions of data he measured have a special significance.
27 years "Measuring points and lines"
Chen Zhaohai, a "rough man" who was not tall and had a dark face, was doing a "delicate job."
3 to 5 centimeters, this is Chen Zhaohai's eyes countless data that can not exceed the deviation. 300,000-ton ore dock, the first aircraft carrier dock, Dalian Cross-Sea Bridge, Dalian Bay Undersea Tunnel... The shocking miracle in people's eyes is in his eyes countless dots and lines intertwined.
0.5 seconds, which is the accuracy of the total station used by Chen Zhaohai. On the ship, on the bridge, in the tunnel, he used to close his left eye and use his right eye to observe the data, which became the "big and small eyes" for many years. For each engineering project, he was the first to enter the site with the instrument to do the pre-construction lofting, wait until the project was fully completed and accepted, and finally left.
In 2004, Chen Zhaohai's 300,000-ton ore terminal project in Dalian Port entered the dry stage, and when GPS technology was not used, the flatness of the base bed could only be tested by "drawing water", in order to install more caissons in the tide only twice a month, he often ate and lived at sea for several days, and stayed on the caisson for 26 hours at the longest time.
More than 40 pounds of "depth measurement" are thrown hundreds of times a day, and you must trot out after the current. In the depths of winter, the cold and violent sea breeze hit his body, Chen Zhaohai's eyebrows and beard were covered with frost, and the splashing sea water froze the front of his clothes into "ice armor".
Affected by factors such as water flow, water depth and ruler depth deformation, the bathymetric reading time must be completed within 2 or 3 seconds of the counterweight touching the seabed, and the optimal reading time is less than 1 second, and ordinary people have no time to react. Chen Zhaohai, who did not accept defeat, practiced for several months, took all his spare time to practice his eyesight and reaction speed, and trained a set of rapid reading methods into muscle memory, relying on manual measurement to control the caisson underwater base bed mark with high precision within 10 centimeters.
The accurate data provided by Chen Zhaohai for the underwater foundation construction ensures the efficient advancement of caisson installation. The project eventually won the Zhan Tianyou Award for Civil Engineering of China.
Let the instrument grow "hands and feet" to stand on the seabed
At the beginning of 2018, the Dalian Bay Submarine Tunnel Project was launched, and the sea conditions and geology are very complex, with multiple reefs and caves. As the first immersed tube tunnel built by the mainland in the cold sea, the deviation accuracy is required to be 5 centimeters, and the first underwater sweep data is 10 centimeters different from the existing base bed leveling acceptance data.
"At that time, a two-dimensional single-beam bathymetry system was used, and the bubbles spat out by a small fish would affect the bathymetric results." Chen Zhaohai went to the equipment manufacturer to investigate, and went to the Hong Kong-Zhuhai-Macao Bridge project and the Shenzhen-Zhongshan Corridor project to learn on the spot. After a multi-party campaign, a multi-beam device that can be scanned in three dimensions was introduced.
With the "diamond drill", Chen Zhaohai and his co-workers were doubly confident. At this point, a new problem arises. The construction environment of the submarine tunnel is far less stable than that of the land, and the wind and waves are the norm, which greatly affects the accuracy of multi-beam equipment.
"The instrument can't control the level, we can help it 'grow' out of the hands and feet." Inspired by folding umbrellas, Chen Zhaohai proposed the idea of customizing connecting frames for five divisional instruments of a multi-beam system.
He pulled the measurement and maintenance team to analyze the geometric relationship between instruments such as transducers, attitude meters, main and secondary antennas and auxiliary sensors, and studied the length and material of the brackets. In 4 months, the material was changed from angle steel and galvanized iron pipe to stainless steel square pipe; the length of the bracket was changed from 3 meters, 2.7 meters to 2.5 meters, and after many improvements, a detachable connector that could be spliced and suitable for any ship type was finally developed, so that the instrument grew the "hands and feet" of grasping the ship's side and standing on the seabed.
10 cm, 7 cm, 5 cm... The measurement effect after the connector is stable is accurate all the way. The workload of a single beam is 6 hours, and the multi-beam equipment with more hands and feet takes only 30 minutes. "As long as you want to do it, there is nothing that cannot be done!" Speaking of technological innovation, Chen Zhaohai's tone is firm.
Missed the birth of a son, but had apprentices full of major projects
With the acceleration of the company's reform and transformation, Chen Zhaohai has been shuttling through key projects all over the country all year round, leaving his footprints in countless construction sites from the foothills of Changbai Mountain to the islands and reefs of the South China Sea. Since 2007, the company's projects have blossomed at many points, and he has led more than 50 young surveyors to undertake the surveying work of 7 engineering projects.
When his wife was about to give birth, Chen Zhaohai was busy at the site of the Xianglu Reef Dockyard project. When he received a call to accompany the delivery, his wife cried silently on the other end of the phone, but he had to hang up because he was busy.
There was something that made Chen Zhaohai feel very unhappy. Once, after a long time of not returning home, he went to the kindergarten to pick up his son from school, stood outside the kindergarten, watched his son jump to the school gate, but stopped by his side and looked for his father. "My son doesn't recognize me!" Chen Zhaohai's eyes turned red at that moment. He hadn't witnessed his son's birth, he hadn't even hugged him properly, and how dare he expect his son to recognize him at a glance.
Today, Chen Zhaohai's disciples have spread all over the company's major projects at home and abroad: in 2014, apprentice Zhang Qiang won the title of technical expert of CCCC Group; in 2018, apprentice Guan Zhongchun won the second prize of the Engineering Surveying Competition of the Beijing-Tianjin-Hebei Coordinated Development Integrated Construction Staff Vocational Skills Competition and the second prize of the CCCC Group Skills Competition.
Although he has a proud honor and an outstanding apprentice, Chen Zhaohai has remained like a day for more than 20 years, stepping on his post at a relaxed pace every morning, transforming the vast land into points, lines and surfaces again and again.
An action ten years of work
Engineering construction, survey first. In the Dalian Bay Submarine Tunnel Project, the first immersed tunnel built in the cold waters of the northern mainland, a slight deviation from a measurement point in the face of the unpredictable underwater world may trigger a chain reaction, resulting in immeasurable losses. Chen Zhaohai always requires himself to read more accurately than the instrument every time. The observation accuracy of the caliper on the instrument can only be centimeters, so the millimeter piece needs to be estimated and read out by ourselves. How to read this millimeter accurately, this basic skill I have been practicing for ten years.
A lump of water is set
During the construction of the mainland's first 300,000-ton ore wharf, due to the extremely complex sea conditions in the construction area and frequent errors in advanced measurement equipment, the entire project was forced to stall. Chen Zhaohai pondered and finally remembered a traditional hand-measured method that his teacher Had taught him, the water lump. Drawing water lumps in stable waters is a difficult technical task, and in construction areas with turbulent waters and complex situations of more than 30 meters, the degree of difficulty can be imagined. In order to obtain accurate data, prevent the water lump from being washed away by the sea. Chen Zhaohai specially built a water lump weighing more than forty pounds, throwing it into the water while trotting, grasping the reading timing of only two or three seconds in the run. In order to practice this kung fu, Chen Zhaohai ate and lived on the sea, holding more than forty pounds of iron knots and practicing repeatedly. More than 20,000 square meters of wharf, more than eight months of long construction period, Chen Zhaohai insisted on throwing water lumps hundreds of times a day, his arms were tired and numb, still gritted his teeth and insisted, and finally the measurement accuracy of tens of thousands of points was successfully locked in the centimeter level.
As a senior and role model, what do you have to say to young people?
Chen Zhaohai:
I hope that young people can be down-to-earth and down-to-earth in their work, have confidence and hope for the enterprise, do their best and do every task every day with due diligence, and believe that ordinary work can also create brilliance.