Source: [Zhoushan Daily - Zhoushan Network]
Welcomes the top 20, stand at the tide and watch the "boat" journey. Visit the country's leading Zhoushan blot ④
Lonely East China Sea , Zhoushan once "no boats can't travel".
bridge connects the future, and now thousands of islands have "natural barriers become thoroughfares".
On December 29 last year, the Ningbo Zhoushan Port main channel project was completed and opened to traffic, connecting it to the longest Liandao Expressway and the largest cross-sea bridge group in the country.
In the past decade, from the largest cross-sea bridge group in the country to the world's highest transmission tower currently in operation, the people of Zhoushan, who are brave enough to forge ahead and create new nationally leading breakthroughs in the fields of roads, water, electricity and other infrastructure.
First-line visit
The largest cross-sea bridge group in the country is still extending on the Thousand Islands
Long rainbow lying on the waves, walking on the waves. The 26-kilometer-long Zhoudai Bridge is like a jade belt connecting the two islands of Zhoushan and Daishan.
htmlOn the morning of September 27, the reporter went to Zhoudai Bridge with maintenance workers to patrol. "The traffic flow is high during the National Day. We must thoroughly inspect it in advance to ensure that the bridge is in the best operating state." said Shuai Fan, head of Yandun Work Area, Zhoushan Project Department, the maintenance branch of Zhejiang Jiaotong Group, said.is less than a year after it was completed and opened to traffic, and the Zhoudai Bridge is still within the defect liability period. In addition to daily maintenance, Shuai Fan and his team have another important responsibility to discover various problems and defects and report them in a timely manner.
Unlike many cross-sea bridges in the past, Zhoudai Bridge adopts the construction technology of "straight assembly and sea hoisting". According to statistics, the prefabrication rate of the upper T-beam of the Zhoudai Bridge land bridge is 100%, the main line lower structure cover beams have a column prefabrication rate of 91.2%, the sea area bridge foundation uses a large number of steel pipe piles, the prefabrication rate of 84.5%, the main line lower structure prefabrication rate of 84.5%, and the superstructure prefabrication rate of 100%.
The yellow maintenance vehicle is moving forward slowly, and the wheels and the asphalt bridge deck are rubbing slightly. Shuai Fan and the workers kept observing the bridge's condition and found that small garbage such as cigarette butts would also parked on the side to clean it up.
"Now, all kinds of technical indicators of the bridge meet the conditions for safe operation." Shuai Fan pointed to the smooth bridge deck and told reporters that the prefabricated box girders weighing thousands of tons and dozens of meters long under asphalt have undergone various rigorous testing procedures before leaving the factory. Advanced technology achieves excellent quality and also brings convenience to later maintenance.
The history of the rise of the cross-sea bridge group is a history of breakthroughs in bridge technology.
The gray turtle ocean where the Zhoudai Bridge is located is located on the high wind speed belt along the coast of Zhejiang Province. The monsoon of typhoon is high in the surrounding navigation area, and there are many submarine pipelines. The average annual effective working day is only 200 days, and the construction conditions are very harsh.
htmlIn 2004, bridge builders used day and night to explore to turn a blueprint of the "bridge industrialization" model into reality, breaking through one difficulty after another.The piers weighing from 1,000 tons, bridge towers weighing from 100 meters high, and from splicing components, are all manufactured and assembled in prefabricated factories, which greatly reduces the offshore construction time and onshore construction area. This is an unprecedented technological change in the history of bridge construction in China, and it is called "building a bridge with building blocks" by industry insiders.
According to statistics, the total amount of concrete used for the construction of the main channel of Ningbo Zhoushan Port exceeds 2 million cubic meters, and the total amount of steel exceeds 800,000 tons, which is equivalent to the steel used in 3 Beijing Daxing International Airport terminal, ranking first among offshore transportation projects under construction. Zhoudai Bridge is the largest span-sea bridge project with large diameter ultra-long steel pipe pile foundation to date. Its main span span of the main navigation hole bridge is the world's largest span of the outer sea bridge; the northern navigation hole bridge is the largest span of the segment assembled steel-concrete mixed beam continuous steel structure span of the sea bridge at home and abroad. Mao Youda, deputy director of the Municipal Railway Construction Center, is one of the witnesses, witnesses and participants in the rise of Zhoushan Bridge Group. Since 1997, he has participated in the construction of important transportation facilities such as Zhujiajian Bridge, Xincheng Bridge, Zhoushan Cross-Sea Bridge and East-West Expressway.
"It is easy to build a bridge without a bridge." Mao Youda was particularly impressed by the construction of Xi'anmen Bridge .
Xi'anmen Bridge spans the Xi'anmen waterway, with a total length of 2.588 kilometers. The main bridge is a two-span continuous steel box girder suspension bridge with a main span of 1,650 meters. The designed navigation level is 30,000 tons and a net navigation height of 49.5 meters. The bridge uses a split steel box stiffening beam that was unprecedented in the world at that time. It ranks second in the world in terms of main span length, can withstand super typhoons of level 17, and is one of the strongest wind resistance bridges in the world. In 2015, the bridge won the Outstanding Project Award for the Fidick Engineering Project, which is known as the industry's "Nobel Prize".
Craftsmanship comes from details. "Only the bridge deck paving is the goal of "maintaining 3 and striving 5 and creating 8", that is, ensuring that the road surface will not be repaired for 3 years, striving to not repair for 5 years, and creating 8 years of repair records." Mao Youda clearly remembered that during construction, he and his colleagues insisted on "going to the bridge without a drop of water." In the hot summer season, before the hot asphalt, everyone on the bridge was surrounded by a thick scarf to ensure that the sweat did not fall to the ground, and they were even more careful when drinking water.
heads westward, the majestic bridge group spans the vast ocean and has become a veritable artery of economic and people's livelihood. According to statistics, in the past 12 years of safe operation of Zhoushan Cross-Sea Bridge, the traffic volume of bridges has shown a significant growth year by year, and the social and economic benefits far exceed expectations. In 2010, the traffic volume entering and leaving the Zhoushan Island through the Zhoushan Cross-Sea Bridge was 3.15 million, and it increased to 10.05 million last year. From January to July this year, the total inlet and outflow of Zhoudai Bridge reached 1.52 million vehicles.
"Giant Dragon" starts from the sea, and the natural barrier becomes a thoroughfare. At present, a number of cross-sea highway bridges such as the main passage of Ningbo Zhoushan Port have been completed and opened to traffic. The total construction mileage of Zhoushan Liandao Expressway has reached 74 kilometers, spanning 8 islands and having 8 bridges, forming the longest Liandao Expressway and the largest cross-sea bridge group in the country.
At present, a new round of major transportation infrastructure construction has begun, and the Ningbo-Zhou Railway and Ningbo-Zhou Expressway duplex projects are being steadily promoted. The world's largest span of road and railway combined bridge, the world's longest undersea high-speed rail tunnel... The bridge builders are working hard to deconstruct world-class problems.
htmlOn September 2, the second phase of the Liuheng Highway Bridge also officially entered the construction bidding stage. According to the design, the second phase of the Liuheng Highway Bridge includes two sea-span bridges, of which the main span of Shuangyumen Super Bridge is 1,768 meters, which will be the fourth longest single-span suspension bridge in the world in construction; the Qinglongmen Super Bridge has two spans of 756 meters, which will be the three-tower cable-stayed bridge with the largest span of the completed projects in the world.In the near future, a transportation network composed of railways and multiple cross-sea expressways will become a landmark highlight of Zhoushan's display of the world's first cross-sea bridge group.
Ten years of practice
Zhoushan’s major infrastructure continues to change butterfly
National largest cross-sea bridge group is just one microcosm of the leap of major infrastructure in Zhoushan.
In the past ten years, our city has invested heavily in urban and rural construction and built a large-scale construction, and a city with high-quality development of and a sea garden city with high-quality development of has begun to show its heroic appearance.
Zhoushan, freshwater resources are scarce. Severe drought was once a heart-wrenching memory for many people. In 1997, the Third Party Congress of the City first proposed the strategic idea of "Zhoushan's water development first", and a major strategy called "Continental Water Diversion" was immediately launched.
This summer, Zhoushan has high temperatures, less precipitation and long duration. The city's reservoir capacity of is once lower than 35%, triggering a yellow response to drought. Unlike more than 20 years ago, this summer, the first and second phases of the Zhoushan continent were fully driven, with 250,000 cubic meters of clear currents rushing in, and the production and life of millions of soldiers and civilians were basically not affected.
Mainland water diversion project is like an "island lifeline". Up to now, the first and second phases have diverted 160 million cubic meters of water and 330 million cubic meters of water respectively.
not only needs to "drink water", but also "drink good water". In September 2016, our city launched the third phase of the mainland water diversion project.
At present, the main part of the third phase project has been basically completed, and the remaining 6.5 kilometers of land pipelines in Ningbo land section and 20.97 kilometers of sea pipelines in Jintang Island water diversion project are still under construction, and the overall project is expected to be completed next year.On the basis of increasing the water supply, the third phase of the
project will undertake the rational allocation of mainland water diversion, and will also improve the on-island and inter-island water supply systems to alleviate the recent water tightness in Zhoushan’s main island, surrounding islands and major economic islands, and provide practical and reliable water source guarantees for the construction of Zhoushan Islands New District and national defense construction.
Like fresh water, electricity is also one of the most important foundations to support local development.
In 2013, our city proposed to build a unified and strong smart grid with 500 kV as the main power supply, 4-round 500 kV lines connected to the mainland, 220 kV as the backbone grid, and coordinated development of power grids at all levels.
Zhoushan 500 kV network transmission and transformation project, the world's first five-terminal flexible DC transmission project, 220 kV Yudong transmission and transformation project, , Putuo Dongji-Daishan Changtu 35 kV network transmission and transformation project, and other major power projects and people's livelihood power projects were launched one after another.
At 9:15 am on November 9, 2018, an orange-red S-64F helicopter set off from Jintang Island, Zhoushan, flew over the Xi'anmen channel, and "flying and wiping" at a height of 380 meters, completing the world's first helicopter cross-sea wire rope operation.
In January 2019, the Zhoushan 500 kV networked power transmission and transformation project, which had an investment of 4.62 billion yuan, was officially put into operation, and the power transmission capacity of Zhoushan's power grid has been increased by 3.3 times.
This project has created 14 world records: the 380-meter-high transmission tower built on the Jintang and Chezi islands, breaking the record of the world's first transmission tower height at that time; the world's first 500 kV cross-linked polyethylene submarine cable broke my country's dependence on related imported submarine cables ...
For ten years, with the strong support of the provincial party committee and the provincial government, Zhoushan has vigorously promoted the construction of transportation infrastructure, and water, electricity, roads, stations, docks, airports and other infrastructure have been completely renewed.
At present, Zhoushan has taken the lead in achieving the goal of full coverage of island land island transportation terminals with more than 100 people, one island and two marinas with more than 1,000 people, and a roll-on and roll-on docks with more than 3,000 people in the province; it has built a general aviation network with Putuoshan Airport as the center, covering Dongji Miaozi Lake, Shengsi , Taohua, Qushan and Daishan and other helicopters. Class A general airports that have obtained civil aviation certificates account for 50% of the total number in Zhejiang Province, ranking among the top in the province.
Long rainbow lies on the waves across the sky, "the most beautiful road" surrounds the sea reefs; the "blue island chain" connects small islands, and the aviation network connects the people's hearts; the Liandao expressway shocks the world, and the high-speed rail has been on the island for a period of time. Zhoushan, the "bridge" shows the future.
Zhoubao Blot
" infrastructure blot" in Zhoushan Daily
On December 9, 2013, Zhoushan Daily published "The Third Phase of Mainland Water Diversion Project Passed the Evaluation". The estimated total investment of the project is 2.773 billion yuan, and the average water diversion volume in many years can increase by 32.14 million cubic meters after completion.
On July 5, 2014, Zhoushan Daily published "The world's first five-terminal flexible DC project is put into operation in the boat". This project is the world's most end-of-terminal flexible DC project with the largest number of ends and the highest voltage level, with a total dynamic investment of 4.14 billion yuan.
On November 19, 2018, Zhoushan Daily published "A solid step in the preliminary work of Ningbo-Zhou Railway". The feasibility study and evaluation meeting for the newly built Ningbo-Zhoushan Railway was successfully concluded in Beijing, and the preliminary work of the Ningbo-Zhoushan Railway has taken another solid step.
On January 16, 2019, Zhoushan Daily published the "Zhoushan 500 kV network transmission and transformation project was put into operation yesterday." Zhoushan has officially entered the era of ultra-high voltage power grid 2.0.
On September 28, 2019, Zhoushan Daily published "East-West Expressway will be opened at 24:00 today." The largest island transportation infrastructure project invested by Zhoushan so far has been built, and Zhoushan’s main island has entered the “half-hour transportation circle”.
On May 25, 2020, Zhoushan Daily published "The first domestic submarine high-speed railway tunnel to complete offshore drilling". The offshore drilling work of the first undersea high-speed railway tunnel in China - the Ningbo-Zhou Railway Jintang Undersea Tunnel has been completed on the 23rd, laying an important foundation for the full start of construction of the main body of the tunnel.
On December 23, 2020, Zhoushan Daily published "The Ningbo-Zhou Railway officially started construction". It kicked off the second transportation revolution in Zhoushan's history.
On December 30, 2021, Zhoushan Daily published "The main channel of Ningbo Zhoushan Port is fully opened to traffic yesterday."The main passage and the Zhoushan Cross-Sea Bridge form the longest island expressway in the country.
On February 10, 2022, Zhoushan Daily published "Two major supporting coal-fired power projects in our city have been officially approved." Two major supporting coal-fired power projects, Zhejiang Neng Liuheng Power Plant Phase II project and Guoneng Zhoushan Phase III project, were approved and included in the key clean coal-fired power projects in Zhejiang Province's "14th Five-Year Plan" construction.
On June 1, 2022, Zhoushan Daily published the "Signed Investment Agreement of Liuheng Bridge in Hangzhou". Liuheng Bridge is an important part of the Yi-Yongzhou Opening Channel in the expressway planning of our province. Three agreements including project capital increase and share expansion, capital management, and investment compensation were signed.
This article comes from [Zhoushan Daily-Zhoushan Network] and only represents the author's views. The national party media information public platform provides information release and dissemination services.
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