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Yongding new river damp-proof gate
Haihe River basin Yongding Xinhe estuary control project
Yongding Xinhe damp-proof gate is a control project of Yongding Xinhe estuary in Haihe River basin. According to the flood discharge capacity of 50 years design, 100 years check standard, 20 hole gate.
The main task of the damp-proof gate of Yongding Xinhe River is to keep the sediment from the estuary, ensure the flood safety of the upper reaches of Yongding Xinhe River and Chaobai Xinhe River, and ensure the flood control and damp-proof safety of the middle and lower reaches of the North four rivers in the Haihe River basin, especially the central urban area of Tianjin and the Binhai New Area.
In November 2007, the first phase of Yongding New River management project was officially started. The total investment of the project is 1.011 billion yuan, and the project was completed in May 2011.
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- Chinese name
- Yongding new river damp-proof gate
- site
- Yongding Xinhe Estuary, Beitang Town, Beichen District, Tianjin
- Construction time
- November 2007 - May 2011
Yongding new river damp-proof gate location
Yongding New River
, rising in the west
Beichen District
Kujiadian, from Beitang Town, Tanggu District to the Bohai Sea, has a total length of 66 kilometers, including the airport drainage river, Beijing sewage River, Chaobaixin River and Jicanal along the way. It is the common channel of Yongding River, North Canal, Chaobai River and Jicanal in the northern part of the Haihe River basin to the end of the sea. It controls the 83,000 square kilometers watershed area of the North Four Rivers and relates to the flood control safety of the vast area of the Beijing-Tianjin-Hebei region.
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Yongding New River is a channel into the sea, downstream for tidal river. Since the excavation in 1971, due to the influence of atmospheric precipitation and human activities, there has been almost no runoff discharge in the upper reaches, and no tidal sluice has been built at the mouth of the river. The river has been under the control of the tide for a long time, and sediment has continuously accumulated in the river with a large number of sea areas upstream of the tide, and the flood discharge capacity of the river has greatly decreased. The flood capacity of the New River in Yongding has been reduced from 1400 to 4620 cubic meters per second to 600 to 1500 cubic meters per second.
In order to alleviate the threat of flood to the urban area of Tianjin, Tianjin began to dredging the river above Dazhangzhuang in 1989, and pushed forward to the downstream year by year. In order to maintain the results of dredging, temporary embankment was built at the end of each stage to avoid the dredging of the dredged river section. If the sedimentation of Ren River course continues to develop, it will soon affect the discharge of Chaobai New River and JiCanal, so that the flood control of Yongding New River and Beiyi River will be lost. Once a large flood occurs upstream, the flood diversion area reaches 1160 square kilometers, which will cause huge economic losses.
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Zha Shang River (Sanhe Island area)
Sluice channel
Yongding New River damp-proof gate according to the flood discharge capacity of 50 years once design, 100 years once check standard, 20 holes.
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Yongding new river damp-proof gate main body
Yongding New River damp-proof gate is divided into left and right bank control building, lock room and upstream and downstream traffic.
The left and right bank control buildings are arranged symmetrically, with a total of 4 floors, each building area of 2600 square meters. Gate chamber 20 holes, including deep hole 8 holes, each hole net width of 15 meters, total width of 137 meters, bottom elevation -6 meters; Shallow hole 12 holes, left and right 6 holes, each hole width 15 meters, total width 240 meters, bottom elevation -1 meters. The total width of the chamber is 350 meters.
The deep hole working door adopts a double-leaf steel gate. The upper leaf door is located on the lower downstream side and can be moved up and down along the door slot. When the tide is absorbed, the surface water of the sea tide is injected into the upstream channel to reduce the sedimentation. When washing and silting, the upper leaf door does not move, and the lower leaf door is opened for washing and silting; Open both the top and bottom doors at the same time. The shallow hole working door adopts a single leaf door, which is used to keep out the tide and open the gate when the flood is absorbed. Both deep and shallow gates are opened and closed by hydraulic opening and closing machines.
According to the maintenance requirements, maintenance gates are set up upstream and downstream of the lock room, and traffic Bridges and working Bridges are arranged at the top of the pier. The bridge floor width is 8.55 meters, and the bridge top elevation is 5.8 meters. The machine room is located on the mechanized bridge, the mechanized bridge elevation is 14 meters, and the total height from the roof to the traffic bridge is 13 meters.
The moisture-proof gate adopts the operation management principle of "no one on duty, less people on duty", and the central control room is located in the control building on the right bank, and remote control is achieved through the computer monitoring system. The monitoring object is mainly the water level of the upstream and downstream of the moisture-proof gate, the opening degree of the gate, and the realization of the functions of flood control, drainage and moisture-proof by controlling the opening and closing of the gate. The management room is located outside the upstream right embankment of the damp-proof gate, adjacent to Beitang Ancient Town.
The control building is a 4-story frame structure, the length of the control building is 36.26 meters, the width is 16.46 meters, and the vertical arrangement from bottom to bottom is: stacked beam library, control room and spare parts library. There are staircases and elevators to connect the upper and lower floors.
Hoist working bridge a total of 20 spans, each 2 hole lock chamber is connected, each joint 35 meters, upstream and downstream direction 11.2 meters, 14 meters of elevation below the open type, the following is the frame structure of the hoist and close machine room. The length of the machine room is 350 meters, the span is 7.2 meters, the height is 7.9 meters, and the traffic between the upper and lower levels is connected through the traffic ladder in the control building at both ends and the steel ladder in the middle of the machine room. The opening and closing oil cylinder sleeve is located in the opening and closing machine room, where the deep-hole oil cylinder sleeve extends 5 meters out of the level and the top elevation is 27 meters. Yongding Xinhe damping-proof gate, with the reputation of "the first major gate in North China", is located at the downstream side of Rainbow Bridge, the gateway of the central ecological city, next to Beitang Ancient Town. With a total length of 422.5 meters and a height of 24.63 meters above the water, the landscape design scope is on both sides of the Yongding New River at the site of the gate, including 50 meters wide and 400 meters long (under the Rainbow Bridge) outside the left and right banks of the upper reaches of the gate, 450 meters long, 30 meters wide on the right bank and 50 meters wide on the left bank.
A new damage-proof gate will be built at 63+041 of the estuary to prevent sea sand from accumulating on the channel. The damp-proof gate is a second-class project, the building is a second-class project, the design flood recurrence period is 50 years, the check flood recurrence period is 100 years, and the design and check peak flood flow at the corresponding gate location are 4640 cubic meters/second and 4820 cubic meters/second, respectively. The damp-proof gate is arranged with deep and shallow holes, with a total of 20 holes, of which the deep hole bottom plate of the main slot has an elevation of -6.0 meters and counts 8 holes, each hole has a net width of 15 meters. Shallow hole bottom plate height -4.0 meters, a total of 12 holes, each hole width of 15 meters, the left and right sides of each arranged 6 holes.
The length of the lock room is 350 meters wide, and the control buildings on both sides are up to 422.5 meters. According to the needs of the project, the lock room is up to 12 meters. Damp-proof gate is divided into left and right bank control building, lock room and upper and lower traffic. The left and right bank control buildings are arranged symmetrically, with a total of 4 floors, each building area of 2600 square meters. The damp-proof sluice comprehensively considers the current scouring and silting situation of the river under the sluice, reduces the amount of silt removal under the sluice, and suits the development principle of Binhai New Area of Tianjin. The scheme of 20 holes is finally determined. Among them, there are 8 deep holes, each hole is 15 meters wide, the total width is 137 meters, and the bottom elevation is -6.0 meters. Shallow hole 12 holes.
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In November 2007, the first phase of Yongding New River management project officially started construction, with a total investment of 1.011 billion yuan, the main contents of the project include: according to the flood discharge capacity of 50 years once designed, 100 years once checked standards in Yongding New river estuary to build a 20-hole damp-proof gate, right embankment restoration of 2.58 kilometers, new around the levee and dredging channel 13 kilometers, etc. As the core of the first phase of the project, the main project of Yongding Xinhe damp-proof gate started in June 2008, with an investment of 775 million yuan, and the project was completed in May 2011.
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The damp-proof lock of Yongding Xinhe River can keep the sediment brought by the sea tide out of the estuary, so that the flood water of the upper reaches of Yongding Xinhe River and Chaobai Xinhe River can be safely released into the sea, and ensure the flood control and moisture-proof safety of the middle and lower reaches of the North Four rivers in the Haihe River basin, especially the central city and the Binhai New area. In the flood season of 2012, Tianjin was hit by continuous heavy rainfall and typhoon. Through scientific operation, Tianjin Municipal Prevention and Control Bureau timely lifted the Yongding Xinhe damp-proof gate to catch the tide and release water, and accumulated 969 million cubic meters of drainage water, effectively reducing the water level of Jihe River, Chaobai Xinhe River, North Canal and other rivers upstream, creating favorable conditions for the smooth discharge of upstream floods. At the same time, according to the ebb and flow of the sea tide, timely close the damp-proof gate of Yongding Xinhe to block the tide, especially when the storm surge caused by the typhoon hits, prevent the water upstream at the high tide of the estuary, effectively reduce the sedimentation of the estuary, and ensure the moisture-proof safety of the Binhai New Area. Yongding Xinhe damp-proof gate has become a powerful barrier for flood control in Tianjin, which can "discharge flood water from above and block sea tide from below".
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