Crimean bridge: how building
• Crimean bridge: how to promote the construction of
At the construction site of the Crimean bridge completed the next stage of the work: the last tubular pile is hammered into the ground. Total road foundation consists of more than 3 thousand piles. Very soon will begin installing automotive and railway arches of the bridge. And follow the progress of construction of the century is now possible from the top of Mount Mithridates, comfortably sitting on a bench on the bridge builders.
The builders have finished piling on the road of the bridge. "Pile of 1,420 mm and a length of almost 50 m and a weight of more than 40 tons submerged to project failure. This 16th pile in pile foundation bush 256th support and last across the road part of the Crimean bridge, "- said Ravil Dolgoarshinnyh, head of projects Mostootryad.
in the foundation pillars of the road bridge across the Kerch Strait are two types of piles used. Bored - a well depth up to 57 m, filled with reinforcement and concrete mixture. This type of pile used on shore Taman (first bridge abutments 20) and a support-abutment № Kerch 287 closer to the shore. Summary of bored piles in the road of the 475 units.
For the rest of the highway bridge foundations of supports made of steel pipe piles - more than 2500 pieces. The minimum immersion depth of 23, 5 m (Kerchenskaya side), the maximum - 89 meters (Tuzla Spit).
On the rail of the bridge work on the pile foundation is continuing according to schedule. The supports for railway type three piles apply: bored and prismatic (all made), and the tubular (more than 2800 pieces, formed by 65%).
First trubosvai builders began to sink on the island of Tuzla immediately after receiving approval from the Glavgosekspertizy and building permits in February 2016. The total weight of all the loaded under highway trubosvay -. More than 12, 5 tons, and the total length - 160 km.
For complete assembly of road arch Krymsky Bridge: its vault is closed at the height of 45 meters from the base of the structure. At the same time bridge builders are ready to install on the Fairway railway arch support.
"Arch Road transport - it is almost 200 major elements: blocks orthotropic plates, arches and so on. To bring them together, about 4, 5 km butt joints of the first category, twisted 175 thousand units (or almost 110 tons) of high-strength bolts was performed. flight weight in the end amount to almost 5000 tons.
The flexible suspension link with the lower portion curved arch structure (tightening). This solid ropes 6 cm thick, made of high tensile steel wire. Total arch in road took more than 1, 2 km ductile steel rope weighing about 25 tons. Pull the suspension up to a certain value of the project will have after the archways will install over the Kerch Strait waterway.
The calculated wind speed at a level roadway arch span up to 40 m / s. Therefore, to prevent the negative effects of aerodynamic studies have been conducted, which allowed designers to choose the form of fairings - special designs for the facade of road arch span. They will minimize the effects of wind and provide a comfortable operation of the arch. At the railway arch fairings are not used, as its constructive tougher due to pass-through the main farm.
The arch span of the railway bridge is ready for installation in design position. In mid-June it has been completed enlarged arch assembly, then the builders mounted the operating system: inspection moves, elements of engineering structures monitoring system lightning protection and grounding, aeronautical and marine signaling. The total weight of the structure is now more than 6000 tons.
The arched spans - the best overall elements of the Crimean Bridge. The length of each - 227 m, set the height at the highest point - 45 m (or 80 m of water). In this unique navigable span - such an overall structure (. Weighing about 10 tons) installed in marine conditions in domestic first bridge construction. Vertical clearance width of 185 m and a height of 35 m ensure unimpeded passage of all vessels plying through Kerch-Yenikalsky channel.
After the final completion of all work archways are alternately transported and assembled on Fairway support - first on the part of the railway, and then - on the road.
The portal "Crimean bridge" can be viewed with a 3D-visualization of existing road and rail traffic. The three-dimensional model is created based on a draft working documents and remains "live": it is refined and supplemented in the course of construction in the Kerch Strait.
The rendering includes a general view of the track from Taman to Kerch shore and detailed views of the scene as a fairway portion in daytime and at night.
The bridge will be lit across the road - it is a prerequisite for safe driving at night. White light illuminated all the support. In the navigable portion illumination poles increases significantly. In addition, the project provides a static picture of svetotsvetovuyu: archways highlighted in three colors: Road Arch - blue railway - red and Fairway bearings and external vertical structural elements of arches - white.
The Crimean bridge - should be one of the largest bridges in Russia. Its length - 19 km. It will consist of parallel spaced tracks: road and rail. The route begins on the Taman Peninsula, extends the existing 5-kilometer dam and the island of Tuzla. Then crosses the Kerch Strait, skirting the north cape the Ak-breaker, and goes to the Crimean coast.
highway will consist of 4 lanes. The calculated road speed - 120 km / h. Capacity of this route - up to 40 thousand cars a day..
Railway. Two paths with a capacity of up to 47 pairs of trains per day. The design speed of trains - 120 km / h, trucks - 80 km / h.
At the moment, the Ministry of Transport of the Russian Federation decided to establish restricted areas of the construction site of the bridge. The height of flight of the aircraft, drones, and balloons is now a restricted area of 1000 m Width -. 3 km, the length - the whole bridge length.
According to the current schedule, road part of the bridge is to be built by December 2018, and the railway - by December 2019.