Astana in autumn, the wind on the grasslands is getting harder day by day. The locals are aware that the first snow in October is not far away. Once the snow falls, concrete pouring must stop, and the effective construction period for the whole year is less than six months. It was during this period of time that in early September, with the completion of the last pier pouring, China Construction Bridge Co., Ltd., a subsidiary of China Construction Sixth Engineering Bureau (China Construction Silk Road), undertook the construction of the 4-2 project of Astana Light Rail Phase II Line 4 in Kazakhstan, and cleaned up the work on the lower structure of the bridge.

The last pier pillar

479 pile foundations, 104 interval abutments, 25 station abutments, and 106 pier columns - all four sets of numbers will come to an end in early September. The pile foundation is deeply embedded under the frozen soil, and the abutment and pier columns are arranged from near to far, outlining the future direction of the elevated line. Extreme cold is the most difficult opponent here: Astana has a long winter, with extreme low temperatures reaching minus 40 degrees Celsius, and building material performance, construction technology, and mechanical equipment all need to be planned separately. The project team's approach is to break down the processes into the smallest units, scientifically optimize the workflow, strengthen the closed-loop connection of each process, so that every working surface does not idle, and fully improve the on-site construction efficiency.

The station rises from the ground

Push the time forward by half a month. At the end of August, the concrete pouring operation for the track layer of 402 station was completed, with a pouring volume of approximately 1100 cubic meters. This roadside station is approximately 86.5 meters long and 26.5 meters wide, using a horizontal three column frame structure with 8 axes and 7 spans in the vertical direction. After the completion of the track layer pouring, the project team quickly organized the process transition and entered the subsequent construction stage; The construction of the platform layer is also being carried out in an orderly manner, and the excavation of the foundation pit and the pouring of the cushion layer for the substation have been fully completed. From a pile to a deck, the outline of the station becomes increasingly clear below the grassland skyline.

Towards the Satellite City

Astana Light Rail Phase II Line 4 is approximately 9 kilometers long and is a regional line connecting Astana and Kosh cities. The entire line is elevated, with 3 stations and a fully automated operation system. After completion, it will be connected to the Phase I project for operation. The 4-2 section constructed by Zhongjian Bridge is the civil engineering project for the 402 station and the section from 402 station to 403 station, with a length of about 3 kilometers.

The weight of this line should be viewed together with the first phase that opened in May this year. The first phase of the 22.4-kilometer, 18 station light rail project is the first fully automated unmanned light rail in Central Asia, with a cumulative passenger flow exceeding one million in just two weeks of operation. The population growth in Koshi direction is rapid, and Kazakhstan's Minister of Transport has stated that after the completion of the line, about 50000 cars will no longer enter the capital every day. According to the plan, the total length of the second phase of the line is about 26.5 kilometers, with 20 stations, and it will be woven together with the first phase to form the rail network of the capital metropolitan area.keywords:Engineering infrastructure

The autumn wind is gradually tightening, and construction is in full swing. Completing one more process before the arrival of the cold winter means having more confidence in the opening schedule.Editor/Yang Meiling