The concrete pouring of the first aqueduct in the main project of the middle line of the South-to-North Water Transfer Project was successful

On November 9, from the South-to-North Water Transfer Central Line Construction Management Bureau, the world's largest aqueduct, the mid-line Caohe Aqueduct, was successfully poured into the main aqueduct concrete. At this point, the Caohe Aqueduct project entered the main construction phase.

The Caohe Aqueduct is a control project for the main line. The inner diameter, single span and flow rate are the first in the world. The project is located on the Weihe River between Zhangpo Village, Shilin Town, Dengzhou City and Zhaozhai Village, Zhaoji Town. The project has a total length of 1,030 meters, a total of 18 spans and a single span of 1,600 tons. The tank body is a three-slot prestressed concrete U-shaped structure independent of each other, and the inner space of the single groove is 7.23×9.0 meters. The design flow rate is 350 cubic meters per second and the maximum flow rate is 420 cubic meters per second.

The Caohe Aqueduct Project officially started on December 28, 2010, with a total contract period of 1005 days. After the project started, the builders first constructed the underground pile foundation. After 108 days of intense struggle, the pile foundation foundation infusion construction task of 342 friction piles was completed, and was transferred from the underground operation to the ground construction stage on June 12 this year.

In contrast to the prefabricated tank body, the on-site pouring construction technology of the slot machine used in the Caohe aqueduct is more challenging. “Like the freely retractable ladder on the pier, the U-shaped trough body is everywhere.” Cheng Dehu, deputy chief engineer of the South-to-North Water Diversion Central Line Construction Management Bureau, said that its structural design is novel, and the construction technology and equipment used are unprecedented. Into the South-to-North Water Transfer Key Science and Technology Project. The on-site pouring construction of the slotting machine can not only solve the impact of the topography and the topography on the entire construction site, but also minimize the impact of the flood season on the entire construction organization. During the entire construction, three grooving machines are planned to be installed. The maximum sizing machine has a total weight of 1,250 tons and a length of 88 meters.

In view of the high technical content of the concrete construction, the safety hazard source and the difficulty of construction, the South-to-North Water Transfer Central Construction Management Bureau, as the project legal person of the project construction, relies on scientific and technological progress and draws on the control objectives of quality, progress and cost. The mature experience of scientific management of external engineering construction, the implementation of the whole process planning, organization, coordination and overall control of the construction of the Caohe aqueduct project.

“Because of the complicated construction technology of the cast-in-place moulding, before the construction of the main body of the Weihe River, it is necessary to carry out the 1:1 simulation test construction, and then carry out the construction of the main body after the approval.” Henan Nanguan Construction Management Bureau Nanyang The person in charge of the project management department of the project department said that on September 7, the first warehouse concrete of the Caohe Aqueduct 1:1 simulation model was successfully opened and poured. Subsequently, the 1:1 simulation model test of the Caohe Aqueduct passed the joint acceptance of all parties. At the end of September, the hydraulic system of the internal model of the aqueduct grooving machine began to be commissioned, and the grooving machine entered the template installation stage. Among them, the Industrial and Commercial Department of Nanyang Project Department held many expert technical consultation meetings to solve the problems encountered in the simulation test one by one, and further optimized and adjusted the construction scheme of the main body of the Caohe Aqueduct.