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Continuous winding large diameter glass fiber reinforced plastic sand jacking pipe single jacking distance over km
Release time:
2023-07-28 10:48
Source:
From China Composite Material 2022-05-13 07:00, published in Beijing
(Qinyang Composite Materials Research Institute can provide intelligent production equipment for continuous winding large-diameter FRP sand jacking pipe mentioned in this article)
At 11: 00 a.m. on May 4, 2022, with the rotation of the cutter head, the pipe jacking machine pulled sections of new continuous winding FRP sand jacking pipes out of the receiving well like a giant dragon, the 1187.5-meter jacking interval of well 6-well 5 in bid section 2 of the water quality protection project for sewage interception and diversion of the Yangtze River to Huaihe River constructed by China Railway No.4 Bureau has been successfully completed. This moment also marks the birth of a new record for the single jacking distance of this new type of pipe in practical engineering application.
According to Zhang Jianghong, the design representative of Anhui Water Conservancy and Hydropower Survey, Design and Research Institute, the design unit of the project, "The length of wells 6 to 5 under construction is 1187.5 meters, the diameter of the pipeline is 2.4 meters, the buried depth of the overburden is 10.2-11 meters, and the crossing soil layer is weakly expansive silty clay layer with a slope of 0.3 percent. The construction difficulties mainly lie in the long construction distance, the large friction resistance of pipe joints and the tight construction period." To this end, the project pipe selection of Fujian Lutong Pipe Industry Technology Co. The outer wall of the pipe is smooth and hydrophobic, which can effectively reduce the friction resistance between the pipe section and the soil; the weight of the pipe is light, which makes the pipe deviation correction easier and ensures the slope of the pipeline by 0.3; the compressive strength of the pipe is high, which ensures the smooth progress of the ultra-long distance pipe jacking construction. This is also the first time that this new type of pipe has been applied in the domestic large-diameter ultra-long-distance pipe jacking project. "Different from the usual pipe joints made of reinforced concrete, this construction adopts continuous winding of glass sand jacking pipe by road. The weight of the pipe with the same diameter is only 1/10 of that of cement pipe, but the pipe wall has solid and tight structure, good sealing and earthquake resistance, corrosion resistance and convenient installation." Zhang Jianghong added. Zheng Guangcan, director of project management of Hefei Water Environmental Construction Investment Co., Ltd., the construction unit of the project, introduced that the Yangtze River to Huaihe River diversion project is a large-scale inter basin water transfer project with comprehensive benefits such as agricultural irrigation water supplement, ecological environment improvement and development of Jianghuai shipping. It is a strategic project of water resources allocation in Anhui Province and a major infrastructure for the province's economic and social development and water environment improvement, it is of great significance for improving the water environment of the river, improving the flood discharge capacity of the river, intercepting sewage in an all-round way, and developing and constructing the environment.
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