This is a new technology success of the tunnel construction and construction industry in China
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Usually, the first mock exam is inefficient in the extremely hard rock formation
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has made scientific planning, actively innovated, and organized expert demonstration meetings with the participating units for many times
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In order to ensure the construction progress, Guangdong Pearl River Delta Intercity Rail Transit Co., Ltd
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The up and down lines are involved in two mode conversions
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The length of Dayuan Taihe shield tunnel is 6.144 km
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It is agreed that the two functional modes of EPB and TBM can coexist at the same time, and the switchable design has the advantages of both EPB and TBM, so as to meet the construction requirements In the soft soil layer, soft rock layer and full cross-section rock layer composite section of the smooth excavation
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The TBM mode of single shield dual-mode roadheader began
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The earth pressure mode will arrive after 1397m
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It can be used as a model for the promotion of EPB / TBM dual-mode shield in China
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After the start, the earth pressure balance mode (EPB) is used to excavate 2535 m, and then the construction is carried out For the first mode conversion (EPB → TBM), the TBM mode is adopted to excavate 2212m, and then the second mode conversion (TBM → EPB) is carried out
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Welcome to pay attention to the top, and also welcome you Search official account: civil engineering tunnel net, invested by Guangdong Pearl River Delta Intercity Rail Transit Co., Ltd., the 2 ring project of the Pearl River Delta Intercity Guangfo Ring Road East ring, which is responsible for the construction of the nineteen Bureau of China Railway, the first domestic railway large diameter single shield dual-mode roadheader was successfully developed by the EPB mode online conversion TBM mode
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Long press the QR code to pay attention to the complete construction process of our municipal pipeline! Bridge pile length calculation! How is the tunnel “refined”? Super 4 minutes animation reveals the truth Don’t envy the permeable pavement abroad, come to see that China can also make permeable ecological pavement!! Standardized construction diagram of anchor frame and prestressed anchor cable (anchor rod) for slope protection!.
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Through the parallel design of the main machine belt conveyor and screw conveyor, the process of component disassembly and replacement in the previous mode switching of the same type of equipment is reduced, and the mode conversion can be completed in only 7 days, which makes the conversion of the two tunneling modes more convenient and reliable
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Among them, as an important construction method of modern tunnel and underground engineering project construction, shield method is widely used in urban rail transit engineering, highway engineering, railway engineering, urban utility tunnel and other engineering fields because of its high degree of mechanization, low construction safety risk, fast tunneling speed, small impact on construction environment, strong adaptability to complex geological conditions, etc The scale of tunnel construction is gradually expanding
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Update the recruitment information of national tunnel and Bridge Engineering every day, including (tunnel excavation, support, second lining, pavement, greening, piling, beam erection, various special operators, drivers, and other engineering posts), trade new and old mechanical equipment, including (excavator, loader, mixer, tank car, bulldozer, roller and other equipment)
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The single shield or double shield TBM can not be driven in the composite stratum
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In recent years, with the rapid development of domestic economic level and the progress of tunnel engineering construction technology, China has become the country with the largest scale, the largest number, the most complex geological conditions and structural forms, and the fastest development of construction technology in the world
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Two ztt9150 single shield double-mode shield machines were put into use in the construction of Dayuan Taihe station, the control project of section 3 of East ring 2 of Guangzhou Foshan ring line
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More and more new technologies and processes are used in shield machines, and the geological conditions they can adapt to are becoming more and more complex
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The layer distribution is particularly complex, and more than ten items involved are first touched at home and abroad
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This is the first time in China that Dayuan Taihe shield tunnel is put into use in railway tunnel
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After the earth pressure and TBM two functional modes can not coexist, the dual mode roadheader can take up to 1 months in the tunnel to carry out the earth pressure and TBM mode conversion, which affects the whole construction period of the project and the shield tunnel area with large interval
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With the continuous development of shield construction technology, the types of shield machines are becoming more and more abundant
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The participating units completed the first EPB → TBM mode conversion in 7 days at the beginning of October, followed by cutterhead maintenance and re propulsion on October 13
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