A split-start construction method for double-line shield tunneling in ultra-deep circular shafts

Abstract

A split-starting construction method for an ultra-deep circular shaft double-line shield. During construction, the first shield and the connecting bridge are assembled in the first area; the trolley platform is arranged in the second area; the trolley goes down the well And stacked on the platform of the trolley; install the reaction frame and support, and complete the starting preparation; the first shield tunneling starts; after the first shield tunnels to meet the requirements of the second shield trolley to go down the well, The trolley platform is arranged in the first area; the trolley goes down and stacked on the trolley platform; the preparation work for the departure of the second shield machine is completed. In the limited space, the method of the present invention adopts the method of stacking trolleys underground to make full use of the underground space, which can effectively reduce the extension of the pipeline and avoid various problems caused by the extension of the pipeline, and has the advantages of simple construction operation, economy and high efficiency. The advantages.

Description

technical field [0001] The invention relates to the technical field of double-line shield starting construction, in particular to an ultra-deep circular shaft double-line shield split starting construction method, which is suitable for space-compact shield starting construction. Background technique [0002] Under the condition of limited space, the shield machine is generally started by split, that is, only the shield main machine is arranged underground, and the shield trailer is arranged on the ground for split excavation. The pipeline is extended until the main engine is excavated to the underground space, and then the complete machine is assembled and then the whole machine is excavated for construction. This method is suitable for the start of construction of shield splits with limited underground space and not deep working wells. For ultra-deep circular shafts, pipeline extension, fixation, pressure maintenance, protection, maintenance, etc. are all particularly diffi...

AI Technical Summary

Problems solved by technology

Pipeline extension, securing, pressure maintenance, protection, maintenance, etc. are particularly difficult for ultra-deep circular shafts

[0003] The split start construction of ultra-deep circular shaft shield is the most difficult point of shield construction. At present, in the process of domestic traditional circular shaft split start construction, due to the excessive extension of pipelines, it is difficult to fix, easy to break, difficult to maintain, The problem of large loss of oil pressure and water pressure leads to long start-up period, low production efficiency and high cost of ultra-deep circular shaft double-line shield split

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