Overall installing device and installing method for extra-large shield launching hole door sealing steel ring

Abstract

An overall installing device for an extra-large shield launching hole door sealing steel ring comprises a slide rail which is installed on the ground outside an extra-large shield launching hole door, a frame is arranged on the slide rail, a sealing steel ring is vertically placed on the frame, the extra-large shield launching hole door is provided with a steering wheel, a first chain block and a second chain block, the ground where the slide rail is far away from the extra-large shield launching hole door is provided with a third chain block, a fourth chain block is installed on a counter-force frame of a shied tunneling machine, the first chain block, the second chain block, the third chain block and the fourth chain block are provided with a middle pulling thread, a lower pulling thread, an upper pulling thread and a stabilizing thread respectively, the middle pulling thread and the lower pulling thread are connected with the middle and the lower portion of the extra-large shield launching hole door sealing steel ring respectively, the upper pulling thread winds through the steering wheel and is connected to the upper portion of one face of the extra-large shield launching hole door sealing steel ring, and the stabilizing thread is connected to the upper portion of the other face of the extra-large shield launching hole door sealing steel ring.

Description

technical field [0001] The invention relates to a super large shield engineering installation device and installation method, in particular to an overall installation device and installation method for the sealing steel ring of the departure portal of the super large shield tunnel. Background technique [0002] During the starting process of the shield machine, in order to ensure the construction of the warehouse under the muddy water pressure, prevent muddy water from entering the shield working well from the ring-shaped building gap formed by the door ring and the shield casing, which will affect the muddy water pressure on the excavation surface of the shield machine and the opening. For the stability of the excavated surface soil and the construction of shield tunneling, a good sealing device must be installed at the portal before the shield tunnel starts. The diameter of the sealing steel of the exit gate of the super-large shield tunnel is 15.2m, and there are five sec...

AI Technical Summary

Problems solved by technology

The disadvantages of this installation method are: the overall deviation is large after the hoisting and segmented installation, the installation accuracy is low, and the sealing effect is poor, which may easily lead to the risk of leakage of the shield tunnel construction mud

Especially after putting in the lower 4 sections of the steel ring, the fifth section at the top cannot be combined with the adjacent sections. It is necessary to adjust or even rework the installed sections, resulting in low installation efficiency

Under a special construction site, the hoisting equipment at the starting portal of the super-large shield tunnel does not have enough space for upward construction and extension, resulting in difficulties in installation and operation

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