A tunneling method for mud-water balance shield machine

Abstract

The invention provides a tunneling construction method for a mud-water balance shield tunneling machine. The tunneling construction method for the mud-water balance shield tunneling machine comprisesthe following steps: the soil layer characteristics in a shield tunneling area are inspected; whether the soil layer characteristics are stable or not is judged, and if the soil layer characteristicsare not stable, a soil chamber pressure retaining system is stopped and all valves on a soil chamber air inlet pipeline are closed, so that a soil chamber is filled with mud, namely a normal tunnelingmodel is adopted; if the soil layer characteristics are stable, the soil chamber pressure retaining system is started and all the valves on the soil chamber air inlet pipeline are opened, so that theupper part of the soil chamber is filled with compressed air, and then cutterheads are washed through a mud feeding pipe at the upper part of the soil chamber. According to the tunneling constructionmethod for the mud-water balance shield tunneling machine, two kinds of tunneling modes, namely the conventional mode and the soil chamber air-adding mode, are adopted to make the washing effect of the cutterheads better, so that the difficult problem that the cutterheads are subjected to mud cake forming when the mud-water balance shield tunneling machine tunnels is in a viscous soil layer is solved effectively.

Description

technical field [0001] The invention relates to the technical field of a mud-water balance shield machine, and more specifically, relates to a tunneling method for a mud-water balance shield machine. Background technique [0002] With the rapid development of shield construction technology, the mud-water balance shield machine in the shield tunneling machine has been used in tunnel projects with high requirements for settlement such as river crossing, sea crossing and settlement due to its excellent pressure control performance. It is widely used. At the same time, its excavation characteristics also make it easy to form mud cake on the cutter head when excavating clay strata. In addition, the mud injected into the soil chamber through the soil chamber slurry inlet pipe directly rushes into the soil chamber mud. As a result, the flow rate slows down and the mud cake stagnated on the cutter cannot be effectively cleaned. This makes the shield tunneling machine have to interru...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an excavation method for mud-water balance shield machine, which adopts two excavation modes: conventional mode and soil cabin air filling, to realize alternate scouring of the outer peripheral area of ​​the cutter head, and significantly solve the cleaning effect of the cutter head Poor, mud cake problems

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