A force measuring structure and method for testing shield cutter cutting plastic drainage plate

Abstract

The invention discloses a force-measuring structure for testing shield cutters cutting plastic drainage boards, comprising: a machine base, a steel beam, a load sensor, a plastic drainage board, and a steel ring of a geotechnical box; the steel beam is fixed on the machine base Above; the plastic drainage board is distributed in the steel ring of the geotechnical box, one end of the plastic drainage board is fixedly connected to the steel ring of the geotechnical box through a fixing fixture, and the other end is fixedly connected to the steel beam through a load sensor. The force-measuring structure can obtain the pulling force on the plastic drainage board when the shield cutting tool cuts the plastic drainage board through the load sensor at the free end of the plastic drainage board. The pulling force on the drainage board can provide a reference for shield tunneling construction, which can avoid pulling the drainage board outside the excavation range of the shield tunnel into the excavation area during construction, and effectively prevent formation instability accidents. The invention also discloses a force measuring method for testing the plastic drainage plate cut by the shield cutter.

Description

technical field [0001] The invention relates to the technical field of shield tunneling, in particular to a force-measuring structure and method for testing shield cutters cutting plastic drainage boards. Background technique [0002] Shield tunneling is an advanced construction machine used for rapid construction of tunnels. With the continuous increase of domestic subway tunnel projects, the working conditions of shield tunneling construction are becoming more and more complicated. [0003] In view of the working condition of the shield crossing the soft soil roadbed of the expressway, the shield excavation needs to remove the vertical plastic drainage board group used at the roadbed during the construction of the soft soil layer. If the pulling force of the shield cutter on the drainage board is greater than the friction between the drainage board and the formation when the shield cutter breaks the drainage board, the drainage board outside the excavation range of the shi...

AI Technical Summary

Problems solved by technology

If the pulling force of the shield cutter on the drainage board is greater than the friction between the drainage board and the formation when the shield cutter breaks the drainage board, the drainage board outside the excavation range of the shield may be pulled into the excavation area during shield construction, resulting in loss of formation. Steady, subsidence of expressway road surface

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