A construction method for shield tunneling in composite strata

Abstract

The invention discloses a shield tunneling construction method of a composite stratum; the method includes step 1, geological survey of composite stratum; step 2, selection of a shielding cutter according to the geological condition of the composite stratum; step 3, selection of shield tunneling construction mode according to the geological condition of the composite stratum; step 4, selection of shield tunneling parameter according to the geological condition of the composite stratum, wherein the step 4 includes step 401 of calculating push force of a shield tunneling machine; step 402 of calculating torque of the shield tunneling machine; step 5, shield tunneling construction, wherein the step 5 includes step 501 of feeding back the shield tunneling direction; step 502 of adjusting the shield tunneling direction. The shield tunneling construction method is simple in structure and reasonable in design; according to the change of the composite stratum, the method can reasonably select the shield tunneling machine, correctly select the tunneling parameter, prolong the service life of a cutter disk, improve the adaptation of the cutter disk to the composite stratum, and guarantee the safe, rapid and economic performance of the shield construction; thus the method is good in using effect and convenient to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of tunneling construction methods, and in particular relates to a shield tunneling construction method for composite strata. Background technique [0002] In the hard rock construction of large-diameter shield tunneling, the reasonable design of the cutter head is a key factor to ensure the construction schedule and construction cost. The cutterhead cutter is the key component to achieve the functions of crushing and stripping rock and soil, dregs and soil flow, and interface support during the excavation process. The design technology of the cutter head is one of the core technologies of the earth pressure balance shield machine. Shield tunneling will encounter various strata in underground excavation, from silt, clay, sand to soft rock and hard rock, etc. Under complex ground conditions, the physical parameters of the medium change randomly and vary greatly, and coupled with multi-field coupling, The str...

AI Technical Summary

Problems solved by technology

The design structure of the cutterhead such as tool layout, cutterhead configuration, opening position, and opening ratio directly affects the heat generation, wear, cutting efficiency and reliability of the cutterhead tool, and the mutual restriction between the tool layout and the opening position increases the design of the cutterhead. difficulty

Images