Early-warning and prediction method for sedimentation nearby tunnel construction working face

Abstract

The invention discloses an early-warning and prediction method for sedimentation nearby a tunnel construction working face. The early-warning and prediction method includes the following steps: collecting construction parameters, stratum parameters and ground surface sedimentation parameters in real time, setting up a database based on the construction parameters, the stratum parameters and the ground surface sedimentation parameters, obtaining the multiple ground surface sedimentation parameters corresponding to the same or similar stratum parameters and the same or similar construction parameters, carrying out fitting and regression analysis on the ground surface sedimentation parameters with the polynomial-included least square fitting algorithm and the algebra interpolation method, obtaining a longitudinal ground surface sedimentation prediction curve, according to the longitudinal ground surface sedimentation prediction curve, in cooperation with input soil body parameters and input tunnel radius, obtaining a transverse ground surface sedimentation prediction curve with the PECK formula, judging whether values represented by the longitudinal ground surface sedimentation prediction curve and the transverse ground surface sedimentation prediction curve exceed early warning values or not, and if the values represented by the longitudinal ground surface sedimentation prediction curve and the transverse ground surface sedimentation prediction curve exceed the early warning values, giving an alarm. According to the early-warning and prediction method, timely early warning and timely processing on the ground surface sedimentation caused by metro tunnel construction can be achieved, and therefore personnel and economic losses caused by the unreasonable construction process can be avoided.

Description

technical field [0001] The invention relates to a method for early warning and prediction of surface subsidence, which belongs to the technical field of rail transit safety construction, in particular to a method for early warning and prediction of subsidence near a tunnel construction work surface. Background technique [0002] At present, the construction methods used in the construction of urban rail transit projects mainly include open-cut method, mine method and shield method. Among them, the shield method is to use the shield machine equipment to cut and excavate the soil through the key equipment such as cutter head, jack and screw machine to realize the construction method of excavation; the mining method refers to the operation method of excavating underground tunnels. The basic principle of the construction method of constructing the tunnel is that after the tunnel is excavated, it is affected by blasting, causing the rock mass to rupture and form a slack state, wh...

AI Technical Summary

Problems solved by technology

Different geological structures require different support structures, resulting in complex support and high consumption of support materials

At the same time, during the construction process, due to unreasonable construction parameters, ground subsidence, building (structure) damage, pipeline breakage, etc. are caused, resulting in huge human and economic losses.

However, in the existing technology, there is no scientific and reasonable method for early warning and prediction of surface subsidence during tunnel excavation, which can realize timely early warning and prediction of subway tunnel safety.

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