Shield tunnel linear pre-warning method

Abstract

The invention discloses a shield tunnel linear pre-warning method. The method includes the steps that 1, the actual cumulative rotating angle of a current pipe piece ring I is calculated; 2, the actual cumulative offset distance of the current pipe piece ring I is calculated; 3, the residual of the cumulative offset distance deviation is calculated; 4, the standard deviation of the residual of thecumulative offset distance deviation of each pipe piece ring is calculated; 5, the residual coefficient of each pipe piece ring is calculated; 6, the residual coefficient vibrating value is calculated; and 7, shield tunnel linear pre-warning is carried out. The included angle between the axes of every two adjacent rings of pipe pieces is calculated, the included angles are added up, the actual cumulative rotating angle of the current pipe piece ring is obtained, the actual cumulative offset distance of each ring of pipe pieces is calculated, the residual standard deviation and the residual coefficient of the cumulative offset distance deviation are obtained, the residual coefficient vibrating value is obtained, a shield tunnel linear pre-warning signal is given, data acquisition does notdepend on a total station, measuring cumulative errors are not generated, pre-warning is timely and efficient, the precision is high, and the accidents that the splicing route of shield tunneling pipepieces deviates seriously are reduced.

Description

technical field [0001] The invention belongs to the technical field of shield tunnel alignment early warning, and in particular relates to a shield tunnel alignment early warning method. Background technique [0002] During the advancement of shield construction, due to the influence of soil pressure on the excavation surface, surrounding rock pressure, stratum, and the level of shield machine operators, the actual assembly line shape of the shield segment will deviate from the original design line shape. This problem is also called the serpentine problem of shield tunneling. When the deviation is small, taking certain corrective measures in time can make the shield excavation meet the original design alignment requirements. However, when the deviation is large, there is no possibility of successful deflection correction of shield tunneling. This will cause the shield machine to fail to reach the receiving well according to the route, which will increase the workload, dela...

AI Technical Summary

Problems solved by technology

When it is found that the deviation exceeds a certain range, report to the superior competent department for processing. This method is subjective and delayed, and cannot properly handle the axis deviation state in a timely and efficient manner. At the same time, the measurement of data depends on the accuracy of the total station. If the control point accuracy of the total station is not enough or if there is an error in one measurement, errors will be introduced to all subsequent data, resulting in errors in the input data of the laser guidance system of the shield machine, and the guidance error of the laser guidance system of the shield machine without knowing it

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