Blast construction method of shallow-buried railway tunnel in underneath pass of civil house weak segments

Abstract

The invention discloses a blast construction method of a shallow-buried railway tunnel in underneath pass of civil house weak segments. The method includes the following steps that a, according to characteristics of the shallow-buried railway tunnel in underneath pass of the civil house weak segments, a numerical value model is established; b, material parameters corresponding to the numerical value model of the shallow-buried railway tunnel in underneath pass of the civil house weak segments are selected; c, blasting simulation of the shallow-buried railway tunnel in underneath pass of the civil house weak segments is performed; d, numerical value simulation results of different cutting blasting modes are analyzed; e, in combination with engineering measured data of blasting constructionfor the shallow-buried railway tunnel in underneath pass of the civil house weak segments, verification is performed so that the demands of blasting safety vibration control standards can be met. By the utilization of a power finite element method, numerical value simulation analysis is performed to research the rule of a blasting seism, verification is performed in combination with the engineering measured data, and therefore blasting vibration is reflected accurately to a certain degree. The blasting vibration reduction effect of a vibration reduction technical scheme is researched, bases are provided for making a vibration reduction blasting scheme for the tunnel in underneath pass of dense civil houses, and influences on the rule of seismic wave propagation by excavation of the tunnelare researched.

Description

technical field [0001] The invention relates to the technical field of shallow-buried railway tunnel construction, in particular to a blasting construction method for a shallow-buried railway tunnel passing through a weak section of a residential building. Background technique [0002] The blasting construction of the shallow-buried railway tunnel passing through the weak rock section of the houses has a great influence on the ground vibration effect. In order to be able to control the blasting vibration intensity of shallow tunnels and ensure the safety of buildings and construction, it is necessary to determine the vibration parameters of seismic waves at different locations under different blasting conditions. It is blasting near area and full-face blasting construction. [0003] In order to study the laws of blasting seismic waves, the M.A. Sadovsky formula algorithm is more common. Estimation according to Sadovsky’s empirical formula requires a large amount of monitori...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a blasting construction method for a shallow-buried railway tunnel passing through a weak section of a private house to solve the problem of blasting construction of a shallow-buried railway tunnel passing through a weak section of a residential building under which the monitoring data is limited and it is difficult to ensure construction safety; according to Sadovsky's experience Estimated by Formulas to Meet the Technical Problems of Blasting Safety Vibration Control Standards

Images