Method for determining minimum buried depth of underground tunnel based on engineering control measures

Abstract

The invention discloses a method for determining the minimum buried depth of an underground tunnel based on engineering control measures. According to the method, the influence on the buried depth of the tunnel due to the engineering control measures in the construction process of the underground tunnel is considered. The method comprises the following steps of: firstly, preliminarily determining the minimum buried depth of the tunnel according to wiring conditions at two ends of the underground tunnel; secondly, analyzing the safety in the tunnel construction process when conventional support parameters and construction parameters under the buried depth conditions; on the premise that the conventional support parameters do not meet the construction safety, further analyzing the construction risk of the tunnel under the conditions of different reinforcement measures and reinforcement parameters and determining the minimum buried depth for ensuring the construction safety of the tunnel under the condition of different engineering control measures; and finally, determining the optimally-reasonably buried depth of the tunnel on the basis of comprehensively comparing reinforcement expenses under the condition of different engineering control measures with reduced expenses caused by the reduction of the tunnel length due to the reduction of the tunnel buried depth.

Description

technical field [0001] The invention relates to a method for determining the minimum buried depth of an underwater tunnel, in particular to a method for determining the minimum buried depth of an underwater tunnel constructed by the underground mining method. Background technique [0002] The buried depth of an underwater tunnel has a great influence on the construction and operation of the project, and is one of the most important design parameters affecting the cost and safety of the tunnel. The greater the buried depth of the tunnel, the longer the wiring required on both sides of the tunnel, the sharp increase in project cost, and it is not conducive to the connection between the tunnel and the existing lines on both sides; the shallower the buried depth of the tunnel, the higher the risk of landslides and water inrush during tunnel construction . [0003] At present, there are mainly the following methods for determining the minimum buried depth of underwater tunnel ex...

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Problems solved by technology

[0012] The technical problem to be solved by the present invention is to overcome the current situation that the determination of the minimum buried depth (thickness of the covering layer) of the existing underwater tunnel only considers the strength of the tunnel surrounding rock itself, and does not consider the influence of engineering measures on the tunnel constructio

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