A method for determining the minimum buried depth of underwater tunnels

Abstract

The invention discloses a method for determining the minimum buried depth of an underwater tunnel. The method comprises the steps that the influences of a reinforcing scheme in the designing process of the underwater tunnel and a construction segment partition scheme in the construction process on the tunnel buried depth are considered; firstly, the vertical section of the tunnel is preliminarilydetermined according to the wiring conditions at the two ends of an underwater tunnel project and the route slope, then a crucial section of the tunnel is selected, the crucial section under the condition that reinforcement is conducted is calculated, and therefore the minimum buried depth of tunnel construction safety is ensured; and meanwhile the water seepage amount in the operational period after the tunnel is reinforced is calculated, and when the water seepage amount obtained through calculation is smaller than a water seepage amount control standard in the tunnel operational period, thedetermined buried depth is the minimum buried depth of the tunnel. When the minimum buried depth of the tunnel is determined, all crucial sections of the whole tunnel all need to meet the requirements of the minimum buried depth, and the method can further appropriately reduce the project construction cost under the premise that the tunnel construction safety is ensured.

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 , the pumping and drainage costs of the tunnel during the operation stage will also increase sharply. [0003] At present, the...

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Problems solved by technology

[0021] The technical problem to be solved by the present invention is to provide a method for determining the minimum burial depth of underwater tunnels in view of the deficiencies in the prior art, which overcomes the problem that the determination of the minimum burial depth (thickness of the covering layer) of the existing underwater tunnels only considers the tunnel surrounding rock itself. Intensity, it is difficult to consider the defects of tunnel reinforcement measures and construction schemes that affect tunnel construction safety and buried depth determination

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