Design and calculation method for initial support of tunnel initial support bearing all design loads

A technology of initial support and design calculation, applied in the field of engineering calculation, can solve problems such as logic errors, destruction, and large safety hazards, and achieve the effect of clear correspondence
CN106529052AActive Publication Date: 2017-03-22CHINA RAILWAY 12TH BUREAU GRP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
CHINA RAILWAY 12TH BUREAU GRP
Publication Date
2017-03-22

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Abstract

The invention provides a design and calculation method for an initial support of a tunnel initial support bearing all design loads. The design and calculation method is characterized in that the initial support of the tunnel initial support bearing the all design loads is designed and calculated by adopting two methods, namely "two hinged arches + 2x2 chain poles + elastic resistance", and "two hinged arches + 10x2 chain poles"; the calculation of the method makes the "structure" completely correspond to the "loads", and makes the corresponding relationship between "measures" and "problems" established on site clearer, and the purpose is more explicit; the method adopts a force method to calculate, thus complete structural internal forces and a displacement function relationship can be obtained, and the change rule of the structural internal forces and displacement can be reflected explicitly; and besides, a familiar general theory is adopted, which can facilitate technical personnel on site to design and calculate the tunnel initial support, and provide a theoretical basis for the development of a construction plan.
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Description

technical field

[0001] The invention relates to the technical field of engineering calculation, and specifically designs a calculation method for the initial support design of a tunnel in which the initial support bears all the design loads, more specifically a structure for the initial support of a soft rock tunnel that bears all the design loads Mechanics force method design calculation method. Background technique

[0002] Practice has proved that the surrounding rock is in a loose state after excavation of soft rock tunnels, so the basic condition for the application of the "New Austrian Method" principle - the elastic-plastic condition of the surrounding rock is not met. Therefore, under the current technical conditions, soft rock tunnels, especially shallow tunnels, should not be designed and constructed using the "New Austrian Method" principle, but should be designed and constructed using structural mechanics in accordance with the "load-structure" model.

[0003] "...

Claims

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