Calculation method for determining safety and optimization of shaft lining

Abstract

The invention discloses a calculation method for determining safety and optimization of a shaft lining. The method is technically characterized in that (1) a shaft is divided into a plurality of segments; (2) surrounding rock vertical stress at the lowermost end of each segment of the shaft is calculated; (3) surrounding rock horizontal pressure borne by the shaft lining at the lowermost end of each segment of the shaft is calculated; (4) maximum supporting force provided by each segment of the shaft lining is calculated; (5) the safety coefficient of each segment of the shaft lining is calculated; and (6) parameters of each segment of the shaft lining are adjusted and optimized. Through the calculation method for safety and optimization of the shaft lining, the current situation that shaft lining design depends on norms or experience is changed, segmented judgment and optimization are performed according to shaft depths, different lining optimization parameters are adopted for the shaft at different depths, and therefore the method is beneficial for saving cost and lowering construction cost. The method can also be applied to safety and optimization of an inclined shaft lining.

Description

technical field [0001] The invention relates to the field of shaft support structures, in particular to a calculation method for determining the safety and optimization of shaft lining. Background technique [0002] In the construction of long tunnels, in order to speed up the construction progress, auxiliary passages are usually used, such as horizontal tunnels, vertical shafts, inclined shafts, parallel pilot pits, etc., that is, "long tunnels and short tunnels". For example, the Liuyang River Tunnel of Wuhan-Guangzhou Passenger Dedicated Line has a total length of 10115m, the initial mileage is DIIK1560+785~DIIK1570+900, and 3 vertical shafts + 1 inclined shaft are set. The central mileage of the 2# vertical shaft is DIIK1564+820, and the plane shape is Rectangular, with a clearance of 16.8m×8m and a depth of 53.85m, it is the deepest of the three shafts and is directly located on the centerline of the tunnel. A shaft is also installed in the Wushaoling Tunnel of the Lan...

AI Technical Summary

Problems solved by technology

For long shafts, a lining support parameter is adopted at the top and bottom of the shaft, which is obviously conservative and wastes materials

For the design of shaft lining parameters, at present, it is basically based on experience and specifications. Whether the lining design is reasonable or not, whether it is safe and economical, has not been considered too much

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