Positioning method of secondary lining of tunnel

Abstract

The invention relates to a positioning method of a secondary lining trolley of a tunnel and belongs to the field of tunnel construction. The method aims at increasing a turnover utilization ratio of measurement equipment. The method comprises the steps of: step I: laying off tunnel survey line, step II: calculating distances L1, L2 and L3 from left side mold foot point, a right side mold foot point and a tunnel central line to a vertical plane where the tunnel survey line is located, step III: laying off a point A keeping the distance L1 to the tunnel survey line, a point B keeping the distance L2 to the tunnel survey line and a point D keeping the distance L3 to the tunnel survey line on an inverted arch filling surface on the same mileage section, and step IV: measuring actual elevationsof the point A and the point B, obtaining relative elevations of the point A and the point B, and moving the secondary lining trolley in place. According to the method, the measurement equipment suchas a total station is not required to be used in the step of adjusting the secondary lining trolley in place; therefore, the total station can be moved to other required positions in the process; thetotal station can also be mounted at one time for survey and laying-off of several mileage sections; the turnover utilization ratio of the total station is increased; and the measurement equipment such as the total station and measurement personnel are made full use of.

Description

technical field [0001] The invention belongs to the field of tunnel construction, in particular to a method for positioning a trolley for secondary lining of a tunnel. Background technique [0002] At present, there are many positioning methods for the tunnel secondary lining trolley. At present, the commonly used methods are as follows: First, find out the theoretical contour point on the tunnel arch contour and the secondary lining trolley corresponding to the theoretical contour point through the construction drawings. Lining the contour points of the trolley; then, set up the total station, and use the total station to measure the actual contour points corresponding to the theoretical contour points on the tunnel arch contour; finally, use the total station to guide and adjust the secondary lining platform Car, so that the contour points of the secondary lining trolley and the actual contour points of the tunnel are aligned. However, this method has the following disadv...

AI Technical Summary

Problems solved by technology

However, this method has the following disadvantages: that is, it is necessary to wait for the secondary lining trolley to be adjusted in place before dismantling, which leads to insufficient use of tunnel construction measurement equipment and personnel on the one hand, and insufficient tunnel construction measurement equipment and personnel on the other hand Need to increase equipment and personnel, increase construction cost

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