A fine detection method for existing tunnel structure deformation and displacement

Abstract

The invention discloses a method for finely detecting the deformation and displacement of an existing tunnel structure, comprising the following steps: arranging a detection section on the ground above the tunnel; arranging detection holes at intervals on the detection section; lowering an inclinometer pipe in the detection hole to the bottom of the hole; The inclinometer is used to measure the offset value of each measuring point in turn in the inclinometer tube; according to the offset value, the space measurement trajectory of the inclinometer, that is, the three-dimensional space trajectory of the detection hole, is obtained, and the detection hole hole is obtained according to the three-dimensional space trajectory. The three-dimensional space coordinates of the bottom of the bottom; the three-dimensional space trajectories of the detection holes located on the same section are all projected onto the detection section, and the tunnel burial depth and spatial position corresponding to the positions of the detection holes are obtained on the detection section, and on the detection section Fit the outer contour of the tunnel to obtain the outer contour and shape of the tunnel. The advantages of the invention are: on the basis of the drilling and exploration, the detection of the inclination of the measuring hole and the corresponding data correction calculation process are added, the detection error is greatly reduced, and the detection accuracy is improved, and the accuracy of the underground tunnel structure can be obtained through fitting calculation. Position, profile and deformation.

Description

technical field [0001] The invention relates to the technical field of detection of underground structures, in particular to a fine detection method for structural deformation and displacement of existing tunnels. Background technique [0002] For large buried deep tunnels and pipes and culverts, non-destructive testing techniques such as ground penetrating radar and seismic wave method can only detect their approximate positions, and there are certain errors, making it difficult to obtain their precise buried depth and plane position. Exploring methods such as drilling and static penetrating sounding only judge the buried depth of structures based on the drilling depth of the drill pipe. In this case, the penetrating depth obtained is the real buried depth only when the penetrating pipe is completely vertically downward. However, in practical applications, due to many uncontrollable factors such as weak and uneven formations and the difficulty of accurately leveling the dri...

AI Technical Summary

Problems solved by technology

Therefore, judging the burial depth only by the footage of the drill pipe, the burial depth error will be uncontrollable, and it is difficult to obtain the exact position of underground structures such as tunnels, let alone their subtle deformation and displacement.

Images