Cross-cutting instrument sensor traction method in road broadening subgrade

Abstract

The invention discloses a cross-cutting instrument sensor traction method in a road broadening subgrade. The method comprises the following steps: firstly embedding an improved cross-cutting pipe according to the width of the broadening subgrade, mounting a fixed pulley at one side in the cross-cutting pipe close to an old subgrade; binding a cross-cutting pipe sensor on a dragging line of the cross-cutting pipe, drawing the dragging line, dragging the sensor in the cross-cutting pipe to one side close to old road subgrade; finally dragging a data transmission line in the sensor, dragging out the sensor in the cross-cutting pipe to an opening of the cross-cutting pipe, testing once per 50cm and recoding the result through the cross-cutting instrument; removing an adhesive tape for binding the dragging line and the sensor after measuring the data, buckling end covers on two ends of the cross-cutting pipe to finish once measurement; repeating above steps for several times. The difficulty that the cross-cutting pipe cannot be dragged into the pipe to test in the road broadening subgrade is avoided, and the technology support is provided for controlling subgrade settlement deformation in the road reconstruction and extension project.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a traction method of a cross-section instrument sensor in road widening subgrades. Background technique [0002] The cross section instrument belongs to a kind of instrument in the subgrade settlement observation, and the sensor and the cross section pipe belong to a kind of supporting equipment in the cross section instrument, wherein, the cross section pipe is buried at the bottom of the roadbed according to a certain method, in the prior art The cross-section pipe used is a PVC pipe with an outer diameter of 7.0cm, and the thickness of the pipe wall is 0.5cm. On the inner side of the pipe wall, there are four guide grooves symmetrically distributed for the sliding of the sensor guide wheel. The width of the guide groove is 0.6 cm, the depth of the groove is 0.3cm, and the schematic diagram of the cross-section pipe in the prior art is as follows figure 1...

AI Technical Summary

Problems solved by technology

[0006] However, in the roadbed widening project, when testing the settlement deformation of the widened roadbed, one end of the cross-section pipe (the side close to the old road) was filled with roadbed soil in the later stage of construction and was closed. When it is deformed, it is impossible to pull the traction line at one end of the cross-section pipe for testing, which will cause the cross-section instrument to be unable to be used in the newly filled roadbed in the road widening

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