Expressway ground surface settlement monitoring point and device

Abstract

An expressway ground surface settlement monitoring point is characterized in that a total station arranged at the central road sign of an expressway and beside the road emits light, the light is reflected by the monitoring point and then returns to the total station, the monitoring point comprises a tempered glass base body, a base buried underground and a hemispherical protrusion integrally formed on the base and exposed out of the ground surface; the Porro prism is arranged in the base, the included angle between the central axis L1 of the Porro prism and the perpendicular bisector of the base is recorded as R1, the relational expression that R1 is larger than or equal to 10 degrees and smaller than or equal to 80 degrees is met, and light rays emitted by the total station are emitted into the Porro prism of the base through the hemispherical protrusion and return to the total station after being totally reflected by the Porro prism. The Porro prism is arranged in the toughened glass base body and is arranged at the central road sign of the expressway, and the road settlement is monitored by the light emitted by the total station on the roadside, so that a user is prevented from entering the expressway to set a monitoring point, and the potential safety hazard is reduced. And the influence on the normally running vehicle in the monitoring process is avoided.

Images