Simple monitoring device for earth surface cracks

Abstract

The invention discloses a simple monitoring device for earth surface cracks. The device includes a convergence instrument, a geological compass and two fixed rods, the two fixed rods are located at two sides of an earth surface crack, and a connecting line of the two fixed rods is vertical to an earth surface crack trend; hooks on two ends of the convergence instrument are hung on the tops of the two fixed rods, and the geological compass is close to a steel ruler of the convergence instrument too measure an azimuth angle of the connecting line of the fixed rods; the fixed rods adopt hollow stainless steel tubes, reflective paints are painted on surfaces of upper parts of the stainless steel tubes, and tail ends of the stainless steel tubes are diagonal planes convenient to insert in soil mass; the stainless steel tube and an edge of the earth surface crack of the same side have an interval of at least 1m; the tops of the stainless steel tubes are 0.3 to 0.7m from an earth surface; and the hook of one end of the convergence instrument is extended through a connecting rod. The simple monitoring device for earth surface cracks only needs to firmly hammer the stainless steel tubes into the soil mass, and thus construction is very simple; and the device can be used repeatedly, thereby reducing monitoring cost.

Description

technical field [0001] The invention belongs to the field of surface crack monitoring, in particular to a simple monitoring device for surface cracks. Background technique [0002] Landslide refers to the soil or rock mass on the slope, affected by factors such as river scouring, groundwater activity, earthquake and artificial slope cutting, under the action of gravity, along a certain weak surface or weak zone, the whole or scattered ground A geological phenomenon that slides downhill. Landslide disasters occur frequently in my country. According to statistics from the Ministry of Land and Resources of the People's Republic of China, there were 8,128 landslides in 2014, accounting for 74.5% of geological disasters, causing a large number of casualties and property losses. Due to the large number of landslide hazards and their extreme dispersion, it is impossible to control them all, nor can they all be monitored with professional monitoring equipment. Therefore, it is nece...

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Problems solved by technology

[0003] At present, the monitoring device widely used in group measurement and group defense is a simple monitoring pile with a gap-riding type. This simple monitoring pile is mostly made of cement and measured with a tape measure. It has the characteristics of fast investment and low cost, but its accuracy is difficult to guarantee, and the measurement data is inaccurate. And there is no monitoring of the dislocation of the cracks, the monitoring of the dislocation of the boundaries on both sides of the landslide is not reasonable enough, and the construction of the monitoring piles is also more troublesome, especially the concrete construction in mountainous areas is very inconvenient, and the concrete piles cannot be reused, resulting in a waste of resources

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