Movable inclinometer, and method for measuring horizontal displacement of stratum

Abstract

The invention discloses a movable inclinometer, and a method for measuring the horizontal displacement of stratum. The movable inclinometer comprises a measuring and reading instrument, a GPS position finder, an inclination measuring tube and an inclination measuring cable, the GPS position finder is connected with the top end of the inclination measuring tube, a movable probe is arranged in the inclination measuring tube, one end of the inclination measuring cable is connected with the measuring and reading instrument, the other end of the inclination measuring cable is connected with the movable probe, an accelerator chamber is arranged in the movable probe, an accelerometer sensor is arranged in the accelerometer chamber, and the movable probe ascends and descends along the inclination measuring tube under the driving of the inclination measuring cable. The method for measuring the horizontal displacement of stratum comprises the following steps: measuring the horizontal total displacement and the horizontal offset displacement by using the movable inclinometer, and calculating the horizontal displacement of the stratum according to obtained measured values. The movable inclinometer effectively shortens the boring depth, reduces the economy cost, solves the abuse of just working of previous inclinometers in a fixed hole measuring position under hypothesized conditions, allows measured data to accord with onsite practical conditions, and provides reliable basis for slope and ground pit support construction.

Description

technical field [0001] The invention relates to a movable inclinometer, in particular to a movable inclinometer and a method for measuring stratum horizontal displacement. Background technique [0002] The inclinometer is an instrument used to measure the top angle and azimuth angle of engineering structures such as boreholes, foundation pits, foundations, walls and dam slopes. The inclinometer mainly includes a probe guide wheel and an inclinometer probe. The guide wheel of the measuring head is settled or lifted along the guide groove of the inclinometer guide. The acceleration sensor in the inclinometer guide head can sense the inclination angle of the guide tube at each depth, output a voltage signal, and convert it into Horizontal displacement. [0003] Existing inclinometers are used to measure engineering practice on the premise that the position of the measuring hole remains unchanged. This measurement method does not take into account the movement and variation of ...

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Problems solved by technology

[0003] Existing inclinometers are used to measure engineering practice on the premise of assuming that the position of the measuring hole remains unchanged. This measurement method does not take into account the movement and variation of the stratum at a certain depth over time. The above-mentioned measurement method obtained The horizontal displacement obtained by data analysis is only a part of the actual horizontal displacement, which cannot fully and accurately reflect the characteristics of engineering practice. Correspondingly, in engineering practice based on this analysis result, there are potential engineering risks. In order to reduce the impact of stratum movement over time on measurement As a result, the position of the measuring hole is often obtained very deep, which not only increases the cost, but also cannot completely eliminate the influence of the horizontal displacement of the formation

Since active inclinometers are widely used in rock and soil slopes, building foundations, mines, excavation of foundation pits, internal horizontal displacement observations of underground structural engineering and subgrade section settlement observations, if the horizontal displacement of a certain stratum is too large, the engineering structure will be damaged. Destabilization and destruction will cause major national economic losses

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