A reaction force verification device suitable for large tonnage load boxes

Abstract

The invention belongs to the field of calibration of foundation pile detecting instruments in pile foundation engineering, and particularly discloses a counterforce calibrating device suitable for a large-tonnage load box. The counterforce calibrating device comprises a standard dynamometer, and a calibrating framework consisting of a top beam, a plurality of stand columns and a base, wherein the stand columns are non-rotating screws fixed on the base; the screws penetrate through the top beam; the screws, nuts forming screw rotation with the screws, and the top beam form revolute pairs; the load box, a pressure steel plate, a spherical segment-shaped iron block, and a sensor part of the standard dynamometer are sequentially placed on the upper surface of the base from bottom to top; a spherical crown curved indent matched with the curved surface of the spherical segment-shaped iron block is formed in the center of the pressure steel plate; the sensor part of the standard dynamometer is in contact with the lower surface of the top beam. The counterforce calibrating device provided by the invention changes situations that the conventional large-tonnage load box calibrating device is heavy, cannot move, is difficult to achieve large-tonnage loading, low in efficiency and high in calibrating fee; the counterforce calibrating device has the advantages of high convenience for use, detachability and transferability, small occupied area and the like, and can effectively improve the calibrating efficiency.

Description

technical field [0001] The invention relates to a detachable counter force loading verification device, which is mainly used for the verification of large-tonnage load boxes. Background technique [0002] The self-balancing method load cell technology is developing rapidly at present. According to the characteristics of the self-reflexive force technology for measuring piles, few load cells are used for the detection of smaller tonnage pile foundations. The thrust of a load box with a larger tonnage can easily be thousands of tons. In fact, few measurement units have such a capable reaction frame. The load tonnage of domestic calibration equipment is limited (there are few pressure calibration equipment greater than 15000kN in China). Even if there are, few pile foundation inspection units can bear the expensive calibration costs and increase the verification cost. Contents of the invention [0003] The object of the present invention is to: aim at the above-mentioned exi...

AI Technical Summary

Problems solved by technology

The load box with a larger tonnage has a thrust of thousands of tons. In fact, few measurement units have such a capable reaction frame. The load tonnage of domestic calibration equipment is limited (there are few domestic pressure calibration equipment greater than 15000kN)

Even if there are, few pile foundation inspection units can bear the expensive calibration costs, which will increase the cost of verification

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