Mechanical type multiple-point displacement gage

Abstract

The invention discloses a mechanical type multipoint extensometer, which comprises an orifice reading machine, an orifice reference plate, an indium wire, and an anchoring head for point measurement inside a pore. The orifice reference plate is fixed on the pore wall with an expansion bolt, a pilot pin at the bottom plate of the orifice reading machine is inserted into the locating hole in the orifice reference plate, the orifice reading machine is fixed in the orifice reference plate, one end of the indium wire is fixed on a fastening bolt of anchoring head for point measurement inside a pore, the other end of the indium wire is fixed passed through a center hole of the orifice reference plate and fixed on a conical clip with point measurement marks, and the conical clip with point measurement marks is connected with a conical hanger of the orifice reading machine. The invention has the advantages of simple structure, large measurement range, easy operation, rapid anchoring, and reliable performance; and is suitable for point measurement in a pore with different bore sizes.

Description

technical field [0001] The invention belongs to a measuring instrument, and more specifically relates to a mechanical multi-point displacement meter, which is mainly used for measuring the deformation of deep rock formations of surrounding rocks in underground engineering construction, and provides accurate and effective information for information construction. technical background [0002] In construction projects such as tunnels, underground roadways, slopes, and underground powerhouses, engineers and technicians often need to understand the deformation of the deep rock formations in the surrounding rocks and their temporal and spatial changes during the construction process, so as to judge the rationality of the construction plan and guide subsequent construction. . On the other hand, in addition to the influence of construction factors, the displacement of the deep rock formations in the surrounding rock is also related to the structure and strength of the surrounding r...

AI Technical Summary

Problems solved by technology

The multi-point displacement gauge is mainly composed of the orifice reading device and the anchoring device for the measuring point in the hole. At present, there are many anchoring methods for the measuring point in the hole. Use grouting or anchoring agent to bond the anchorage of the measuring point in the hole. These anchoring methods are often restricted by site conditions, making operation inconvenient, installation difficult, and anchorage strength unreliable

Some orifice reading devices are measured with a ruler, and some are electronic. These measurement methods often cannot meet the needs of engineering measurement due to defects such as large errors, low precision, instability, poor anti-interference ability, and small range.

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