Intelligent anchorage device and method for testing axial force of anchor rod by using intelligent anchorage device

Abstract

The invention relates to an intelligent anchorage device, which comprises anchor rings and a split type anchorage device body used for clamping an anchor rod steel strand, wherein the anchor rings comprise a first anchor ring and a second anchor ring, the first anchor ring and the second anchor ring are locked together through a connecting piece, an anchorage device mounting groove used for mounting the split type anchorage device body is defined by the first anchor ring and the second anchor ring, the intelligent anchorage device further comprises a strain gauges used for sensing the circumferential strains of the anchor rings, compensation gauges used for compensating strain difference caused by temperature, and a data collector, and the strain gauges are connected to the data collectorthrough conducting wires, and are fixed to the outer walls of the anchor rings in the circumferential directions of the anchor rings. The invention further provides a method for testing the axial force of an anchor rod by adopting the intelligent anchorage device. The intelligent anchorage device has the advantages of being simple in structure, convenient to operate and high in measurement precision.

Description

technical field [0001] The invention relates to an intelligent anchor and its method for testing the axial force of the anchor, which is applicable to the monitoring of the axial force of the anchor in all temporary anchoring projects. Obtain the axial force borne by the bolt. The invention can replace the traditional method of testing the axial force of the anchor rod by setting a dynamometer under the anchorage. Background technique [0002] In engineering construction, there are more and more geotechnical anchoring projects, and the reusability of related materials is of great significance for saving resources. In geotechnical anchoring engineering, due to the complexity of construction conditions, site environment, geological conditions, etc., the safety of the anchor rod is directly related to the safety and stability of the anchoring engineering. The most important indicator of bolt safety monitoring is the monitoring of bolt axial force. At present, the monitoring ...

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Problems solved by technology

At present, the monitoring of the axial force of the anchor is mainly by installing a dynamometer under the anchorage of the anchor head to monitor the axial force of the anchor. This existing method has two main disadvantages: (1) the dynamometer is very expensive, Generally, the market price of a dynamometer is 900-3000 yuan, or even more expensive; and the dynamometer is a one-time consumption product, and the number of anchor rods in an anchoring project ranges from more than a hundred to more than a thousand. It is difficult to monitor the axial force of a large number of bolts in batches, which leads to the fact that in actual projects, a few bolts in a column of 1-3 sections are mostly selected for monitoring, and what is the change of the axial force of most unmonitored bolts? Does the actual axial force exceed the design value? Is the actual axial force much lower than the design value? Is the axial force fluctuation abnormal? (2) The size of the dynamometer is large, especially the axial length is long, and it needs to occupy a certain clearance, resulting in the clear distance between the support pile or the support slope and the basement exterior wall. Increased, increasing the amount of earthwork excavation and prolonging the construction period

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