A non-metallic anti-floating bolt creep test loading device

Abstract

The invention belongs to the technical field of in-situ test equipment and relates to a creep test loading device for a non-metal anti-floating anchor. An anchor body is of a solid rod-shaped structure and is bonded with a steel casing pipe. H-shaped steel is perpendicular to a concrete cushion layer and is symmetrically arranged on the two sides of the anchor body. A counterforce beam is a box-type section formed by welding two pieces of H-shaped steel. The counterforce beam is provided with a steel base plate. The steel base plate, a penetrating jack, a spring, a steel plate, an anchor cable axial force meter and an anchorage device are stacked on the counterforce beam and arranged outside the steel casing pipe in a sleeved mode. The anchorage device is welded to the outside of the steel casing pipe. A dial indicator is arranged on L-shaped organic glass in an erecting mode. The L-shaped organic glass is arranged on the interface of the concrete cushion layer and the anchor body. A magnetic indicator base of the dial indicator is arranged on a standard beam arranged on a concrete buttress. The concrete buttress is arranged on the concrete cushion layer. The creep test loading device is simple in overall structure, convenient to install, high in testing precision and high in operability.

Description

Technical field: [0001] The invention belongs to the technical field of in-situ test equipment, and relates to a non-metallic anti-floating anchor rod creep test loading device, which is used for measuring and analyzing the creep deformation of the non-metallic anti-floating anchor rod. Background technique: [0002] With the development and utilization of urban underground space, the buried depth of building foundations continues to increase, and the problem of anti-floating has become more and more prominent. The bolt has the advantages of strong stratum adaptability, distributed stress, convenient construction, cost saving, and large bearing capacity in hard rock and soil layers. The emergence of glass fiber reinforced polymer (GFRP) bolts has added new means to rock and soil anchoring, especially the excellent corrosion resistance and anti-electromagnetic interference characteristics of GFRP materials, which have solved the problems that plagued the rock and soil anchori...

AI Technical Summary

Problems solved by technology

In the prior art, the design of anchors is more concerned with the pull-out force of the anchor, that is, the displacement behavior of the anchor, and seldom cares about the time-effect behavior of the anchor. The design of permanent anchors is often carried out by increasing the safety factor, which brings There is a lot of blindness; under the long-term tension of the anchor, the loss of anchoring force is caused by creep deformation, and the relationship between its deformation and time is called the creep of the anchor, and the creep of the anchor is reflected by the creep coefficient At present, in engineering, more basic tests on anchors have been done, and less creep tests have been done. However, the long-term pull-out resistance of anchors is of great concern to engineers and technicians, especially in the design of permanent anchors. , the field anchor creep test is very important to study the time effect characteristics of anchor pullout, long-term pullout resistance is an essential parameter of permanent anchor, therefore, seek to design a non-metallic anti-floating anchor creep test The loading device has very important social and economic significance for determining the long-term pull-out capacity of the anchor and studying the time-effect characteristics of the pull-out of the anchor

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