Rammed earth historic site group anchorage pullout test system

Abstract

The invention discloses a rammed earth historic site group anchorage pullout test system. The rammed earth historic site group anchorage pullout test system comprises a group anchorage anchoring mechanism, a loading mechanism and a data acquisition and processing system; the group anchorage anchoring mechanism comprises a rammed earth box, a rammed earth layer is rammed in the rammed earth box, a plurality of anchoring holes are formed in the rammed earth layer, and the plurality of anchoring holes are uniformly and equidistantly arranged relative to the central axis of the rammed earth layer; an anchoring rod is arranged in each anchoring hole, and anchoring slurry is arranged between the anchoring rod and the anchoring hole; the rammed earth box comprises a box seat and a plurality of box units which are vertically arranged above the box seat, each box unit comprises four channel steels which are arranged in a rectangular shape, and two adjacent channel steels are fixedly connected with each other by virtue of a locking device; and the loading mechanism applies a pulling force to the anchoring rods, and an anchoring force and stress and displacement of the anchoring rods are monitored by virtue of the data acquisition and processing system.

Description

technical field [0001] The invention belongs to the technical field of anchorage for reinforcement of rammed earth relics in the protection of cultural relics, in particular to an anchor pullout test system for rammed earth relics. Background technique [0002] As an important building type in ancient China, rammed earth ruins have continued to this day. Due to the serious threat of natural environmental factors and human activities for many years, a variety of geological disasters have appeared on the body and carrier of rammed earth ruins. Fissures cut the rock and soil mass into many dangerous soil bodies of different sizes, especially the fissures parallel to the body of the site cut the soil mass, causing toppling and collapse, and causing serious damage to the earthen site. Based on the principle of "not changing the original state, minimal intervention, and using appropriate protection technology" in the protection of cultural relics, in the protection and reinforceme...

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Problems solved by technology

[0003] The current research results of the existing single-anchor pullout test system cannot reflect the stress mechanism of multiple anchors in the rammed earth site, the average single anchorage force and the empirical anchorage design method, there are "over-reinforcement or insufficient reinforcement" For example, in the design of group anchors in geotechnical engineering, there are clear design methods for bolt length, bolt spacing, bolt edge distance, and bolt quantity, but the existing design methods are not suitable for rammed soil. ruins

Improper reinforcement design changes the stress distribution of rammed earth sites, causes new damage to rammed earth sites, and seriously restricts the scientific anchorage design of rammed earth sites

[0004] For the evaluation of the anchoring effect of rammed earth ruins, considering the value of the ruins, the indoor full-scale physical simulation pull-out test is still the most intuitive and reliable test method, but the existing single-anchor pull-out test cannot truly reflect the effect of group anchors

At present, in the research field of anchor reinforcement of rammed earth ruins, there is no indoor simulation test system related to group anchor pull-out test, which requires urgent research and development of this blank

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