The Application And Research Of The Anchor Technology For Ancient Earthen Construction Ruins

Earthen construction is a very important part of many ancient cultural heritages in our country,which construction materials are immature soil,rammed earth and adobe,and they are easily eroded by wind and easily collapsed in water.With the acceleration development of China's economic construction,urban development,the increasing scale of human destruction and unreasonable using has negative impact on ancient earthen construction ruins.At present, the conservation status of soil sites is generally poor,lacking of scientific protection.If it is not protected urgently,it would be faced the danger of disappearing forever.This article provided an overview for the research of reinforcement protection in the soil site,and it analyzed the main diseases of the famous earthen construction ruins——the Ancient City Ruins of Gaochang,which had collapsed.In order to radically cure the damage of collapse,according to the experiments and researches on the site,the paper introduced a reinforcement technology using a new type of bamboo anchor whipped by carbon fiber (BACF).The main contents of the study as follows:1.Through the real scene experiment,deformation mechanism and failure modes of anchoring body were studied under different conditions,such as anchorage length,anchor diameter,pore size,grouting materials,rib spacing,tilt angle and so on.Then basing on the analysis of the P-S graph under the force and the stress distribution along its length direction, anchoring mechanism of the system under this experiment was studied,and the effects of the above conditions on the anchoring force and stress distribution were revealed.2.Through the experiments for the bamboo on site,the interfacial cementing properties between the soil and the BACF were studied and analysis.The effect of the BACF on enhancing anchor force is studied.3.Within the situation of elasto-plastic,changing regular patterns of anchoring force is simulated with the load increasing by the finite element analysis software(ANSYS).Stress distribution of the anchoring at different anchorage length,bolt diameter and diameter ratio of grouting,strength of grouting body and surface state were also analyzed.4.Through experiments and finite element analysis,combined with the relevant standards and specifications,recommendations of design and construction on protection works of the Gaochang Ancient City Ruins are provided for reference of the construction application.