The Research Of Pre-anchor Retaining Structure And Deep Foundation Model Test

With the growth of the national economy, the scale of the founder mental construction is gradually expanding, which results in the rapid development of the underground transport system. This paper, based on the engineering background of Shijiazhuang’s six-lane tunnel construction, aiming at the silty clay layer engineering geological conditions and the characteristics of bracing of large and deep foundation pit on the condition of loaded train, analyzes the load mechanic characteristics of the anchor rope under the effect of the long term static load and the vibrating load of the train in depth.In this paper, the theory analysis, similar model tests, and numerical simulation methods are used to deeply research the pre-stress of the anchor rope in the piled anchor envelop enclosure of the deep and large foundation pit. To summarize and analyze several research methods, such as the operating principle, the similar model test of the anchor rope and the numerical simulation test of the anchor rope and so on.To develop the model test during the process of the piled anchor envelope enclosure of the large foundation pit, revealed the variational regulation of the anchor rope’s load. To reveal the variational regulation of the axial force of the anchor rope under the condition of the train’s circulating load.To apply the numerical analysis in the process of the digging of the foundation pit, the creep analysis of the soil during the process of the static load and the effect analysis of the train’s vibrating load by using Fast Lagrange Analysis of Continua software FLAC3D.To get the variational regulation of the anchor rope pre-stress by analyzing the result of the axial force of the anchor rope in the model test and the numerical simulations tests. To provide references for the follow up studies.