The Influences of Bladder Properties on the Working Performance of the Multibladder‐Type Inflatable Anchor

Abstract

Due to the high bearing capacity and better controllability of bladder parameters, the multibladder-type inflatable anchor shows a great application prospect in the engineering construction in soft soil areas. In this study, based on a soft soil foundation pit project in Guangzhou Province, China, the multibladder-type inflatable anchor was applied to the engineering practice for the first time, and the working characteristics of the multibladder-type inflatable anchor were analyzed and discussed through field experiments. Primarily, the optimization design and experimental facility of the multibladder-type inflatable anchor were introduced in detail to realize the refinement and perfection of the anchorage technological process. Besides, the influence degrees of the bladder number, diameter, thickness, space, and length on the bearing characteristics and deformation control of the anchor were studied by using the control variable method, as well as the influencing mechanisms. Subsequently, the advantages of the multibladder-type inflatable anchor were presented by comparing its anchoring efficacy with that of the traditional grouting anchor. Ultimately, the analysis results were used to verify the reliability of the multibladder-type inflatable anchor and provide the experimental basis for its popularization and application.

Behavior of bladder-type inflatable anchors in sand: Physical modeling

“…The anchor we used, with 10 mm between bladders, 22 and our experiment are based on a research paper by Peng Wenxiang, “Model Test Study on Bladder-type Inflatable Anchor.” 22 The aim of choosing 10 mm between two 5 mm bladders was to make it possible to more easily compare our results with the 10 mm single-bladder anchor. The embedded depth values refer to the theory of sliding surface in soil mechanics, it is based on the sliding surface and the free section of the anchor.…”