This paper describes an investigation into the performance and pull-out capacity of a bladder-type inflatable anchor. The inflatable anchor is a type of support member used in foundation pit support engineering. Based on improvements and innovations, the multi-bladder-type inflatable anchor consists of two or more hydraulically inflated rubber membranes that are embedded in unconsolidated earth and then inflated to provide pull-out capacity. The primary objective of this study was to investigate the impact of inflation pressure, embedment depth, number of bladders, bladder length, and rubber film thickness on the pull-out capacity and displacement of the inflatable anchor. The tests were carried out in a cylindrical steel test chamber filled with medium coarse sand. The pull-out behavior of the bladder-type inflatable anchor and the five variables was investigated, and the benchmark values for all tests are determined by similarity ratio. Compared with the single bladder inflatable anchor, under the same conditions, the ultimate pull-out capacity of the two bladder-type inflatable anchor is 1.2 times higher, with ultimate displacement only 37.5% of the former, the ultimate pull-out capacity of the three bladder-type inflatable anchor is 1.7 times higher, with ultimate displacement only 32.3% of the former. The two bladder-type inflatable anchor is superior to the single bladder inflatable anchor and the multi-bladder-type has higher ultimate pull-out capacity and greater stiffness. The inflation pressure and the rubber film thickness have a significant influence on the bearing capacity. The number of bladders effectively controls the ultimate displacement.

本文描述了对气囊式充气锚的性能和拉拔能力的研究。充气锚杆是基坑支护工程中使用的一种支护构件。基于改进和创新，多囊式充气锚由两个或多个液压充气橡胶膜组成，这些橡胶膜嵌入松散土中，然后充气以提供拉拔能力。本研究的主要目的是研究充气压力、嵌入深度、气囊数量、气囊长度和橡胶膜厚度对充气锚的拉出能力和位移的影响。试验在装有中粗砂的圆柱形钢试验室中进行。对囊式充气锚的拔出行为和五个变量进行了研究，并通过相似比确定了所有测试的基准值。与单囊式气胀锚相比，同等条件下，两囊式气胀锚的极限拉拔能力提高了1.2倍，极限位移仅为前者的37.5%。三囊式充气锚则高出1.7倍，极限位移仅为前者的32.3%。二囊式气胀锚优于单囊式气胀锚，多囊式具有更高的极限拉拔能力和更大的刚度。充气压力和胶膜厚度对承载能力有显着影响。气囊的数量有效地控制了最终的位移。