Field Test to Investigate Seismic Capacity of Pressure Grouted Anchors

本奖项根据AD/ENG通报第85-25号“小说研究加急奖励”的规定颁发。在世界上的地震活跃地区，已经建造了许多回墙（墙壁由杆或电缆捆绑或锚定到邻近的土壤上）。然而，对于这种类型的挡土结构，目前还没有普遍接受的抗震分析和设计方法。本研究项目考虑的情况下，墙壁与压力灌浆锚。一般认为，有灌浆压力的锚杆锚固能力明显高于无灌浆压力的锚固能力。虽然容量增加的原因尚不清楚，但有几种可能的解释。根据实际原因，地震地面震动的影响可能导致锚的强度损失。锚固能力的下降可能从微不足道到导致墙破坏的临界能力损失不等。本研究项目将探讨压浆锚承载力增加的原因，以及地震地震动对压浆锚承载力增加的影响。

This award is made according to the provisions in AD/ENG Bulletin No. 85-25, "Expedited Awards for Novel Research". Many tieback walls (the walls are tied or anchored by rods or cables to the adjacent soil) have been constructed in seismically active areas of the world. However there is no generally accepted method of seismic analysis and design for this type of retaining structure. This research project considers the case where the walls are tied with pressure-grouted anchors. It is generally recognized that anchors installed with grout pressure have significantly higher anchoring capacity than those installed without grout pressure. While the reason for the higher capacity is not well defined, there are several possible explanations for the increase. Depending upon the actual cause, the effect of earthquake ground shaking can lead to a loss in strength of the anchor. The decrease in anchor capacity may vary from insignificant to a critical loss of capacity leading to failure of the wall. This research project will investigate the cause of the increased capacity of pressure grouted anchors, as well as the effect of seismic ground shaking upon this increased capacity.