深基坑工程中预应力锚索受力机制的研究

预应力锚索能充分发挥岩体的自承潜力,调节和提高岩土的自身强度和自稳能力,已经广泛地应用于边坡工程、基坑工程、地下工程等工程中。对于大部分预应力锚索,内锚固段是锚索的主要受力及传力部件,其受力机制主要体现在内锚固段的极限抗拔力方面。基于Hoek-Brown准则提出计算模型,并结合实际工程,对预应力锚索内锚固段受力机制进行研究分析。结果表明,当内锚固段尺寸及岩体参数一定时,极限抗拔力与灌浆压力呈线性相关。

A research on force mechanism of prestressed anchor cable in deep foundation pit

Prestressed anchorage cable can give full play to the self-supporting potential of the rock mass, to adjust and improve the geotechnical the strength and the ability of self-stabilization, has been widely used in engineering, excavation, underground construction projects. For most of prestressed anchor, anchor segment is the anchor cable force and power transmission components, the force mechanism is mainly reflected the anchoring segment, including the limits of anti-pulling force. Based on Hoek-Browm criterion computing model, we combined with practical engineering, research and analysis on the prestressed anchorage cable anchoring section force mechanism. The results show that when a certain anchoring segment size and rock mass parameters, the ultimate pullout force and grouting pressure was linearly correlated.