条形基础下水平布置纤维增强聚合物筋材地基试验研究

纤维增强聚合物(FRP)具有耐腐蚀、耐水、耐高温、高强度、高弹性模量、质量轻等优点,将其用作加筋材料不仅能显著提高加筋地基的加筋效果,还能有效解决传统加筋材料的耐久性问题。分别对纯砂和5种水平加筋方式进行了加筋地基模型试验,测试了各级荷载下的地基沉降、FRP的应变及土压力数值,并初步探讨了FRP加筋的作用机制。试验结果表明,加筋能显著提高地基承载力和减小地基沉降,特别是双层水平加筋方式的加筋效果更加明显,而锚固件的设置对加筋效果的影响并不大,水平FRP筋材主要起到了土压力扩散作用。

An experimental study of strip foundation on the grounds reinforced with horizontal FRP

Fiber reinforced polymer (FRP) has good performance such as corrosive resistance, water resistance, high temperature resistance, high strength, high elastic modulus, light weight and so on. FRP materials can be used to enhance reinforcement effects significantly and improve durability of traditional reinforcements. A series of tests was conducted on pure sand and five types of horizontal reinforcement. Settlement, FRP strain and earth pressure were measured under different load levels, and the mechanism of FRP reinforcement was discussed. The testing results show that reinforcement can significantly improve the bearing capacity of the ground and reduce the settlement of foundation. In particular, the effect of double-layered horizontal reinforcement is pronounced, while the influence of anchor installation on the reinforcement is insignificant, and the horizontal FRP reinforcement mainly contributes to distributing the earth pressure.