软土地层锚固及其锚筋回收机理的研究与应用

发布时间：2018-08-27 09:13

【摘要】：我国经济的腾飞给了锚固技术的发展一个重大机遇,岩土锚固技术也面临着节能环保和城市规划可持续的双重要求,岩土锚固技术研究迫在眉睫。论文对软土锚固技术进行了综述,详细分析了可回收锚杆的性能影响因素,对一种新型的解锁型可回收锚杆进行了试验研究。这种可回收锚筋的加劲锚桩通过扩大底部桩体直径和应力分散,使其在软土地层能提供较高的锚固力,双锚盘双锚索(Φ15.2)的锚桩最大锚固力达到了 440kN;锚筋回收率高,最高可以达到100%,被回收的锚筋可以再次使用,充分高效利用了资源且克服了以往锚索对后期开发地下空间产生的障碍,实现了可持续发展;还有锚杆的施工效率高,人工劳动强度小,可回收的锚杆施工并没有带来太多的复杂施工程序,且回收方法巧妙,减少了人力物力成本。根据施工过程和试验结果分析,看到了这种可回收锚杆的诸多优势,也提出了一些改进建议。施工和回收过程中需要多加注意,如防止隔离套管损坏,锚筋防止被作业机械损伤等;对多锚盘的锚桩锚盘开孔和锚盘布置方法提出了新方案。这种新型的解锁型可回收锚杆工程应用性强,适合在软土地区和有回收锚筋需求的工程项目大力推广。
[Abstract]:The rapid development of China's economy has provided a great opportunity for the development of anchorage technology. Geotechnical anchorage technology is also facing the dual requirements of energy-saving, environmental protection and sustainable urban planning. Geotechnical anchorage technology research is imminent. This paper summarizes the soft soil anchorage technology, analyzes in detail the performance of recyclable anchor factors, and a new type of anchor. This kind of reinforced anchor pile can provide higher anchoring force in soft soil by enlarging the diameter and stress dispersion of the bottom pile. The maximum anchoring force of the anchor pile with double anchor plates and double anchor cables (15.2) reaches 440 kN, and the recovery rate of anchor bars is high, up to 100%, which is recovered. Anchor bars can be reused, fully and efficiently utilizing resources and overcoming the obstacles of the previous anchor cables to the later development of underground space, achieving sustainable development; and the construction efficiency of the anchor bar is high, labor intensity is small, recyclable anchor construction does not bring too many complex construction procedures, and the recovery method is ingenious, reducing the number of people. According to the analysis of construction process and test results, the advantages of this kind of recoverable anchor rod are found, and some suggestions for improvement are put forward. More attention should be paid to the construction and recovery process, such as preventing the damage of insulating sleeve, preventing the anchor bars from being damaged by operation machinery, etc. This new type of unlockable and recyclable anchor bolt has strong engineering application, and is suitable for popularizing in soft soil area and engineering projects which need recycled anchor bars.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU753.8

【参考文献】