黄土地层中预应力锚索锚固力试验与分析

在现场试验的基础上,通过系统分析试验数据,得出预应力锚索锚固力在黄土地层特定地质条件下的基本分布规律,为科学确定其锚固段长度提供了试验依据;通过实测和修正参数,推导出2种简单实用的锚固力计算公式,并将其理论解与实测值进行了对比分析,进一步验证了预应力锚索剪应力非均匀分布的实际状况,并指出在锚固长度小于工程临界锚固长度时剪应力均匀分布理论能较准确地计算锚索锚固力,为深入开展锚索支护的理论分析与工程设计提供了参考,在理论和工程实践上都是一种有益的探索。

Experiment and analysis on anchorage force distributing characters of pre-stressed cables

Based on the scene test , the fundamental dist ribut ion rule under loess st ratum specific geolog ical co ndit ion o f the anchor force was o btained thr oug h sy stemat ical analysis of the ex perimental data. It provided an exper imental basis fo r the scient ific determinat ion of anchor segment size. At the same t ime, tw o simple and pract ical formulas for calculat ing the anchoring force were deduced by making use of actual and revised parameters. Comparing the theoret ical solut ion w ith the measured data, it is v al idated that the shear st ress of the pre-str essed cable is not uniformly dist ributed. It is pointed o ut that w hen the leng th of the anchor is less than the critical length of the project anchor , the unifo rm dist ribut ion theory can calculate the cable anchor ing force relat ively accurately. The ex plor at ion prov ides a reference to in-depth theoretical analy sis and engineering design, w hich is useful in theor y and eng ineering pr act ice