摘要
为探讨锚杆和土体的相互作用特征,研究了锚杆单元的数值实现方法及其正确性。首先,探讨了土锚相互作用机制,建立了锚杆单元的数值实现方法;然后,进行锚杆锚固力的现场试验监测,得到锚杆锚固力随时间的变化过程,并将现场试验结果与数值模拟结果进行对比。结果表明,①随下部土方开挖,锚杆锚固力不断增加,土方开挖到底后,锚固力基本趋于稳定;②数值计算得到的最大锚固力为259.0kN,试验结果为229.4kN,二者差别较小,且数值计算得到的锚固力随时间变化规律与试验得到的结果较为相近,验证了数值模型的正确性。
The characteristics of soil-cable interaction as well as the numerical realization of the cable element and its validation are studied in this paper. The mechanism of the soil-cable interaction is analyzed and the numerical modeling is done for the cable element. In situ-monitoring tests are carried out to obtain the reinforcement force of the cable, the numerical calculation model is built for the reinforcement force and the results are compared. It is shown that （1） with the time, the reinforcement force of the cable increases gradually until the excavation of the foundation is finished, and then the reinforcement force will tend to be constant; （2） the maximum reinforcement force from the numerical calculation is 259.0kN and that from the in situ-test is 229.4kN, and similar relations between the reinforcement force and time are obtained. The analysis results validate the numerical model.
出处
《科技导报》
CAS
CSCD
北大核心
2010年第3期66-69,共4页
Science & Technology Review
基金
国家自然科学基金项目(50878212)
关键词
土锚特征
锚杆
数值模拟
现场试验
soil-cable characteristic
cable
numerical modeling
insitu-test
