摘要
针对表层由薄粘土层覆盖的风化岩体输电线路地基,传统的原状土掏挖基础或岩石嵌固式基础均不能有效地发挥其功效,单独采用任何一种基础将不符合安全经济环保的要求,特将上述2种基础型式相结合,提出新型环保型复合式基础型式。选择典型场地进行原型试验,试验基础施工安全,坑壁稳定,根据试验结果,新型复合式基础充分发挥原状土和岩石地基的高承载、低变形的优势,并推导出新型复合式基础的抗拔承载力、抗倾覆承载力的计算公式,为新型复合式基础在输电线路杆塔基础中的应用提供技术资料。
With regard to the transmission line foundation for the weather rock with a thin surface of clay covered, the conventional undisturbed-soil digging foundation or the rock- embedded foundation often fails to function well, and adoption of either of the two foundations can hardly meet requirements for safe and economical operation or environment protection. This paper presents a new and environment-friendly composite foundation combining the aforementioned two foundations. The prototype test of this foundation is carried out on a typical foundation site to test the construction safety and stability of the pit wall and the test results indicate that this composite foundation is able to make full use of the high bearing and low distortion in both conventional undisturbed-soil digging foundation and the rock-embedded foundation. Calculation formulas are induced for the uplift bearing capacity and overturning bearing capacity for the new composite foundation and to serve as useful technical data in applying the foundation to power transmission lines.
出处
《电网与清洁能源》
2011年第1期20-24,共5页
Power System and Clean Energy
基金
国家电网公司科学技术项目输电线路新型环保基础研究(SGKJ[2007]1027)
关键词
输电线路
复合式基础
原型试验
抗拔承载力
抗倾覆承载力
transmission line
composite foundation
prototype test
uplift bearing capacity
overturning bearing capacity
