青海地区微型桩杆塔基础应用分析及关键技术

Application Analysis and Key Technology of Micropiles for Transmisson Tower in Qinghai Province

分析了青海地区的工程地质条件,研究了微型桩杆塔基础的关键技术在青海地区的应用可行性。研究表明:青海地区软土地基大部分分布于盐碱地,具有较强的盐腐蚀性,微型桩基础目前还没有很好的抗腐蚀措施,因此不建议采用微型桩杆塔基础;黄土地基中采用微型桩基础具有较好的经济和环境效益,可以在黄土地基中采用微型桩杆塔基础。分析了可供在黄土地基中选用的微型桩杆塔基础形式和应用关键技术,并通过实例计算对微型桩杆塔基础在黄土地基中应用的经济性进行了评价。

Based on the analysis of the engineering geological conditions in Qinghai Province, the application feasibility and key technology of micropiles for transmission tower are studied. It is shown that soft ground is mainly located in alkaline land with a strong salt corrosion, and there are not good corrosion protection measures for micropiles foundation, so micropiles foundation is not suitable in soft ground. However, micropiles foundation have many economic and environmental benefits in loess ground. Therefore, the type and key technology of micropiles foundation in loess ground are analyzed, and the economy of micropiles foundation in loess ground is evaluated by example calculation.