群桩各塔位间局部冲刷相互影响研究

Study of Part Scouring One Another Influence for Each Tower Location Caboodle Stakes

国内外关于单塔(墩)桩基础局部冲刷深度计算的成果较多,有比较成熟的经验、半经验计算公式,部分计算公式已列入规范,如《公路工程水文勘测设计规范》、《铁路工程水文勘测设计规范》等,这些公式大多应用在大桥桥墩冲刷深度设计中。对于多塔(墩)桩基础冲刷,冲刷深度由于受水流条件、泥沙特性、群桩组合方式、承台形式等众多因素影响,情况更加复杂,国内外研究成果不多,尚缺少能够有效计算实际工程冲刷深度的公式,加上送电塔群桩基础与桥墩群桩基础在形状、承台组成等方面存在差别。以山东黄河下游入海口河段跨河线路为例,介绍塔群桩基础最大冲刷深度和冲刷范围进行研究,为送电塔工程设计和施工提供科学依据。

Foundation scour of pile groups is complex. There are rarely research results both in China and aboard. Also there is no effectively formula to calculate the actual engineering scour depth. In this paper, the maximum scour depth and scour range of pile groups foundation are studied in the case of crossing river line in the lower reaches of the Yellow River in Shandong Province, which provides scientific basis for design and construction of tower.