南水北调中线总干渠永年县段湿陷性黄土地基处理设计

Design of loess foundation treatment for Yongnian section of middle route project of south-to-north water transfer

目前,水利工程湿陷性黄土地基处理设计规范仅有《湿陷性黄土地区建筑规范》(GB50025-2004)可为参考,但该规范主要适用于房屋建筑工程。显然,套用该规范对渠道地基处理进行设计,处理标准过于苛刻,没有充分发挥渠道自身具有的适应地基变形的优良性能,而且投资巨大。本文通过理论分析并结合南水北调中线总干渠永年县实际工程条件,提出了渠道工程湿陷性黄土地基处理的设计原则和方法,并经三维应力变形有限元结构分析验证,认为该处理原则和方法可满足渠道工程安全要求。

At present, water conservancy project in collapsible loess foundation treatment design has no specification, only ＂Code for Building Construction in Collapsible Loess Regions＂ （GB50025 -2004 ） for reference, but the specification is mainly used in building engineering. Apparently, if the specification is applied to the channel foundation treatment design, the processing standard is too high to demand, witch can not sufficiently play channel＇s excellent performance of having good adaptation to foundation deforma- tion, and the investment is huge~ Through theoretical analysis and combined with the actual engineering conditions, this paper proposed the design principle and method of channel engineering in collapsible loess foundation treatment and the three-dimensional stress deformation finite element structural analysis verifica- tion. The processing principle and method can meet the safety requirements for channel engineering.