新疆藏桂乡支渠老化过于严重,虽每年修补,但未能彻底解决问题,设施也无法配套完善,渠道也没有采取防冻胀及防渗措施.因此,在藏桂乡支渠防渗配套建设工程防渗改造设计中,以满足不冲、不於条件为前提,以渠道的边坡系数、糙率、渠堤超高为设计参数,对渠道的断面、渠底和边坡底板的衬砌进行了设计.并通过水力计算,确定了渠深;对渠道进行抗冻胀设计,得出了渠底和渠坡防冻层的厚度.经过此渠道防渗设计,得到了可行的最优设计结果. Aging of Canggui Township in Xinjiang is too serious. Although it is repaired every year, it can not completely solve the problem and the facilities can not be complemented and completed. The channels have not taken measures to prevent frost heaving and seepage. Therefore, In the design of seepage retrofit design, the design of lining slope, channel bottom and slope slab lining of the channel is designed with the slope coefficient, roughness and channel height of the channel as the design parameters The depth of canal was determined by hydrodynamic calculation, and the antifreeze expansion design of the canal was used to obtain the thickness of the antifreezing layer at the bottom of the canal and the slope of the canal. Through the seepage prevention design of this channel, the optimal design result was obtained.