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水工建筑物由于挡水结构的水头使水透到基础和河岸的土壤中,产生渗透压力。这种渗透压力对建筑物是不利的。它可以使基础底部受到冲刷,或发生管涌、流土和侵蚀,破坏基础;同的,由于浮托力的作用,使建筑物重量减轻,稳定和阻滑的安全减小,容易招致失事。为了防止水工建筑物基础中渗透水可能产生的有害后果,一般水工结构都必须根据地基和结构的特性,采取适当的防渗措施。杜家台分洪闸在进行技术设计中,鉴于成层非
Hydraulic structures generate osmotic pressure due to the water head of the retaining structure that allows water to penetrate into the soil of the foundation and bank. This pressure of infiltration is detrimental to the building. It can make the base of the bottom of the scouring, or the occurrence of piping, soil erosion and damage, undermining the basis; the same, due to the role of floating force to make the building to reduce weight, stability and sliding safety reduced easily lead to calamity. In order to prevent the potentially harmful consequences of infiltration of water in the foundations of hydraulic structures, the general hydraulic structures must adopt appropriate seepage control measures according to the characteristics of foundation and structure. Dujiatai flood diversion gate in the technical design, in view of non-stratified