求翻译：防渗墙混凝土(普通混凝士或塑性混凝土)浇筑时是在直接灌入而无振捣的情况下施工的，其强变比同等级地面浇筑的混凝土强度有不同程度的降低，因此在设计混凝土的配合比时应提高混凝土的强度等级：对普通混凝土防渗墙可提高一个强度等级;对塑性混凝土防渗墙因强度较低可提高10%～20%。是什么意思？

Anti-permeability wall concrete (General mixed coagulation scholars or plastic concrete) pouring Shi is in directly irrigation into and no vibration stamp of situation Xia construction of, its strong variable than with grade ground pouring of concrete strength has different degree of reduced, theref

Anti-permeability wall concrete (General mixed coagulation scholars or plastic concrete) pouring Shi is in directly irrigation into and no vibration stamp of situation Xia construction of, its strong variable than with grade ground pouring of concrete strength has different degree of reduced,