求翻译：支架法施工中有几大控制难点，一是地基沉降随时间持续发生，难以准确估计；二是支架及基础本身非弹性变形不能通过预压完全消除，三是浇筑混凝土对支架造成偏载，使支架受力不均匀。是什么意思？

Stand construction method has several control difficult, first, foundation settlement continued to occur over time, is difficult to estimate accurately; second bracket and the base itself is non-elastic deformation can not be completely eliminated by pre-press and the third is caused by pouring conc

Stent Construction Law, there are a few major control difficult, and a settlement of the Foundation is continuing with the passage of time, it is difficult to estimate with any degree of accuracy; 2 Stent is non-elastic deformation and based itself cannot be completely eliminated, through an early p

In the support law construction has several big control difficulties, one is the settlement of ground occurs continually along with the time, accurately estimated with difficulty; Two is the support and the foundation itself inelasticity distorts cannot eliminate completely through the precompressio

Support method has several control difficulties, one settlement continued over time, it is difficult to estimate precisely; second bracket and the base itself cannot be inelastic deformation by preloading full elimination and the third is caused by pouring concrete to support loading, so that suppor