近年来,在预应力张拉台座的施工中,一种新型的预应力张拉台座——换埋式预应力张拉台座出现了。它用换埋粗砂代替了传统台座的现浇混凝土,投资少,简便易行。因为它是用砂换埋的,所以在一个工地使用完后,可以很方便地挖出砂子,取出台座的构件运到下一个工地组装再用。在搬迁中,几乎不消耗任何材料,可为国家节约很多资财。使用它,可大大降低预制构件的成本,收到较高的经济效益。这种台座对中、小型预制构件厂非常适用,特 In recent years, in the construction of prestressed tension pedestal, a new type of prestressed tension pedestal - the embedded prestressed tension pedestal appeared. It replaces the traditional pedestal cast-in-place concrete with buried grit, with less investment and simple operation. Because it is buried with sand, so after a site is used, you can easily dig out the sand, remove the components of the pedestal shipped to the next site assembly and reuse. In the relocation, almost no consumption of any material, can save a lot of money for the country. Use it, can greatly reduce the cost of prefabricated components, receive higher economic benefits. This pedestal, small prefabricated plant is very suitable, special