Prolonged service life

The utility model discloses a prolonged service life, , include: a plurality of section pieces that splice each other, its vertical setting, to adjacent two section pieces, it sets up each other relatively, and is a plurality of the section piece is the annular structure through a plurality of connecting device end -to -end connection, wherein, connecting device includes a plurality of connecting pieces of longitudinal arrangement, and is concrete including two first connecting pieces that are located both ends to and a plurality of second connecting pieces arranged in proper order of spaced each other in the middle of lieing in, first connecting piece is L shape connecting plate or T shape connecting plate, the second connecting piece is for overlap a plurality of T shape connecting plate of establishing each other, the utility model discloses adopting a plurality of L shape connecting piece, T -connecting piece to realize the high -speed joint between two adjacent section pieces, not only the concatenation