The bottom structure is supported by every longitudinal beam in orientation calculation, and then the orientation force and elasticity supporting force is obtained.
计算时，底部弹性支承在各纵梁上，可求得结构的横向受力与弹性支承反力。
2
Sand body thickness vary greatly, on longitudinal H1 is more connectible than H2 and H3. On landscape the sand connecting is good in the main direction of river orientation.