如图,三棱柱\(ABC-A_{1}B_{1}C_{1}\)中,侧面\(AA_{1}C_{1}C⊥\)侧面\(ABB_{1}A_{1}\),\(AC=AA_{1}= \sqrt {2}AB\),\(∠AA_{1}C_{1}=60^{\circ}.AB⊥AA_{1}\),\(H\)为棱\(CC_{1}\)的中点,\(D\)为\(BB_{1}\)的中点.
\((\)Ⅰ\()\)求证:\(A_{1}D⊥\)平面\(AB_{1}H\);
\((\)Ⅱ\()AB= \sqrt {2}\),求三棱柱\(ABC-A_{1}B_{1}C_{1}\)的体积.