The population of the world has more than doubled in the pas

The population of the world has ( more than doubled in the past ten years.)
more than doubled 两倍以上
因为有 as expected,than usual 这些后面都跟的形容词,所以我认为是doubled是形容词,但是如果真是这样,more than 是不是也可以改成as many as doubled?
可以这么用,也可以这么说:double as many as it is in the past ten years

as many as doubled 不能表示“更多的“的意思， 只能表示像......一样。

double这里是动词，意为翻倍。
doubled是被动态
全句为：在过去的10个里世界人口已经翻了两倍。
不能改为AS MANY AS用法不对，意思也不对