The reserve section of the library is due to close in one hour.

图书馆的储备区是预期要关闭1小时。

due to 有预期的意思，具体解释如下：

due
/ djuː; US duː; du/ adj
[pred 作表语]
(a) ~ (to sb) owed as a debt or an obligation 应支付; 应给予; 欠下: Have they been paid the money due to them? 他们是否已得到了应得的钱? * I'm still due fifteen days' holiday. 我还应有十五天假期.
(b) ~ for sth owed sth; deserving sth 应有; 应得到: She's due for promotion soon. 她不久就要晋升了.

[pred 作表语] requiring immediate payment 须立即支付; 到期: fall/become due 到期 * My rent isn't due till Wednesday. 我的租金星期三才到期.

[pred 作表语] ~ (to do sth) scheduled; arranged; expected 预定; 约定; 预期: His book is due to be published in October. 他的书预定十月份出版. * The train is due (in) (ie scheduled to arrive) in five minutes. 火车预定在5分钟后到达.

[attrib 作定语] suitable; right; proper 适当的; 正当的; 适宜的: after due consideration 经适当考虑之后 * With all due respect, I disagree completely. 不揣冒昧, 实不敢苟同.
~ to sth/sb caused by sb/sth; because of sb/sth 由某人[某事物]引起的; 由於某人[某事物]: The team