一字闸是七十年代后黑龙江省一些地区创造的一种新闸型。它具有抗冻性能好、工程量小、施工简单等优点,因而在北方寒冷地区的中、小型渠道水闸工程中被广泛采用。一字闸与开敝式水闸相比,它取消了进口防渗段和出口段,并且使闸室的长度缩短到一条线上。在平面上呈一字形,一字闸由此而得名。一字闸主要是用砼板(也称之为 The word gate is a new type of gate created in some areas of Heilongjiang Province in the seventies. It has the advantages of good frost resistance, small amount of construction, simple construction, etc. It is widely used in medium and small-sized sluice projects in cold northern regions. Compared with the open sluice, the sluice gate cancels the entrance of the impermeable section and the exit section, and shortens the length of the sluice chamber to a line. In the plane was a zigzag, hence the name of a gate. The main gate is a concrete slab (also known as