Tunnel segment pre-buried orifice pipe for freezing method connection channel

The invention discloses a tunnel segment pre-buried orifice pipe for connecting channels through a freezing method. The tunnel segment pre-buried orifice pipe comprises an orifice pipe pre-buried pipe (1), an orifice pipe external connecting pipe (2) and a choke plug (3). The orifice pipe embedded pipe (1) is installed in a pipe piece (4) in an embedded mode, the orifice pipe embedded pipe (1) is connected with a steel bar structure in the pipe piece (4), and the axis of the orifice pipe embedded pipe (1) coincides with the designed axis of a freezing hole (41). The choke plug (3) is detachably connected to the orifice pipe embedded pipe (1), and the choke plug (3) is located in the pipe piece (4); one end of the orifice pipe external pipe (2) can be inserted into the freezing hole (41) and is coaxially connected with the orifice pipe embedded pipe (1), and the other end of the orifice pipe external pipe (2) extends out of the pipe piece (4) to form an orifice pipe structure. According to the method, damage t