Construction tool for secondary pouring of cast-in-place pile and construction method

The invention discloses a construction tool for secondary pouring of a cast-in-place pile and a construction method. The construction tool comprises a guide pipe, a movable plug is arranged at the tail end of the guide pipe, the movable plug comprises a pipe body and a bottom cover, one end of the pipe body communicates with the tail end of the guide pipe, the bottom cover is hinged to the other end of the pipe body, and the bottom cover can rotate along the hinge to seal an end port of the pipe body. According to the construction method, the working principle that the bottom cover of the movable plug is impacted through concrete pouring to automatically open is utilized, concrete is poured before pile body concrete is initially coagulated, the operation of relieving the isolation of the pile body concrete and newly poured concrete is completed in the concrete, and the concrete forming quality of the pile body is guaranteed. 本发明揭示了一种灌注桩二次灌注的施工工具及施工方法，施工工具包括导管，在导管末端设置有活动堵头，活动堵头包括管体和底盖，管体的一端连通于导管末端，底盖铰接于管体另一端，底