The invention discloses a construction method of a prefabricated beam
hogging moment tensioning groove. The construction method comprises the following steps that 1, a
hogging moment tooth plate steelreinforcement framework is welded and formed; 2, a
hogging moment tensioning groove formwork is installed; 3, the hogging moment tooth plate steel reinforcement framework and an anchorage device areinstalled and located; 4, a corrugated
pipe is installed; and 5, concrete is poured, wherein after installing of a top plate
steel bar is completed, a gap is reserved in the formwork for blocking, theconcrete is used for carrying out one-time pouring and forming from the middle to the two ends, in the pouring process, attention is paid to that pouring is carried out on a tooth plate firstly and then on a top plate, vibrating of the intensive portion of the
steel bar is reinforced, and after the concrete is subjected to later-period preserving, the prefabricated beam hogging moment tensioninggroove is obtained. According to the construction method, locating precision of the anchorage device and the corrugated
pipe in the hogging moment tensioning groove in the prefabricating process of abeam body can be improved effectively, the probability that the concrete on the top plate is pulled and cracked in the hogging moment tensioning construction process can be reduced, channeling blocking of the corrugated
pipe is reduced, steel strands can be threaded smoothly, and the method has high market popularization value.