V type pier inclined leg combined type support for continuous rigid frame bridge and layered cast-in-situ construction method

The invention belongs to a construction method for V-shaped slant legs of a continuous rigid frame bridge, and in particular relates to a construction method for the combined support and the layered cast-in-situ of the V-shaped slant pier legs of the continuous rigid frame bridge, solving the problems that the existing construction method can not meet the construction requirements of high linear precision and structural rigidity of mass concrete slant legs of a high-speed railroad bridge and the problems of low adaptability to the circumferential geology and environmental conditions of the existing construction method. The construction method has the steps of the construction of a vertical supporting system and a bracket template system; wherein the vertical supporting system comprises six rows of supporting points, and the bottom pile bases of the four rows of supporting points in the middle are drilled piles; the bottom pile bases of two rows of supporting points outside are precast concrete piles, and the upper part of the vertical supporting system is provided with the bracket template system; and the slant legs are processed by the operation of five-layer casting. The construction method has the advantages that the linear precision of the V-shaped slant pier legs can be guaranteed, the root parts of the V-shaped slant pier legs can be guaranteed not to be cracked, the effective erection of a supporting structure and the convenient operation and the safety of operators under adverse conditions can be guaranteed, and the construction method is especially suitable for the V-shaped pier construction with high pier, poor bridge location geology and high linear requirement.