The invention provides a seismic-resistant-columned
rock bolt foundation with an enlarged
toe and a construction method of the seismic-resistant-columned
rock bolt foundation with the enlarged
toe. The seismic-resistant-columned
rock bolt foundation comprises a vertical cylindrical foundation body, the vertical cylindrical foundation body is equal to an upper seismic-resistance column in cross sectional size, and the cylindrical foundation body is inlaid in
bed rock and provided with an enlarged bottom. The enlarged bottom is provided with a plurality of radial anchor bolts, and the cylindrical foundation body and the
bed rock are anchored integrally with concrete by in-trench placement. Excavated volume of the rock foundation can be reduced effectively, the problems of large project amount, high manpower and
material consumption and high cost are solved, and excavation cost is lowered greatly. The foundation is reliably connected with the
bed rock by bottom enlargement and
radial distribution of anchor bolts, connection of the column with the bed rock is enhanced effectively, extraction resistance,
shear resistance, compression resistance and antidumping
bearing capacity of the foundation are enhanced, horizontal or
vertical displacement or separation between the column bottom and the bed rock in a high
earthquake intensity area under the action of earthquake when an earthquake occurs is avoided, and
seismic resistance of a building on the rock foundation is improved effectively.