An all-ground-anchor type single-
tower double-span cable-stayed bridge
system comprises a main beam, a stay cable, a main
tower and an anchor. The main beam is composed of a side span main beam body and a main span main beam body. The length of the side span main beam body is far smaller than that of the main span main beam body, and the side span main beam body and the main span main beam body are asymmetrically distributed. The side span main beam body is supported by a support arranged on a side span
buttress main
tower lower beam and fixedly connected with the main span main beam body and the anchor. The stay cable comprises a main span stay cable body and a side span stay cable body. The main span stay cable body supports the main span main beam body. The upper end of the side span stay cable body is anchored to the main tower and corresponds to the main span stay cable body in position. The lower end of the side span stay cable body is anchored to the anchor. The main tower provides anchorage for the main span stay cable body and the side span stay cable body and meanwhile transmits the
vertical force of the side span stay cable body to a foundation through a main tower bearing table and a main tower foundation. The anchor provides anchorage for the whole side span stay cable body and meanwhile balances the
horizontal force transmitted by the side span main beam body. The invention further discloses a construction method of the cable-stayed bridge
system. The cable-stayed bridge
system is high in adaptability, reasonable in
structural system, easy and convenient to construct, short in construction period, low in manufacturing cost and small in
safety risk in the construction period.