Structure support device for treating suspended span of submarine pipeline

The invention provides a structure support device for treating a suspended span of a submarine pipeline. The structure support device comprises a head hydraulic system, a main support plate, a leg main extension cylinder, an anti-sinking plate, a support leg lateral extension cylinder, a grabbing mechanism, a grabbing driving cylinder, a positioning rod, a lifting cylinder, an oil transmission pipe, a lifting lug and the like, wherein the main extension cylinder and the lateral extension cylinder fit to realize the lifting and angle adjustment of the whole structure support device; the lifting of the grabbing mechanism is controlled by the lifting cylinder; a distance from the pipe to the grabbing mechanism is determined by a positioning ring in front of the grabbing pipe; the grabbing driving cylinder controls the opening and the closing of a gripper; and when a gripper connecting rod is contacted with a stopper, the pipe is clamped and realizes self-locking to realize the clamping reliability. The structure support device can adapt to more submarine geographic conditions, has a certain automation capacity in a structure support method, and has such advantages as simple construction process, no need of production stop, short construction period and strong adaptability to height changeability of the suspended span.