Mooring positioning device for caisson and its construction method

Abstract

The invention relates to the field of mooring positioning technology and discloses a mooring positioning device for an open caisson and a construction method of the mooring positioning device. The device comprises front positioning structures, rear positioning structures, left side anchoring ingots, right side anchoring ingots, fair leads, mooring ropes and mooring rope take-up devices. The front positioning structures and the rear positioning structures are arranged on the upstream position and the downstream position of the open caisson, and the left side anchoring ingots and the right side anchoring ingots are arranged on the left side and the right side which are perpendicular to the water flow direction; the fair leads and the mooring rope take-up devices are arranged on the open caisson in a one-to-one correspondence mode; one side anchoring ingot is connected with one mooring rope take-up device through one set of mooring ropes via one fair lead, one positioning structure is connected with one mooring rope take-up device through one set of mooring ropes via one fair lead, and acting points of the mooring ropes are located at riverbed positions of the positioning structures. The device is a rigid positioning system with a few mooring ropes, the positioning structures and the side anchoring ingots correspond to top positioning devices of the open caisson one to one through the mooring ropes so that definite stressing can be achieved, and the positioning structures are stressed on the riverbed surface. The device is free of deepwater influences, easy to construct, capable of accurately positioning the open caisson and high in work efficiency.

Description

Technical field [0001] The invention relates to the technical field of mooring positioning, and is mainly applied to the positioning construction of a giant, ultra-deep large-section caisson, and belongs to the technical field of bridge construction engineering. Background technique [0002] With the rapid development of my country's high-speed rail technology, bridge construction needs to use a larger span structure to cross the Yangtze River, etc. The increase in bridge span will inevitably require a huge foundation load. With the development of bridge construction in wide waters and open seas, the complexity of geological conditions and the increase of water depth, super-large caisson foundation structures have appeared one after another. Many new technical problems will be encountered in these projects. At present, the domestic deep-water ultra-large caisson is lacking in deep-water positioning construction technology. The flexible system positioning system of front and rear ...

AI Technical Summary

Problems solved by technology

Many new technical problems will be encountered in these projects. At present, the deep-water positioning construction technology of super-large deep-water caissons in China is lacking, and the flexible system positioning system of front and rear positioning ships + anchor chains + Hall anchors is often used, and the length of the anchor chain is long. Affected by ebb and flow and two-way flow, the anchoring is inaccurate, the positioning accuracy is poor, and the caisson swing cannot be well controlled, or the structural form of pile group anchor pier structure + anchor chain + anchorage + small tonnage winch + ordinary steel wire rope is adopted. It has a large number of mooring devices, a long time for positioning and receiving cables, a huge number of projects, high costs, and poor bending resistance at the top of the pile group. Under the conditions of ultra-deep water and high flow velocity, the force of the super-large caisson can reach 1,000 tons Above grade, it is difficult to adapt to the conventional method

Images