A split caisson plus pile composite anchorage foundation and its construction method

Abstract

The invention discloses a split-type caisson plus pile composite anchorage foundation and a construction method thereof. A plurality of steel beams, a plurality of steel pipe piles laid on the foundation in the shaft of the front caisson and the rear caisson, and anchor bodies fixed on the front caisson and the rear caisson. Both the front caisson and the rear caisson include outer wall panels, partition walls, shafts, roofs, back-sealing concrete, bottom plates and core filling; both the front caissons and the rear caissons are reinforced concrete caissons with steel shells; Anchor chamber, anchor block, front anchor chamber, scatter saddle, scatter saddle beam, scatter saddle pier. The invention reduces the difficulty of caisson construction and the depth of soil penetration, the two caissons are separated by a certain distance, improves the ability to resist bending moment, improves the bearing efficiency of the caisson, effectively improves the horizontal bearing capacity of the caisson, saves the cost, and solves the problem of The problem of anchorage foundation construction of long-span bridges under soft ground conditions in marine deep water environment.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a novel structure and construction technology of a large-span bridge anchorage foundation on a soft soil foundation, in particular to a split-type caisson plus pile composite anchorage foundation and a construction method thereof. Background technique [0002] As bridge construction moves from inland to the open sea, construction conditions such as deep water, soft foundation, strong wind, rapids, waves, and strong earthquakes become more complex. The foundations of sea-crossing bridges are often located in deep water areas, and there are thick covering layers of soft soil, sandy soil, cohesive soil, and crushed (pebble) soil alternately, and there may be uneven soft (hard) interlayers in the covering layer; Suspension bridges with a span of 3000m and bridges with a cable-stayed-suspension cooperative system, in addition to bearing huge vertical forces, al...

AI Technical Summary

Problems solved by technology

However, the foundation depth of the split caisson foundation scheme is still relatively deep, and the height of the core filling in the rear caisson exceeds 70m, which is heavy and has a large additional inertial force under the earthquake load

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