Device and method for quickly constructing bridge substructure in half-shore and half-water narrow water area

Abstract

The invention relates to a device and a method for quickly constructing a bridge substructure in a half-shore and half-water narrow water area, and belongs to the technical field of underwater bridge foundation construction. The method comprises the steps that a platform pile and a supporting pile are inserted and driven through a mast crane and a floating crane, a connecting system is welded to serve as a temporary supporting structure of a cofferdam inner support, and a pile hanging bracket is arranged on the outer wall of a steel casing; the cofferdam inner support and a drilling platform are divided into a plurality of small blocks to be spliced on a small double-spliced barge, the small inner support is hoisted to the temporary supporting structure through the small floating crane, and the small drilling platform is hoisted to the pile hanging bracket through the small floating crane; drilling is conducted as soon as possible after the first drilling platform is formed, and in the drilling construction process, the rest of inner supporting plate blocks and drilling platform plate blocks are hoisted and welded; in the drilling construction process, an inner support lowering system is installed, and the cofferdam inner support is lowered and installed; and in the drilling construction process, a locking opening steel sheet pile cofferdam is inserted and driven with the inner support as the guide. According to the device and the method, the construction cost is greatly reduced, and the construction period is greatly shortened.

Description

technical field [0001] The present application relates to the technical field of underwater bridge foundation construction, in particular to a device and method for rapidly constructing a bridge substructure in a half-bank half-water narrow water area. Background technique [0002] At present, before the construction of the pile group foundation of deep-water bridge construction, the pier columns of large bridges or extra-large bridges need to provide a temporary drilling platform for pile foundation construction. The drilling platform needs to be equipped with construction machinery and bear construction loads at the same time. Therefore, it needs to have sufficient rigidity, strength and stability. At the same time, the steel casing needs to be kept fixed to ensure the verticality of the pile foundation and meet the requirements of subsequent bridge construction. [0003] In the related art, the traditional construction method of the bridge substructure is: 1) driving stee...

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Problems solved by technology

[0005] The embodiment of the present application provides a device and method for quickly constructing the substructure of the bridge in the narrow waters of the half-bank and half-water, so as to solve the problem that in the related art, the construction of the underwater bridge foundation requires the establishment of a drilling platform first, and the establishment of the drilling platform takes several months. time, leading to the problem of low construction efficiency

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