Deeply buried bearing platform curtain structure of bridge and process for constructing deeply buried bearing platform curtain structure

Abstract

The invention discloses a deeply buried bearing platform curtain structure of a bridge, and relates to technologies for constructing major bridges. The deeply buried bearing platform curtain structure comprises a bearing platform contour (1) to be excavated. A circle of bored cast-in-place piles (2) is arranged on the outer side of the bearing platform contour (1), gaps (3) and jet grouting piles (4) are arranged among the adjacent bored cast-in-place piles (2), the gaps can be sealed by the jet grouting piles (4), the jet grouting piles (4) are positioned on the outer sides of the bored cast-in-place piles (2), and top beams are connected to the tops of the bored cast-in-place piles (2) and the tops of the jet grouting piles (4). The deeply buried bearing platform curtain structure has the advantages that the deeply buried bearing platform curtain structure is simple in operation and has a high economic benefit, a safety protection effect and an obvious water stop effect can be realized, and the construction efficiency can be improved. The invention further discloses a process for constructing the deeply buried bearing platform curtain structure of the bridge.

Description

technical field [0001] The invention relates to bridge construction technology, in particular to a bridge deep-buried bearing platform curtain structure, and also relates to the construction technology of the bridge deep-buried bearing platform curtain structure. Background technique [0002] In the process of excavating the foundation pit of the deep-buried cap platform of the bridge, especially in the special geological conditions such as water-facing or water-rich deep sand layers, the excavation of the foundation pit often needs to face water-carrying operations, so before excavation of the foundation pit A water stop is required. [0003] In the prior art, steel sheet piles are often used in conjunction with caisson construction to stop water when the cap foundation pit is buried deeper than 6m. The existing technology uses single-layer steel sheet piles for water-stopping. Since the steel sheet piles penetrate deeper into the soil during water-stopping and the rigidit...

AI Technical Summary

Problems solved by technology

The existing technology uses single-layer steel sheet piles for water-stopping. Since the steel sheet piles penetrate deeper into the soil during water-stopping and the rigidity of the single-layer steel sheet piles is not enough, the single-layer steel sheet piles require double walls and additional temporary support. Therefore, the existing water-stop structure not only requires a large investment, but also has an unsatisfactory water-stop effect; at the same time, when caisson construction is used for water-stop, the process is complicated and the construction period is long

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