Steel casing lead hole type pile planting construction technology

Abstract

The invention discloses a steel casing lead hole type pile planting construction technology. The steel casing lead hole type pile planting construction technology comprises the steps: firstly, determining a pile position and a pile position center line underwater; secondly, performing slope bedding and slope flattening construction for the pile position preliminarily by centering on the pile position center line; thirdly, further performing construction for the pile position after slope bedding and slope flattening in the second step are completed so as to form a lead hole for holding a steel casing; fourthly, hoisting the steel casing, subjecting the steel casing to pile sinking to enable the steel casing to be in the lead hole, and guaranteeing that a center line of the steel casing is consistent with the pile position center line; fifthly, performing pile planting construction through a frost boil hole formed in the bottom of the steel casing by the aid of a tremie method, and guaranteeing that a riverbed rockface has concrete with a certain thickness while the lead hole is filled with concrete. The steel casing lead hole type pile planting construction technology has the advantages that lead hole depth, hole bottom flatness, hole bottom sediments and pile sinking deviation are controlled, the pile planting construction technology can adapt to complicated geological conditions, construction procedures are reduced, input of ship and machine equipment, personnel and platform materials is reduced, construction progress is accelerated, and cost is saved economically.

Description

technical field [0001] The invention relates to the field of underwater construction, in particular to a construction technique for planting piles in pilot holes of steel casings. Background technique [0002] The conventional construction technology of perfusion-type rock-socketed piles at the wharf adopts first erecting auxiliary steel pipe piles (Φ800mmδ10mm) to support the construction platform, and then placing steel sleeves and constructing rock-socketed piles on the supporting construction platform. [0003] During the construction process, construction needs to be arranged after underwater reef blasting and slag removal, but since the water level of the Yangtze River has risen to about +20m (the elevation of the pier pile top +23.09m), the site construction environment is no longer suitable for auxiliary steel pipe piles to support the construction platform. Conditions affect the construction progress; moreover, the problems of slurry leakage and steel casing settlem...

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Problems solved by technology

[0003] During the construction process, construction needs to be arranged after underwater reef blasting and slag removal, but since the water level of the Yangtze River has risen to about +20m (the elevation of the pier pile top +23.09m), the site construction environment is no longer suitable for auxiliary steel pipe piles to support the construction platform. Conditions affect the construction progress; and the problems of slurry leakage and steel casing settlement often occur in the follow-up process of steel casing drilling

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