Steel casing lead hole type pile planting construction technology

A construction technology and steel casing technology, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve problems affecting construction progress, slurry leakage, and lack of auxiliary steel pipe pile conditions, etc., to ensure the correct positioning rate and The effect of verticality

Active Publication Date: 2014-10-22
CHINA STATE CONSTR HARBOR CONSTR
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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 envir

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  • Steel casing lead hole type pile planting construction technology
  • Steel casing lead hole type pile planting construction technology
  • Steel casing lead hole type pile planting construction technology

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Embodiment Construction

[0030] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0031] In this embodiment, the diameter of the steel casing is Φ1800mm. Considering the requirements of construction measurement control on the water and "implantation method" construction grouting, the diameter of the pilot hole is designed to be Φ2200mm; the pilot hole with a diameter of 2.2 meters is implanted into a steel casing with an outer diameter of 1.8 meters. From the process, the adjustment of the deviation of about 10cm in the pile position can be guaranteed.

[0032] The steel casing is self-heavy (single pile 20-30t), the anchoring depth is 2-2.5m, the anchoring concrete strength is high (underwater C30 concrete), the cross-section of the platform supported by the steel casing is small, and the horizontal force on the entire platfo...

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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...

Claims

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Application Information

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IPC IPC(8): E02D5/38
Inventor 孙二建徐雪锋邹德斌陈俊刘伟蔡荣华肖飞秦晓明
Owner CHINA STATE CONSTR HARBOR CONSTR
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