Offshore wind power steel pipe socketed pile and pile outside grouting construction method

A technology of offshore wind power and rock-socketed piles, which is applied in sheet pile walls, foundation structure engineering, construction, etc., can solve problems such as unsatisfactory grouting effects and difficult construction, and achieve high piling efficiency, convenient operation, and sufficient grouting effects

Pending Publication Date: 2017-06-30
HUADIAN HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of difficult construction and unsatisfactory grouting effect in the prior art, the present invention proposes an offshore wind power steel pipe rock-socketed pile that is convenient for construction and can ensure effective combination of the pile wall and the rock wall through underwater grou

Method used

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  • Offshore wind power steel pipe socketed pile and pile outside grouting construction method
  • Offshore wind power steel pipe socketed pile and pile outside grouting construction method
  • Offshore wind power steel pipe socketed pile and pile outside grouting construction method

Examples

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Example Embodiment

[0023] Example one

[0024] The embodiment of the present invention provides an offshore wind power steel pipe rock-socketed pile external grouting construction process. The grouting construction technology sets a grouting port in the rock-socketed section of the steel pipe pile body and arranges multiple grouting pipes from the ground to the grouting port. It is convenient for construction and can ensure the effective combination of pile wall and rock wall by underwater grouting.

[0025] Specifically as figure 1 , image 3 As shown, the embodiment of the present invention provides an offshore wind power steel pipe rock-socketed pile 100, which includes a steel pipe pile body 110, and the slurry outlets 111 are evenly arranged within the length of the steel pipe pile body in the rock-socketed depth range. The outlet 111 is provided with a one-way grouting valve from inside to outside, and a rubber gasket 120 is wrapped outside the outlet 111. The offshore wind power steel pipe ro...

Example Embodiment

[0031] Example two

[0032] Based on the above-mentioned offshore wind power steel pipe rock-socketed pile, the present invention also provides a method for grouting outside the pile, which includes the following steps:

[0033] Step 1: Use a drilling rig to drill the hole to the design depth, perform the first hole cleaning, and then sink the pile foundation of the offshore wind power steel pipe rock-socketed pile to the design depth. When there is a soft layer on the upper part of the seawater bottom, the offshore wind power steel pipe rock-socketed pile is piled. When the pile body penetrates into the hard rock layer, the drilling rig reaches from the inner diameter of the pile to the bottom of the pile for drilling construction. The radius is greater than the radius of the pile body, and the drilling depth reaches the stop of the designed bearing layer.

[0034] Step 2: Perform a second hole cleaning to remove the residue at the bottom end of the offshore wind power steel pipe r...

Example Embodiment

[0036] Example three

[0037] The embodiment of the present invention provides an offshore wind power steel pipe rock-socketed pile external grouting construction process, including the following steps: Step one, such as Figure 4 As shown, within the length of the steel pipe pile in the rock-socketed depth range, with a height of 3 meters, each layer is evenly arranged with slurry outlets, and each layer is evenly arranged with 10 slurry outlets (according to the pile diameter and Outlet outlets are arranged in depth, and the control area of ​​each outlet is 4m 2 Appropriate), the pulp outlet is arranged in plum blossom form with the height change. The grouting outlet is equipped with a one-way valve device from the inside to the outside, and the outside of the grouting outlet is wrapped with rubber gaskets to protect the grouting conduit port; step two, describe the pile driving method of the steel pipe pile in the grouting construction process of the large diameter steel pipe ...

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Abstract

The invention relates to an offshore wind power steel pipe socketed pile which comprises a steel pipe pile body, pulp discharging openings are uniformly distributed in the steel pipe pile body length within the rock-socketed depth range at an equal interval, the pulp discharging openings are provided with one-way grouting valves from inside to outside, and the outer sides of the pulp discharging openings are wrapped with rubber gaskets. The invention furthermore relates to a pile outside grouting construction method. The method includes the following steps that (1), drilling construction is performed with a drilling machine to the designed depth, primary hole cleaning is performed, and then the pile foundation of the offshore wind power steel pipe socketed pile is made to sink to the designed depth; (2), secondary hole cleaning is performed, residuals at the pile bottom end of the offshore wind power steel pipe socketed pile are removed, a guide pipe is put down to be connected into the one-way grouting valves, and underwater grouting of concrete is started. The pile driving efficiency is high, grouting is complete, the pile wall and the rock wall can be combined effectively, and operation is convenient to perform.

Description

technical field [0001] The invention relates to the field of offshore platform construction, in particular to an offshore wind power steel pipe rock-socketed pile and a method for grouting construction outside the pile. Background technique [0002] In the coastal area, the geological conditions are complex, the seabed reefs, sand ridges, sand dunes, and ravines criss-cross, and the geological conditions in different regions vary greatly. . Based on this complex geological situation, the wind turbine foundation of offshore wind power projects needs to adopt the foundation form of steel pipe rock-socketed piles. The existing rock-socketed pile grouting technology is mostly applied to bored piles, that is, the drilling operation is carried out earlier, the steel casing retaining wall is placed in the hole, and then the grouting operation is carried out. However, for wind power foundations, using cast-in-situ piles as single pile foundations requires a large amount of groutin...

Claims

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Application Information

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IPC IPC(8): E02D27/42E02D15/04E02D5/38
CPCE02D5/38E02D15/04E02D27/425E02D2250/003
Inventor 贾沼霖袁新勇王小合张星波逯鹏刘玉飞张健翔孔德煌张康余刚张清涛郝利忠
Owner HUADIAN HEAVY IND CO LTD
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