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Grouting system for enhancing bearing capacity of offshore wind power pile foundation and construction method

A technology of grouting system and offshore wind power, which is applied in the direction of infrastructure engineering, sheet pile walls, buildings, etc., can solve the problems of limited length and pile foundation bearing capacity that cannot meet the design requirements, and achieve the reduction of length and man-machine material input Economical and convenient construction

Inactive Publication Date: 2021-06-04
CHINA THREE GORGES NEW ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the penetration depth of steel pipe piles and the length of inclined piles, the bearing capacity of the pile foundation under the existing technology cannot meet the design requirements under specific geological conditions

Method used

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  • Grouting system for enhancing bearing capacity of offshore wind power pile foundation and construction method
  • Grouting system for enhancing bearing capacity of offshore wind power pile foundation and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] see Figure 1-2 , a grouting system for strengthening the bearing capacity of offshore wind power pile foundations, which includes a pipeline installation structure 1 for installing the grouting system; Pile side grouting system 4 and pile bottom grouting system 5 for grouting the pile bottom of cast-in-place pile 8; said pile-side grouting system 4 is connected with the grouting system, and injects grout 2 into cast-in-place pile 8 The pile side gap 9 between the outer wall of the cast-in-situ pile 8 and the seabed foundation layer 3; the pile bottom grouting system 5 is connected to the grouting system, and the grout 2 is injected between the pile bottom of the cast-in-situ pile 8 and the seabed foundation layer 3 The pile bottom gap between 6. By adopting the above-mentioned grouting system, after the cast-in-situ pile 8 is poured, secondary grouting can be performed, and the grout can infiltrate and split the pile body and the surrounding soil, and then solidify, t...

Embodiment 2

[0049] The construction method of grouting by using the grouting system for strengthening the bearing capacity of the offshore wind power pile foundation is characterized in that: through the grouting system embedded in the cast-in-place pile 8, the cast-in-situ pile 8 is formed and the secondary grouting is performed, Through the grout, the pile body and the surrounding soil will first be infiltrated and split, and then solidified, thereby increasing the bearing capacity.

[0050] The construction method for grouting the grouting system for strengthening the bearing capacity of the offshore wind power pile foundation is characterized in that it specifically includes the following steps:

[0051] Step 1: Select the wind turbine foundation under typical geological conditions with insufficient bearing capacity to carry out the pile foundation bearing capacity test, determine the standard values ​​of the vertical compressive and pullout ultimate bearing capacity of the pile founda...

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Abstract

The invention provides a grouting system for enhancing the bearing capacity of an offshore wind power pile foundation and a construction method. The grouting system comprises a pipeline installation structure used for installing the grouting system, the grouting system comprises a pile side grouting system used for conducting grouting on the outer side wall of a cast-in-place pile and a pile bottom grouting system used for conducting grouting on the pile bottom of the cast-in-place pile, the pile side grouting system is connected to the grouting system, grout is injected into a pile side gap between the outer side wall of the cast-in-place pile and a seabed foundation layer, the pile bottom grouting system is connected to the grouting system and injects the grout into a pile bottom gap between the pile bottom of the cast-in-place pile and the seabed foundation layer. By the adoption of the grouting system, secondary grouting can be conducted after pouring of the cast-in-place pile is completed, permeation and splitting effects are generated on a pile body and a nearby soil body through the grout, then solidification is conducted, and therefore the effect of increasing the bearing capacity is achieved.

Description

technical field [0001] The invention relates to the technical field of offshore wind power pile foundation engineering, in particular to a grouting system and a construction method for strengthening the bearing capacity of offshore wind power pile foundations. Background technique [0002] In recent years, my country's offshore wind power construction has been booming. Granite is widely distributed in southeast coastal areas such as Fujian and Guangdong. Granite belongs to special rock and soil, and the formation lithology is complex and changeable. Especially, the spherical weathering of granite has inhomogeneity, discreteness, difference, mutation. The weathered layer is often deep and continuous and the degree of weathering is uneven. The thickest part of the strongly weathered granite layer that has been discovered in the southeast coast of my country is more than 40 meters, and there are fragmented interlayers distributed at the same time. [0003] The offshore wind tur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D15/00E02D27/52E02D27/44E02D27/12E02D5/34
CPCE02D15/00E02D27/52E02D27/44E02D27/12E02D5/34
Inventor 周兴政吴涛项建强王爱国叶于飞石玉琪
Owner CHINA THREE GORGES NEW ENERGY CO LTD
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