MODEL EXPERIMENTAL STUDY ON AXIAL BEARING PROPERTIES OF ROCK-SOCKETED PILE GROUP FOR OFFSHORE WIND TURBINE

被引：0

作者：

Liu X. ^{[1
,2
]}

Hu Z. ^{[1
]}

Wang Q. ^{[3
]}

Tian D. ^{[1
]}

Liu C. ^{[1
]}

Li K. ^{[1
]}

机构：

[1] Chengdu Engineering Corporation Limited, Chengdu

[2] PowerChina Institute of Water Resources and Hydropower Research, Beijing

[3] School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang

来源：

Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2024年 / 45卷 / 06期

关键词：

bearing capacity; offshore wind power; pile foundations; rock-socketed pile group; wind farm;

D O I：

10.19912/j.0254-0096.tynxb.2023-0349

中图分类号：

学科分类号：

摘要：

Taking the high cap foundation of rock-socketed pile group using concrete filled steel tubular composite pile in Fujian offshore wind farm as the research object，the vertical compressive bearing characteristics and failure mechanism of rock-socketed pile group were studied by scale model test，and compared with rock-socketed single pile. The results show that in the early stage of loading，the overburden and bedrock between the concrete filled steel tubular composite pile group and the pile as a whole bear the upper compressive load together，which leads to the smaller increase of the axial force at the pile end of the pile group than that of the single pile，and the resistance at the pile end is limited，the downward stress is more difficult to diffuse than that of the single pile. In the later stage of loading，the connection cracks appear between the piles，which weakens the bearing capacity of the soil between the piles，and makes the pile end resistance and end resistance ratio of the pile group increase obviously. In addition，in order to avoid the influence of pile group effect，the pile spacing of concrete filled steel tubular composite piles should be above 3 times the pile diameter. © 2024 Science Press. All rights reserved.

引用

页码：637 / 645

页数：8

共 19 条

[1]

ZHANG J S，, Et al., Dynamic impedances of offshore rock-socketed monopiles［J］, Journal of marine science and engineering, 7, 5, (2019)

[2]

YANG J B, Et al., Overview of wind power in China：status and future［J］, Sustainability, 9, 8, (2017)

[3]

ZHANG Y S, HU S, WANG F., Distribution of offshore wind and wave energy resources considering severe weather constraints［J］, Acta energiae solaris sinica, 43, 12, pp. 200-205, (2022)

[4]

ZHANG J H, WANG H., Development of offshore wind power and foundation technology for offshore wind turbines in China［J］, Ocean engineering, 266, (2022)

[5]

ZHU B, JIANG Y W，, CHEN R P，, Et al., Investigation on pile group foundations for offshore wind turbines［J］, Chinese journal of geotechnical engineering, 33, S1, pp. 98-103, (2011)

[6]

SUN M M, LI W., Study on response of offshore wind turbine with high-pile cap foundation［J］, Acta energiae solaris sinica, 41, 7, pp. 265-273, (2020)

[7]

FENG Z J，, HU H B, JIA M H，, Et al., Influence of pipe bury depth on vertical bearing characteristics of concrete filled steel tubular composite pile ［J］, China civil engineering journal, 52, S2, pp. 110-116, (2019)

[8]

FENG Z J, WANG F C，, ZHANG Q L，, Et al., Centrifuge model tests of vertical bearing characteristics of steel pipe concrete composite pile ［J］, Journal of Chang’ an University（natural science edition）, 38, 2, pp. 42-49, (2018)

[9]

FENG Z J, ZHANG Q L，, Et al., Influence of pipe bury depth on vertical bearing characteristics of steel pipe concrete composite pile［J］, Highway, 63, 1, pp. 70-75, (2018)

[10]

LIU M W, Et al., Experimental research of steel-concrete joint bearing law of steel-concrete rock-socketed piles［J］, Hydro-science and engineering, 3, pp. 9-15, (2021)

← 1 2 →