Experimental study on installation of hybrid bucket foundations for offshore wind turbines in silty clay

被引：57

作者：

Zhang, Puyang ^{[1
,2
,3
]}

Guo, Yaohua ^{[3
]}

Liu, Yonggang ^{[3
]}

Ding, Hongyan ^{[1
,2
,3
]}

机构：

[1] Tianjin Univ, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300072, Peoples R China

[2] Tianjin Univ, Key Lab Coast Civil Struct Safety, Minist Educ, Tianjin 300072, Peoples R China

[3] Tianjin Univ, Sch Civil Engn, Tianjin 300072, Peoples R China

来源：

OCEAN ENGINEERING | 2016年 / 114卷

基金：

中国国家自然科学基金;

关键词：

Hybrid bucket foundation (HBF); Silty clay; Offshore wind turbines; Sinking technique; Tilt adjustment; SUCTION CAISSONS; FIELD TRIALS; SAND; TESTS;

D O I：

10.1016/j.oceaneng.2016.01.025

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

Two large-scale sinking tests of the hybrid bucket foundation were revealed in typical saturated silty clay of China offshore wind farms. The experimental foundation has an outer diameter of 3.5 m and a clear wall height of 0.9 m with seven rooms divided inside the HBF by steel bulkheads, which are arranged in a honeycomb structure. The different pressure inside the seven compartments can control the levelness of the HBF during suction installation. During the sinking process of the bucket foundation, real-time monitoring was conducted of the produced underpressure, the soil pressure and the pore pressure inside and outside the bucket wall, which reflected the sinking state of the bucket foundation. Test results show that suction can be combined with air pumping to reasonably control the sinking speed of the bucket foundation and the levelness at each stage. In the cases where the soil surface at the sinking location for the bucket foundation was relatively horizontal, the levelness could be ensured to meet the standard and design requirements after the sinking of the bucket foundation was completed. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：87 / 100

页数：14

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