Monotonic and cyclic lateral behavior of semi-rigid pile in cement-improved clay: centrifuge tests and numerical investigation

Dai, Guoliang; OuYang, Haoran; Gao, Luchao; Liu, Hongbo; Guo, Qingqing; Gong, Weiming

doi:10.1007/s11440-023-01809-4

Cited by 13 publications

(3 citation statements)

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“…In the case of laterally loaded monopiles for OWTs, reinforcing the shallow soils is more economical. A few scholars have studied cement-reinforced monopiles in the waters of China, which is required owing to the poor soil conditions in this sea area [3,[7][8][9][10]. He et al [11] investigated cement-reinforced slender piles under static lateral load by field tests and finite element method (FEM) based on the concrete damage plasticity (CDP) model, and proposed its progressive damage mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…Hong et al [13] studied the deformation mechanism of soil around shallow cement-reinforced piles by centrifugal tests, numerical simulations, and particle image velocimetry (PIV), revealing the mechanism behind composite piles mobilizing the soil resistance. Dai et al [8] tested the mechanical properties of cement-reinforced semi-rigid monopiles in clay under static and cyclic loading by centrifugal model test (100g). They obtained the pile internal forces, pile displacements, experimental soil resistance distributions of the reinforced piles, and soil resistance per unit length to pile deflection (p-y) curves.…”

Section: Introductionmentioning

confidence: 99%

“…Traditional cement grouting is generally significantly effective [3,[7][8][9][10][11][12][13]; however, it releases a large amount of carbon dioxide during production, which is not environmentally friendly. In recent years, a new alternative has emerged in the form of microbially induced carbonate precipitation (MICP) technology.…”

Section: Introductionmentioning

confidence: 99%

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Numerical simulation of offshore monopiles with reinforcement in shallow soil layer

Zhu,

He,

Guo

2024

IOP Conf. Ser.: Earth Environ. Sci.

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With the development of large-scale offshore wind turbines (OWTs), monopile foundations require larger diameter and greater embedded depth to satisfy the higher bearing requirements. Large-diameter monopiles for OWTs are mainly loaded horizontally, and the horizontal resistance provided by the shallow soil plays an important role in the loading of the monopile foundation. Therefore, shallow soil reinforcement (such as cement grouting and bio-grouting) is an effective method to improve the bearing capacity of the monopile. In this study, the lateral static loading mechanism of a shallow-layer reinforced monopile was investigated by finite element method (FEM). The effect of reinforcements with different stiffness values (elastic modulus), different strengths (cohesion and friction angle) and different reinforced ranges (width and depth) was analyzed on the lateral bearing capacity, deformations, soil resistances, and soil resistance per unit length to pile deflection (p-y) curves of monopiles. Based on the numerical results, an empirical formula was proposed for predicting the reinforcement coefficient of the bearing capacity. The effects of different reinforcement parameters on the distribution of soil resistance were analyzed, and the soil resistances obtained by FEM were compared with those from a theoretical formula. It was found that the resistance provided by the reinforced soil was clearly reduced at the interface with the unreinforced soil, and the resistance of the unreinforced soil was not significantly affected by the reinforced soil.

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