Influence of Clay Layering Properties on the Embedment Loss of Suction Embedded Plate Anchors

ZHAO Yunxuan; ZHAO Yanbing; GAO Peng; YAN Wei

doi:10.13409/j.cnki.jdpme.20231102006

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Influence of Clay Layering Properties on the Embedment Loss of Suction Embedded Plate Anchors

更新时间：2024-06-26

- Influence of Clay Layering Properties on the Embedment Loss of Suction Embedded Plate Anchors
- Journal of Disaster Prevention and Mitigation Engineering Vol. 44, Issue 3, Pages: 525-534(2024)
- 作者机构：
  
  太原理工大学水利科学与工程学院，山西太原 030024
- 作者简介：
- 基金信息：
- DOI：10.13409/j.cnki.jdpme.20231102006
  CLC： TU470/P751
- Received：02 November 2023，
  
  Revised：2023-12-18，
  
  Published：25 June 2024
- 稿件说明：
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赵云轩,赵燕兵,高鹏等.黏土分层特性对吸力嵌入式板锚埋深损失的影响[J].防灾减灾工程学报,2024,44(03):525-534.

ZHAO Yunxuan,ZHAO Yanbing,GAO Peng,et al.Influence of Clay Layering Properties on the Embedment Loss of Suction Embedded Plate Anchors[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(03):525-534.
赵云轩,赵燕兵,高鹏等.黏土分层特性对吸力嵌入式板锚埋深损失的影响[J].防灾减灾工程学报,2024,44(03):525-534. DOI： 10.13409/j.cnki.jdpme.20231102006.

ZHAO Yunxuan,ZHAO Yanbing,GAO Peng,et al.Influence of Clay Layering Properties on the Embedment Loss of Suction Embedded Plate Anchors[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(03):525-534. DOI： 10.13409/j.cnki.jdpme.20231102006.

摘要

海洋工程中，海床土体常伴有分层现象。将均质土、正常固结土在海床土体中的分布情况称之为土体分层特性。基于耦合的欧拉⁃拉格朗日（CEL）法，建立起用于分析不同土体分层特性的条件下，吸力嵌入式板锚（SEPLA）旋转调节过程的大变形有限元模型。通过与离心机实验及数值模拟结果对比，验证了模型的有效性。以双层黏土为例，研究了不同黏土分层特性下板锚的埋深损失。明确了衡量黏土分层特性的指标

u1，ave

u2，0

，并考察了不同

u1，ave

u2，0

下，系缆点距土层分界线的距离

对板锚埋深损失的影响。研究结果表明：在

u1，ave

u2，0

1的双层黏土中，随着

值的增大，板锚的埋深损失逐渐减小，当

≤-0.5

与

≥1

时，板锚的埋深损失分别仅受上层土体与下层土体强度影响；在

u1，ave

u2，0

1的双层黏土中，随着

值的增大，板锚的埋深损失先增大后减小，当

时，埋深损失存在一极大值Δ

max

，该极大值比板锚在单层土体中的埋深损失大32%~123%。同时，在

u1，ave

u2，0

1的双层黏土中，板锚的埋深损失与上层土体的平均强度

u1，ave

和锚埋深处的土体强度

有关；由于板锚埋深损失存在极大值Δ

max

，在工程中较为危险，因此，考察了强度比

u1，ave

、埋深处土体强度

、板锚初始埋深

对Δ

max

的影响。

Abstract

In marine engineering

seabed soils often exhibit layering phenomena. The distribution of homogeneous soil and normally consolidated soils in seabed soils is referred to as soil layering properties. Based on the Coupled Eulerian-Lagrangian (CEL) method

a large deformation finite element model was established to analyze the rotational adjustment process of the suction embedded plate anchors (SEPLA) under different soil layering properties. The validity of the model was verified through comparison with centrifuge tests and numerical simulations. The embedment loss of plate anchors under different clay layering properties was investigated by using double-layered clay as an example. The index

ave

was defined to measure the clay layering properties

and the influence of the distance d from the mooring point to the soil layer interface on embedment loss of plate anchors was examined under different

ave

values. The results showed that in double-layered clay with

ave

as d increased

the embedment loss of the plate anchors gradually decreased. When

≤-0.5

and

≥1

the embedment loss was only affected by the strength of the upper and lower soil layers

respectively. In double-layered clay with

ave

as d increased

the embedment loss of the plate anchors initially increased and then decreased

reaching a maximum value Δ

max

which was 32% to 123% larger than the embedment loss in the single-layered soil. Addition

ally

in the double-layered clay with

ave

the embedment loss of the plate anchors was related to the average strength of the upper soil

ave

and the soil strength at the anchor embedment depth

. Due to the existence of a maximum embedment loss value Δ

max

which poses a significant risk in engineering

the effects of the strength ratio

ave

the soil strength at the anchor embedment depth

and the initial embedment depth

of plate anchors on Δ

max

were investigated.

关键词

Keywords

references

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