基于钻探试验的海洋土土体剖面分层

吴刚; 冯治国; 余颂; 戚雯璐; 陈松庭

doi:10.20265/j.cnki.issn.1007-2993.2024-0196

基于钻探试验的海洋土土体剖面分层

doi: 10.20265/j.cnki.issn.1007-2993.2024-0196

吴刚^1,,
冯治国¹,
余颂¹,
戚雯璐^{2, 3},
陈松庭^{2, 3, ,}

1.
中铁大桥勘测设计院集团有限公司，湖北武汉　430050
2.
浙江工业大学，土木工程学院，浙江杭州　310023
3.
浙江工业大学，可再生能源基础设施建造技术教育部工程研究中心，浙江杭州　310023

详细信息

作者简介:
吴　刚，男，1981年生，硕士，高级工程师。研究方向为岩土工程。E-mail：48040791@qq.com

通讯作者:
陈松庭，男，1999年生，在读博士研究生。研究方向为岩土工程。E-mail：chenst2021@zjut.edu.cn

中图分类号: TU42
计量
- 文章访问数: 24
- HTML全文浏览量: 7
- PDF下载量: 2
- 被引次数: 0
出版历程
- 收稿日期: 2024-05-08
- 修回日期: 2024-07-19
- 录用日期: 2024-08-29
- 刊出日期: 2025-06-09

Stratification of marine soil profile based on borehole tests

Wu Gang^1
,,
Feng Zhiguo¹,
Yu Song¹,
Qi Wenlu^{2, 3},
Chen Songting^{2, 3
, ,}

1.
China Railway Major Bridge Reconnaissance & Design Institute Co., Ltd., Wuhan 430050, Hubei, China
2.
College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310023, Zhejiang, China
3.
Engineering Research Center of Ministry of Education for Renewable Energy Infrastructure Construction Technology, Zhejiang University of Technology, Hangzhou 310023, Zhejiang, China

摘要

摘要: 海洋土在形成过程中受复杂地质作用影响存在显著的不均匀性，这种不均匀性会影响海洋岩土结构物的安全性和正常运行，准确地识别土层并探明土体性质对于海洋岩土结构物设计至关重要。基于随机场理论开展考虑不确定性的海洋土土体剖面分层，通过考虑土层间的空间相关性，估计各个土体单元所属各土体类别的概率，最终通过蒙特卡洛抽样实现二维剖面土体分层。此外，分析了深度因子和钻探数量对分层结果不确定性的影响，结果表明：本研究方法可基于有限的工程钻探数据，实现海洋土二维剖面分层，并定量表征了土体分层结果的不确定性，减少钻探数量会增加分层的不确定性。
- 海洋土 /
- 钻探 /
- 随机场 /
- 土层划分 /
- 不确定性
Abstract: Marine soils have significant non-uniformity due to complex geological factors during the formation process, which can impact the safety and serviceability of marine geotechnical structures. Accurately identifying soil layers and determining soil properties are crucial for assessing foundation bearing capacity, predicting deformations, and designing marine geotechnical structures. A soil profile stratification method considering uncertainty was developed based on random field theory. By incorporating spatial correlations between soil layers, the probabilities of each soil element belonging to specific soil categories were estimated and two-dimensional soil stratification was achieved through Monte Carlo sampling. The influence of depth factors and the number of boreholes on the uncertainty of stratification results was analyzed. The results demonstrated that this approach can achieve two-dimensional soil stratification within the coverage range of limited borehole data. Reduction in the number of boreholes could increase the uncertainty of stratification results.
- marine soil /
- borehole /
- random field /
- soil stratification /
- uncertainty

HTML全文

图 1 网格划分及参数示意图

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图 2 钻探分层结果

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图 3 不同深度因子下的平均信息熵

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图 4 剖面土体分层结果

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图 5 海洋土剖面的分层不确定性

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图 6 传统插值法土体分层结果

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图 7 三组钻探分层结果

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图 8 基于三组钻探数据的剖面分层结果

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图 9 基于三组钻探数据的分层不确定性

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表 1 部分土体基本物理性质参数

钻孔水平位置/m	试样深度/m	土粒比重	液限/%	塑限/%
8	7.10～7.30	2.7	28.8	19.3
8	18.70～18.90	2.7	31.6	22.1
8	30.30～30.50	2.7	31.9	22.7
79	6.00～6.20	2.7	26.4	17.7
143	10.20～10.40	2.7	27.2	18.2
143	21.20～-21.40	2.7	26.4	17.3
222	9.35～9.55	2.7	24.5	15.8
222	22.15～22.35	2.7	26.7	17.5
222	34.15～34.35	2.69	25.8	17.8

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表 2 土体竖直影响范围I_V(m)

深度因子Z_D	竖直影响范围I_V(m) /m
深度因子Z_D	稍密粉砂	稍密粉土	中密粉土	密实粉土	粉土夹粉砂
1	0.1	0.15	0.225	0.175	0.1
2	0.2	0.3	0.45	0.35	0.2
3	0.3	0.45	0.675	0.525	0.3
4	0.4	0.6	0.9	0.7	0.4
5	0.5	0.75	1.125	0.875	0.5
6	0.6	0.9	1.35	1.05	0.6
7	0.7	1.05	1.575	1.225	0.7
8	0.8	1.2	1.8	1.4	0.8
9	0.9	1.35	2.025	1.575	0.9
10	1	1.5	2.25	1.75	1

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