黏土中筒型基础竖向承载影响深度研究

刘润; 宋毅然; 杨灿; 杨旭

doi:10.19912/j.0254-0096.tynxb.2022-1948

PDF(3237 KB)

太阳能学报 ›› 2024, Vol. 45 ›› Issue (5) : 144-152. DOI: 10.19912/j.0254-0096.tynxb.2022-1948

黏土中筒型基础竖向承载影响深度研究

刘润¹, 宋毅然¹, 杨灿¹, 杨旭²

作者信息 +

STUDY ON INFLUENCE DEPTH OF VERTICAL LOADING FOR BUCKET FOUNDATIONS IN CLAY

Liu Run¹, Song Yiran¹, Yang Can¹, Yang Xu²

Author information +

文章历史 +

摘要

开展筒型基础在上黏下砂成层土中模型试验,提出“砂层下探法”确定竖向荷载影响深度。分析结果发现：均质黏土中,宽浅式筒型基础竖向承载影响深度约为筒端以下0.5倍筒径,随着长径比的增加,竖向承载影响深度缓慢增加;在强度随深度线性增长的黏土中,竖向承载影响深度与土体不均匀系数呈反比。

Abstract

In this paper, the model test of bucket foundation in sand layered soil with upper clay layer and lower clay layer is carried out, and the "sand layer probe method" is proposed to determine the influence range of vertical load, which can effectively determine the depth of bearing layer of vertical bearing capacity of bucket foundation. The results show that： in homogeneous clay, the depth of bearing stratum of wide shallow bucket foundation is about 0.5 times of the cylinder diameter below the cylinder end, and the depth of bearing stratum increases slowly with the increase of length diameter ratio. In clays where the strength increases linearly with depth, the depth of the bearing layer is inversely proportional to the soil non-uniformity coefficient.

导出引用

刘润, 宋毅然, 杨灿, 杨旭. 黏土中筒型基础竖向承载影响深度研究[J]. 太阳能学报. 2024, 45(5): 144-152 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1948

Liu Run, Song Yiran, Yang Can, Yang Xu. STUDY ON INFLUENCE DEPTH OF VERTICAL LOADING FOR BUCKET FOUNDATIONS IN CLAY[J]. Acta Energiae Solaris Sinica. 2024, 45(5): 144-152 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1948

中图分类号： TU432

参考文献

[1] 赵珍玉, 张一, 李刚, 等. 风电并网条件下的梯级水电站长期优化调度[J]. 水力发电学报, 2020, 39(12): 62-75.
ZHAO Z Y, ZHANG Y, LI G, et al.Long-term optimal dispatching of cascade hydropower stations under large-scale wind power grid integration[J]. Journal of hydroelectric engineering, 2020, 39(12): 62-75.
[2] 金新峰, 廖胜利, 刘战伟, 等. 考虑风电置信区间的水风火短期优化调度方法[J]. 水力发电学报, 2020, 39(9): 33-42.
JIN X F, LIAO S L, LIU Z W, et al.Short-term optimal operation method of water, wind and thermal power considering wind power confidence intervals[J]. Journal of hydroelectric engineering, 2020, 39(9): 33-42.
[3] 刘喜珠. 海上风电大直径宽浅筒型基础结构设计及安全性研究[D]. 天津: 天津大学, 2010.
LIU X Z.Study on design and security of large-diameter and wide-shallow bucket foundation for offshore wind power[D]. Tianjin: Tianjin University, 2010.
[4] LIU R, CHEN G S, LIAN J J, et al.Vertical bearing behaviour of the composite bucket shallow foundation of offshore wind turbines[J]. Journal of renewable and sustainable energy, 2015, 7(1): 013123.
[5] 丁红岩, 章李卉, 张浦阳, 等. 海上临坡宽浅式筒型基础承载特性研究[J]. 太阳能学报, 2021, 42(2): 163-171.
DING H Y, ZHANG L H, ZHANG P Y, et al.Bearing capacity analysis of large diameter and shallow buried bucket foundation near slope for offshore wind turbine[J]. Acta energiae solaris sinica, 2021, 42(2): 163-171.
[6] 汪嘉钰, 刘润, 陈广思, 等. 海上风电宽浅式筒型基础竖向极限承载力上限解[J]. 太阳能学报, 2022, 43(3): 294-300.
WANG J Y, LIU R, CHEN G S, et al.Upper bound solution limit analysis of vertical bearing capacity of shallow bucket foundation for offshore wind turbines[J]. Acta energiae solaris sinica, 2022, 43(3): 294-300.
[7] 施晓春, 徐日庆, 龚晓南, 等. 桶形基础发展概况[J]. 土木工程学报, 2000, 33(4): 68-73, 92.
SHI X C, XU R Q, GONG X N, et al.Introduction of bucket foundation[J]. China civil engineering journal, 2000, 33(4): 68-73, 92.
[8] 张浦阳, 魏宇墨, 校建东, 等. 复合筒型基础在粉土中的抗扭承载特性研究[J]. 太阳能学报, 2021, 42(9): 270-278.
ZHANG P Y, WEI Y M, XIAO J D, et al.Torsional bearing capacity of composite bucket foundation in silty sand[J]. Acta energiae solaris sinica, 2021, 42(9): 270-278.
[9] 李亚杰. 吸力筒基础在海上风电领域应用的重难点分析[J]. 船舶物资与市场, 2021, 29(12): 18-20.
LI Y J.Analysis of difficulties and difficulties in the application of suction tube foundation in offshore wind power field[J]. Marine equipment/materials & marketing, 2021, 29(12): 18-20.
[10] 袁萍. 在实际工程中怎样选择持力层厚度[J]. 地质灾害与环境保护, 2001, 12(1): 40-42.
YUAN P.Determination of bearing layer thickness in practical engineering[J]. Journal of geological hazards and environment preservation, 2001, 12(1): 40-42.
[11] 陈强华, 陈国铨, 谢汝彬, 等. 进入持力层不同深度对单桩承载力的影响[J]. 岩土工程学报, 1981, 3(1): 16-27.
CHEN Q H, CHEN G Q, XIE R B, et al.Influence of the penetration depth into the bearing stratum on the bearing capacity of single pile[J]. Chinese journal of geotechnical engineering, 1981, 3(1): 16-27.
[12] 高广运, 杨成斌, 高盟, 等. 持力层对大直径扩底灌注桩竖向承载性状的影响[J]. 岩土工程学报, 2012, 34(7): 1184-1191.
GAO G Y, YANG C B, GAO M, et al.Influences of bearing stratum on vertical bearing behaviors of large diameter cast-in-place belled piles[J]. Chinese journal of geotechnical engineering, 2012, 34(7): 1184-1191.
[13] HANSEN J B.A general formula for bearing capacity[J]. Danish Geotechnical Institute Bulletin, 1961, 11: 38-46.
[14] JTS 147—2017, 水运工程地基设计规范[S].
JTS 147—2017, Code for foundation design on port and waterway engineering[S].
[15] TCHENG Y H.Comportement d'une fondation élastique établie sur un massif élastique soumis à un chargement horizontal[C]//Comptes-rendus du Quatrième Congrès International de Mécanique des Sols et des Travaux de Fondations, Londres, 1957.
[16] 常士骠, 张苏民. 工程地质手册[M]. 第4版. 北京: 中国建筑工业出版社, 2007.
CHANG S B, ZHANG S M.Geological engineering handbook[M]. Beijing: China Architecture & Building Press, 2007.
[17] 刘梅梅, 练继建, 杨敏, 等. 宽浅式筒型基础竖向承载力研究[J]. 岩土工程学报, 2015, 37(2): 379-384.
LIU M M, LIAN J J, YANG M, et al.Vertical bearing capacity of wide-shallow bucket foundation[J]. Chinese journal of geotechnical engineering, 2015, 37(2): 379-384.
[18] 张钦喜, 李继红. 地基承载力的新计算方法[J]. 岩土工程学报, 2010, 32(S2): 37-41.
ZHANG Q X, LI J H.A new method of calculating the bearing capacity of strip foundation[J]. Chinese journal of geotechnical engineering, 2010, 32(S2): 37-41.
[19] 肖大平, 陈环, 孙万禾. 浅基础下破坏面深度的确定[J]. 港口工程, 1995(6): 12-16.
XIAO D P, CHEN H, SUN W H, et al.Determination of the depth of rupture surface beneath shallow footings[J]. Journal of hydroelectric engineering, 1995(6): 12-16.