采用竹节桩对挤密螺纹桩复合地基进行补强的应用
摘要:沿海软土地区某料棚工程采用变截面挤密螺纹桩复合地基，在堆载高度到5～6 m时，未达到设计高度11 m，地面产生沉陷，最大沉陷量约1.30 m，网架立柱出现了较大的变形，最大水平位移超过680 mm，导致料棚处于超危状态。采用竹节桩对挤密螺纹桩复合地基进行加固，通过合理布置竹节桩打桩流向，采用长螺旋引孔、应力释放孔，减小竹节桩沉桩的挤土效应对原有挤密螺纹桩、边柱承台和基桩的影响。沉桩结束后，竹节桩单桩竖向承载力特征值不小于740 kN，满足竹节桩设计要求。加固后的竹节桩复合地基+筏板满足堆载的设计要求。
Abstract:The composite foundation with variable cross-section compacted screw pile was conducted in soft soil area. When the stacking height reaching 5～6 m, which was below the design height of 11 m, the ground subsidence occurred and the maximum subsidence was about 1.30 m. The grid frame column had a large deformation, and the maximum horizontal displacement was more than 680 mm, which led to the material shed in an ultra dangerous state. Bamboo joint pile was used to reinforce the composite foundation of variable cross-section compacted screw pile. By reasonably arranging the driving direction of bamboo joint pile, adopting long auger and stress release hole, the influence of soil squeezing effect of bamboo joint pile on original compacted screw pile, side column cap and foundation pile was reduced. After the pile sinking, the characteristic value of the vertical bearing capacity of the single bamboo joint pile was not less than 740 kN, which meet the design requirements. The reinforced bamboo pile composite foundation+ raft meet the design requirements of surcharge.
中文标题：
采用竹节桩对挤密螺纹桩复合地基进行补强的应用
Application of Bamboo Joint Pile in Strengthening Composite Foundation of Variable Cross-Section Screw Pile
作者：
王雪梅1,,梁皓2,丁继辉3,,,崔志鹏1,李君鹏4
Wang Xuemei1,,Liang Hao2,Ding Jihui3,,,Cui Zhipeng1,Li Junpeng4
作者简介:王雪梅，女，河北唐山人，1975年生，教授级高级工程师，注册土木工程师（岩土），主要从事岩土工程的勘察、设计、施工及治理。E-mail：363888273@qq.com通讯作者:丁继辉，女，河北唐山人，1962年生，工学博士，教授，主要从事软土地基及基础工程、基坑及边坡工程、岩土工程可靠度等研究。E-mail：dingjihui@126.com
通讯地址：
1.中国二十二冶集团有限公司，河北唐山 064099 2.河北益坤岩土工程有限公司，河北石家庄 050066 3.河北大学建筑工程学院，河北保定 071002 4.河北纵横集团丰南钢铁有限公司，河北省唐山 064000
1.ChinaNo.22MCCGroupCorporationLtd.,Tangshan064099,Hebei,China 2.HebeiYikunGeotechnicalEngineeringCo.,Ltd.,Shijiazhuang050066,Hebei,China 3.CollegeofCivilEngineeringandArchiteture,UniversityofHebei,Baoding071002,Hebei,China 4.HebeiZonghengGroupFengnanIronandSteelCo.,Ltd.,Tangshan064000,Hebei,China
中图分类号:TU 473
doi:10.3969/j.issn.1007-2993.2022.01.011
出版物：岩土工程技术
收稿日期:2021-08-22
刊出日期:2022-02-16
关键词:挤密螺纹桩,竹节桩,复合地基加固,长螺旋引孔
Key words:variable cross-section screw pile,bamboo joint pile,composite foundation reinforcement,long auger
文档包含图片数量：图片(8)张
文档包含表格数量：表格(1)个
参考文献：
[1]孙文怀,张元冬. 螺纹桩在软弱地层中的应用[J]. 华北水利水电学院学报,2009,3(6):74-76.
[2]窦德功,高 倩. 螺纹桩竖向承载力及其影响因素研究[J]. 港口技术,2019,(6):55-59.
[3]冷伍明,魏广帅,聂如松,等. 螺纹桩竖向承载特性及承载机理研究[J]. 铁道工程学报,2020,260(5):1-6, 35. doi: 10.3969/j.issn.1006-2106.2020.05.001
[4]钱建固,陈宏伟. 注浆成型螺纹桩接触面特性试验研究[J]. 岩石力学与工程学报,2013,32(9):1744-1750. doi: 10.3969/j.issn.1000-6915.2013.09.003
[5]周敏明,钱建固,黄茂松,等. 注浆成型螺纹桩桩土接触面机制的离散元模拟[J]. 岩土力学,2016,37(1):591-597.
[6]周 杨,肖世国,徐 骏,等. 变截面螺纹桩竖向承载特性试验研究[J]. 岩土力学,2017,38(3):747-756.
[7]HO H M,MALIK A A,KUWANO J,et al. Influence of helix bending deflection on the load transfer mechanism of screw piles in sand: experimental and numerical investigations[J]. Soils and Foundations,2021,61(3):874-885. doi: 10.1016/j.sandf.2021.04.001
[8]SALEEM M K,MALIK AA,KUWANO J,et al. Model study of screw pile installation impact on ground disturbance and vertical bearing behaviour in dense sand[J]. Conference Series: Earth and Environmental Science,2021,710(1):012056 (9pp).
[9]周佳锦,王奎华,龚晓南,等. 静钻根植竹节桩桩端承载性能试验研究[J]. 岩土力学,2016,37(9):2603-2610.
[10]周佳锦,龚晓南,严天龙,等. 软土地区填砂竹节桩抗压承载性能研究[J]. 岩土力学,2018,39(9):3425-3433.
[11]凌 造,吴江斌. 软土地层静钻根植桩承载性状数值模拟分析[J]. 建筑科学,2020,36(S1):94-103.
[12]郦 亮,叶俊能,周 晔,等. 软土地区竹节桩复合地基承载特性试验研究[J]. 地下空间与工程学报,2020,16(4):986-992.
[13]王忠瑾,方鹏飞,谢新宇,等. 带肋竹节桩竖向抗压承载力影响因素分析[J]. 岩土力学,2018,39(S2):381-388.
[14]何福渤. 长螺旋钻孔植桩工法竹节桩承载力试验研究[J]. 建筑科学,2021,37(1):50-56.
基金项目：
- 文件大小:
- 1.28 MB
- 下载次数:
- 60
-
高速下载
|
|
