[1]吕文龙,林逸峰,付 强.孔内深层强夯复合地基桩土应力比试验研究[J].华南地震,2024,(01):119-125.[doi:10.13512/j.hndz.2024.01.14]
LYU Wenlong,LIN Yifeng,FU Qiang.Experimental Study on Pile-soil Stress Ratio of the Compos?ite Foundation with Down-hole Dynamic Compaction[J].,2024,(01):119-125.[doi:10.13512/j.hndz.2024.01.14]
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孔内深层强夯复合地基桩土应力比试验研究()
华南地震[ISSN:1006-6977/CN:61-1281/TN]
- 卷:
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- 期数:
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2024年01期
- 页码:
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119-125
- 栏目:
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土木工程防震减灾
- 出版日期:
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2024-03-30
文章信息/Info
- Title:
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Experimental Study on Pile-soil Stress Ratio of the Compos?ite Foundation with Down-hole Dynamic Compaction
- 文章编号:
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1001-8662(2024)01-0119-07
- 作者:
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吕文龙1; 林逸峰2; 付 强2
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1.广东省建筑科学研究院集团股份有限公司,广州 510500;2.广州大学土木工程学院,广州 510006
- Author(s):
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LYU Wenlong1; LIN Yifeng2; FU Qiang2
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1.Guangdong Provincial Academy of Building Research Group Co.,Ltd.,Guangzhou 510000,China;2.School of Civil Engineering , Guangzhou University , Guangzhou 510000, China
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- 关键词:
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孔内深层强夯; 复合地基; 桩土应力比; 桩间土应力; 地基承载力; 荷载分担比
- Keywords:
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Down-hole dynamic compaction; Composite foundation; Pile-soil stress ratio; Soil stress between piles; Foundation bearing capacity; Load sharing ratio
- 分类号:
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TU473.1
- DOI:
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10.13512/j.hndz.2024.01.14
- 文献标志码:
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A
- 摘要:
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通过开展孔内深层强夯单桩复合地基现场静载试验和桩土应力测试,获取了不同荷载作用下孔内深层强夯复合地基的平均桩顶应力、桩间土应力、桩土应力比、荷载分担比及其变化规律。试验结果表明:孔内深层强夯复合地基的桩间土承担了主要的上部荷载,约占50%~63%,随着荷载增大,桩间土承担的荷载比例逐步增大;对于孔内深层强夯复合地基,随着荷载的增大,桩土应力比随荷载的增大而减小,数值介于2~5之间;对粘性素填土地基,孔内深层强夯复合地基在处理后的桩间土地基承载力比处理前可提高220%。
- Abstract:
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By conducting on-site static load tests and pile-soil stress tests on the composite foundation with down-hole dynamic compaction, the average pile top stress, soil stress between piles, pile-soil stress ratio, load sharing ratio,and their variation patterns of the deep dynamic compaction composite foundation in the hole under different loads were obtained. The test results show that: the soil between piles of the deep dynamic compaction composite foundation in the hole bears the main upper load, accounting for about 50%-63%. As the load increases, the proportion of load borne by the soil between piles gradually increases; for the deep dynamic compaction composite foundation in the hole,the pile-soil stress ratio decreases with the increase of load,with a value between 2 and 5; for foundation with cohesive plain soil filling, the bearing capacity of the deep dynamic compaction composite foundation in the hole after treatment can be increased by 220% compared with that before treatment.
参考文献/References:
[1]徐至钧,司炳文.地基处理新技术——孔内深层强夯[M].北京:中国建筑工业出版社,2011.
[2]吕文龙,沈仁良,王凯.孔内深层强夯法施工参数对珠江三角洲地区地基处理效果影响的试验研究[J].华南地震, 2023,43(2):125-131.
[3]俞宗卫,许魁,张小伟.孔内深层强夯法在湿陷性黄土地区工程中的应用[J].建筑结构,2009,39(01):96-98.
[4]赵治海,徐张建,燕建龙,等.湿陷性黄土场地孔内深层强夯挤密桩试验研究[J].地下空间与工程学报,2020,16 (04):1004-1011.
[5]毛正君,陶志怀,魏荣誉,等. SDDC桩结合灌注桩的垃圾填埋场地基处理施工技术[J].施工技术,2016,45(13):72-74.
[6]彭明清.自动脱挂钩技术条件下SDDC桩复合地基承载性能研究[D].西安:西安建筑科技大学,2016.
[7]中华人民共和国住房和城乡建设部.建筑地基基础设计规范:GB 50007-2011[S].北京:中国建筑工业出版社, 2012.
[8]广东省住房和城乡建设厅.建筑地基基础检测规程:DBJ/T 15-60-2019[S].北京:中国城市出版社,2019.
备注/Memo
- 备注/Memo:
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收稿日期:2023-12-30
基金项目:住房与城乡建设部科技计划资助项目(2017-k10-006)
作者简介:吕文龙(1981-),男,博士,正高级工程师,一级注册结构工程师,注册岩土工程师,主要从事建筑地基基础方面的研究。E-mail:midworm@163.com
更新日期/Last Update:
2024-03-30