[1]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,(02):125-131.[doi:10.13512/j.hndz.2023.02.14]
 LYU Wenlong,SHEN Renliang,WANG Kai.Experimental Study on the Influence of Construction Parameters of Down-hole Dynamic Compaction on the Foundation Treatment Effect in the Pearl River Delta Region[J].,2023,(02):125-131.[doi:10.13512/j.hndz.2023.02.14]
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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()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2023年02期
页码:
125-131
栏目:
土木工程防震减灾
出版日期:
2023-06-20

文章信息/Info

Title:
Experimental Study on the Influence of Construction Parameters of Down-hole Dynamic Compaction on the Foundation Treatment Effect in the Pearl River Delta Region
文章编号:
1001-8662(2023)02-0125-07
作者:
吕文龙沈仁良王 凯
广东省建筑科学研究院集团股份有限公司,广州 510000
Author(s):
LYU WenlongSHEN RenliangWANG Kai
Guangdong Provincial Academy of Building Research Group Co.,Ltd.,Guangzhou 510000,China
关键词:
孔内深层强夯法地基处理平板载荷试验试验研究
Keywords:
Down-hole dynamic compaction method Foundation treatment Plate loading test Experimental study
分类号:
TU751+.4
DOI:
10.13512/j.hndz.2023.02.14
文献标志码:
A
摘要:
为了解珠江三角洲地区孔内深层强夯施工参数对地基处理效果的影响,结合现场试验,通过改变地基处理时孔内深层强夯的夯击次数、夯击能和持力层情况,研究了不同施工参数的影响情况,结果表明:适当增加夯击次数,能有效提高孔内深层强夯法对地基的处理效果,在300kPa试验荷载下,夯击次数为5次的测点沉降量比夯击次数为4次的减小了31.5%,夯击次数为6次的测点沉降量比夯击次数为4次的减小了55.2%;当夯击能超过一定数值后,工后沉降量不一定显著减小,在300kPa试验荷载下,夯击能为1000kN·m的测点沉降量比夯击能为800kN·m的增大了55.7%;孔内深层强夯桩体的持力层力学性质越好,工后沉降量越小,在300kPa试验荷载下,持力层为全风化花岗岩的测点沉降量比持力层为淤泥层的减小55%。
Abstract:
In order to understand the influence of construction parameters of down-hole dynamic compaction on the foundation treatment effect in the Pearl River Delta region, combined with field tests, this paper studies the influence of different construction parameters by changing the tamping times,tamping energy and bearing stratum of down-hole dynamic compaction during foundation treatment. The results show that appropriately increasing tampering times can effectively improve the treatment effect of the down-hole dynamic compaction on foundation.Under the test load of 300 kPa,the settlement of the measuring point with 5 times of tamping is 31.5 % lower than that with 4 times of tamping, and the settlement of the measuring point with 6 times of tamping is 55.2 % lower than that with 4 times of tamping. Not the greater the tamping energy is, the better the settlement is. When the tamping energy exceeds a certain value, the post-construction settlement does not necessarily decrease significantly. Under the test load of 300 kPa,the settlement of the measuring point with the tamping energy of 1000 kN·m is 55.7 % higher than that with the tamping energy of 800 kN·m. The better the mechanical properties of the bearing stratum of the deep dynamic compaction pile in the hole,the smaller the post-construction settlement. Under the test load of 300 kPa,the settlement of the measuring point of the fully weathered granite is 55 % lower than that of the silt layer.

参考文献/References:

[1]顾欣,邹立华,马文祥.孔内深层强夯(孔内深层强夯法)振动试验研究[J].兰州铁道学院学报,2000,19(1):17-20.[2]司炳文,唐业清.孔内深层强夯技术的机理与工程实践[J].施工技术,1999,28(5):48-49.[3]徐至均.强夯技术的新发展—孔内深层强夯[J].石油工程建设,1999(5):7-10.[4]北京交通大学.孔内深层强夯法技术规程:CECS197-2006 [S].北京:中国计划出版社,2006.[5]陈方明,关立军,刘晓华.大厚度自重湿陷性黄土场地孔内深层强夯法的应用月开究[J]. 兰州铁道学院学报, 2007,23(5):49-52.[6]李清火,张浩杰.孔内深层强夯法在湿陷性黄土地基中的应用[J].建筑科学,2011,27(1):103-105.[7]孙青娟.孔内深层强夯法及其多桩型复合地基的加固机理及应用研究[D].西安:西安建筑科技大学,2013.[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].广州:广东省建筑科学研究院,2019.

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备注/Memo

备注/Memo:
收稿日期:2022-10-15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,教授级高级工程师,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: 2023-06-15