控制剩余湿陷量的黄土地基深层浸水试验研究

摘要
图/表
参考文献(20)
相关文章 (15)

全文: PDF (806 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要选用4个不同处理深度的灰(素)土桩对大厚度自重湿陷性黄土场地进行挤密处理，并对挤密区域以下未处理土层进行深层浸水试验，研究在该浸水条件下大厚度自重湿陷性黄土地基的湿陷变形规律、处理深度和剩余湿陷量合理控制等问题。试验结果表明：灰土和素土在处理大厚度自重湿陷性黄土地基时，两者挤密效果表现差异不大；深层浸水情况下，6～15 m深度处理区域产生的变形量均不能满足上部荷载的变形要求，且呈现三段式变形规律，先期稳定，中期缓降，后期突降；根据现场浸水试验和桩基中性点相关研究，首次提出大厚度自重湿陷性黄土地区“湿陷临界深度”的概念，并初步将其确定为20～25 m，据此可以一定程度上减小深部土层剩余湿陷量，达到减小地基处理深度的目的；建议将15～20和10～15 m分别作为大厚度自重湿陷性黄土地基乙、丙类建筑的最大处理深度。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	姚志华1
	2
	黄雪峰1
	3
	陈正汉1
	3
	方祥位1
	苗强强1

关键词 ：土力学, 大厚度自重湿陷性黄土, 挤密桩, 深层浸水试验, 湿陷变形, 剩余湿陷量

Abstract：A site of self-weight collapse loess with heavy section is treated by four treating depths of lime soil(pure soil) compaction pile；and beneath the compaction reign，deep soaking test on the untreated loess is carried out in order to research the law of collapse deformation，treating depth and reasonable limit of remnant collapse of the self- weight collapse loess with heavy section in this soaking condition. The results show that，when the foundation of self-weight collapse loess with heavy section is treated with lime soil and pure soil，the compaction effects of lime soil and pure soil have little difference. In case of deep soaking，the deformation in treated region with 6–15 m depths cannot meet loess codes demands about upper load and presents a triple-section law：stable in the first test stage，slowly decreasing in middle stage，and suddenly dropping in later stage. According to the correlated researches of field soaking tests and neutral point of pile foundation，the concept of critical collapsibility depth of self-weight collapse loess with heavy section has been proposed firstly；and the critical depth is set as 20–25 m temporarily. In this way，the remnant collapse of deep loess layer can be decreased to certain degree；and the aim to limit treating depth of loess foundation is achieved. It is suggested that 15–20 and 10–15 m can be set respectively as the maximum treating depth of class B and C building in self-weight collapse loess area with heavy section.

Key words： soil mechanics self-weight collapse loess with heavy section compaction pile deep soaking test collapse deformation remnant collapse

引用本文:

姚志华1，2，黄雪峰1，3，陈正汉1，3，方祥位1，苗强强1. 控制剩余湿陷量的黄土地基深层浸水试验研究[J]. 岩石力学与工程学报, 2013, 32(s2): 4010-4018.
YAO Zhihua1，2，HUANG Xuefeng1，3，CHEN Zhenghan1，3，FANG Xiangwei1，MIAO Qiangqiang1. DEEP SOAKING TEST STUDY OF COLLAPSIBLE LOESS FOUNDATION CONTROLLING REMNANT COLLAPSE. , 2013, 32(s2): 4010-4018.

链接本文:

https://rockmech.whrsm.ac.cn/CN/Y2013/V32/Is2/4010

[1]	黄雪峰，陈正汉，方祥位. 关于大厚度自重湿陷性黄土地基处理的若干问题探讨[J]. 后勤工程学院学报，2007，23(4)：39-44. (HUANG Xuefeng，CHEN Zhenghan，FANG Xiangwei. Study on the treatment deepness and method of foundation of self weight collapse loesswith big thickness[J]. Journal of Logistical Engineering University，2007，23(4)：39-44.(inChinese))
[2]	汪国烈. 自重湿陷性黄土的试验研究：试坑浸水及载荷试验报告[R].兰州：甘肃省建筑科学研究所，1975：5-15.(WANGGuolie. Research of self-weight collapse loess：report aboutsoaking and loading test)[R]. Lanzhou：Gansu Building Research Institute，1975：5-15.(inChinese))
[3]	钱鸿缙，朱梅，谢爽. 河津黄土地基湿陷变形试验研究[J]. 岩土工程学报，1992，14(6)：1-9.(QIANHongjin，ZHUMei，XIE Shuang. Experimentalstudy on the regularities of collapsible deformation of loessfoundation in Hejin，Shanxi[J].Chinese Journal ofGeotechnical Engineering，1992，14(6)：1-9.(inChinese))
[4]	李大展，何颐华，隋国秀. Q2黄土大面积浸水试验研究[J]. 岩土工程学报，1993，15(2)：1-11.(LI Dazhan，HE Yihua，SUI Guoxiu. Study and test on immersion of Q2loess inlarge area[J]. Chinese Journal of Geotechnical Engineering，1993，15(2)：1-11.(in Chinese))
[5]	罗宇生，宝鸡第二发电厂大面积试坑浸水试验报告[R]. 西安：西北电力设计院，1994：15-26.(Luo Yusheng. Large area soaking testreport of Baoji second power plant[R]. Xi’an：Northwest Electric Design Institute，1994：15-26.(inChinese))
[6]	黄雪峰，陈正汉，哈双，等. 大厚度自重湿陷性黄土场地湿陷变形特征的大型现场浸水试验研究[J]. 岩土工程学报，2006，28(3)：382-389.(HUANG Xuefeng，CHEN Zhenghan，HA Shuang，et al. Large area field immersion test on characteristics of deformation of self weight collapse loessunder overburden pressure[J].Chinese Journal ofGeotechnical Engineering，2006，28(3)：382-389.(in Chinese))
[7]	姚志华，黄雪峰，陈正汉，等. 兰州地区大厚度自重湿陷性黄土场地浸水试验综合观测研究[J]. 岩土工程学报，2012，34(1)：65-74. (YAO Zhihua，HUANG Xuefeng，CHEN Zhenghan，et al. Comprehensive investigation of soaking test of self-weight collapse loess with heavy section in Lanzhou region[J]. Chinese Journal of Geotechnical Engineering，2012，34(1)：65-74.(in Chinese))
[8]	罗宇生. 湿陷性黄土地基处理[M]. 北京：中国建筑工业出版社，2008：5-10.(LUO Yusheng. Collapsible loess foundation treatment[M]. Beijing：China Architecture and Building Press，2008：5-10.(in Chinese))
[9]	汪国烈. 自重湿陷性黄土土桩挤密地基的试验研究[R]. 兰州：甘肃省建筑科学研究所，1979：3-6.(WANGGuolie. Research ofpacked soil compaction pile foundation of self-weight collapse loess[R]. Lanzhou：Gansu Building ResearchInstitute，1979：3-6.(inChinese))
[10]	汪国烈. 自重湿陷性黄土挤密地基的试验研究[R]. 兰州：甘肃省建筑科学研究所，1982：16-20.(WANGGuolie. Research of compaction pile foundation of self-weight collapse loess[R]. Lanzhou：Gansu Building ResearchInstitute，1982：16-20.(inChinese))
[11]	钱鸿缙，罗宇生. 湿陷性黄土地基[M]. 北京：中国建筑工业出版社，1985：5-14.(QIAN Hongjin，LUO Yusheng. Collapsed loess foundation[M]. Beijing：China Architecture and Building Press，1985：5-14.(in Chinese))
[12]	罗宇生，刘航校. 湿陷性黄土地基处理后的剩余湿陷量对建筑物的损坏情况[J]. 陕西建筑，2006，5(3)：32-33.(LUO Yusheng，LIU Hangxiao. Damage of remnantcollapse of collapsed loess foundation after treatmentto buildings[J].Shaanxi Architecture，2006，5(3)：32-33.(in Chinese))
[13]	张豫川，赵伟，熊靖辉. 大厚度湿陷性黄土场地地基处理合理深度[J]. 兰州大学学报：自然科学版，2009，45(2)：31-35.(ZHANG Yuchuan，ZHAO Wei，XIONG Jinghui.Reasonable treatment depth for foundation ofcollapsing loess with a large thickness[J].Journal of Lanzhou University：Natural Sciences，2009，45(2)：31-35.(in Chinese))
[14]	黄雪峰，陈正汉，方祥位，等. 大厚度自重湿陷性黄土地基处理厚度与处理方法研究[J]. 岩石力学与工程学报，2007，26(增2)：4332-4338.(HUANG Xuefeng，CHEN Zhenghan，FANG Xiangwei，et al.Study on foundation treatment thickness and treatmentmethod for collapse loess with large thickness[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(Supp.2)：4332-4338.(in Chinese))
[15]	中华人民共和国国家标准. GB50025—2004湿陷性黄土地区建筑规范[S]. 北京：中国建筑工业出版社，2004.(The National Standards Compilation Group of People¢s Republic of China. GB50025—2004 Code for building construction in collapsible loessregions[S]. Beijing：China Architecture and Building Press，2004.(in Chinese))
[16]	中华人民共和国国家标准. GB50202—2002建筑地基基础工程施工质量验收规范[S]. 北京：中国建材工业出版社，2002.(The National Standards Compilation Group of People¢s Republic of China. GB50202—2002Code for acceptance of construction quality of building foundation[S]. Beijing：China Building Material Industry Publishing House，2002.(in Chinese))
[17]	刘志伟. 兰州地区湿陷性黄土工程特性综合评价与地基处理试验研究[R]. 西安：西北电力设计院，2009：67-89.(LIU Zhiwei. Comprehensive evaluation of engineering properties and foundation treatment test of self-weight collapse loess in Lanzhou region[R]. Xi¢an：Northwest Electric Design Institute，2009：67-89.(inChinese))
[18]	郑建国. 新建铁路郑州至西安客运专线湿陷性黄土区桥梁桩基试验研究总报告[R]. 西安：机械工业勘察设计研究院，2007：96-112.(ZHENG Jianguo. New construction of Zhenzhou—Xi’anpassenger transport private lineofbridge pile foundation in collapsible loessregion：research general report[R]. Xi’an：China Survey and Design Instituteof Machinery Industry，2007：96-112.(inChinese))
[19]	黄雪峰，陈正汉，哈双，等. 大厚度自重湿陷性黄土中灌注桩承载性状与负摩阻力的试验研究[J]. 岩土工程学报，2007，29(3)：338-349.(HUANG Xuefeng，CHEN Zhenghan，HA Shuang，et al. Research on bearing behaviors and negative friction force for filling piles in the siteof collapsible loess with big thickness[J]. Chinese Journal of Geotechnical Engineering，2007，29(3)：338-349.(in Chinese))
[20]	黄雪峰，张广平，姚志华，等. 大厚度自重湿陷性黄土湿陷变形特性水分入渗规律及地基处理方法研究[J]. 岩土力学，2011，32(增2)：100-108.(HUANG Xuefeng，ZHANG Guangping，YAO Zhihua，et al. Research on deformation，permeability regularity and foundation treatmentmethod of dead-weight collapse loess with heavy section[J]. Rock and Soil Mechanics，2011，32(Supp.2)：100-108.(in Chinese))