大型油罐CFG桩复合地基变形与承载性能试验研究

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (981 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要兰州原油末站大型油罐群，是我国首次在饱和黄土地基修建的大型储油设施。由于天然饱和黄土地基承载力仅为60 kPa，采用CFG 桩复合地基。依托其中一座15×104 m3储油罐工程开展CFG桩复合地基变形与承载特性试验研究。在地基处理范围内埋设土压力盒、孔隙水压计、沉降计等测试元件。现场试验结果表明，CFG桩复合地基承载力特征值达到275 kPa。结合罐体充水试验研究CFG桩复合地基在罐体充水过程中桩土应力、孔隙水压力、沉降及油罐环墙基础变形的变化规律。结果表明，环墙基础最大沉降量为30 mm，最小为11 mm。实测油罐任意直径方向的沉降差最大值为16.0 mm，油罐沿周边弧长方向最大非平面倾斜值为0.002 46。CFG桩桩土应力比随荷载呈增大趋势，在最大试验荷载下达到12.6，油罐底部反力沿半径方向呈“V”型分布。研究表明采用CFG桩处理饱和黄土地基是可行的，试验研究成果对饱和黄土地基修建大型储油罐提供技术依据。

	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

关键词 ：地基处理, CFG桩复合地基, 大型油罐, 变形特性, 承载力

Abstract：The oil storage tanks of the Terminal Oil Station in Lanzhou are the first large oil storage facilities built on saturated loess ground in China. Cement-flyash-gravel(CFG) piles were adopted to improve the foundation due to its low bearing capacity of approximately 60 kPa. Based on a oil storage tank of 15×104 m3 in volume，experimental study was performed to explore the bearing and deformation features of the CFG-pile composite ground. Soil pressure cells，pore water pressure gauges and settlement meters were installed in the CFG-pile composite ground. Field testing results show that the bearing capacity of the CFG-pile composite foundation reaches 275 kPa. The water filling test of the tank reveals the varying processes of the pile stress，soil stress，pore water pressure，ground settlement and the deformation of the tank's circular foundation. It is indicated that the maximum settlement of the tank's circular foundation is 30 mm while the minimum settlement is 11 mm. The maximum differential settlement of the tank in the diametral direction is 16.0 mm；the maximum nonplanar tilting rate of the tank in the circumferential direction is 0.002 46. The ratio of the pile stress to the soil stress rises as the load increases and reaches 12.6 under the maximum test loading；the soil reaction distribution at the tank bottom takes on a V-shape in the radial direction. The results show that it is effective to improve saturated loess ground by CFG pile.

Key words： ground improvement CFG-pile composite ground large oil tank deformation feature bearing capacity

收稿日期: 2013-05-02

引用本文:

丁小军1，2，王旭1，张延杰1，蒋代军1，刘德仁1. 大型油罐CFG桩复合地基变形与承载性能试验研究[J]. 岩石力学与工程学报, 2013, 32(9): 1851-1857.
DING Xiaojun1，2，WANG Xu1，ZHANG Yanjie1，JIANG Daijun1，LIU Deren1. EXPERIMENTAL STUDY OF BEARING AND DEFORMATION FEATURES OF CFG-PILE COMPOSITE GROUND FOR LARGE OIL STORAGE TANKS. , 2013, 32(9): 1851-1857.

链接本文:

http://www.rockmech.org/CN/Y2013/V32/I9/1851

[1]	徐至钧，许朝铨，沈珠江. 大型储罐地基基础设计与地基处理[M]. 北京：中国石化出版社，1999：5-15.(XU Zhijun，XU Chaoquan，SHEN Zhujiang. Ground treatment and foundation design method for large oil tank[M]. Beijing：China Petrochemincal Press，1999：5-15.(in Chinese)) " target="_blank">
[5]	阎明礼，张东刚. CFG桩复合地基技术及工程实践[M]. 北京：中国水利水电出版社，2001：1-6.(YAN Minglin，ZHANG Donggang. CFG pile composite foundation technology and engineering practice[M]. Beijing：China Water Power Press，2001：1-6.(in Chinese)) " target="_blank">
[9]	李昌宁，王炳龙，周顺华. CFG桩-网复合结构软基加固技术及其实际应用[J]. 铁道工程学报，2006，(1)：27-31.(LI Changning，WANG Binglong，ZHOU Shunhua. Reinforcement technique for subgrade in soft soil zone by composite structure of CFG pile- net and its application[J]. Journal of Railway Engineering Society，2006，(1)：27-31.(in Chinese)) " target="_blank">
[13]	应宏伟，杨晓刚，卞守中，等. 大型油罐地基现场试验分析[J]. 岩土工程学报，2005，27(2)：157-161.(YING Hongwei，YANG Xiaogang，BIAN Shouzhong，et. al. Analysis of field test on the foundation of a large oil tank[J]. Chinese Journal of Geotechnical Engineering，2005，27(2)：157-161(in Chinese))
[2]	翟振远. 大型储罐地基基础设计方法研究[硕士学位论文][D]. 大庆：大庆石油学院，2007.(ZHAI Zhenyuan. Research on ground and foundation design method of large oil tank[M. S. Thesis][D]. Daqing：Northeast Petroleum University，2007.(in Chinese)) " target="_blank">
[4]	吴国义. CFG桩加振冲碎石桩复合地基在湛江东兴12.5×104 m3超大型油罐地基中的综合应用[J]. 岩土工程界，2004，(7)：49-52.(WU Guoyi. Application of CFG and vibro-replacement stone column composite foundation for 12.5×104 m3 large oil tank in Zhanjiang[J]. Geotechnical Engineering World，2004，(7)：49-52.(in Chinese)) " target="_blank">
[6]	龚晓南. 复合地基理论及工程应用[M]. 北京：中国建筑工业出版社，2002：3-17.(GONG Xiaonan. Theories and engineering applications of composite foundation[M]. Beijing：China Architecture and Building Press，2002：3-17.(in Chinese)) " target="_blank">
[8]	徐毅，洪宝宁，符新军，等. CFG桩复合地基加固高速公路软基的现场试验研究[J]. 防灾减灾工程学报，2006，26(3)：305-308.(XU Yi，HONG Baoning，FU Xinjun，et. al. In-situ experiments of CFG pile composite foundation for strengthening soft foundations of highway[J]. Journal of Disaster Prevention and Mitigation Engineering，2006，26(3)：305-308.(in Chinese)) " target="_blank">
[10]	中油四维工程勘察有限公司. 西部原油成品油管道工程兰州原油末站(罐区)岩土工程勘察报告[R]. 廊坊：中油四维工程勘察有限公司，2005.(Siwei Engineering Survey Company of China Petroleum. Geotechnical survey report of Lanzhou oil and petroleum terminal of pipeline engineering project[R]. Lanfang：Siwei Engineering Survey Company of China Petroleum，2005.(in Chinese)) " target="_blank">
[12]	中华人民共和国行业标准编写组. SH/T3123—2001 石油化工钢储罐地基充水预压监测规程[S]. 北京：中国石化出版社，2002.(The Professional Standards Compilation Group of People?s Republic of China. SH/T3123—2001 Petrochemical monitoring code for controlled water test to preload steel storage tanks subgrade[S]. Beijing：China Petrochemical Press，2002.(in Chinese)) " target="_blank">
[14]	中华人民共和国行业标准编写组. SH/T 3068—2007石油化工企业钢储罐地基与基础设计规范[S]. 北京：中国石化出版社，2008.(The Professional Standards Compilation Group of People?s Republic of China. SH/T 3068—2007 Specification for design of steel storage tanks subgrade and foundation in petrochemical industry[S]. Beijing：China Petrochemical Press，2008.(in Chinese)) " target="_blank">
[3]	赵同顺，周波. 大型油罐地基变形特性的研究[J]. 岩石力学与工程学报，2004，23(6)：1 037-1 043.(ZHAO Tongshun，ZHOU Bo. Deformation behaviors of soft foundation under large oil tank[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(6)：1 037-1 043.(in Chinese)) " target="_blank">
[7]	陈东佐，梁仁旺. CFG桩复合地基的试验研究[J]. 建筑结构学报，2002，23(4)：71-74.(CHEN Dongzuo，LIANG Renwang. Experiment study on CFG pile composite foundation[J]. Journal of Building Structures，2002，23(4)：71-74.(in Chinese))
[11]	王长丹，王旭，聂彪，等. 高饱和度黄土地基超大型储油罐CFG桩复合地基承载性能试验研究[J]. 水利与建筑工程学报，2008，6(3)：47-50.(WANG Changdan，WANG Xu，NIE Biao，et al. Experimental study on bearing performance of CFG pile composite foundation of large oil tank in saturated loess stratum[J]. Journal of Water Resources and Architectural Engineering，2008，6(3)：47-50.(in Chinese)) " target="_blank">