合肥滨湖新区静压管桩单桩极限承载力与终压力关系的载荷试验研究
|
摘要
以合肥滨湖某安置房项目PHC管桩加固工程为依托,利用PHC静压管桩的载荷试验,对静压管桩的单桩极限承载力Qu、静压管桩施工中的终压力Pu进行了研究。得到以碎石层为持力层时,单桩极限承载力与终压力之间的关系,单桩竖向极限承载力小于终压力,且为终压力的60%~90%;通过对长径比(L/d)与压力比(Qu/Pu)进行回归分析,发现两者大致呈双曲线关系。建立了静压管桩单桩极限承载力与终压力之间关系的地区经验公式,便于在静压管桩施工中更加可靠地控制终压力。
Taking PHC pipe reinforcement engineering of a resettlement housing project in Hefei lakeside new district as background,based on load experiment of PHC pile subjected to static pressure,ultimate bearing capacity of single pile Qu and terminative jacking force Pu are experimentally studied,respectively.Relation between the ultimate bearing capacity of single pile and the terminative jacking force was obtained for gravel layer bearing stratum.The value of vertical ultimate bearing capacity of single pile is less than that of terminative jacking force,and former is only60%to 90% of latter.Regression analysis of length to diameter ratio(L/d)and pressure ratio(Qu/Pu)indicates that both present roughly hyperbolic relation.A regional empirical formula describing relation between the ultimate bearing capacity of static pressured pipe and the terminative jacking force was established to more reliably control terminative jacking force in PHC pipe reinforcement engineering.
Taking PHC pipe reinforcement engineering of a resettlement housing project in Hefei lakeside new district as background,based on load experiment of PHC pile subjected to static pressure,ultimate bearing capacity of single pile Qu and terminative jacking force Pu are experimentally studied,respectively.Relation between the ultimate bearing capacity of single pile and the terminative jacking force was obtained for gravel layer bearing stratum.The value of vertical ultimate bearing capacity of single pile is less than that of terminative jacking force,and former is only60%to 90% of latter.Regression analysis of length to diameter ratio(L/d)and pressure ratio(Qu/Pu)indicates that both present roughly hyperbolic relation.A regional empirical formula describing relation between the ultimate bearing capacity of static pressured pipe and the terminative jacking force was established to more reliably control terminative jacking force in PHC pipe reinforcement engineering.
引文
[1]Gavin Kenneth G,O’Kelly Brendan C.Effect of friction fatigue on pile capacity in dense sand[J].Journal of Geotechnical and Geo-environmental Engineering,2007,133(1):63-71.
[2]张忠苗.桩基工程[M].北京:中国建筑工业出版社,2007(Zhang Zhongmiao.Pile foundation engineering[M].Beijing:China Construction Industry Press,2007(in Chinese))
[3]刘俊龙.砾卵石层中预制桩的承载性状研究[J].岩土力学,2008,29(5):1280-1284(Liu Junlong.Research on bearing capacity behavior of precast concrete piles in gravel stratum[J].Rock and Soil Mechanics,2008,29(5):1280-1284(in Chinese))
[4]张明义.静力压入桩的研究与应用[M].北京:中国建材工业出版社,2004(Zhang Mingyi.Research and application of jacked pile[M].Beijing:China Construction Material Industry Press,2004(in Chinese))
[5]刘俊伟.静压桩沉桩过程及承载力性状研究[D].青岛理工大学,2008(Liu Junwei.Study on installation and bearing capacity character of jacked pile[D].Qingdao Technological University,2008(in Chinese))
[6]张忠苗,刘俊伟,俞峰等.静压管桩终压力与极限承载力的相关关系研究[J].岩土工程学报,2010,32(8):1207-1213.(Zhang Zhongmiao,Liu Junwei,Yu Feng,et al.Relationship between terminative jacking force and ultimate bearing capacity of jacked pipe piles[J].Chinese Journal of Geotechnical Engineering,2010,32(8):1207-1213(in Chinese))
[7]王俊林,王志宽,马艳.静压管桩单桩极限承载力与终压力关系的探讨[J].岩土力学,2008,29(S1):631-634(Wang Junlin,Wang Zhikuan,Ma Yan.Relationship between ultimate bearing capacity of single pile and final pressure of static pressure pipe pile[J].Rock and Soil Mechanics,2008,29(S1):631-634(in Chinese))
[8]孙文怀,魏厚峰,郝小红等.郑州地区静压管桩单桩极限承载力与终压力关系[J].水文地质工程地质,2009,36(4):100-101(Sun Wenhuai,Wei Houfeng,Hao Xiaohong,et al.Relationship between ultimate bearing capacity of single pile and final pressure of static pressure pipe pile in Zhenzhou area[J].Hydrogeology and Engineering Geology,2009,36(4):100-101(in Chinese))
[9]赵俭斌,阮翔,孙传胤等.辽沈地区静压管桩终压力与单桩极限承载力的关系研究[J].沈阳建筑大学学报(自然科学版),2005,21(4):302-305(Zhao Jianbin,Ruan Xiang,Sun Chuanyin,et al.Research on the Relationship between the final pressure of static pressure pile in Liao-Shen area and the ultimate bearing capacity of single pile[J].Journal of Shenyang Jianzhu University(Natural Science),2005,21(4):302-305(in Chinese))
[10]高红影,左宏亮,庄超.大庆粘性土地区静压PHC管桩竖向极限承载力与终压力关系研究[J].低温建筑技术,2011(4):102-103,120(Gao Hongying,Zuo Hongliang,Zhuang Chao.Study on relationship of vertical ultimate bearing capacity and final pressure of jack-in PHC pipe pile in Daqing cohesive soil region[J].Low Temperature Architecture Technology,2011(4):102-103,120(in Chinese))
[11]左宏亮,刘景云,李国东等.松花江漫滩地区静压PHC管竖向承载力研究[J].沈阳建筑大学学报(自然科学版),2009,25(6):1088-1093(Zuo Hongliang,Liu Jingyun,Li Guodong,et al.Study on vertical bearing capacity of jacked-in PHC pipe pile in Songhua river floodplain areas[J].Journal of Shenyang Jianzhu University(Natural Science),2009,25(6):1088-1093(in Chinese))
[12]蒋跃楠,韩选江.静压桩终压力及单桩竖向承载力的相关性[J].南京工业大学学报(自然科学版),2006,28(5):63-66(Jiang Yuenan,Han Xuanjiang.Relativity between final pressure and vertical bearing capacity of static-pressed pile[J].Journal of Nanjing University of Technology,2006,28(5):63-66(in Chinese))
[13]中华人民共和国住房和城乡建设部.JGJ106-2014建筑桩基检测技术规范[S].北京:中国建筑工业出版社,2014.
[2]张忠苗.桩基工程[M].北京:中国建筑工业出版社,2007(Zhang Zhongmiao.Pile foundation engineering[M].Beijing:China Construction Industry Press,2007(in Chinese))
[3]刘俊龙.砾卵石层中预制桩的承载性状研究[J].岩土力学,2008,29(5):1280-1284(Liu Junlong.Research on bearing capacity behavior of precast concrete piles in gravel stratum[J].Rock and Soil Mechanics,2008,29(5):1280-1284(in Chinese))
[4]张明义.静力压入桩的研究与应用[M].北京:中国建材工业出版社,2004(Zhang Mingyi.Research and application of jacked pile[M].Beijing:China Construction Material Industry Press,2004(in Chinese))
[5]刘俊伟.静压桩沉桩过程及承载力性状研究[D].青岛理工大学,2008(Liu Junwei.Study on installation and bearing capacity character of jacked pile[D].Qingdao Technological University,2008(in Chinese))
[6]张忠苗,刘俊伟,俞峰等.静压管桩终压力与极限承载力的相关关系研究[J].岩土工程学报,2010,32(8):1207-1213.(Zhang Zhongmiao,Liu Junwei,Yu Feng,et al.Relationship between terminative jacking force and ultimate bearing capacity of jacked pipe piles[J].Chinese Journal of Geotechnical Engineering,2010,32(8):1207-1213(in Chinese))
[7]王俊林,王志宽,马艳.静压管桩单桩极限承载力与终压力关系的探讨[J].岩土力学,2008,29(S1):631-634(Wang Junlin,Wang Zhikuan,Ma Yan.Relationship between ultimate bearing capacity of single pile and final pressure of static pressure pipe pile[J].Rock and Soil Mechanics,2008,29(S1):631-634(in Chinese))
[8]孙文怀,魏厚峰,郝小红等.郑州地区静压管桩单桩极限承载力与终压力关系[J].水文地质工程地质,2009,36(4):100-101(Sun Wenhuai,Wei Houfeng,Hao Xiaohong,et al.Relationship between ultimate bearing capacity of single pile and final pressure of static pressure pipe pile in Zhenzhou area[J].Hydrogeology and Engineering Geology,2009,36(4):100-101(in Chinese))
[9]赵俭斌,阮翔,孙传胤等.辽沈地区静压管桩终压力与单桩极限承载力的关系研究[J].沈阳建筑大学学报(自然科学版),2005,21(4):302-305(Zhao Jianbin,Ruan Xiang,Sun Chuanyin,et al.Research on the Relationship between the final pressure of static pressure pile in Liao-Shen area and the ultimate bearing capacity of single pile[J].Journal of Shenyang Jianzhu University(Natural Science),2005,21(4):302-305(in Chinese))
[10]高红影,左宏亮,庄超.大庆粘性土地区静压PHC管桩竖向极限承载力与终压力关系研究[J].低温建筑技术,2011(4):102-103,120(Gao Hongying,Zuo Hongliang,Zhuang Chao.Study on relationship of vertical ultimate bearing capacity and final pressure of jack-in PHC pipe pile in Daqing cohesive soil region[J].Low Temperature Architecture Technology,2011(4):102-103,120(in Chinese))
[11]左宏亮,刘景云,李国东等.松花江漫滩地区静压PHC管竖向承载力研究[J].沈阳建筑大学学报(自然科学版),2009,25(6):1088-1093(Zuo Hongliang,Liu Jingyun,Li Guodong,et al.Study on vertical bearing capacity of jacked-in PHC pipe pile in Songhua river floodplain areas[J].Journal of Shenyang Jianzhu University(Natural Science),2009,25(6):1088-1093(in Chinese))
[12]蒋跃楠,韩选江.静压桩终压力及单桩竖向承载力的相关性[J].南京工业大学学报(自然科学版),2006,28(5):63-66(Jiang Yuenan,Han Xuanjiang.Relativity between final pressure and vertical bearing capacity of static-pressed pile[J].Journal of Nanjing University of Technology,2006,28(5):63-66(in Chinese))
[13]中华人民共和国住房和城乡建设部.JGJ106-2014建筑桩基检测技术规范[S].北京:中国建筑工业出版社,2014.