湖南工业大学学报
湖南工業大學學報
호남공업대학학보
JOURNAL OF HUNAN UNIVERSITY OF TECHNOLOGY
2015年
1期
24-28
,共5页
黄礼胜%崔斌%何爱波%王亚辉%黄福安
黃禮勝%崔斌%何愛波%王亞輝%黃福安
황례성%최빈%하애파%왕아휘%황복안
阶梯形变截面管桩%复合地基%荷载- 沉降%桩身荷载传递规律
階梯形變截麵管樁%複閤地基%荷載- 沉降%樁身荷載傳遞規律
계제형변절면관장%복합지기%하재- 침강%장신하재전체규률
ladder variable section pipe pile%composite foundation%load-settlement%pile load transferring law
为探讨阶梯型变截面管桩复合地基的承载特性及优点,进行了2组等截面管桩复合地基和3组阶梯形变截面管桩复合地基承载性状的室内大比例模型对比试验。试验结果表明:在相同荷载作用下,阶梯形变截面管桩及其复合地基的沉降明显低于等截面管桩及其复合地基的沉降。在管桩材料用量及所处的地质条件相同的情况下,阶梯形变截面管桩单桩刚度明显大于等截面管桩的单桩刚度。阶梯形变截面管桩桩身强度能较好地与桩身轴力变化规律协调。因此,采用阶梯形变截面管桩能充分利用桩身强度,降低桩基造价。
為探討階梯型變截麵管樁複閤地基的承載特性及優點,進行瞭2組等截麵管樁複閤地基和3組階梯形變截麵管樁複閤地基承載性狀的室內大比例模型對比試驗。試驗結果錶明:在相同荷載作用下,階梯形變截麵管樁及其複閤地基的沉降明顯低于等截麵管樁及其複閤地基的沉降。在管樁材料用量及所處的地質條件相同的情況下,階梯形變截麵管樁單樁剛度明顯大于等截麵管樁的單樁剛度。階梯形變截麵管樁樁身彊度能較好地與樁身軸力變化規律協調。因此,採用階梯形變截麵管樁能充分利用樁身彊度,降低樁基造價。
위탐토계제형변절면관장복합지기적승재특성급우점,진행료2조등절면관장복합지기화3조계제형변절면관장복합지기승재성상적실내대비례모형대비시험。시험결과표명:재상동하재작용하,계제형변절면관장급기복합지기적침강명현저우등절면관장급기복합지기적침강。재관장재료용량급소처적지질조건상동적정황하,계제형변절면관장단장강도명현대우등절면관장적단장강도。계제형변절면관장장신강도능교호지여장신축력변화규률협조。인차,채용계제형변절면관장능충분이용장신강도,강저장기조개。
To study the ladder-shaped variable section pipe-pile composite foundation load-bearing characteristics, conducted on indoor large scale model contrast experiments the bearing properties of two groups of uniform section pipe pile composite foundation and three groups of ladder-shaped variable cross-section pipe pile composite foundation. The conclusions show that: under the same loading, the settlement of ladder-shaped variable cross-section pipe pile and its composite foundation is obviously less than that of uniform section pipe pile. On the condition that the amount of pipe pile materials and geological conditions are the same, the single pile stiffness of ladder-shaped variable cross-section is signifi-cantly greater than the stiffness of uniform section single pile. The strength of ladder-shaped variable cross-section pipe pile is coordinated with the variation of axial force of pile shaft. Therefore, adopting ladder-shaped variable cross-section pipe pile makes full use of pile strength and reduces the cost of the pile.