岩土力学
巖土力學
암토역학
ROCK AND SOIL MECHANICS
2013年
3期
849-855
,共7页
纠永志%黄茂松%木林隆%连柯楠
糾永誌%黃茂鬆%木林隆%連柯楠
규영지%황무송%목림륭%련가남
层状地基%桩筏基础%多向荷载%相互作用
層狀地基%樁筏基礎%多嚮荷載%相互作用
층상지기%장벌기출%다향하재%상호작용
layered soil%piled raft foundation%coupled loads%interaction
提出一种多向荷载作用下层状地基中刚性桩筏基础的计算方法.基于剪切位移法,采用传递矩阵形式分析了竖向荷载下桩顶面-桩顶面相互作用;引入修正桩侧地基模量,采用有限差分法分析了水平荷载下桩顶面-桩顶面相互作用;基于层状弹性半空间理论,分析了多向荷载下桩顶面-土表面、土表面-桩顶面、土表面-土表面的相互作用关系.建立了桩土体系柔度矩阵,得到了多向荷载下层状地基中刚性桩筏基础的受力和变形的关系以及桩的内力和变形沿桩身分布规律.通过与有限元对比,验证了该方法的合理性和修正地基模量的优越性,并对多向荷载作用下的桩筏基础进行了计算分析,计算结果表明,水平力将会引起桩筏基础的倾斜.
提齣一種多嚮荷載作用下層狀地基中剛性樁筏基礎的計算方法.基于剪切位移法,採用傳遞矩陣形式分析瞭豎嚮荷載下樁頂麵-樁頂麵相互作用;引入脩正樁側地基模量,採用有限差分法分析瞭水平荷載下樁頂麵-樁頂麵相互作用;基于層狀彈性半空間理論,分析瞭多嚮荷載下樁頂麵-土錶麵、土錶麵-樁頂麵、土錶麵-土錶麵的相互作用關繫.建立瞭樁土體繫柔度矩陣,得到瞭多嚮荷載下層狀地基中剛性樁筏基礎的受力和變形的關繫以及樁的內力和變形沿樁身分佈規律.通過與有限元對比,驗證瞭該方法的閤理性和脩正地基模量的優越性,併對多嚮荷載作用下的樁筏基礎進行瞭計算分析,計算結果錶明,水平力將會引起樁筏基礎的傾斜.
제출일충다향하재작용하층상지기중강성장벌기출적계산방법.기우전절위이법,채용전체구진형식분석료수향하재하장정면-장정면상호작용;인입수정장측지기모량,채용유한차분법분석료수평하재하장정면-장정면상호작용;기우층상탄성반공간이론,분석료다향하재하장정면-토표면、토표면-장정면、토표면-토표면적상호작용관계.건립료장토체계유도구진,득도료다향하재하층상지기중강성장벌기출적수력화변형적관계이급장적내력화변형연장신분포규률.통과여유한원대비,험증료해방법적합이성화수정지기모량적우월성,병대다향하재작용하적장벌기출진행료계산분석,계산결과표명,수평력장회인기장벌기출적경사.
A simplified analytical approach is proposed to study the behavior of piled raft foundation with rigid raft subjected to coupled loads in layered soils. Based on the shear displacement method, using the transfer matrix, the pile-pile interaction under vertical load is analyzed. Adopting the modified subgrade modulus, the pile head-pile head interaction under horizontal load is analyzed through the finite difference method. Based on solutions for stress and displacement in layered elastic half space, the interactions between pile head and soil surface, soil surface and pile head, soil surface and soil surface subjected to coupled loads are taken into account to determine the flexibility matrix of the pile group-soil system. Then the load-settlement relationship of rigid piled raft foundations subjected to coupled loads, load and settlement of the piles along the depth are obtained. Comparison between the finite element results and the calculated results is carried out; and the feasibility of the present method for analyzing piled raft foundation and the superiority of the modified subgrade modulus are proved. The piled raft foundation with rigid raft subjected to coupled loads is analyzed. The calculating results indicate that the horizontal load will cause the pile raft foundation oblique.