中国港湾建设
中國港灣建設
중국항만건설
CHINA HARBOUR ENGINEERING
2015年
9期
1-5
,共5页
冯志焱%任子熊%齐晋阳%马小兵
馮誌焱%任子熊%齊晉暘%馬小兵
풍지염%임자웅%제진양%마소병
静压桩%时效%数值分析%中性点%承载力
靜壓樁%時效%數值分析%中性點%承載力
정압장%시효%수치분석%중성점%승재력
static pressed pile%time effect%numerical analysis%neutral point%bearing capacity
孔隙水压力的消散对桩基的承载变形性状有着重要的影响。文中分析了在孔隙水压力消散过程中,桩身负摩阻力、中性点、桩端阻力、桩侧阻力、桩身轴力以及桩极限承载能力的变化规律。结果表明:孔隙水压力由桩顶至桩底消散的越来越慢,且消散速率前期较后期快;桩的承载力呈双曲线增长,前期承载力增幅较大,承载力的提高主要依靠侧摩阻力的提高;中性点的位置逐步下移,侧摩阻力沿桩身大致呈S形分布;桩周土体会产生固结沉降,强度也得到提高,将对桩的承载力产生不同的影响。
孔隙水壓力的消散對樁基的承載變形性狀有著重要的影響。文中分析瞭在孔隙水壓力消散過程中,樁身負摩阻力、中性點、樁耑阻力、樁側阻力、樁身軸力以及樁極限承載能力的變化規律。結果錶明:孔隙水壓力由樁頂至樁底消散的越來越慢,且消散速率前期較後期快;樁的承載力呈雙麯線增長,前期承載力增幅較大,承載力的提高主要依靠側摩阻力的提高;中性點的位置逐步下移,側摩阻力沿樁身大緻呈S形分佈;樁週土體會產生固結沉降,彊度也得到提高,將對樁的承載力產生不同的影響。
공극수압력적소산대장기적승재변형성상유착중요적영향。문중분석료재공극수압력소산과정중,장신부마조력、중성점、장단조력、장측조력、장신축력이급장겁한승재능력적변화규률。결과표명:공극수압력유장정지장저소산적월래월만,차소산속솔전기교후기쾌;장적승재력정쌍곡선증장,전기승재력증폭교대,승재력적제고주요의고측마조력적제고;중성점적위치축보하이,측마조력연장신대치정S형분포;장주토체회산생고결침강,강도야득도제고,장대장적승재력산생불동적영향。
The dissipation of pore water pressure has an important impact on the pile bearing and deformation characteristics. We analyzed the pore water pressure during the dissipation, which has an effect on negative skin friction, neutral point, pile tip resistance, pile skin resistance, axial force as well as ultimate bearing capacity. The results show that:in the dissipation of pore water pressure, the pore water pressure dissipates more and more slowly from top pile to bottom, and the earlier pore water pressure dissipates faster than latter one;the bearing capacity of the pile is a hyperbolic growth, early, the larger increase in bearing capacity, the bearing capacity growth mainly depends on the growth of side resistance; the position of neutral point shifts down gradually, and the distribution of side friction shows S type;the soil around the pile will produce the consolidation settlement and its strength is also improved, these aspects will have different effect on the bearing capacity of the pile.