饱和软土地基中群桩施工引起的超孔隙水压力

通过对挤土桩桩基施工过程中实测资料的分析和理论研究,认为群桩施工时的超孔隙水压力与单桩情况下的不同.虽然群桩的影响因素更为复杂,但在各桩施工时的相互影响和“水裂”作用的限制下,孔隙水压力值仍会趋于稳定.为此对饱和软土中桩群范围内超孔隙水压力的产生、分布和变化趋势进行了探讨,对桩群外超孔隙水压力的分布规律和影响范围也进行了讨论.

Excess Pore Water Pressure Caused by Installing Pile Group in Saturated Soft Soil

By theoretical analyses and practical measurement during the construction of displacement pile foundation, we have deemed that excess pore water pressure in the installing pile group is different from that around a pile. Although influence factors in pile group are more complicated than around a pile, yet excess pore water pressure in pile group tends to steady owing to the limitation of influence of installing piles each other and water split action. We have studied the formation,distribution and variance tendence of excess pore water pressure in pile group in saturated soft soil. Its distribution and range of influence radius out pile groups are discussed, too.