【摘要】 基于上海地区③土层上的一座无桩基础水闸——祝家港节制闸闸室的沉降资料,分别对沉降曲线本身、用双曲线配合法对地基土的最终沉降量进行预测及地基土沉降与地基反力的关系这3个方面进行了分析。分析结果表明:上海地区③土层上无桩基水闸施工期的沉降量一般在-40 mm左右,沉降曲线在水闸通水后一般都经历一个月的"假收敛期";从用双曲线配合法推求的地基最终沉降量预测值来看,施工期③土层的瞬时沉降(弹/弹塑性变形)sd占最终沉降量的比例为25%~50%,S∞后续的大部分沉降都要在竣工后的长期使用期间内再发生;结合地基反力的测试结果来看,③土层地基反力与变形相互协调变化。更多还原

【Abstract】 On the basis of the measured displacements from the chamber of a check sluice in Zhujia Harbor,the total settlements obtained from the time-settlement curve and hyperbolic matching method were compared.The relationship between displacement and foundation resistance was analyzed.The check sluice was built directly on the 3rd stratum of Shanghai clay with no piles underneath.The results showed that:(1) the sluice settlement during construction period was about-40 mm;(2) a typical pseudo-convergence would occur on the time-settlement curve during the first month after the sluice running;(3) the settlement data predicted by the hyperbolic matching method indicated the transient(elastic/elastoplastic) settlement was about 25%-50% of the total settlement,of which the rest will appear again in a long time after construction;(4) the measured resistance in the 3rd stratum of Shanghai clay was concordant with the measured displacement.更多还原