【作者】 梁笃堂；

【导师】 黄质宏；

【作者基本信息】 贵州大学 ， 岩土工程， 2007， 硕士

【摘要】 本文对所收集大量贵州地区泥岩、泥质白云岩等软质岩石资料进行统计分析，并结合软岩室内抗压、抗剪强度试验、软岩地基的现场静载荷试验和软质岩石地基嵌岩桩静载荷试验，对贵州地区泥岩、泥质白云岩的物理、力学性质、环境效应、软岩地基的承载力的确定方法、软质岩石嵌岩桩荷载的承载性状等进行了较为系统的研究，并得出以下结论：1、软岩在饱水后的抗压、抗拉、抗剪强度迅速降低，随饱水时间的延长，软岩的抗压、抗拉、抗剪强度下降的幅度越大；2、在确定软岩地基承载力时对建筑场区进行岩土工程勘察、充分考虑影响岩基承载力的各种因素，特别要注意环境因素对软质岩石的风化作用，而不能仅凭经验或单一的某项试验确定，做到具体问题具体分析：3、目前针对贵州地区软质岩石地基承载力特征值宜由现场载荷试验或其它原位测试、理论公式计算、并结合地区工程经验等方法综合确定；4、分析泥岩嵌岩灌注桩静载荷试验成果，其承载性状主要表现为：①软质岩石嵌岩桩的单桩承载力由桩周土摩阻力、嵌岩段侧阻力和嵌岩端阻力构成；②软质岩石嵌岩桩桩侧的摩阻力在各级荷载作用下由小到大缓慢上升，然后桩端阻力才逐渐发挥，直至达到极限值；③软质岩石嵌岩桩的单桩承载力与嵌岩深度有关。更多还原

【Abstract】 Large amount of Guizhou area mudstone , mud dolomite the main body of a book was collected ,and soft the quality rock data is carried out statistic analysis, and unioned soft rock interior resist compression , shear intensity experiment, soft rock foundation scene loads the quality rock foundation testing that the sum is soft quietly embedding the quiet rock pole loading experiment, the physical mechanics character, environment effect to the Guizhou area mudstone , the mud dolomite, are soft rock foundation’s ascertaining that bearing the weight of a force method, is soft question a rock embedding rock pole load’s bearing the weight of properties waiting to have carried out comparatively systematic research , and reach the following conclusion: 1、Soft the rock resists compression, tensile , shear strength prompt lessening in satisfying the water queen’s, the extension following full water time, is soft rock’s the extent resisting compression , tensile , the shear strength coming down is increasingly large; 2、For suring soft the project shoud carry out rock soil on the area building field surveys , consider sufficiently the factor affecting batholite bearing the weight of the force various when rock foundation bears the weight of a force. The efflorescence should be face to face soft especially paying attention to an environmental factor questioning a rock acts on, unable only let experience or some single items test that achieving for sure, concrete problem analyses concretely;3、Area is at present soft specifically for Guizhou quality rock foundation bears the weight of the force characteristic value ought to test from the scene loading experiment or other original place , theoretical formula method such as secretly scheming against, and being tied in wedlock area project experience ascertains that synthetically;4、Analyse a mudstone embedding a rock pouring quiet loading of pole testing that achievement, the person bear the weight of properties main behaviour is:(1) Soft the quality rock embeds the rock pole Shan pole bearing the weight of a force rubbing resistance from pole cycle soil , embeds rock Duan oblique tones resistance and embeds a rock holding resistance formation; (2) Soft question a rock embedding rock poles side’s rubbing resistance rise under all of the various levels load effect from arriving at for a short time greatly slowly, the pole holds resistance then bring into play just now gradually, until reaching limit value; (3) Soft the quality rock embeds the rock pole shan pole bearing the weight of a force being connected with to embedding the rock depth.更多还原