【作者】 彭柏兴； 王星华；

【Author】 PENG Baixing~(1,2),WANG Xinghua~1 (1.School of Civil Engineering and Architecture,Central South University,Changsha,Hunan 410075,China; 2.Changsha Municipal Institute of Investigation and Design,Changsha,Hunan 410007,China)

【机构】 中南大学土木建筑学院； 长沙市勘测设计研究院；

【摘要】 湘浏盆地内广泛分布着内陆湖相沉积的白垩系至第三系红层软岩,具有成岩差、易风化崩解等特性,其嵌岩桩的工作性状与《建筑桩基技术规范》(JGJ 94-2008)规定不尽相同。为研究红层嵌岩桩的承载性状,进行了红层嵌岩桩的原型试验。桩基试验结果表明,嵌岩桩的荷载传递方式与端承摩擦桩相似,Q-s曲线呈缓变型。以原型桩试验结果为基础,运用有限单元法对桩径、桩身模量、桩端持力层及嵌岩深度对桩基承载性状的影响进行了模拟分析,其结果可用于指导工程实践和理论研究。更多还原

【Abstract】 Red bed is widespread during Cretaceous to Eogene in Xiang-Liou Basin,which is a kind of soft rock with the features of weak diagenetic process and susceptiable to weathering and easily be disingtegrated.The practical working chracters of rock-socketed pile in red layer is different from the《Technical Code for Building Pile Foundations》(JGJ 94-2008).The prototype pile test is conducted to study the bearing capacity behavior in red bed.The test result show that the load transferring performance of rock-socketed pile is similar to that of end-bearing friction pile and the Q-s carves are varying slowly.Based on the static load test results,the influence factors of the ultimate capacity of rock-socketed pile in red bed such as the diameter of pile,the modulus of pile, the property of soils in base,the length of rock-socketed are simulated by using finite element method.The results of analysis can be used in the engineering and theoretical research.更多还原