【作者】 汪洋；

【导师】 张彬；

【作者基本信息】 中国地质大学(北京) ， 地质工程， 2016， 硕士

【摘要】 岩土工程勘察是建筑基础设施设计和施工的基础。然而,在伊拉克开展岩土工程勘察往往面临当地勘察单位试验技术水平落后且工作效率低,依据的规范多是西方国家制定的规范,与我国规范体系存在较大差异。因此,对比研究中外地基承载力的概念、理论和计算方法,得到基于国内标准和国外标准的地基承载力计算公式是十分重要的,具有实用和推广价值。本文基于中外地基承载力理论体系,对比国内《建筑地基基础设计规范》(GB50007-2011)和美国材料与试验协会(American Society for Testing and Materials,ASTM)关于确定地基承载力取值的理论方法的异同。对伊拉克哈法亚油田浅基础承载力与岩土原位测试参数相关性进行研究,以此求出哈法亚油田地基承载力经验公式。依据美国标准(ASTM D1194)和中国标准(GB50007-2011)运用ABAQUS有限元软件建立载荷试验数值模型,对比中美载荷试验确定地基承载力取值的异同。本文的主要研究工作及成果如下:(1)研究国内外地基承载力计算理论的差异,分析不同承载力计算标准下承载力取值出现差异的原因,提出基于中外标准的承载力计算方法,建立中外标准下承载力取值之间的换算关系。(2)结合哈法亚油田载荷试验、原位测试和土工试验参数,基于数学回归理论和方法,建立哈法亚油田浅基础承载力与原位测试参数、土工试验参数的经验关系公式。(3)分析美国标准(ASTM D1194)和中国标准(GB50007-2011)关于载荷试验的差异以及对地基承载力取值的影响,在此基础上分别依据美国标准(ASTM D1194)和中国标准(GB50007)运用ABAQUS有限元软件建立载荷试验数值模型,以求得基于中国标准(GB50007)的载荷试验的地基承载力取值,并建立中美标准下载荷试验的地基承载力取值的换算关系。更多还原

【Abstract】 Geotechnical engineering investigation is the basis of designing and constructing building foundation. However, there are some problems such as low level of testing skill and efficiency of geotechnical engineering investigation in Iraq. And the standard which accorded in Iraq is design by western countries. It has a lot of difference with Chinese standards. Therefore it is necessary to compare the difference of the concepts,theory and calculate method of foundation bearing capacity between China and western countries and obtain the formulas of foundation bearing capacity basis on standard of china and western countries. It has utility and promotional value. This paper compare the difference of calculation theory of foundation bearing capacity between Chinese Code for design of building foundation(GB5007-2011) and standard of American Society for Testing and Materials(ASTM D1194). The correlation of foundation bearing capacity and parameter of geotechnical in-situ test of Iraq halfaya oilfield is studied. The foundation bearing capacity empirical formula of Iraq halfaya oilfield was been obtained. The numerical models of load test are built based on GB5007-2011 and ASTM D1194 by ABAQUS and the difference are compared. The main study job of this paper as follow:(1) The differences of the theory of foundation bearing capacity of China and western countries are studied and the reasons of the differences of two standards are analyzed. The foundation bearing capacity calculation methods of Chinese and western countries standard and the conversion relationship were presented.(2) Based on the mathematical regression theory and method, the empirical formulas of Iraq halfaya oilfield were established combine with foundation bearing capacity, geotechnical in-situ test parameter and soil test parameter.(3) The differences of load test standard between GB5007-2011 and ASTM D1194 and the influence on making sure of the foundation bearing capacity value are analyzed. The numerical models are built based on GB5007-2011 and ASTM D1194 and the values of foundation bearing capacity based on GB5007-2011 are confirmed.And the conversion relation of value of china and American standard is built..更多还原