【作者】 王治军； 何军； 李喜安； 宋焱勋； 王继华； 王锦霞； 宋继文； 马崇； 李亮； 陈文军； 贾丽娜；

【Author】 WANG Zhijun~①HE Jun~①LI Xi’an~(②⑤)SONG Yanxun~②Wang Jihua~③WANG Jinxia~④SONG Jiwen~①MA Chong~①LI Liang~②CHEN Wenjun~②JIA Lina~②(①Company limited of Chang-qing Science and Technology,Xi’an 710021)(②College of Geology Engineering and Geomatics,Chang’an University,Xi’an 710054)(③Geo-Environmental Monitoring Institute of Henan Province,Zhengzhou 450016)(④Geology Team of Exploration Bureau of Hebei Province,Handan 056001)(⑤Open Research Laboratory of Geotechnical Engineering,The Ministry of Land Resources,Xi’an 710054)

【机构】 西安长庆科技工程有限责任公司； 长安大学地质工程与测绘学院； 国土资源部岩土工程开放研究实验室； 河南省地质环境监测院； 河北省地矿局第一地质大队；

【摘要】 针对振冲砂桩复合地基,在单桩及桩间土现场极限载荷试验取得结果的基础上,借助数值模拟手段反演了载荷试验条件下单桩及桩间土破坏形式及特点,继而根据载荷试验条件下单桩及桩间土破坏形式及特点,近似确定了桩径为1m、桩间距为1.8m的砂桩复合地基极限承载力约为755kPa,该结果与采用复合地基理论计算通式当桩间土极限强度发挥系数λ取1时的结果一致,由此可见当其他条件相同时,根据目前复合地基承载力理论计算通式计算的复合地基极限承载力其结果受桩间土极限强度发挥系数的影响较为明显。更多还原

【Abstract】 In this paper,based on the results from loading tests on the single sand pile and inter-pile soil,the character of deforming and failure of single pile as well as the inter-pile soil were reproduced through numerical simulation, by which the Ultimate Bearing Capacity 755kPa of the Composite Foundation(with piles at 1.8m intervels)was obtained.This result can be also derived from the theoretical formula when the strength ratio of inter-pile is valued with 1.The author suggested that the strength ratio of inter-pile has significant influence on the calculation results of Ultimate Bearing Capacity of the Composite Foundation when other conditions keep constant.更多还原