摘要
嘉绍通道长山河特大桥位于嘉兴海宁市扬汇桥村,桥长1061 m。桩径1.8 m,桩长92 m,属于超长钻孔灌注桩。为了测定桩身的抗压极限承载力,对试桩采用自平衡测试法进行了静载试验。基于实测数据,对桩总承载力、桩侧摩阻力、桩端承载力、桩身变形、位移以及承载性能进行了分析,并将桩端承载力实测值和公路桥涵地基基础规范计算值进行了对比。研究表明桩侧摩阻力提供了大部分的承载力;施工工艺对超长桩承载力有很大影响;控制沉降同时也要控制桩身压缩变形。成功地确定了超长钻孔灌注桩的单桩极限承载力以及承载力性能,位移特征,可为类似工程参考。
The JiaShao TongDao ChangShan River Bridge is loaded in YangHuiqiao Village HaiNing JiaXing City, which is 1061m long. The piles of the king tower foundation reaches 1.8 m in diameter and 92 m in pile length which belong to the super long bored piles. The program consists of self-balanced load test on a pile in static loading test for getting ultimate bearing capacity. Basing on the test results, the total hearing capacity of the piles, the side friction, the tip resistance, settlement, deformation of pile and the load carrying properties of the pile was analyzed. It presents that pile shaft resistance capacity provide s the most capacity, the construction technologies influence the bearing capacity of the super long piles, controlling settlement is as important as controlling the deformation of pile. This program successfully established single ultimate bearing capacity of super long bored pile and load carrying properties, verified Displacement characteristics, which can be referenced by similar project.
出处
《科技通报》
北大核心
2012年第9期147-150,154,共5页
Bulletin of Science and Technology
基金
国家自然科学基金资助项目(50908048)
江苏省自然科学基金项目(BK2008315)
关键词
超长桩
自平衡测试法
摩阻力
端阻力
super-long drilled pile
self-balanced load test
side friction
tip resistance
