鲤鱼沱大桥桩基水平静荷载试验  

HORIZONTAL STATIC LOADING TEST FOR PILE AND PILE WITH CAP OF LIYUTUO BRIDGE

作　　者：黄显彬[1,2] 王朝令[1,2] 侯松[1,2] 蒲鸿[1] 

机构地区：[1]四川农业大学土木工程学院,四川都江堰611830 [2]村镇建设防灾减灾四川省高等学校工程研究中心,四川都江堰611830

出　　处：《工业建筑》2015年第11期116-121,共6页Industrial Construction

基　　金：村镇建设防灾减灾四川省高等学校工程研究中心资助项目(CDPMV1403);国家自然科学基金青年科学基金项目(5140081608)

摘　　要：都江堰市鲤鱼沱大桥处地震高烈度地区,设计因地震等因素对桩基水平承载力要求较高。选取非工程桩S1和S2进行水平荷载试验,由千斤顶施加水平力、S1和S2相互提供水平反力。试验表明:S1水平临界荷载为880 k N、S2水平临界荷载为1 100 k N,S1水平极限承载力为1 540 k N、S2水平极限承载力为1 760 k N。施作工程桩3c2和3c4的1号承台,施作S1和S2的2号承台,选取然后对带桩承台进行水平荷载试验,由千斤顶施加水平力、1号承台桩和2号承台桩相互提供水平反力。试验表明:1号承台水平临界荷载为3 200 k N,水平极限承载力为5 200 k N。施作承台后,折算成S1水平临界荷载提高720 k N、提高幅度81.82%;折算成S1水平极限承载力提高1 060 k N、提高幅度68.83%。The Liyutuo Bridge in Dujiangyan City is located in the high seismic intensity regions,so higher demands on the horizontal bearing capacity of pile foundation are required due to the seismic factors and other reasons. An experiment was carried out to verify the single pile horizontal bearing capacity of pile foundation by selecting nonengineering piles S1 and S2 to test the horizontal load. In the experiment,horizontal force was applied to the two nonengineering piles by jack and the horizontal reaction was provided with each other. The test showed that the horizontal critical load of S1 and S2 was 880 k N and 1 100 k N,and the horizontal ultimate capacity of them was 1 540 k N and1 760 k N. In another experiment,cap No. 1 of engineering piles 3c2 and 3c4 and cap No. 2 of non-engineering piles S1 and S2 were made. The cap No. 1 and No. 2 were selected for a horizontal loading test to verify the horizontal bearing capacity of pile caps,in which horizontal force was applied to the two caps by the jack and the horizontal reaction was provided with each other. The test showed that the horizontal critical load of cap No. 1 was 3 200 k N,and its horizontal ultimate capacity was 5 200 k N. After making the cap,the horizontal critical load of S1 was calculated to increase by 720 k N,which was increased to 181. 82%. And the horizontal ultimate load of S1 was calculated to increase by 1 060 k N,which was increased to 168. 83%.

关 键 词：非工程桩 工程桩 后注浆 承台 水平荷载试验 

分 类 号：U443.15[建筑科学—桥梁与隧道工程] U441.2[交通运输工程—道路与铁道工程]