摘要
以江阴大桥南塔墩桩基础方案为例,介绍一种适用于高边坡上高、重、大建筑物的基础方案。64个测点的70次桩基轴力实测资料表明:该基础方案能确保将1.2×106 kN的垂向荷载传递至地表以下26 m的地基岩体深 处,使塔基边坡浅层岩体不受工程荷载影响。桩基轴力实测资料还表明:塔墩下的桩基存在超载现象,平均可达35%。此外,桩基嵌岩后其承担的荷载很快向桩周岩体中扩散,嵌岩面以下7 m处的桩基轴力已衰减了75%。
Taking the south tower piling-foundation scheme of Jiangyin Bridge as an example,a foundation scheme applied to high,heavy and large building in high slope is introduced. The 70 times of measured data for axial force of pile at 64 points show that this foundation scheme can ensure the vertical load of 1.2×106 kN transferred to foundation rockmass of 26 m under ground. Then, the stability of the shallow rock mass will not be influenced by the engineering load. The measured data still state that the pile of the tower is overloaded, and the overload is up to 35 percent. In addition,7 m below the surface of embedded-rock,the axial force of pile reduces 75 percent because the load taken by embedded-rock foundation dissipates fast to the surrounding rockmass.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2002年第6期883-887,共5页
Chinese Journal of Rock Mechanics and Engineering
关键词
江阴大桥
边坡
嵌岩桩
摩擦失效机理
桩基轴力
钢筋应力计
Key wods Jiangyin bridge,slope,embedded-rock piling,friction-lost treatment,axial force of pile,stress detector
