摘要
对于大截面钢筋混凝土抗滑桩,视为埋置于坚硬地层中的弹性地基梁。通过对重庆市奉溪高速公路孙家崖隧道滑坡治理实际工程的抗滑桩加固监测成果进行分析,通过在桩身上方距顶端2 m处设置Ф110 mm的钻孔测斜管,监测抗滑桩在施工过程中所造成滑坡的水平位移,根据孔深与水平位移确定的曲线图判断滑动面所在的位置;同时,通过在桩身护壁中埋置的混凝土应力计、钢筋应力计和桩后土体中埋置的土压力盒,监测桩身在开挖过程中护壁所受的混凝土应力、钢筋轴力和土压力,从而通过各自的变化曲线为抗滑桩施工提供安全保障。
Reinforced concrete friction pile of large cross section,it is usually treated as an elastic foundation beam embedded in hard ground. The monitoring results of the reinforced friction pile in landslide treatment engineering in Sun Jia Ya tunnel on Feng Xi highway of Chong Qing city are analyzed in this paper; drillling inclinometer of the diameter of 110 mm is fixed at 2 m from the top of the pile body,horizontal displacement of the landslide during the construction of the friction pile is monitored,then the position of the sliding surface is decided according to the curve determined by the hole depth and horizontal displacement. At the same time,through the concrete stress meter and steel stress meter embedded in the pile wall and the soil pressure cell buried in the soil behind the pile,the stress of concrete,steel axis force and soil pressure of the pile wall are monitored during the excavation process of the pile body,so as to provide safety for the friction pile construction through the respective changing curves.
出处
《南阳理工学院学报》
2014年第3期98-101,共4页
Journal of Nanyang Institute of Technology
关键词
抗滑桩
滑动面
测斜孔
监测
friction pile
sliding surface
clinometer hole
monitoring
