人工挖孔灌注桩加固膨胀土边坡效果研究

人工挖孔灌注桩是一种治理滑坡的常用手段.在镇江黄山膨胀土滑坡治理中,设计采用了人工挖孔灌注桩,并进行了位移、土压力等多项现场测试.本文通过现场监测结果分析,得出结论:人工挖孔灌注桩加固膨胀土边坡后,抗滑桩限制了桩后侧土体位移,承担了桩后侧上部土体部分土压力,从而使桩前侧土体的土压力和位移量减小,进而增大了膨胀土边坡的稳定性.文章最后通过数值分析,证实了抗滑桩通过限制滑动面的范围,提高了边坡安全系数.这说明抗滑桩加固膨胀土边坡是有效的,对同类工程具有一定的借鉴与指导作用.

Study on Stabilizing Effect to Expansive Soil Slope by Manual Bored Concrete Piles

Manual bored concrete pile acting as anti - slide pile is a conventional measure in landslide correction. Many field tests such as displacement, earth pressure, etc were carried in Huangshan expansive soil slope stabilized by manual bored concrete piles in Zhen - Jiang of Jiangsu province of China. It is resulted from the field tests that behind the piles the upper soil displacement is restricted and the upper earth pressure is borne partially by the anti - slide piles, and before the piles the soil displacement and earth pressure is also descended. At last, the calculation results of Geo - Slope also prove that manual bored concrete piles in expansive soil slope is a successful experiment. Therefore, it provides reference and guidance to similar engineering.