【作者】 陈晨； 冯雪威； 李冬霜； 纪晓宇； 严轩辰；

【Author】 Chen Chen;Feng Xuewei;Li Dongshuang;Ji Xiaoyu;Yan Xuanchen;College of Construction Engineering,Jilin University/State Key Laboratory of Superhard Materials/Laboratory of Technology for Drilling Under Complex Condition of Ministry of Land and Resources;

【机构】 吉林大学建设工程学院/超硬材料国家重点实验室/国土资源部复杂条件钻进技术开放研究实验室；

【摘要】 本文介绍了一种新型扩孔技术——高压脉冲放电技术。该技术是在充满液相介质的已有钻孔中放人电极,通入高压电,形成液电效应,电能转变为机械波能,对周围液体介质的径向(垂直于放电方向)施加冲击波,传递给地层,挤密周围土体实现扩孔。试验使用从俄罗斯引进的高压脉冲放电装置,完成了2个钻孔的扩孔工作。使用相同电容值,在不同的电压下分别在每个孔的1.5m和2m处进行放电,测得不同放电次数下的钻孔直径由150mm扩大至340mm~404mm,表明高压脉冲放电扩孔技术可以快速地进行挤密扩大孔径,并通过试验和理论计算得到了放电能量和放电次数对扩孔效果的影响。与传统的扩孔技术相比,该技术施工速度快、操作简单、可控性好,是一项应用前景广阔的环保型新技术。更多还原

【Abstract】 A new reaming technology—pulsed high-voltage discharge technology is introduced in this paper,which forms liquid-electric effect making electric energy into mechanical wave by connecting high-voltage after putting electrode in the borehole filled with liquid medium.Impulse wave exerted on liquid medium around the electrode radially(perpendicular to direction of discharge) is passed to stratum to compact the soil.Device of pulsed high-voltage discharge introduced from Russia was used to do this experiment,which completed reaming work for two boreholes.Using the same capacitance value,discharge was conducted at 1.5m and 2m in each borehole separately under the condition of different voltages.Boreholes’ diameter were enlarged from 150 mm to 302 mm ~ 319 mm with different discharge times.It indicated that pulsed high-voltage discharge technology could compact and enlarge the diameter rapidly.And,the reaming effect of different discharge energy and times have been found through experiment and theoretical calculations.Compared with traditional reaming technology,this technology has the characters of quick construction and simple operation,and can enlarge the diameter of optional position in borehole.It’s a new environmentally friendly technology with wide application prospect更多还原