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宜城汉江公路大桥共有直径为220cm的钻孔灌注桩66根,直径为125～150cm的钻孔灌注桩20根。用超声法检测及钻孔取芯检查后,认为有12根桩需要处理,占总桩数的14％,其中直径为220cm的11根(含断桩1根),直径为150cm的1根。针对不同性质的缺陷,采取不同的桩内补强法:一种是钻小孔、洗孔清泥、压浆;另一种是钻大孔、洗孔、下劲性钢筋、压注小石子混凝土;第三种是综合运用前两种方法。补强后用超声法复测表明:处理是基
There are 66 bored piles with diameter of 220cm and 20 bored piles with diameter of 125 ~ 150cm in Yicheng Hanjiang Road Bridge. After ultrasonic inspection and drilling coring inspection, 12 piles were considered to be processed, accounting for 14% of the total piles, of which 11 were 220 cm in diameter (including 1 broken pile) and 1 diameter was 150 cm. Different nature of the defects, to take a different method of reinforcement within the pile: one is to drill holes, wash clear mud, grouting; the other is drilling large holes, wash holes, the next reinforcement of steel, injection of pebbles Concrete; The third is the first two methods of comprehensive use. Reinforced by ultrasound retest shows that: the treatment is based