小断面桩孔内超深孔爆破破碎孤石的实践  

PRACTICE OF BREAKING A LONE ROCK IN SMALL CROSS-SECTION PILE-WELL BY SUPER-DEEP HOLE BLASTING

作　　者：王鹤鸣 崔年生 耿德川 黄成造 

机构地区：[1]广州爆破工程有限责任公司,广州510030 [2]广州市公路局,广州510050

出　　处：《工程爆破》2002年第3期53-55,共3页Engineering Blasting

摘　　要：在断面积仅为 1 13m2 的桩孔内成功地进行深孔爆破施工 ,一次爆破将桩孔 -16m至 -2 4 5m标高范围内的岩石炸碎 ,使冲孔机能继续正常冲孔。本文主要介绍了爆破参数选择、炮孔布置设计、分段装药结构、装药量的确定以及施工方法。同时 ,提出了工程中存在的一些技术问题。In a pile well with a sectional area of 1 13 square meters,deep hole blasting was successfully carried out The rock located in the elevation of from -16 0m to -24 5m in the pile well was broken by once blast,making the impacting machine normally work In this paper,the selection of blasting parameters,the design of blasthole pattern,the decked charging structure and determination of charging weight and blasting implementation were mainly introduced At the same time,some technical problems existed in the project were put forward

关 键 词：冲孔桩 深孔爆破 爆破破岩 公路桥 施工 小断面桩 

分 类 号：U445.551[建筑科学—桥梁与隧道工程] U445.53[交通运输工程—道路与铁道工程]