商合杭铁路芜湖长江大桥主桥3号墩水下基坑爆破施工技术  

Underwater Blasting Construction Techniques for No.3 Pier Foundation Pit of Main Bridge of Wuhu Changjiang River Bridge of Shangqiu-Hefei-Hangzhou Railway

作　　者：高朋飞[1] 傅菊根[1] 孔洋[2] 白荣华 GAO Peng-fei;FU Ju-gen;KONG Yang;BAI Rong-hua(School of Civil and Architecture Engineering, Anhui University of Science and Technology, Huainan 232001, China;Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China;Anhui Geological Blasting Engineering Company, Hefei 230001, China)

机构地区：[1]安徽理工大学土木建筑学院,淮南232001 [2]河海大学岩土工程科学研究所,南京210098 [3]安徽地质爆破工程公司,合肥230001

出　　处：《爆破》2018年第2期125-130,共6页Blasting

基　　金：中央高校基本科研业务费专项资金资助项目(2016B43414);国家自然科学基金资助项目(51379065)

摘　　要：针对商合杭铁路芜湖长江大桥水下基坑爆破施工中爆破区域地质条件多变、航道情况复杂、流域水位高、水流急等众多施工技术难题,通过现场实验和专家评估,决定采用水下深孔微差爆破技术。运用钢管排架方案下放套管,基坑底面标高需超深0.4 m,爆区内炮孔采用梅花形布设,纵横向间排距均为2.0 m;炮孔使用水胶炸药装药,设计炸药单耗2.0~2.1 kg/m3,单孔药量48~88 kg,并对装药结构进行抗压处理;并通过六缆定位法,实现钻爆船、清渣船与运渣船协同作业。For the construction technology problems of Wuhu Yangtze river bridge of the Shangqiu-Hefei-Hang- zhou railway, there are some complex conditions including engineering geology and channel, high water level and ur- gent flow. Through the field experiment and expert evaluation, underwater deep hole millisecond blasting technology was adopted. The casing was down-transferred by the steel pipe bent frame plan. The bottom of the pit height was designed to be over-deep 0. 4 m, blasting area with plum blossom-shaped layout, vertical and horizontal spacing 2.0 m. Water glue explosive was designed with consumption 2.0 - 2.1 kg/m^3, single hole explosive amount of 48 -88 kg and the charge structure subjected to compression treatment. The co-operation of the blasting ship, the slag cleaning vessel and the slag transporting ship were realized by the six cables positioning method.

关 键 词：水下基坑爆破 船舶定位 爆破参数 钻爆工艺 

分 类 号：U445[建筑科学—桥梁与隧道工程] X932[交通运输工程—道路与铁道工程]