复杂环境下分离式立交桥爆破拆除技术
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摘要
为实现桥体充分解体,在保证桥梁整体结构稳定的前提下,在箱梁顶部开了12个切割槽,极大方便了箱梁下部装药,同时采用孔外延时排间微差爆破技术,桥下预先铺设防护沙袋,有效的降低了塌落体的触地振动,取得了理想的爆破效果。
In order to make the bridge disintegrate completely,and ensure the stability of the overall structure of the bridge. In this premise,12 cutting grooves were opened at the top of the box girder,it greatly facilitates the loading of the lower part of the box girder. At the same time,the use of inter hole delay,inter row millisecond blasting technology,laying sandbags under the bridge,effectively reduce the ground motion of falling bodies. The ideal blasting effect has been obtained.
In order to make the bridge disintegrate completely,and ensure the stability of the overall structure of the bridge. In this premise,12 cutting grooves were opened at the top of the box girder,it greatly facilitates the loading of the lower part of the box girder. At the same time,the use of inter hole delay,inter row millisecond blasting technology,laying sandbags under the bridge,effectively reduce the ground motion of falling bodies. The ideal blasting effect has been obtained.
引文
[1]汪旭光,于亚伦.拆除爆破理论与工程实例[M].北京:人民交通出版社,2008.
[2]汪旭光.中国典型爆破工程与技术[M].北京:冶金工业出版社,2006.
[3]王浩州,严东晋,年鑫哲,等.高架桥爆破拆除塌落震动的测试与分析[J].爆破,2014,31(1):144-149.
[4]徐鹏飞,盖四海,张英才.运行中的高速公路跨线桥梁的拆除爆破[J].工程爆破,2014,20(3):16-19.
[5]GB 6722—2014,爆破安全规程[S].
[6]王文辉,赵根.大型城市高架桥爆破拆除振动特性[J].工程爆破,2014,20(5):41-45.
[2]汪旭光.中国典型爆破工程与技术[M].北京:冶金工业出版社,2006.
[3]王浩州,严东晋,年鑫哲,等.高架桥爆破拆除塌落震动的测试与分析[J].爆破,2014,31(1):144-149.
[4]徐鹏飞,盖四海,张英才.运行中的高速公路跨线桥梁的拆除爆破[J].工程爆破,2014,20(3):16-19.
[5]GB 6722—2014,爆破安全规程[S].
[6]王文辉,赵根.大型城市高架桥爆破拆除振动特性[J].工程爆破,2014,20(5):41-45.