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爆破拆除法有哪几种?
[ 2011-8-1 14:40:00 | By: 杨远锋 ]
 
爆破拆除用于较坚固的建筑物和构筑物以及高层建筑物或构筑物的拆除。其基本方法有三种:控制爆破、静态爆破、近人爆破。
(1)控制爆破:通过合理的设计和精心的施工,严格控制爆破能量和规范,使爆破声响、飞石、振动、冲击波、破坏区域以及破碎体的散坍范围和方向,控制在规定的限度内。这种爆破方法不需要复杂的专用设备,也不受环境限制,能在爆破禁区内爆破。用于拆除房屋、构筑物、基础、桥梁,具有施工安全、迅速、不受破坏等优点。
(2)静态爆破:将一种含有铝、镁、钙、铁、氧、硅、磷、钛等元素的无机盐粉末状破碎剂水化,产生巨大膨胀压力(可达30MPa~50MPa),将混凝土或岩石胀裂、破碎,这种爆破的特点是:
(1)破碎剂非易燃、易爆危险品,运输、保管、使用安全。
(2)爆破无震动、声响、烟尘、巨石等公害。
(3)操作简单、不需要堵炮机,不用雷管,不点炮等操作,不需要专业工种。
(4)经过适当设计,可进行定向破碎,可用于某些不宜使用炸药爆破的特殊场合,对大体积脆性材料的破碎及切割效果良好。适用于混凝土、钢筋混凝土和砖石构筑物、结构物的破碎拆除及各种岩石的破碎或切割,或作二次破碎,但不适用于多孔体和高耸结构。本办法存在一些问题:能量不如炸药爆破大;钻孔较多;效果受气温影响大;开裂时间不易控制及成本稍高等。
(3)近火爆破:又称高能燃烧剂爆破。采用金属氧化物(CuO、MnO2)和金属还原剂(铝粉)按一定比例组成混合物,将其装入炮孔内,用电阻丝引燃,发生氧化还原反应,能产生2192士280℃的高温膨胀气体,而将混凝土破坏。但当出现胀裂、遇空气后压力急骤下降,可使混凝土不致飞散,达到切割破坏的目的。这种爆破具有以下持点:
(1)爆破音响较小,震动轻微,飞石、烟尘少,安全范围可至3m内不伤人。
(2)成分稳定,不易燃烧,能短时间防潮防水,能用于760℃以下高温,加工制作简单,不用雷管起爆,炮孔堵装作业安全,瞎炮易于处理:保存、运输及使用安全可靠。
(3)切割面比较整齐,保留部分不受损坏。
(4)采用粗铝粉(40目~160目)和工业副产品的氧化剂配制,价格低于岩石炸药。这种爆破方法适用于一般混凝土基础、柱、梁、板等的拆除及石料的开采。不宜用于不密实结构及存在空隙的结构。
 
 
 
原创
[ 2016-9-6 17:08:25 | By: 原创(游客) ]
 
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原创
[ 2016-9-28 16:43:55 | By: 原创(游客) ]
 
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原创
[ 2016-9-30 11:20:16 | By: 原创(游客) ]
 
原创(游客)http://rywkdks.lofter.com/post/1e698063_c7f9f81 http://rywkdks.lofter.com/post/1e698063_c7f7ae9 http://rywywj.lofter.com/post/1e6a80c3_c8239a3 http://rywywj.lofter.com/post/1e6a80c3_c802946 http://rywywj.lofter.com/post/1e6a80c3_c821013 http://rywkdks.lofter.com/post/1e698063_c7f45f5 http://rywydx.lofter.com/post/1e6a68e3_c81123b http://rywywj.lofter.com/post/1e6a80c3_c820f69 http://rywydx.lofter.com/post/1e6a68e3_c8153d6 http://njryw168.lofter.com/post/1e6983e5_c7f090f
 
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Re:在漫画中识别身边的违章
[ 2016-10-13 15:35:50 | By: aptwa(游客) ]
 
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Re:在漫画中识别身边的违章
[ 2016-10-16 16:39:33 | By: tsiko(游客) ]
 
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Re:在漫画中识别身边的违章
[ 2016-10-21 3:38:42 | By: rhjnq(游客) ]
 
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Re:在漫画中识别身边的违章
[ 2016-10-21 12:53:46 | By: xvnps(游客) ]
 
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Re:在漫画中识别身边的违章
[ 2016-10-23 14:48:47 | By: utjlp(游客) ]
 
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Re:在漫画中识别身边的违章
[ 2017-2-18 18:45:08 | By: cfior(游客) ]
 
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Re:在漫画中识别身边的违章
[ 2017-3-4 14:34:08 | By: ejoqu(游客) ]
 
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