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210m??????????????

2011-03-16 17:47:05.0 ???α?????????

????  л???  ????  ?  ??  ?????

??????????????????????   210007

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?????????TD235.1       ????????A

Technical Research on Blasting Demolition of a 210m High Chimney

Wang xizhi  Xie xingbo  Tan xuegang  Tan ling  Xue fengshong

(Engineering Institute. Engineering Corps. PLA. Nanjing  210007)

Abstract??The paper presents the project of a 210m-height reinforced concrete chimney at complex circumstances was demolished by controlled blasting and focuses on key technologies, blasting parameter, safety measures and blasting effectiveness in blasting demolition of high chimney. It means the chimney blasting in domestic go beyond to a new height and provides the reference on the controlled blasting demolition on chimneys for future??

Key words: Chimney; Blasting Demolition; Directional Blasting??Vibration??Safety;

1????????

??????????????ι??λ???????о?????é????ù??????????????????С???????????????????????????????????????????е????125???????飨????1#??4#???飩?????200????????????5#??6#???飩??????????????1#??6#???鼰?????????????????????????????????????Ч?????????????о????????????????????????ù??????????????????У????????????3???????? 1#??2#????180m??3#????210m???????6????????1#??4#??90m??5#??6#??110m??1????6??????????????????????????????ú???????????????210m???3#??????????????

1.1??????

??????Y-3#?????????????????210m???????20.92m????????7.54m???????????????0.7m?????5m???????????????????????????????????5??20m????????????0.2m??20m?????????? ???5m?????и?????????0.08m??0.05m???????λ????5m?????????λ?????????????7.25m????3.5m?????????????????????????10326t??

1.2 ?????Χ??????

??????59m?????????????J-1??J-3?????????20m??7???????????J-7?????????45m??7?????л??飨J-3???????108.8m??7#??8#????????????210m???4#????Y-4#????????28m?????е??????????????J-6????????????????1-4#???????1#??2#180m??????????????г?420m????68m??????????á?210m???????Χ???????1??

?1 ?????Χ????????

???1??Y????????Y-1#??Y-2#??180m??????Y-3#??210m????Y-4#??210m???????У?

2??T???????????T-1#??T-4#??90m??????T-5#??T-6#??110m??????T-7#??T-8#??110m???????У?

3??J??????????J-1??J-2?1??6#????????????????J-3?7??8#????????????J-7??J-8???????J-5??????J-6??????????????J-10????????????????С?

 

2?????????

?糧????????????????????????????????????糧???????????????????????????????α???????210m?????????????????????????????????????????????????????????????????????????е?7#????45m?????????28m????????  ?85m?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

 

3????????????

3.1 ??????????????

?????????????????Χ???????????????????????????????????????????????????????????????

3.2 ?????п?λ?ú??п???????????

?????????п?????????????????????????????п?λ????????п???????????????????1.4m????????7.4m??????????????8.52m?????53.53m?????????????????????????????飬?????п???????????Ρ?

3.3 ?????п????Lp????HP???

3.3.1?????п????Lp?????

?п??????С???????????????????????п????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????У???????????????????????????飬????п????????????210???????п??????????п???????L1p=8.52??2????210/360=31.2m??

3.3.2?????п???HP?????

?п???Hp???????????鰴???й???????

??1??HP???1/6~1/4??D   

??У?Hp???п????m??  D??????п?????????m??

??????????????????п??????H2p=2.84~4.26m??

??2???????п???Hp?????????????

??У???T?????????????kgf/cm2??Mn????T =5200kgf/cm2??A3????T =3800kgf/cm2??

P?????????п???????????kg??  S?????????????????????cm2??

D???п??????????m?? Zc??????п?????????????????0.39??????п????????????m??

???????????????????????????????????????????????п??????4.8m??

3.4 ???????λ??????????????????跽??

?????????????????????????????????????????????????????????????????????????п??Χ?????????1???????????????????????趨λ??????????????????????λ??????2???迪?????С?????????????????????????7??????????????????????п????????????????????????????????У??????????λ????3.5m????4.8m????????300??????????1.5m????4.8m?????????????????????3.5m????7.25m?????????????????????????????????????????и???????и????????????????????ɡ?

3.5 ?????п???????

????п??????????????1??

??           ??1   ????????????????                                              

???????cm)  ?????(cm)  ???(cm)  ???(cm)  ????(cm)  ?п????m??  ???? ?K/m3 

??   70           35          45         45       50         4.8          1.0~1.5    

3.6 ??????????????

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3.7 ????????λ?????????

??1?????????????????????????????????????????????????п??????????????????????????????????п????????????????п??????????????????????????????????????????????????????????????????????????????????????????????ǹ???г????

??2???????????????????????????????????????飬???????????????????????????????ж???и????С??1.0m???и???????????????????????

??3????????????????????????????????е?????????????????????????????????????????????????????????????????????????????????

4???????????

???????????У???????????????????????????????????????С???????????????????????????С????????????????????Ч????????Χ?????????????????????????????????????????????????????????????λ??????????????????????α?????????????????????

??1?????????????

??????????????????????????????????????????????????????????????????????????????????飬?????????????Χ???????40m???????????????????5?????????????????????6m??????1??1.5m????????2.0m??2.5m??3.0m??3.5m??4.0m????????????渲???????????????????????塣???????????????λ??????????????????????5m????????

??2??????????????????????

??????????????????????????????????λ????????????????????????????????????????????????????????????

5??????Ч??

???????2008??11??11??????16??30???????????3??????????????????????????в?????????????16?????????????????????????????????п??????????????????????·?????????????????????????????????????????????Χ????????????飬??Χ??????????б???????????????????????????????????α??????????5???6????????????????2??180??????????????????????????????ǹ????????????????????????????????

  

 

?ο??????????ɡ???????л??????????????????????????????180m???????????????????????????

 

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