180m????????????????????
180m????????????????????
BlaSting Demolition 180m-h Reinfloroed Concrete Chilnney
????? ???? л??? ????
(???????????????????????????2 10007)
???????????????????У??????????????????????γ??????????180m?????????????????????????????????????????????????????????????????????????????ο??????
?????????????????λ?п????????
1 ??????
??????????????????ι???????????????????С????????????????????????????????????????????1??4??????50kw??5??6??????125kW??80m?????????????????180m?????????????????
????????α????????α???1??6???????????(??205m????81m????46.55m)?????80m????????????????????????????????????35m???????????220kV????40m???????????糧??????????19m???????????????????????????????????
????α???180m??????????????????????????????????????
1.1 ??????????
180m????????????????7.98m?????7.56m?????0.42m?????????2.58m?????2.42m?????0.20m?????????5m????????????0.24m???????????????????????????0.10m??????????????1???????????????????5m???????8.4m????4.8m(8.4??12.5m??Χ?????????12.5m????????????????)????????????13.4m????21??25m????Χ??????????棬25??32m??????????O??55m????????????C30??55??130m????????????C25??130m???????????????C20????????????????????2217m3??????????61.59m3?????????????5542t??
1.2 ??Χ????
???????????????(?1)??180m????????????????????95m???????????糧155m???????????Χ?161m??????Χ??????178m???????????糧?????????????178m??????Χ????????????182m???????????????163m??
?1 ??Χ????????
Fig.1 Surroundings of the areas
1.3 ???????
1.3.1 ?????????
?????????????????????У??????Χ??????????????????????????????????????????????????????б??????????????????????????????????????????????糧??????糧???????????5???6?????????110kV??220kV???????????豸??????????С?
1.3.2 ??????????
?????????????????????????????????????籣???????????????????????????(1)??????????<0.25cm/s??(2)??籣?????<0.25cm/s??(3)?????????繹
???<0.5cm/s??
1.3.3 ???????
??????????????????????????豸?????????????Σ?????????????豸???????裬???????????Ч????????????????????????????????????????????????豸??
2 ???????
2.1 ???????
2.1.1?п?λ??
?????????????13.4m???????????????????????????п????????????????8m(?п???????21.4m)???м??????????8m????????????????????????????壻???п????????????????10m(?п???????23.4m)???м??????????10m?????????????????????????????????????壻???????п???????25m?????????????11.6m???????п????????????????????????????????????0.8m??
2.1.2 ????????
??????????????????????????178m???????25??28m????λ?п????????????????155m??????????????????????????????????????????????????????λ???????????????????????
2.1.3 ????????
??????Χ??????????????????????????????Χ????????????????????????????????????????????
2.2 ??????????
???????п?λ??25??28m???п???3m???????????220.8?????????п??м俪?趨??3?????????????λ??1??????????????????????
(1)??С??????W=B/2??B???????硣
(2)?????a=KaW??Ka=1.0??1.5??
(3)??????b=Kba??Kb=0.66??1.0??
(4)??????L=KLH??H??????????????KL???????????????KL=O??665??
(5)?????????
???A??????????????????A??1??8??????????(???????????)A=5??
KB???????????????KB=2??3??
Kf????????????????????????棬Kf????1.0??O.9??0.66??0.5??
KP???????????????????????????B<0??8???KP=09/B??
W??????С??????m??
????180m?????25??28m?????磬??????????????????????1?С?????
???????黯??18.72kg?????553????
??1 ???????
Table 1 Blasting parameters
2.3 ????·
???÷?絼????????·??????2??????????????????????????·??
3 ??????????????
3.1 ?????????????
????????????????????Χ????????????????????????????????????????????????
Q=R3[????/K??K1] 3/??
R????????????????????????m??
?????????????????????????cm/s??
K????????????й???????
K1??????????????
????????????????????
????????????????????糧????????顢???????????籣??????????????????????????R=155m?? ??=0.25cm/s??K=150??K1=0.2????=2.0???????????????????????Q=2027kg?????????????????56.16kg??
3.2 ????????????????????????
?????????????????м???????????????
180m??????????155m??130m??105m??80m??55m?????ú??????????????????????????2m?????4m?????40m????????2m????????????????????ú????????????6??????3m??????????????????ú??????????棬???0.5m?????????????????????6m??????????????????????????????3m???????γ????濪????????????????????????????????????????????15m????????????
4 ????Ч??
?????????????2??
?2 ???????
Fig.2 Photos oflhe blasting demolishment
????????15??924s???????????????????????????鶨λ???????????????????1.5??(??????????????120m?????????????б)????????????飬????????κ??ж???飬?????????????????????????????????????????????????15m???棬?????????????26m??????????????20m????δ??????????????顣
???????????????Χ???(??????????182m???????????????30m)?????????????????
?????????????????0.2448cm/s??
??8s????п??????????????????0.04cm/s??
??11.68s?????????????????????0.191cm/s??
??15.924s??????????????????α??????