發文作者:Wonderland Villas Focus Group | 九月 16, 2009

高鐵隧道工程, 影響不大?

根據7/24/2009港鐵在華景山莊所做的簡介會資料, 高鐵擬建路線, 將穿越第廿一座地底的隧道, 是用炸藥爆破方法建造. 港鐵一再強調此法在香港相當普遍, 並且沒有影響樓宇的結構.  況且, 擬建的隧道是距21座地基約200米.

20座的王主席於9/16/2009 在Yahoo! Answer 提出上述的境況, 邀請對土木工程有認識的人提供答案. 他們的看法與港鐵大異.

1)     炸藥爆破所引發的沖擊波, 絕對會損害到花崗岩層及建於其上的樓宇結構. 並且, 爆破進行時, 會卽時為樓內住客帶來像地震一樣的振盪和驚嚇.

2)     炸藥爆破方法很大程度看隧道上下石層的密度, 因為爆炸所 引致的振動, 有可能由土壤轉移至其上之樓宇, 構成由輕微至嚴重之損毁.

3)     “地層全是岩石”?  那可能是最壞的境況. 誰知道那樓宇是否建於岩石斷層上. 爆炸方法可能引發不想見之後果. 詳細及小心的測量加老式挖鑽方法, 或可考慮. 繁忙的交通流量所引致的振盪, 也是另一應細想的因素.

當然, 我們還需要好好的研究, 再作評估.

A building is situated on a mountain mainly composed of Rocks. There will be tunnel built right passing through the building about 200 meters down. In building the tunnel, which is an Express Train Railway, explosions will be necessary. The questions is such explosion and contrustion work will have any effect on the building structure or not?

1)      Indeed, explosions will provoke shock waves very harm-full to the rock, and the structure of the building itself. Also, very noticeable to the people that live in the building, it may produce immediate panick as the oscillatory and trepidatory movements are similar to those of an earthquake.
To excavate a tunnel under the conditions exposed, the least the designers would recommend is to blast the hole out, most likely they would drill they way through with diamond tipped special drilling equipment.

2)  Yes depending on the density of the rocks above the tunnel and below the building the vibrations from the explosions could transfer through the soil and cause minor to very severe structural damage. Plus with the building being on the mountain disrupting the tension in the rocks could release an earthquake, because mountains are or could still be in seismic areas.

3)  Mainly composed of rocks"????
That’s probably the worst case scenario.
There may be fault lines in the area supporting that building
that blasting could set in motion.
Even drilling such a tunnel with a boring maching would require
careful survey of the conditions.
The vibration caused by the heavy rail traffic would also be a factor.

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  1. […] 愚婦行動之二 高鐵隧道工程, 影響不大? […]


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