One section of passenger access tunnel at Sai Ying Pun is still underway as it involves an extremely delicate piece of tunneling

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One section of passenger access tunnel at Sai Ying Pun is still underway as it involves an extremely delicate piece of tunneling

机译：西营盘的一段乘客通道仍在进行中，因为其中涉及一条极为微妙的隧道

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This section of 100m long tunnel in water bearing decomposed granite varies from 25m to 35m below ground, passing below several buildings including an ageing multi storey block of flats built more than 50 years ago supported on H-piles founded within 3m of the tunnel being constructed. To limit the risk of causing subsidence damage so close to the alignment, MTR decided to undertake the biggest ground freezing operation ever carried out in Hong Kong to stabilise the ground during excavation work. Ground freezing is now underway, but it is a slow process, even after all the necessary building permits have been obtained.

机译：这条长100m的隧道位于含水分解花岗岩中，地下距离从25m到35m不等，经过了几栋建筑物下方，包括一座建于50多年前的老旧多层公寓楼，由正在建造的隧道3m内的H桩支撑。为了限制在如此高度的路线附近造成塌陷破坏的风险，地铁公司决定进行香港有史以来最大的地面冻结操作，以在开挖工作中稳定地面。地面冻结目前正在进行中，但这是一个缓慢的过程，即使已获得所有必要的建筑许可证也是如此。

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《New civil engineer》 |2014年第16期|26-26|共1页
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One section of passenger access tunnel at Sai Ying Pun is still underway as it involves an extremely delicate piece of tunneling

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