原始标题
HS2: Large hole opens above rail tunnel near Little Missenden
新闻网址
https://www.bbc.com/news/uk-england-beds-bucks-herts-65590981
发表日期
推定为2023年5月15日
(刚才去看时，日期标示为“5 days ago”，故如此推定。)
全文完整内容
A large hole has opened up above a tunnel built for the HS2 high
speed rail line.
A spokesperson for HS2 Ltd said the opening in the ground near
Little Missenden, Buckinghamshire, was above part of the Chiltern
tunnel.
It said they were engaging with the landowner and had notified the
Environment Agency.
The spokesperson said investigations were ongoing but it was
likely linked to "pre-existing ground conditions".
Campaigners against HS2 said the hole, which they said measured
about 6m (20ft) in diameter and was 5m (16ft) deep, showed it was "
time to stop digging".
The 10-mile (16km) Chiltern tunnel is the longest on the HS2
project, which is designed to improve links between London, Birmingham
and the north of England.
HS2 Ltd said the site had been sealed off and "there is no risk to
the public".
Giant tunnelling machines have been excavating the high speed rail
project's route under the Chilterns in Buckinghamshire for the past 21
months.
The two tunnels, which are between the M25 and South Heath, have
five shafts for emergency access and/or ventilation near Chalfont St
Peter, Chalfont St Giles, Amersham, Little Missenden and Chesham Road.
They are part of first phase of the route between London and the
West Midlands, expected to begin operating between 2029 and 2033.
Eventually the route will link to Manchester, and potentially
beyond.
The project has faced criticism about the impact it would have on
the land the route would take, with campaigners fighting against plans
to build on woodland.
英国正在兴建HS2高铁，
第一期计画是伦敦到西密德兰、预计2029到2033年之间会通车启用。
这次塌陷的地点是在白金汉郡Chiltern隧道工地上方地面，
HS2的发言人说，天坑附近已经封闭、对公众没有危险，
已经设法联络地主、也已经向环境署通报；
他也说，目前相关调查还在进行，
但事发原因似乎指向既有的地质问题。
反HS2人士说，那座天坑直径约6公尺、深约5公尺，
这显示“该停止挖掘了”。
这条隧道长约16公里、是整个HS2最长的隧道，
设有五座竖井供逃生及/或通风用，已经开工21个月。
心得感想
1.这是后续报导，刚才看到日期标示写的是4天前。
https://www.bbc.com/news/uk-england-beds-bucks-herts-65596542
里面提到事发时间是5/13星期六。
虽然HS2发言人说没有危险，邻近的Amersham市民还是很担心。
市长说：
a/他认为天坑的直径约6公尺，
且深度也至少6公尺、甚至可能深达10公尺。
b/由于这边的地下含水层是他们的自来水源，
且附近也有罕见的白垩地质河谷，
这几年来他们一直关注挖隧道对这些有何影响、
而这次塌陷事件更引起市民普遍注意。
c/很多市民会在这里散步，
也有农民在这里让马活动(原文是exercising horses)、
若塌陷时刚好有人，怎么办？
其他受访市民也提到那边是附近居民休闲要地、假日人潮也很多，
也有的担心会不会又塌，更有人抱怨HS2讲得不够清楚。
2.我4、5天前在BBC News英文版脸书粉专看到时就要贴这篇，但是没有空；
我刚才也看了板上这5天都没人贴，所以现在贴。
3.希望一切平安。