有谁知道Minto Acadia那边（Scotia bank place北）新房的地基是否会有沉降问题？
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下面这个网站可以搜到报批city的所有的地产开发项目。
http://app01.ottawa.ca/postingplans/home.jsf?lang=en
例如这个项目，就搜索huntmar。
最好的是每个项目都列出了city planer的名字和联系方式，他们有义务要回答市民的问题。而且city planer和开发商的project manager有着频繁的联系，我问的关于地基的问题就被city planer转发给了minto的project manager。Project manager也及时回答了问题，并且在信中CC了Minto的land development manager。相信这些人应该是对项目了解最多的。
P.S. 由于这个网站建立时间是2008-2009年，所以2008年之前的项目都没有。
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谢谢你的信息！明确一下，你的意思是说，去lakes买高价房的人对房子会更加picky所以lakes那边的房子会不好卖是么？
我也和某位sales聊了下，她说导致价格区别的原因，除了施工成本外还有人们对Kanata Lakes的品牌的认可。当初开发商从政府手里买的lakes的地就比南边贵。而且Cardel和Uniform在很多人眼中是“高档房”的代名词。其实坐下来想想，好像真是这么回事，周围很多人（不管是中国人还是本地人）一听到Kanata Lakes，Cardel就觉得那是高档社区高档房。非lakes，Minto/Mattamy/Richcraft之类的房子，就被带上了中档社区中档房的帽子。就好比买衣服，包，都追求品牌的心理是一样的。
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foundation
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My comments for the lower elevation of the house
I would like to put my comments on this as below.
The minimum bearing capacity in Ottawa is 5ton/sm, usually the silty clay soild itself can reach this bottom line. without consideration of frost heave on soil, this capacity can be expected for max. 25mm settlement evenly in long term. So settlement will be happened no matter what. Water content in the soil will not bother the construction, during construction, the drainage will be provide to redirect or sump the groundwater to somewhere else, and then the subgrade has to be compacted by standard lift to reach designed capacity, or replace the mud by gravel B. once the house has been built, due to gravity of the house, as long as the drainage around house is sufficient, it will not have water intruding into the soil under the footing. The pad underneath of footing (mentioned as poly in your post) is rigid insulation, which has to be provided for the footing embedded into the soil less than 1.5~1.8meters in depth in Ottawa. It is not related to the settlement theoretically, it only prevent frost heave during winter, the frost heave will push your house up somewhere along the footing. And once frost heave happens, it is very hard to be eliminated.
So as you can see, the key issue is drainage around house. For somewhere with lower elevation such as the houses just beside the toe of the hill, the sump pit with drainage pipes are constructed on the ground of your garage or basement to redirect the rain water into the plumbing system. But all the solutions are based on possibility study for the rain in the local place such as 1/50years return. But the lower elevation for the community definitely is a weak point no matter how well the drainage system has been built because the possibility study is always based on the history, and the future always has surprise especially in the nature. So I would suggest, you pay for what you get. The less money you pay, the less satisfaction you get. For me, I will put this concern into my first priority when I choose the house; especially there were so many floods in the world during the last several years.
I would like to put my comments on this as below.
The minimum bearing capacity in Ottawa is 5ton/sm, usually the silty clay soild itself can reach this bottom line. without consideration of frost heave on soil, this capacity can be expected for max. 25mm settlement evenly in long term. So settlement will be happened no matter what. Water content in the soil will not bother the construction, during construction, the drainage will be provide to redirect or sump the groundwater to somewhere else, and then the subgrade has to be compacted by standard lift to reach designed capacity, or replace the mud by gravel B. once the house has been built, due to gravity of the house, as long as the drainage around house is sufficient, it will not have water intruding into the soil under the footing. The pad underneath of footing (mentioned as poly in your post) is rigid insulation, which has to be provided for the footing embedded into the soil less than 1.5~1.8meters in depth in Ottawa. It is not related to the settlement theoretically, it only prevent frost heave during winter, the frost heave will push your house up somewhere along the footing. And once frost heave happens, it is very hard to be eliminated.
So as you can see, the key issue is drainage around house. For somewhere with lower elevation such as the houses just beside the toe of the hill, the sump pit with drainage pipes are constructed on the ground of your garage or basement to redirect the rain water into the plumbing system. But all the solutions are based on possibility study for the rain in the local place such as 1/50years return. But the lower elevation for the community definitely is a weak point no matter how well the drainage system has been built because the possibility study is always based on the history, and the future always has surprise especially in the nature. So I would suggest, you pay for what you get. The less money you pay, the less satisfaction you get. For me, I will put this concern into my first priority when I choose the house; especially there were so many floods in the world during the last several years.
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Just in case you have not read this...
Personally I would pay more attention to the noise coming from HW-417..and potential heavy local traffic by the upcmoming outlet mall...
http://webcast.ottawa.ca/plan/All_I...ference_Planning Rationale D02-02-11-0036.PDF
....
Geotechnical Study – Paterson Group, July 2007
The report finds that generally, the subsoil conditions consist of overlying silty
clay and glacial till, which, in turn, is underlain by bedrock. The upper portion of
the silty clay is a brown weathered crust of stiff consistency. The deeper grey
silty clay underlying the surficial crust ranges from soft to stiff in consistency.
There are minimum grade raise requirements (identified by IBI Group) on the
lower-lying north half of the property as a result of servicing constraints
however it is notable that the compressibility of the silty clay materials will
impose grade raise restrictions. Where the proposed grade raise is less than the
permissible grade raise, it is anticipated that the lighter structures will be
founded on shallow footings placed in the upper-weathered crust of the silty
clay deposit, whereas heavier structures (e.g. tall commercial buildings) will be
founded on bedrock using a deep foundation alternative, such as piles. Where
greater than permissible grade raises are proposed, means to reduce the
potential long-term post-construction settlements should be implemented, such
as pre-loading or surcharging, and/or pile foundations should be used.
The report provides specific recommendations for site grading and preparation,
foundation design, settlement and grade raise restrictions, foundation options,
pavement and design and construction precautions.
Stormwater Management Report – IBI Group, November 2010
A phased approach to stormwater management is recommended for the Arcadia
site in the report prepared by IBI Group (November 2010). The interim drainage
scheme consists of a single stormwater management facility located to the
northeast of the Phase 1 and 2 development area, outside of the 1:100 year
flood plain. The Phase 1 and 2 development area can be described as the westhalf
of the Arcadia Residential lands on the north side of Campeau Drive and the
small commercial block at the intersection of Huntmar and Campeau Drive.
The permanent drainage scheme, which will accommodate the entire Arcadia
site (Residential development north of Campeau Drive and Commercial
development south of Campeau Drive), consists of a single stormwater
management facility located adjacent to the Carp River, inside the current 1:100
year flood plain boundary. The facility will provide water quality control to MOE
Level 2 protection (70% removal of TSS) for the 80.89ha Arcadia development
and will discharge into the Carp River.
As a result of the March 30, 2011 approval of the EAs by the Minister of the
Environment (referenced in more detail on page 17), which set forth a special
conditions for stormwater storage, the area and size of the proposed pond will
be finalized over the next months. The proposed Concept Plan and Zoning Bylaw
Amendment will contribute valuable information to the stormwater
management modelling and calculations.
Personally I would pay more attention to the noise coming from HW-417..and potential heavy local traffic by the upcmoming outlet mall...
http://webcast.ottawa.ca/plan/All_I...ference_Planning Rationale D02-02-11-0036.PDF
....
Geotechnical Study – Paterson Group, July 2007
The report finds that generally, the subsoil conditions consist of overlying silty
clay and glacial till, which, in turn, is underlain by bedrock. The upper portion of
the silty clay is a brown weathered crust of stiff consistency. The deeper grey
silty clay underlying the surficial crust ranges from soft to stiff in consistency.
There are minimum grade raise requirements (identified by IBI Group) on the
lower-lying north half of the property as a result of servicing constraints
however it is notable that the compressibility of the silty clay materials will
impose grade raise restrictions. Where the proposed grade raise is less than the
permissible grade raise, it is anticipated that the lighter structures will be
founded on shallow footings placed in the upper-weathered crust of the silty
clay deposit, whereas heavier structures (e.g. tall commercial buildings) will be
founded on bedrock using a deep foundation alternative, such as piles. Where
greater than permissible grade raises are proposed, means to reduce the
potential long-term post-construction settlements should be implemented, such
as pre-loading or surcharging, and/or pile foundations should be used.
The report provides specific recommendations for site grading and preparation,
foundation design, settlement and grade raise restrictions, foundation options,
pavement and design and construction precautions.
Stormwater Management Report – IBI Group, November 2010
A phased approach to stormwater management is recommended for the Arcadia
site in the report prepared by IBI Group (November 2010). The interim drainage
scheme consists of a single stormwater management facility located to the
northeast of the Phase 1 and 2 development area, outside of the 1:100 year
flood plain. The Phase 1 and 2 development area can be described as the westhalf
of the Arcadia Residential lands on the north side of Campeau Drive and the
small commercial block at the intersection of Huntmar and Campeau Drive.
The permanent drainage scheme, which will accommodate the entire Arcadia
site (Residential development north of Campeau Drive and Commercial
development south of Campeau Drive), consists of a single stormwater
management facility located adjacent to the Carp River, inside the current 1:100
year flood plain boundary. The facility will provide water quality control to MOE
Level 2 protection (70% removal of TSS) for the 80.89ha Arcadia development
and will discharge into the Carp River.
As a result of the March 30, 2011 approval of the EAs by the Minister of the
Environment (referenced in more detail on page 17), which set forth a special
conditions for stormwater storage, the area and size of the proposed pond will
be finalized over the next months. The proposed Concept Plan and Zoning Bylaw
Amendment will contribute valuable information to the stormwater
management modelling and calculations.
zhangliottawa
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zhangliottawa
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