精华 Geo tech report

[qiuyi_1]

Finally we got the Geo tech report from Tartan regarding the soil conditions for Phase 5 in Findley Creek.

 

[基础墙]

Has it mentioned how many boreholes are done in the area? How far are they from each other? Any cross sections included in the report? What does the sublayer description say? Any testing results, like SPT and soil properties, are given?

 

[qiuyi_1]

following is the letter sent by the geo-engineering company. any comments?

As part of the geotechnical investigation for this development. we drilled several boreholes within the XXXXx area. Those boreholes indicate the soil conditions to consist of up to about 0.5 metres of peat, overlying sand. silt, and glacial till, with the underlying bedrock at about 5 to 6 metres depth.
Peat is an organic and weak soil. The peat is therefore not suitable for the support of houses and will be removed from the house areas prior to construction of the foundations. The underlying sand and silt are not compressible soils and are quite suitable for tlie support of house foundations. Many other areas of Ottawa are underlain by compressible Leda clays, which have been the cause of recent publicized cases of house foundation settlements: these soils are not present beneath the Netley Circle area
When the foundations of these houses are constructed, geoteclinical engineering staff will inspect the foundation areas to confirm that the peal has been entirely removed and that the soils that will support the houses are acceptable.

 

[bubbleface]

I am buying house too. Could u plz tell us how did you get this report? can I get it on my own? or has to go through the builder?

 

[qiuyi_1]

i've been demanding this for quite a long time and finally they reluctantly gave me this, not the original report, but a summary letter from the consultancy company.

If you are to buy a new house, I definitely suggest you to get hold of these 2:
- the official plan of the city
- the geo report.

the former can be obtained from the city without any hussle, the latter you need to fight with the builder, throu the sales or directly ask for their sales director or even the owner. when I phoned the city officials, they told me they don't see any reason why they should hide this from you unless there's a problem.

so talk to you sales, and just before you are about to put a deposit on a lot, make it conditional unpon receiving the geo report certifying there's no Leda clays.

good luck,

 

[qiuyi_1]

最初由 基础墙 发布
Has it mentioned how many boreholes are done in the area? How far are they from each other? Any cross sections included in the report? What does the sublayer description say? Any testing results, like SPT and soil properties, are given?

too techincal for me. eg what's the SPT? have you any comments on the summary letter from the engineer above? do you see anything missing? anything worth further digging? appreciate it.

 

[qiuyi_1]

one tip that can save you a few bucks towards ur downpaymnt...

最初由 bubbleface 发布
I am buying house too. Could u plz tell us how did you get this report? can I get it on my own? or has to go through the builder?

if you havn't done so, when you first go to a new builder, contact an r-s agent and have him registered as your agent. you can split his commission with the agent. I missed that on my first home and forgot it again on my 2nd.

hope this tips dsn't arrive too late.

 

[基础墙]

Till is a good load-bearing sublayer. Sand and silt, depends on their state and property. SPT (Standard Penatration Test) is commonly used to determin the bearing capacity of the soil, and it's reliable for sandy soils. If the SPT No. and the soil type are given, you could find the bearing capacity from charts.

Did they mention the thickness of each layers? the foundation will definitely not go down to the bedrock, which is -6m. The bearing layer should start at -1.5 ~ -2.5m.

Good news is that you don't have to worry about the long-term settlement. settlement would become stablized within the first year. Bearing capacity won't be a big problem, if the foundation sit on undisturbed soil, sand or silt. Bad thing for fine sand and silt is that they're sensitive to the freezing/melting cycle. Whenever you want put additions on the house, be sure the foundation goes down to 1.5m or deeper, and it is properly shaped.

The key point here is the construction -- undisturbed soil means the soil is in its origional state, not refilled, not disturbed by construction or weather. For example, if the excavation have exposed for a long time, rain and surface water would "disturb" the soil. Normally the contractor will 1) set proper drainage right after the excavation, and 2) cast the foundation wall a.s.a.p.

 

[基础墙]

另外，除了这个summary，报告里就没有别的了吗？挺想看看有图表数据什么的没有，只是好奇。

 

[qiuyi_1]

there's nothing else besides the above letter. as I said it's a summary letter from the consultant,Golder Associates [do you happen to know them? ]. when I received this letter, I didn't know what further info or clarification I should ask for-and I guees this what they are counting on. Fortunately I've a group of experts behind me here at CFC..

I don't know why they didn't want give out the geo report. is it because of the copyright owned by the consultant or the builder considers it as business confidentials?

to be an informed buyer is very important point to me.

 

[qiuyi_1]

从我拿到的那封信无法知道SPT No、打洞的密度是多少、各层土各有多厚。我会再进一步交涉。那封信就是糊弄我们的，但由于我不懂技术内容，无从下手，不知道还需要问那些进一步的信息。现在有zhuanjia指导，我会再与他们联系。根据上面那封信，你看还有什么需要问得？十分感谢。

 

[油画批发零售]

the basement and garage floors in my house have cracks, I'm afraid that is due to soil. How can get the report on the soil that the house alraedy built?

 

[qiuyi_1]

最初由 油画批发零售 发布
the basement and garage floors in my house have cracks, I'm afraid that is due to soil. How can get the report on the soil that the house alraedy built?

I've no experience in dealing with builders re after-sale service. I suggest you to call city planning department, ask for the planner of your subdivision, then talk to him/her. You will have to leave your phone no and they will call you back. Expect a dozen of calls before yhou reach the right person.

make sure you will be there when he/she returns ur call. talk to him about your problem and ask for help.

with some pressure, you should be able to get the soil conditions report from them. if you don't cooperate, speak to the city councillor of your ward, it usullay works.

be patient and polite but persistent and dterminance.

good luck

 

[基础墙]

最初由 qiuyi_1 发布
从我拿到的那封信无法知道SPT No、打洞的密度是多少、各层土各有多厚。我会再进一步交涉。那封信就是糊弄我们的，但由于我不懂技术内容，无从下手，不知道还需要问那些进一步的信息。现在有zhuanjia指导，我会再与他们联系。根据上面那封信，你看还有什么需要问得？十分感谢。

Golder是大公司，做了很多年，名声也不错。按summary中列出的信息，那块地皮该算是不坏。

不知他们能提供的资料可以详细到什么程度。不过他给你的不是完整的报告。完整的Geotechnical Report中，你提到的数据都会有。只是Geotechnical Consulting Company都会限制报告的用途，注明这个报告只是给他的客户的。

要是打算进一步问，可以向developer要bore holelayout, cross section, and soil properties of the silt and the sand layers. 不知他们肯不肯给。

 

[bubbleface]

Re: one tip that can save you a few bucks towards ur downpaymnt...

最初由 qiuyi_1 发布


if you havn't done so, when you first go to a new builder, contact an r-s agent and have him registered as your agent. you can split his commission with the agent. I missed that on my first home and forgot it again on my 2nd.

hope this tips dsn't arrive too late.

Hey thanks for the tip! I haven't made an offer yet so it's right on time!

However, I still have to demand for the Geo report first...