Why Do A Geotechnical Site Investigation?

 


Article by: Jere Botes

Good soil , Feng Shui In Your Home For The Placement Of Furniture information can lead to substantial savings and tighter foundation design , choosing colors and mixing colors and patterns because the design , Feng Shui In Your Home For The Placement Of Furniture parameters are well defined. The more comprehensive the information, , Foundation Repair Costs the more economically can a good structure be built. The object is to build a good building , Dishwasher Secrets - Make It Clean Perfectly cheaply and not to build a cheap building. , Guide to Finding the Best Mohawk, Berber or Carpet Tiles Geo-technical site investigations may cost up to 2% of the total project cost, but is very necessary as geo-technical engineers often say: you will pay for your geo-technical investigation anyway!

GEOTECHNICAL INVESTIGATION PROCEDURE

Initially one should find geological information , Cost of Home Remodeling for a specific site about the original rock type of the area and the soils , Guide to Finding the Best Mohawk, Berber or Carpet Tiles which are the weathered rock. This can be done at either the government printer or your local , How to stop squeaking in hardwood flooring geological board. If in doubt regarding the characteristics of the soil, , Commercial Patio Furniture consult an engineer or take soil , RV Generators samples from a test hole to a soil , Shower Filters - Why are they Important to Have? laboratory for analysis. Based on the results of this analysis, a recommendation can be made regarding the best foundation structure to use.

CLASSIFICATION OF SOIL TYPES

Sand:
Sand , How to Select an Installer for Your Solar Panels consists of discrete particles normally visible to the naked eye. Sand , Selecting A Canopy is clearly distinguishable by the presence of gritty particles which do not break down when rubbed on the palm , Shower Filters - Why are they Important to Have? of the hand.
Silt:
Silt consists of fine particles. In general silt particles are barely felt when rubbed with water , Developing a Garage Addition Building Plan and Estimating Garage Addition Costs on the palm. , choosing colors and mixing colors and patterns When this wetted soil , Prefabricated shower stalls come with their own watertight walls is placed on the tongue, the particles can be felt grating the against the enamel of the teeth.
Clay:
Clay consists of very fine particles. The particles are flaky and when rubbed on the palm , Commercial Patio Furniture with water , Laminate Flooring Is Built For The Twenty First Century has a soapy or greasy feeling. No sensation of grittiness can be detected when tasted.
Gravel:
Gravel , Tankless Water Heater Advantages consists of fragments of rock. The shape of the particles should be described as: rounded shape, oval shape, rounded corners, corners slightly bevelled, corners sharp or irregular.
Boulders:
Boulders are fragments of rock larger than 200mm.

Once the soil , How Much Do You Value Your Homeís Contents? Keep Them Covered. is classified and the composition of the grain particles are determined, one can make a recommendation as to which type of foundation or pile structure should be used. There are various types of clay and not all of them may be regarded as bad. Some are soft but are still stable. Collapsible soils , How to Select an Installer for Your Solar Panels are usually not very dense because of the high proportion of voids present.

Heaving or active clays contain minerals which cause the soil , Make Your Room Magical And Fascinating With Rustic Curtain Rods mass to react strongly to changes , Laminate Wood Flooring and the Benefits over Traditional Wood & Ceramic Tile regarding moisture , choosing colors and mixing colors and patterns content. These clays will swell when more moisture , Quality Futon Covers is added and will shrink as they dry out. The treatment of soft soils , How to stop squeaking in hardwood flooring is usually to make the foundations wider to reduce the pressure to an acceptable level so that the soil , choosing colors and mixing colors and patterns will be able to withstand the load with little or no settlement. Should the soil , How Much Do You Value Your Homeís Contents? Keep Them Covered. prove to be too soft or wet then a raft foundation or piling is recommended. A pile is a concrete , Make Your Room Magical And Fascinating With Rustic Curtain Rods column driven into the earth , Foundation Repair Costs which either carries the load down to a stronger soil , Keeping Your Shower Stalls Clean and Tidy or rock below or by hanging in friction on the soil , How to Select an Installer for Your Solar Panels around its shank.

RECOMMENDATIONS FOR PROBLEM SOILS

Clay soils
Clay is generally smooth and has no visible particles, it retains water , Keep The Clogs Out Of Your Kitchen Sinks and does not drain well. The presence of clay is sometimes indicated by cracks on the surface of the ground. This type of soil , Laminate Flooring - Should you Pick Glued Or Click? could pose a problem although some soft clays are quite stable. Heaving clay is very problematic and changes , How to Select an Installer for Your Solar Panels a lot when the moisture , Breathe Easy With Air Filters content changes. , Tarps-what you need to know before you buy

Recommendation: One should lay a compacted hardcore (of broken bricks, stones , Climbing Frames and Play Structures - Do you need planning permission ? etc.) under the concrete , Cost of Home Remodeling foundations but for heaving clay a raft foundation will often have to be used; also, depending on the extremeness of the heaving clay, the site can be thoroughly soaked once the trenches have been dug and building , Tips on how to give your bathroom a new look. can then begin when it has dried sufficiently. This 'sealing-in' of the moisture , Climbing Frames and Play Structures - Do you need planning permission ? greatly reduces subsoil movement, minimize the wet-dry cycle and the structure will only have to copy with minimal movement. However it is essential that a structural engineer should be consulted when dealing with heaving clay.

Collapsing soils
Low density soils , Quality Futon Covers contain voids, which often cause them to collapse and cause serious cracks to appear in the walls. , Flash Flood in A Pan!

Recommendation: Wider foundations can be laid or piling can be used.

Soft soil
Most buildings , Tips on how to give your bathroom a new look. are subject to some settling but soft soils , Breathe Easy With Air Filters will in some, although rare, instances provoke the kind of settlement that causes the entire structure to sink.

Recommendation: Foundations should be widened in order to reduce pressure to a level that will hold the load. Brickforce should also be laid on every 3rd brick course depending on the severity of the soft soil. , Have Romantic Ambiance with the Flick of a Switch!

Sandy soil
This type of soil , Dishwasher Secrets - Make It Clean Perfectly feels gritty and has no plasticity and has good drainage properties. , RV Generators Generally, sandy soil , Can't Find Anything in Your Closet? A Closet Organizer will Solve Your Problems! is not a problem but on a steeply sloping site, the weathered soil , choosing colors and mixing colors and patterns from the hill gradually slides down to the bottom and one might have collapsing soil , Homebuilding: Installing Sill Plates problems.

Recommendation: The area where is to be built can be re-filled with a stable soil , The Hidden Costs Of Picture Frames type to a depth decided by an engineer or one could use friction piling or end load bearing piling if the soil , Huff and Puff - Power Your Home with the Wind type below is suitable. One can also make used of wider foundations. It is also common practice to flood , Developing a Garage Addition Building Plan and Estimating Garage Addition Costs the ground once the trenches have been dug and then to compact thoroughly. This improves cohesion and makes the soil , Prefabricated shower stalls come with their own watertight walls considerably more stable to build on.

FOUNDATION CONSIDERATIONS

Foundations are important to ensure that the loads of the building , Tankless Water Heater Advantages above are transferred to solid ground capable of supporting these loads. Thus, the foundations should be able to carry the weight of the building , Keeping Your Shower Stalls Clean and Tidy without uneven settlement taking place, , Foundation Repair Costs which would result in cracking and potential collapse.

The topsoil on the site usually contains all kinds of vegetable , Huff and Puff - Power Your Home with the Wind matter which is easily compressed and would not be suitable for foundations, but is valuable as a top dressing for gardens , Keep The Clogs Out Of Your Kitchen Sinks and may be disposed of in this matter.

You should avoid at all costs any site where there is a chance of ground or shallow sub-surface water , Climbing Frames and Play Structures - Do you need planning permission ? remaining close to the base of the building, , The Hidden Costs Of Picture Frames therefore:

Avoid sites that can be flooded or be left in damp conditions

Make sure that water , Laminate Wood Flooring and the Benefits over Traditional Wood & Ceramic Tile coming off the roof , Owner Builders! Save the Dollars Build Your Home and Have Your Dream! and walls , Clutter Busters: Simple Strategies For Cleaning Up Your Act of the building , Staining Instead Of Painting Your Patio is moved quickly away from the base of the walls. , Homebuilding: Installing Sill Plates This can be done by compacting a protective sloping pavement (apron).

CONCLUSION

One should be very careful when building , Can't Find Anything in Your Closet? A Closet Organizer will Solve Your Problems! on unstable soils. , Owner Builders! Save the Dollars Build Your Home and Have Your Dream! When inadequate foundations cause cracking of walls , Feng Shui In Your Home For The Placement Of Furniture or other problems to occur, you will have to spend a lot of money to rectify the problem, and it will not only reduce your property's market value in future, also most house , The Hidden Costs Of Picture Frames insurance policies exclude coverage against subsidence and landslip damage caused by unstable soils. , Keep The Clogs Out Of Your Kitchen Sinks Never take any chances, consult a qualified geo-technical engineer when you are uncertain of your stand's soil , Selecting A Canopy conditions.

Please note: This document should be used as a guide only and the author accepts no responsibility for losses incurred as a result of advice , Are vent free gas fireplaces safe? followed in this document. The foundations of your proposed dwelling should always be discussed with your engineer.
Written by Jere Botes, architect & founder of http://www.dreamhouses.co.za, a website dedicated to provide home , How to stop squeaking in hardwood flooring builders, home , Make Your Room Magical And Fascinating With Rustic Curtain Rods renovators, home , Developing a Garage Addition Building Plan and Estimating Garage Addition Costs owners & developers with free professional advice , Laminate Wood Flooring and the Benefits over Traditional Wood & Ceramic Tile on all aspects of home , Foundation Repair Costs design, building , Tankless Water Heater Advantages & diy. , Whirlpool Refrigerator - Is It Right for You? Reproductions of this article are encouraged but must include a link pointing to http://www.dreamhouses.co.za

Article Source: http://EzineArticles.com/?expert=Jere_Botes

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