responses

I D

1. How can errors occur in preparing soil reports?

Borings are needed to do an adequate soil report. The information shown on the boring logs is representative of conditions at the boring locations only. The assumption that conditions between borings are the same as conditions represented by the borings is one that may not always be warranted. It is because of this that errors can occur when preparing soil reports.

Respond

2. On a 10-acre site where four borings are made sampling at 5-foot depth intervals, what percentage of the ground is actually sampled?

7.54%

Respond

3. How many borings are needed to do an adequate soil report?

The quantity of borings depends on many factors, but at least four borings close to the corners of the building are required, with additional borings about 50 to 100 feet apart.

Respond

D G

2. On a 10-acre site where four borings are made sampling at 5-foot depth intervals, what percentage of the ground is actually sampled?

Assumptions:

Area ratio = max cross sectional area of the cutting edge

Area of the soil sample

AR = D22 – D12 x 100

D12

D1 = 5’ depth D2 = 5 x 104 = 5.2’

100

AR= 5.22 - 52 x 100 = 7.54% (Therefore, 7.54% is what was actually sampled).

5.22

Resspond

3. How many borings are needed to do an adequate soil report?

There are many factors that can determine how many borings are needed. In any case, there should be at least four borings on the corners of the buildings with additional every 50 – 100 ft apart.

Respond

4. Is it possible to explore the wrong site entirely?

Anything is possible. If you are given the incorrect survey or site plan, you can end up at the wrong site.

Respond

J R

1. How can errors occur in preparing soil reports?

Using the incorrect testing procedure on soil types.

Not following the written test procedures can create variances in the results.

Submitting soil samples for testing that are not representative of the project site, both in plan an elevation. This can create unrealistic bids or unforeseen construction problems.

Labeling soil samples incorrectly, not storing or testing the soil in a timely manner can alter the soils properties.

Respond

2. On a 10-acre site where four borings are made sampling at 5-foot depth intervals, what percentage of the ground is actually sampled?

Sampled ground percentage is 7.54 percent.

Respond

3. How many borings are needed to do an adequate soil report?

An adequate soil report will require a minimum of 2 – 4 borings per site.

Respond