Spring thaw predictor & development of real time spring load restrictions.

Eaton, Robert A.; Kestler, Maureen; Hall, Andrew

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Spring thaw predictor & development of real time spring load restrictions.

2011-02-01
By Eaton, Robert A. ; Kestler, Maureen ; Hall, Andrew

File Language:

English

Details

Creators:

Eaton, Robert A. ; Kestler, Maureen ; Hall, Andrew
Corporate Creators:

New Hampshire. Dept. of Transportation ; United States. Forest Service
Corporate Contributors:

United States. Federal Highway Administration
Subject/TRT Terms:
Publication/ Report Number:

FHWA-NH-RD-14282K
Resource Type:

Tech Report
Geographical Coverage:

New Hampshire
Corporate Publisher:

Michigan. Dept. of Transportation
Abstract:

This report summarizes the results of a study to develop a correlation between weather forecasts and the ; spring thaw in order to reduce the duration of load limits on New Hampshire roadways. The study used a falling ; weight deflectometer at 10 sites in central New Hampshire to determine the changes in road subgrade strength. ; Weather condition and frost depth data was collected at the same time. ; The goal of the study was to calibrate the Enhanced Integrated Climate Model (EICM) within the Mechanistic ; Empirical Pavement Design Guide (MEPDG) using correlations developed between the subsurface conditions ; and the strength testing. ; The project did not provide sufficient data to provide a definite conclusion as to when load restrictions should ; be lifted during the spring thaw. Some key observations: subsurface thawing can progress rapidly; subsurface ; strength may take up to five (5) weeks to recover, especially in wetter subgrade soils; subgrade soils were ; weakest after the date when frost was out of the soil; saturated soils lost strength during the spring thaw.
Format:

PDF
Funding:

14282K, A000(504)
Download URL:

https://rosap.ntl.bts.gov/view/dot/29151/dot_29151_DS1.pdf
File Type:

[PDF - 6.30 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha256:9c5e0a8b9a59c9482d79625da196ee6410b7c6b6bf532dae04c526d1905bb476

File Language:

English

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