Assessment of Construction Points for Grade Control and Reference in 3D

Cho, Yong Kwon; Park, Jisoo

i

Assessment of Construction Points for Grade Control and Reference in 3D

2019-01-01
By Cho, Yong Kwon ; Park, Jisoo

File Language:

English

Details

Creators:

Cho, Yong Kwon ; Park, Jisoo
Corporate Creators:

Georgia Institute of Technology, Office of Performance-Based Management and Research
Corporate Contributors:

Georgia. Department of Transportation. Office of Performance-Based Management & Research ; United States. Department of Transportation ; United States. Federal Highway Administration
Subject/TRT Terms:
Publication/ Report Number:

FHWA-GA-19-1618
Resource Type:

Tech Report
Geographical Coverage:

Georgia ; United States
Edition:

Final; July 2016 - January 2019
Corporate Publisher:

Georgia. Dept. of Transportation
Abstract:

The objective of this research is to investigate the causes of inaccuracies of grade elevations from current practices and identify best practices for grade control and referencing on transportation infrastructure construction projects in Georgia. A nationwide questionnaire survey was conducted with contractors, engineers, surveyors, and owners, and the following causes of the discrepancies are identified: (1) long time gap between design and construction phases; (2) poor techniques in surveying; and (3) long interval between survey points. Through an actual case study with an ongoing highway construction project, the following conclusions and recommendations are made: (1) a mandatory field survey before earth moving is recommended; (2) unmanned aerial vehicle (UAV) and Mobile Mapping System (MMS) are effective for 3D grade control in planning and site cleaning phases; (3) terrestrial laser scanning (TLS) is appropriate for 3D grade control in a subgrade grading stage; and (4) robotic total station (RTS) is recommended for the final grading stage.
Format:

PDF
Funding:

0015155
Download URL:

https://rosap.ntl.bts.gov/view/dot/40280/dot_40280_DS1.pdf
File Type:

[PDF - 2.98 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha256:b2681cf2b2b52b5a1082704fa831c6e94bc0f8b2c1cbf5fbf7182d3f32083b37

File Language:

English

ON THIS PAGE

Details

Found an issue?

Send us an email at:

publishinghd@cdc.gov

ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.