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Surface Extensometer Installation Procedure

D. H. Yardley / C. R. Nelson / R. W. Rabus

This manual describes in detail the design, preparation, and installation of 6 point rod extensometers used to monitor deflections of the limestone roof of an underground test room to be excavated at the University of Minnesota. The extensometer design used is a modified version of the University of Illinois extensometer design. The layout of the test room and locations of the extensometers are presented as well as a diagram of the 6 point rod extensometer. Chapter headings are as follows: (1) Introduction; (2) Description of Extensometer; (3) Installation Procedure (Layout and Drilling of Extensometer Holes, Preparation of Extensometers, Field Installation); (4) Grouting Procedure; and (5) Extensometer Measurements.

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Surface Extensometer Installation Procedure

D. H. Yardley / C. R. Nelson / R. W. Rabus

This manual describes in detail the design, preparation, and installation of 6 point rod extensometers used to monitor deflections of the limestone roof of an underground test room to be excavated at the University of Minnesota. The extensometer design used is a modified version of the University of Illinois extensometer design. The layout of the test room and locations of the extensometers are presented as well as a diagram of the 6 point rod extensometer. Chapter headings are as follows: (1) Introduction; (2) Description of Extensometer; (3) Installation Procedure (Layout and Drilling of Extensometer Holes, Preparation of Extensometers, Field Installation); (4) Grouting Procedure; and (5) Extensometer Measurements.

Surface Extensometer Installation Procedure

D. H. Yardley / C. R. Nelson / R. W. Rabus

This manual describes in detail the design, preparation, and installation of 6 point rod extensometers used to monitor deflections of the limestone roof of an underground test room to be excavated at the University of Minnesota. The extensometer design used is a modified version of the University of Illinois extensometer design. The layout of the test room and locations of the extensometers are presented as well as a diagram of the 6 point rod extensometer. Chapter headings are as follows: (1) Introduction; (2) Description of Extensometer; (3) Installation Procedure (Layout and Drilling of Extensometer Holes, Preparation of Extensometers, Field Installation); (4) Grouting Procedure; and (5) Extensometer Measurements.

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Title:

Surface Extensometer Installation Procedure

Contributors:

D. H. Yardley (author) / C. R. Nelson (author) / R. W. Rabus (author)

Publication date:

1975

Size:

29 pages

Type of media:

Report

Type of material:

No indication

Language:

English

Keywords:

Civil Engineering , Subsurface structures , Monitors , Extensometers , Installation , Strain measuring instruments , Design , Fabrication , Drill holes , Grout

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