Assessment of rock excavatability

Kibria S., . and Vitale G., . and Iqbal M.S., . (2001) Assessment of rock excavatability. [Proceedings Paper]

Advance assessment of excavatability or rippability of various materials exposed on the ground and hidden below has a special significance in the engineering projects. The information as to the ease or difficulty likely to be encountered during excavations helps refine the project schedules guides the prospective contractors for rationalizing their bids and affords preparation of realistic cost estimates necessary for obtaining the financial approval. Various direct and indirect methods have been used by the engineers to figure out the relative excavatability of soils and rocks. These procedures include study of the geologic map close examination of drillhole logs for jointing/bedding details/RQD measurement of compression wave velocity using seismic refraction survey and direct excavation trials. The authors have attempted a cheap and quick procedure for estimating excavatability of limestone rocks for laying pipeline for a gas field project in Pakistan. This approach is based upon geologic/geomorphologic mapping limited drilling in-situ penetration testing using a pneumatic hammer recovery of rock cores compression testing of cores and a comparison between various observed / measured characteristics of various rocks to assess their relative as well as absolute rippability. The authors believe that such correlations may be developed for various materials whose excavatability is to be evaluated at the expense of minimum cost and time.

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Abstract

Advance assessment of excavatability or rippability of various materials exposed on the ground and hidden below has a special significance in the engineering projects. The information as to the ease or difficulty likely to be encountered during excavations helps refine the project schedules guides the prospective contractors for rationalizing their bids and affords preparation of realistic cost estimates necessary for obtaining the financial approval. Various direct and indirect methods have been used by the engineers to figure out the relative excavatability of soils and rocks. These procedures include study of the geologic map close examination of drillhole logs for jointing/bedding details/RQD measurement of compression wave velocity using seismic refraction survey and direct excavation trials. The authors have attempted a cheap and quick procedure for estimating excavatability of limestone rocks for laying pipeline for a gas field project in Pakistan. This approach is based upon geologic/geomorphologic mapping limited drilling in-situ penetration testing using a pneumatic hammer recovery of rock cores compression testing of cores and a comparison between various observed / measured characteristics of various rocks to assess their relative as well as absolute rippability. The authors believe that such correlations may be developed for various materials whose excavatability is to be evaluated at the expense of minimum cost and time.

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Item Type:	Proceedings Paper
AGROVOC Term:	ROCK
AGROVOC Term:	SOIL
AGROVOC Term:	LIMESTONE
AGROVOC Term:	EVALUATION
AGROVOC Term:	TESTING
AGROVOC Term:	STRENGTH
AGROVOC Term:	TECHNOLOGY
AGROVOC Term:	PAKISTAN
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:27
URI:	http://webagris.upm.edu.my/id/eprint/16177

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