IS 12955 : Part 1 : 1990 Code of practice for in-situ determination of rock mass deformability using a flexible dilatometer Part 1 volume change

1 Scope

1.1 This standard covers the method for determination ofdeformation modulus of rock in-situ using an expanding probe(dilatometer) to exert pressure on the walls of a drillhole. Theresulting diametral hole expansion (dilation) is determined frommeasurements of the volumetric expansion of the probe.Deformability characteristics of the rock mass at the dilatometerlocation may be calculated from the relation between pressure anddilation.

2 References

List of Referred Indian Standards

IS 11315 : Part 1 :1987 Method for the quantitativedescription ofdiscontinuities in rock mass:Part 1 Orientation

IS 11315 : Part 2 :1987 Method for the quantitativedescription ofdiscontinuities in rock mass:Part 2 Spacing

IS 11315 : Part 3 :1987 Method for the quantitativedescription ofdiscontinuities in rock mass:Part 3 Persistence

IS 11315 : Part 4 :1987 Method for the quantitativedescription ofdiscontinuities in rock mass:Part 4 Roughness

IS 11315 : Part 5 :1987 Method for the quantitativedescription ofdiscontinuities in rock mass:Part 5 Wall strength

IS 11315 : Part 6 :1987 Method for the quantitativedescription ofdiscontinuities in rock mass:Part 6 Aperture

IS 11315 : Part 7 :1987 Method for the quantitativedescription ofdiscontinuities in rock mass:Part 7 Filling

IS 11315 : Part 8 :1987 Method for the quantitativedescription ofdiscontinuities in rock mass:Part 8 Seepage

IS 11315 : Part 9 :1987 Method for the quantitativedescription ofdiscontinuities in rock mass:Part 9 Number of sets

IS 11315 : Part 10 :1987 Method for the quantitative description ofdiscontinuities in rock mass: Part 10 Block size

IS 11315 : Part 11 :1985 Method for the quantitative description ofdiscontinuities in rock mass:Part 11 Core recovery and rock quality