Comparison between plate jacking and large flat jack test results of rock mass deformation modulus

Kavur, Boris; Cvitanović, Nataša Štambuk; Hrženjak, Petar

doi:10.1016/j.ijrmms.2014.09.022

Cited by 20 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From both (2) and (7), wave motions in the elastic medium have different propagation velocity and vibration mode, which can be divided into two propagation forms: propagation in dilatational disturbance and propagation in rotational disturbance. Equation (2) describes that a dilatational disturbance could be transmitted through the body and the propagation velocity can be obtained by (2), which the value is √( + 2G)/ .…”

Section: Relationship Between Velocities Of Seismic Waves and Dynamicmentioning

confidence: 99%

“…Equation (2) describes that a dilatational disturbance could be transmitted through the body and the propagation velocity can be obtained by (2), which the value is √( + 2G)/ . The properties of rotational disturbance propagation are depicted by (7). By solving the equation, the velocity of the rotational disturbance propagation can be given and the value is√G/ .…”

Section: Relationship Between Velocities Of Seismic Waves and Dynamicmentioning

confidence: 99%

“…To obtain the parameters accurately, in situ testing was proposed by some scholars. However, there were still many problems because of the restrictions in complex operation, high costs and time-consuming [5][6][7]. To overcome the above shortcomings, many researchers have introduced ultrasonic wave test to estimate the mechanical 2 Mathematical Problems in Engineering parameters of rock mass [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Back Analysis and Calculation of Dynamic Mechanical Parameters of Rock Mass with Measured Blasting Vibration Signals

Yang

Gao

et al. 2018

Mathematical Problems in Engineering

View full text Add to dashboard Cite

How to obtain dynamic parameters of rock masses quickly and precisely is a popular and difficult problem, which plays a very important part in engineering design or construction. Currently, the methods used to obtain these parameters are in situ testing method, empirical formula, and so on. However, these methods have some shortcomings, such as large investment and long construction period, which cannot obtain the dynamic parameters precisely and quickly in the engineering scale. In this study, a new method of estimating the rock parameters based on the measured field blasting vibration signals is proposed according to theory of elastic stress wave. In addition, an improved method for S-wave identification used in engineering scale was proposed and then the numerical simulation is given to verify the feasibility. Comparison of the numerical identification results and theoretical results clearly show that the improved method is available in S-wave identification with errors less than 2%. By identifying the arrival times of P and S waves, the propagation velocities of P and S waves are calculated and the parameters of rock mass can be obtained at last. Through analyzing the measured field blasting vibration signals in Fengning pumped-storage power station, the dynamic elastic modulus of rock mass inversed by vibration signals is about 2.2∼2.9 times of its static elastic modulus, while the inversed dynamic Poisson's ratio is 0.9∼0.975 times of the static.

show abstract

Section: Relationship Between Velocities Of Seismic Waves and Dynamicmentioning

confidence: 99%

Section: Relationship Between Velocities Of Seismic Waves and Dynamicmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Back Analysis and Calculation of Dynamic Mechanical Parameters of Rock Mass with Measured Blasting Vibration Signals

Yang

Gao

et al. 2018

Mathematical Problems in Engineering

View full text Add to dashboard Cite

show abstract

“…Rock mass deformation modulus can be determined by in-situ tests, such as: plate loading, plate jacking (PJT), radial jacking, fl at jack, cable jack, and dilatometer (DLT) (Galera, Alvarez & Bieniawski, 2007;Isik, Doyuran & Ulusay, 2008;Kavur, Štambuk Cvitanović & Hrženjak, 2015). These tests are time-consuming, expensive, and diffi cult to conduct and the reliability of the results is sometimes questionable (Palmstrom & Singh, 2001;Hoek & Diederichs, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…These tests are time-consuming, expensive, and diffi cult to conduct and the reliability of the results is sometimes questionable (Palmstrom & Singh, 2001;Hoek & Diederichs, 2006). Besides, in-situ test results may be very different depending on the test method (Agharazi, Tannant & Derek Martin, 2012;Kavur et al, 2015). This means that relying on just one in-situ method is diffi cult.…”

Section: Introductionmentioning

confidence: 99%

Comparison between deformation modulus of rock mass measured by plate jacking and dilatometer tests

Rezaei

Ajalloeian

Ghafoori

2017

Przegląd Naukowy Inżynieria I Kształtowanie Środowiska

View full text Add to dashboard Cite

For determination of the in-situ deformation modulus of rock mass at Bakhtiari Dam site, located in south-west of Iran, plate jacking tests (PJT) and dilatometer tests (DLT) carried out during the geotechnical investigations. In this study, the results of PJTs and DLTs were compared. This comparison involves 89 vertical and horizontal PJTs and 83 DLTs carried out in 6 rock units of Sarvak formation. Although, both PJTs and DLTs in the Bakhtiari Dam site were performed in same geological and geotechnical conditions, but there are not sufficient side by side data to make a paired two samples correlation. Therefore, the mean of in-situ data was compared at each rock unit. Besides Mann–Whitney U tests were performed to compare in-situ test results. The comparison shows that the deformation modulus measured by both methods has no significant differences. However, in low quality rock masses the moduli measured by the use of DLTs were greater than the modulus measured by PJTs. Conversely, in high quality rock masses the results of PJTs were greater than DLT’s.

show abstract

Jacking Test

Munro¹

2017

Selective Neck Dissection for Oral Cancer

View full text Add to dashboard Cite

Comparison between plate jacking and large flat jack test results of rock mass deformation modulus

Cited by 20 publications

References 8 publications

Back Analysis and Calculation of Dynamic Mechanical Parameters of Rock Mass with Measured Blasting Vibration Signals

Back Analysis and Calculation of Dynamic Mechanical Parameters of Rock Mass with Measured Blasting Vibration Signals

Comparison between deformation modulus of rock mass measured by plate jacking and dilatometer tests

Jacking Test

Contact Info

Product

Resources

About