A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Using Indirect Testing Methods to Quickly Acquire the Rock Strength and Rock Mass Classification in Tunnel Engineering
Uniaxial compressive strength (UCS) and tensile strength are essential parameters of rocks, but the direct measurement of these two parameters is time-consuming and requires high-quality samples. As such, academics brought attention to the indirect tests (such as point load test, ultrasonic wave velocity test, and Schmidt hammer test) that could be used to estimate UCS and tensile strength quickly. The empirical equations for estimating UCS and tensile strength of rocks in study cases remain poorly understood as previous equations based on indirect testing methods possess a lithological heterogeneity–dependent nature. Laboratory experiments (e.g., uniaxial compressive test, Brazilian test, point load test) and regression analysis were performed to acquire the correlation equations for calculating UCS or tensile strength of rocks based on indirect tests. Significant linear equations were derived and UCS or tensile strength can be estimated by point load test with acceptable discrepancy. The comparison study showed that using improper empirical equations to predict UCS and tensile strength can yield significant errors. A modified basic quality (BQ) rock mass classification system was also presented to conveniently classify the rock mass in study cases.
Using Indirect Testing Methods to Quickly Acquire the Rock Strength and Rock Mass Classification in Tunnel Engineering
Uniaxial compressive strength (UCS) and tensile strength are essential parameters of rocks, but the direct measurement of these two parameters is time-consuming and requires high-quality samples. As such, academics brought attention to the indirect tests (such as point load test, ultrasonic wave velocity test, and Schmidt hammer test) that could be used to estimate UCS and tensile strength quickly. The empirical equations for estimating UCS and tensile strength of rocks in study cases remain poorly understood as previous equations based on indirect testing methods possess a lithological heterogeneity–dependent nature. Laboratory experiments (e.g., uniaxial compressive test, Brazilian test, point load test) and regression analysis were performed to acquire the correlation equations for calculating UCS or tensile strength of rocks based on indirect tests. Significant linear equations were derived and UCS or tensile strength can be estimated by point load test with acceptable discrepancy. The comparison study showed that using improper empirical equations to predict UCS and tensile strength can yield significant errors. A modified basic quality (BQ) rock mass classification system was also presented to conveniently classify the rock mass in study cases.
Using Indirect Testing Methods to Quickly Acquire the Rock Strength and Rock Mass Classification in Tunnel Engineering
Xue, Yiguo (author) / Kong, Fanmeng (author) / Li, Shucai (author) / Zhang, Lewen (author) / Zhou, Binghua (author) / Li, Guangkun (author) / Gong, Huimin (author)
2020-03-16
Article (Journal)
Electronic Resource
Unknown
Automated tunnel rock classification using rock engineering systems
| Elsevier | 2013
Automated tunnel rock classification using rock engineering systems
| British Library Online Contents | 2013
Automated tunnel rock classification using rock engineering systems
| Online Contents | 2013
Rock mass modeling in tunneling versus rock mass classification using rating methods
| British Library Conference Proceedings | 1999
Correlation of rock mass classification methods in Korean rock mass
| British Library Conference Proceedings | 2001