Home >> the point load test for weak rock in dredging appliions


the point load test for weak rock in dredging appliions

[PDF] USING THE POINT LOAD TEST TO DETERMINE THE …

Point load testing is used to determine rock strength indexes in geotechnical practice. The point load test apparatus and procedure enables economical testing of core or lump rock samples in either a field or laboratory setting. In order to estimate uniaxial compressive strength, index-to-strength conversion factors are used. These factors have been proposed by various researchers and are ...

RELATION BETWEEN UNIAXIAL COMPRESSIVE STRENGTH, …

Pakistan Journal of Science (Vol. 66 No. 1 March, 2014) 60 RELATION BETWEEN UNIAXIAL COMPRESSIVE STRENGTH, POINT LOAD INDEX AND SONIC WAVE VELOCITY FOR DOLERITE

The effect of rock classes on the relation ... - SpringerLink

Hassani FP, Scoble MJ, Whittaker BN (1980) Application of point load index test to strength determination of rock and proposals for new size-correction chart. In: Summers DA (ed) Proceedings of the 21st US symposium on rock mechanics. University of Missouri Press, Rolla, …

Evaluation of the Point Load Test for Rock

A commercially available point load test apparatus was purchased and used in a testing program on NX cores from the major types of sedimentary rock found in Missouri. Point load testing was performed in both axial and diametral orientations with unconfined compression tests performed for correlation.

Where is used the uniaxial compressive strength?

Where is used the uniaxial compressive strength? ... Point Load Test on Meta-Sedimentary Rocks and Correlation to UCS and BTS” by Diyuan Li and Lous Ngai Yuen Wong, Rock Mechanics and Rock ...

LABORATORY TESTS FOR DETERMINING STRENGTH OF ROCKS

Following are common laboratory tests for determining strength of rocks: Unconfined compression tests for rocks Triaxial compression test for rocks Splitting tension test for rocks Beam bending test for rocks Ring shear test for rocks This test is similar to that used for soils. Here also ...

Schmidt's Hammer Rebound Value Analysis for finding ...

 · Schmidt's Hammer Rebound Value Analysis for finding Uniaxial Compressive Strength, Point Load Index & density of Rocks 1. Minor Project Presentation 2. Introduction Hardness is known to be one of the physical properties of materials.

Rock mass properties

altered rock R0 Extremely weak 0.25 - 1 ** Indented by thumbnail Stiff fault gouge * Grade according to Brown (1981). ** Point load tests on rocks with a uniaxial compressive strength below 25 MPa are likely to yield highly ambiguous results. Table 3: Values of the constant m i for intact rock, by rock …

THE UNIAXIAL COMPRESSIVE STRENGTH OF SOFT ROCK

uniaxial compression test for soft rock is often replaced by a point load strength index test. This test is simpler in procedures than that of the uniaxial compression test, and the test does not need necessarily cylindrical samples. A conversion factor is then applied to the point load strength index, I S(50), for estimating the uniaxial ...

(PDF) Dredging Rock | Peter Verhoef

The geological and rock engineering aspects of the dredging of rock bymechanicical and gydraulic dredging methods are outlined . ... the bottom left plots the weak and strongly fissured (UCS). From practice it is known that the upper boundary for rock. ... Newsletter Nowadays often only a few UCS or Point Load test results are available in ...

Trench dredging in shallow water - YouTube

 · Trench dredging in shallow water ... to position a vessel or pontoon with a 4 point mooring system in combination with a multibeam echosounder system to monitor the pre-, actual and post dredging ...

Point Load Test on Meta-Sedimentary Rocks and Correlation ...

 · Hardy JS (1997) The point load test for weak rock in dredging applications. Int J Rock Mech Min Sci 34(3–4):295.e1–e13. doi: 10.1016/s 1609(97) 4 Google Scholar Heidari M, Khanlari G, Torabi Kaveh M, Kargarian S (2012) Predicting the uniaxial compressive and tensile strengths of gypsum rock by point load testing.

ASTM International - BOS Volume 04.08 Soil and Rock (I ...

D 16 Standard Test Method for Determination of the Point Load Strength Index of Rock and Application to Rock Strength Classifications. D5737/D5737M Standard Guide for Methods for Measuring Well Discharge. D 05(2010) Standard Guide for Planning and Conducting Borehole Geophysical Logging

Rock Slope Engineering - civil engineering | I am Menglim ...

Rock Slope Engineering Civil and mining 4th edition Duncan C. Wyllie and ... 4.8 Example Problem 4.2: analysis of point load test results 107 5 Ground water 109 5.1 Introduction 109 5.2 The hydrologic cycle 110 ... 9.4.7 Application of external forces to toppling slopes 213.

A Validation Study for the Estimation of Uniaxial ...

Uniaxial compressive strength (UCS) is one of the crucial parameters controlling the strength of rock masses (Hu et al. 2012).A reliable and direct measurement of this parameter in the laboratory requires well-prepared samples and certified testing apparatus (Heidari et al. 2012).As an indirect method, index tests have been widely used to estimate the UCS of rock, especially in the field.

Empirical methods to predict the abrasion resistance of ...

 · Empirical methods to predict the abrasion resistance of rock aggregates Empirical methods to predict the abrasion resistance of rock aggregates Kahraman, Sair; Gunaydin, Osman 24 00:00:00 The possibility of predicting the Los Angeles (L.A.) abrasion loss from the Schmidt hammer, point load and porosity tests was investigated using 9 igneous, 11 metamorphic and 15 sedimentary rocks …

Subcommittee D18.12 on Rock Mechanics - ASTM International

D 16 Standard Test Method for Slake Durability of Shales and Other Similar Weak Rocks. D 19 Standard Test Method for In Situ Stress and Modulus of Deformation Using the Flat Jack Method. ... D 16 Standard Test Method for Determination of the Point Load Strength Index of Rock and Application to Rock Strength Classifications.

Determination of Some Engineering Properties of Weak Rocks ...

An attempt has been made at Banaras Hindu University to evolve techniques of testing various rock indices e.g. Rock Quality Designation (RQD),Shore Hardness, Protodyakonov Index, Impact Strength Index, Point Load Index etc. and to coorelate them with the usual compressive strengths determined by testing regular specimens.

The point load test for weak rock in dredging applications ...

Read "The point load test for weak rock in dredging applications, International Journal of Rock Mechanics and Mining Sciences" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

Lecture 9 – Introduction to Rock Strength David Hart ...

that rock strength is affected by the SIZE of the specimen tested. This can be explained simply as being the result of the many flaws found in rock in the form of fissures, pores, cleavage, bedding planes, foliation, etc. The larger the size of the specimen tested the higher the probability that a weak flaw will be available, capable of ...

USING THE POINT LOAD TEST TO DETERMINE THE …

The point load test (PLT) is an accepted rock mechanics testing procedure used for the calculation of a rock strength index. This index can be used to estimate other rock strength parameters. The focus of this paper is to present the data analysis used to correlate the point load test index (Is50) with

Rockbolts and cables

vibrations due to nearby blasting or when anchored in weak rock. Consequently, for applications where it is essential that the support load be maintained, the use of resin anchors should be considered. A typical resin product is made up of two component cartridges containing a resin and a catalyst in separate compartments, as shown in Figure 3.

Correlation between the point load index (Is(50)) and the ...

3.2 POINT LOAD TEST (PLT) The Point Load Test is also known as the Franklin test. The first reference is by Reichmuth, D. (1968) [10], who proposed obtaining the resistance to a point load and a determination of the unconfined compression strength via correlation, regardless of whether they are irregular, regular, or cylindrical rock controls [11].

(PDF) Correlation between uniaxial strength and point load ...

In this research correlation between the results of point load test and uniaxial compressive test are presented for rock samples from three sites in Iran. Two rock types including Shale and ...

STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1 ...

Broch and Franklin (1972) proposed a testing method called the Point Load Test. The test consists of squeezing pieces of rock diametrically between two hardened steel cones. The test set-up is shown in Figure 1. For these tests, rock pieces must have a length at least 1.4 times their diameter (Figure 2a). The point load index, Id, is equal to

Dump Scow in action - YouTube

 · Part of the dredging of the Port of Miami. A 3000 yard dump scow opening to dump its load of sand/rock during the building of the Julia Tuttle Manatee Habitat. ... Dump Scow in action …

How can we get the bearing capacity of rock and soil?

How can we get the bearing capacity of rock and soil? ... or by performing some field test such as Standard penetration test or Plate load test etc. ... to know application of this parameter in ...

Technical Service Center | Bureau of Reclamation

Rock Manual. The Rock Manual provides common technical information on properties of rocks, field and laboratory investigations, and testing of rocks used as foundations and materials for dams, tunnels, canals, and many other types of structures built for Reclamation. The Rock Manual consists of two parts: Part 1, still to be developed, will include chapters on the properties of rocks and ...

Rock mass properties

altered rock R0 Extremely weak 0.25 - 1 ** Indented by thumbnail Stiff fault gouge * Grade according to Brown (1981). ** Point load tests on rocks with a uniaxial compressive strength below 25 MPa are likely to yield highly ambiguous results. Table 3: Values of the constant m i for intact rock, by rock …

A study on rock mass classifications and tunnel support ...

Request PDF on ResearchGate | A study on rock mass classifications and tunnel support systems in unconsolidated sedimentary rock | This paper presents new valuable field data and a comprehensive ...

Site investigation and rock mass characterization ...

Site investigation and rock mass characterization. From QueensMineDesignWiki. Jump to ... Laboratory tests can correctly estimate intact strength through point load test on rock core ... Therefore one must use caution when applying this system to weak rocks with few or no joints and should consider using other methods in addition to the Q ...

Point-Load Test | Mining | SGS

Rock specimens in the form of core (diametral and axial tests), cut blocks (block test), or irregular lumps (irregular lump test) are broken by application of a concentrated load through a pair of spherically truncated, conical platens. The required testing apparatus is light …