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7.9 Design Guidelines – Rock Riprap 7.9.1 Rock Riprap

7.9.5 Design Relationship A riprap design relationship that is based on tractive force theory yet has velocity as its primary design parameter is presented in Equation 7.36. The design relationship in Equation 7.36 is based on the assumption of uniform, gradually varying flow. Figure 7-25.1 presents a graphical solution to Equation 7.36.

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CHAPTER 9.0 INTERPRETATION OF SOIL PROPERTIES

9.2.3. Soil Classification by Cone Penetration Testing The cone penetrometer provides indirect assessments of soil classification type (in the classical sense) by measuring the response during full-displacement. Duri ng a cone penetration test (CPT), the continuously-

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LOOSE RIPRAP PROTECTION - USDA

Figure 7-1. Measurement of P1 and P2 on Blocky rock Figure 7-2. Measurement of P1 and P2 on Spherical rock Figure 7-3. Rock Weight and Size vs. (P1+P2) Figure 7-4. Volume of a Cone for Approximate Volume of Small Rock when Checking Gradation Figure 7-5. "Key" Rocks for Checking Riprap Gradation Figure 7-6.

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Guidelines for Estimation of Shear Wave Velocity Profiles

parameters on VS. Gmax can be measured in the laboratory using a resonant column device or bender elements. While the void ratio and stress conditions can be recreated in a reconstituted specimen, other factors—such as soil fabric and cementation—cannot [Kramer 1996]. Laboratory testing requires very high-quality, undisturbed samples.

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Rocket Nozzle Geometries - gatech.edu

Conical Nozzles –Design Tradeoff • Shorter length but lower thrust for higher cone-angle –tradeoff between size/mass and I sp mu e e p a A e tan 1 cos 1 1 1 t t R R R 0 L 20 40 60 80 0 10 20 30 Half-angle ( ) R t 0.92 0.94 0.96 0.98 1 L/R t ( =50) 2 1 cos for spherical expansion 15 Nozzle Geometries - 12

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Correlation of Texas Cone Penetrometer Test Values and ...

Sep 01, 2004· Penetration Test (SPT) and Cone Penetration Test (CPT) used to determine the in situ soil parameters for foundation design. In the case of the TCP test, the potential energy resulting from the hammer impact is similar to the SPT test. The cone shape and apex angle of the TCP are similar to the CPT but the diameter is larger. Therefore, it can be

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Calculation method to Design Hoppers and Silos - Hopper ...

The design of the silo has as an objective to find the couple cone angle + diameter of outlet that will manage to keep a constraint on the powder high enough to break arches and make the product flow naturally. The diameter ... Silo design parameters. Key silo design parameters; Discharge diameter (avoids arching and ratholing) The discharge angle:

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Nozzle Design - Rocket Propulsion

Nozzle Design by R.A. O'Leary and J. E. Beck, Spring 1992 Superior nozzle design is the culmination of carefully determined mission needs, established physics parameters and hard-earned experience. Pratt & Whitney Rocketdyne's (now Rocketdyne Propulsion and Power, a part of The Pratt & ... where a is the cone half-angle. A 15° half-angle ...

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Engineering Geology Field Manual - Volume II - 2nd Ed ...

geotechnical design data in the United States. An estimated 80-90 percent of geotechnical investigations consist of SPTs. Standard Penetration Testing Equipment and Procedures The SPT consists of driving a 2-inch (5-cm) outside diameter (OD) "split barrel" sampler (figure 22-1) at the bottom of an open borehole with a 140-pound (63.6-kg)

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US20040230413A1 - Roller cone bit design using multi ...

US20040230413A1 US10/772,153 US77215304A US2004230413A1 US 20040230413 A1 US20040230413 A1 US 20040230413A1 US 77215304 A US77215304 A US 77215304A US 2004230413 A1 US2004230413 A1 US 2004230413A1 Authority US United States Prior art keywords bit objectives cone tooth consist Prior art date Legal status (The legal …

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Rock engineering design of post-tensioned anchors for dams ...

Feb 01, 2015· For a general cone angle of θ c (θ c = 60° or 90° in Fig. 5) and the apex of the cone located at the mid-point of the grouted embedment length, the uplift force required to overcome the weight of the cone of rock, W c, may be calculated as (6) Q ru = 1 3 π γ tan 2 θ c 2 (D + L 2) 3 where γ is the unit weight of the rock, D is the depth ...

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Performance and Design

2. Individual design chapters which address topics such as: pile design, shear strength estimation, settlement calculation and compaction control. 3. Appendices which present previously published, pertinent information on cone penetrometer testing. 17. K,y Wards Cone Penetration, Foundation, Dutch Cone, Soil Mechanics lB. Distribution Statement ...

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Empirical correlation between undrained shear strength …

Cone angle constant, FC [-] 0 ... To understand and interpret the properties and behavior of soil and rock are of great importance ... The determination of design parameters from soil data is crucial and influences the technical solutions and thereby the costs

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Surface mining planning and design of open pit mining

Jan 09, 2016· Hassan Z. Harraz [email protected] 2015- 2016 Prof. Dr. H.Z. Harraz Presentation Topic 6: Mining Methods Part II: Surface Mining-Planning and Design of Open Pit Mining. 2. Outline of Topic 6: 1) Definition of Open pit Mining Parameters: 1.1.) Basic Concept 1.2) Open pit Mining method 1.3) Bench 1.4) Open Pit Bench Terminology 1.5) Bench ...

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Stress – Strain Relationships

OPTI 222 Mechanical Design in Optical Engineering 21 σ U ⇒ Ultimate Strength - The maximum stress the material can withstand (based on the original area). Material Properties E ⇒ Modulus of Elasticity - Slope of the initial linear portion of the stress-strain diagram. The modulus of elasticity may also be characterized as the "stiffness" or

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Experimental analysis and parameter optimization of pdc ...

The design parameters of PDC bits for rock drilling trolley have not been studied in depth and it is lack of theoretical research basis. So the service life of the bits for tunnel tunneling construction cannot meet the design and application requirements. Taking three-arm rock drilling trolley as the experimental platform, the key parameters of PDC bit crown profile shape, caster angle ...

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Mohr-Coulomb Model

friction angle. This is valuable for design because most often, the peak friction angle is used to define the strength of the soil in foundation calculations. Practical application Iteration to estimate peak friction angle from stress state and void ratio The mean effective stress (in situ) was used to calculate the average

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CHAPTER 3 SOILS

provides guidance on how to use this information to determine parameters necessary for the design or verification of a shoring system. 3.1 SOIL IDENTIFICATION, CLASSIFICATION, DESCRIPTION AND ... Empirical relationships to approximate the soil friction angle (φ) and . density are shown in Table 3-1. Table 3-1. ... The Cone Penetration Test ...

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Rock Slopes - MnDOT

optimum "safe" cut slope angle together with an appropriate rock fall catchment area. Figure 1illustrates the terms used in a Rock Slope design. Th e cut slope is often referred to as a "cut slope angle", but at MnDOT it is expressed as a slope, vertical to horizontal (for example 2V:1H). The rock catchment areaincludes the flat ditch area

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Chapter 10 Soil Cut Design - Washington State Department ...

cone penetration test (CPT) is not often used for routine exploration of cut slopes. However, the CPT provides continuous data on the stratigraphic profile and can be used to evaluate in situ strength parameters in very soft to medium stiff cohesive soil and very loose to medium dense sands. 10 .1 .3 .3. Groundwater Measurement

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DESIGN OF CYCLONE AND STUDY OF ITS PERFORMANCE …

Section Angle", Thermal Engineering (RETERM). 2. Bernardo S, Mori M and W P Martignoni (2006), "Evaluation of Cyclone Geometry and its Influence on its Performance Parameters by CFD", Powder Tech-nology. 3. Boysan F, Ayers W H and Swithenbank J A (1982), "Fundamental Mathematical Modeling Approach to Cyclone Design", Institute of ...

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Optimization Design and Application of Underground ...

According to the initial design scheme, parameters of bifurcation pipe size model were confirmed. Structure type is shown in Figure 3. Parameters which can be used as optimization design parameters are half angle of main cone and branch cone, bifurcation angle, main cone wall thickness, and branch cone wall thickness (see Figure 4).

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Design Methods - University of Waterloo

δis the shaft soil friction angle. 8 Shaft Capacity in Sand (Beta Method) Shaft Capacity in Sand (Beta Method) 9 ... Piles to Rock a, b reduction factors (Williams & Pells 1981) 18 Piles to Rock End Bearing Parameters Uplift Capacity. 19 Uplift Capacity SAND Uplift Capacity SAND

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Review of Post-Peak Parameters and Behaviour of Rock ...

failure. Hence knowledge of the failed or post-peak rock mass parameters is quite important in the design of support for underground openings. In the two-dimensional elasto-plastic finite element program, Phase2, users can currently define both elastic and plastic (i.e., peak and residual) rock mass properties. When an element

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Parametric sensitivity analysis of ground uplift above ...

May 15, 2012· The rigid cone model assumes an overburden rock mass above caverns to be a cone shape. According to Littlejohn and Bruce (1975), the cone angle (α) is taken as 30° or 45°. Except for the cone angle, the model does not account for any rock mass strength, so that the rigid-cone concept is very simplistic relative to a real rock mass response.

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Relationship Between DCP, Stiffness, Shear Strength and R ...

Use of the Dynamic Cone Penetrometer for maintenance, rehabilitation and reconstruction site evaluation ... experimental design should be followed, which considers a wide variety of soil properties, soil moistures, ... to strength and stiffness parameters, discusses considerations for the development of an equation to predict ...

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Introduction to Cone Penetration Testing

Basic Cone Parameters Sleeve Friction fs = load/ 2 rh Pore Pressure, u2 Tip Resistance qc = load/ r 2 Robertson, 2015 UD tube ... • Cone apex angle : 60 deg. • Diameter : 35.7 mm for 10 cm2 (43.7mm for 15 cm2) ... Soft Rock Very stiff soil – soft rock Newport Beach, CA, USA Stiff Silt Weak Sandstone/Siltstone

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In situ testing

2. to determine parameters which are required for engineering design calculations. Some soils, for example clays, may readily be sampled. If good-quality samples can be obtained, then laboratory testing offers the best method of determining soil and rock parameters under carefully controlled conditions.

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STRENGTH PROPERTIES OF ROCKS AND ROCK MASSES 1 ...

what is the rock mass strength. Knowledge of roc k mass strength is also important in the design of support systems as discussed in the next set of notes with regard to the concept of rock-support interaction. In general, rock mass strength depends on the strength of intact rock and the strength of rock discontinuities.

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Chapter 8 Foundation Design

The overall process for geotechnical design is addressed in Chapters 1 and 23. For design of structure foundations, the overall WSDOT design process, including both the geotechnical and structural design functions, is as illustrated in Figure 8-1. WSDOT Geotechnical Design Manual M 46-03.09 Page 8-1 December 2013

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Dominant Cutting Parameters Affecting the Specific Energy ...

May 31, 2018· Specific energy is one of the most significant parameters in the process of rock cutting and it has been widely used for evaluating the performance of excavation machines. In this paper, based on rock cutting tests that were conducted on a linear cutting machine (LCM), the effects of relevant cutting parameters and characteristics, including the clearance angle, the …

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Estimation of Engineering Properties of Soils from Field ...

Oct 18, 2016· For design of foundation, engineering properties like strength and deformability characteristics of soils are very important parameters. Soil properties like cohesion, angle of friction, shear wave velocity, Poisson's ratio etc. are important for evaluation of the vibration parameter by numerical modeling of soil. In various numerical modeling software manuals, …

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PUBLICATION 293 GEOTECHNICAL ENGINEERING …

5.1.2.3 Selecting Soil and Rock Parameters and Performing Analyses/Design Once the field and laboratory test results/data are reviewed and summarized on the subsurface profile(s), the soil and rock parameters can be selected. Geotechnical parameters of soil and rock can be determined in several ways, including: using in-situ field testing during

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