our products

D&Q Mining is a high-tech company integrating R&D, production and sales. It provides mature products and solutions such as crushers, sand making, milling equipment, mobile crushing stations, etc., for aggregate, mining and waste recycling.

machine foundation on behaviour of sand

Behaviour of machine foundations resting on saturated sand

Nov 01, 2018 This study aims to investigate the behaviours of machine foundations resting on sand granular tire rubber mixtures after saturation. Kerbala sand with two relative densities, 35% and 60%, and granular rubber of sizes 0.07 to 3 mm, resulting from hashing scrap tires into small pieces, were used. A harmonic vertical mode of vibration was applied using a mechanical oscillator fixed on a square

More

Iraqi Academic Scientific Journals IASJ

In this paper, a dynamic analysis of strip machine foundation is placed at the middle of the top surface of two-layer saturated sand with different states (i.e. loose, medium and dense), and vertical harmonic excitation is carried out with assessment of liquefaction potential and building up of

More

The influence of foundation stiffness on the behaviour of

The influence of foundation stiffness on the behaviour of surface strip foundations on sand. Login. Together, the footing and the underlying sand form a foundation system which can be classified in terms of relative stiffness. Centrifuge model tests were conducted on seven aluminium footings of various depths and hence stiffness, and one

More

(PDF) Foundations for Dynamic Loads ResearchGate

For a well-designed machine foundation, the vibration amplitudes are small and the soil behaviour may be idealised as elastic. Non-linearity in soil behaviour may play a significant role in some

More

(PDF) Dynamic Analysis Of Machine Foundation

Feb 21, 2014 Foundation parameters that influence the vibrations of a machine-foundation system are mainly (i) overall foundation size, (ii) depth of embedment, (iii) sizes of the foundation members like

More

Soil and Foundation Challenges Ground Improvement Techniques

The temporarily suspended sand-in-water mixture behaves as a liquid and any objects sink to a point where the weight of the object is equal to the weight of the sand-water liquid. Once the excitation stops and pore pressure dissipates, the sand becomes frictional again and the settlement stops. By then, the damage has been done.

More

Behaviour of jacked and driven piles in sandy soil

Compared with conventional driven piles, the behaviour of jacked piles in sand and/or sandy soil is poorly understood, mainly because of the lack of field experience and a high-quality load test database. In a few field studies on the behaviour of driven piles in sand (Lehane et al., 1993; Chow, 1995), jacking was used instead of dynamic driving

More

BEHAVIOUR OF LATERALLY LOADED PILES.

and theoretical behaviour of laterally loaded piles. Model concrete piles were driven into a uniformly prepared sand bed and were loaded to failure while observing the load deflection behaviour. Both linear and non-linear theoretical analyses were carried out to predict the model pile behaviour using the soil parameters observed by laboratory

More

Modeling Soil Behavior With SiMple SpringS, part 1

Modeling soil behavior with simple springs is a discrete approach to analysis that has been used for well over a century. A summary of foundation-soil interac-tion models developed by researchers who have used this discrete approach has been provided by Maheshwari (2011). Within the post-frame building com-munity, McGuire (1998) used a spring

More

FOUNDATIONS FOR VIBRATING MACHINES

The criteria for designing machine foundations shall be discussed first followed by the methods of analysis. Figure 1. Types of Machine Foundations (a) Block foundations. (b) Box or caisson foundations. (c) Complex foundations CRITERIA FOR DESIGN A machine foundation should meet the following conditions for satisfactory performance:

More

RESONANCE FREQUENCY OF MACHINE FOUNDATIONS

the machine foundation is medium or dense, thefrequency ratio at which liquefaction may occur is greater than 1.0. It can be noticed that the time of initial liquefaction decrease as the frequency of dynamic load increases. Keywords: Dynamic, finite elements, sand, liquefaction, machine foundation

More

Effect of mode of vibration on the response of machine

In this paper, the influence of the following parameters on different modes of vibration response of model footings on sand is studied: (vertical, rocking and pitching load amplitude and frequency). To achieve the objective of this study, the model footing was selected to be rectangular footing with an aspect ratio (L/B= 1.33) i.e (L= length and B= width). A physical model was manufactured to

More

Load-deformation behaviour of foundations under vertical

4.3.4 Poisson’s Ratio (ν) of Sand 64 Chapter 5: Estimating Shallow Foundation Behaviour using Numerical Models 66 5.1 General 66 5.2 Behaviour Criteria and Numerical Model Development 69 5.2.1 Shallow Foundation Failure Mechanism 69 5.2.2 Development of Shallow Foundation

More

Machine Foundation Vibration Analysis Methods

Machine Foundation is subjected to dynamic loads. These loads develop the vibratory motions which will transmit into the soil below the foundation. The effect on soil caused by these vibrations is analyzed using principles of soil dynamics and theory of vibrations. Contents:Types of Vibrations in Machine FoundationFree Vibration in Machine FoundationForced Vibration in Machine

More

VIBRATION ABSORPTION AND ISOLATION IN DYNAMICALLY

Machine foundations are known as dynamically loaded foundations built with reinforced concrete, in general. The design of a machine foundation is more complex than of a foundation which supports only static loads. In machine foundations, the designer must consider, in addition to the

More

Basics of Foundation Engineering with Solved Problems

the foundation spreads out with a vertical-to-horizontal slope of 2:1. Now, the values of (D 1 and D 2) can be calculated easily as will be seen later. Note: if the foundation is circular the value of (∆σ′) at depth (D) can be determined as following: ∆σ H ′ = P Area at depth (D) = P π v ×(B+D)2 P=the load applied on the foundation

More

(PDF) Dynamic Analysis Of Machine Foundation

Foundation parameters that influence the vibrations of a machine-foundation system are mainly (i) overall foundation size, (ii) depth of embedment, (iii) sizes of the foundation members like

More

AN EXPERIMENTAL INVESTIGATION ON BEHAVIOUR OF

4) Pile foundations are economical for the structures supporting vibrating machines such as turbines etc. to transmit their vibrations deep into the strata. 5) To compact the loose soil, the compaction piles are used to increase the bearing the capacity. 2.0 PROPERTIES OF SAND

More

BEHAVIOUR OF LATERALLY LOADED PILES.

and theoretical behaviour of laterally loaded piles. Model concrete piles were driven into a uniformly prepared sand bed and were loaded to failure while observing the load deflection behaviour. Both linear and non-linear theoretical analyses were carried out to predict the model pile behaviour using the soil parameters observed by laboratory

More

Behavior of cyclically loaded monopile foundations for

Apr 01, 2015 The geometry of the FE pile–soil model is selected by taking into account the future developments of the offshore wind industry. By the end of 2013, the majority of the operating wind turbines have a power output of up to 3.6 MW .Approximately two thirds of the installed wind turbines are based on monopile foundations, with a diameter ranging from 3.0 to 6.0 m .

More

CHAPTER 16

embedded in sand in the laboratory under controlled density conditions. Loos and Breth (1949) reported a few model tests in dry sand on vertical and batter piles. Model tests to determine the effect of batter on pile load capacity have been reported by Tschebotarioff (1953), Yoshimi (1964), and Awad and Petrasovits (1968).

More

Shear Strength of Sand: Characteristics and Factors Soil

ADVERTISEMENTS: In this article we will discuss about the characteristics and factors affecting the sheer strength of sand. Shear Strength Characteristics of Sand: Shear strength characteristics of sandy soils depend on the drainage conditions in addition to several other param­eters as discussed in the following subsections. 1. Shear Strength Characteristics of Saturated Sands during Drained

More

FOUNDATIONS FOR VIBRATING MACHINES

The criteria for designing machine foundations shall be discussed first followed by the methods of analysis. Figure 1. Types of Machine Foundations (a) Block foundations. (b) Box or caisson foundations. (c) Complex foundations CRITERIA FOR DESIGN A machine foundation should meet the following conditions for satisfactory performance:

More

The Mind's Machine: Foundations of Brain and Behavior

Watson (Simon Fraser U., Canada) and Breedlove (Michigan State U.) provide a textbook for a course introducing the elements of behavioral neuroscience, either for science students going into the area, or students in other disciplines who are just broadening their education. Among the topics are the anatomy of the nervous system, the chemistry of behavior, vision from eye to brain, biological

More

RESONANCE FREQUENCY OF MACHINE FOUNDATIONS

the machine foundation is medium or dense, thefrequency ratio at which liquefaction may occur is greater than 1.0. It can be noticed that the time of initial liquefaction decrease as the frequency of dynamic load increases. Keywords: Dynamic, finite elements, sand, liquefaction, machine foundation

More

Load-deformation behaviour of foundations under vertical

4.3.4 Poisson’s Ratio (ν) of Sand 64 Chapter 5: Estimating Shallow Foundation Behaviour using Numerical Models 66 5.1 General 66 5.2 Behaviour Criteria and Numerical Model Development 69 5.2.1 Shallow Foundation Failure Mechanism 69 5.2.2 Development of Shallow Foundation

More

Behaviour of jacked and driven piles in sandy soil

Compared with conventional driven piles, the behaviour of jacked piles in sand and/or sandy soil is poorly understood, mainly because of the lack of field experience and a high-quality load test database. In a few field studies on the behaviour of driven piles in sand (Lehane et al., 1993; Chow, 1995), jacking was used instead of dynamic driving

More

VIBRATION ABSORPTION AND ISOLATION IN DYNAMICALLY

Machine foundations are known as dynamically loaded foundations built with reinforced concrete, in general. The design of a machine foundation is more complex than of a foundation which supports only static loads. In machine foundations, the designer must consider, in addition to the

More

AN EXPERIMENTAL INVESTIGATION ON BEHAVIOUR OF

4) Pile foundations are economical for the structures supporting vibrating machines such as turbines etc. to transmit their vibrations deep into the strata. 5) To compact the loose soil, the compaction piles are used to increase the bearing the capacity. 2.0 PROPERTIES OF SAND

More

CHAPTER 16

embedded in sand in the laboratory under controlled density conditions. Loos and Breth (1949) reported a few model tests in dry sand on vertical and batter piles. Model tests to determine the effect of batter on pile load capacity have been reported by Tschebotarioff (1953), Yoshimi (1964), and Awad and Petrasovits (1968).

More

BEHAVIOUR OF LATERALLY LOADED PILES.

and theoretical behaviour of laterally loaded piles. Model concrete piles were driven into a uniformly prepared sand bed and were loaded to failure while observing the load deflection behaviour. Both linear and non-linear theoretical analyses were carried out to predict the model pile behaviour using the soil parameters observed by laboratory

More

Basics of Foundation Engineering with Solved Problems

the foundation spreads out with a vertical-to-horizontal slope of 2:1. Now, the values of (D 1 and D 2) can be calculated easily as will be seen later. Note: if the foundation is circular the value of (∆σ′) at depth (D) can be determined as following: ∆σ H ′ = P Area at depth (D) = P π v ×(B+D)2 P=the load applied on the foundation

More

Design of dynamically loaded foundations for pumps and

determined in designing a machine foundation, in addition to the natural frequency of a machine foundation soil system. [3] Guidelines for the designing of foundations will be presented. 1.1 Types of machines When designing foundations for machinery and equipment, the primary issue is the need to take into account the calculations of dynamic loads.

More

Shear Strength of Sand: Characteristics and Factors Soil

ADVERTISEMENTS: In this article we will discuss about the characteristics and factors affecting the sheer strength of sand. Shear Strength Characteristics of Sand: Shear strength characteristics of sandy soils depend on the drainage conditions in addition to several other param­eters as discussed in the following subsections. 1. Shear Strength Characteristics of Saturated Sands during Drained

More

Deformation behaviour of geotextile reinforced sand slopes

Internal mechanisms of failure of geotextile reinforced slopes are particularly due to: (i) rupture of reinforcement layers and (ii) pull-out of geotextile layers. This paper concerns about the study of deformation behaviour of geotextile reinforced slopes resting on a firm foundation layer. Centrif

More

EXPERIMENTAL INVESTIGATION OF DYNAMIC BEHAVIOR

Dynamic loads, Grid-anchor, Embedded pipe, Settlement, Shallow foundation, Reinforced sand. Received: 21 October 2015/ Revised: 21 April 2016/ Accepted: 15 June 2016/ Published: 13 August 2016 1.

More

Behavior of a Structured Piled Beam–Slab Foundation for a

Mar 03, 2021 With wind farm development, a new type of foundation, the piled beam–slab foundation, was invented to support wind turbines on land. Although this foundation enables a lower-cost investment, its structure is complex. Wind turbine foundations are usually subject to combined vertical, horizontal, and moment loads.

More

FOUNDATIONS FOR VIBRATING MACHINES

The criteria for designing machine foundations shall be discussed first followed by the methods of analysis. Figure 1. Types of Machine Foundations (a) Block foundations. (b) Box or caisson foundations. (c) Complex foundations CRITERIA FOR DESIGN A machine foundation should meet the following conditions for satisfactory performance:

More