Tuesday, June 7, 2011

CrazyEngineers Forum

CrazyEngineers Forum

Earth Works ( Soil test - Shoring ,Excavation,Filling ,compacting -.. by picture )

Posted: 07 Jun 2011 02:08 PM PDT

Earth Work
-Soil test
-Shoring and Dewatering
-Excavation,Filling and compacting
-Surveying works / grading work / Fix site corners
-Termite Control
-Soil Test
Alot of information result from Soil test so soil test report help us to know:
Type of soil which help us to choice suitable footing type.
Allowable Bearing Capacity which help us to design footings.
Ground Water level : Which help us to decide if we must use dewatering or not.



Soil Test

Soil Test Report


Shoring and Dewatering

Dewatering (pronounced de-water-ing) is the removal of water from solid material or soil by wet classification, centrifugation, filtration, or similar solid-liquid separation processes, such as removal of residual liquid from a filter cake by a filter press as part of various industrial processes.
Construction dewatering, unwatering, or water control are common terms used to describe removal or draining groundwater or surface water from a riverbed, construction site, caisson, or mine shaft, by pumping or evaporation. On a construction site, this dewatering may be implemented before subsurface excavation for foundations, shoring, or cellar space to lower the water table. This frequently involves the use of submersible "dewatering" pumps, centrifugal ("trash") pumps, eductors, or application of vacuum to well points.

The Contractor shall submit for approval his proposed design and detailed layout for the dewatering system or systems he intends to install. The proposed system(s) shall be designed to ensure the following:
1- The lowering of the water table over the site to allow excavation to proceed and maintaining the water level below the base of excavation as it proceeds (draw down period).
2- The reduction of piezometric levels in the underlying strata sufficiently during the draw down stage to ensure stability of the excavation.
3- Once excavation is complete the water level in the ground must be maintained, during the construction period, at least 0.50 meter below the deepest excavation level until the Engineer decides that dewatering may be stopped.
4- Restoring the water level to its initial position shall be made after the space between the face of the excavation and the basement wall is backfilled and once the weight of the structure exceeds the hydrostatic uplift. In any event, the decision as to when dewatering operations shall cease or be reduced shall be exclusively that of the Engineer.
5- That "heave" of the excavation base due to upward groundwater pressure does not occur.
6- The System(s) must run twenty-four (24) hours a day and the design shall include sufficient standby pumps connected in the system(s) so as to operate automatically in case of pump failure.

DEWATERING EQUIPMENT AND MONITORING PIEZOMETERS
Provide all necessary perimeter trenches, pipes, pumps, etc., as required for the purpose of collecting and disposing of all excess water inflow into the bottom of excavations.
Provide and maintain minimum one temporary piezometer for monitoring the water table levels on site on a daily basis during the draw down and construction phases. The location and design of the temporary piezometer shall be approved by the Engineer.
Dewatering must continue until
a) All foundation work and damp proofing has been carried out to the satisfaction of the Engineer.
b) Adequate compensation of uplift forces, increased by a suitable factor of safety has been attained.






Shoring is a general term used in construction to describe the process of supporting a structure in order to prevent collapse so that construction can proceed. The phrase can also be used as a noun to refer to the materials used in the process.
Buildings- It is used to support the beams and floors in a building while a column or wall is removed. In this situation vertical supports are used as a temporary replacement for the building columns or walls.
Trenches - During excavation, shoring systems provide safety for workers in a trench and speed excavation. In this case, shoring should not be confused with shielding. Shoring is designed to prevent collapse where shielding is only designed to protect workers when collapses occur. Concrete structures shoring, in this case also referred to as falsework, provides temporary support until the concrete becomes hard and achieves the desired strength to support loads.
.
METHOD OF SHORING
Vertical face support systems are to be designed to withstand all soil, water and surcharge pressures however arising without undue deflection or other evidence of distress. Where roads, services or other installations lie within a distance from the temporary support equal to the depth of the excavation, ground movements are to be monitored and limited to amounts agreed with the appropriate authorities.

MATERIALS
A. Structural steel used for shoring and lateral-bracing systems shall be designed in accordance with American Institute of steel Construction AISC (ASD) 89 Ninth Edition – Code of Practice for the Structural Use of Steelwork in Building.
B. Timber used for shoring and lateral bracing system shall be in accordance with BS 5268 or Code of Practice for the Structural Use of Timber.
C. Concrete used for lateral bracing system shall be in accordance with 'Building Code Requirements for Reinforced Concrete' (ACI 318-99), American Concrete Institute.
D. Tie back tendons if required shall consist of either high strength bars or groups of wire strand cables; the sizes and capacities to be proposed by the Contractor.
E. Cement grout materials and admixtures for tieback anchorage shall be proposed by the Contractor for approval of the Engineer.




Machine to fix steel supports (coring )



Resource
GROOK.net | Empowerment Through Knowledge

Apache Virtual Hosts – Introduction and What is it?

Posted: 07 Jun 2011 10:05 AM PDT

During my first ever Web Development using Personal Web Server, I used to think of how to host different websites on my single Windows 98 SE system. I used to wonder, if only I get a new system, I can run virtual machines and host different sites. Friends, this is not a technical document, so don’t expect any installation instructions or guide here.

This is my own experience. Do comment and read more @ Apache Virtual Hosts – Introduction and What is it?

scalable waste-energy recycling engine - the WHE

Posted: 07 Jun 2011 08:50 AM PDT

Novel waste-energy recycling engine receives key patent

• Designfax, Tech for OEM Design Engineers

How to blend two surfaces in CATIA

Posted: 07 Jun 2011 08:47 AM PDT

Friends,
Please go through the video below. This is what we intend to do today.

I need to do a mini project

Posted: 07 Jun 2011 07:31 AM PDT

Give me project names related to embedded systems with .net as preference

Spell Check Plugin For Windows Live Writer - After The Deadline

Posted: 07 Jun 2011 06:43 AM PDT

AfterTheDeadline is a nice web-service for checking out your grammatical errors while typing. The service not only checks for your spelling mistakes, but also checks the usage of words contextually. That is a normal spell checker will not report any error in 'lose' and 'loose', but these words are used in entirely different context.

You can now add spell checking capability to your Windows Live Desktop blogging client by adding this plugin: Grammar and Spell Checking Plugin for Windows Live Writer - Home

Share your reviews and experience with this plugin through comments.

Pirates of the Carribean 3

Posted: 07 Jun 2011 06:43 AM PDT

comparing al of them so far, wat do you think/ which is the best?

need expert advise..

Posted: 07 Jun 2011 06:38 AM PDT

HELLOOO!!!

I want to hook up a 40 inch tv to a desktop. What do i need to consider in the performance of the desktop??? do i need to have crazy graphic cards? crazy ram? crazy memory crazy mother board??? i'm not an expert on computer so please let me know!

thanks,
EEnano

Skype Is Down Globally. Fix Doesn't Work

Posted: 07 Jun 2011 06:03 AM PDT

Just wrote about the breaking news on VoiCE: Skype Connection Problem. Skype Is Down Globally! - CrazyEngineers . Skype is down globally and the fix we offered earlier doesn't seem to work this time. People are blaming Microsoft for buying Skype for whooping 8 billion dollars and MS is wondering whether they made right purchase. :)

Civil Engineering Licensure Exam.(Philippines)

Posted: 07 Jun 2011 04:19 AM PDT

To all Civil engineering graduate the following are subjects in the Civil Engineering Licensure Examination(Philippines).

A. MATHEMATICS AND SURVEYING

Mathematics


1.0 Algebra
1.1 Set Theory*
1.2 Real Numbers
1.3 Algebraic Expressions and Operations
1.4 Equations and Inequalities
1.5 Roots and Powers
1.6 Linear, Quadratic and Polynomial Functions
1.7 Factoring
1.8 Roots of Algebraic Equations
1.9 System of Equations
1.10Logarithmic and Exponential Functions
1.11Arithmetic and Geometric Progressions

2.0 Trigonometry
2.1 Circular (Trigonometric) Functions
2.2 Trigonometric Identities and Equations
2.3 Solution of Triangles
2.4 Hyperbolic Functions

3.0 Analytic Geometry
3.1 Cartesian Coordinate System
3.2 Functions and Relations
3.3 Functions and their Graphs
3.4 Straight lines
3.5 Conic Sections
3.6 Polar Coordinates
3.7 Transformation of Coordinates
3.8 Parametric Equations

4.0 Calculus
4.1 Differential Equations
4.1.1 Limits and Continuity
4.1.2 Derivatives and Differentiation
4.1.3 Application of Derivatives
4.1.4 The Differential
4.1.5 Partial Derivatives
4.2 Integral Calculus
4.2.1 Theory of Integrals
4.2.2 Integration Methods
4.2.3 Definite Integrals and Applications
4.2.4 Line and Surface Integrals
4.2.5 Multiple Integrals

5.0 Differential Equations
5.1 First Order Differential Equation
5.1.1 Exact Differential Equation
5.1.2 Integrating Factors**
5.1.3 Separable Variables
5.1.4 Homogeneous Differential Equations
5.1.5 Linear Differential Equations
5.1.6 Applications
5.2 Higher Order Differential Equations

6.0 Other Topics
6.1 Infinite Series
6.1.1 Maclaurin Series
6.1.2 Taylor Series
6.1.3 Fourier Series
6.2 Complex Variables**
6.3 Vector Analysis
6.4 Matrices*
6.5 Determinants*
6.6 Probability and Statistics

7.0 Engineering Economy
7.1 Present Economy Study
7.2 Time-Value Relations
7.3 Selection Among Alternatives
7.3.1 Present Worth Method
7.3.2 Annual Worth Method
7.3.3 Future Worth Method
7.3.4 Internal Rate of Return Method
7.3.5 External Rate of Return Method










Surveying


1.0 Surveying Concepts
1.1 Uses of Surveys
1.2 Operations in Surveying
1.3 Measurement and Adjustments
1.4 Field and Office Work
1.5 Surveying Instruments

2.0 Basic Surveying Measurements
2.1 Distance Measurements
2.1.1 Pacing
2.1.2 Distance Measurement with Tape
2.2 Vertical Distance Measurement; Leveling
2.3 Angle and Direction Measurement
2.3.1 Location of Points
2.3.2 Meridians
2.3.3 Bearing and Azimuth
2.3.4 Magnetic Declination
2.3.5 Instruments Used
2.3.5.1 Engineers Transit
2.3.5.2 Theodolite
2.4 Stadia and Tacheometry
2.4.1 Principles of Stadia
2.4.2 Plane Table and Alidade

3.0 Survey Operations
3.1 Traverse
3.1.1 Deflection Angle Traverse
3.1.2 Interior Angle Traverse
3.1.3 Traverse by Angle to the Right
3.1.4 Azimuth Traverse
3.1.5 Compass Traverse
3.1.6 Stadia Traverse
3.1.7 Plane Table Traverse
3.2 Calculation of Areas of Land
3.2.1 Area by Triangle
3.2.2 Area by Coordinates
3.2.3 Area by Double Meridian Distance (DMD) and Latitude
3.2.4 Irregular Boundaries (Simpson’s and Trapezoidal Rules)
3.3 Triangulation and Trilateralization
3.3.1 Horizontal Control System
3.3.2 Triangulation Figures and Procedures
3.3.3 Error Propagation
3.3.4 Trilateralization
3.4 Astronomical Observation
3.4.1 Celestial Sphere
3.4.2 Equator System
3.4.3 The PZS Triangle
3.4.4 Azimuth and Hour Angle at Elongation
3.4.5 Time
3.4.6 Solar Observation
3.4.7 Stellar Observation

4.0 Engineering Surveys
4.1 Topographic Survey
4.1.1 Horizontal Control
4.1.2 Vertical Control (contours)
4.1.3 Location of Details
4.2 Route Surveying
4.2.1 Horizontal Curves
4.2.1.1 Simple Curves
4.2.1.2 Compound Curves
4.2.1.3 Superelevations
4.2.1.4 Spiral Curves
4.2.2 Vertical Curves
4.2.3 Earthwork Operations
4.2.3.1 Methods of Determining arthwork Volumes
4.2.3.2 Borrow Pits
4.3 Hydrographic Surveys
4.3.1 Datum
4.3.2 Soundings






















B. HYDRAULICS


1.0 Fluid Mechanics
1.1 Properties of Fluids
1.2 Fluid Statics
1.3 Fluid Flow Concepts and Basic Equations
1.4 Dimensionally Analysis and Dynamic Similitude
1.5 Viscous Flow and Fluid Resistance
1.6 Ideal Fluid Flow
1.7 Steady Flow in Closed Conduits
1.8 Steady Flow in Open Channels

2.0 Hydrology
2.1 Hydrologic Cycle
2.1.1 Precipitation
2.1.2 Stream-flow
2.1.3 Evaporation
2.1.4 Transpiration
2.2 Hydrograph Analysis
2.2.1 Runoff
2.2.2 Storage Routing
2.3 Groundwater

3.0 Hydraulics, System and Structure
3.1 Reservoirs
3.2 Dams
3.3 Spillways, Gates, and Outlet Works
3.4 Open Channels
3.5 Pressure Conduits
3.6 Hydraulics Machinery

4.0 Irrigation, Flood Control and Drainage
4.1 Irrigation
4.1.1 Water Requirement
4.1.2 Soil-Water Relation
4.1.3 Water Quality
4.1.4 Methods
4.1.5 Structures
4.2 Flood Control
4.2.1 Design Flood
4.2.2 Flood Control Structures
4.3 Drainage
4.3.1 Estimate of Flow
4.3.2 Storm Drainage
4.3.3 Land and Highway Drainage
4.3.4 Culverts and Bridges
4.3.5 Drainage Structures

5.0 Water Supply and Sewerage
5.1 Fundamental Concept
5.1.1 Mathematics of Growth (Population Forecasting)
5.1.2 Environmental Chemistry
5.1.3 Mass and Energy Transfer
5.2 Water Supply and Treatment
5.2.1 Components of Water Supply System
5.2.1.1 Water Reservoir and Storage
5.2.1.2 Water Distribution System
5.2.1.3 Water Containment Structures
5.2.2 Water Consumptions Periods of Design
5.2.3 Pre-treatment Methods
5.2.4 Principles of Sedimentation
5.2.5 Sedimentation Tank Design
5.2.6 Coagulation-Sedimentation
5.2.7 Slow Sand Filtration
5.2.8 Rapid Sand Filtration
5.2.9 The Rapid Sand Filter
5.2.10 Underdrain System
5.2.11 Wash Troughs
5.2.12 The Washing Process
5.2.13 Clear Well and Plant Capacity
5.2.14 Water Disinfection
5.3 Waste Water Treatment
5.3.1 Quantity
5.3.2 Methods
5.3.3 Theory of Activated Sludge
5.3.4 Aeration Tank
5.3.5 Biokinetic Parameters*
5.3.6 Clarifiers












C. DESIGN AND CONSTRUCTION


1.0 Statics of Rigid Bodies
1.1 Force System
1.1.1 Concurrent and Non-current Force System
1.1.2 Parallel and Non-parallel Force System
1.1.3 Planar and Three Dimensional Force System
1.1.4 Distributed Forces
1.1.5 Frictional Forces
1.2 Equilibrium of Forces
1.2.1 Reactions
1.2.2 Free Body Diagram
1.2.3 Two Force Bodies
1.2.4 Three Force Bodies
1.3 Truss Analysis
1.3.1 Method of Joints
1.3.2 Method of Sections
1.3.3 Graphical Methods
1.4 Beams and Frames
1.4.1 Reactions
1.4.2 Shear Diagrams
1.4.3 Bending Moment Diagrams
1.5 Related Topics
1.5.1 Moment of Lines and Areas
1.5.2 Centroids
1.5.3 Moments of Inertia
1.5.4 Center of Mass
1.5.5 Center of Forces

2.0 Dynamics of Rigid Bodies
2.1 Kinematics of Particles
2.1.1 Rectilinear Motion
2.1.2 Curvilinear Motion
2.2 Kinetics of Particles
2.2.1 Newton’s Second Law
2.2.2 Dynamic Equilibrium
2.2.3 Work and Energy Principle
2.2.4 Kinetic and Potential Energy
2.2.5 Impulse and Momentum Principle
2.3 Kinematics of Rigid Bodies
2.3.1 Translation
2.3.2 Rotation
2.3.3 General Plane Motion
2.4 Kinetics of Rigid Bodies
2.4.1 D' Alembert's Principle
2.4.2 Work and Energy Principle
2.4.3 Impulse and Momentum Principle
3.0 Mechanics
3.1 Stresses and Strains
3.2 Material Properties
3.3 Axially Loaded Members
3.4 Thin Walled Pressure Vessels
3.5 Torsional Stresses
3.6 Internal Forces and Stresses in Beams
3.6.1 Flexural Stress
3.6.2 Shear Stress
3.6.3 Combined Stresses
3.6.4 Principal Stresses
3.6.5 Unsymmetrical Banding
3.7 Deflections
3.7.1 Double Integration Methods
3.7.2 Area Moment Method
3.7.3 Conjugate Beam Method
3.8 Statistically Indeterminate Beams
3.9 Shear Center
3.10 Curved Beams
3.11 Non-homogenous Beams
3.12 Impact Loading
3.13 Stress Concentration
3.14 Repeated Loading
3.15 Elastic Instability (Buckling)
3.16 Analysis of Connections
3.16.1 Riveted and Bolted Connections
3.16.2 Welded

4.0 Structural Analysis
4.1 Loadings
4.1.1 Vertical Loads (dead and live loads)
4.1.2 Lateral Loads (Wind and Earthquake Loads)
4.1.3 Impact Loads
4.2 Energy Methods for Deformation Analysis
4.2.1 Castigliano's Theorem
4.2.2 Virtual Work Method (Unit Load)
4.3 Influence Lines
4.4 Frame Analysis
4.4.1 Approximate Methods
4.4.2 Exact Methods*
4.4.3 Moment Distribution
4.5 Stiffness and Flexibility Methods of Analysis**
4.5.1 Trusses
4.5.2 Beams
4.5.3 Frames

5.0 Design of Timber Structures
5.1 Properties of Wood
5.2 Design of Tension Member
5.3 Design of Bending Members
5.3.1 Laterally Supported Beams
5.3.2 Laterally Unsupported Beams
5.4 Design of Compression Members
5.4.1 Short Columns
5.4.2 Slender Columns
5.4.3 Spaced Columns
5.5 Timber Connections

6.0 Design of Steel Structures
6.1 General
6.1.1 Properties of Structural Steel
6.1.2 Design Philosophy
6.1.2.1 Allowable Stress Design
6.1.2.2 Load and Resistance Factor Design
6.2 Tension Members
6.3 Connections
6.3.1 Bolted
6.3.2 Welded
6.4 Compression Members
6.5 Beams
6.5.1 Compact Sections
6.5.2 Non-compact Sections
6.6 Beam Columns
6.7 Plastic Analysis and Limit Design*
6.8 Composite Steel and Concrete

7.0 Reinforced Concrete Structures
7.1 General
7.1.1 Properties of Concrete Materials
7.1.2 Design Philosophies and Procedures
7.2 Flexural Analysis and Design
7.3 Shear and Diagonal Tension
7.4 Bond, Anchorage Development Lengths
7.5 Serviceability Requirements
7.5.1 Crack Control
7.5.2 Deflections
7.6 Columns
7.6.1 Short Columns
7.6.2 Slender Columns
7.7 Slabs
7.8 Footings
7.9 Retaining Wall
7.10 Pre-stressed Concrete

8.0 Soil Mechanics and Foundation
8.1 Soil Properties
8.2 Soil Classification
8.3 Flow of Water in Soils
8.3.1 Permeability
8.3.2 Seepage
8.3.3 Effective and Porewater Pressure
8.4 Soil Strength
8.4.1 Shear Strength
8.4.2 Bearing Capacity
8.5 Compressibility of Soils
8.5.1 Elastic Settlement
8.5.2 Consolidation Settlement
8.6 Soil Improvement
8.6.1 Compaction
8.6.2 Soil Stabilization
8.7 Earth Pressures and Retaining Wall
8.8 Slope Stability Analysis

9.0 Design of Civil Engineering Structures and Systems
9.1 Transportation Engineering**
9.1.1 Highway and Urban Transportation Planning and Economics**
9.1.2 Driver, Vehicle, Traffic and Road Characteristics**
9.1.3 Highway Design
9.1.4 Traffic Engineering and Highway Operations**
9.1.5 Road and Pavement Design
9.2 Airport Engineering**
9.3 Ports and Harbors
9.4 Containment Structures (Tanks, soils, storage tanks)
9.5 Bridges

10.0 Construction and Management
10.1 Engineering Relations and Ethics**
10.2 Contracts & Specifications
10.3 Construction Project Organization
10.4 Planning and Scheduling (PERT/CPM)
10.5 Construction Estimates
10.6 Construction Methods & Operations
10.7 Construction Equipment Operations and Maintenance

Source: http://www.scribd.com/doc/36881315/Engineering-PRC2

Identify the image and connect.......

Posted: 07 Jun 2011 04:13 AM PDT

need tutorial FM analisys using matlab

Posted: 07 Jun 2011 02:53 AM PDT

hello everybody
i need help, i have search over the web but don't find any tutorial good enough for analysis freqeuncy using matlab while i new in matlab.

hope someone could give a good reference for begineer.
thanks in advance

instrumentation and control engineering project topics

Posted: 07 Jun 2011 01:51 AM PDT

hi friends, pls i need project topics on instrumentation and control engineering (M.Engn.)

What kind of graph is this? [Image]

Posted: 07 Jun 2011 01:45 AM PDT


What do electrical engineers usually call this graph (I am pretty sure that this isn't just some circuit) and what should I do in order to comprehend it? Thanks in advance!!

Embedded system course

Posted: 07 Jun 2011 12:44 AM PDT

Hi this is Rohit Singh, I want to know the scope of embedded system in market.
As i m going to take this course from oasis techologies, Pune.
Posted by at

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)