tag:blogger.com,1999:blog-12850770333909295552024-03-22T13:04:46.997+08:00ALEX CornerSome useful stuffs...Alexhttp://www.blogger.com/profile/02895498180334057437noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-1285077033390929555.post-86770400456170035042015-12-20T15:43:00.000+08:002015-12-20T15:43:58.094+08:00Extract Topographic Points from Google Earth using TCX Converter<p>This tutorial is for those who want to know a way of extracting topographic points from google earth.</p>
<p>Step 1: Download and install TCX Converter <a href="http://nia-connect.com/file/view/130/tcx-converter"><img alt="TCX Converter" src="http://nia-connect.com/cache/1450594178/default/file/icons/application.gif" /></a> </p>
<p> </p>
<div style="border: 0px; color: #333333; font-size: 14.4px; margin-bottom: 15px; padding: 0px; vertical-align: baseline;">Step 2: Open Google earth application and navigate to the area of interest (the area that you want the contour points).</div>
<div style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhWTEg72wv6ICunmXgVRWHpUYL6Hbiiyxh4cfAp2jqwtL4336wVnunXFo74BPWdZg4GGoYipe3txBLzsEVdtcGFoByhRucdRCpM688xs04kTPn6NU9bQWDnVcKfAo8-HHffMxclccAQ64Q/s1600/dem1.jpg" style="margin-left: 1em; margin-right: 1em;"><img alt="image" height="356" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhWTEg72wv6ICunmXgVRWHpUYL6Hbiiyxh4cfAp2jqwtL4336wVnunXFo74BPWdZg4GGoYipe3txBLzsEVdtcGFoByhRucdRCpM688xs04kTPn6NU9bQWDnVcKfAo8-HHffMxclccAQ64Q/s640/dem1.jpg" style="border: 0px;" width="640" /></a></div>
<div style="border: 0px; color: #333333; font-size: 14.4px; margin-bottom: 15px; padding: 0px; vertical-align: baseline;"> </div>
<div style="border: 0px; color: #333333; font-size: 14.4px; margin-bottom: 15px; padding: 0px; vertical-align: baseline;">Step 3: Create a path to cover the area mentioned above. More points means more accuracy. (Note: Google earth points will only give us approximate values and not the exact one as we can see on the field during actual survey)</div>
<div style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEieYoCrI4rg4GafQj1Fkou9vnTMbPbCbCuNRWqq-rgj2d9cljJCg_FAMSwNVFrYaaBmy-_BrPTe8sBDoadW7T4k3CbVMC3Y2-Mq6KMG1IRC1k_CVkknT7wTQOUgPhiGa56QFhYvyIBhtrU/s1600/den2.jpg" style="margin-left: 1em; margin-right: 1em;"><img alt="image" height="358" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEieYoCrI4rg4GafQj1Fkou9vnTMbPbCbCuNRWqq-rgj2d9cljJCg_FAMSwNVFrYaaBmy-_BrPTe8sBDoadW7T4k3CbVMC3Y2-Mq6KMG1IRC1k_CVkknT7wTQOUgPhiGa56QFhYvyIBhtrU/s640/den2.jpg" style="border: 0px;" width="640" /></a></div>
<div> </div>
<div>Step 4: After creating the path, right-click the path name then click "Save Place As" and save in in <strong>kml </strong>format (e.g. Path1.kml)</div>
<div> </div>
<div style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgrwuPcnen-mLWB2-0pPHxceJOzNFB_42XMmI-WpI1NVN1Y2Wys0cV75muvfSuOPoDejJkyBFA8cUuHZ4AtqavE95_9iA8SGrVK_ZVnGpccmXYdfy-nm9pbCJnSqedk5MJVt7ZvQDUCilc/s1600/dem3.jpg" style="margin-left: 1em; margin-right: 1em;"><img alt="image" height="358" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgrwuPcnen-mLWB2-0pPHxceJOzNFB_42XMmI-WpI1NVN1Y2Wys0cV75muvfSuOPoDejJkyBFA8cUuHZ4AtqavE95_9iA8SGrVK_ZVnGpccmXYdfy-nm9pbCJnSqedk5MJVt7ZvQDUCilc/s640/dem3.jpg" style="border: 0px;" width="640" /></a></div>
<div> </div>
<div>Step 5: After the above step, you can now close google earth. Open The TCX Converter you downloaded then click "OPEN FILE" and select the kml file you saved from google earth. If the software is in another language, select "English" from the left topmost dropdown menu. </div>
<div> </div>
<div>
<div style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhRRe5XUyhr5CfgX5mw_zMy8ilvt7fiu1Am8d06ZfhEv7QhRsPuhllxR2i92li7Rbv_KM-3JJRlMa_x9tfXU2SvxqIXTzOXI-p3fEB9cmojO-8W1LVmRqJv-8yMJb7W_rx9bBaYwMBqxv0/s1600/dem4.jpg" style="margin-left: 1em; margin-right: 1em;"><img alt="image" height="358" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhRRe5XUyhr5CfgX5mw_zMy8ilvt7fiu1Am8d06ZfhEv7QhRsPuhllxR2i92li7Rbv_KM-3JJRlMa_x9tfXU2SvxqIXTzOXI-p3fEB9cmojO-8W1LVmRqJv-8yMJb7W_rx9bBaYwMBqxv0/s640/dem4.jpg" style="border: 0px;" width="640" /></a></div>
</div>
<div>
<p> </p>
<p>Step 6: This will now load the available points generated from the kml file. You will notice that the ALT (altitude) column lists zero (0) values. You have to update this and you need an internet connection.</p>
<div style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEioTCu28cv244EH9xQvOveq8zWd8bI5lPs3bHqNabEc1epo-WRnNkelVSXnCrM4P4LFHNlKRdXZHp56RkPTcDoBPjwhCSfdI4wcHgNw9hYcy-U5pHuxPmyxPGQw8oporIwuckBrp6voNRY/s1600/dem5.jpg" style="margin-left: 1em; margin-right: 1em;"><img alt="image" height="358" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEioTCu28cv244EH9xQvOveq8zWd8bI5lPs3bHqNabEc1epo-WRnNkelVSXnCrM4P4LFHNlKRdXZHp56RkPTcDoBPjwhCSfdI4wcHgNw9hYcy-U5pHuxPmyxPGQw8oporIwuckBrp6voNRY/s640/dem5.jpg" style="border: 0px;" width="640" /></a></div>
<p> </p>
<p>Step 7: Click on the Track/Modify tab then click "Update Altitude". This should update the altitudes from the reading on google earth based on Longitude/Latitude combination. If the values on the ALT column remains zeros or error, just click on Update Altitude again. It will work. Be patient :-)</p>
<div style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiCsQLlceU1jJ15WllhKreBDmZX1N-PH19lsx1jHnA7-Jm7HSVc_wlTREkn7S8dAecw6NE96dtdueiFOgEnxqRlhNyojOWX92LTEG_IV1XU0z0MYauaH2SsqX3sEfBZfp5-7nBw2FtS4yw/s1600/dem6.jpg" style="margin-left: 1em; margin-right: 1em;"><img alt="image" height="358" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiCsQLlceU1jJ15WllhKreBDmZX1N-PH19lsx1jHnA7-Jm7HSVc_wlTREkn7S8dAecw6NE96dtdueiFOgEnxqRlhNyojOWX92LTEG_IV1XU0z0MYauaH2SsqX3sEfBZfp5-7nBw2FtS4yw/s640/dem6.jpg" style="border: 0px;" width="640" /></a></div>
<div style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjoJG2y6miT1-GA_xiYe8teesT66yVnmfrPorazi9NfwlasG3hj-cX1hYAD1VEtaYG53TX-6HDDGV7tP-Zyb80Y_oMXjIV3b1glZAan143xuOKc5SrdEvFa5XpPbuoy44yZ09tws3pmLF0/s1600/dem7.jpg" style="margin-left: 1em; margin-right: 1em;"><img alt="image" height="358" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjoJG2y6miT1-GA_xiYe8teesT66yVnmfrPorazi9NfwlasG3hj-cX1hYAD1VEtaYG53TX-6HDDGV7tP-Zyb80Y_oMXjIV3b1glZAan143xuOKc5SrdEvFa5XpPbuoy44yZ09tws3pmLF0/s640/dem7.jpg" style="border: 0px;" width="640" /></a></div>
<p> </p>
<p><span style="font-size: 14.4px;">Step 8: After generating the altitudes, click on the File Export tab and click Save csv File. Click No on the dialog box that will appear to make a comma (,) delimited values. This means that the columns will be separated by commas when you view it in a text editor. </span></p>
<div style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgL3QyEQHRDsOml0Mqau_uJ3YwBY_ZUxQacPzceTt0QSAq_Hfwmy3Zc9T8v9IOirFcCGEjywiDZ9kV7q53hAETFKzca-_EmDsrX3T2ymcptEAfmtIAdqY4dGYJ3PP6PwWlUlqYc-lKUvco/s1600/dem8.jpg" style="margin-left: 1em; margin-right: 1em;"><img alt="image" height="358" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgL3QyEQHRDsOml0Mqau_uJ3YwBY_ZUxQacPzceTt0QSAq_Hfwmy3Zc9T8v9IOirFcCGEjywiDZ9kV7q53hAETFKzca-_EmDsrX3T2ymcptEAfmtIAdqY4dGYJ3PP6PwWlUlqYc-lKUvco/s640/dem8.jpg" style="border: 0px;" width="640" /></a></div>
<p><br />
After generating this point datas, you can now use it in either GridView of Autocad Civil 3d to generate your Topographic Map. </p>
<p>Hope this could help...</p>
</div>
Alexhttp://www.blogger.com/profile/02895498180334057437noreply@blogger.com16tag:blogger.com,1999:blog-1285077033390929555.post-40450086736529902802014-11-18T08:26:00.000+08:002015-07-29T14:26:43.858+08:00SCILABIf you are familiar with MATLAB software, you will find SCILAB fascinating, not just because of its functionalities like MATLAB but because it is an open source software. Open source softwares are free. Here is a small description about SCILAB:<br />
<br />
Scilab is an <a href="http://en.wikipedia.org/wiki/Open_source">open source</a>, cross-platform <a href="http://en.wikipedia.org/wiki/Numerical_analysis">numerical computational</a> package and a <a href="http://en.wikipedia.org/wiki/High-level_programming_language">high-level</a>, numerically oriented<a href="http://en.wikipedia.org/wiki/Programming_language">programming language</a>. It can be used for <a href="http://en.wikipedia.org/wiki/Signal_processing">signal processing</a>, <a href="http://en.wikipedia.org/wiki/Statistical_analysis">statistical analysis</a>, <a href="http://en.wikipedia.org/wiki/Image_processing">image enhancement</a>, <a href="http://en.wikipedia.org/wiki/Fluid_dynamics">fluid dynamics</a>simulations, <a href="http://en.wikipedia.org/wiki/Optimization_(mathematics)">numerical optimization</a>, and modeling, simulation of explicit and implicit <a href="http://en.wikipedia.org/wiki/Dynamical_system">dynamical systems</a> and (if the corresponding toolbox is installed) symbolic manipulations. Scilab is the most complete open source alternative to <a href="http://en.wikipedia.org/wiki/MATLAB">MATLAB</a>.<br />
<br />
(Source: Wikipedia)Alexhttp://www.blogger.com/profile/02895498180334057437noreply@blogger.com0tag:blogger.com,1999:blog-1285077033390929555.post-67300833213936320092014-09-03T22:05:00.003+08:002015-07-29T14:27:06.295+08:00Diversion Dam SoftwareFirst of all, I would like to give thanks to the people who made the creation of this software possible. To Engr. Zeny for encouragement to me to write this program and support during that time. To Engr. Cocoy for giving answers to every questions that I can throw and allowing me to take a peek for his excel program similar to the one I wrote and to my fellow designers and friends who helped me debug and test the program to see if the results were acceptable.<br />
<br />
This program I called 'Diversion' is an aid to hydraulic <br />
<a name='more'></a>computations of diversion structures capable of solving three (3) different weirs (Ogee Weir, Sharp-Crested Weir and Broad-Crested Weir). It is written in Visual Studio 2012 and took me initially of three months to complete and another three months for revision due to some bugs of the program. Included is a stability analysis of ogee-crested weir.<br />
<br />
I haven't wrote a documentation about the program yet but it's self explanatory and easy to learn with minimal support. However, for those who have questions regarding the usage and results, you can always comment here or directly send me and email.<br />
<br />
It will run on windows XP, Windows 7 and 8.<br />
<br />
<a href="http://ge.tt/api/1/files/6d2uLCt1/1/blob?download">Click here to download installer</a><br />
<br />
Below are some screenshots of the program window:<br />
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<b>Ogee Shaped Single Weir</b></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxAIsS-TOjPXZvfDEhGUrhU6rwE2R9_TulyzkYjBssmt3sUnYILr0cPwKdT-vfFpoB1RMnWPMW8iGXYusoUv1fJkmsGreRwn0v-f7X0NAO31lu4hk8nlHxgIo3NqFNY0UHotb4BWrHzRQ/s1600/WeirMain.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="223" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxAIsS-TOjPXZvfDEhGUrhU6rwE2R9_TulyzkYjBssmt3sUnYILr0cPwKdT-vfFpoB1RMnWPMW8iGXYusoUv1fJkmsGreRwn0v-f7X0NAO31lu4hk8nlHxgIo3NqFNY0UHotb4BWrHzRQ/s1600/WeirMain.jpg" width="320" /></a></div>
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<b>Multiple CrestedWeir</b></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj1CJGDhmg5cz_psxcjD6m4Gz02OmSQJCNfj8OVlT2FiKCYxUPYvgQ6eyp4GK09g02xjPE1hvNdpKFiypxsY_kXshN0Tzh_6Fs8WVi7ddJQtH5rnlxt_isIZFf1Y3S9DQMEoQYhyphenhyphendzIubY/s1600/Weir+Multiple.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="224" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj1CJGDhmg5cz_psxcjD6m4Gz02OmSQJCNfj8OVlT2FiKCYxUPYvgQ6eyp4GK09g02xjPE1hvNdpKFiypxsY_kXshN0Tzh_6Fs8WVi7ddJQtH5rnlxt_isIZFf1Y3S9DQMEoQYhyphenhyphendzIubY/s1600/Weir+Multiple.jpg" width="320" /></a></div>
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<b>Section of Stability Analysis</b></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjqg6_dPFiZpFZD76JNxo7JXpB2j-GxBNHjiPS5A-C7bs62ctCkv-XfBThTBrcXhvFc8t4inZWycKfUiRdOPcmhr8vbwnQDs-jQD4esLAHg4VOaVhHDl3p_LiBzaTqmIcJtp6pTnG_-8Qs/s1600/Ogee+Section.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="202" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjqg6_dPFiZpFZD76JNxo7JXpB2j-GxBNHjiPS5A-C7bs62ctCkv-XfBThTBrcXhvFc8t4inZWycKfUiRdOPcmhr8vbwnQDs-jQD4esLAHg4VOaVhHDl3p_LiBzaTqmIcJtp6pTnG_-8Qs/s1600/Ogee+Section.jpg" width="320" /></a></div>
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The software requires a registration key that depends on every machine. Upon opening the software for the first time, you will be prompted to enter a key and a request code will be shown on the same window. Just post your request code in the comment with your Name, Address, Company and a contact email. Any suggestion for the improvement will be well taken.</div>
<br />Alexhttp://www.blogger.com/profile/02895498180334057437noreply@blogger.com13tag:blogger.com,1999:blog-1285077033390929555.post-59401942629709841112014-09-02T17:47:00.001+08:002015-07-29T14:27:30.927+08:00Android Canal DesignAs a designer of irrigation structures, one of the most structure that I often encounter to design is the irrigation canal. Because of this, some of us created computer programs to aid us in the computation of hydraulic analysis of irrigation or drainage canals. However,<br />
<br />
<a name='more'></a> I found it more useful if you can bring your program in the field and quickly verify some data, so I developed an Android application that solves hydraulic analysis of irrigation and drainage canals.<br />
<br />
Click <a href="http://ge.tt/api/1/files/6d2uLCt1/0/blob?download">here to download</a>.<br />
<br />
After installing and opening the app, you will be prompted with a key input. You may email me the request code at alexius.academia@gmail.com and I will send you the key. Or if you may want you can bypass it but everytime you use the app, that window will always open. To bypass just press back key once.Alexhttp://www.blogger.com/profile/02895498180334057437noreply@blogger.com0tag:blogger.com,1999:blog-1285077033390929555.post-91773519527189777602014-09-02T13:50:00.000+08:002015-07-29T14:27:47.569+08:00Prevent Flash Drives from Being Infected by VirusesFlash drives or USB sticks are very good at handling files fast at portable. You can bring your electronic files anywhere with just a small hardware and just plug-in in any available machine that can read it. However this advantage has a corresponding disadvantage associated with.<br />
<br />
Flash drive are also pretty easy to be infected by computer viruses and as easy as spreading them to other machines. Now I will share a simple tweak to prevent flash drives from being infected by viruses. This is what I'm using now, and even if you plug it in an infected computer, the risk of being infected by virus automatically is eliminated. It can only be infected by virus by manually copying the infected file on the drive. So here it is.<br />
<br />
1. First, format the flash drive to NTFS file system. See image below:<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfjm-1jIcqq2GWW7DuiGgX93Nhh4yJKvJ06zEgKzHLfMJyhwzD4U5CVpu34AC6hq3pe9QfDXbD3qOzYhhB-NrXFcWU8chFb_XsI0tVMQII2Eih7nEcalCMFMMjWPwSbBdvagQxRWQzFeQ/s1600/format_disk.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfjm-1jIcqq2GWW7DuiGgX93Nhh4yJKvJ06zEgKzHLfMJyhwzD4U5CVpu34AC6hq3pe9QfDXbD3qOzYhhB-NrXFcWU8chFb_XsI0tVMQII2Eih7nEcalCMFMMjWPwSbBdvagQxRWQzFeQ/s1600/format_disk.jpg" width="174" /></a></div>
2. After formatting, you can now use the security function of NTFS file system.<br />
Open the flash drive from My Computer then Right Click the mouse and select 'Properties'. The window below will open:<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhxwl9pjA-o8BukcgwPpqVylXY7qTo89DtYsRN2l4Cv3rePR7qX0zvlzvAB2SaU3slFKqM7wABfFmVpSbkC_n1tKgdq0rYZxAerKBsgq8UeuFu92nn7hSkM9RuUboBqjs0-4LZ8oqPstxo/s1600/properties.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhxwl9pjA-o8BukcgwPpqVylXY7qTo89DtYsRN2l4Cv3rePR7qX0zvlzvAB2SaU3slFKqM7wABfFmVpSbkC_n1tKgdq0rYZxAerKBsgq8UeuFu92nn7hSkM9RuUboBqjs0-4LZ8oqPstxo/s1600/properties.jpg" width="257" /></a></div>
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3. Modify the permission and select to allow read only. But before doing that, you must create first a folder where you will put all your files. After setting the permission of the root folder, set the permission of the newly created folder with full control so that you can place your files there.</div>
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4. After that, put all your files on the newly created folder because you cannot put files on the root. If you cannot put file on the root, it means a virus cannot infect it automatically reducing the risk of being infected.</div>
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* That's it! you're done.</div>
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Note: Your flash drive could still be infected by virus if you manually copied an infected file inside the folder you created.</div>
Alexhttp://www.blogger.com/profile/02895498180334057437noreply@blogger.com0tag:blogger.com,1999:blog-1285077033390929555.post-52221590411475939972014-09-02T07:05:00.001+08:002015-07-29T14:28:06.108+08:00Import Terrain Surface From Google Earth to Autocad Civil 3DAs the title says, we will input contours from google earth to autocad civil 3D 2010.<br />
First, you will need to have Autocad Civil 3D and Google earth installed in your system and an internet connection as well. First go to google earth and zoom in to areas<br />
<a name='more'></a>that you're insterested in getting the terrain, then go to Cad to set up coordinate system. Go to Toolspace,then Settings, then right click on the drawing<br />
and click Edit Drawing Settings. On Units and Zone tab, select Philippines as categories (For philippines PRS92) then on Available Coordinate system select 'PRS92' from the dropdown list. Click apply then click Ok.<br />
<br />
Now you're good to go. type "importgesurface" (Google earth must be openned and there should be an internet connection), choose coordinate system, then on the Create Surface window click Ok.<br />
<br />
The topographic layout will now be imported. Click on the surface and on the ribbon click Surface Properties > Edit Surface Style.<br />
<br />
On the contour tabs, expand contour interval then set your desired intervals.<br />
<br />
Then enjoy exploring the rest.<br />
<br />
For questions on creating profile and cross sections of a proposed alignment, just comment.Alexhttp://www.blogger.com/profile/02895498180334057437noreply@blogger.com1tag:blogger.com,1999:blog-1285077033390929555.post-66419962201304187432014-09-02T06:53:00.008+08:002015-07-29T14:28:24.668+08:00Structural analysis for vertical concrete canal liningsAssumptions:<br />
1. No water inside the canal and the embankment outside<br />
is up to the top bank of the canal.<br />
2. Soil is saturated.<br />
<br />
Procedure of analysis:<br />
<br />
1. Compute for pressure at canal bottom using the formula:<br />
<h2>
<br />
<a name='more'></a></h2>
<span style="color: yellow;"> (1-sin(A))</span><br />
<span style="color: yellow;"> Ph = ----------- x SoilWeight x CanalHeight</span><br />
<span style="color: yellow;"> (1+sin(A))</span><br />
A = Angle of internal friction of soil<br />
<br />
<br />
2. Compute for total shear on the wall:<br />
<span style="color: yellow;"> Ph x Canalheight</span><br />
<span style="color: yellow;"> Vh = ----------------</span><br />
<span style="color: yellow;"> 2</span><br />
<br />
3. Compute for Moment @ Canal bottom<br />
<span style="color: yellow;"> Vh x CanalHeight</span><br />
<span style="color: yellow;"> Mh = ------------------</span><br />
<span style="color: yellow;"> 3</span><br />
4. Compute for total Weight of Canal per 1-m strip (Wcanal).<br />
<br />
5. Compute for soil bearing pressure assuming soil bearing<br />
capacity is sufficient.<br />
<span style="color: yellow;"> Wcanal</span><br />
<span style="color: yellow;"> Pb = ---------------------</span><br />
<span style="color: yellow;"> Canal Gross Width (W)</span><br />
<span style="color: yellow;"> </span><br />
6. Compute for weight of canal flooring (Wslab)<br />
<span style="color: yellow;">Wslab = 2,400 x FloorThickness(t1)</span><br />
<br />
7. Compute for uplift due to water pressure.<br />
<span style="color: yellow;"> Wuplift = 1,000 x (CanalHeight + t1)</span><br />
<br />
8. Net upward force acting on the canal bottom<br />
<span style="color: yellow;"> Pv = Pb - Wslab + Wuplift</span><br />
<br />
9. Compute for shear at slab support<br />
<span style="color: yellow;"> Pv x CanalBase</span><br />
<span style="color: yellow;"> Vv = --------------</span><br />
<span style="color: yellow;"> 2</span><br />
<br />
10. Compute for Moment at Support<br />
<span style="color: yellow;"> Pv x CanalBase^2</span><br />
<span style="color: yellow;"> MvNeg = ----------------</span><br />
<span style="color: yellow;"> 12</span><br />
<br />
11. Compute for Moment at Midspan<br />
<span style="color: yellow;"> Pv x CanalBase^2</span><br />
<span style="color: yellow;"> MvPos = ------------------</span><br />
<span style="color: yellow;"> 24</span><br />
<br />
12. Using these moments, you can now compute for the<br />
required steel reinforcements then compute<br />
the required spacings.<br />
<span style="color: yellow;"> M</span><br />
<span style="color: yellow;"> As = -------</span><br />
<span style="color: yellow;"> fs x j x d</span><br />
<br />
* Assuming d is half of the member thickness or depending on your<br />
decision whether where to put the reinforcements.Alexhttp://www.blogger.com/profile/02895498180334057437noreply@blogger.com1tag:blogger.com,1999:blog-1285077033390929555.post-85972163721323027912013-11-05T17:02:00.000+08:002015-07-29T14:28:42.338+08:00How to show Hidden System Files and Folders on Flash DrivesComputer viruses are programs that copy themselves automatically and may destroy<br />
your files. One of the effect of a virus on a usb flashdrive is turning all its contents<br />
to Protected Operating System Files so that if you insert it to a computer, you can't<br />
see any files inside because it is hidden. Showing the hidden files on the folder<br />
options is not enough, you have to uncheck the 'Hide Protected System Files' option<br />
as well. But this<br />
<a name='more'></a>will not solve the problem. You can only see your files temporarily.<br />
<br />
To overcome this, follow the instruction below.<br />
<br />
<span style="color: yellow;">1. Open command prompt.</span><br />
<span style="color: yellow;">2. Type: attrib -S -H G:\*.* /S /D /L</span><br />
<br />
* This will unset the attribute "Protected Operating System Files" on the files from a usb<br />
flashdrive on drive 'G:'.Alexhttp://www.blogger.com/profile/02895498180334057437noreply@blogger.com0tag:blogger.com,1999:blog-1285077033390929555.post-43982211992989286372013-09-05T22:23:00.000+08:002015-07-29T14:28:55.051+08:00Rankine's Earth Pressure TheoryRankine's earth pressure theory is widely used in analyzing the lateral pressure exerted by earth to a vertical wall (e.g. Retaining Wall) as long as it meets certain assumptions used in this theory.<br />
Assumptions are the wall should be vertical and the friction resistance between the wall and the soil is neglected and the soil should be granular.<br />
<br />
Pressures acting on the soil consists of three types; active, passive and at rest.<br />
<br />
Rankine's coefficients are Ka for active, Kp for passive and Ko for at rest.<br />
<br />
Applications:<br />
<br />
<span style="color: yellow;">1. Active pressure</span> - assumed as horizontal neglecting the friction between soil and wall. This friction force gives a stabilizing <br />
<a name='more'></a>effect on the wall and is normally ignored for added factor of safety. Active pressure happens when the wall permits a certain amount of movement due to earths lateral pressure and has a formula of Pa = (1-sin A) / (1+sin A) x Y x H<br />
where: Y = effective unit weight of soil (bouyant unit weight for saturated soils)<br />
H = Height of wall<br />
A = angle of internal friction of soil<br />
<br />
<span style="color: yellow;">2. Passive pressure</span> - when the wall is pushing onto the soil and develops a larger compression on the soil.<br />
Pp = (1+sin A) / (1-sin A) x Y x H<br />
where: Y = effective unit weight of soil (bouyant unit weight for saturated soils)<br />
H = Height of wall<br />
A = angle of internal friction of soil<br />
<br />
<span style="color: yellow;">3. At rest pressure</span> - when the structure is not permitted to move, thus developing a higher stress than the active pressure. This is due to the overburden pressure of the soil that is being resisted by the restrained structure.<br />
Po = (1-sin A) x Y x H<br />
where: Y = effective unit weight of soil (bouyant unit weight for saturated soils)<br />
H = Height of wall<br />
A = angle of internal friction of soil<br />
<br />
These pressures acts at the depth 'H' from the soil whichever is applicable. Total lateral load would be F = P x H / 2 acting at H/3 from the bottom assuming there is no inclination on the embankment behind the wall.Alexhttp://www.blogger.com/profile/02895498180334057437noreply@blogger.com0