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Show this video to the engineers of Rathoa Haryam Bridge on how to build a cable stay bridge in an earth quake zone on silt and sand ruclips.net/video/dQf_vE7tOlw/видео.html The bridge could be completed in phases. First just for people, bikes and motor bikes and one car at a time, charging a toll to construct the next phase. But not lorries or vans. Charging a toll for the next phase Start when the river level is down, build thick soil barrier around where you will be digging and pump out the remaining water forming a cofferdam to hold the water out from under the bridge, like they did here ruclips.net/video/wuCBJrK1oqk/видео.html Then build another barrier outside that one. While you do the ground work let the cars and vans pass over the outside barrier and collect money off the cars, vans and the lorries as they pass, to finance the finishing of the bridge. So that if one barrier leaks, the next barrier holds the water while you dig the foundations ruclips.net/video/URC125wpMS4/видео.html Then just dig down 5 meters and add piles going to the solid rock if found and fill the 5 meter depth hole with large rocks and then lay a large reinforced concrete slab on top of the rocks on either side of the river so that it could move around in an earth quake and build two more towers on the slabs, one on either side of the river and copy and build this cheap Bailey Bridge for the platform section like this ruclips.net/video/Jo4QbLr2dqc/видео.html only letting one car at a time pass until you collect enough money to raise the towers to the top and add the cables This study shows that the subsoil at the bridge site consists mostly of lean clay with ground water table at a shallowest depth of 0.3 m below NSL during the period of field investigations. Six pile load tests have been conducted on test piles with length in the range of 35 m and 45 m and with diameter of 1000 mm. The full study results are here journal.uet.edu.pk/ojs_old/index.php/pjeas/article/view/1097/228 Here are some ideas, but you will have to develop your own idea. ruclips.net/video/dQf_vE7tOlw/видео.html If the solid rock is too deep, like the study suggests, do boring and insert metal tubes in the silt and sand where you want to build more pillars. Insert reinforced concrete into the tubes. Then dig 5 meters below the bottom of the river around the tubes and fill all the area around the piling or tubes with huge rocks for 3 m with smaller rocks in between and finally cover that with a 1.5 m thick stone and gravel and round rocks and compact each layer and then put 2 large thick reinforced concrete slabs around 80m wide on top of the gravel on either side of the river, like a sledges or 2 large upside down tables that could slide around on the gravel in an earth quake (let the slab slide on the piling and gravel, don't fix it). Leave a gap between these slabs for the river water to pass and put large 3m wide concrete pipes in the stone filling below the river bed to allow the water to pass through if there is further dredging in the dam in the future. For strength, the top of each slab could have ribs like the bottom of a multi story carpark floor. Then build a cylindrical hollow towers coming up from each slab (or 4 hollow towers 1 near each corner of each huge reinforced concrete slab so that it forms two large upside down tables on either side of the river with galvanised tension cables or galvanised girders connecting the base of one leg to the top of an other leg forming triangles ruclips.net/video/mBHJtWbsiaA/видео.html Build horizontal platforms on the towers for base isolators to sit on and then the horizontal bridge platform to sit on, so that it could move in an earth quake. You could build a cheap Bailey Bridge for the platform section like this ruclips.net/video/Jo4QbLr2dqc/видео.html. Then the legs/towers continue up above the road platform and meet together in the sky and attach the cables off that to hang the bridge platform off. These upside down tables should not be attached to the existing pillars and should be free to move around in an earth quake. Water proof the steal in the reinforced concrete with zink oxide or tar or galvanise it. Then put the road concrete girders on them. You may not need a steel bridge. Then get a professional company to recheck everything. Students in Pakistan don't get practical skills, hence they find it very difficult to find jobs. As part of their final year project ask for students to volenteers from different universities and different subjects a work on a large project to look at how the Rathoa bridge could be completed. Nespak did some design but they may be too expensive ruclips.net/video/RBnCHR1wBkI/видео.html, talk to them too. Xinjiang Beixin Road and Bridge Group Co. Ltd did some of the construction work. Get the design and architecture students to help with the design, get the mechanical, the civil engneering and mathematics students to work with them on the calculations, design each part and do its calculations using software. Get the Electrical Engineers to help with the electrics and the lighting systems. Get surveyor students to measure the existing layout and add it into the software that will be used to design the bridge and calculate the materials needed and get accountants and business students to calculate the costs and do the business plans and ideas for how to raise money for the project. Get them to divide up the work and form teams to complete each part and have scrum meetings every morning to discuss the progress using an online kanban board. Get the business and project management students to act as scrum masters. Get Phd students to work on how to tension cables and the more compex problems. Get volenteers who work on actual bridges to help them. The students could send emails to civil engineers around the world who specialise on prestressed concrete and the bridge cables for advice and they will help them too. In the process they will gain practical, business and team working experience and the skills to use structural engineering software so that they could work as freelancers. These companies may even employ them if they see cutting edge calculations and safe techniques developed. Cable crane: If you watch these videos ruclips.net/video/RBnCHR1wBkI/видео.html ruclips.net/video/FO5RHhC--Ns/видео.html They have already constructed 2 platform bases on one side and 2 on the other side to build four temporary towers to run cables off to build a cable crane to build the steal arches. Like they built the cable crane for the Dangali Bridge as shown here ruclips.net/video/KP6tkmfjC7k/видео.html ruclips.net/video/8WdZmeSe_dY/видео.html Alternatively if the two arches started from the ground, rather than the pillars, the bridge will be stronger like this bridge. www.pinterest.co.uk/pin/182395853628878348/ But since the river is so wide, the arches will have to be much bigger and hence more expensive. Its possible that in the original design the arch was on the pillar because they did not want any steel in the arch to rust, if they started it from under water it could rust. The steel (used for reinforcement) in the concrete will have to be coated in something like tar to stop it rusting if its starts from the ground. Hence the cable stay bridge like this in an earth quake zone on silt and sand ruclips.net/video/dQf_vE7tOlw/видео.html will be better. Building a bridge in such a large dam, that is in an earth quake zone, where there is so much silt is very difficult. May be the company subsidiary building the bridge did not have the technology to compete it. ruclips.net/video/AhcLZpGx9ww/видео.html ruclips.net/video/Ua0qyVB7unM/видео.html You will have to calculate the cable stay bridge cable strength and concrete strength. Add galvanise wires in the concrete with bent ends to form a more crack resistant fibre reinforced high strength concrete mix. Having the cables go down at 45% is more efficient. ruclips.net/video/LYEUiozZgj8/видео.html You could also use software to do the calculations www.midasbridge.com/en/blog/casestudy/static-analysis-of-cable-stayed-bridges

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