construction process of a trench bridge

Hi all! How are you guys today? I hope you are always healthy in your daily routine.

A few days ago I visited my brother's house which is a little far from my house, it took me approximately 5 hours to get to my brother's house, I stayed there for a week, because I haven't seen him for about a year. without looking at him, of course I really miss him, as in general when meeting people we love, of course we can spend time with them, talking and telling stories about each other's experiences and also remembering a little funny incident when we were little while coffee and smoking in front house.

While I was there I saw that there was construction of a ditch bridge in front of the neighbor's house, so every morning I tried to see and pay attention to the stages and process of making the bridge to completion, I saw many things from this construction process, starting from cleaning the trench. and also casting to assembling reinforcing iron for the floor.

In the process of making this bridge, I saw that there were 3 workers and one of them was the conductor, this bridge was built on a moat that has a width of 1.5 meters, the size for this bridge is approximately 2 meters wide and 4.5 meters long.

According to the conductor's answer, the cost required for this building is $550 and that includes materials and workmanship costs, while the materials needed for this construction are;

Cement 16 sacks
Iron 12 mm 20 rods
5 cubic sand

The main process that I saw after the trench was cleaned was the installation of molds for the lower left support, which was then followed by assembling the iron supports, after all the iron was assembled and then put into the prepared molds, the distance between one iron and the other was approximately 20 cm and everything is stretched upwards which will later be bent and united with a support on the right side, then will be cast to fill the molds that has been installed. .

After the casting hardens, the molds will be removed and attached to the supporting part next to it and a similar process is carried out until the casting process and releasing the molds again when the cement hardens.

Then the molds will be installed for the bridge floor, before the molds is installed, wood will be plugged under it as a barrier, and the wood that is plugged in must be tightly so that when the casting process is carried out the molds does not collapse down.

After all the molds are installed, all the extra iron towering upwards will be bent and put together with each other and the more ends will be cut and other iron will also be added in the opposite direction and then tied with wire. iron, in the process of tying this iron iron the workers use a tool similar to a fishing hook and this tool will be rotated until the iron wire is really strong and the iron does not shift anymore.

after all the iron has been assembled, the boards will be installed as a retaining molds for the cement mortar on all sides of the bridge floor, then the casting process begins, I asked the conductor what is the ratio of the mix between cement and sand to produce a strong cast and sturdy, he replied that to produce a good cast and solid results it is 1:2.5 meaning 1 bucket of cement then the sand to be mixed is 2.5 buckets of sand.

And that's a little bit of the construction process of a trench bridge in my post this time, I hope you like it and see you in the next post.