Digging trenches are an essential part of numerous constructions. They are used to install telephone lines and pipes. Because of the high moisture content in these soils, trench can be an arduous job. This is due to the fact that it’s difficult to not just remove dirt and other debris from nearby objects but also ensure security as you may cause serious injuries should you accidentally expose your skin.
Trench boxes are needed to be used for any repair or type that requires access to the ground. They can be used to keep the ground from falling down based on the material and soil quality. Trench boxes are made out of steel/aluminum frames that temporarily hold them in place before excavation starts. The grout is secured between two layers should it be necessary, ensuring that no cracks develop when properly installed at the level of the site.
Pre Installation
Before you start digging before you begin digging, it is essential to know the risks you could face. This includes knowing the equipment that is required and how many people are able to access it. It also allows you to reflect on other ways of completing the task without risking your life. Pre-excavation surveys must include a full risk assessment to ensure that any potential risks are discovered. This helps to reduce unexpected complications down the line.
The depth of the trench is an important factor to consider as well. You’ll need the support of sloping or shoring in the case of a an area of 5 feet in width. If the trench is deeper than 20 feet, it will require extra engineering work. This is because of the absence of straight sides at both ends. Anyone who builds above the ground should be considered in light of the possibility of foundation moving.
The access to the trench should be made by steps or ladders. In case in an emergency there should be a safe access within 25 feet. It is also possible to assess low oxygen levels and toxic gases using specially designed boxes called “trench boxes”. The setup of these articulated devices is simple, but they may increase the risk of stacking them on top of one another as you aren’t sure how high your piles will reach into their vulnerable bottom.
Care: Caring for the trench
1. Make sure to inspect the trench box and support every day for any signs of damage, and any changes.
2. While working on-site, all personnel should wear their safety gear and wear a steel-toed boot as well as high-visibility clothing.
3. It is recommended to keep heavy equipment and other tools at least three feet away from the trench’s edge.
Extracting
Since the ground around the trench box is moving in a way, it’s harder to set up than to extract it. To extract it, you could use chain slings. A crane that is overhead can also be used.
1. Straight Pull Straight Pull the most basic methods for getting materials out. Simply attach your sling two points and then lift it out, without fumbling around by using too much force or unnecessary movement.
2. Half Pull: A half pull is used to fix the trench box to one side and lift the box as much as it is possible. You can clean dirt and debris out of the trench box and not cause any damage.
3. Single Pull: To relocate the trench box you attach a single leg of chain sling to an extraction/lifting point and then raise each panel each time. You can remove it with your trusted pull.
For more information, click trench shore
