First of all, the main function of drainage ditch formwork is to guide rainwater or sewage on the ground to sewers or sewage treatment facilities, so there is no need to calculate the formwork on the bottom and upper surface. Drainage ditch formwork is usually straight or curved, and its bottom shape is also corresponding, so the length, width, depth and slope of drainage ditch need to be considered in design to ensure effective drainage.
In contrast, the main function of sump is to collect rainwater or sewage on the ground and guide it to sewers or sewage treatment facilities. A sump is usually a shallow pit, and its bottom needs a calculation template to ensure that it can bear the weight and water pressure of the ground. In addition, the location and size of the water inlet should be considered in the sump to ensure that it can effectively collect water flow.
In a word, the design and use of drainage ditch formwork and sump need to consider different factors, and the calculation methods of its bottom surface and upper surface are also different. In practical engineering, design and calculation should be carried out according to specific conditions to ensure the normal operation and safety of the drainage system.