Walk behind road roller is a method of using mechanical weight and vibration to repeatedly load the compacted material to overcome the cohesive force and internal friction between the materials, remove the gas and moisture inside, and force displacement between the material particles , Wedged tightly to each other, increased the density, and made it reach a certain degree of density and flatness.

Factors that affect the compaction effect of walk behind road roller: 1. The material to be compressed and its gradation; 2. Water content; 3. Compaction energy and construction method. The walk behind road roller starts from the left and right sides and presses towards the center line ( The roller runs once in the longitudinal length for one trip) until the main roller of the roller presses to the center line, and finally pressurizes the places in the road where the main roller has not been pressed as required, that is, "two sides first, then the middle".

When the roller is used to walk behind road roller for compaction operation, the lateral displacement of the roller for the next compaction cycle is called the reverse shaft. The purpose of reversing the shaft is to ensure that the working device of the road roller is evenly compacted to any part of the road surface. If the shunting distance is too long, the rolling efficiency will be low; if walk behind road roller is too short, the turning radius will be too small, which will cause excessive squeezing of the contact surface and affect the construction quality.