1, subgrade construction

Subgrade should be determined according to the site conditions and the purpose of use. If the site is relatively flat and the soil is good, then level the site and then roll it. Roller can be used for rolling, and manual tamping can also be used for tamping. If the soil is poor, or it takes a long time to use, or trucks are often loaded on the road, it is necessary to make a pavement cushion. There are many kinds of cushions, which should be decided according to the actual situation and local materials. Generally, there are lime-soil cushion, stone cushion and cement stabilized macadam cushion. The construction methods of these cushions are relatively simple, so I won't describe them one by one.

2, the surface construction

Concrete paving is mainly two processes: shuttering and concrete vibrating; Channel steel is generally used for formwork, and vibrating beam is used for vibrating concrete. Channel steel is both a template and a guide rail for moving vibrating beams, so the construction speed is faster and the flatness quality is better. If it is simple, the template is either steel template or wood template, and the vibrating concrete adopts flat vibrator or vibrator. Commercial concrete for concrete is nothing, but it is more complicated to mix it on site.

During the construction, the 6-meter-wide pavement should be divided into two parts. First, build a 3-meter-wide pavement, then erect formwork and pour concrete, and they go forward in rows. In this way, the concrete between the two pavements is not poured at the same time, and the setting time is different, which naturally forms the construction joint in the longitudinal direction.

After the concrete is poured, it should be cured and slit in time. It is necessary to master the time of concrete strength when cutting joints, neither too early nor too late. Joining includes a longitudinal direction and a transverse direction, and transverse joints are cut at regular intervals in the transverse direction. The purpose of jointing is mainly to prevent irregular cracks.