When we are driving on the expressway, we will see that there will be high-speed guardrail equipment on both sides of the expressway. The high-speed guardrail equipment on the expressway is to protect the driver. Faults or accidents, the existence of high-speed guardrail equipment can protect people's safety to a certain extent. This is why it is recommended that people wait for rescue vehicles behind the high-speed guardrail equipment if a vehicle breaks down on the highway. Let's take a look at how the high-speed guardrail equipment should be installed.
1. Column stakeout:
Stakeout is carried out according to the design point number, and the adjustment section can be used to adjust the spacing when the column is staked out, and the allocation method can be used to deal with the fractional number of the spacing. After setting out the columns, check the foundation status of each column. If the buried depth of underground communication pipes, catchment pipes or culvert tops is insufficient, the position of some columns should be adjusted and the fixing method should be changed.
Second, column installation:
The column installation should be consistent with the design point number and coordinated with the road alignment; the embedding method should be determined according to the actual situation. When the columns are buried in compact soil, the embedment depth is not less than 110 cm; when they are buried in concrete, the embedment depth is not less than 40 cm. The column is installed by drilling method, and after the column is positioned, it is backfilled with the same material as the subgrade, and compacted in layers. After the column is installed in place, it should be ensured that its horizontal direction and vertical direction form a smooth line.
3. Wave beam installation:
The wave beams are spliced with each other by splicing bolts, and fixed on the columns or beams by the connecting bolts, and the splicing direction should follow the direction of the vehicle. The connecting bolts and splicing bolts of the wave beam should not be tightened too early, so that the long circle of the wave beam can be adjusted in time during the installation process to make it a straight line and avoid local unevenness. When installing the corrugated beam, try to coordinate the top surface of the corrugated beam with the vertical curve of the road. When the line shape of the guardrail is considered satisfactory, the bolts can be tightened.
