Bridge guardrails refer to guardrails installed on bridges. Its purpose is to prevent out of control vehicles from crossing the bridge, and it has the function of preventing vehicles from breaking through, underpassing, and climbing over the bridge, as well as beautifying the bridge building.

The selection of the form of bridge guardrails should first be based on the level of the highway, taking into account factors such as safety, coordination, characteristics of the objects to be protected, and site geometric conditions to determine the collision prevention level. Then, the selection of the construction form should be based on factors such as its own structure, economy, construction, and maintenance. There are three burial methods for it: direct embedding of columns, flange connection, and pouring of bridge guardrails and bridge decks into one through force transmitting steel bars. When conditions permit, a replaceable guardrail can be used.

Attention to issues during bridge guardrail construction

1. During the construction of guardrails, accurate information on various facilities should be obtained, especially the precise location of various pipelines buried in the roadbed. No damage to underground facilities is allowed during the construction process. In case of insufficient depth of underground communication pipelines, drainage pipes, or culvert roof fill, the position of the columns should be adjusted or the fixing method of the columns should be changed.

2. When the column is driven too deep, it should not be pulled out for correction. All the rest should be pulled out, and the foundation should be re compacted before being driven in, or the position of the column should be adjusted.

3. Bridge guardrails should be installed with flanges, paying attention to the positioning of the flanges and the control of the top elevation of the columns.