Bridge guardrails refer to guardrails installed on bridges. Its purpose is to prevent out-of-control vehicles from crossing the bridge, and has the function of preventing vehicles from breaking through, passing under, and over the bridge and beautifying the bridge architecture.
The selection of bridge guardrail form should first determine the anti-collision level based on the highway grade, comprehensive consideration of its safety, coordination, characteristics of the object to be protected and on-site geometric conditions, etc., and then determine the anti-collision level based on its own structure, economy and Factors such as construction and maintenance are used to select the structural form. There are three methods of embedding: direct column embedding, flange connection, and bridge guardrails and bridge decks cast into one through force-transmitting steel bars. When conditions permit, removable guardrails can be used.
Things to note when constructing bridge guardrails
When constructing guardrails, information on various facilities should be accurately grasped, especially the exact locations of various pipelines buried in the roadbed. During the construction process, no damage to underground facilities is allowed. Any damage. If the depth of underground communication pipelines, drainage pipes or culvert top filling is insufficient, the position of the columns should be adjusted or the method of fixing the columns should be changed.
When the column is driven too deep, it is not allowed to pull out the column for correction. It is necessary to pull out all the rest, re-tamp the foundation before driving in, or adjust the position of the column.
. Flanges should be installed on bridge guardrails, and attention should be paid to the positioning of the flanges and the control of the top elevation of the columns.
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