Installation of highway guardrails: 4. Generally, the instability of the curbstone wall is reflected in the pillar wall, ultimately causing the overall instability of the highway guardrail panels. In Nanjing, the installation of highway guardrails is challenging due to the precise alignment of the pillars. To control the absolute height of the pillar wall, we first calculate the absolute height of the curbstone wall based on the road level, then determine the construction height of the pillar wall by measuring it to be 1750px higher than the curbstone wall. During the pillar installation, each pillar is precisely measured.
According to the introduction of highway guardrails, guardrails are simply divided into two grades: A and B. Grade A is used for highways, and Grade B for county and rural roads. The main form of guardrails is the semi-rigid guardrail. It is a continuous structure consisting of corrugated steel guardrails joined together and supported by main posts. This structure's function is to cushion and absorb the energy generated by vehicle collisions, allowing vehicles to travel in the correct direction. This, in turn, helps prevent traffic accidents. Highway guardrails require high standards, with the national standard being the China Traffic Industry Standard JTT 281-2007 for Highway W-beam Steel Guardrails. The specifications for the guardrail panels are 4.0mm thick, the posts are 140*4.5mm, typically with a height of 2150mm for pile posts and 1100mm for concrete embedded posts. They are connected using resistance blocks. The bolts are 45# steel. For the installation of highway guardrails in Nanjing, anti-theft measures include AB, with the cap thickness at 3.0mm and gaskets at 4.0mm.
Highway rumble strips offer numerous functionalities, primarily evident in the following aspects. Firstly, the barrier function of the highway rumble strip panels. Traffic rumble strips prevent undesirable traffic behaviors, blocking pedestrians, bicycles, or motor vehicles attempting to cross the road. They require the rumble strips to have a certain height, density (referring to the vertical barrier), and strength. Consequently, high-speed rumble strips are categorized into five collision-avoidance levels based on different collision-avoidance standards, each applied to corresponding road sections. The separation function of the highway rumble strip panels. Traffic rumble strips segregate the traffic of motor vehicles, non-motor vehicles, and pedestrians, dividing the road longitudinally along the sections, allowing separate travel for motor vehicles, non-motor vehicles, and pedestrians, enhancing road traffic safety and order. Particularly on highways, this protects surrounding vehicles, pedestrians, and other livestock such as cattle and sheep.
Nanjing Highway Guardrails - Nanjing Hengda - The construction of Nanjing Highway guardrails is provided by Nanjing Hengda Traffic Engineering Co., Ltd. Nanjing Hengda Traffic Engineering Co., Ltd. is a company specializing in "traffic engineering, municipal engineering design, and construction." The company adheres to the philosophy of "honest operation, dedicated service," and offers you better products and services. Please call for inquiries! Contact: Xu Xinshui.
