Dalian steel mesh guardrail installation mode and precautions

Installation mode of steel mesh guardrail: anchor bolt or mobile type; Dalian medium-sized steel mesh guardrail is easy to install, and iron expansion bolts are used for fixed installation; The mobile type uses a composite base and a non steel balance block, which can be quickly repaired. After damage, it can be quickly and partially assembled or replaced. After use, the road vision is cleaner and eye-catching, and it does not corrode, requires no regular maintenance, avoids additional expenditure, and does not cause pollution to the environment; In case of collision, the damage degree of people and vehicles is smaller than that of traditional guardrails; This product has many specifications and complete varieties. You can choose any height and color.

1. The highway guardrail should be implemented as early as possible after the subgrade works of the expressway are completed; The construction unit shall prepare specific construction organization design before construction and submit it to the supervision engineer for approval. The Contractor shall design the installation method of guardrail steel mesh guardrail according to the approved construction organization, carry out the construction setting out according to the requirements of the drawings and the actual terrain and surface features, determine the construction design of the central line of the column, carry out the necessary site clearing and root digging to build the highway guardrail network according to the determined slope and line.

2. If there is a break in the road fence or at a road intersection, the column spacing can be adjusted appropriately as required. When crossing the river, when the width of both banks of the river is not more than 6M, they should be connected as shown in the drawing or with barbed wire; When the width of both banks of the river is greater than 6 m, the highway guardrail net shall be set to terminate the blocking connection.

3. When the construction design unit requires to embed the column, support or anchor head of the guardrail net into the concrete foundation in the drawings, the Contractor shall set up necessary temporary stay cables or support steel mesh guardrail installation methods to fix the column in an appropriate position until the concrete hardens. No materials or components shall be installed or tensioned on the columns, cables and supports during the concrete life of 7D. All columns shall be vertically buried according to the drawing.

Installation method and precautions of steel mesh guardrail: the installation of steel mesh guardrail columns shall take roads, railways, bridges, channels, culverts, central separation belt openings, overpasses, level crossings, etc. as control points for ranging and positioning. The corrugated beam steel mesh is divided into Type A and Type S according to the anti-collision grade. The column spacing is 4m and 2m respectively. The column spacing of 2m is reinforced column, and the column spacing of 4m is ordinary column. Non standard spacing often occurs in the actual construction, so the installed guardrail plate is called special-shaped plate. If it is a customized steel plate mesh guardrail product, due to the uncertain spacing, high manufacturing cost and impact on the project progress, the special-shaped spacing should be reduced as far as possible when determining the column spacing.

For example, the distance between two bridges shall be measured first, and whether it is necessary to add profiled plates shall be calculated and analyzed. If it is necessary to add profiled plates, the position of profiled plates shall be further determined, and then the pile number and spacing dimension shall be recorded to make profiled guardrail plates in advance; If the spacing between columns is not more than 25cm, its special-shaped guardrail board can be distributed; If the column spacing is not more than 25cm, it can be adjusted to multiple columns for allocation by distribution method. In addition, when setting out and positioning on the ramp of the overpass, the actual size of the column spacing shall be collected inside and released outside, but the size of collection and release shall not exceed 5 mm. The influence of various pipeline positions in the subgrade on the buried depth of the column shall be considered when determining the column spacing.