1. The quality of prefabricated piles, pile rods and other products from Shandong expressway guardrail to the construction site should be checked and accepted in strict accordance with the acceptance standards (check the data of prefabricated piles, factory certificates, pile foundation quality inspection records, etc.).

Permissible range of cracks in pile body: the leakage depth is less than 5mm, the length of each leakage is not more than 100mm, and the accumulation of not more than 5% of the pile length should be repaired; the leakage depth is less than 10mm, the length of each leakage is not more than 300mm, and there are not many pile lengths. The accumulation of 10% of the length, or the lap length leakage does not exceed 100mm, and the pile cracks are not allowed to repair. end plate plane

2. The handling method of the pile should be placed in the designated position.

3. The construction site should be strictly inspected before re-inspection.
After the natural foundation piles, the soil around the piles will be compressed, and if the distance between the piles is less than a certain range, the piles will offset or float the adjacent piles. This method can eliminate the extruded soil displacement of the pile and the extruded soil caused by the extruded soil to a certain extent, but the displacement of the middle pile cannot be overcome, and can be used from the middle to the four ends. Two-cycle method of piling (below is the piling route and the number of piles in pile group construction). This method uses a single pile jump and puts as many side piles into the second cycle as possible. It can eliminate most of the internal displacement piles and reduce the soil-squeezing effect of the piles. The disadvantage is that it increases the cyclic displacement of the pile driver, which may be due to the lack of timely pile breakage, and the pile driver cannot travel as planned, thus reducing the work efficiency. to the extend. Therefore, the selection of the construction sequence, the supervision unit and the construction unit should comprehensively consider many factors such as the site, the type of piles, the nature and progress of the project, and so on.

In Shandong wave guardrail manufacturers, it must be produced according to geometric linearity

Wave beam guardrails are not intended to reduce the occurrence of minor accidents. The guardrail anti-collision mechanism is to absorb the collision momentum of the vehicle, the elastic-plastic deformation of the vehicle body, the friction and displacement of the vehicle body through the guardrail plate, so as to protect the safety of the occupants. The wave guardrail is significantly different from other safety features, it is to protect the damage (deformation) of the board and the vehicle itself, preventing more serious damage. Set up guardrail boards to avoid collision with other dangerous objects, and guardrails should be regarded as dangerous goods. That is, if, under the same conditions, the accident severity of the vehicle colliding with a certain dangerous object is lower than that of the vehicle, the guardrail cannot be used to protect the dangerous object. For example, on a flat, low-cocoon roadside, the severity of a vehicle crossing an embankment accident is less than that of a collision between a car and a guardrail, even if there are many vehicles in the accident in this part, the road guardrail protection, and other safety measures cannot be used, For example, the road geometry is improved, vision guidance facilities, speed limit signs are set, and the anti-skid performance of the road surface is improved.

At present, many barrier poles use zinc steel guardrails, which are widely used in highway and highway guardrails. Galvanized guardrails account for 69% of the total surface-treated steel. Due to the good corrosion resistance and decorative properties of galvanized sheet, compared with other galvanized sheets, its cost is low, and it has been widely used in the construction industry.