Year1
- 产品材质：
- 优质钢材经防腐处理
- 产品寿命：
- 30-50年
- 适用范围：
- 高速公路、国道、省道、乡村公路等
The driving method is used to set the columns. When setting up columns by the driving method, the position determined by the steel drill should be strictly followed. First, a self-made guide should be placed, and then the columns should be driven along the guide holes to ensure verticality. The column should be driven into the soil to the designed depth. When it is driven too deep, the column must not be pulled out for correction. Instead, it must be pulled out and driven in again after the foundation is compacted. The installation of columns should be consistent with the design drawings. And in coordination with the road alignment, the columns should be firmly buried in the soil, reach the design depth, and be perpendicular to the road surface.
If driving is difficult, drilling or excavation methods can be used to install the columns. When the drilling method is used to install the columns, the columns should be backfilled with the same material as the roadbed after positioning, and the filling should be compacted and compacted in layers so that it has a density no less than that of the adjacent undisturbed soil. When excavation is used for construction and columns are buried, the backfill should be made of the same good material and compacted in layers (the thickness of each layer should not exceed), and the compaction degree of the backfill should not be less than that of the adjacent undisturbed soil. Columns in rock should be backfilled with aggregate and compacted.
Considering the impact of the guardrail structure on the landscape and the driver's line of sight, the verticality, position, and elevation should be checked immediately after the columns are installed. Verticality is checked root by root using a ruler. Position inspection and spacing inspection: Straight lines are inspected using a steel ruler, and curved sections are inspected using the declination method and a theodolite is used to inspect the lateral position. The ruler is used to measure the lateral distance between the road centerline and the columns. For elevation inspection, use the road surface inside the curb as the benchmark, and use a self-made mold or level to check one root at a time. Its horizontal and vertical directions should form smooth lines. The installation of the gradient section and the end column is the part that requires special attention during construction. During construction, the position and height of the column should be strictly controlled, and the parabola shape should be paid attention to.
Installation of anti-blocking blocks, corrugated beams, and ends
After adjusting the columns, the bracket (anti-blocking block) can be installed. The bracket (anti-blocking block) is fixed between the corrugated beam and the column through connecting bolts. The bracket (anti-blocking block) should be adjusted to be accurately seated before tightening the connecting bolts.
The corrugated beams are spliced to each other through splicing bolts and fixed to the bracket (anti-blocking block) by connecting bolts. The overlapping direction of roadbed guardrails and corrugated beams is the key to installation. Installation must be carried out strictly in accordance with the drawings. The overlapping direction should be consistent with the driving direction. Corrugated beams should be continuously adjusted during installation. Therefore, its connecting bolts and splicing bolts should not be tightened prematurely, so that the oblong holes of the corrugated beam can be used for timely adjustment during the installation process to form a smooth linear shape and avoid local unevenness. When the linear shape of the guardrail is considered satisfactory, the bolts can be tightened finally. The connecting bolts between the bracket (anti-blocking block) and the corrugated beam should not be overtightened so that the long round holes can be used to adjust the temperature stress.
The end beams are spliced to each other with the standard guardrails through splicing bolts. The construction method of end beams is basically the same as that of corrugated beams. After the segmented construction is completed, the self-inspection shall be qualified and submitted to the supervision engineer for acceptance.
The corrugated guardrail is to prevent out-of-control vehicles from crossing the central divider or rushing out of the road bed on dangerous sections of the road, so as to avoid secondary accidents. It is intended to absorb energy, reduce the degree of accidents and damage to vehicles and personnel, and induce sight lines and beautify the way.
Contact person Mr. Wang Contact numberBusiness road protection>
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