Zone 94 in road engineering means that the fill road bed: the compaction degree of the upper embankment 0.8-1.5m is greater than or equal to 94%. In the same way, the compaction degree of 0-0.3m of the upper road bed is greater than or equal to 96%, which is zone 96; the compaction degree of 0.3-0.8m of the lower road bed is greater than or equal to 96%, which is zone 96; the compaction degree of 1.5m of the lower embankment is greater than or equal to 93 %, which is area 93.

90% have other index requirements, such as the maximum particle size and CBR value, which are clearly stipulated in the roadbed specifications, construction drawings and bidding documents.

Extended information:

Road construction precautions:

Gap-filling gravel: Although the requirements for the grading of gravel are not very high, gap filling is required Dense, still requires certain gradation and material requirements for the material. Mountain skin soil, soil with a relatively large plasticity index and soil with high water content cannot be used as gap filling materials. When the materials rolled in the stock yard do not meet the gradation requirements or there are too few fine particles, you can purchase some high-strength, clean fine materials (such as sand and stone chips mixed in), but the blending amount must be determined through trial mixing.

The mixing, paving and rolling of the granular layer is not necessarily done specifically for mixing, but for graded gravel, certain mixing and mixing is also required. The granular layer materials are required to be evenly graded and have a high moisture content. optimal. When paving, avoid concentrated thick and thin areas, and perform a self-inspection after paving. Rolling is the key to paving the granular layer. Heavy vibrating rollers should be used for rolling and steel wheel rollers should be used for static shaping.

Common problems commonly encountered in traffic control during the construction period and maintenance period are that the maintenance of the rolled base (or sub-base) is not taken seriously, the traffic control is not strict, and the structural layer does not reach the design strength before it reaches the design strength. In terms of premature damage (such as cracks, looseness, potholes, etc.), this mountain is a major factor leading to early pavement damage and must be addressed.

During the health care period, all vehicle traffic (including construction vehicles) and other operations should be prohibited on the grassroots level.

After the curing period expires, the base layer should be laid on the subbase as soon as possible, and the asphalt sealing layer should be constructed on the base layer in time. The construction quality requirements for the sealing layer are that the amount of asphalt spread meets the design requirements, the spread is uniform, and the surface is impermeable. In this regard, the construction unit must strengthen self-inspection, and any areas with insufficient spreading or water penetration must be resealed. On the closed base, only vehicles working on the surface layer of this road section are allowed to pass, and vehicles working on other road sections still use the sidewalk.