Due to the development of expressways, people's demand for expressways is increasing, and the previous expressways can no longer meet people's needs. Therefore, the expansion of highway construction is generally manifested in the expansion of highways, which is manifested in widening one or both sides of the original pavement. However, because the original highway slopes and embankments can no longer meet the construction needs, measures should be taken according to the actual situation in the process of highway expansion to make the new subgrade match the original subgrade.
Safety technology of highway engineering construction;
1, packing, compaction technology
The specification stipulates the selection of subgrade filler, gives the quantitative standard of minimum strength and maximum particle size of subgrade filler, expresses the strength of subgrade soil with CBR value, and introduces the concept of subgrade.
2, the protection technology of highway construction
In the construction of highway engineering, the slope protection is usually protected by mortar masonry, which mainly uses blocks made of concrete materials to build facing walls to resist, isolate and strengthen the slope structure.
3. Soft soil foundation treatment technology
If highway engineering projects encounter soft soil foundation problems, light materials such as fly ash can be directly used to fill the embankment, thus directly reducing the bearing capacity requirements and settlement impact on the building foundation.
4. Drainage technology in highway construction
According to different drainage methods and regions, subgrade drainage can be subdivided into surface drainage, pavement drainage and underground drainage. Among them, surface drainage can be realized by arranging drainage facilities such as intercepting ditch, rapids, side ditches and open drainage pipes on the construction site.
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